Assembly tool for preventing motor belt pulley from being damaged by collision

Abstract

The invention discloses an assembly tool for preventing a motor belt pulley from being bumped, which comprises a workbench, a positioning ring, a tray and a buffer block, the workbench is provided with a first through hole, the positioning ring is fixed with the workbench and surrounds the first through hole, the tray is matched with the positioning ring, the tray is provided with a second through hole for the belt pulley to pass through, and the buffer block is arranged in the second through hole. The tray is provided with a plurality of radial protrusions located on the inner wall of the second through hole and used for supporting the front end cover of the motor, an assembly groove is formed between every two adjacent radial protrusions, the buffer blocks are matched with the assembly grooves, and the radius of the buffer blocks is smaller than that of the radial protrusions. In the process that the belt pulley penetrates through or retreats from the positioning ring, the belt pulley can be prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the field of motor assembly, and in particular to an assembly tool for preventing a motor pulley from being damaged. Background Art

[0002] The car alternator is the main power source of the car. Its function is to supply power to all electrical devices (except the starter) and charge the battery when the engine is running normally.

[0003] The AC generator is usually equipped with a pulley, which is connected to the engine crankshaft through a belt. After the engine is started, the generator drives the rotor to rotate through the belt, thereby generating current. The pulley is fixed to the rotor shaft in the AC generator as a whole. The pulley and the rotor shaft are usually manufactured separately. During installation, the pulley is put on the rotor shaft and matched with the rotor shaft, and then the nut is used to thread the rotor shaft to prevent the pulley from axial movement.

[0004] Normally, the rotor shaft of the AC generator is passed through a workbench with a positioning ring. Since the outer diameter of the pulley of half of the products is too large, the maximum inner diameter of the positioning ring is Φ78, with only a 2mm gap between the pulley and the single-side gap is 1mm. Before tightening the pulley and the rotor shaft, the pulley is pre-installed on the rotor shaft. Therefore, the pulley and the rotor shaft need to pass through the positioning ring, and the front cover of the AC generator is supported on the positioning ring. When the pulley and the rotor shaft are tightened, the AC generator needs to be removed from the workbench as a whole, and the pulley needs to be withdrawn from the tray. The above-mentioned process of placing and removing the AC generator is all manually operated. When putting down or taking out the product manually, the pulley and the positioning ring are easy to collide, causing the pulley to be scratched and exposed. When using it, the pulley is exposed and rusted, resulting in rework and repair. A large amount of rework and repair is also very likely to lead to the outflow of defective products. Summary of the invention

[0005] The invention provides an assembly tool for preventing a motor pulley from being damaged. The invention can prevent the pulley from being damaged during the process of the pulley passing through or exiting a positioning ring.

[0006] The technical solutions to the above problems are as follows: An assembly tool for preventing a motor pulley from being damaged comprises a workbench and a positioning ring. The workbench is provided with a first through hole. The positioning ring is fixed to the workbench and surrounds the first through hole. The assembly tool also comprises a tray and a buffer block. The tray cooperates with the positioning ring. The tray is provided with a second through hole for the pulley to pass through. The tray is provided with a plurality of radial protrusions located on the inner wall of the second through hole and used to support the front end cover of the motor. An assembly groove is formed between two adjacent radial protrusions. The buffer block cooperates with the assembly groove. The radius of the buffer block is smaller than the radius of the radial protrusion.

[0007] Furthermore, a support plate for supporting the buffer block is also provided on the tray, at least a portion of the support plate is located in the assembly groove, and the support plate is fixed to the inner wall of the second through hole and / or the radially protruding side wall.

[0008] Furthermore, an axial protrusion is provided on the axial end surface of the buffer block, a notch is provided on the support plate, and the axial protrusion passes through the notch and extends to the outside of the axial end surface of the tray.

[0009] Furthermore, the difference between the radius of the radial protrusion and the radius of the buffer block is at least 1 mm.

[0010] Furthermore, it also includes a first component for positioning and supporting the rear end cover of the motor, the first component includes a first support, a first plug-in component, and a first positioning pin. The first support is fixed to the workbench, and a plurality of the first plug-in components are arranged on the circumferential surface of the first support. The first plug-in component is provided with a first socket, one end of the first positioning pin is plugged into and matched with the first socket, and the other end of the first positioning pin is used to plug and match with the rear end cover of the motor.

[0011] Furthermore, it also includes a second component for positioning and supporting the motor cover, the second component includes a second support, a positioning column, and an elastic component, the second support is fixed to the workbench, the positioning column is fixed to the second support, and the second support is provided with a plurality of step holes located around the positioning column, and an elastic component is installed in each step hole.

[0012] Furthermore, the elastic component includes a spring, a sleeve, and a second positioning pin. One end of the sleeve is clearance-matched with the step hole. The spring is located in the sleeve. One end of the spring is matched with the step of the step hole. One end of the second positioning pin is located in the sleeve. The other end of the second positioning pin is located outside the sleeve. A boss is provided on the circumferential surface of the second positioning pin. The spring is sleeved on the second positioning pin. The other end of the spring is matched with the boss.

[0013] In the present invention, since the inner diameter of the second through hole is smaller than the inner diameter of the first through hole and the positioning ring, and the radius of the buffer block is smaller than the radius of the radial protrusion, whether the product is taken away from the pallet or passed through the pallet manually, if the pulley is accidentally collided, the pulley can only collide with the buffer block first. Since the hardness of the buffer block is much lower than the hardness of the pulley, the buffer block can prevent the pulley from being damaged by hard collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the assembly tooling used to prevent the motor pulley from being damaged and the motor after assembly.

[0015] Figure 2 The top view of the assembly tooling used to prevent the motor pulley from being damaged and the motor after assembly.

[0016] Figure 3 For along Figure 2 Cross-section along line AA.

[0017] Figure 4 For along Figure 2 Cross-section along line BB.

[0018] Figure 5 A three-dimensional image of a tray.

[0019] Figure 6 A three-dimensional diagram of a buffer block.

[0020] Markings in the accompanying drawings: Workbench 1, first through hole 1a, spacer 2, tray 3, second through hole 3a, radial protrusion 3b, assembly groove 3c, support plate 3d, notch 3e, buffer block 4, axial protrusion 4a, first support 5, first plug-in component 6, first locating pin 7, second support 8, locating column 9, spring 10, sleeve 11, second locating pin 12, boss 12a, third support 13, third support rod 14, fourth support 15, core shaft 16, flange 17, hollow tube 18, fifth support 19, shaft 20, pulley A, motor front end cover B, motor rear end cover C, motor cover D, insulating sleeve E, corrugated washer F. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the examples of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other implementation methods can be obtained according to the drawings in the specification without paying creative work, and these implementation methods are still within the protection scope of the claims of the present invention.

[0022] like Figures 1 to 6 The assembly tool for preventing the motor pulley from being damaged of the present invention comprises a workbench 1, a spacer sleeve 2, a tray 3, and a buffer block 4. The workbench 1 is provided with a first through hole 1a. The spacer sleeve 2 is fixed to the workbench 1 and surrounds the first through hole 1a. The inner diameter of the spacer sleeve 2 is equal to the inner diameter of the first through hole 1a, or the inner diameter of the spacer sleeve 2 is larger than the inner diameter of the first through hole 1a.

[0023] The tray 3 cooperates with the spacer 2. The tray 3 is provided with a second through hole 3a for the pulley A to pass through. The inner diameter of the second through hole 3a is smaller than the inner diameters of the first through hole 1a and the spacer 2. The tray 3 is provided with a plurality of radial protrusions 3b located on the inner wall of the second through hole 3a and used to support the front end cover B of the motor. An assembly groove 3c is formed between two adjacent radial protrusions 3b. The buffer block 4 cooperates with the assembly groove 3c. The material of the buffer block 4 can be resin, nylon, etc. The center of the circle corresponding to the buffer block 4 is the same as the center of the circle corresponding to the radial protrusion 3b, and the radius of the buffer block 4 is smaller than the radius of the radial protrusion 3b. The difference between the radius of the radial protrusion 3b and the buffer block 4 is at least 1mm. For example, the radius of the buffer block 4 is 38.5mm, the inner diameter of the radial protrusion 3b is 39.5mm, and the difference between the radius of the radial protrusion 3b and the buffer block 4 is 1mm.

[0024] In the present invention, since the inner diameter of the second through hole 3a is smaller than the inner diameter of the first through hole 1a and the spacer sleeve 2, and the radius of the buffer block 4 is smaller than the radius of the radial protrusion 3b, whether the product is taken away from the tray 3 or passed through the tray 3 manually, if the pulley A is accidentally colliding, the pulley A can only collide with the buffer block 4 first. Since the hardness of the buffer block 4 is much lower than the hardness of the pulley A, the buffer block 4 can prevent the pulley A from being bruised by hard collision.

[0025] The tray 3 is also provided with a support plate 3d for supporting the buffer block 4. At least a portion of the support plate 3d is located in the assembly groove 3c, and the support plate 3d is fixed to the inner wall of the second through hole 3a and / or the side wall of the radial protrusion 3b. The buffer block 4 is supported by the support plate 3d to prevent the buffer block 4 from falling.

[0026] An axial protrusion 4a is provided on the axial end surface of the buffer block 4, and a notch 3e is provided on the support plate 3d. The axial protrusion 4a passes through the notch 3e and extends to the outside of the axial end surface of the tray 3. For example, an axial protrusion 4a is provided on the lower side of the buffer block 4, and the axial protrusion 4a extends below the axial end surface of the tray 3, thereby further preventing the pulley A from colliding with the metal parts on the assembly tooling.

[0027] When the pulley A is fixed to the rotor shaft, the rotor shaft needs to be prevented from rotating. Therefore, the rear end cover C of the motor cannot be combined and fixed with the front end cover B of the motor, and a clamping device is used to clamp the rotor. After the pulley A and the rotor shaft are assembled, the rear end cover C of the motor needs to be fixed to the front end cover B of the motor, and the motor cover D needs to be fixed to the rear end cover C of the motor. To facilitate assembly, the present invention also includes a first component for positioning and supporting the rear end cover C of the motor. The first component is located at the first corner of the workbench 1. The first component includes a first support 5, a first plug-in component 6, and a first positioning pin 7. The first support 5 is fixed to the workbench 1. A plurality of the first plug-in components 6 are arranged on the circumference of the first support 5. The first plug-in component 6 is provided with a first plug hole 6a. One end of the first positioning pin 7 is plugged in with the first plug hole 6a, and the other end of the first positioning pin 7 is used to plug in with the rear end cover C of the motor.

[0028] The rear end cover C of the motor is placed on the first support 5 in advance, and the rear end cover C of the motor is plugged into and matched with the first positioning pin 7 to prevent the rear end cover C of the motor from being separated from the first component. After the pulley A and the rotor shaft are assembled, the rear end cover C of the motor is directly extracted from the first component and fixed with the front end cover B of the motor, which is convenient and can improve the assembly efficiency.

[0029] Based on the above, the present invention also includes a second component for positioning and supporting the motor cover D. The first component is located at the second corner of the workbench 1. The second component includes a second support 8, a positioning column 9, and an elastic component. The second support 8 is fixed to the workbench 1, and the positioning column 9 is fixed to the second support 8. The second support 8 is provided with a plurality of step holes located around the positioning column 9, and an elastic component is installed in each step hole.

[0030] The elastic component includes a spring 10, a sleeve 11, and a second positioning pin 12. One end of the sleeve 11 is clearance-matched with the step hole. The spring 10 is located in the sleeve 11. One end of the spring 10 is matched with the step of the step hole. One end of the second positioning pin 12 is located in the sleeve 11. The other end of the second positioning pin 12 is located outside the sleeve 11. A boss 12a is provided on the circumferential surface of the second positioning pin 12. The spring 10 is sleeved on the second positioning pin 12. The other end of the spring 10 is matched with the boss 12a.

[0031] When the motor cover D is covered on the second component, the middle part of the motor cover D cooperates with the positioning column 9, and the positioning column 9 supports the motor cover D. The inner wall of the motor cover D also cooperates with the second positioning pin 12. The second positioning pin 12 compresses the spring 10, and supports the inner wall of the motor cover D through multiple elastic components, thereby preventing the motor cover D from rotating relative to the second component.

[0032] The present invention also includes a third component for positioning and supporting the insulating sleeve E. The third component includes a third support 13 and a third support rod 14. The third support 13 is fixed to the workbench 1, and the third support rod 14 is fixed to the third support 13. When in use, the insulating sleeve E is put on the third support rod 14. When assembling, the insulating sleeve E can be removed from the third component.

[0033] The present invention also includes a fourth component for positioning and supporting the pulley A, the fourth component is located at the third corner of the workbench 1, and the third component is located between the second component and the fourth component. The fourth component includes a fourth support 15 and a mandrel 16, the fourth support 15 is fixed to the workbench 1, one end of the mandrel 16 is fixed to the fourth support 15, and the other end of the mandrel 16 is a free end. When in use, the pulley A is sleeved on the mandrel 16, and the axial end face of the pulley A matches the axial end face of the fourth support 15.

[0034] The present invention also includes a fifth component for positioning and supporting the rotor component, the fifth component is located at the fourth corner of the workbench 1, and the fifth component includes a flange 17 and a hollow tube 18. The flange 17 is fixed to the workbench 1, one end of the hollow tube 18 is fixed to the flange 17, and the other end of the hollow tube 18 is a free end. When in use, the rotor shaft is matched with the hollow tube 18, and the flange 17 supports the rotor body.

[0035] The present invention also includes a sixth component for supporting the corrugated washer F. The sixth component is located between the first component and the fourth component. The sixth component includes a fifth support 19 and a shaft 20. The fifth support 19 is fixed to the workbench 1. One end of the shaft 20 is fixed to the fifth support 19, and the other end of the shaft 20 is a free end. When in use, the corrugated washer F is sleeved on the shaft 20, and the fifth support 19 supports the corrugated washer F.

Claims

1. An assembly tool for preventing a motor pulley from being damaged, comprising a workbench (1) and a spacer (2), wherein the workbench (1) is provided with a first through hole (1a), and the spacer (2) is fixed to the workbench (1) and surrounds the first through hole (1a), and is characterized in that: The invention also comprises a tray (3) and a buffer block (4), wherein the tray (3) cooperates with the spacer (2), the tray (3) is provided with a second through hole (3a) for the pulley (A) to pass through, the tray (3) is provided with a plurality of radial protrusions (3b) located on the inner wall of the second through hole (3a) and used to support the front end cover (B) of the motor, an assembly groove (3c) is formed between two adjacent radial protrusions (3b), the buffer block (4) cooperates with the assembly groove (3c), and the radius of the buffer block (4) is smaller than the radius of the radial protrusion (3b).

2. The assembly tool for preventing the motor pulley from being damaged according to claim 1, characterized in that: The tray (3) is also provided with a support plate (3d) for supporting the buffer block (4); at least a portion of the support plate (3d) is located in the assembly groove (3c); the support plate (3d) is fixed to the inner wall of the second through hole (3a) and / or the side wall of the radial protrusion (3b).

3. The assembly tool for preventing the motor pulley from being damaged according to claim 2, characterized in that: An axial protrusion (4a) is provided on the axial end surface of the buffer block (4), a notch (3e) is provided on the support plate (3d), and the axial protrusion (4a) passes through the notch (3e) and extends outside the axial end surface of the tray (3).

4. The assembly tool for preventing the motor pulley from being damaged according to claim 1, characterized in that: The difference between the radius of the radial protrusion (3b) and the buffer block (4) is at least 1 mm.

5. The assembly tool for preventing the motor pulley from being damaged according to claim 1, characterized in that: It also includes a first component for positioning and supporting the rear end cover (C) of the motor, the first component including a first support (5), a first plug-in component (6), and a first positioning pin (7), the first support (5) is fixed to the workbench (1), a plurality of the first plug-in components (6) are arranged on the circumferential surface of the first support (5), the first plug-in component (6) is provided with a first plug hole (6a), one end of the first positioning pin (7) is plugged into and matched with the first plug hole (6a), and the other end of the first positioning pin (7) is used for plugging and matching with the rear end cover (C) of the motor.

6. The assembly tool for preventing the motor pulley from being damaged according to claim 1, characterized in that: The invention also comprises a second component for positioning and supporting the motor cover (D), the second component comprising a second support (8), a positioning column (9), and an elastic component, the second support (8) being fixed to the workbench (1), the positioning column (9) being fixed to the second support (8), the second support (8) being provided with a plurality of step holes around the positioning column (9), and an elastic component being installed in each step hole.

7. The assembly tool for preventing the motor pulley from being damaged according to claim 6, characterized in that: The elastic component comprises a spring (10), a sleeve (11), and a second positioning pin (12); one end of the sleeve (11) is clearance-matched with the step hole; the spring (10) is located in the sleeve (11); one end of the spring (10) is matched with the step of the step hole; one end of the second positioning pin (12) is located in the sleeve (11); the other end of the second positioning pin (12) is located outside the sleeve (11); a boss (12a) is provided on the circumferential surface of the second positioning pin (12); the spring (10) is sleeved on the second positioning pin (12); the other end of the spring (10) is matched with the boss (12a).

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