CN116550583A - A linear vibrator - Google Patents

Abstract

The invention relates to a linear vibration exciter, which comprises a cylinder body, a stator assembly arranged on the cylinder body, a rotor assembly arranged on the cylinder body, a vibration exciting rod arranged on the rotor assembly and a table top arranged on the vibration exciting rod, wherein a magnetic force matching assembly is arranged between the stator assembly and the rotor assembly and comprises at least one groove and at least one lug inserted into the groove, the number of the grooves is the same as that of the lugs, one lug is inserted into each groove, the grooves and the lugs are both provided with magnetism, and each lug reciprocates in a magnetic field of the corresponding groove to drive the vibration exciting rod and the table top to vibrate. The invention adopts the mode of matching the convex blocks and the grooves to realize the relative movement of the stator component and the rotor component, and the number of the convex blocks and the grooves is increased or decreased to realize the increase or decrease of the vibration thrust of the exciting rod, so that the whole structure is kept compact while the vibration thrust is increased.

Description

A linear vibrator

technical field

The invention relates to the technical field of mechanical vibration, in particular to a linear vibrator.

Background technique

The exciter is a device attached to some machinery and equipment to generate excitation force, and is an important part of using mechanical vibration. The vibrator can make the excited object obtain a certain form and size of vibration, so as to perform vibration and strength tests on the object, or to calibrate vibration testing instruments and sensors. The vibrator can also be used as an exciting part to form a vibrating machine to realize the conveying, screening, compacting, forming and tamping of soil and gravel for materials or objects. According to the different excitation types, the vibrator is divided into inertial electric type, electromagnetic type, electro-hydraulic type, pneumatic type and hydraulic type.

The basic principle of the electromagnetic exciter in the prior art is: the permanent magnet is located in the center of the exciter shell, a uniform magnetic field will be formed in the cavity between the two, the moving coil winding is located inside the cavity, and the plate spring and The shells of the exciter are connected, the lower end of the ejector rod of the exciter is fixed on the upper center of the moving coil winding drum, and the upper end of the ejector rod is fixedly connected with the structure to be excited. During normal operation, the changing current is passed into the moving coil, and the moving coil winding drum is affected by the changing electromagnetic excitation force to drive the ejector rod to reciprocate, thereby generating an exciting force on the excited object, but in the process of use, with the use time The growth of the mover tends to cause deflection of movement and insufficient vibration thrust; if the vibration thrust is to be increased, it is necessary to increase the size of the permanent magnet and increase the overall volume.

Therefore, it is necessary to provide a linear vibrator with a compact structure, good guiding performance, and a large load-bearing capacity.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a linear vibrator.

Technical solution of the present invention is as follows:

A linear vibrator, comprising a cylinder body, a stator assembly arranged on the cylinder body, a mover assembly arranged on the cylinder body, an excitation rod arranged on the mover assembly, and a table arranged on the excitation rod , a magnetic force fitting assembly is provided between the stator assembly and the mover assembly, the magnetic force fitting assembly includes at least one groove and at least one protrusion inserted into the groove, the groove and the protrusion The number of blocks is the same, and one of the bumps is inserted into each of the grooves, and both the grooves and the bumps are magnetic, and each of the bumps is carried out in the magnetic field of the corresponding groove. The reciprocating motion drives the vibrating rod and the table to vibrate.

As a further improvement of the present invention, the protrusion is arranged on the mover assembly, and the groove is arranged on the stator assembly.

As a further improvement of the present invention, the groove is formed by a plurality of pairs of permanent magnets arranged on the stator assembly.

As a further improvement of the present invention, the stator assembly includes a stator bracket arranged on the cylinder, and the pair of permanent magnets is arranged on the stator bracket.

As a further improvement of the present invention, the mover assembly includes a bearing part arranged on the cylinder body and a movable mover base, the bearing part has elasticity, and the mover base floats on the bearing part , the bump and the exciting rod are arranged on the mover seat.

As a further improvement of the present invention, the bearing part includes an air spring seat arranged on the cylinder body and an air spring arranged on the air spring seat.

As a further improvement of the present invention, a guide component is provided between the mover seat and the cylinder body.

As a further improvement of the present invention, the guide member includes a guide rod with one end disposed on the cylinder body and a guide hole disposed on the mover base, and the guide rod cooperates with the guide hole.

As a further improvement of the present invention, the linear vibrator further includes an over-displacement protection component for limiting the movement of the mover assembly.

As a further improvement of the present invention, the over-displacement protection component includes an over-displacement sensor provided on the stator assembly and a baffle provided on the mover assembly.

According to the present invention of above-mentioned scheme, the beneficial effect of the present invention is:

The invention provides a linear vibration exciter, the stator assembly and the mover assembly adopt the way of the protrusion and the groove to carry out relative movement, and the vibration thrust of the excitation rod can be increased or decreased by increasing or decreasing the number of the protrusion and the groove , while increasing the vibration thrust, the overall structure is kept compact.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural sectional view of the present invention;

Fig. 3 is a structural schematic diagram of the first internal angle of the present invention;

Fig. 4 is a schematic structural diagram of the second internal angle of the present invention.

In the figure: 1. Cylinder body; 2. Exciting rod; 3. Table top; 41. Groove; 42. Protrusion; 43. Opposite rows of permanent magnets; 5. Stator bracket; 6. Movers seat; 71. Air spring Seat; 72, air spring; 81, guide rod; 82, guide hole; 91, over-displacement sensor; 92, baffle plate.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

Referring to Figures 1-4, the present invention provides a linear vibrator, including a cylinder body 1, a stator assembly disposed on the cylinder body 1, a mover assembly disposed on the cylinder body 1, a mover assembly disposed on the The excitation rod 2 and the table top 3 arranged on the excitation rod 2, a magnetic force fitting assembly is provided between the stator assembly and the mover assembly, and the magnetic force fitting assembly includes at least one groove 41 and at least one protrusion inserted into the groove 41 42, the number of grooves 41 and bumps 42 is the same, and a bump 42 is inserted into each groove 41, and both grooves 41 and bumps 42 are magnetic; relative to the groove 41, each bump 42 is in the corresponding The reciprocating motion in the magnetic field of the groove 41 drives the vibrating rod 2 to vibrate with the table top 3; Requirements, by increasing or reducing the number of bumps 42 and grooves 41, the increase or decrease of the vibration thrust of the vibrating rod 2 can be realized, which can effectively overcome the need to increase the overall equipment in order to increase the vibration thrust in conventional vibrators The problem of volume is to keep the overall structure compact while increasing the vibration thrust.

Preferably, there are no special restrictions on the setting positions of the protrusions 42 and the grooves 41, which can be changed or replaced according to usage requirements. There are two setting methods:

Mode 1: the bump 42 is set on the mover assembly, and the groove 41 is set on the stator assembly; the bump 42 reciprocates under the action of magnetic force to provide the power for the mover assembly, the exciting rod 2 and the table 3 to vibrate ; The groove 41 remains relatively stationary with the cylinder body 1;

Mode 2: the bump 42 is set on the stator assembly, and the groove 41 is set on the mover assembly; the bump 42 and the cylinder body 1 remain relatively stationary; the groove 41 reciprocates under the action of the magnetic force, providing the mover assembly, The power to vibrate the vibrating rod 2 and the table top 3 .

Preferably, the present invention provides an embodiment of mode one, that is, the protrusion 42 is disposed on the mover assembly, and the groove 41 is disposed on the stator assembly. The mover assembly includes a bearing part arranged on the cylinder body 1 and a movable mover base 6. The bearing part is elastic, and the mover base 6 floats on the bearing part. The bump 42 and the exciting rod 2 are arranged on the mover base. 6, when one of the groove 41 and the protrusion 42 is non-magnetic or both are non-magnetic, the magnetic force between the two disappears, and the mover base 6 naturally falls on the bearing part due to its own gravity. The components are elastic, which can provide proper cushioning of the mover seat 6, avoiding hard contact between the mover seat 6 and the bearing parts, resulting in damage to the mover seat 6 or the bearing parts, and providing safety; the stator assembly includes a The stator bracket 5 on the top is provided with several pairs of permanent magnets 43 on the stator bracket 5, and the groove 41 is formed by the pair of permanent magnets 43, because the groove 41 that remains relatively stationary with the cylinder body 1 is composed of the pair of permanent magnets 43. Therefore, the groove 41 does not need to be energized to be magnetic, and can provide a stable magnetic field. When working, it is only necessary to provide the required power to the moving bump 42 to make it magnetic, so that the bump 42 can be aligned in the opposite row. The magnetic field generated by the permanent magnet 43 reciprocates, thereby driving the exciting rod 2 and the table 3 to vibrate; the magnetic fields generated by each groove 41 do not interfere with each other, and each bump 42 reciprocates in the corresponding groove 41 Thrust is generated, and the thrust generated by each bump 42 is relatively independent; the thrust of the mover assembly on the excitation rod 2 and the table 3 is superimposed by the thrust generated by all the bumps 42, that is, the vibration thrust is equal to that generated by all the bumps 42 The sum of the thrust, so the number of grooves 41 and protrusions 42 determines the magnitude of the vibration thrust generated by the vibrator as a whole.

Preferably, the shape of the cylinder body 1 is not particularly limited, that is, the cylinder body 1 can adopt any suitable shape, such as a common cylindrical shape, a conical shape, a square shape or a rectangle shape, or a spherical shape, a trapezoidal shape, a rhombus shape, etc., which are not commonly used. Any other irregular shape can also be adopted.

Preferably, the overall structure of the linear vibrator of the present invention adopts a symmetrical structure, and the cylinder body 1 is not rectangular as an example for illustration, that is, the excitation rod 2, the stator assembly and the mover assembly are arranged in the length and width directions of the cylinder body 1. Both adopt a symmetrical structure, which can maintain the uniformity of the overall force in the length and width directions, avoid the phenomenon of movement deviation caused by uneven force, and improve the overall stability. Therefore, the excitation rod 2 is located in the center of the overall structure There are no special restrictions on the location, arrangement of the stator assembly and the mover assembly, so the arrangement of the stator assembly and the mover assembly can take the following two forms:

Form 1: the mover assembly is set in the middle, and the stator assembly is set around the mover assembly;

Form 2: The stator assembly is set in the middle, and the mover assembly is set around the stator assembly;

The magnetic force fitting components are arranged symmetrically between the mover component and the stator component. The long direction of the cylinder body 1 is defined as left and right, and the width direction of the cylinder body 1 is defined as front and rear. 2. Ensuring that the front, rear, left, and right sides are symmetrical, can ensure that the excitation rod 2 is evenly stressed in all directions, and help to improve the stability of the reciprocating motion of the mover assembly.

Preferably, the load-bearing part includes an air spring seat 71 arranged on the cylinder body 1 and an air spring 72 arranged on the air spring seat 71. When the mover seat 6 presses the air spring 72, the air spring 72 acts against the mover seat 6. Provide an upward thrust. When the mover base 6 stretches the air spring 72, the air spring 72 provides a downward pull to the mover base 6, which can provide effective buffering when the mover base 6 reciprocates. When the mover seat 6 is at a low position, it can prevent the mover seat 6 from colliding with the bearing parts below, causing damage, improving the overall safety, and can prevent the mover seat 6 from over-displacement when the mover seat 6 is at a high position. Phenomenon, improve the overall stability.

Preferably, a guide part is provided between the mover seat 6 and the cylinder body 1 to avoid the abnormal phenomenon of deviation of the mover assembly during the movement process. The guide part can adopt various structures without specific restrictions:

Structure 1: The guide component includes a guide rod 81 with one end arranged on the cylinder body 1 and a guide hole 82 arranged on the mover seat 6. The guide rod 81 matches the guide hole 82, and the Equipped with a shaft sleeve, which can improve the guiding performance;

Structure 2: The guide part includes a guide rail arranged on the cylinder body 1 at one end and a slider arranged on the mover seat 6, and the guide rail and the slider are matched; the guide rail can also be arranged on the mover seat 6, and the slider is arranged on the on cylinder block 1.

The guide part can also adopt any other structure.

Preferably, the linear vibrator also includes an over-displacement protection component for limiting the movement of the movable subassembly. When the movable subassembly exceeds the movement limit during the movement, the over-displacement protection component can issue an alarm and stop the vibration. The over-displacement protection component It includes an over-displacement sensor 91 arranged on the stator assembly and a baffle 92 arranged on the moving sub-assembly; the over-displacement sensor can be a photoelectric sensor, a displacement sensor, or a proximity sensor.

In summary, the present invention provides a linear vibrator. The stator assembly and the mover assembly use the protrusion 42 and the groove 41 to carry out relative movement. According to the needs of use, the protrusion 42 can be increased or decreased. and the number of grooves 41, realize the increase or decrease of the vibration thrust of the vibrating rod, and keep the overall structure compact while increasing the vibration thrust; the air spring 72 can provide effective cushioning when the mover seat 6 reciprocates, improving The overall safety; the guiding part can avoid the abnormal phenomenon of deviation of the moving subassembly during the movement; when the moving subassembly exceeds the movement limit during the movement, the over-displacement protection part can issue an alarm and stop the vibration.

It should be emphasized that: the above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are valid. Still belong to the scope of the technical solution of the present invention.

Claims (10)

1. A linear vibrator, characterized in that it comprises a cylinder (1), a stator assembly arranged on the cylinder (1), a mover assembly arranged on the cylinder (1), a mover arranged on The excitation rod (2) on the assembly and the table top (3) arranged on the excitation rod (2), a magnetic force fitting assembly is provided between the stator assembly and the mover assembly, and the magnetic force fitting assembly includes at least A groove (41) and at least one protrusion (42) inserted into the groove (41), the number of the grooves (41) and the protrusions (42) is the same, each of the grooves (41) inserts a said bump (42), said groove (41) and said bump (42) all have magnetism, each said bump (42) is in corresponding said groove (41) performs reciprocating motion in the magnetic field, driving the vibration rod (2) and the table (3) to vibrate. 2. The linear vibrator according to claim 1, characterized in that, the bump (42) is arranged on the mover assembly, and the groove (41) is arranged on the stator assembly. 3. The linear vibrator according to claim 2, characterized in that, the groove (41) is formed by a plurality of pairs of permanent magnets (43) arranged on the stator assembly. 4. The linear vibrator according to claim 3, characterized in that, the stator assembly comprises a stator bracket (5) arranged on the cylinder (1), and the pair of permanent magnets (43) It is arranged on the stator support (5). 5. The linear vibrator according to claim 2, characterized in that, the mover assembly includes a bearing part and a movable mover seat (6) arranged on the cylinder (1), the mover seat (6) The bearing part has elasticity, the mover base (6) is floatingly carried on the bearing part, and the protrusion (42) and the excitation rod (2) are arranged on the mover base (6). 6. The linear vibrator according to claim 5, characterized in that, the bearing part comprises an air spring seat (71) arranged on the cylinder body (1) and an air spring seat (71) arranged on the air spring seat ( 71) on the air spring (72). 7. The linear vibrator according to claim 5, characterized in that, a guide member is provided between the mover base (6) and the cylinder (1). 8. The linear vibrator according to claim 7, characterized in that, the guide member comprises a guide rod (81) with one end arranged on the cylinder (1) and a guide rod (81) arranged on the mover seat ( 6) on the guide hole (82), the guide rod (81) is matched with the guide hole (82). 9. The linear vibrator according to claim 1, characterized in that, the linear vibrator further comprises an over-displacement protection component for limiting the movement of the mover assembly. 10. The linear vibrator according to claim 9, characterized in that, the over-displacement protection component comprises an over-displacement sensor (91) arranged on the stator assembly and an over-displacement sensor (91) arranged on the mover assembly Baffle (92).