CN103807398B - A kind of composite sport mechanism - Google Patents

Abstract

The invention discloses a composite motion mechanism, which comprises a displacement output shaft, a limit pin, a mechanism housing, a screw rod, a screw rod, a bearing, a shaft coupling, and a rotating drive element, and the screw rod of the motion mechanism is a displacement output shaft Provide linear motion power, the screw rod provides rotational motion power for the displacement output shaft, and uses the form of the limit groove to control the generation of linear displacement, rotational displacement and combined displacement, and then determines the output form of the displacement output shaft. Using this invention can make linear motion and Rotary motion shares a set of mechanisms. By adjusting the structural parameters or control parameters, the combined action sequence of linear motion and rotary motion can be realized. The structure is simple, the volume, weight and power consumption are small, and it can be applied to special automatic production line equipment for mass production. , Automatic opening and closing of vehicle hatches, etc., has a good application prospect.

Description

A compound motion mechanism

technical field

The invention relates to a mechanism capable of completing a combined action sequence of linear motion and rotary motion, which belongs to the technical field of mechanisms and machinery, and in particular relates to a composite motion mechanism.

Background technique

In the application of mechanical and automatic control engineering, some equipment needs to complete the combined action sequence of linear motion and rotary motion, which requires the use of linear motion drive mechanism and rotary motion drive mechanism to complete the action sequence alternately, but the mechanism structure of this mode is complicated. The size, weight, and power consumption are large, and in practical applications, they are often limited by the installation space and dimensions of the equipment.

Contents of the invention

In view of this, the present invention provides a compound motion mechanism, which uses a screw rod to provide linear motion power for the displacement output shaft, uses a screw rod to provide rotational motion power for the displacement output shaft, and uses the form of a limit slot to control the linear displacement and rotation. Displacement or combined displacement, and then determine the output form of the displacement output shaft. It can make the linear motion and rotary motion share a set of mechanisms. By adjusting the structural parameters or control parameters, the combined action sequence of linear motion and rotary motion can be realized. The structure is simple and the volume is small. , small weight and power consumption.

A compound motion mechanism, including a displacement output shaft, a limit pin, a mechanism housing, a screw rod, a screw rod, a bearing, a shaft coupling, and a rotary drive element, wherein the outer circumference of the displacement output shaft is processed with radial installation hole, the inner surface is processed with spiral grooves, the mechanism shell is a hollow cylindrical structure, and the inner surface is processed with two axisymmetric axial grooves, and the outer circumferences of the two ends of the cylinder are respectively processed with connecting flanges. The hollow part is divided into a small-diameter part and a large-diameter part. The large-diameter part is processed with a limited groove. The screw rod is a hollow cylindrical structure. An annular boss is processed on the outer circumference of one end, and two radially extending bosses are processed on the boss. Symmetrical lugs, protruding spiral ribs are processed on the outer surface, threads are processed on the inner surface, the screw rod is a cylindrical structure, threads are processed on the outer surface, and a connecting flange is processed on the outer circumference of one end of the rotating drive element; displacement output The shaft sleeve is set on the large diameter part of the mechanism housing, and can slide along the axial direction of the mechanism housing or rotate around the axis of the mechanism housing. In the installation hole, the screw rod is installed on the small diameter part of the mechanism housing, and the two symmetrical lugs of the screw rod are installed in the groove of the mechanism housing to guide the axial sliding of the screw rod, and the helix of the screw rod The rib and the spiral groove of the displacement output shaft form a spiral motion assembly relationship, the internal thread of the screw rod is connected with the external thread of the screw rod, the bearing is located between the screw rod and the coupling, and the screw rod is connected to the rotating drive element through the coupling The rotary shaft is connected, and the rotary drive element is fixedly connected with one end of the mechanism housing through a connecting flange.

Further, the direction of the limit groove is a straight line or an arc or a combination of the above two forms. The length of the straight line, the arc of the arc and the combination order of the two forms are set and combined according to the specific output requirements.

Further, the helical groove on the inner surface of the displacement output shaft is partially or completely processed, and the thread on the inner surface of the screw rod 4 is partially or completely processed.

Beneficial effect:

1) In the present invention, the screw rod is used to provide linear motion power for the displacement output shaft, the screw rod is used to provide rotational motion power for the displacement output shaft, and the linear displacement, rotational displacement and combined displacement are controlled by using the form of the limit groove, and then the displacement output shaft is determined. The output form of the linear motion and the rotary motion can share a set of mechanisms. By adjusting the structural parameters or control parameters, such as the linear displacement, angular displacement and time parameters of the linear and rotary motion, the combination of the linear motion and the rotary motion can be realized. Action sequence, simple structure, small size, weight and power consumption, can be applied to special automatic production line equipment for mass production, automatic opening and closing of equipment and vehicle hatches, etc., and has a good application prospect.

2) The direction of the limit groove in the embodiment of the present invention is a straight line or an arc or a combination of the above two forms. The length of the straight line, the arc of the arc and the combination order of the two forms can be set according to the specific output requirements and combinations.

When the direction of the limit groove is a straight line, the displacement output shaft will output a linear displacement. When the direction of the limit groove is an arc, the displacement output shaft will output the rotation angle displacement. The direction of the limit groove is a straight line or an arc. When combined, the displacement output shaft will output the corresponding straight line and rotation angle displacement, change the length of the straight line segment, the radian of the arc segment and the combination sequence, the displacement output shaft will output the corresponding spiral displacement, the direction of the limit groove It provides the basis for the output form of compound kinematic mechanism.

3) In the embodiment of the present invention, the spiral groove on the inner surface of the displacement output shaft 1 is partially or completely processed, and the thread on the inner surface of the screw rod 4 is partially or completely processed, which can be processed according to the specific processing difficulty. The purpose of the present invention can be realized, and the whole section can be processed to ensure more stable cooperation.

Description of drawings

The structural representation of Fig. 1 composite mechanism;

Among them: 1-displacement output shaft, 2-limit pin, 3-mechanism housing, 4-screw rod, 5-screw rod, 6-bearing, 7-coupling, 8-rotary drive element, 9-limit Slot straight section, 10-limit slot arc section, 11-groove, 12 spiral groove, 13 mounting holes.

Partial sectional view of Fig. 2 composite mechanism;

Fig. 3 is the structural representation of screw rod;

Fig. 4 is the sectional view of screw rod;

Fig. 5 is a schematic structural view of the mechanism housing;

Fig. 6 is a structural schematic diagram of a displacement output shaft;

Fig. 7 is a sectional view of the displacement output shaft;

Fig. 8 is a schematic diagram of the direction of the limit groove and the output displacement effect of the output shaft;

Among them, the direction of a-limiting groove is parallel to the axis of the output shaft, and the displacement output shaft 1 outputs a linear displacement;

b- The direction of the limit groove is the arc of rotation around the axis of the displacement output shaft 1, and the displacement output shaft 1 outputs a schematic diagram of the rotation angle displacement;

c-The direction of the limit groove is a combination of axial and axial, and the displacement output shaft 1 outputs a schematic diagram of linear displacement and rotational angle displacement in the order of combination;

d—The direction of the limit groove is the axial spiral of the displacement output shaft 1, and the displacement output shaft 1 outputs a schematic diagram of the spiral displacement around the axis.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings.

A composite motion mechanism, including a displacement output shaft 1, a limit pin 2, a mechanism housing 3, a screw rod 4, a screw rod 5, a bearing 6, a coupling 7, and a rotating drive element 8, wherein the displacement output shaft 1 Radial mounting holes 13 are processed on the outer circumference, and spiral grooves 12 are processed on the inner surface. The mechanism casing 3 is a hollow cylindrical structure. Connecting flanges are processed on the outer circumferences of the two ends of the cylinder respectively. The hollow part of the cylinder is divided into Small-diameter part and large-diameter part, two axisymmetric axial grooves 11 are processed on the inner surface of the small-diameter part, and limited grooves are processed on the large-diameter part. There is an annular boss on which two radially extending symmetrical lugs are processed, raised spiral ribs are processed on the outer surface, threads are processed on the inner surface, the screw rod 5 is a cylindrical structure, and the outer surface is processed with threads. Thread, the outer circumference of one end of the rotary drive element 8 is processed with a connecting flange.

Among them, the direction of the limit groove is a straight line or an arc or a combination of the above two forms. The length of the straight line, the radian of the arc and the combination order of the two forms can be set according to the specific output requirements, which is a compound movement. The institutional output form provides the basis.

The spiral groove on the inner surface of the displacement output shaft 1 is partially or completely processed, and the screw thread on the inner surface of the screw rod 4 is partially or completely processed, which can be processed according to the specific processing difficulty. Both the processed part and the entire segment can achieve the purpose of the present invention , Processing the entire section can ensure a more stable fit.

The connection relationship is: the displacement output shaft 1 is set on the large diameter part of the mechanism casing 3, and can slide along the axial direction of the mechanism casing 3 or rotate around the axis of the mechanism casing 3, and the limit pin 2 is inserted in the mechanism casing 3. In the limit groove, it is installed in the installation hole 13 of the displacement output shaft 1 at the same time. The screw rod 4 is installed on the small diameter part of the mechanism housing 3, and the two symmetrical lugs of the screw rod 4 are installed on the In the groove 11, the axial sliding of the screw rod 4 is guided, and the spiral rib of the screw rod 4 forms a spiral motion assembly relationship with the spiral groove 12 of the displacement output shaft 1. The internal thread of the screw rod 4 and the external thread of the screw rod 5 Fitting connection, the bearing 6 is located between the screw rod 5 and the coupling 7, which defines the axial and radial degrees of freedom of the screw rod 5, and the screw rod 5 is connected with the rotating shaft of the rotating drive element 8 through the coupling 7, and the rotation The driving element 8 is fixedly connected to one end of the mechanism casing 3 through a connecting flange, and the other end of the mechanism casing 3 is connected to other devices through a connecting flange.

A compound motion mechanism, the working principle of which is:

When the screw rod 5 is rotated and driven by a rotating drive element 8 such as a motor, the screw rod 5 will drive the screw rod 4 to perform linear motion, and the helical tendon of the screw rod 4 and the helical groove 12 of the displacement output shaft 1 form a helical motion pair to limit the position. The pin 2 is inserted in the limit groove of the mechanism housing 3, and at the same time, the limit pin 2 is installed in the mounting hole 13 of the displacement output shaft 1, so that the limit pin 2 limits the movement of the displacement output shaft 1 along the mechanism housing 3. The orientation movement of the slot.

When the direction of the limit groove of the mechanism housing 3 is parallel to the axis of the output shaft, as shown in 9 in Figure 5, the limit pin 2 will limit the rotational freedom of the displacement output shaft 1, so that the displacement output shaft 1 and the screw rods 4 perform overall linear motion along their axial directions to ensure that there will be no relative motion between the screw rod 4 and the displacement output shaft 1, so the displacement output shaft 1 can only perform axial linear displacement, as shown in Figure 8 a shown.

When the direction of the limit groove of the mechanism housing 3 is an arc of rotation around the axis of the displacement output shaft 1, as shown at 10 in Figure 5, the limit pin 2 will limit the linear motion freedom of the displacement output shaft 1 , the helical ribs of the screw rod 4 will move relatively in the helical groove 12 of the displacement output shaft 1, so that the displacement output shaft 1 will rotate around the axis of the mechanism housing 3, and the displacement output shaft 1 will output Rotational displacement, as shown in b in Figure 8.

When the direction of the limit groove of the mechanism housing 3 is a combination of a straight line parallel to the axis of the displacement output shaft 1 and an arc of rotation around the axis of the displacement output shaft 1, the limit pin 2 will make the displacement output shaft 1 Both the linear displacement and the rotational angular displacement are output, as shown in c in Fig. 8 .

When changing the length value of the straight line section and the radian value of the arc section of the limit groove on the mechanism housing 3, the displacement output shaft 1 will output the corresponding linear displacement value and rotation angle displacement value, and change the position on the mechanism housing 3. The number and combination sequence of the straight line segment and the rotation segment of the limiting groove will make the displacement output shaft 1 output the displacement of the corresponding combination sequence of linear displacement and rotational displacement, as shown in d in Figure 8, the direction of the limiting groove is the axial spiral of the displacement output shaft 1, and the displacement output shaft 1 outputs a schematic diagram of spiral displacement around the axis.

The composite motion mechanism has been applied to the lunar sample packaging device of the lunar exploration project.

Claims (3)

1. A composite kinematic mechanism, characterized in that it comprises a displacement output shaft (1), a stop pin (2), a mechanism housing (3), a screw rod (4), a screw mandrel (5), a bearing (6) ), a shaft coupling (7), and a rotary drive element (8), wherein radial mounting holes are processed on the outer circumference of the displacement output shaft (1), spiral grooves are processed on the inner surface, and the mechanism housing (3) is hollow The cylindrical structure has two axisymmetric axial grooves processed on the inner surface, and connecting flanges are respectively processed on the outer circumference of the two ends of the cylinder. The hollow part of the cylinder is divided into a small diameter part and a large diameter part. Limiting grooves are partly processed, the screw rod (4) is a hollow cylindrical structure, an annular boss is processed on the outer circumference of one end, two radially extending symmetrical lugs are processed on the boss, and convex holes are processed on the outer surface. The spiral ribs are raised, the inner surface is processed with threads, the screw rod (5) is a cylindrical structure, the outer surface is processed with threads, and the outer circumference of one end of the rotating drive element (8) is processed with a connecting flange; the displacement output shaft (1) is set In the large diameter part of the mechanism housing (3), it can slide along the axial direction of the mechanism housing (3) or rotate around the axis of the mechanism housing (3), and the limit pin (2) is inserted in the mechanism housing (3) and installed in the installation hole of the displacement output shaft (1), the screw rod (4) is installed in the small diameter part of the mechanism housing (3), and the two symmetrical ears of the screw rod (4) The sheet is installed in the groove of the mechanism housing (3) to guide the axial sliding of the screw rod (4), and the spiral rib of the screw rod (4) forms a spiral motion assembly relationship with the spiral groove of the displacement output shaft (1) , the internal thread of the screw rod (4) is connected with the external thread of the screw rod (5), the bearing (6) is located between the screw rod (5) and the coupling (7), and the screw rod (5) passes through the coupling (7) is connected with the rotating shaft of the rotary drive element (8), and the rotary drive element (8) is fixedly connected with one end of the mechanism housing (3) through a connecting flange. 2. A compound kinematic mechanism as claimed in claim 1, characterized in that, the direction of the limiting groove is a straight line or an arc or a combination of the above two forms, the length of the straight line and the length of the arc The radian and the combination order of the two forms are set and combined according to specific output requirements. 3. A compound kinematic mechanism as claimed in claim 1, characterized in that the helical groove on the inner surface of the displacement output shaft (1) is partially or completely processed, and the thread on the inner surface of the screw rod (4) is partially or completely processed. whole paragraph.