CN110518385B

CN110518385B - Terminal, terminal connecting device with terminal and motor

Info

Publication number: CN110518385B
Application number: CN201910939686.3A
Authority: CN
Inventors: 王振; 王富冈; 冯佳慧
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2025-07-22
Anticipated expiration: 2039-09-30
Also published as: CN110518385A

Abstract

The present disclosure provides a terminal and a terminal connection device and a motor having the terminal, wherein the terminal is made of a conductive material and is used to electrically connect a pin of the motor to an external connector, and the terminal comprises: a first terminal portion, comprising a first body and an elastic contact piece, wherein the first body defines a first insertion direction for inserting the pin, the elastic contact piece extends from the first body, and the elastic contact piece is configured to elastically deform as the pin is inserted to apply a contact force to the pin; a second terminal portion, comprising a second body, the second body defines a second insertion direction for inserting into the external connector; and a bending portion, wherein the first terminal portion and the second terminal portion are connected via the bending portion so that the first insertion direction is substantially perpendicular to the second insertion direction.

Description

Terminal, terminal connecting device with terminal and motor

Technical Field

The invention relates to a terminal, a terminal connecting device with the terminal and a motor.

Background

The small motor is an important basic product widely applied in various fields such as factory automation, home life automation, office automation and the like, and the small motor is commonly used and divided into a leaded motor and a leadless motor according to the connection mode of leads. A leaded motor refers to a so-called direct connection in which the lead wires are directly connected to the respective terminals to supply current to the motor stator windings. A leadless motor is a motor with only a connector port, and the lead is connected with the motor as a separate part through a matching interface, namely a so-called indirect connection mode.

In general, in the scheme of a leaded motor, a structure is adopted in which a lead is welded with a circuit board (PCB board) and then the PCB board is welded to a pin corresponding to a motor winding, while a leadless motor is a structure in which an external connector is inserted onto the PCB board and the PCB board is welded to a pin corresponding to a motor winding.

However, the intermediate transitions are connected by means of a PCB, whether the aforesaid leaded or leadless motor solution. The PCB connection mode can cause a series of problems that firstly, the circuit breaking of a motor is caused by unsmooth electrical connection in the PCB, secondly, the PCB adopts at least one welding procedure, so that the problems of welding cold joint, pad falling, welding bead splashing to a gear and the like are likely to occur, and finally, the welding labor cost of key procedures of the PCB is high.

Disclosure of Invention

At least one embodiment of the present disclosure provides a terminal made of an electrically conductive material for electrically connecting a pin of an electric motor with an external connector, including a first terminal portion including a first body defining a first insertion direction for inserting the pin and an elastic contact extending from the first body and configured to be elastically deformed with insertion of the pin to apply a contact force on the pin, a second terminal portion including a second body defining a second insertion direction into the external connector, and a bending portion through which the first terminal portion and the second terminal portion are connected such that the first insertion direction is substantially perpendicular to the second insertion direction.

In some examples, the resilient contact includes a resilient arm bent relative to the first body to form a first included angle θ ranging from 15 ° to 50 °, the resilient arm configured to bend and deform as the pin is inserted in a direction that reduces the first included angle θ to generate the contact force, and a contact protrusion configured to contact the pin to apply the contact force.

In some examples, the first terminal portion further includes at least one stop bent from a side of the first body, the at least one stop including a side wall and a top wall, the at least one stop circumscribing the first body to form a pin cavity for receiving the pin.

In some examples, the first body includes a bottom wall from which the resilient contact extends in the first insertion direction such that when the pin is inserted into the pin cavity, a resilient connection is formed between the pin and the top wall, the contact protrusion.

In some examples, the resilient contact further includes a support arm extending from the contact protrusion and forming a second included angle α with the resilient arm such that the resilient arm and the support arm form a generally V-shape.

In some examples, the second included angle α ranges between 90 ° and 130 ° such that when the pin is inserted into the pin cavity, an end of the support arm is slidable on the bottom wall along the first insertion direction, a height a of the support arm perpendicular to the first insertion direction, a height b of the pin cavity perpendicular to the first insertion direction, and a largest dimension c of the pin cross-section satisfy the following relationships b-a < c and a < b.

In some examples, the first body includes a bottom wall, the resilient contact extends from the top wall toward the bottom wall in the first insertion direction such that when the pin is inserted into the pin cavity, a resilient connection is formed between the pin and the bottom wall, the contact protrusion, and the resilient contact further includes a support arm extending from the contact protrusion and forming a second angle α with the resilient arm such that the resilient arm and the support arm form a generally V-shape.

In some examples, the first terminal portion further includes a pair of wings bent from a side of the first body, the resilient contacts being bent from a surface of the pair of wings toward each other to form a pair of contact protrusions such that when the pin is inserted, a resilient connection is formed between the pin and the pair of contact protrusions.

In some examples, the resilient contact is a pair of flanks bent from the side of the first body, the flanks including a planar portion and contact protrusions protruding from a middle portion of the planar portion toward the opposite other flank to form a pair of contact protrusions such that when the pin is inserted, a resilient connection is formed between the pin and the pair of contact protrusions.

In some examples, the second terminal portion further includes a snap spring including a root extending from the second body and a free portion extending from the root away from the second body and obliquely relative to the second body.

In some examples, the second terminal portion is rectangular or U-shaped in cross-sectional shape, including at least two second sidewalls extending along the second insertion direction, configured to electrically connect with an electrical contact portion of the external connector when the external connector is inserted.

In some examples, the external connector is a RAST connector, the electrical contact portion includes at least two contact clips, and the at least two second sidewalls are configured to electrically connect with the at least two contact clips of the external connector, respectively, when the external connector is inserted.

In some examples, the bent portion is provided on either side surface of an end of the first body opposite the elastic contact.

In some examples, the first and second terminal portions are integrally stamped and formed from a conductive material having a thickness between 0.2mm and 0.5 mm.

At least one embodiment of the present disclosure provides a terminal connection device including a plurality of the above-described terminals, and a housing made of an insulating material, the housing including a body portion configured to receive the terminals and a socket portion configured to receive electrical contact portions of an external connector such that the terminals are electrically connected with the external connector within the terminal connection device.

In some examples, the main body portion is provided with a plurality of mounting holes for receiving the second terminal portions and a plurality of mounting slots for receiving the first terminal portions, the mounting holes being disposed adjacent to the respective mounting slots to form mounting pairs, each of the mounting pairs mounting one of the terminals, a mounting gap between each of the plurality of mounting slots and the first body being between 0 and 0.5 mm.

In some examples, a depth of each of the plurality of mounting slots is greater than or equal to a height of the first body of the first terminal portion, and each of the plurality of mounting slots includes a limit tab protruding from at least one sidewall of the mounting slot and engaging the first terminal portion to limit wobble of the terminal.

In some examples, each of the plurality of mounting holes includes a guide locating rib disposed within the mounting hole having a width slightly less than a width between inner surfaces of the at least two second sidewalls of the second terminal portion to allow for being received between inner surfaces of the at least two second sidewalls of the second terminal portion, a drop-out prevention tab protruding from the inner surfaces of the mounting hole configured to form a snap connection with the snap spring when the second terminal portion is mounted.

In some examples, insulating ribs are provided between adjacent ones of the mounting pairs.

At least one embodiment of the present disclosure provides a motor including a motor housing accommodating a coil assembly, a pin electrically connected with the coil assembly, and the above-described terminal connection device, wherein the pin and the external connector are electrically connected in the terminal connection device through the terminal.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present invention and are not limiting of the present invention.

Fig. 1A illustrates a perspective view of a terminal according to an exemplary embodiment of the present disclosure;

FIG. 1B is a front view of the terminal shown in FIG. 1A;

FIG. 1C is a cross-sectional view of the terminal shown in FIG. 1A;

FIG. 1D is an enlarged view of a portion of the terminal shown in FIG. 1C, showing the engagement of the pin with the first terminal portion;

fig. 2A illustrates a perspective view of a terminal according to another embodiment of the present disclosure;

fig. 2B is a cross-sectional view of the terminal shown in fig. 2A;

Fig. 3A illustrates a perspective view of a terminal according to yet another embodiment of the present disclosure;

FIG. 3B is a top view of the terminal shown in FIG. 3A;

Fig. 4A illustrates a perspective view of a terminal according to yet another embodiment of the present disclosure;

FIG. 4B is a top view of the terminal shown in FIG. 4A;

Fig. 5 illustrates a perspective view of a terminal according to an alternative embodiment of the present disclosure;

fig. 6 illustrates a perspective view of a terminal according to yet another alternative embodiment of the present disclosure;

Fig. 7 illustrates a perspective view of a terminal connection device according to an exemplary embodiment of the present disclosure;

Fig. 8 shows an exploded view of fig. 7 and shows the chamfer of the limit boss in a partially enlarged view.

Fig. 9 is a perspective view of the terminal connection device shown in fig. 7 from another angle;

FIG. 10 illustrates a partial enlarged view of a body portion according to an exemplary embodiment of the present disclosure;

fig. 11 shows a partially enlarged view of the terminal connection device shown in fig. 7;

Fig. 12 illustrates a cross-sectional view of a terminal connection device according to an exemplary embodiment of the present disclosure;

fig. 13 illustrates a cross-sectional view of a terminal connection device according to an exemplary embodiment of the present disclosure after installation with an external connector;

fig. 14A to 14C are cross-sectional views illustrating a mounting process of a terminal according to an exemplary embodiment of the present disclosure;

Fig. 15 illustrates a cross-sectional view showing a mounting process of a terminal according to another embodiment of the present disclosure;

Fig. 16 illustrates a perspective view of a motor according to an exemplary embodiment of the present disclosure;

fig. 17 shows an exploded view of the motor according to fig. 16.

List of reference numerals

1. First terminal portion

11. First body

12. Elastic contact

121. Elastic arm

122. Contact protrusion

123. Support arm

13. Limiting part

131. Side wall

132. Top wall

133. Pin cavity

14. Bottom wall

15. Side flap

151,152 Pair of wings

153,154 Contact bump pairs

155,156 Plane portions

2. Second terminal portion

21. Second body

211. A second side wall

22. Clamping elastic piece

221. Root portion

222. Free part

3. Bending part

31. Incision

4. Shell body

5. Body part

51. Mounting hole

511. Guiding and positioning rib

512. Anti-drop boss

52. Mounting groove

521. Side wall

522. Spacing boss

523. Chamfering tool

53. Insulation convex rib

6. Socket part

7. Motor shell

8. Coil assembly

81. Skeleton frame

82. Enamelled wire

9. Transmission assembly

10. Rotor assembly

20. Contact pin

30. External connector

301. Contact spring

100. Terminal for connecting a plurality of terminals

200. Terminal connecting device

300. Motor with a motor housing

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

A typical electric machine generally includes a coil assembly and a rotor assembly, the coil assembly being energized to produce a magnetic field that drives the rotor assembly. The coil assembly comprises a contact pin and a winding, wherein the contact pin is electrically connected with the winding and is used as an interface connected with an external power supply, and the contact pin is welded on a PCB board in a PCB board mode and is electrically connected with an external connector. The PCB connection mode can cause a series of problems that firstly, the circuit breaking of a motor is caused by unsmooth electrical connection in the PCB, secondly, the PCB adopts at least one welding procedure, so that the problems of welding cold joint, pad falling, welding bead splashing to a gear and the like are likely to occur, and finally, the welding labor cost of key procedures of the PCB is high.

The female terminal and the male terminal referred to in the present invention refer to a manner in which terminals are electrically connected, for example, the female terminal may also be referred to as a female terminal having a connection cavity to be electrically connected to a connector by being accommodated in the connection cavity, and the male terminal may also be referred to as a male terminal having a connection wall to be electrically connected to a connector by being inserted into the connection cavity of the connector.

The present invention discloses a terminal 100 which can be electrically connected with a pin 20 of a motor 300 and an external connector 30 through a first terminal portion 1 and a second terminal portion 2, respectively, so as to connect the pin 20 of the motor 300 with the external connector 30. The first terminal portion 1 is preferably a female terminal and the second terminal portion 2 is preferably a male terminal. The wiring scheme realized by the invention can omit the PCB, thereby avoiding the technical problems of complex installation, desoldering and the like related to the scheme of switching through the PCB.

The terminal 100 according to at least one embodiment of the present disclosure includes a first terminal portion 1, the first terminal portion 1 including a first body 11 and an elastic contact 12, the first body 11 defining a first insertion direction a for inserting the pin 20, the elastic contact 12 extending from the first body 11, and the elastic contact 12 configured to be elastically deformed as the pin 20 is inserted to apply a contact force on the pin 20, a second terminal portion 2 including a second body 21, the second body 21 defining a second insertion direction B for inserting into the external connector 30, and a bent portion 3, the first terminal portion 1 and the second terminal portion 2 being connected by the bent portion 3 such that the first insertion direction a is substantially perpendicular to the second insertion direction B.

A terminal 100 according to an exemplary embodiment of the present invention will be described below with reference to fig. 1A to 1D. Fig. 1A illustrates a perspective view of a terminal according to an exemplary embodiment of the present disclosure, fig. 1B is a front view of the terminal illustrated in fig. 1A, fig. 1C is a cross-sectional view of the terminal illustrated in fig. 1A, and fig. 1D is a partial enlarged view of the terminal illustrated in fig. 1C, which illustrates an engaged state when a pin is partially engaged with the first terminal. As shown, the terminal 100 includes a first terminal portion 1, a second terminal portion 2, and a bent portion 3, the first terminal portion 1 includes a first body 11 and an elastic contact 12, the first body 11 defines a first insertion direction a for inserting the pin 20, the elastic contact 12 extends from the first body 11 along the first insertion direction a, and the elastic contact 12 applies a component force F of a contact force to the pin 20 perpendicular to the first insertion direction a. The second terminal portion 2 includes a second body 21, the second body 21 defining a second insertion direction B into the external connector 30.

In the present embodiment, the first terminal portion 1, the second terminal portion 2, and the bent portion 3 are integrally formed, for example, by press molding. The first terminal portion 1 and the second terminal portion 2 are connected by the bent portion 3, and the bent portion 3 is provided on either side surface of the first body 11 at an end opposite to the elastic contact 12, in this embodiment, the bent portion 3 is provided at an end opposite to the elastic contact 12 and is located on a side surface facing outward of the paper in fig. 1A, and the bent portion 3 may be provided at other positions, for example, a side surface facing inward of the paper, or an end side surface facing opposite to the elastic contact 12, as will be described in the subsequent embodiments. The bent portion 3 has a bent right angle shape, and thus the first terminal portion 1 and the second terminal portion 2 are bent substantially perpendicularly, so that the first insertion direction a is substantially perpendicular to the second insertion direction B.

In a typical motor configuration, when the motor base is placed on a horizontal plane, the output shaft of the motor is generally perpendicular to the horizontal plane, and the pins of the coil assembly are generally parallel to the horizontal plane. The external connector is usually inserted into the motor housing from below, and thus the mounting direction of the external connector is usually perpendicular to the mounting direction of the pins, and thus the terminal 100 of the present invention is designed in consideration of the above, and the first terminal portion 1 for electrically connecting the pins and the second terminal portion 2 for electrically connecting the external connector are bent to be substantially perpendicular by the bending portion 3, facilitating the mounting operation. The bending part 3 may also have a cut 31, which may simplify the structure and save material.

It should be noted that, in the present invention, the term "substantially vertical" refers to 90 degrees or about 90 degrees, and it is very difficult to achieve a perfect vertical position between two components, that is, precisely 90 degrees, in consideration of practical production, but in practical application, a deviation from 90 degrees, for example, within plus or minus 5 degrees, may also achieve technical effects of the present invention.

The terminal 100 is made of a conductive material commonly used in the art, such as copper, aluminum, copper alloy or aluminum alloy, preferably copper or copper alloy, with a thickness of between 0.2mm and 0.5mm, such as 0.3mm, and is preferably integrally formed by stamping using a die. The thickness of the material is selected mainly by considering the following factors that if the thickness of the material is too thin, for example, less than 0.2mm, the mechanical strength of the manufactured terminal is too weak to meet the requirement of the plugging strength of the terminal, and if the thickness of the material is too thick, for example, more than 0.5mm, the elastic coefficient of the elastic contact 12 is too large, so that the assembly difficulty is high, and meanwhile, the whole size of the terminal is necessarily increased due to the increase of the thickness of the material, so that the whole installation space is increased, and the space and the material cost are wasted.

In this embodiment, the first terminal portion 1 further includes at least one limiting portion 13, preferably two limiting portions 13, formed by bending from a side surface of the first body 11, each limiting portion 13 includes a side wall 131 and a top wall 132, and the limiting portion 13 and the first body 11 form a pin cavity 133 for receiving the pin 20.

The elastic contact 12 includes an elastic arm 121, a contact protrusion 122, and a support arm 123, the elastic arm 121 being bent with respect to the first body 11 to form a first angle θ, the elastic arm being configured to be bent and deformed in a direction to decrease the first angle θ to generate a contact force as the pin is inserted, the contact protrusion 122 being configured to contact the pin 20 to apply the contact force.

In the present embodiment, the first body 11 includes a bottom wall 14, and the elastic contact 12 extends from the bottom wall 14 along the first insertion direction a in a bending manner, so that when the pin 20 is inserted into the pin cavity 133 along the first insertion direction a, an elastic connection is formed between the pin 20 and the top wall 132 and the contact protrusion 122.

The support arm 123 extends from the contact protrusion 122 and forms a second angle α with the elastic arm 121, such that the elastic arm 121 and the support arm 123 form a substantially V-shape. As shown, the height of the support arm 123 perpendicular to the first insertion direction a is a, the height of the pin cavity 133 perpendicular to the first insertion direction a is b, which may also be defined as the distance between the bottom surface of the top wall 132 and the surface of the first body 11, and the maximum dimension of the cross section of the pin 20 is c, the above parameters being designed to satisfy the relationships b-a < c and a < b. In practice, the size of the pin 20 is given, so c can be considered a constant. Thus, the magnitudes of parameters a and b can be adjusted according to the above relationship. The size of b-a may be considered as the clearance between the contact protrusion 122 and the top wall 132 in the uninserted state, while satisfying b-a < c may ensure that the pin 20 can drive the deformation of the elastic contact 12, in particular the deformation of the elastic arm 121, during insertion such that the first angle θ becomes smaller, when the contact protrusion 122 tightly engages the pin 20, i.e. an interference fit is formed between the elastic contact 12 and the pin 20. And a < b is satisfied in order to ensure that the above gap is greater than 0. Those skilled in the art will readily appreciate that the first angle θ and the second angle α may be designed to take into account the dimensional relationship of the portions of the resilient contact 12, for example, the first angle θ may range from 15 ° to 50 °, for example, 15 °,20 °,30 °,50 °, and the second angle α may range from 90 ° to 130 °, for example, 100 °,110 °, 130 °, whereby the second angle α is an obtuse angle, and this design mainly allows for the support arm 123 to contact the first body when the resilient arm 121 is deformed toward the first body 11 and slide along the direction a, facilitating insertion of the pin 20 while supporting the resilient contact 12, preventing excessive deformation failure of the resilient arm 121, and also preventing the resilient contact 12 from being damaged when an improperly sized (oversized) pin 20 or other connector is inserted.

The second body 21 of the second terminal portion 2 may be rectangular or U-shaped in cross-sectional shape, comprising at least two second side walls 211 extending in the second insertion direction B for being configured to be electrically connected with the electrical contact portions of the external connector 30 upon insertion of the external connector 30. Specifically, the second body 21 may include two second sidewalls 211. When the external connector is a RAST connector, the electrical contact portions may be two contact spring pieces 301, the two second side walls 211 being for respectively engaging the two contact spring pieces 301 of the external connector 30 when the external connector 30 is inserted, in the present embodiment, the second body 21 has a U-shape in cross-section and extends in the second insertion direction B.

As shown in the drawing, the second terminal portion 2 further includes two snap elastic members 22, the snap elastic members 22 including a root portion 221 extending from the second side wall 211 of the second body 21 and a free portion 222 extending away from the second body 21 from the root portion 221 and obliquely with respect to the second body 21. The fitting manner of the snap elastic member 22 will be described in detail later.

Having described the configuration of the terminal 100 according to an exemplary embodiment, a method of manufacturing the terminal 100 of this embodiment is briefly described below, which is merely exemplary, and the terminal 100 may be manufactured using other methods conventional in the art. First, a copper plate material having a thickness of 0.3mm is provided, and the first terminal portion 1, the second terminal portion 2, and the bent portion 3 of the terminal 100 are formed by punching on the copper plate while being in the same plane. Next, the respective characteristic portions of the first terminal portion 1 and the second terminal portion 2, including but not limited to the elastic contact 12, the elastic arm 121, the contact protrusion 122, the supporting arm 123, the stopper 13, the second side wall 211, and the snap elastic member 22, are bent out. Finally, the bent portion 3 is bent at 90 degrees so that the first terminal portion 1 is perpendicular to the second terminal portion 2, thereby forming the terminal 100 of this embodiment.

A terminal 100 according to another exemplary embodiment of the present invention will be described below with reference to fig. 2A to 2B. Fig. 2A illustrates a perspective view of a terminal according to another embodiment of the present disclosure, and fig. 2B is a cross-sectional view of the terminal illustrated in fig. 2A. Only the differences between the present embodiment and the embodiments shown in fig. 1A to 1D will be described below, and the similar parts will not be described herein. In the present embodiment, the elastic contact 12 is folded and extended from the top wall 132 toward the bottom wall 14 of one of the stopper portions 13 (e.g., the stopper portion 13 closer to the end portion) in the first insertion direction a, unlike the extension start point of the elastic contact 12 of the present embodiment, as compared with the embodiment shown in fig. 1A to 1D. At this time, when the pin 20 is inserted into the pin cavity 133, an elastic connection is formed between the pin 20 and the bottom wall 14 of the first body 11, the contact protrusion 122.

Referring to fig. 3A to 3B, a terminal 100 according to still another exemplary embodiment of the present invention is shown.

Fig. 3A illustrates a perspective view of a terminal according to yet another embodiment of the present disclosure, and fig. 3B is a top view of the terminal illustrated in fig. 3A. Only the differences between the present embodiment and the embodiments shown in fig. 1A to 1D will be described below, and the similar parts will not be described herein. The arrangement of the elastic contact 12 in this embodiment is different from that of the embodiment shown in fig. 1A to 1D or fig. 2A to 2B. Specifically, the elastic contact 12 is formed by bending a pair of side wings 15 toward each other, and the side wings 15 are formed by bending a side surface of the first body 11. In this embodiment, a pair of wings 15 form a pair of wings 151,152, and the pair of wings 151,152 are folded toward each other to form a pair of contact protrusions 153,154.

As shown in fig. 3B, the resilient contact 12 is bent into a V-shape similar to the V-shape of the embodiment shown in fig. 1A to 1D or fig. 2A to 2B, except that when the pin 20 is inserted in the first insertion direction a, a resilient connection is formed between the pin 20 and the pair of contact protrusions 153,154.

Referring to fig. 4A to 4B, a terminal 100 according to still another exemplary embodiment of the present invention is shown.

Fig. 4A illustrates a perspective view of a terminal according to still another embodiment of the present disclosure, and fig. 4B is a top view of the terminal illustrated in fig. 4A. Only the differences between the present embodiment and the embodiments shown in fig. 3A to 3B will be described below, and the similar parts will not be described herein. The arrangement of the elastic contact 12 of the present embodiment is different from that of the embodiment shown in fig. 3A to 3B. Specifically, the elastic contact 12 is a pair of side wings 151,152 formed by bending from the side surface of the first body 11, the side wings 151,152 including planar portions 155,156 and a pair of contact protrusions 153,154 protruding from the middle of the planar portions 155,156 toward the opposite other side wing, thereby forming a pair of contact protrusions such that when the pin 20 is inserted in the first insertion direction a, an elastic connection is formed between the pin 20 and the pair of contact protrusions 153,154.

Fig. 5 and 6 in turn illustrate a terminal 100 according to two alternative embodiments of the present disclosure. Fig. 5 shows a perspective view of a terminal according to an alternative embodiment of the present disclosure, and fig. 6 shows a perspective view of a terminal according to yet another alternative embodiment of the present disclosure. The second terminal portion 2 and the bent portion 3 of the two embodiments are different in structure from those of the foregoing respective embodiments. Specifically, in the alternative embodiment shown in fig. 5, the number of snap elastic members 22 is one, and they are disposed on the back surface of the U-shaped second body 21, that is, the surface connecting the two second side walls 211. In the alternative embodiment shown in fig. 6, the second body 21 has a rectangular cross-sectional shape, and the number of snap-fit elastic members 22 is one, and similarly, is also provided on the back surface of the rectangular second body 21, i.e., the surface facing the first body 11 in the rectangular cross-section. In this alternative embodiment, the bent portion 3 is provided on the end side surface facing the elastic contact 12 so that the first terminal portion 1 and the second terminal portion 2 are disposed substantially in the same plane and substantially perpendicular to each other.

The invention discloses a terminal connection device 200 comprising a plurality of terminals 100 as described above and a housing 4 made of an insulating material, the housing 4 comprising a body portion 5 and a socket portion 6, the body portion 5 being configured to receive the terminals 100, the socket portion 6 being configured to receive an electrical contact portion of an external connector 30 such that the terminals 100 are electrically connected with the external connector 30 within the terminal connection device 200.

The terminal connection device 200 may be fixed to the motor 300 by means of a snap-fit connection. The terminal connection device 200 stably holds the terminal 100, one end of the terminal 100 is connected to the pin 20 of the motor 300, and the other end is connected to the external connector 30. The wiring scheme realized by the invention can omit the PCB, thereby avoiding the technical problems of complex installation and the like related to the scheme of switching through the PCB, and realizing the optimal arrangement and position stability of the terminals. Furthermore, it has other technical advantages as will be mentioned below.

A terminal connection device 200 according to an exemplary embodiment of the present invention will be described below with reference to fig. 7 to 13. Fig. 7 illustrates a perspective view of a terminal connection device according to an exemplary embodiment of the present disclosure, fig. 8 illustrates an exploded view of fig. 7, and illustrates a chamfer of a limit boss in a partially enlarged view. Fig. 9 is a perspective view of the terminal connection device shown in fig. 7 from another angle. Fig. 10 illustrates a partial enlarged view of a body portion according to an exemplary embodiment of the present disclosure. Fig. 11 shows a partially enlarged view of the terminal connection device shown in fig. 7. Fig. 12 illustrates a cross-sectional view of a terminal connection device according to an exemplary embodiment of the present disclosure. Fig. 13 illustrates a cross-sectional view of a terminal connection device according to an exemplary embodiment of the present disclosure after installation with an external connector.

As shown, the terminal connection device 200 includes a housing 4 and a plurality of terminals 100, preferably two terminals 100, the housing 4 including a body portion 5 and a socket portion 6, the body portion 5 being configured to receive the terminals 100, the socket portion 6 being configured to receive the external connector 30, the terminals 100 and the external connector 30 being electrically connected to each other in the terminal connection device 200. The configuration of the housing 4 of the terminal connection device 200 will be described below.

As described above, the housing 4 includes the body portion 5 and the socket portion 6, and the body portion 5 and the socket portion 6 may be formed as one body by injection molding. The main body portion 5 is provided with a plurality of mounting holes 51 for receiving the second terminal portion 2 of the terminal 100 and a plurality of mounting grooves 52 for receiving the first terminal portion 1 of the terminal 100, the mounting holes 51 being disposed adjacent to the respective mounting grooves 52 to form mounting pairs, each mounting pair mounting one terminal 100. In the present embodiment, the housing 4 includes two mounting pairs formed by the mounting holes 51 and the mounting grooves 52, respectively mounting the two terminals 100.

The mounting grooves 52 are mainly used to engage the first terminal portion 1 of the terminal 100, the mounting gap between the mounting groove 52 and the first body 11 of the first terminal portion 1 is between 0 to 0.5mm, the depth of the mounting groove 52 is greater than or equal to the height of the first body 11 of the first terminal portion 1 so that the first terminal portion 1 can be fully inserted into the mounting groove 52, and each mounting groove 52 includes a limit boss 522 protruding from one side wall of the mounting groove 52 and engaging the first terminal portion 1 of the terminal 100, specifically the first body 11, when the terminal 100 is inserted in the second insertion direction B to position the terminal 100 in the mounting groove 52 and limit the shake of the terminal 100 by the limit boss 522, thereby ensuring a stable installation of the terminal 100. The end of the limit boss 522 may be further provided with a chamfer 523, as shown in fig. 8 and 11, the chamfer 523 may facilitate installation and disassembly, and avoid machining burrs from interfering with installation or causing injury to a user.

The mounting holes 51 are mainly used for accommodating the second terminal portions 2 of the terminals 100, and each mounting hole 51 includes a guide positioning rib 511 and an escape prevention boss 512, the guide positioning rib 511 being provided in the mounting hole 51 with a width slightly smaller than a width between inner surfaces of at least two second side walls 211 of the second terminal portion 2 to allow being configured to be received between inner surfaces of at least two second side walls 211 of the second terminal portion 2. For example, the width of the guiding rib 511 is slightly smaller than the width between the inner surfaces of the two second side walls 211 of the second terminal portion 2, in this embodiment, the single-side fit clearance is not greater than 0.1mm, which helps to support the side walls of the second terminal portion 2, so that when the second side walls 211 of the second terminal portion 2 are elastically and electrically connected with the external connector 30, the clamping force of the external connector 30 to the second side walls 211 of the second terminal portion 2 is prevented from causing the side walls to be close to each other, and the electrical connection failure is prevented. As shown in fig. 12 and 13, in order to better position and fix the position of the second terminal portion 2, the side of the guide positioning rib 511 in contact with the inner surface of the second side wall 211 of the second terminal portion 2 has a draft angle such that the thickness of the guide positioning rib 511 gradually increases in the second insertion direction B to facilitate the insertion and positioning of the second terminal portion 2. The coming-off preventing boss 512 protrudes from the inner surface of the mounting hole 51, and as shown in fig. 12, the coming-off preventing boss 512 is configured to form a snap-fit connection with the snap-fit elastic member 22 when the second terminal portion 2 is mounted. The mounting process of the second terminal portion 2 will be described in detail later.

In addition, since the terminals 100 are electrified during operation, the insulating ribs 53 are further arranged between the adjacent mounting pairs and used for isolating and insulating the adjacent terminals 100, so that enough electric gaps and creepage distances between the terminals 100 are ensured, and the adverse phenomena of interelectrode short circuit or leakage tracking between the terminals 100 are prevented.

As shown in fig. 9, 12 and 13, the socket portion 6 is for receiving insertion of the external connector 30 from a direction opposite to the second insertion direction B, and fixing the external connector 30 by snap-fit connection.

The external connector 30 may include a pair of contact spring pieces 301 that apply a clamping force to the second side wall 211 of the second terminal portion 2, thereby achieving an electrical connection.

Fig. 14A to 14C are cross-sectional views illustrating a mounting process of a terminal according to an exemplary embodiment of the present disclosure. The mounting process of the second terminal portion 2 into the main body portion 5 of the housing 4 will be described below with reference to fig. 14A to 14C. In the present embodiment, the second terminal portion 2 may be, for example, the structure in the embodiment of fig. 1A to 4B, that is, the second terminal portion 2 includes two snap elastic members 22 extending from the second side wall 211.

Fig. 14A shows a state before the snap elastic member 22 contacts the anti-release boss 512 during the insertion of the terminal 100, where the free portion 222 of the snap elastic member 22 extends obliquely with respect to the second body 21 and is not stressed. Fig. 14B shows a state when the snap elastic member 22 is in contact with the drop-preventing boss 512 during insertion of the terminal 100, at which time the free portion 222 of the snap elastic member 22 is in contact with the drop-preventing boss 512 and deforms under the force of the surface of the drop-preventing boss 512. At this time, the force in the second insertion direction B continues to be applied to the terminal 100, and as shown in fig. 14C, the terminal 100 is fully inserted into the housing 4, the free portion 222 is not forced, and the normal shape is restored. At this time, the free portion 222 is in contact with the lower portion of the escape prevention boss 512 while the inner surface of the second side wall 211 of the second terminal portion 2 is in close contact with the limit boss 522, thereby restricting the movement of the terminal 100 in the second insertion direction B, and thus completing the installation of the terminal 100. After which the external connector 30 may be inserted into the socket portion 6 and electrically connected with the second terminal portion 2 of the terminal 100, as shown in fig. 13.

Fig. 15 shows a cross-sectional view of a second terminal portion 2 of yet another alternative embodiment mounted in a main body portion 5 of a housing 4, unlike the foregoing embodiment, the second terminal portion 2 in this embodiment may be, for example, a structure in the embodiment of fig. 5 to 6, that is, the second terminal portion 2 includes one snap elastic member 22 provided on a surface connecting two second side walls 211, and the number of the coming-off preventing bosses 512 may be one at this time, and the mounting process and principle are similar to those of the foregoing embodiment, and fig. 15 shows a state in which the second terminal portion 2 is positioned by being snapped after mounting.

The invention also discloses an electric motor 300 comprising a motor housing 7, the motor housing 7 accommodating a coil assembly 8, a pin 20 electrically connected to the coil assembly 8, and a terminal connection device 200 as described above, the pin 20 and an external connector 30 being electrically connected in the terminal connection device 200 via a terminal 100, for example forming a reliable electrical connection.

Fig. 16 illustrates a perspective view of a motor 300 according to an exemplary embodiment of the present disclosure. Fig. 17 shows an exploded view of the motor 300 according to fig. 16. The motor 300 includes the motor housing 7, the coil assembly 8, the transmission assembly 9, the rotor assembly 10, the pins 20, and the terminal connection device 200 described above. As shown in fig. 16 and 17, the terminal connection device 200 is fixedly mounted on the motor housing 7 by a snap-fit connection. The motor housing 7 accommodates a coil assembly 8, a transmission assembly 9 and a rotor assembly 10. The coil assembly 8 includes a skeleton 81 and an enamel wire 82 wound around the skeleton 81, and the contact pin 20 is electrically connected to the coil assembly 8, specifically, the enamel wire 82. The pins 20 may be mounted to the coil assembly 8 using mounting means known in the art, such as by welding, and will not be described in detail herein.

As described in the foregoing embodiments, the pins 20 of the motor 300 and the external connector 30 form a reliable electrical connection within the terminal connection device 200 through the terminals 100.

In operation, the external connector 30 receives a drive voltage signal and transmits it to the coil assembly 8 via the terminal 100 and the pin 20, thereby generating an alternating magnetic field, driving the rotor assembly 10 to rotate, the rotation of the rotor assembly 10 being transmitted to the transmission assembly 9 via the output shaft, and finally being output from the rotational shaft of the transmission assembly 9.

The motor 300 adopting the technical scheme of the embodiment has compact structure, the contact pin 20 of the motor 300 and the external connector 30 form reliable electric connection in the terminal connecting device 200 through the terminal 100, and meanwhile, the contact pin 30 and the terminal 100 are electrically connected through the elastic contact piece 12, so that the processes of welding and the like are omitted, the process cost is saved, and the production efficiency can be improved.

The foregoing is merely specific embodiments of the present invention, but the scope of the embodiments of the present invention is not limited thereto, and any person skilled in the art may easily think about variations or substitutions within the technical scope of the embodiments of the present invention or within the inventive concept of the embodiments of the present invention, and all variations or substitutions are intended to be included in the scope of the embodiments of the present invention.

Claims

1. A terminal made of a conductive material for electrically connecting a pin of an electric motor with an external connector, comprising:

A first terminal portion including a first body defining a first insertion direction for inserting the pin, and an elastic contact extending from the first body and configured to elastically deform as the pin is inserted to exert a contact force on the pin;

A second terminal portion including a second body defining a second insertion direction into the external connector, and

A bending portion through which the first terminal portion and the second terminal portion are connected such that the first insertion direction is substantially perpendicular to the second insertion direction,

Wherein the second terminal portion further comprises a snap-fit elastic member including a root portion extending from the second body and a free portion extending from the root portion away from the second body and obliquely with respect to the second body, the snap-fit elastic member being configured to snap-fit connect with the anti-drop boss of the terminal connection device upon mounting,

Wherein the second terminal portion has a rectangular or U-shaped cross-sectional shape, comprising at least two second side walls extending in the second insertion direction, configured to be electrically connected with a contact spring of an electrical contact portion of the external connector when the external connector is inserted.

2. The terminal of claim 1, wherein the resilient contact comprises a resilient arm bent with respect to the first insertion direction to form a first included angle θ ranging between 15 ° and 50 °, the resilient arm configured to bend and deform with insertion of a pin in a direction that reduces the first included angle θ to generate the contact force, and a contact protrusion configured to contact the pin to apply the contact force.

3. The terminal of claim 2, wherein the first terminal portion further comprises:

the at least one limiting part is formed by bending from the side face of the first body, the at least one limiting part comprises a side wall and a top wall, and the at least one limiting part and the first body are surrounded to form a pin cavity for receiving the pin.

4. A terminal according to claim 3, wherein the first body comprises a bottom wall from which the resilient contact extends in the first insertion direction, such that when the pin is inserted into the pin cavity, a resilient connection is formed between the pin and the top wall, the contact protrusion.

5. The terminal of claim 4, wherein the resilient contact further comprises a support arm extending from the contact projection and forming a second included angle α with the resilient arm such that the resilient arm and the support arm form a generally V-shape.

6. The terminal of claim 5, wherein said second included angle α is in the range of 90 ° to 130 °, such that when said pin is inserted into said pin cavity, an end of said support arm is slidable on said bottom wall in said first insertion direction,

The height a of the support arm perpendicular to the first insertion direction, the height b of the pin cavity perpendicular to the first insertion direction and the maximum dimension c of the pin cross-section satisfy the relationship b-a < c and a < b.

7. A terminal according to claim 3, wherein the first body comprises a bottom wall, the resilient contact extends from the top wall towards the bottom wall in the first insertion direction such that when the pin is inserted into the pin cavity, a resilient connection is formed between the pin and the bottom wall, the contact protrusion, the resilient contact further comprising a support arm extending from the contact protrusion and forming a second angle α with the resilient arm, whereby the resilient arm and the support arm form a substantially V-shape.

8. The terminal of claim 1, wherein the first terminal portion further comprises:

and a pair of side wings formed by bending from the side surface of the first body, wherein the elastic contact piece is formed by bending from the surface of the pair of side wings towards each other, so that a pair of contact protrusions is formed, and when the pin is inserted, elastic connection is formed between the pin and the pair of contact protrusions.

9. The terminal according to claim 1, wherein the elastic contact is a pair of side wings formed by bending from the side face of the first body, the side wings including a planar portion and contact protrusions protruding from a middle portion of the planar portion toward the opposite other side wing to each other, thereby forming a pair of contact protrusions such that when the pin is inserted, an elastic connection is formed between the pin and the pair of contact protrusions.

10. The terminal of claim 1, wherein the external connector is a RAST connector, the electrical contact portion comprises at least two contact clips, and the at least two second sidewalls are configured to electrically connect with the at least two contact clips of the external connector, respectively, when the external connector is inserted.

11. The terminal of claim 1, wherein the bent portion is provided on either side surface of an end of the first body opposite the elastic contact.

12. The terminal of claim 1, wherein the first and second terminal portions are integrally stamped and formed of a conductive material having a thickness of between 0.2mm and 0.5mm.

13. A terminal connection device, characterized by comprising:

a plurality of terminals as claimed in any one of claims 1 to 12, and

A housing made of an insulating material, the housing comprising a body portion configured to receive the terminals and a socket portion configured to receive electrical contact portions of an external connector such that the terminals are electrically connected with the external connector within the terminal connection device.

14. The terminal connection device according to claim 13, wherein the main body portion is provided with a plurality of mounting holes for receiving the second terminal portion and a plurality of mounting grooves for receiving the first terminal portion, the mounting holes being disposed adjacent to the respective mounting grooves to form mounting pairs, each of the mounting pairs mounting one of the terminals, a mounting gap between each of the plurality of mounting grooves and the first body being between 0 and 0.5 mm.

15. The terminal connection device of claim 14, wherein a depth of each of the plurality of mounting slots is greater than or equal to a height of the first body of the first terminal portion, and each of the plurality of mounting slots includes a limit boss protruding from at least one sidewall of the mounting slot and engaging the first terminal portion to limit rattle of the terminal.

16. The terminal connection device of claim 14, wherein each of the plurality of mounting holes comprises:

a guide positioning rib provided in the mounting hole, the guide positioning rib having a width slightly smaller than a width between inner surfaces of at least two second side walls of the second terminal portion to allow it to be received between inner surfaces of at least two second side walls of the second terminal portion;

And an anti-falling boss protruding from an inner surface of the mounting hole and configured to form a snap connection with the snap elastic member when the second terminal portion is mounted.

17. The terminal connection device according to claim 14, wherein insulating ribs are provided between adjacent ones of said mounting pairs.

18. An electric machine, comprising:

a motor housing accommodating a coil assembly;

A contact pin electrically connected with the coil assembly, and

The terminal connection device as claimed in any one of claims 13 to 17, wherein the pin and the external connector are electrically connected within the terminal connection device through the terminal.