Starter brush spring assembly tool

Abstract

The application relates to the technical field of starter brush spring mounting, and provides a starter brush spring assembly tool, which comprises a sleeve, a head, a torsion bar, a movable rod and a compression spring; the head is arranged at the front end of the sleeve; one end of the torsion bar extends into the sleeve from the rear end of the sleeve and is in threaded connection with the sleeve; the movable rod is arranged in the sleeve and can move along the axial direction of the sleeve; the compression spring is arranged in the sleeve and located between the movable rod and the torsion bar; the end of the head, which is away from the sleeve, is provided with a positioning pin extending along the axial direction of the sleeve; a sliding hole is arranged on the head and located on the side of the positioning pin; and the movable rod is provided with a pressing pin which passes through the sliding hole and extends out of the head. In the whole assembly process, the axial direction of the assembly tool is always perpendicular to the side plane of the brush spring, the phenomenon of brush spring ejection is avoided, and the safety during brush spring assembly is ensured.

Description

Technical Field

[0001] This invention relates to the field of starter brush spring installation technology, and in particular to a starter brush spring assembly fixture. Background Technology

[0002] During the assembly process of starter brush springs, it is currently common practice to manually use pliers to clamp the brush springs into the brush holder bracket, thereby pressing the brushes inside the brush box.

[0003] The current assembly method has the following problems: 1. Due to the small installation space for the brush spring, it is inconvenient to install the brush spring even with the assistance of clamps; moreover, when clamping the brush spring, the clamps can easily damage the brush spring plating and the shape of the spring, thus affecting the elasticity of the piezoelectric brush, which in turn affects the motor's sound and lifespan. 2. Manual assembly relies on skill, requiring high operator skill levels. Operators need a long training period before they can work, and the uncertainty of the direction and magnitude of force applied manually makes operation difficult and reduces production efficiency. 3. The brush spring has a large elasticity, and it is easy for the brush spring to spring out during assembly, posing a significant safety hazard. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a starter brush spring assembly fixture to ensure safety during brush spring assembly.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: a starter brush spring assembly fixture, including a sleeve, an end, a torsion bar, a movable rod, and a compression spring; the end is installed at the front end of the sleeve; one end of the torsion bar extends from the rear end of the sleeve into the sleeve and is threadedly connected to the sleeve; the movable rod is disposed in the sleeve and can move axially along the sleeve; the compression spring is disposed in the sleeve and is located between the movable rod and the torsion bar; the end of the end away from the sleeve has a positioning pin extending axially along the sleeve; a sliding hole is provided on the end and on the side of the positioning pin; a clamping pin is provided on the movable rod, passing through the sliding hole and extending to the outside of the end.

[0006] Furthermore, the sleeve is provided with an elongated groove that communicates with the inner cavity of the sleeve and extends along the axial direction of the sleeve; the movable rod is provided with a limiting pin located in the elongated groove and movable along the elongated groove.

[0007] Furthermore, two elongated grooves are symmetrically arranged on the sleeve.

[0008] Furthermore, a first cavity is provided on the movable rod at the end opposite to the compression spring; a second cavity is provided on the torsion bar at the end opposite to the compression spring; and the two ends of the compression spring are respectively located in the first cavity and the second cavity.

[0009] Furthermore, the inner cavity of the sleeve includes a first section and a second section connected in sequence; the diameter of the first section is larger than the diameter of the second section; the end of the torsion bar is threadedly connected to the first section of the inner cavity of the sleeve; and the movable rod is slidably fitted in the second section of the inner cavity of the sleeve.

[0010] Furthermore, the torsion bar includes a gripping section and a connecting section connected in sequence; the connecting section of the torsion bar is threadedly connected to the first section of the sleeve cavity; the cross-sectional dimension of the gripping section is larger than the cross-sectional dimension of the connecting section.

[0011] Furthermore, the torsion bar also includes a guide section connected to the connecting section; the guide section is slidably fitted in the second section of the sleeve cavity.

[0012] Furthermore, the outer surface of the grip section is provided with anti-slip texture.

[0013] Furthermore, a groove is provided at the end of the end facing the sleeve; the front end of the sleeve extends into the groove of the end and is fixedly connected to the end.

[0014] Furthermore, the sleeve and the end are fixedly connected by a pin.

[0015] The beneficial effects of this invention are:

[0016] 1. The starter brush spring assembly fixture provided in this embodiment of the invention has a positioning pin that passes through the center of the brush spring to limit its position during assembly. The torsion bar is rotated to make the compression spring provide a uniformly increased pressure, and then the brush spring is assembled on the brush holder bracket by the clamping pin. During the entire assembly process, the axial direction of the assembly fixture is always perpendicular to the side plane of the brush spring to avoid the phenomenon of brush spring ejection and ensure the safety of brush spring assembly.

[0017] 2. The starter brush spring assembly fixture provided in this embodiment of the invention avoids damage to the brush spring plating and the shape of the spring during assembly, ensuring the elasticity of the piezoelectric brush and thus ensuring the service life of the motor.

[0018] 3. The starter brush spring assembly fixture provided in this embodiment of the invention has low requirements for operator skills. During operation, the brush spring can be assembled simply by rotating the torsion bar. The operation is simple and convenient, which improves production efficiency. Attached Figure Description

[0019] 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 recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the starter brush spring assembly fixture provided in an embodiment of the present invention;

[0021] Figure 2 It is along Figure 1 Sectional view of line AA in the middle;

[0022] Figure 3 This is a schematic diagram of the sleeve structure;

[0023] Figure 4 This is a structural diagram of the end;

[0024] Figure 5 This is a schematic diagram of a torsion bar.

[0025] Figure 6 This is a structural diagram of the movable rod;

[0026] Figure 7 This is a schematic diagram of the brush spring assembly.

[0027] The attached figures are labeled as follows: 1-sleeve, 2-end, 3-torsion bar, 4-moving rod, 5-compression spring, 6-limit pin, 7-pin, 8-brush spring, 9-brush spring positioning post, 10-brush holder bracket, 11-long strip groove, 12-first section, 13-second section, 21-positioning pin, 22-sliding hole, 23-groove, 31-second cavity, 32-grip section, 33-connecting section, 34-guide section, 35-anti-slip texture, 41-pressing pin, 42-first cavity. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, it will be further described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0029] See Figures 1 to 6 The starter brush spring assembly fixture provided in this embodiment of the invention includes a sleeve 1, an end 2, a torsion bar 3, a movable rod 4, and a compression spring 5. The end 2 is installed at the front end of the sleeve 1. One end of the torsion bar 3 extends from the rear end of the sleeve 1 into the sleeve 1 and is threadedly connected to the sleeve 1. The movable rod 4 is disposed inside the sleeve 1 and can move axially along the sleeve 1. The compression spring 5 is disposed inside the sleeve 1 and is located between the movable rod 4 and the torsion bar 3. The end of the end 2 away from the sleeve 1 has a positioning pin 21 extending axially along the sleeve 1. A sliding hole 22 is provided on the end 2 and on one side of the positioning pin 21. A clamping pin 41 is provided on the movable rod 4, passing through the sliding hole 22 and extending to the outside of the end 2.

[0030] See Figure 1 , Figure 2 The starter brush spring assembly fixture provided in this embodiment of the invention has a torsion bar 3 threadedly connected to a sleeve 1. By controlling the rotation of the torsion bar 3 relative to the sleeve 1, the compression spring 5 inside the sleeve 1 can be compressed via the torsion bar 3. In the initial state, the compression spring 5 is in a compressed state, with its two ends abutting against the torsion bar 3 and the movable rod 4, respectively. Under the elastic force provided by the compression spring 5, the clamping pin 41 extends to the outside of the end 2. The maximum length of the clamping pin 41 extending outside the end 2 is less than the length of the positioning pin 21, and the length difference between them is preferably equal to the width of the brush spring 8. The shape and size of the positioning pin 21 should be adapted to the shape and size of the center hole of the brush spring 8 so that the positioning pin 21 passes through the center of the brush spring 8 to limit the position of the brush spring 8 and prevent the brush spring 8 from rotating relative to the positioning pin 21.

[0031] See Figure 1 , Figure 2 , Figure 7 The working principle of the starter brush spring assembly fixture provided in this embodiment of the invention is as follows: The operator holds the torsion bar 3 with his right hand and passes the positioning pin 21 through the center of the brush spring 8, while the end of the clamping pin 41 abuts against the side of the brush spring 8; then the operator holds the brush holder bracket 10 with his left hand and controls his right hand to make the center of the brush spring 8 fit on the brush spring positioning post 9 of the brush holder bracket 10. During this process, the tail end of the brush spring 8 contacts the brush holder bracket 10 and applies a reaction force to the clamping pin 41, causing the clamping pin 41 to retract into the end 2; then the operator rotates the torsion bar 3 with his right hand. The torsion bar 3 rotates relative to the sleeve 1 to continue compressing the compression spring 5. When the return force of the compression spring 5 is greater than the resistance between the tail end of the brush spring 8 and the brush holder bracket 10, the compression spring 5 drives the movable rod 4 to move in the sleeve 1, thereby causing the clamping pin 41 to extend to the outside of the end 2. The clamping pin 41 presses the brush spring 8 onto the brush holder bracket 10, thus completing the assembly of the brush spring 8.

[0032] The starter brush spring assembly fixture provided in this embodiment of the invention uses a locating pin 21 that passes through the center of the brush spring 8 to restrict its position. By rotating the torsion bar 3, the compression spring 5 provides a uniformly increased pressure, and then the clamping pin 41 assembles the brush spring 8 onto the brush holder bracket 10. Throughout the assembly process, the axial direction of the fixture remains perpendicular to the side plane of the brush spring 8. This not only prevents the brush spring 8 from ejecting, ensuring safety during assembly, but also avoids damage to the brush spring plating and the spring shape, ensuring the elasticity of the piezoelectric brush and thus guaranteeing the motor's service life. Compared to the traditional method of assembling brush springs using clamps, the starter brush spring assembly fixture provided in this embodiment of the invention requires less operator skill; simply rotating the torsion bar 3 is sufficient for brush spring assembly, making it simple, convenient, and improving production efficiency.

[0033] See Figure 1 , Figure 2 , Figure 3 The starter brush spring assembly fixture provided in this embodiment of the invention includes an elongated groove 11 on the sleeve 1 that communicates with the inner cavity of the sleeve 1 and extends along the axial direction of the sleeve 1; and a limiting pin 6 on the movable rod 4 that is located within the elongated groove 11 and can move along the elongated groove 11. Preferably, two elongated grooves 11 are symmetrically arranged on the sleeve 1.

[0034] When the movable rod 4 reciprocates within the sleeve 1, it drives the limiting pin 6 to reciprocate within the elongated groove 11. This utilizes the cooperation between the limiting pin 6 and the elongated groove 11 to ensure that the movable rod 4 can only reciprocate along the axial direction of the sleeve 1 and cannot rotate relative to the sleeve 1. Consequently, when assembling the brush spring, it ensures that the clamping pin 41 only applies a force along the axial direction of the sleeve 1 to the brush spring, avoiding other unnecessary forces.

[0035] See Figure 2 , Figure 5 , Figure 6 The starter brush spring assembly fixture provided in this embodiment of the invention has a first cavity 42 on the movable rod 4 opposite to the end of the compression spring 5; and a second cavity 31 on the torsion bar 3 opposite to the compression spring 5. The two ends of the compression spring 5 are respectively disposed in the first cavity 42 and the second cavity 31. By disposing the two ends of the compression spring 5 in the first cavity 42 and the second cavity 31, the reliability of the compression spring 5 after installation is improved. Of course, in other embodiments, the two ends of the compression spring 5 can respectively abut against the movable rod 4 and the torsion bar 3.

[0036] See Figure 2 , Figure 3 The starter brush spring assembly fixture provided in this embodiment of the invention includes a first section 12 and a second section 13 connected in sequence in the inner cavity of the sleeve 1; the diameter of the first section 12 is larger than the diameter of the second section 13; the end of the torsion bar 3 is threadedly connected to the first section 12 in the inner cavity of the sleeve 1; and the movable rod 4 is slidably fitted in the second section 13 in the inner cavity of the sleeve 1.

[0037] The first section 12 of the inner cavity of the sleeve 1 is provided with an internal thread section; one end of the torsion bar 3 is provided with an external thread section that is adapted to the internal thread section; the connection between the internal thread section and the external thread section is achieved by connecting the sleeve 1 and the torsion bar 3, and the length of the end of the torsion bar 3 extending into the sleeve 1 can be adjusted by rotating the torsion bar 3.

[0038] The movable rod 4 is slidably fitted in the second section 13 of the inner cavity of the sleeve 1, allowing the movable rod 4 to reciprocate within the sleeve 1. In one embodiment, the second section 13 is a section of equal diameter, and the diameter of the movable rod 4 is adapted to the diameter of the second section 13, enabling the movable rod 4 to reciprocate within the sleeve 1. In this embodiment, the second section 13 includes two cylindrical sections whose diameter decreases sequentially from the torsion bar 3 to the end 2, and the movable rod 4 includes two cylindrical sections whose diameter decreases sequentially from the torsion bar 3 to the end 2. The diameters of the two cylindrical sections of the movable rod 4 are adapted to the diameters of the two cylindrical sections of the second section 13.

[0039] See Figure 5 The starter brush spring assembly fixture provided in this embodiment of the invention includes a torsion bar 3 comprising a gripping section 32 and a connecting section 33 connected in sequence; the connecting section 33 of the torsion bar 3 is threadedly connected to the first section 12 of the inner cavity of the sleeve 1; the cross-sectional dimension of the gripping section 32 is larger than the cross-sectional dimension of the connecting section 33.

[0040] The gripping section 32 is for the operator to hold, and the connecting section 33 is for connecting to the sleeve 1. The first section 12 of the inner cavity of the sleeve 1 is provided with an internal thread section, and the connecting section 33 is provided with an external thread section that matches the internal thread section; the connection between the internal thread section and the external thread section realizes the threaded connection between the sleeve 1 and the torsion bar 3. The cross-sectional dimension of the gripping section 32 is larger than that of the connecting section 33, which increases the contact area between the operator and the gripping section 32, making it easier for the operator to hold.

[0041] See Figure 5 The torsion bar 3 further includes a guide section 34 connected to the connecting section 33; the guide section 34 is slidably fitted in the second section 13 of the inner cavity of the sleeve 1. The second cavity 31 is disposed on the guide section 34. By providing the guide section 34, when the torsion bar 3 is rotated, the stability and reliability of the guide section 34's movement within the sleeve 1 are ensured by the guiding action of the guide section 34 and the second section 13.

[0042] See Figure 1 , Figure 5 The outer surface of the grip section 32 is provided with anti-slip texture 35. The anti-slip texture 35 is formed by rolling. By providing the anti-slip texture 35, when the operator grips the grip section 32, the friction between the operator and the grip section 32 can be increased, preventing slippage.

[0043] See Figure 1 , Figure 2 , Figure 4 The end of the sleeve 1 facing the end of the end 2 is provided with a groove 23; the front end of the sleeve 1 extends into the groove 23 of the end 2 and is fixedly connected to the end 2. The sleeve 1 and the end 2 are fixedly connected by a pin 7.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A starter motor brush spring assembly fixture, characterized in that, It includes a sleeve (1), an end (2), a torsion bar (3), a movable rod (4), and a compression spring (5); The end (2) is installed at the front end of the sleeve (1); one end of the torsion bar (3) extends from the rear end of the sleeve (1) into the sleeve (1) and is threadedly connected to the sleeve (1); the movable rod (4) is disposed in the sleeve (1) and can move along the axial direction of the sleeve (1); the compression spring (5) is disposed in the sleeve (1) and is located between the movable rod (4) and the torsion bar (3); The end (2) away from the sleeve (1) has a positioning pin (21) extending axially along the sleeve (1); a sliding hole (22) is provided on the end (2) and on one side of the positioning pin (21); a clamping pin (41) is provided on the movable rod (4) passing through the sliding hole (22) and extending to the outside of the end (2). The sleeve (1) is provided with a long strip groove (11) that communicates with the inner cavity of the sleeve (1) and extends along the axial direction of the sleeve (1); the movable rod (4) is provided with a limiting pin (6) located in the long strip groove (11) and movable along the long strip groove (11).

2. The starter brush spring assembly fixture according to claim 1, characterized in that, Two elongated grooves (11) are symmetrically arranged on the sleeve (1).

3. The starter brush spring assembly fixture according to claim 1, characterized in that, A first cavity (42) is provided on the movable rod (4) at the end opposite to the compression spring (5); a second cavity (31) is provided on the torsion rod (3) at the end opposite to the compression spring (5); the two ends of the compression spring (5) are respectively located in the first cavity (42) and the second cavity (31).

4. The starter brush spring assembly fixture according to claim 1, characterized in that, The inner cavity of the sleeve (1) includes a first section (12) and a second section (13) connected in sequence; the diameter of the first section (12) is larger than the diameter of the second section (13); the end of the torsion bar (3) is threadedly connected to the first section (12) of the inner cavity of the sleeve (1); the movable rod (4) is slidably fitted in the second section (13) of the inner cavity of the sleeve (1).

5. The starter brush spring assembly fixture according to claim 4, characterized in that, The torsion bar (3) includes a gripping section (32) and a connecting section (33) connected in sequence; the connecting section (33) of the torsion bar (3) is threadedly connected to the first section (12) of the inner cavity of the sleeve (1); the cross-sectional dimension of the gripping section (32) is larger than the cross-sectional dimension of the connecting section (33).

6. The starter brush spring assembly fixture according to claim 5, characterized in that, The torsion bar (3) also includes a guide section (34) connected to the connecting section (33); the guide section (34) is slidably fitted in the second section (13) of the inner cavity of the sleeve (1).

7. The starter brush spring assembly fixture according to claim 5, characterized in that, The outer surface of the grip section (32) is provided with anti-slip texture (35).

8. The starter brush spring assembly fixture according to claim 1, characterized in that, The end (2) facing the sleeve (1) is provided with a groove (23); the front end of the sleeve (1) extends into the groove (23) of the end (2) and is fixedly connected to the end (2).

9. The starter brush spring assembly fixture according to claim 8, characterized in that, The sleeve (1) and the end (2) are fixedly connected by a pin (7).

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