Shaft assembly tool

Abstract

The utility model discloses a kind of assembly tool for shaft parts assembly clamping spring, including guide sleeve and press-fit assembly;The outer surface of the guide sleeve has axially inclined guide surface, in use, the guide sleeve is sleeved on the shaft parts and the end of guide surface is located at the position of shaft parts installation clamping spring;The press-fit assembly is used to push the clamping spring pre-sleeved on guide surface along guide surface at the position of shaft parts installation clamping spring;Can reduce the deformation condition of clamping spring clamp piece, reduce the scrap rate of parts.

Description

Technical Field

[0001] This utility model relates to the field of snap ring installation for shaft parts, and specifically to an assembly fixture for assembling snap rings on shaft parts. Background Technology

[0002] The existing shaft snap ring press-fit fixture consists of a guide sleeve and a press-fit assembly. In use, the guide sleeve is fitted onto the shaft, the snap ring is fitted onto the guide sleeve, and the press-fit assembly is placed on the guide sleeve and presses the snap ring into place downwards.

[0003] The inner diameter of this press-fit assembly is fixed and is limited by the outer diameter of the retaining ring and the outer diameter of the shaft. The outer diameter of the shaft is less than the inner diameter of the press-fit assembly and less than the outer diameter of the retaining ring. When the difference between the outer diameter of the retaining ring and the outer diameter of the shaft is small, the press-fit assembly can only contact a very small part of the outermost ring of the retaining ring, which causes the retaining ring to be flipped inward under force during press-fitting and the clamping part to deform.

[0004] Therefore, to solve the above problems, an assembly tooling is needed for assembling snap rings on shaft parts, which can reduce the deformation of snap rings and reduce the scrap rate of parts. Utility Model Content

[0005] In view of this, the purpose of this utility model is to overcome the defects in the prior art and provide an assembly fixture for assembling snap rings on shaft parts, thereby reducing the deformation of snap rings and reducing the scrap rate of parts.

[0006] The present invention relates to an assembly fixture for assembling snap rings on shaft parts, comprising a guide sleeve and a press-fit assembly.

[0007] The outer surface of the guide sleeve has an axially inclined guide surface. In use, the guide sleeve is fitted onto the shaft part and the end of the guide surface is located at the position where the snap ring is installed on the shaft part.

[0008] The press-fit assembly is used to push the snap ring, which is pre-fitted on the guide surface, along the guide surface to the position where the snap ring is installed on the shaft part.

[0009] Furthermore, the press-fit assembly includes a press sleeve, a press claw, and an elastic element;

[0010] The pressure sleeve is slidably disposed on the guide sleeve in a vertical direction, the pressure claw is disposed on the pressure sleeve, and the pressure claw is driven to move closer to or away from the central axis of the guide sleeve;

[0011] The elastic element is disposed on the guide sleeve and has a preload force that brings the pressure claw close to the guide surface;

[0012] The pressure claw has a pressing end for pushing the retaining spring;

[0013] In use, the guide sleeve is fitted onto the shaft part, the snap ring is fitted onto the guide sleeve, the pressure claw is located on top of the snap ring and is pressed against the guide surface by the elastic element, and the driving pressure sleeve slides in the vertical direction so that the pressing end of the pressure claw assembles the snap ring onto the shaft part.

[0014] Furthermore, the pressure sleeve has a circumferentially formed assembly groove, and the pressure claw is set in the assembly groove by a connecting pin. The end of the pressure claw located at the bottom of the connecting pin is the pressing end. The pressure claw is driven to swing around the axis of the connecting pin so that the pressing end moves closer to or away from the central axis of the guide sleeve.

[0015] Furthermore, the assembly groove extends through the side wall of the pressure sleeve, and when the pressing end approaches or moves away from the central axis of the guide sleeve, the pressing claw is guided by the side wall of the assembly groove.

[0016] The elastic element is located on the outside of the assembly groove and is encircled by the pressure sleeve. The elastic element is also located on the inside of the connecting pin.

[0017] Furthermore, the pressure claws are a plurality of claws evenly distributed around the circumference of the pressure sleeve; the plurality of pressure claws are limited by the same elastic element.

[0018] Furthermore, the outer surface of the pressure sleeve protrudes outward to form a mounting seat, and the pressure claw is set on the mounting seat by a connecting pin. The outer surface of the pressure sleeve is recessed inward in an annular shape to form a limiting groove, and the elastic element is set in the limiting groove. The mounting seat is located at the top of the limiting groove.

[0019] Furthermore, the clamping end includes an inner end angle at the bottom of the clamping claw, and the inner end angle is an arc angle.

[0020] Furthermore, the top end of the pressure sleeve has a pressing handle, the pressing handle has a guide groove, the guide sleeve has a guide rod located at the top of the guide surface, the guide rod is disposed in the guide groove so that the guide groove is guided by the guide rod when the pressure sleeve is driven to slide in the vertical direction.

[0021] Furthermore, the guide sleeve includes an inlet section and an outlet section, with the outlet section connected to the bottom of the inlet section; the inlet section is a frustum-shaped cone with a smaller top and a larger bottom, and the outlet section is a cylinder with the same diameter as the bottom edge of the inlet section, with the outer surface of the inlet section serving as a guide surface.

[0022] Furthermore, the top surface of the introduced section transitions to the guide surface through an arc-shaped curved surface.

[0023] Furthermore, the bottom of the guide sleeve has a primary cavity for fitting shaft-like parts, and the bottom of the pressure sleeve has a secondary cavity for fitting the guide sleeve.

[0024] The beneficial effects of this utility model are as follows: The assembly tool disclosed in this utility model for assembling retaining rings on shaft parts, through the cooperation of the guide surface and the pressure claw set on the pressure sleeve by the elastic element, allows the pressure claw used to push the retaining ring into the shaft part to change its diameter independently. This ensures that the pressure claw continuously supports the retaining ring during the process of pushing the retaining ring into the shaft part, ensuring the reliability of the retaining ring under force during the press-fitting process, and preventing the retaining ring from turning inward under force and the retaining part from deforming, thereby reducing the scrap rate of parts. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0027] Figure 2 This utility model Figure 1 Structural diagram;

[0028] Figure 3 This utility model Figure 2 A schematic diagram of the AA-direction structure;

[0029] Figure 4 This utility model Figure 2 Schematic diagram of the structure at point I;

[0030] Figure 5 This is a schematic diagram of the structure of the pressure sleeve of this utility model;

[0031] Figure 6 This utility model Figure 5 Front view structural diagram;

[0032] Figure 7 This utility model Figure 6 Schematic diagram of the BB-oriented structure;

[0033] Figure 8 This is a schematic diagram of the structure of the pressure claw of this utility model.

[0034] Figure 9 This is a schematic diagram of the structure when the present invention is in use. Figure 1 ;

[0035] Figure 10 This is a schematic diagram of the structure when the present invention is in use. Figure 2 .

[0036] Reference numerals: Shaft parts 001, snap ring 002, guide sleeve 1, guide surface 11, guide rod 12, lead-in section 13, lead-out section 14, pressure sleeve 2, secondary cavity 21, assembly groove 22, mounting base 23, limiting groove 24, pressing handle 25, guide groove 26, pressure claw 3, pressing end 31, notch 32, elastic element 4, connecting pin 5. Detailed Implementation

[0037] Figure 1 As shown in the figure, the assembly fixture for assembling snap rings 002 for shaft parts in this embodiment includes a guide sleeve 1 and a press-fit assembly; the outer surface of the guide sleeve 1 has an axially inclined guide surface 11, which, in use, ... Figure 9 and Figure 10 The guide surface 11 is conical and slopes outward from top to bottom. The guide sleeve 1 is sleeved on the shaft part 001 and the end of the guide surface 11 is located at the position where the circlip 002 is installed on the shaft part 001. The press-fit assembly is used to push the circlip 002 pre-sleeved on the guide surface 11 along the guide surface 11 to the position where the circlip 002 is installed on the shaft part 001. The press-fit assembly can be a pull-type structure with a clamp and a cable. In use, the clamp is connected to the retaining spring 002, and the connection method can be clamping or hook locking, etc. The cable pulls the retaining spring 002 into the position where the retaining spring 002 is installed on the shaft part 001 from one side. Alternatively, the press-fit assembly can also be a push-in structure with a pressure block and a pressure sleeve. In use, the pressure block is connected to the retaining spring 002, and the connection method can be pressing and holding or magnetic attraction, etc. The pressure block pushes the retaining spring 002 into the position where the retaining spring 002 is installed on the shaft part 001 from the side away from the shaft part 001. Or other structural forms are preferred to achieve the purpose of this solution, which will not be described in detail here. It should be understood that the press-fit assembly has a variable diameter function so that the snap ring 002 can be continuously delivered to the position where the snap ring 002 is installed on the shaft part 001 as the size of the guide surface 11 expands, ensuring the reliability of the snap ring 002 under force during the press-fit process, reducing the deformation of the snap ring 002 during the assembly process, completing effective assembly, and reducing the scrap rate of parts.

[0038] In this embodiment, the outer surface of the guide sleeve 1 has a guide surface 11 that slopes outward from top to bottom. This guide surface 11 can be an elongated outer surface, or it can be a groove with the bottom of the groove serving as the guide surface, or a conical guide surface, etc., to achieve the function of guiding the retaining ring. Further details are omitted here. The upper and lower dimensions correspond to this solution. Figure 1 The "inner" direction refers to the direction close to the central axis of the guide sleeve 1, while the "outer" direction is opposite to the "inner" direction, which will not be elaborated further here.

[0039] In this embodiment, the press-fit assembly includes a press sleeve 2, a press claw 3, and an elastic element 4. The press sleeve 2 is driven to slide vertically on the guide sleeve 1. The press claw 3 is disposed on the press sleeve 2 and is driven to approach or move away from the central axis of the guide sleeve 1. The elastic element 4 is disposed on the guide sleeve 1 and has a preload force to bring the press claw 3 closer to the guide surface 11. The press claw 3 has a pressing end 31 for pushing the retaining ring 002. In use, the guide sleeve 1 is fitted onto the shaft part 001, the retaining ring 002 is fitted onto the guide sleeve 1, the press claw 3 is located on top of the retaining ring 002 and is pressed against the guide surface 11 by the elastic element 4, and the press sleeve 2 is driven to slide vertically so that the pressing end 31 of the press claw 3 assembles the retaining ring 002 onto the shaft part 001.

[0040] The elastic element 4 possesses a certain elasticity and restoring capability. Preferably, it is a spring or a rubber component. This allows the mating structure between the pressure claw 3 and the elastic element 4 to be either a pressure claw 3 with a spring-assisted support structure, or a pressure claw 3 with a rubber pad-assisted support structure, etc. This enables the pressure claw 3 to automatically abut against the guide surface 11 during use. As the guide surface 11 increases in size from top to bottom, it gradually pushes the retaining ring 002 located on the guide surface 11 into the position where the retaining ring 002 is installed on the shaft part 001. Further details are omitted here. This solution, through the cooperation of the guide surface 11 and the pressure claw 3 set on the pressure sleeve 2 via the elastic element 4, allows the pressure claw 3, used to push the retaining ring 002 into the shaft part 001, to automatically change its diameter. This ensures that during the process of pushing the retaining ring 002 into the shaft part 001, the pressure claw 3 continuously abuts the retaining ring 002, guaranteeing the reliability of the retaining ring 002's force during the press-fitting process and preventing the retaining ring 002 from flipping inward under force or deforming the retaining component, thus reducing the scrap rate of parts.

[0041] In this embodiment, the bottom of the pressure sleeve 2 is provided with a secondary cavity 21 for fitting the guide sleeve 1. In use, the pressure sleeve 2 is fitted onto the guide sleeve 1 through the secondary cavity 21. The pressure sleeve 2 is provided with a circumferential assembly groove 22. The assembly groove 22 is located at the bottom of the pressure sleeve 2 and extends through the side wall of the pressure sleeve 2 to the secondary cavity 21. The pressure claw 3 is set in the assembly groove 22 by a connecting pin 5. The end of the pressure claw 3 at the bottom of the connecting pin 5 is the pressing end 31. The bottom of the assembly groove 22 is open. The pressure claw 3 is driven to swing around the axis of the connecting pin 5 so that the pressing end 31 moves closer to or away from the central axis of the guide sleeve 1. When the pressing end 31 moves closer to or away from the central axis of the guide sleeve 1, the pressure claw 3 is guided by the side wall of the assembly groove 22.

[0042] More specifically, the outer surface of the pressure sleeve 2 protrudes outward to form a mounting base 23, which is located on the top of the pressure sleeve 2. The top of the assembly groove 22 extends to the mounting base 23. The top of the pressure claw 3 is set on the mounting base 23 via a connecting pin 5. The outer end face of the pressure claw 3 is inclined from top to bottom and then inward to reduce material consumption and improve the aesthetics of the structure. Several pressure claws 3 are evenly distributed around the circumference of the pressure sleeve 2 to ensure a more uniform pressing force on the retaining spring 002, thereby improving assembly reliability and quality. The elastic element 4 is located in the assembly groove 2. The outer ring of 2 is fitted onto the pressure sleeve 2, and the elastic element 4 is also located inside the connecting pin 5. The elastic element 4 is a rubber ring that fits around the pressure sleeve 2. In use, several of the pressure claws 3 are limited by the same elastic element 4. The elasticity of the rubber ring prevents the pressure claws 3 from excessively expanding outward during the process of pushing the snap ring 002 into the shaft part 001, forming a variable diameter structure that continuously holds the snap ring 002. This allows the snap ring 002 to be delivered to the preset position of the shaft part 001 more smoothly and reliably, making it more convenient to use. The snap ring 002 has a better assembly quality and can reduce the scrap rate of parts.

[0043] In this embodiment, the outer surface of the pressure sleeve 2 is recessed inward in an annular shape to form a limiting groove 24. The limiting groove 24 is located at the bottom of the pressure sleeve 2, and the elastic element 4 is set in the limiting groove 24. This enhances the constraint ability on the elastic element 4 and improves the reliability of the entire tooling. The mounting base 23 is located at the top of the limiting groove 24. The pressure claw 3 has a notch 32 for guiding the elastic element 4. During use, as the pressure claw 3 expands outward, the elastic element 4 also expands outward accordingly. The notch 32 on the pressure claw 3 can further enhance the constraint ability on the elastic element 4, prevent detachment during use, and improve the assembly quality and efficiency of the snap ring 002.

[0044] In this embodiment, the clamping end 31 includes an inner corner at the bottom of the clamping claw 3. The clamping end also includes a bottom surface and a side surface connected by the inner corner at the bottom of the clamping claw 3. The inner corner is an arc angle. In use, the arc angle and the bottom surface and side surface connected by the arc angle continuously press against the retaining spring 002, pushing the retaining spring 002 to a preset position on the shaft part 001. The inner side surface of the clamping claw is close to the guide surface, and the bottom surface of the clamping claw is close to the retaining spring. This reduces surface damage to the retaining spring 002, improves product quality, and the arc angle also improves the smoothness of the press-fit assembly and increases the assembly efficiency of the retaining spring 002 on the shaft part 001.

[0045] In this embodiment, the top of the pressure sleeve 2 has a pressing handle 25, the longitudinal section of which is "T"-shaped, which improves the reliability of gripping during use and can be connected to the drive device according to the actual situation, thus enhancing its versatility. The pressing handle 25 has a guide groove 26 that communicates with the secondary cavity 21. The guide sleeve 1 has a guide rod 12 located at the top of the guide surface 11. The length of the guide rod 12 does not exceed the length of the guide groove 26, improving operational safety. The guide rod 12 is disposed in the guide groove 26 so that the guide groove 26 is guided by the guide rod 12 when the pressure sleeve 2 is driven to slide in the vertical direction. This improves the stability of the force applied to the snap ring 002, enhances the reliability of pressing the snap ring 002, and improves the assembly quality and efficiency of the snap ring 002.

[0046] In this embodiment, the bottom of the guide sleeve 1 has a primary cavity for fitting the shaft part 001. When in use, the guide sleeve 1 is fitted onto the shaft part 001 through the primary cavity. The guide sleeve 1 includes an inlet section 13 and an outlet section 14. The outlet section 14 is connected to the bottom of the inlet section 13. The inlet section 13 is a frustum-shaped cone with a smaller top and a larger bottom. The outlet section 14 is a cylinder with the same diameter as the bottom edge of the inlet section 13. The outer circumferential surface of the inlet section 13 is a guide surface 11. The top surface of the inlet section 13 transitions to the guide surface 11 through an arc-shaped curved surface. The guide rod 12 is connected to the top surface of the inlet section 13.

[0047] More specifically, the guide sleeve 1 is a rotating body with a central axis. The guide rod 12, the inlet section 13, and the outlet section 14 are located on the same central axis. The guide rod 12 is rod-shaped and located at the top of the guide sleeve 1. The inlet section 13 is located at the bottom of the guide rod 12, and the outer circumferential surface of the inlet section 13 is a conical surface serving as the guide surface 11. The outlet section 14 is located at the bottom of the inlet section 13, and the outer circumferential surface of the outlet section 14 is a cylindrical surface. A primary cavity is correspondingly opened at the bottom of the guide sleeve 1 for fitting shaft-type parts 001. A secondary cavity 21 is correspondingly opened at the bottom of the pressure sleeve 2 for fitting the guide sleeve 1. A secondary cavity 21 is also provided for guiding the guide rod 12, and a guide groove 26 is provided for guiding the guide rod 12. The pressure sleeve 2 is also a rotating body with a central axis, and the central axis of the pressure sleeve 2 coincides with the central axis of the guide sleeve 1 when in use. There are three pressure claws 3 evenly distributed around the circumference of the pressure sleeve 2. The three pressure claws 3 are limited by the same elastic element 4. The elastic element 4 has elastic force so that the pressure claw 3 with the pressing end 31 continuously abuts against the inclined guide surface 11 of the guide sleeve 1 when in use, thereby continuously and stably pressing the snap ring 002 to the shaft part 001 in a variable diameter manner. The whole pressing process is efficient and stable, which can improve the quality of the finished product.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An assembly fixture for assembling snap rings on shaft-type parts, characterized in that: Includes guide sleeves and press-fit components; The outer surface of the guide sleeve has an axially inclined guide surface. In use, the guide sleeve is fitted onto the shaft part and the end of the guide surface is located at the position where the snap ring is installed on the shaft part. The press-fit assembly is used to push the snap ring, which is pre-fitted on the guide surface, along the guide surface to the position where the snap ring is installed on the shaft part.

2. The assembly fixture for assembling snap rings on shaft parts according to claim 1, characterized in that: The press-fit assembly includes a press sleeve, press claws, and an elastic element; The pressure sleeve is slidably disposed on the guide sleeve in a vertical direction, the pressure claw is disposed on the pressure sleeve, and the pressure claw is driven to move closer to or away from the central axis of the guide sleeve; The elastic element is disposed on the guide sleeve and has a preload force that brings the pressure claw close to the guide surface; The pressure claw has a pressing end for pushing the retaining spring; In use, the guide sleeve is fitted onto the shaft part, the snap ring is fitted onto the guide sleeve, the pressure claw is located on top of the snap ring and is pressed against the guide surface by the elastic element, and the driving pressure sleeve slides in the vertical direction so that the pressing end of the pressure claw assembles the snap ring onto the shaft part.

3. The assembly fixture for assembling snap rings on shaft parts according to claim 2, characterized in that: The pressure sleeve has a circumferentially provided assembly groove, and the pressure claw is set in the assembly groove by a connecting pin. The end of the pressure claw located at the bottom of the connecting pin is the pressing end. The pressure claw is driven to swing around the axis of the connecting pin so that the pressing end moves closer to or away from the central axis of the guide sleeve.

4. The assembly fixture for assembling snap rings on shaft parts according to claim 3, characterized in that: The assembly groove extends through the side wall of the pressure sleeve. When the pressing end moves closer to or further away from the central axis of the guide sleeve, the pressing claw is guided by the side wall of the assembly groove. The elastic element is located on the outside of the assembly groove and is encircled by the pressure sleeve. The elastic element is also located on the inside of the connecting pin.

5. The assembly fixture for assembling snap rings on shaft parts according to claim 3, characterized in that: The pressure claws are a plurality of them evenly distributed around the circumference of the pressure sleeve; the plurality of pressure claws are limited by the same elastic element.

6. The assembly fixture for assembling snap rings on shaft parts according to claim 5, characterized in that: The outer surface of the pressure sleeve protrudes outward to form a mounting seat. The pressure claw is set on the mounting seat by a connecting pin. The outer surface of the pressure sleeve is recessed inward in an annular shape to form a limiting groove. The elastic element is set in the limiting groove. The mounting seat is located at the top of the limiting groove.

7. The assembly fixture for assembling snap rings on shaft parts according to claim 2, characterized in that: The clamping end includes an inner end angle at the bottom of the clamping claw, and the inner end angle is an arc angle.

8. The assembly fixture for assembling snap rings on shaft parts according to claim 2, characterized in that: The top end of the pressure sleeve has a pressing handle, the pressing handle has a guide groove, the guide sleeve has a guide rod located at the top of the guide surface, the guide rod is disposed in the guide groove so that the guide groove is guided by the guide rod when the pressure sleeve is driven to slide in the vertical direction.

9. The assembly fixture for assembling snap rings on shaft parts according to claim 2, characterized in that: The guide sleeve includes an inlet section and an outlet section, with the outlet section connected to the bottom of the inlet section. The inlet section is a frustum-shaped cone with a smaller top and a larger bottom, and the outlet section is a cylinder with the same diameter as the bottom edge of the inlet section. The outer surface of the inlet section is a guide surface.

10. The assembly fixture for assembling snap rings on shaft parts according to claim 9, characterized in that: The top surface of the inlet section transitions to the guide surface via an arc-shaped curved surface.

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