Auxiliary assembly device for brush holder of electric seat drive motor of automobile and its assembly method

Abstract

The present invention discloses an auxiliary assembly device for a brush holder of a vehicle electric seat drive motor and an assembly method thereof, comprising a brush holder assembly, the brush holder assembly comprising a brush holder body, a brush, a spring, and an end cap, the brush holder body being provided with a first through hole in a vertical direction, the auxiliary assembly device entering and exiting the brush holder body through the first through hole, the auxiliary assembly device comprising an assembly device body having an internal hollow structure, the assembly device body being provided with a second through hole at the top in a vertical direction, the assembly device body being provided with a first boss and a second boss on an outer circumferential surface, the outer circumferential surface of the first boss being a conical surface, the interior of the second boss being through in a transverse direction, and a push rod assembly being installed inside the assembly device body. Beneficial effect: the spring is first installed by the auxiliary assembly device, and then the brush and the end cap are installed in sequence, and through the coordinated use of the first boss, the second boss, and the push rod assembly, the brush holder can be assembled by simply moving the auxiliary assembly device and pressing the pressure rod, thereby reducing the difficulty of assembling the brush holder and improving the assembly efficiency.

Description

Technical Field

[0001] The present invention relates to an auxiliary assembly device and an assembly method for a brush holder of an electric seat drive motor in an automobile, and belongs to the technical field of brush holder assembly. Background Art

[0002] With the gradual development of the automobile industry, people's experience of driving comfort has gradually improved. Among them, automobile seats have been endowed with more functions, and therefore more power systems driven by motors need to be installed in the seat frame. In order to save space, seat motors are gradually becoming smaller, and seat brush holders are also becoming smaller accordingly. Due to the smaller size of the seat brush holder, its installation difficulty has gradually increased. Currently, workers manually install each part of the brush holder. When assembling and pressing two carbon brushes, there is no extra hand to install the end cover of the brush holder. If one hand is freed to install the end cover, then one of the carbon brushes will return to its original position, and it is impossible to easily install the end cover, which requires more time for installation. As a result, the installation difficulty increases and the operation efficiency is low. Summary of the Invention

[0003] Object of the Invention: Aiming at the deficiencies existing in the prior art, the present invention provides an auxiliary assembly device and an assembly method for a brush holder of an electric seat drive motor in an automobile. The present invention uses the auxiliary assembly device to assist in assembling the brush holder of the seat drive motor, improving the assembly efficiency and reducing the assembly difficulty.

[0004] Technical Solution: The auxiliary assembly device for a brush holder of an electric seat drive motor in an automobile includes a brush holder assembly. The brush holder assembly includes a brush holder body, carbon brushes, springs, and an end cover. The brush holder body is provided with a first through hole in the vertical direction, and the auxiliary assembly device enters and exits the brush holder body through the first through hole. The auxiliary assembly device includes an assembly device body with a hollow structure inside. The top of the assembly device body in the vertical direction is provided with a second through hole. The outer circumferential surface of the assembly device body is provided with a first boss and a second boss. The outer circumferential surface of the first boss is a conical surface. The conical surface of the first boss contacts the spring and compresses the spring into the brush holder body. The inside of the second boss is penetrated in the horizontal direction. A push rod assembly is installed inside the assembly device body through the second boss and the second through hole. The push rod assembly pushes the carbon brush to compress the spring and then enters the brush holder body.

[0005] After the present invention compresses the spring into the brush holder body through the first boss, the carbon brush is pushed into the brush holder body through the push rod assembly, and the pushing action of the push rod assembly is maintained until the upper surface of the outer edge of the end cover contacts the lower surface of the carbon brush, completing the assembly of the brush holder. This not only reduces the assembly difficulty but also improves the assembly efficiency.

[0006] Preferred option: To assemble the brush into the brush holder body, the push rod assembly includes a pressure rod, a support rod, a push block, and a push rod spring. The two ends of the support rod are respectively hinged to the pressure rod and the push block. The two ends of the push rod spring are respectively connected to the pressure rod and the bottom of the inner cavity of the assembly device body. The support rod controls the push block to slide radially inside the second boss. After the second boss reaches the assembly position, the brush is pushed radially into the brush holder body by pressing the pressure rod to drive the support rod with the push block. When the brush enters, the spring is compressed. At this time, the pressing action is maintained to make the side surface of the brush flush with the inner wall of the first through hole, which is convenient for the subsequent installation of the end cover.

[0007] Preferred option: To prevent the end cover from moving back, a limiting protrusion is provided on the inner wall of the first through hole, and the cross section of the limiting protrusion is a triangular check protrusion structure.

[0008] Preferred option: To compress the spring into the brush holder body, the auxiliary assembly device moves upward through the first through hole. The outer diameter of the first boss is smaller at the top and larger at the bottom. The lower end surface of the first boss contacts the upper end surface of the second boss. The spring is gradually compressed by the conical surface of the first boss as the auxiliary assembly device moves and then enters the brush holder body. Since the outer surface of the first boss is a conical surface, the spring can be gradually compressed into the brush holder body and be flush with the inner wall of the first through hole, preventing obstruction to the subsequent brush assembly.

[0009] Preferred option: To make the outer edge of the end cover located between the brush and the limiting protrusion, a gasket is installed between the second boss and the end cover. Because the upper surface of the brush must be higher than the upper surface of the end cover, if no gasket is added, then as the auxiliary assembly device moves, there will be a situation where the brush directly contacts the outer edge side surface of the end cover and the brush and the end cover cannot be assembled. Therefore, a gasket is installed between the second boss and the end cover to facilitate the assembly of the brush and the end cover.

[0010] Preferred option: To assemble the brush holder, the auxiliary assembly device moves downward through the first through hole. The outer diameter of the first boss is larger at the top and smaller at the bottom. The upper surface of the first boss contacts the lower surface of the second boss. The spring is gradually compressed by the conical surface of the first boss as the auxiliary assembly device moves and then enters the brush holder body. The upper surface of the end cover contacts the lower surface of the first boss and pushes the auxiliary assembly device upward until the outer edge of the end cover moves between the brush and the limiting protrusion. After the spring and the brush are compressed into the brush holder body, the end cover is installed on the assembly device body. Push the end cover upward, and the brush will move inward along the conical surface of the first boss until the assembly with the end cover is completed. Then, the assembly device body is pulled out to complete the brush holder assembly.

[0011] Preferred option: To prevent the wire from obstructing the assembly during movement, a groove is provided on the outer circumferential surface of the first boss in the vertical direction. After installing the brush into the second boss, pass the wire through the first through-hole and then install it into the groove, which facilitates the circuit connection after the overall installation of the brush holder.

[0012] Assembly method for a brush holder of an automotive electric seat drive motor

[0013] Step 1: Install the spring into the brush holder body, install the brush into the inside of the second boss, install the end cover on the assembly device body, with an interference fit between the end cover and the assembly device body, and insert the auxiliary assembly device upward through the first through-hole;

[0014] Step 2: As the auxiliary assembly device moves, the conical surface of the first boss gradually compresses the spring without pre-tightening force into the brush holder body. When the second boss moves to the position corresponding to the spring, press the pressure rod, and the pressure rod drives the support rod to push the brush into the inside of the brush holder body along the direction of the spring, and keep pressing the pressure rod and continue to move upward;

[0015] Step 3: When the outer edge of the end cover moves between the brush and the limit protrusion, release the pressure rod and pull out the auxiliary assembly device upward to complete the assembly.

[0016] Assembly method for a brush holder of an automotive electric seat drive motor

[0017] Step 1: Install the spring into the brush holder body, install the brush into the inside of the second boss, pass the wire at the end of the brush into the groove of the first boss, and insert the auxiliary assembly device downward through the first through-hole;

[0018] Step 2: As the auxiliary assembly device moves, the conical surface of the first boss gradually compresses the spring without pre-tightening force into the brush holder body. When the second boss moves to the position corresponding to the spring, press the pressure rod, and the pressure rod drives the support rod to push the brush into the inside of the brush holder body along the direction of the spring, and keep pressing the pressure rod;

[0019] Step 3: Install the end cover on the auxiliary assembly device with an interference fit and push the end cover upward until the outer edge of the end cover moves between the brush and the limit protrusion, release the pressure rod, and pull out the auxiliary assembly device upward to complete the assembly.

[0020] Beneficial effects: In the present invention, the auxiliary assembly device is used to install the spring first and then install the brush and the end cover in sequence. During the installation process, through the coordinated use of the first boss, the second boss, and the push rod assembly, only by moving the auxiliary assembly device and pressing the pressure rod can the assembly of the brush holder be completed, reducing the difficulty of brush holder assembly and improving the assembly efficiency. Description of the drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.

[0022] Figure 1 It is the schematic diagram of the spring installation structure of the first embodiment of the present invention;

[0023] Figure 2 It is the schematic diagram of the brush installation structure of the first embodiment of the present invention;

[0024] Figure 3 It is the schematic diagram of the end cover installation structure of the first embodiment of the present invention;

[0025] Figure 4 It is the schematic diagram of the completed assembly structure of the first embodiment of the present invention;

[0026] Figure 5 It is the schematic diagram of the spring installation structure of the second embodiment of the present invention;

[0027] Figure 6 It is the schematic diagram of the brush installation structure of the second embodiment of the present invention;

[0028] Figure 7 It is the schematic diagram of the end cover installation structure of the second embodiment of the present invention;

[0029] Figure 8 It is the schematic diagram of the completed assembly structure of the second embodiment of the present invention. Detailed implementation manners

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0033] As Figure 1 shown, an auxiliary assembly device for a brush holder of an automotive electric seat drive motor includes a brush holder assembly 1. The brush holder assembly 1 includes a brush holder body 11, electric brushes 12, springs 13 and end caps 14. The brush holder body 11 is provided with a first through hole 15 in the vertical direction. The auxiliary assembly device 2 enters and exits the brush holder body 11 through the first through hole 15. The auxiliary assembly device 2 includes an assembly device body 21 with a hollow structure inside. A second through hole 22 is opened at the top of the assembly device body 21 in the vertical direction. First bosses 23 and second bosses 24 are provided on the outer circumferential surface of the assembly device body 21. The outer circumferential surface of the first boss 23 is a conical surface. The conical surface of the first boss 23 contacts the spring 13 and compresses the spring 13 into the brush holder body 11. The inside of the second boss 24 is penetrated in the transverse direction. A push rod assembly 3 is installed inside the assembly device body 21 through the second boss 24 and the second through hole 22. The push rod assembly 3 pushes the electric brush 12 to compress the spring 13 and then enter the brush holder body 11.

[0034] After the spring is compressed into the brush holder body through the first boss, the electric brush is pushed into the brush holder body through the push rod assembly. Keep the pushing action of the push rod assembly until the upper surface of the outer edge of the end cap contacts the lower surface of the electric brush, completing the assembly of the brush holder, which not only reduces the assembly difficulty but also improves the assembly efficiency.

[0035] In order to assemble the electric brush into the brush holder body, the push rod assembly 3 includes a pressure rod 31, a support rod 32, a push block 33 and a push rod spring 34. Both ends of the support rod 32 are hinged to the pressure rod 31 and the push block 33 respectively. Both ends of the push rod spring 34 are connected to the pressure rod 31 and the bottom of the inner cavity of the assembly device body 21 respectively. The support rod 32 controls the push block 33 to slide in the radial direction inside the second boss 24. When the second boss reaches the assembly position, the electric brush is pushed into the brush holder body in the radial direction by pressing the pressure rod to drive the support rod with the push block. While the electric brush enters, the spring is compressed. At this time, keep the pressing action to make the side surface of the electric brush flush with the inner wall of the first through hole, which is convenient for the installation of the end cap later.

[0036] To prevent the end cover from moving back, a limiting protrusion 4 is provided on the inner wall of the first through hole 15, and the cross-section of the limiting protrusion 4 is a check protrusion structure in the shape of a triangle. Embodiment

[0037] As Figures 1 - 4 As shown, to compress the spring into the brush holder body, the auxiliary assembly device 2 moves upward through the first through hole 15. The outer diameter of the first boss 23 has a structure that is smaller at the top and larger at the bottom. The lower end surface of the first boss 23 contacts the upper end surface of the second boss 24. As the auxiliary assembly device 2 moves, the spring 13 is gradually compressed by the tapered surface of the first boss 23 and then enters the brush holder body 11. Since the outer surface of the first boss is a tapered surface, the spring can be gradually compressed into the brush holder body and be flush with the inner wall of the first through hole, preventing obstruction to the subsequent brush assembly.

[0038] To position the outer edge of the end cover between the brush and the limiting protrusion, a gasket is installed between the second boss 24 and the end cover 14. Since the upper surface of the brush must be higher than the upper surface of the end cover, without the gasket, as the auxiliary assembly device moves, there will be a situation where the brush directly contacts the outer edge side surface of the end cover and the brush and the end cover cannot be assembled. Therefore, a gasket is installed between the second boss and the end cover to facilitate the assembly of the brush and the end cover.

[0039] Assembly method for the brush holder of an automotive electric seat drive motor

[0040] Step 1: Install the spring 13 into the brush holder body 11, insert the brush 12 into the second boss 24, install the end cover 14 on the assembly device body 21. The end cover 14 and the assembly device body 21 have an interference fit. Insert the auxiliary assembly device 2 upward through the first through hole 15.

[0041] Step 2: As the auxiliary assembly device 2 moves, the tapered surface of the first boss 23 gradually compresses the spring 13 without pre-tension into the brush holder body 11. When the second boss 24 moves to the position corresponding to the spring 13, press the pressure rod 31. The pressure rod 31 drives the support rod 32 to push the brush 12 into the brush holder body 11 along the direction of the spring 13, and keep pressing the pressure rod 31 and continue to move upward.

[0042] Step 3: When the outer edge of the end cover 14 moves between the brush 12 and the limiting protrusion 4, release the pressure rod 31, and pull out the auxiliary assembly device 2 upward to complete the assembly. Embodiment

[0043] As Figures 5 - 8As shown, in order to assemble the brush holder, the auxiliary assembly device 2 moves downward from above through the first through hole 15. The outer diameter of the first boss 23 has a structure that is larger at the top and smaller at the bottom. The upper surface of the first boss 23 contacts the lower surface of the second boss 24. The spring 13 is gradually compressed by the tapered surface of the first boss 23 as the auxiliary assembly device 2 moves and then enters the brush holder body 11. The upper surface of the end cap 14 contacts the lower surface of the first boss 23 and pushes the auxiliary assembly device 2 upward until the outer edge of the end cap 14 moves between the carbon brush 12 and the limit protrusion 4. After the spring and the carbon brush are compressed into the brush holder body, the end cap is installed on the assembly device body. Push the end cap upward, and the carbon brush will move inward along the tapered surface of the first boss until the assembly with the end cap is completed. Then, pull out the assembly device body to complete the assembly of the brush holder.

[0044] In order to prevent the wire from obstructing the assembly during the movement process, a groove 231 is vertically formed on the outer circumferential surface of the first boss 23. After the carbon brush is installed into the second boss, the wire is passed through the first through hole and then installed into the groove, which is convenient for the circuit connection after the overall installation of the brush holder.

[0045] Assembly method for the brush holder of an automotive electric seat drive motor

[0046] Step 1: Install the spring 13 into the brush holder body 11, install the carbon brush 12 into the interior of the second boss 24, pass the wire at the end of the carbon brush 12 through the groove 231 of the first boss 23, and pass the auxiliary assembly device 2 downward through the first through hole 15 from above.

[0047] Step 2: As the auxiliary assembly device 2 moves, the tapered surface of the first boss 23 gradually compresses the spring 13 without pre-tightening force into the brush holder body 11. When the second boss 24 moves to the position corresponding to the spring 13, press the pressure rod 31. The pressure rod 31 drives the support rod 32 to push the carbon brush 12 into the interior of the brush holder body 11 along the direction of the spring 13, and keep pressing the pressure rod 31.

[0048] Step 3: Install the end cap 14 on the auxiliary assembly device 2 with interference fit and push the end cap 14 upward until the outer edge of the end cap 14 moves between the carbon brush 12 and the limit protrusion 4. Then, release the pressure rod 31 and pull out the auxiliary assembly device 2 upward to complete the assembly.

[0049] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0050] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Auxiliary assembly device for the brush holder of an automotive electric seat drive motor, comprising a brush holder assembly (1), the brush holder assembly (1) including a brush holder body (11), carbon brushes (12), springs (13) and end caps (14), the brush holder body (11) being provided with a first through hole (15) in the vertical direction, the auxiliary assembly device (2) passing in and out of the brush holder body (11) through the first through hole (15), the auxiliary assembly device (2) including an assembly device body (21) with a hollow structure inside, the top of the assembly device body (21) in the vertical direction being provided with a second through hole (22), the outer circumferential surface of the assembly device body (21) being provided with a first boss (23) and a second boss (24), the outer circumferential surface of the first boss (23) being a conical surface, the conical surface of the first boss (23) contacting and compressing the spring (13) into the brush holder body (11), the inside of the second boss (24) being penetrated in the transverse direction, a push rod assembly (3) being installed inside the assembly device body (21) through the second boss (24) and the second through hole (22), the push rod assembly (3) pushing the carbon brush (12) to compress the spring (13) and then enter the brush holder body (11); characterized in that: The auxiliary assembly device (2) moves upward through the first through hole (15), the outer diameter of the first boss (23) is of a structure that is smaller at the top and larger at the bottom, the lower end surface of the first boss (23) contacts the upper end surface of the second boss (24), and the spring (13) is gradually compressed by the conical surface of the first boss (23) and enters the brush holder body (11) as the auxiliary assembly device (2) moves; a gasket is installed between the second boss (24) and the end cap (14); the end cap (14) is installed on the assembly device body (21), and the end cap (14) and the assembly device body (21) are in interference fit.

2. The auxiliary assembly device for the brush holder of the automotive electric seat drive motor according to claim 1, characterized in that: The push rod assembly (3) includes a pressure rod (31), a support rod (32), a push block (33) and a push rod spring (34), the two ends of the support rod (32) being respectively hinged to the pressure rod (31) and the push block (33), the two ends of the push rod spring (34) being respectively connected to the pressure rod (31) and the bottom of the inner cavity of the assembly device body (21), and the support rod (32) controlling the push block (33) to slide in the radial direction inside the second boss (24).

3. The auxiliary assembly device for the brush holder of the automotive electric seat drive motor according to claim 2, characterized in that: A limit protrusion (4) is provided on the inner wall of the first through hole (15), and the cross section of the limit protrusion (4) is a check protrusion structure in the shape of a triangle.

4. An auxiliary assembly device for a brush holder of a vehicle electric seat drive motor, comprising a brush holder assembly (1), wherein the brush holder assembly (1) comprises a brush holder body (11), a brush (12), a spring (13) and an end cover (14), wherein the brush holder body (11) is provided with a first through hole (15) in a vertical direction, wherein the auxiliary assembly device (2) enters and exits the brush holder body (11) through the first through hole (15), wherein the auxiliary assembly device (2) comprises an assembly device body (21) having a hollow structure inside, wherein the assembly device body (21) is provided with a second through hole (22) at the top in a vertical direction, wherein the assembly device A first boss (23) and a second boss (24) are provided on the outer circumferential surface of the body (21); the outer circumferential surface of the first boss (23) is a conical surface; the conical surface of the first boss (23) contacts the spring (13) and compresses the spring (13) into the brush holder body (11); the interior of the second boss (24) is through-connected in the transverse direction; a push rod assembly (3) is installed inside the assembly device body (21) through the second boss (24) and the second through hole (22); the push rod assembly (3) pushes the brush (12) to compress the spring (13) and then enters the brush holder body (11); the characteristics are: A limiting protrusion (4) is provided on the inner wall of the first through hole (15), and the cross section of the limiting protrusion (4) is a triangular non-return protrusion structure; The auxiliary assembly device (2) moves from top to bottom through the first through hole (15), the outer diameter of the first boss (23) is a structure with a larger upper portion and a smaller lower portion, the upper surface of the first boss (23) contacts the lower surface of the second boss (24), and the spring (13) is gradually compressed by the conical surface of the first boss (23) as the auxiliary assembly device (2) moves and then enters the brush holder body (11), the upper surface of the end cover (14) contacts the lower surface of the first boss (23) and pushes the auxiliary assembly device (2) to move upward until the outer edge of the end cover (14) moves between the brush (12) and the limiting protrusion (4).

5. The auxiliary assembly device for the brush holder of the automotive electric seat drive motor according to claim 4, characterized in that: The push rod assembly (3) comprises a pressure rod (31), a support rod (32), a push block (33) and a push rod spring (34). The two ends of the support rod (32) are respectively hinged to the pressure rod (31) and the push block (33). The two ends of the push rod spring (34) are respectively connected to the pressure rod (31) and the bottom of the inner cavity of the assembly device body (21). The support rod (32) controls the push block (33) to slide in the radial direction inside the second boss (24).

6. The auxiliary assembly device for the brush holder of the automotive electric seat drive motor according to claim 5, characterized in that: A groove (231) is provided on the outer circumferential surface of the first boss (23) in the vertical direction.

7. The assembly method of the automobile electric seat drive motor brush holder according to claim 3, characterized in that: Step 1: Install the spring (13) into the brush holder body (11), install the brush (12) into the second boss (24), install the end cover (14) on the assembly device body (21), the end cover (14) and the assembly device body (21) are interference fit, and insert the auxiliary assembly device (2) from the bottom to the top through the first through hole (15); Step 2: As the auxiliary assembly device (2) moves, the conical surface of the first boss (23) gradually compresses the spring (13) without pre-tightening force into the brush holder body (11). After the second boss (24) moves to the position corresponding to the spring (13), press the pressure rod (31). The pressure rod (31) drives the support rod (32) to push the carbon brush (12) into the brush holder body (11) along the direction of the spring (13), and keep pressing the pressure rod (31) to continue moving upward; Step 3: After the outer edge of the end cover (14) moves between the carbon brush (12) and the limit projection (4), release the pressure rod (31), and pull out the auxiliary assembly device (2) upward, and the assembly is completed.

8. The assembly method of the brush holder of the automotive electric seat drive motor according to claim 6, characterized in that: Step 1: Install the spring (13) into the brush holder body (11), install the carbon brush (12) into the second boss (24), pass the wire at the end of the carbon brush (12) through the groove (231) of the first boss (23), and pass the auxiliary assembly device (2) through the first through hole (15) from top to bottom; Step 2: As the auxiliary assembly device (2) moves, the conical surface of the first boss (23) gradually compresses the spring (13) without pre-tightening force into the brush holder body (11). After the second boss (24) moves to the position corresponding to the spring (13), press the pressure rod (31). The pressure rod (31) drives the support rod (32) to push the carbon brush (12) into the brush holder body (11) along the direction of the spring (13), and keep pressing the pressure rod (31); Step 3: Install the end cover (14) on the auxiliary assembly device (2) with interference fit and push the end cover (14) upward until the outer edge of the end cover (14) moves between the carbon brush (12) and the limit projection (4), release the pressure rod (31), and pull out the auxiliary assembly device (2) upward, and the assembly is completed.

Images