Automatic assembling machine for carbon brush holder torsion spring

Abstract

The application discloses a kind of carbon brush holder torsion spring automatic assembly machine, comprising: bearing seat, for bearing preloaded carbon brush carbon brush holder, carbon brush holder is equipped with the spring post being connected with the main body of torsion spring;Torsion spring guiding mechanism, including guiding module and the first drive module for driving guiding module relative to bearing seat movement, guiding module is equipped with for guiding torsion spring guiding channel;Torsion spring material taking mechanism, for placing torsion spring on spring post, and make the first torsion arm or second torsion arm of torsion spring be in guiding channel;Torsion spring assembly mechanism, including second drive module and be connected on second drive module and push module and rotating module, rotating module is used to rotate the torsion spring entering guiding channel, push module is used to push after rotating torsion spring, to make torsion spring respectively with carbon brush holder and carbon brush card interface.This scheme can reduce torsion spring incoming pose accuracy requirement, save labor.

Description

Technical Field

[0001] This invention relates to the field of torsion spring assembly technology, specifically an automatic assembly machine for carbon brush holder torsion springs. Background Technology

[0002] like Figure 1 The carbon brush holder assembly shown includes a carbon brush holder 100, a carbon brush 200, and a torsion spring 300. The carbon brush 200 is slidably connected to the carbon brush holder 100. The torsion spring 300 is sleeved on the spring post 110 of the carbon brush holder 100. The first torsion arm 310 of the torsion spring 300 abuts against a groove on the carbon brush holder 100 (hereinafter referred to as the first groove 120), and the second torsion arm 320 of the torsion spring 300 abuts against a groove on the carbon brush 200 (hereinafter referred to as the second groove 210).

[0003] To improve the efficiency of torsion spring assembly and reduce worker fatigue, the industry hopes to achieve automated torsion spring assembly. Traditional vibratory feeders are commonly used to feed torsion springs because they can automatically queue and feed messy incoming parts with high precision. However, due to the small size and unique shape of the torsion springs, jamming (the torsion arm of the spring getting stuck on the vibratory feeder) is a common problem when using ordinary vibratory feeders for automated feeding. Furthermore, how to assemble the torsion spring into the slot is also a major challenge in automated assembly. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides an automatic assembly machine for carbon brush holder torsion springs, which can free the torsion spring feeding method from dependence on ordinary vibratory feeders, reduce the requirements for the torsion spring feeding position accuracy, and achieve fully automatic assembly, saving labor.

[0005] This application discloses an automatic assembly machine for carbon brush holder torsion springs, comprising:

[0006] A support base is used to support a carbon brush holder pre-loaded with carbon brushes. The carbon brush holder is provided with a spring post connected to the main body of a torsion spring and a first groove that engages with the first torsion arm of the torsion spring. The carbon brush is provided with a second groove that engages with the second torsion arm of the torsion spring.

[0007] A torsion spring guiding mechanism includes a guiding module and a first driving module for driving the guiding module to move relative to the support seat, wherein the guiding module is provided with a guiding channel for guiding the torsion spring;

[0008] A torsion spring picking mechanism is used to place the torsion spring on the spring post, and to position the first torsion arm or the second torsion arm of the torsion spring within the guide channel;

[0009] The torsion spring assembly mechanism includes a second drive module and a push-down module and a rotation module connected to the second drive module. The rotation module is used to rotate the torsion spring that enters the guide channel, and the push-down module is used to push the rotated torsion spring down so that the torsion spring engages with the carbon brush holder and the carbon brush respectively.

[0010] Specifically, the guide module includes a detachably connected pressure plate and a guide plate, the pressure plate being connected to the first drive module, and the guide channel being disposed on the guide plate.

[0011] Specifically, the guide channel includes a first guide wall and a second guide wall disposed opposite to each other on the guide plate. The first guide wall and the second guide wall are used together to guide the second torsion arm of the torsion spring. The lower end of the first guide wall can abut against the carbon brush holder.

[0012] Specifically, the guide plate is also provided with a third guide wall, which is used to guide the first torsion arm of the torsion spring, and the lower end of the third guide wall can abut against the carbon brush holder.

[0013] Specifically, the guide plate is also provided with a third guide wall, which is used to guide the first torsion arm of the torsion spring, and the lower end of the third guide wall can abut against the carbon brush holder.

[0014] Specifically, the rotating module includes a mounting plate and a rack, a rotary drive cylinder, and a bearing disposed on the mounting plate. A rotating rod is disposed inside the bearing, and a gear meshing with the rack is sleeved on the rotating rod. The lower end of the rotating rod is provided with an arc-shaped wall adapted to the main body of the torsion spring, and the arc-shaped wall is provided with a stepped surface for torsioning the first torsion arm of the torsion spring.

[0015] Specifically, the rotating rod is a hollow structure.

[0016] Specifically, the push-down module includes a push-down cylinder connected to the mounting plate and a torsion spring push rod connected to the push-down cylinder, the torsion spring push rod passing through the interior of the rotating rod.

[0017] Specifically, the second drive module is also connected to a carbon brush pusher for pushing the carbon brush.

[0018] Specifically, the torsion spring material handling mechanism includes a robotic arm, a gripper cylinder connected to the robotic arm, and grippers connected to the gripper cylinder.

[0019] The present invention has at least the following beneficial effects:

[0020] 1. Since the guide channel of the guide module can absorb large material feeding position errors, the assembly machine in this embodiment has reduced the positional accuracy requirements of the torsion spring material. Thus, a flexible vibratory feeder can be used to replace the traditional vibratory feeder for feeding the torsion spring, solving the problem of material jamming that occurs when feeding the torsion spring by the traditional vibratory feeder.

[0021] 2. By having the first and third guide walls abut against the two torsion arms of the torsion spring, the torsion spring is kept in a pushable assembly state throughout the assembly process. Then, the torsion spring is pushed downward by the torsion spring push rod, thus completing the difficult assembly action in a fully automatic manner and saving labor.

[0022] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the carbon brush holder assembly in the background art;

[0025] Figure 2 This is a schematic diagram of the automatic assembly machine for carbon brush holder torsion springs in an embodiment of the present invention;

[0026] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0027] Figure 4 This is a schematic diagram of the torsion spring guide mechanism in an embodiment of the present invention;

[0028] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle;

[0029] Figure 6 This is a schematic diagram of the guide plate structure in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the torsion spring assembly mechanism in an embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional view of the torsion spring assembly mechanism in an embodiment of the present invention;

[0032] Figure 9 yes Figure 8A magnified view of a section at point C;

[0033] Figure 10 This is a schematic diagram of the torsion spring material handling mechanism in an embodiment of the present invention.

[0034] The reference numerals in the above figures are as follows: 1. Support seat; 2. Torsion spring guide mechanism; 21. Guide module; 211. Pressure plate; 212. Guide plate; 2120. Guide channel; 2121. First guide wall; 2122. Second guide wall; 2123. Third guide wall; 2124. Positioning surface; 22. First drive module; 3. Torsion spring picking mechanism; 31. Robotic arm; 32. Gripper cylinder; 33. Gripper; 4. Torsion spring assembly mechanism; 41. Second drive module; 42. Push-down module; 421. 422. Downward-pushing cylinder; 43. Torsion spring push rod; 44. Rotating module; 45. Mounting plate; 46. Rack; 47. Rotary drive cylinder; 48. Bearing; 49. Rotating rod; 40. Arc wall; 41. Stepped surface; 42. Gear; 43. Third drive module; 44. Carbon brush push rod; 100. Carbon brush holder; 110. Spring column; 120. First groove; 200. Carbon brush; 210. Second groove; 300. Torsion spring; 310. First torsion arm; 320. Second torsion arm. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "fixing," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0039] Furthermore, the terms "first" and "second" are used only to distinguish between different terms in description and do not have any special meaning.

[0040] The automatic assembly machine for carbon brush holder torsion springs in this embodiment can be used for, for example... Figure 1 The torsion spring 300 of the carbon brush holder assembly shown is automatically assembled. Specifically, the assembly machine is mainly used to install the torsion spring 300 on the spring post 110 of the carbon brush holder 100, and to engage the first torsion arm 310 of the torsion spring 300 in the first groove 120 of the carbon brush holder 100 and the second torsion arm 320 in the second groove 210 of the carbon brush 200.

[0041] Combination Figure 2 and Figure 3As shown, the automatic carbon brush holder torsion spring assembly machine mainly includes: a support base 1, a torsion spring guiding mechanism 2, a torsion spring picking mechanism 3, and a torsion spring assembly mechanism 4. Of course, the assembly machine also includes a control system (e.g., a PLC) for coordinating the cooperation of the various mechanisms. Preferably, the assembly machine may also include a workbench for installing the aforementioned components and mechanisms. The support base 1 is used to support the carbon brush holder 100 pre-loaded with carbon brushes 200. In other words, when the carbon brush holder 100 is placed on the support base 1, the carbon brushes 200 are already pre-loaded on the carbon brush holder 100 (the carbon brushes 200 are slidably connected to the carbon brush holder 100 via a sliding groove). The carbon brush holder 100 is provided with a spring post 110 connected to the main body of the torsion spring 300 and a first groove 120 engaging with the first torsion arm 310 of the torsion spring 300. The carbon brush 200 is provided with a second groove 210 engaging with the second torsion arm 320 of the torsion spring 300. The torsion spring guiding mechanism 2 includes a guiding module 21 and a first driving module 22 for driving the guiding module 21 to move relative to the support seat 1. The guiding module 21 is provided with a guiding channel 2120 for guiding the torsion spring 300. The torsion spring picking mechanism 3 is used to pick up the torsion spring 300 and sleeve the main body of the torsion spring 300 on the spring column 110, while making the first torsion arm 310 or the second torsion arm 320 of the torsion spring 300 located in the guiding channel 2120. The torsion spring assembly mechanism 4 includes a second driving module 41 and a pushing module 42 and a rotating module 43 connected thereto. The second driving module 41 drives the pushing module 42 and the rotating module 43 to above the torsion spring 300. The rotating module 43 rotates the torsion spring 300 that has entered the guiding channel 2120. The pushing module 42 pushes the rotated torsion spring 300 downward, so that the torsion spring 300 engages with the carbon brush holder 100 and the carbon brush 200 respectively.

[0042] Combination Figure 2 and Figure 4 As shown, the guide module 21 includes a pressure plate 211 and a guide plate 212 that are detachably connected. The first drive module 22 can be a common single-axis drive module, including a cylinder and a slide connected to the piston rod of the cylinder. The pressure plate 211 is used to connect with the slide of the first drive module 22, and the pressure plate 211 can apply pressure to the carbon brush holder 100 during assembly to prevent displacement of the carbon brush holder 100 during assembly. The guide channel 2120 is formed on the guide plate 212.

[0043] Furthermore, combined Figures 3 to 6As shown, a first guide wall 2121 and a second guide wall 2122 are connected to the guide plate 212. The first guide wall 2121 and the second guide wall 2122 are arranged opposite to each other to form the aforementioned guide channel 2120. The first guide wall 2121 and the second guide wall 2122 can be used together to guide the second torsion arm 320 of the torsion spring 300. Specifically, the guiding process is as follows: when the torsion spring picking mechanism 3 places the torsion spring 300 on the spring column 110, the position of the torsion spring 300 does not need to be very precise. It is only necessary to ensure that the second torsion arm 320 of the torsion spring 300 falls into the guide channel 2120. The first guide wall 2121 and the second guide wall 2122 can limit the swing range of the second torsion arm 320 of the torsion spring 300, thereby ensuring that the rotating module 43 rotates the torsion spring 300 to the precise position in the subsequent process. The guide channel 2120 structure reduces the positional accuracy requirements of the torsion spring 300 during material feeding, thus eliminating the need for traditional vibratory feeder feeding and avoiding the risk of the torsion arm of the torsion spring 300 getting stuck on the vibratory feeder. Preferably, when the first drive module 22 drives the guide module 21 to move above the brush holder 100, the lower end of the first guide wall 2121 on the guide plate 212 can abut against the brush holder 100, or in other words, there is no gap between the lower end of the first guide wall 2121 and the part on the brush holder 100 used to form the aforementioned groove, to prevent the second torsion arm 320 of the torsion spring 300 from rotating into the gap, thereby ensuring that the second torsion arm 320 can smoothly rotate into the second groove 210 of the brush 200. The length of the second guide wall 2122 is greater than the length of the first guide wall 2121, or in other words, the position of the lower end face of the second guide wall 2122 is lower than the position of the lower end face of the first guide wall 2121.

[0044] Continue to refer to Figures 3 to 6 The guide plate 212 is also provided with a third guide wall 2123, which is used to guide the first torsion arm 310 of the torsion spring 300. When the first drive module 22 drives the guide module 21 to move above the carbon brush holder 100, the lower end of the third guide wall 2123 on the guide plate 212 can abut against the carbon brush holder 100. There is no gap between the lower end of the third guide wall 2123 and the part of the carbon brush holder 100 used to form the first groove 120, so as to prevent the first torsion arm 310 of the torsion spring 300 from rotating into the gap, and to ensure that the first torsion arm 310 can smoothly rotate into the first groove 120 of the carbon brush holder 100. By setting the third guide wall 2123, the downward stroke of the rotating module 43 can be reduced. Specifically, when the rotating module 43 descends and rotates the torsion spring 300 until the first torsion arm 310 abuts against the third guide wall 2123 (the first torsion arm 310 is located between the main body and the third guide wall 2123), the downward movement can stop. During the subsequent downward movement of the torsion spring 300, the third guide wall 2123 can maintain its rotated posture.

[0045] Furthermore, such as Figure 6 As shown, the middle of the guide plate 212 can be a hollow structure to allow space for the torsion spring feeding mechanism 3. To improve the structural strength of the first guide wall 2121 and the third guide wall 2123, they can be connected to each other. The upper surface of the part of the third guide wall 2123 that connects to the guide plate 212 can serve as a positioning surface 2124 for initial positioning of the torsion spring 300.

[0046] like Figure 2 and Figure 7 As shown, in this embodiment, the rotating module 43 is connected to the second driving module 41 via a third driving module 44, and the push-down module 42 is connected to the rotating module 43. Both the third driving module 44 and the second driving module 41 can be existing single-axis driving modules. The third driving module 44 drives the rotating module 43 to move up and down to contact or separate from the torsion spring 300, and the second driving module 41 drives the rotating module 43 to move horizontally to be above or away from the torsion spring 300.

[0047] Combination Figure 2 and Figures 7 to 9 As shown, the rotating module 43 includes a mounting plate 431 connected to the third drive module 44, and a rack 432, a rotating drive cylinder 433, and a bearing 434 disposed on the mounting plate 431. A rotating rod 435 passes through the bearing 434, and a gear 436 meshing with the rack 432 is fitted on the outer wall of the rotating rod 435. The lower end of the rotating rod 435 has an arc-shaped wall 4351 adapted to the main body of the torsion spring 300, and the arc-shaped wall 4351 has a stepped surface 4352 for abutting against the first torsion arm 310 of the torsion spring 300.

[0048] Continue to refer to Figure 2 and Figures 7 to 9 As shown, the rotating rod 435 is a hollow structure, or in other words, the rotating rod 435 is a hollow rod. The push-down module 42 includes a push-down cylinder 421 connected to the mounting plate 431 and a torsion spring push rod 422 connected to the piston rod of the push-down cylinder 421. The torsion spring push rod 422 passes through the interior of the rotating rod 435. That is to say, the end of the torsion spring push rod 422 away from the push-down cylinder 421 passes into the rotating rod 435 and extends downward to push the torsion spring 300 downward.

[0049] Better, combined Figure 2 and Figure 3 As shown, a carbon brush push rod 45 is also connected to the output shaft of the second drive module 41. The carbon brush push rod 45 is used to push the carbon brush 200 to ensure that the carbon brush 200 is fully inserted into the slide groove of the carbon brush holder 100, so as not to affect the second torsion arm 320 of the torsion spring 300 from rotating into the second groove 210 of the carbon brush 200.

[0050] like Figure 10As shown, the torsion spring material handling mechanism 3 includes a robotic arm 31 (only the end of the robotic arm 31 is shown in the figure), a gripper cylinder 32 connected to the robotic arm 31, and a pair of grippers 33 connected to the gripper cylinder 32. The robotic arm 31 can be a four-axis robotic arm 31. By using the robotic arm 31 equipped with grippers 33 for material handling, the torsion spring 300 can be fed through a flexible vibratory feeder during operation of this assembly machine. The flexible vibratory feeder can solve the problem of material jamming in traditional vibratory feeders.

[0051] In summary, the working process of the automatic carbon brush holder torsion spring assembly machine in this embodiment is as follows: The carbon brush holder 100 pre-installed with carbon brushes 200 is placed on the support seat 1 and positioned. The first drive module 22 drives the guide module 21 downward, so that the pressure plate 211 presses on the carbon brush holder 100. The robot arm 31 places the torsion spring 300 taken from the flexible vibrating plate onto the spring post 110 of the carbon brush holder 100, and causes the second torsion arm 320 of the torsion spring 300 to enter the guide channel 2120. The main body of the torsion spring 300 and the first torsion arm 310 rest on the positioning surface 2124 of the guide plate 212; the second drive module 41 drives the rotating rod 435 to move above the main body of the torsion spring 300, and at the same time, the carbon brush push rod 45 pushes the carbon brush 200 into the slide groove. Subsequently, the third drive module 44 drives the rotating rod 435 to move downward to contact the main body of the torsion spring 300, and the rotary drive cylinder 433 drives the rotating rod 435 to rotate and push the first torsion arm 310 of the torsion spring 300 to rotate. When the first torsion arm 310 is rotated, the main body of the torsion spring 300 and the second torsion arm 320 also tend to rotate. When the second torsion arm 320 rotates to abut against the first guide wall 2121, the force applied by the rotating rod 435 to the first torsion arm 310 can deform the first torsion arm 310, thereby abutting against the third guide wall 2123 (that is, the first torsion arm 310 falls from the positioning surface 2124 into the space between the main body of the torsion spring 300 and the third guide wall 2123). Subsequently, the torsion spring 300 will rotate with the first torsion arm 310 as the first torsion arm 310 rotates. The torsion spring 300 is pushed downward by the torsion spring push rod 422, with the first torsion arm 310 abutting against the third guide wall 2123 and the second torsion arm 320 abutting against the first guide wall 2121. When the first torsion arm 310 moves to the first groove 120, the pressure from the third guide wall 2123 is released, and it moves into the first groove 120. At the same time, the pressure from the first guide wall 2121 on the second torsion arm 320 is also released, and it moves into the second groove 210. Thus, the automatic assembly of the torsion spring 300 is completed.

[0052] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An automatic assembly machine for carbon brush holder torsion springs, characterized in that, include: A support for supporting a carbon brush holder pre-loaded with carbon brushes, the carbon brush holder having a spring post connected to the body of a torsion spring; A torsion spring guiding mechanism includes a guiding module and a first driving module for driving the guiding module to move relative to the support seat, wherein the guiding module is provided with a guiding channel for guiding the torsion spring; A torsion spring picking mechanism is used to place the torsion spring on the spring post, and to position the first torsion arm or the second torsion arm of the torsion spring within the guide channel; The torsion spring assembly mechanism includes a second drive module and a push-down module and a rotation module connected to the second drive module. The rotation module is used to rotate the torsion spring that enters the guide channel, and the push-down module is used to push the rotated torsion spring down so that the torsion spring engages with the carbon brush holder and the carbon brush respectively.

2. The automatic assembly machine for carbon brush holder torsion springs according to claim 1, characterized in that, The guide module includes a detachably connected pressure plate and a guide plate. The pressure plate is connected to the first drive module, and the guide channel is disposed on the guide plate.

3. The automatic assembly machine for carbon brush holder torsion springs according to claim 2, characterized in that, The guide channel includes a first guide wall and a second guide wall disposed opposite to each other on the guide plate. The first guide wall and the second guide wall are used together to guide the second torsion arm of the torsion spring. The lower end of the first guide wall can abut against the carbon brush holder.

4. The automatic assembly machine for carbon brush holder torsion springs according to claim 3, characterized in that, The guide plate is also provided with a third guide wall, which is used to guide the first torsion arm of the torsion spring. The lower end of the third guide wall can abut against the carbon brush holder.

5. The automatic assembly machine for carbon brush holder torsion springs according to claim 1, characterized in that, The rotating module is connected to the second driving module via a third driving module, which is used to drive the rotating module to move up and down.

6. The automatic assembly machine for carbon brush holder torsion springs according to claim 1, characterized in that, The rotating module includes a mounting plate and a rack, a rotary drive cylinder, and a bearing disposed on the mounting plate. A rotating rod is disposed inside the bearing, and a gear meshing with the rack is sleeved on the rotating rod. The lower end of the rotating rod is provided with an arc-shaped wall adapted to the main body of the torsion spring, and the arc-shaped wall is provided with a stepped surface for torsion of the first torsion arm of the torsion spring.

7. The automatic assembly machine for carbon brush holder torsion springs according to claim 6, characterized in that, The rotating rod is a hollow structure.

8. The automatic assembly machine for carbon brush holder torsion springs according to claim 7, characterized in that, The push-down module includes a push-down cylinder connected to the mounting plate and a torsion spring push rod connected to the push-down cylinder, the torsion spring push rod passing through the interior of the rotating rod.

9. The automatic assembly machine for carbon brush holder torsion springs according to claim 1, characterized in that, The second drive module is also connected to a carbon brush pusher for pushing the carbon brush.

10. The automatic assembly machine for carbon brush holder torsion springs according to claim 1, characterized in that, The torsion spring material handling mechanism includes a robotic arm, a gripper cylinder connected to the robotic arm, and grippers connected to the gripper cylinder.

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