An automated device for riveting brush holders

Abstract

The present invention relates to the technical field of brush holder installation, and particularly relates to an automatic device for riveting a brush holder. A riveting head capable of reciprocatingly moving in the vertical direction and a rotating disk located directly below the riveting head are arranged on the working plane of the machine frame. A driving source for driving the rotation of the rotating disk is provided below the working plane. A connecting shaft assembly connected to the driving source is arranged at the center of the rotating disk. A first working station for preliminarily bending the brush holder pin and a second working station for riveting the brush holder pin on the brush holder plate are arranged on the riveting head. At least one positioning seat for fixing the brush holder is arranged in the rotating disk, and the positioning seat can be rotated to the corresponding processing station along with the rotating disk. The beneficial effects of the present invention are: ensuring the riveting quality of the workpiece and improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of brush holder installation, and in particular to an automatic device for riveting a brush holder. Background Art

[0002] In a DC motor structure, a brush holder needs to be installed on a brush holder plate. The brush holder has two pins arranged front and back, and the brush holder plate has through holes for the pins to pass through. After the pins pass through the through holes, the brush holder is riveted to the brush holder plate. However, the space position on the brush holder plate for installing the brush holder is very small, which is not conducive to manual riveting by workers. Moreover, manual riveting cannot well control the riveting force. Excessive riveting force will cause the brush holder to deform, and too small riveting force will result in insecure riveting. There are situations where the riveting quality of manual riveting is uneven, and at the same time, the production efficiency is low and the operation is cumbersome. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic device for riveting a brush holder in view of the above-mentioned deficiencies of the prior art, so as to ensure the riveting quality of workpieces and improve the production efficiency.

[0004] To achieve the above object, the present invention provides the following technical solution: An automatic device for riveting a brush holder, including a frame, characterized in that: a riveting head capable of reciprocating vertically is erected on the working plane of the frame, and a rotating disk is located directly below the riveting head. A driving source for driving the rotating disk to rotate is provided below the working plane. A connecting shaft assembly connected to the driving source is provided at the center of the rotating disk. The riveting head is provided with a first station for preliminarily bending the pins of the brush holder and a second station for riveting the pins of the brush holder to the brush holder plate. At least one positioning seat for fixing the brush holder is provided in the rotating disk, and the positioning seat can be rotated to the corresponding processing station along with the rotating disk.

[0005] The present invention with the above characteristics: The brush holder is placed in the positioning seat, and the brush holder plate is placed on the brush holder. The rotating disk is sequentially rotated below the first station and the second station, and the riveting head intermittently presses down, and the straight pins of the brush holder are preliminarily bent and then riveted to the brush holder plate. By using this device, the automatic riveting of the brush holder on the brush holder plate is realized, ensuring the riveting quality of each workpiece and improving the production efficiency; multiple stations are provided in the riveting head. First, the pins of the brush holder are preliminarily bent and then completely bent to be riveted to the brush holder plate, avoiding the breakage of the pins of the brush holder caused by the one-step riveting form and ensuring the riveting quality.

[0006] A further setting of the present invention is that: the first station includes a number of first riveting components distributed according to the brush holder, the first riveting component includes two first riveting cores, a stripping rod for pre-pressing the brush holder plate is arranged between the two first riveting cores, one end of the first riveting core is fixedly connected to the riveting head, and the other end is provided with an inclined surface that abuts against the end of the brush holder pin, and the inclined surfaces of the two first riveting cores are arranged oppositely.

[0007] For the present invention with the above characteristics: the positions of the two first riveting cores and the brush holder pins are arranged oppositely. As the riveting head presses down, the inclined surface applies force to the straight brush holder pins, making the brush holder pins form a certain bending angle, which is convenient for the processing of the second station; the relative arrangement of the two inclined surfaces is related to the orientation of the brush holder pins on the brush holder plate.

[0008] A further setting of the present invention is that: the second station includes a number of second riveting components distributed according to the brush holder, the second riveting component includes two second riveting cores, a stripping rod for pre-pressing the brush holder is arranged between the two first riveting cores, one end of the second riveting core is fixedly connected to the riveting head, and the other end is provided with a pressing block that abuts against the end of the brush holder pin.

[0009] For the present invention with the above characteristics: the positions of the two second riveting cores and the brush holder pins are arranged oppositely. As the riveting head presses down, the pressing block applies force to the bent brush holder pins, riveting the brush holder pins on the brush holder plate, and the bent brush holder contacts the pressing block better.

[0010] A further setting of the present invention is that: an installation cavity for installing the stripping rod is arranged in the riveting head, a first spring connected to the stripping rod is arranged in the installation cavity, and the stripping rod abuts against the brush holder plate first when the riveting head presses down.

[0011] For the present invention with the above characteristics: stripping rods are arranged at both the first station and the second station. When the riveting head presses down, the stripping rod abuts against the brush holder plate first, applying a certain pressure to the brush holder plate to ensure the fit between the brush holder plate and the brush holder, and there is no gap between the brush holder and the brush holder plate after riveting.

[0012] A further setting of the present invention is that: the riveting head includes an upper template and a riveting component mounting plate. The first station and the second station are arranged on the riveting component mounting plate. The upper template is suspended above the working plane through two vertical columns arranged on the working plane. Two spaced-apart pressing plates and a hanging platform arranged between the pressing plates are provided on the upper template. The hanging platform is detachably connected to the riveting component mounting plate. Sliding grooves are provided on one side surface of the two pressing plates facing each other. Sliding blocks that are slidably connected to the sliding grooves are provided on both sides of the hanging platform. The end surface of the sliding block abuts against the bottom of the sliding groove. Limit blocks for limiting the moving range of the hanging platform and limit pin pins for limiting the movement of the hanging platform are respectively arranged at both ends of the hanging platform on the upper template.

[0013] The present invention with the above characteristics: The riveting head is set as a quick-release structure, which is convenient for replacing the riveting head according to the size of the brush holder; by removing the limit pin, the hanging platform can slide in the chute, facilitating the removal of the hanging platform; a limit block is provided at one end of the hanging platform to cooperate with the limit pin to fix the hanging platform; the end face of the slider is in contact with the bottom of the chute to ensure that the hanging platform can be suspended under the upper template by means of the pressing plate.

[0014] A further setting of the present invention is that: the connecting shaft assembly includes a fixing plate connected to the driving source, a connecting core shaft inserted into the rotating disk, a main shaft sleeved outside the connecting core shaft, a connecting block embedded in the main shaft, and a fastener that sequentially passes through the rotating disk, the connecting core shaft, and the connecting block to fixedly connect the three. There are several guide posts connecting the fixing plate and the main shaft between the fixing plate and the main shaft. A guide post cavity for installing the guide posts is provided in the main shaft. A second spring that abuts against the guide posts is provided in the guide post cavity. A floating gap is left between the end faces of the fixing plate and the main shaft. At least two symmetrically arranged support blocks are provided on the working plane, and the support blocks are located below the rotating disk.

[0015] The present invention with the above characteristics: The rotating disk is linked with the driving source through the connecting shaft assembly to realize the station switching of the rotating disk; the connecting shaft assembly cannot bear the pressure of the riveting head, and support blocks are arranged below the rotating disk to bear the riveting pressure, extending the service life of the connecting shaft assembly. At the same time, a spring that abuts against the guide posts is provided in the main shaft, and a floating gap is left between the end faces of the fixing plate and the main shaft, so that the rotating disk has a floating when rotating, ensuring that the rotating disk can rotate smoothly.

[0016] A further setting of the present invention is that: the riveting head further includes a third station for further bending the pins of the brush holder. The third station is located between the first station and the second station, and the structure of the third station is the same as that of the first station.

[0017] The present invention with the above characteristics: The third station is set to further bend the pins of the brush holder, ensuring that the initial bending is in place to facilitate the riveting of the pins of the brush holder in the second station. By setting the third station, the riveting quality is further improved.

[0018] A further setting of the present invention is that: the positioning seat is a groove provided on the end face of the rotating disk. A plurality of positioning components evenly distributed on the bottom of the groove are provided in the groove. The positioning components include a brush holder cushion block embedded in the bottom of the groove, a first brush holder limit block abutting against one end of the brush holder, a second brush holder limit block passing through the brush holder, and a limit clamping block abutting against the other end of the brush holder. The brush holder plate is placed on the end face of the groove.

[0019] The present invention with the above characteristics: The brush holder cushion block protects the brush holder, preventing the surface of the brush holder from being worn due to excessive riveting pressure; the first brush holder limit block and the second brush holder limit block cooperate to position the brush holder, and the limit clamping block limits the brush holder to prevent it from shifting.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0022] Figure 2 It is an exploded view of the riveting head of an embodiment of the present invention.

[0023] Figure 3 It is a cross-sectional view of the rotating disk and the connecting shaft assembly of an embodiment of the present invention. Detailed Embodiment

[0024] This specific embodiment is only an interpretation of the present invention and does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0025] As Figures 1-3 shown, an automatic device for riveting a brush holder includes a frame 1. On the working plane of the frame 1, a riveting head 2 that can reciprocate vertically and a rotating disk 3 located directly below the riveting head 2 are installed. Below the working plane, a driving source 4 for driving the rotation of the rotating disk 3 is provided. At the center of the rotating disk 4, a connecting shaft assembly 5 connected to the driving source 4 is provided. On the riveting head 2, there are a first station a for preliminarily bending the brush holder pin d and a second station b for riveting the brush holder pin on the brush holder plate. In the rotating disk 3, there is at least one positioning seat 31 for fixing the brush holder, and the positioning seat 31 can be rotated to the corresponding processing station along with the rotating disk 3.

[0026] The first station a includes a number of first riveting components a1 distributed according to the brush holder. Each first riveting component a1 includes two first riveting cores a11. Between the two first riveting cores a11, there is a stripping rod a2 for pre-pressing the brush holder plate. One end of the first riveting core a11 is fixedly connected to the riveting head 2, and the other end is provided with an inclined surface a111 that abuts against the end of the brush holder pin. The inclined surfaces a111 of the two first riveting cores are arranged opposite to each other.

[0027] The second station b includes a number of second riveting components b1 distributed according to the brush holder. Each second riveting component b1 includes two second riveting cores b11. Between the two second riveting cores b11, there is a stripping rod a2 for pre-pressing the brush holder plate. One end of the second riveting core b11 is fixedly connected to the riveting head 2, and the other end is provided with a pressing block b111 that abuts against the end of the brush holder pin.

[0028] An installation cavity (not shown in the figure) for installing the stripping rod a2 is provided inside the riveting head 2. A first spring (not shown in the figure) connected to the stripping rod a2 is provided inside the installation cavity. When the riveting head 2 presses down, the stripping rod a2 first abuts against the brush holder plate e.

[0029] The riveting head 2 includes an upper template 21 and a riveting assembly mounting plate 22. The first station a and the second station b are arranged on the riveting assembly mounting plate 22. The upper template 21 is suspended above the working plane through two vertical columns 23 arranged on the working plane. Two spaced-apart pressing plates 24 are provided on the upper template 21, and a hanging platform 25 is provided between the pressing plates 24. The hanging platform 25 is detachably connected to the riveting assembly mounting plate 22. A sliding groove 241 is provided on one side surface of the two pressing plates 24 facing each other. Sliding blocks 251 slidably connected to the sliding groove 241 are provided on both sides of the hanging platform 25. The end surface of the sliding block 251 abuts against the bottom of the sliding groove 241. Limit blocks 26 for restricting the movement range of the hanging platform 25 and limit pins 27 for restricting the movement of the hanging platform 25 are respectively provided at both ends of the upper template 21 where the hanging platform 25 is located.

[0030] The connecting shaft assembly 5 includes a fixing plate 51 connected to the driving source 4, a connecting core shaft 52 inserted into the rotating disk 3, a main shaft 53 sleeved outside the connecting core shaft 52, a connecting block 54 embedded in the main shaft 53, and fasteners (not shown in the figure) that sequentially pass through the rotating disk, the connecting core shaft, and the connecting block and fixedly connect the three. A plurality of guide columns 56 connecting the fixing plate 51 and the main shaft 53 are provided between the fixing plate 51 and the main shaft 53. A guide column cavity for installing the guide columns 56 is provided inside the main shaft 53. A second spring 57 abutting against the guide columns is provided inside the guide column cavity. A floating gap is left between the end surfaces of the fixing plate and the main shaft. At least two symmetrically arranged support blocks 6 are provided on the working plane. The support blocks 6 are located below the rotating disk 3.

[0031] The inside of the riveting head 2 further includes a third station c for further bending the brush holder pins. The third station c is located between the first station a and the second station b. The structure of the third station is the same as that of the first station.

[0032] The positioning seat 31 is a groove provided on the end surface of the rotating disk. A plurality of positioning components 311 evenly distributed on the bottom of the groove are provided inside the groove. The positioning components 311 include a brush holder cushion block 3111 embedded in the bottom of the groove, a first brush holder limit block 3112 abutting against one end of the brush holder, a second brush holder limit block 3113 passing through the brush holder, and a limit clamping block 3114 abutting against the other end of the brush holder. The brush holder plate is placed on the end surface of the groove.

[0033] In this embodiment, four positioning seats are arranged on the rotating disk in a circular distribution, three processing stations are arranged on the riveting head, four positioning components are arranged in the positioning seats, four first riveting components are arranged at the first station, and four second riveting components are arranged at the second station.

[0034] The worker places the brush holders in the positioning seats of the rotating disk in sequence. The positioning components in the positioning seats limit the positions of the brush holders. Then, the brush holder plate is placed on the brush holders, and the pins of the brush holders pass through the through holes of the brush holder plate. The power is turned on, and the rotating disk is driven by the driving source to rotate to the position below the first station. There is an upper die limit block at the center of the rotating disk. The riveting head descends along the column. The stripping rod first abuts against the brush holder plate. The riveting head continues to press down, and the stripping rod compresses the first spring until the riveting component mounting plate abuts against the upper die limit block. At this time, under the pressing of the stripping rod, there is no gap between the brush holder and the brush holder plate. At the same time, as the riveting head presses down, the first riveting core bends the pins of the brush holders preliminarily. The riveting head rises, and the rotating disk continues to rotate to the third station. The operation is repeated. The rotating disk continues to rotate to the second station, and the operation is repeated. At this time, the pressing block on the second riveting core rivets the pins of the brush holders firmly on the brush board. The riveting head rises to complete the riveting of the brush holders. The rotating disk continues to rotate to the initial position, and the worker can take out the brush holder plate assembly. After the rotating disk carries the first set of workpieces to the first station, the worker can place the second set of workpieces in the positioning seats and wait for processing.

[0035] When brush holders of different sizes need to be processed, the rotating disk and the riveting head need to be replaced; for the disassembly of the rotating disk, only the fasteners need to be loosened to separate the rotating disk from the connecting shaft assembly. For the disassembly of the riveting head, only the limit pin needs to be removed to separate the riveting component mounting plate from the upper template. The upper template is arranged above the working plane through the column and does not need to be replaced.

Claims

1. An automated device for riveting a brush holder, comprising a frame, characterized in that: On the working plane of the frame, a riveting head that can reciprocate vertically and a rotating disk located directly below the riveting head are installed. Below the working plane, a driving source for driving the rotation of the rotating disk is provided. At the center of the rotating disk, a connecting shaft assembly connected to the driving source is provided. On the riveting head, there is a first station for initially bending the brush holder pin and a second station for riveting the brush holder pin on the brush holder plate. Inside the rotating disk, there is at least one positioning seat for fixing the brush holder, and the positioning seat can be rotated by the rotating disk to the corresponding processing station. The connecting shaft assembly includes a fixing plate connected to the driving source, a connecting core shaft inserted into the rotating disk, a main shaft sleeved outside the connecting core shaft, a connecting block embedded in the main shaft, and a fastener that sequentially passes through the rotating disk, the connecting core shaft, and the connecting block to fixedly connect the three. Between the fixing plate and the main shaft, there are several guide columns connecting the two. Inside the main shaft, there is a guide column cavity for installing the guide columns. Inside the guide column cavity, there is a second spring that abuts against the guide columns. A floating gap is left between the end faces of the fixing plate and the main shaft. On the working plane, there are at least two symmetrically arranged support blocks located below the rotating disk. Inside the riveting head, there is also a third station for further bending the brush holder pin, and the third station is located between the first station and the second station, and the structure of the third station is the same as that of the first station.

2. The automated equipment for riveting a brush holder according to claim 1, characterized in that: The first station includes several first riveting components distributed according to the brush holders. The first riveting component includes two first riveting cores. Between the two first riveting cores, there is a stripping rod for pre-pressing the brush holder plate. One end of the first riveting core is fixedly connected to the riveting head, and the other end is provided with an inclined surface that abuts against the end of the brush holder pin. The inclined surfaces of the two first riveting cores are arranged oppositely.

3. The automated equipment for riveting a brush holder according to claim 1, characterized in that: The second station includes several second riveting components distributed according to the brush holders. The second riveting component includes two second riveting cores. Between the two second riveting cores, there is a stripping rod for pre-pressing the brush holder plate. One end of the second riveting core is fixedly connected to the riveting head, and the other end is provided with a pressing block that abuts against the end of the brush holder pin.

4. An automated device for riveting a brush holder according to claim 2 or 3, characterized in that: Inside the riveting head, there is an installation cavity for installing the stripping rod. Inside the installation cavity, there is a first spring connected to the stripping rod. When the riveting head presses down, the stripping rod first abuts against the brush holder plate.

5. The automated equipment for riveting a brush holder according to claim 1, characterized in that: The riveting head includes an upper template and a riveting component installation plate. The first station and the second station are arranged on the riveting component installation plate. The upper template is suspended above the working plane through two vertical columns arranged on the working plane. On the upper template, there are two spaced-apart pressing plates and a hanging platform arranged between the pressing plates. The hanging platform is detachably connected to the riveting component installation plate. On one side of the two pressing plates facing each other, there are sliding grooves. On both sides of the hanging platform, there are sliding blocks slidably connected to the sliding grooves. The end face of the sliding block abuts against the bottom of the sliding groove. At both ends of the hanging platform on the upper template, there are limit blocks for restricting the movement range of the hanging platform and limit pin bolts for restricting the movement of the hanging platform.

6. The automated equipment for riveting a brush holder according to claim 1, characterized in that: The positioning seat is a groove provided on the end face of the rotating disk. A number of positioning components are evenly distributed on the bottom of the groove. The positioning components include a brush holder pad embedded in the bottom of the groove, a first brush holder limit block abutting against one end of the brush holder, a second brush holder limit block passing through the brush holder, and a limit clamping block abutting against the other end of the brush holder. The brush holder plate is placed on the end face of the groove.

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