Micro motor riveting assembly device

Abstract

The utility model belongs to the field of micro motor riveting assembly devices, which comprises a lower stamping assembly moving downwards and an elastic supporting assembly supporting a micro motor, the elastic supporting assembly is used for supporting the micro motor and can move up and down, and a lateral stamping assembly is arranged on the periphery of the elastic supporting assembly and used for riveting the micro motor from the lateral direction. The lower stamping assembly controls the lateral stamping assembly to move to achieve the stamping effect, the elastic supporting assembly elastically supports the micro motor, and a motor shell is protected. According to the technical scheme, a new structure is adopted, a direct stamping mode from top to bottom is avoided, and the situation that the shell of the motor deforms due to the fact that pressure in the vertical direction is too large is prevented. And the punching action in the horizontal direction is adopted, so that the size of the motor shell is kept stable. Meanwhile, the motor is protected through the elastic supporting assembly and cannot move in the horizontal direction.

Description

Technical Field

[0001] The utility model relates to a micro motor assembly device, in particular to a micro motor riveting assembly device. Background Art

[0002] During the manufacturing process of micro motors, the motor cover needs to be pressed onto the motor housing to protect the rotor, stator and gear set inside the housing (refer to Figure 1 , 2 In order to achieve this goal, a concave edge is designed on the cover plate, and the motor housing is punched by a stamping machine, causing the housing to deform at the concave edge position, and the cover plate and the housing are pressed into one piece (reference Figure 3 ).

[0003] In the prior art, a punch press is generally used to punch the edge of the shell from top to bottom, so that the edge of the shell is deformed, thereby achieving the purpose of riveting. However, in the actual production process, the following problems are found, resulting in a high defect rate. 1. If the downward pressure and stroke of the punch die are large, the motor shell will be deformed (especially if the operator does not accurately position the placement height of the motor). Because the motor shell is a concave cavity structure with an opening on the top, it is subjected to excessive force, causing it to slightly change into a drum shape (thereby causing the motor's external dimensions to change and the height to decrease), causing the internal stator to be squeezed and deformed, affecting the torque of the motor. In addition, there is also a phenomenon of squeezing and deforming the gear set, which causes the transmission system to fail. 2. If the pressure and stroke are small, the cover plate and the shell will not fit tightly, and then loosen, affecting the stability of the motor. At the same time, the gear set will shake, causing loud noise. Because of the above two reasons, the defect rate is high and the performance of the motor is not stable enough.

[0004] In order to solve the above problems, a new technical solution is needed to change the direction of stamping to avoid excessive pressure on the motor housing, thereby causing deformation, so as to improve the qualification rate of motor products. Utility Model Content

[0005] The purpose of the utility model is to solve the above defects and provide a micro motor riveting assembly device, which solves the problems existing in the background technology by changing the stamping direction of the motor housing.

[0006] The purpose of the utility model is achieved by the following methods:

[0007] A micro motor riveting assembly device includes a lower stamping component that moves downward, an elastic support component that supports the micro motor, the elastic support component is used to support the micro motor and can move up and down, a lateral stamping component is provided on the periphery of the elastic support component, which is used to rivet the micro motor from the side, the lower stamping component controls the movement of the lateral stamping component to achieve the stamping effect, and the elastic support component elastically supports the micro motor and protects the motor housing. This technical solution adopts a new structure to avoid direct stamping from top to bottom, and prevents the motor housing from being deformed due to excessive vertical pressure. Instead, a horizontal stamping action is adopted to keep the motor housing stable in size. At the same time, the elastic support component is used to protect the motor so that it does not move in the horizontal direction.

[0008] Furthermore, the elastic support assembly includes a support seat, a push rod, a support spring, a limit sleeve and a support shell. The support seat is arranged above the push rod, a limit sleeve is provided in the middle of the push rod, and the push rod is arranged in the support shell. The support shell is a U-shaped structure. A through hole is provided on the bottom plane of the support shell, and the lower end of the push rod passes through the through hole. A support spring is provided between the lower end of the push rod and the support shell.

[0009] Furthermore, the outer shape of the support seat is an arc-shaped structure larger than a semicircle, and its size corresponds to the size of the motor housing.

[0010] Furthermore, a protection block is provided above the support seat to protect the motor.

[0011] Furthermore, four symmetrical avoidance positions are provided on the edge of the support seat.

[0012] Furthermore, the lateral stamping assembly includes a mounting plate, a stamping part, a pushing part and a lateral return spring, wherein the stamping part, the pushing part and the lateral return spring are arranged in the mounting plate, the pushing part is in direct contact with the stamping part and pushes the stamping part to move in the horizontal direction, and the return spring pushes the stamping part to return.

[0013] Furthermore, the stamping part has an L-shaped structure, and the front end is used for the housing of the stamping motor. One end of the reset spring is in conflict with the mounting plate, and the other end is in conflict with the tail of the stamping part to form a reset force. The contact surface between the stamping part and the pushing part is an inclined surface, and the inclination direction of the inclined surface is that the upper part is toward the center of the mounting plate, and the lower part is away from the center of the mounting plate. When the pushing part moves downward, the stamping part realizes horizontal movement.

[0014] Furthermore, a through hole is provided on the mounting plate to form a space for the pusher to move up and down.

[0015] Furthermore, the inclined surface is inclined in a direction that the upper portion is toward the center of the mounting plate, and the lower portion is away from the center of the mounting plate.

[0016] Furthermore, the lower stamping assembly includes a bracket and a stamping cylinder arranged at the top of the bracket, a stamping rod is provided at the lower end of the stamping cylinder, and a top plate, a connecting plate, a motor push plate and a motor downward pressure head are provided at the lower end of the stamping rod in sequence, and pushing rods are provided in all directions around the lower end of the top plate for pushing the lateral stamping assembly, and a downward pressure spring is provided between the top plate and the motor push plate for providing a double stroke.

[0017] The beneficial effects of the utility model are: by changing the direction of stamping, the motor housing is riveted on the cover plate, so that the two are combined, and stamping is performed simultaneously from symmetrical directions, so that the motor is evenly and balancedly stressed, and the stability of the motor is maintained, thereby avoiding unidirectional stress on the motor housing. At the same time, the motor is raised and lowered by the elastic support component, so as to protect the motor housing. In addition, by pushing down the two strokes, the motor is protected first and then stamped, so as to achieve the purpose of both good riveting and preventing the motor housing from deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a schematic diagram of the three-dimensional structure of the micro motor;

[0019] Attached Figure 2 This is a schematic diagram of the micro motor's exploded structure;

[0020] Attached Figure 3 This is a schematic diagram of the three-dimensional structure of the micro motor after riveting;

[0021] Attached Figure 4 is a schematic diagram of the three-dimensional structure of this embodiment;

[0022] Attached Figure 5 It is a schematic diagram of the decomposed structure of this embodiment;

[0023] Attached Figure 6 This is a schematic diagram of the lower stamping assembly of this embodiment;

[0024] Attached Figure 7 This is a schematic diagram of the exploded lower stamping assembly of this embodiment;

[0025] Attached Figure 8 This is a schematic diagram of the elastic support assembly of this embodiment;

[0026] Attached Fig. 9 This is a schematic diagram of the exploded lower stamping assembly of this embodiment;

[0027] Attached Fig.10 It is a partial schematic diagram of the lower stamping component;

[0028] Attached Fig.11 This is a schematic diagram of the side punching assembly of this embodiment;

[0029] Attached Fig.12 This is a schematic diagram of the exploded side punching assembly of this embodiment;

[0030] Attached Fig.13 Schematic diagram of stamping parts and push parts

[0031] Attached Fig.14 This is a cross-sectional view of the stamping part and the push part after they are matched.

[0032] Attached Fig.15 This is a cross-sectional view of the side punching assembly of this embodiment

[0033] In the figure, 1. lower stamping assembly, 101. bracket, 102. stamping cylinder, 103. stamping rod, 104. top plate, 105. connecting plate, 106. motor push plate, 107. motor lower pressure head, 108. push rod, 109. pressure spring, 2. elastic support assembly, 201. support seat, 202. push rod, 203. support spring, 204. limit sleeve, 205. shell, 206. protection block, 207. avoidance position, 208. base plate, 3. lateral stamping assembly, 301. mounting plate, 302. stamping part, 303. push part, 304. lateral return spring, 305. inclined surface, 306. pad, 4. micro motor, 401. circular shell, 402. cover plate, 403. recessed edge, 404. gear assembly. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] For ease of understanding, the present invention is now described in further detail in conjunction with specific implementation cases, but this is not intended to limit the present invention.

[0036] (refer to Figure 4 , 5) This implementation case mainly consists of three parts: a lower stamping component 1, an elastic support component 2 and a lateral stamping component 3, wherein the lower stamping component 1 provides a downward impact, the elastic support component 2 mainly provides support and protection for the micro motor 4, and the lateral stamping component 3 mainly performs lateral stamping on the micro motor 4 to achieve stamping and riveting of the cover plate 402 and the circular shell 401.

[0037] The riveting device will now be described in detail according to its structure.

[0038] (refer to Figure 4, 5, 6, 7, 8) The lower stamping assembly 1 includes a stamping cylinder 102, a bracket 101, a stamping rod 103 and a top plate 104, a connecting plate 106, etc. The above components are mounted on the bracket 101 by screws, and the stamping rod 103 is arranged on the stamping cylinder 102. When the stamping cylinder 102 is working, the stamping rod 103 moves downward, and the stamping rod 103 and the top plate 104 are fixed by screws. The top plate 104 slides through the two guide rods on the rear of the bracket 101, and the top plate 104 moves downward synchronously with the stamping rod 103, and the top plate 104 moves up and down along the guide rods.

[0039] (refer to Figure 7 , 8 ) A connecting plate 105 is provided below the top plate 104. Four push rods 108 are provided at the four corners of the connecting plate 105 and have the same height. The two are fixedly connected by screws so that the push rods 108, the top plate 104 and the connecting plate 105 can move synchronously. A motor push plate 106 is provided below the connecting plate 105. A motor pressing head 107 is fixedly provided in the middle of the motor push plate 106. Four through holes are also provided around the motor push plate 106 for the push rods 108 to pass through the motor push plate 106. The downward height of the motor pressing head 107 is greater than the push rod 108, and the height difference between the two is the height of the motor 4. A pressing spring 109 and a spring limiting plate are provided between the motor push plate 106 and the top plate 104. The spring limiting plate is provided with a through hole at the corresponding position. The fixed pressing spring 109 is installed in the through hole to prevent the pressing spring 109 from deflecting.

[0040] (refer to Fig. 9 , 10 ) Right below the motor push plate 106 is the elastic support assembly 2, which includes a support seat 201, a push rod 202, a support spring 203, a limit sleeve 204 and other components, wherein the support seat 201 is arranged at the top and directly opposite to the motor push plate 106, and a space is left between the support seat 201 and the motor push plate 106, so that the manipulator or the human hand can place the motor 4 on the support seat 201. A through hole of a corresponding shape is left at the corresponding position of the support seat 201, for the protection block 206 and the four pushers 303 to pass through, and they can all slide up and down in the through hole.

[0041] (refer to Fig.10 , 11) The protection block 206 is a circular structure at the bottom, and a vertical block-shaped protection structure is provided on the side. The circular structure corresponds to the size of the motor 4, can support the motor 4, and the motor 4 and the protection block 206 move up and down together. The height of the protection structure is consistent with the height of the motor 4, and is used to protect the motor 4. A push rod 202 is provided at the bottom of the protection block 206. The push rod 202 is arranged in the shell 205, and the upper end of the push rod 202 and the protection block 206 are fixedly connected by screws. The lower end passes through the through hole at the bottom of the shell 205, and a raised annular limiting sleeve 204 is formed in the middle of the push rod 202. A support spring 203 is provided between the limiting sleeve 204 of the push rod 202 and the shell 205, and the protection block 206 can be reset upward by the support spring 203. The upper end of the shell 205 is fixed to the bottom of the base plate 208 by screws. A through hole is provided at the bottom of the base plate 208 for the push rod 202 to pass through and slide up and down. The lower end of the limiting sleeve 204 abuts against the support spring 203 , and the upper end abuts against the base plate 208 , thereby achieving the limiting purpose.

[0042] (refer to Fig.11 , 12 ) The lateral stamping assembly 3 includes a mounting plate 301, a stamping part 302 and a pusher 303. The mounting plate 301 is located directly below the support seat 201. The mounting plate 301 is provided with a through-hole-shaped mounting hole for mounting corresponding components. The protection block 206 passes through the through-hole in the middle of the mounting plate 301. The stamping part 302, the lateral return spring 304 and the pusher 303 are respectively installed at corresponding positions on the mounting plate 301. The head of the stamping part 302 corresponds to the avoidance position 207 facing the protection block 206, and the tail of the stamping part 302 is in contact with the pusher 303. (Refer to Fig.13 , 14 ) The contact surface between the two is an inclined surface 305, and the inclined direction of the inclined surface 305 is that the upper part faces the protection block 206, and the lower part is away from the protection block 206. The stamping part 302 is an L-shaped structure, and the front end head is used to stamp the housing of the motor. One end of the reset spring 304 is in conflict with the mounting plate 301, and the other end is in conflict with the tail of the stamping part 302, thereby forming a reset, and the stamping part 302 is restored to its original position by elastic force. A pad 306 is also provided at the bottom of the mounting plate 301 to support the components in the above-mentioned mounting hole. The upper end head of the pusher 303 is exposed to the upper surface of the support seat 201. (Refer to Fig.15 ) A stud is provided at the lower end of the push member 303, and the stud passes through the backing plate 306 and the push member 303 to be threadedly locked. The head of the stud is stuck in the hole of the backing plate 306 to limit the push member 303.

[0043] The following is a further description of the operation of the riveting assembly device:

[0044] The application purpose of this embodiment is to perform riveting on the micro motor 4. First, the circular housing 401 assembled with the stator, rotor and gear assembly 404 is covered with a cover plate 402. Then, the cover plate 402 is prepared to be riveted on the circular housing 401. The recessed edge 403 has been punched on the cover plate 402. It is only necessary to rivet the edge of the housing into the recessed edge 403 at the recessed edge 403 (refer to Figure 1 , 2, 3). The assembly and feeding steps are the pre-steps of this embodiment and will not be described in detail here. Only the riveting step of the micro motor 4 will be described.

[0045] During operation, the micro motor is generally placed on the lower circular structure of the protection block 206 by a manipulator, a conveyor belt or a human hand. The punching cylinder 102 is started, causing the punching rod 103 to move downward, thereby driving the top plate 104, the connecting plate 105, the motor push plate 106, the motor pressing head 107, the push rod 108, etc. to move downward together. Because the downward length of the motor pressing head 107 is longer than the downward length of the push rod 108, and it is the height difference of a micro motor 4. Therefore, the motor pressing head 107 touches the cover plate 402 first, and at this time the punching rod 103 continues to move downward, which will continue to apply downward pressure to the micro motor, and then the protection block 206 begins to be forced downward and begins to press the push rod 202, and the push rod 202 moves downward along the shell 205. Then the micro motor 4 and the protection block 206 sink into the support seat 201 together. When the sinking distance reaches a height difference of a micro motor 4, the protection block 206 sinks to the upper surface of the base plate 208 and stops moving downward, reaching the predetermined position. At this time, the punching rod 103 continues to press downward, and because of the presence of the pressing spring 109, the downward force is absorbed, so that the motor pressing head 107 connected to the motor push plate 106 does not exert too much pressure on the micro motor. Because the push rod 108 is directly fixedly connected to the top plate 104, it will continue to move downward and start to contact the pusher 303, thereby achieving a double stroke.

[0046] When the top of the pusher 303 is pressed by the push rod 108, because the pusher 303 and the stamping part 302 are in contact with each other at an inclined surface, the stamping part 302 is pushed to move horizontally, and a stamping force is applied to the circular shell 401, breaking the edge of the circular shell 401 and pressing against the concave edge 403 of the cover plate 402, thereby riveting the circular shell 401 and the cover plate 402 together. Because there are four components in the set and they are symmetrical in direction, an average force toward the center is formed, the motor shell will not be deformed, and the components inside it can be protected to be stable.

[0047] After the stamping is completed, the stamping rod 103 is lifted upward, driving the relevant parts of the lower stamping assembly 1 to move upward. First, after the downward pressure of the push rod 108 disappears, the stamping part 302 moves outward under the elastic force of the lateral reset spring 304, ready to reset, and the pusher 303 resets upward under the action of the inclined surface 305. At this time, because the downward pressure spring 109 continues to apply elastic force, the motor push plate 106 and the motor downward pressure head 107 will remain stationary. Until the rising height difference is greater than the height of a micro motor 4, the motor push plate 106 and the motor downward pressure head 107 will move upward. At the same time, under the elastic support of the support spring 203, the protection block 206 and the micro motor 4 are lifted upward, because at this time the protection block 206 and the micro motor 4 are clamped between the motor downward pressure head 107 and the push rod 202, so that the motor rises very stably and reliably, and the stop position is accurate, which is convenient for the robot to carry it later. When the motor downward pressure head 107 and the micro motor are completely separated, a complete riveting process is realized.

[0048] In order to further protect the riveting assembly device in the embodiment, an avoidance position 207 is provided on the protection block 206 corresponding to the position of the stamping head of the stamping part 302. The depth of the avoidance position 207 is greater than the movement stroke of the head of the stamping part 302. This design is to avoid accidents. For example, when an automated clamping device such as a manipulator or a conveyor clamp makes an error and fails to clamp the micro motor 4 to the protection block 206, an empty material phenomenon is generated. At this time, because there is no micro motor 4 below the motor pressure head 107, there is no external force to push the protection block 206 to move downward. At this time, if the stamping part 302 is pressed toward the middle by force, its head will directly press the surrounding of the protection block 206, thereby causing damage to the device.

[0049] This embodiment has been tested effectively, because it is stamped simultaneously from four symmetrical directions, the force is evenly applied, and no adverse effects are caused to the stator and gear components inside the motor housing, which significantly increases the qualified rate of the motor.

[0050] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as the protection scope of the present invention.

Claims

1. A micro motor riveting assembly device, comprising a lower punching assembly moving downward and an elastic support assembly supporting the micro motor, characterized in that: The elastic support component is used to support the micro motor and can move up and down. A lateral stamping component is provided on the periphery of the elastic support component for riveting the micro motor from the side. The lower stamping component controls the movement of the lateral stamping component to achieve the stamping effect. The elastic support component provides elastic support for the micro motor and protects the motor casing.

2. The micro motor riveting assembly device according to claim 1, characterized in that: The elastic support assembly includes a support seat, a push rod, a support spring, a limit sleeve and a support shell. The support seat is arranged above the push rod, a limit sleeve is provided in the middle of the push rod, and the push rod is arranged in the support shell. The support shell is a U-shaped structure. A through hole is provided on the bottom plane of the support shell, and the lower end of the push rod passes through the through hole. A support spring is provided between the lower end of the push rod and the support shell.

3. The micro motor riveting assembly device according to claim 2 is characterized in that: The outer shape of the support seat is an arc structure larger than a semicircle, and its size corresponds to the size of the outer shell of the motor.

4. The micro motor riveting assembly device according to claim 2, characterized in that: A protective block is provided above the support seat to protect the motor.

5. The micro motor riveting assembly device according to claim 2, characterized in that: The edge of the support seat is provided with four symmetrical avoidance positions.

6. The micro motor riveting assembly device according to claim 1, characterized in that: The lateral stamping assembly includes a mounting plate, a stamping part, a pushing part and a lateral return spring, wherein the stamping part, the pushing part and the lateral return spring are arranged in the mounting plate, the pushing part is in direct contact with the stamping part and pushes the stamping part to move in the horizontal direction, and the return spring pushes the stamping part to return.

7. The micro motor riveting assembly device according to claim 6, characterized in that: The stamping part has an L-shaped structure, and the front end is used for the housing of the stamping motor. One end of the reset spring is in conflict with the mounting plate, and the other end is in conflict with the tail of the stamping part to form a reset force. The contact surface between the stamping part and the pusher is an inclined surface, and the inclination direction of the inclined surface is that the upper part is toward the center of the mounting plate, and the lower part is away from the center of the mounting plate. When the pusher moves downward, the stamping part realizes horizontal movement.

8. The micro motor riveting assembly device according to claim 6, characterized in that: The mounting plate is provided with a through hole to form a space for the pusher to move up and down.

9. The micro motor riveting assembly device according to claim 6, characterized in that: The mounting plate is also provided with a through hole for the protection block to pass through.

10. The micro motor riveting assembly device according to claim 1, characterized in that: The lower stamping assembly includes a bracket and a stamping cylinder arranged at the top of the bracket. A stamping rod is provided at the lower end of the stamping cylinder. A top plate, a connecting plate, a motor push plate and a motor pressing head are provided at the lower end of the stamping rod in sequence. Push rods are provided in all directions around the lower end of the top plate for pushing the lateral stamping assembly. A pressing spring is provided between the top plate and the motor push plate for providing a double stroke.

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