Snap ring assembling tool
By designing a snap ring assembly tool with support components and protrusions, the problems of damage and safety hazards during snap ring assembly were solved, achieving stable assembly and improved safety of snap rings.
Patent Information
- Application Number
- CN202423134688.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-19
AI Technical Summary
During the assembly of retaining rings, the retaining rings are prone to violent impact and twisting due to rapid contraction, which can lead to damage and safety hazards.
Design a snap ring assembly tool, including a support member and a protrusion. The diameter of the first end of the support member gradually increases, and the protrusion is provided with a support surface and a guide surface to support and guide the snap ring during the snap ring assembly process, so as to avoid violent impact and twisting.
It effectively reduces the chance of circlip damage, minimizes safety hazards, and improves the accuracy and safety of assembly.
Smart Images
Figure CN223532364U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of assembly mechanism technology, specifically to a snap ring assembly tool. Background Technology
[0002] Snap rings are commonly used for axial positioning of workpieces such as bearings and gears. Snap rings are usually assembled in the snap ring groove of the shaft, with an interference fit at the bottom of the groove.
[0003] Currently, in the assembly process of retaining rings, retaining ring pliers or a sleeve with an outer diameter larger than the shaft's outer diameter are typically used to enlarge the inner bore of the retaining ring. When the retaining ring moves to the position directly opposite the retaining ring groove, it is quickly disengaged from the pliers or sleeve and engaged in the groove. However, the enlarged inner bore of the retaining ring, upon axial entry into the groove, causes rapid elastic contraction due to the release of external force, generating a large contraction force. This results in a violent impact between the retaining ring and the bottom of the groove, easily damaging the retaining ring and potentially producing flying flaky iron filings, posing a certain safety hazard. Furthermore, during the contraction phase, the retaining ring is in an unrestrained free state, making it prone to twisting. The increased thickness of the twisted retaining ring causes it to scrape against the groove opening, resulting in the removal of filamentous iron filings and damage to the retaining ring. Utility Model Content
[0004] In view of the above, it is necessary to propose a snap ring assembly tool to reduce the probability of snap ring damage and reduce safety hazards during snap ring installation.
[0005] This application provides a snap ring assembly tool, including a spreading member and a protrusion; the spreading member has a first end and a second end disposed opposite to each other, the diameter of the first end gradually increases along the direction from the second end toward the first end, and the first end is used to spread the snap ring; the protrusion is disposed on the periphery of the first end and protrudes from the side of the first end away from the second end along the extending direction of the spreading member, the two sides of the portion of the protrusion near the first end have a first support surface and a second support surface symmetrically disposed along the width direction of the protrusion, and the distance between the first support surface and the second support surface gradually decreases along the direction from the second end toward the first end.
[0006] In some embodiments, both the first support surface and the second support surface include an inclined portion and an arcuate portion connected to the inclined portion, the arcuate portion being located on the side of the inclined portion away from the second end.
[0007] In some embodiments, the protrusion extends toward the second end along the extension direction of the spreader, and the portion of the protrusion near the second end has a first guide surface and a second guide surface symmetrically arranged along the width direction of the protrusion, and the distance between the first guide surface and the second guide surface gradually increases along the direction from the second end toward the first end.
[0008] In some embodiments, the maximum distance between the first support surface and the second support surface is greater than or equal to the maximum width of the opening of the retaining ring when it is opened by the first end, and the maximum distance between the first guide surface and the second guide surface is less than or equal to the maximum width of the opening of the retaining ring when it is opened by the first end.
[0009] In some embodiments, the snap ring assembly tool further includes a guide block, which is disposed on the periphery of the spreader and located on the side of the protrusion away from the first end. The guide block has a first guide surface and a second guide surface symmetrically arranged along the width direction of the guide block on both sides. The distance between the first guide surface and the second guide surface gradually increases along the direction from the second end toward the first end.
[0010] In some embodiments, the first support surface and the side of the protrusion facing away from the spreader, as well as the second support surface and the side of the protrusion facing away from the spreader, both have rounded corners.
[0011] In some embodiments, the first end has an insertion portion protruding from the side opposite to the second end, which is coaxial with the spreading member.
[0012] In some embodiments, a supporting flange protrudes from the side of the first end opposite to the second end, and the peripheral sidewall of the supporting flange is connected to the peripheral sidewall of the first end.
[0013] In some embodiments, a mounting groove is provided on the periphery of the first end, the protrusion is slidably disposed in the mounting groove along the extension direction of the spreading member and protrudes from the periphery of the first end, and the snap ring assembly tool further includes an elastic member disposed in the mounting groove, and the two ends of the elastic member are respectively connected to the groove wall of the mounting groove near the second end and the protrusion.
[0014] In some embodiments, the protrusion has a guide hole, and the snap ring assembly tool further includes a connector, which passes through the guide hole and is connected to the support member. Along the extending direction of the support member, the width of the cross-section of the guide hole is greater than the width of the cross-section of the connector.
[0015] The retaining ring assembly tool of this application embodiment features a first end of a supporting member with a diameter that gradually increases away from the second end, and a protrusion with a first support surface and a second support surface is provided on the periphery of the first end of the supporting member. When the retaining ring is assembled using the retaining ring assembly tool, the retaining ring is pushed open by the first end when it moves to the first end. Before retracting, the retaining ring is supported by the first and second support surfaces. The first and second support surfaces support the retaining ring when it retracts, thereby keeping the retaining ring in a constrained state during retraction. This prevents the retaining ring from violently colliding with the bottom of the retaining ring groove, which would generate flying flaky iron filings. It also reduces the probability of the retaining ring twisting, thereby reducing the probability of the retaining ring being damaged and reducing safety hazards during retaining ring installation. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the snap ring assembly tool provided in the embodiments of this application.
[0017] Figure 2 yes Figure 1 The diagram shows an exploded view of the snap ring assembly tool.
[0018] Figure 3 yes Figure 1 The diagram shows a three-dimensional structure of the protrusion in the snap ring assembly tool.
[0019] Figure 4 This is a three-dimensional structural schematic diagram of a retaining ring assembly tool provided in another embodiment of this application.
[0020] Figure 5 This is a three-dimensional structural diagram of the snap ring assembly tool provided in the embodiments of this application, and its cooperation with applicable snap rings, drive shafts, and bearings.
[0021] Figure 6 yes Figure 5 The diagram shows an exploded view of the snap ring assembly tool and the applicable snap rings, drive shafts, and bearings.
[0022] Explanation of main component symbols
[0023] The components include: a retaining ring assembly tool 100, a support member 10, a first end 11, a second end 12, a mounting groove 13, a limiting protrusion 131, an insertion part 14, a supporting protrusion 15, a protrusion 20, a first support surface 21, an inclined part 211, an arc-shaped part 212, a second support surface 22, a first guide surface 23, a second guide surface 24, a rounded corner part 25, a receiving groove 26, an abutment part 27, a limiting groove 271, a guide hole 28, an elastic element 30, a connecting element 40, a guide block 50, a retaining ring 200, an inner hole 210, an opening 220, a drive shaft 300, a retaining ring groove 310, a insertion hole 320, a chamfered structure 330, a bearing 400, and an axis L. Detailed Implementation
[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0025] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.
[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.
[0028] Please see Figure 1 , Figure 5 and Figure 6 This application provides a snap ring assembly tool 100, which includes a spreading member 10 and a protrusion 20.
[0029] The expansion member 10 is columnar or cylindrical. The expansion member 10 has a first end 11 and a second end 12 that are arranged opposite to each other. The diameter of the first end 11 gradually increases along the direction of the second end 12 toward the first end 11. The first end 11 is used to expand the retaining ring 200.
[0030] The protrusion 20 is disposed on the periphery of the first end 11 and protrudes from the side of the first end 11 away from the second end 12 along the extension direction of the spreader 10. The two sides of the portion of the protrusion 20 near the first end 11 have a first support surface 21 and a second support surface 22 symmetrically arranged along the width direction of the protrusion 20. The distance between the first support surface 21 and the second support surface 22 gradually decreases along the direction from the second end 12 toward the first end 11, thereby making the width of the portion of the protrusion 20 near the first end 11 gradually decrease along the direction from the second end 12 toward the first end 11.
[0031] In this embodiment, the retaining ring assembly tool 100 is used to assemble the retaining ring 200 into the retaining ring groove 310 of the transmission shaft 300, so as to restrict the bearing 400 sleeved on the transmission shaft 300 from moving axially along the transmission shaft 300.
[0032] When assembling the retaining ring 200 using the retaining ring assembly tool 100, firstly, the retaining ring 200 is fitted onto the second end 12, and the first end 11 is brought into contact with the drive shaft 300. Then, a press (not shown) is used to push the retaining ring 200 toward the first end 11. Since the diameter of the first end 11 gradually increases along the direction from the second end 12 toward the first end 11, the retaining ring 200 will be pushed open by the first end 11 when it moves to the first end 11, until the diameter of the inner hole 210 of the retaining ring 200 is greater than the outer diameter of the drive shaft 300. After that, the press continues to push the retaining ring 200 onto the drive shaft 300. The inner walls on both sides of the opening 220 of the retaining ring 200 abut against the first support surface 21 and the second support surface 22, respectively. Next, since the distance between the first support surface 21 and the second support surface 22 gradually decreases along the direction from the second end 12 toward the first end 11, the first support surface 21 and the second support surface 22 support the retaining ring 200 when it contracts, so that the retaining ring 200 is in a constrained state when it contracts. Under the support of the first support surface 21 and the second support surface 22, the retaining ring 200 slowly contracts into the retaining ring groove 310, avoiding violent impact between the retaining ring 200 and the bottom of the retaining ring groove 310 to generate flying flaky iron filings, and reducing the probability of the retaining ring 200 twisting, thereby reducing the probability of the retaining ring 200 being damaged and reducing the safety hazards when installing the retaining ring 200.
[0033] In other embodiments, the snap ring assembly tool 100 can also assemble the snap ring 200 onto other shafts (not shown) to limit the movement of gears (not shown), sleeves (not shown), and other workpieces sleeved on the shafts. This application embodiment does not specifically limit this.
[0034] Please refer to the following: Figure 2 In this embodiment, both the first support surface 21 and the second support surface 22 include an inclined portion 211 and an arc-shaped portion 212 connected to the inclined portion 211. The arc-shaped portion 212 is located on the side of the inclined portion 211 away from the second end 12.
[0035] Due to the limited size of the protrusion 20, the lengths of the first support surface 21 and the second support surface 22 cannot be designed to be very long. By setting both the first support surface 21 and the second support surface 22 to include an inclined portion 211 and an arc-shaped portion 212, the slope of the inclined portion 211 can be made gentler, the slope of the arc-shaped portion 212 near the inclined portion 211 can be larger, and the slope of the arc-shaped portion 212 away from the inclined portion 211 can be very gentle, all while keeping the protrusion 200 relatively small. When the retaining ring 200 moves to the inclined portion 211, it can slowly retract. When the retaining ring 200 moves to the arc-shaped portion 212, it can quickly move to the part of the arc-shaped portion 212 away from the inclined portion 211, and retract at a slower speed under the support of the part of the arc-shaped portion 212 away from the inclined portion 211. This helps to reduce the probability of the retaining ring 200 being damaged and reduces the safety hazards when installing the retaining ring 200.
[0036] In some other embodiments, the first support surface 21 and the second support surface 22 may also be configured as inclined surfaces, and this application embodiment does not specifically limit this.
[0037] In this embodiment, the protrusion 20 extends toward the second end 12 along the extension direction of the support member 10. The portion of the protrusion 20 near the second end 12 has a first guide surface 23 and a second guide surface 24 symmetrically arranged along the width direction of the protrusion 20. The distance between the first guide surface 23 and the second guide surface 24 gradually increases along the direction from the second end 12 toward the first end 11, thereby making the width of the portion of the protrusion 20 near the second end 12 gradually increase along the direction from the second end 12 toward the first end 11.
[0038] Specifically, when the retaining ring 200 moves from the second end 12 to the first end 11, the first guide surface 23 and the second guide surface 24 abut against the inner walls on both sides of the opening 220 to guide the retaining ring 200, thereby facilitating the retaining ring 200 to accurately abut against the first support surface 21 and the second support surface 22 after it is fully opened by the first end 11.
[0039] In this embodiment, the first support surface 21 and the first guide surface 23 are located on the same side of the protrusion 20 and are connected to each other, and the second support surface 22 and the second guide surface 24 are located on the same side of the protrusion 20 and are connected to each other. This effectively avoids the situation where the retaining ring 200 cannot abut against the first support surface 21 and the second support surface 22 due to rotation when it moves towards them, thereby further improving the accuracy of the retaining ring 200 abutting against the first support surface 21 and the second support surface 22 after it is fully opened by the first end 11.
[0040] In this embodiment, the maximum distance between the first support surface 21 and the second support surface 22 is greater than or equal to the maximum width of the opening 220 of the retaining ring 200 being opened by the first end 11, and the maximum distance between the first guide surface 23 and the second guide surface 24 is less than or equal to the maximum width of the opening 220 of the retaining ring 200 being opened by the first end 11.
[0041] Thus, when the retaining ring 200 moves to a position corresponding to the middle section of the first guide surface 23 and the second guide surface 24, since the maximum distance between the first guide surface 23 and the second guide surface 24 is less than or equal to the maximum width of the opening 220 of the retaining ring 200 being opened by the first end 11, the retaining ring 200 is opened by the first end 11 and the opening 220 does not contact or only slightly contacts the first guide surface 23 and the second guide surface 24. This helps to reduce the probability of wear between the retaining ring 200 and the first guide surface 23 and the second guide surface 24, and makes the retaining ring 200 completely opened by the internal support force of the first end 11. Since the contact area between the inner hole 210 of the retaining ring 200 and the peripheral sidewall of the first end 11 is large, this helps to reduce the probability of twisting when the retaining ring 200 is opened. When the retaining ring 200 moves to the position corresponding to the first support surface 21 and the second support surface 22, since the maximum distance between the first support surface 21 and the second support surface 22 is greater than or equal to the maximum width of the opening 220 of the retaining ring 200 being opened by the first end 11, the retaining ring 200 loses the internal support force of the first end 11 and is supported by the first support surface 21 and the second support surface 22, thereby facilitating the slow contraction of the retaining ring 200 under the support of the first support surface 21 and the second support surface 22.
[0042] Please see Figure 4 In some other embodiments, the snap ring assembly tool 100 further includes a guide block 50, which is disposed on the periphery of the support member 10 and located on the side of the protrusion 20 away from the first end 11. The guide block 50 has a first guide surface 23 and a second guide surface 24 symmetrically arranged along the width direction of the guide block 50. The distance between the first guide surface 23 and the second guide surface 24 gradually increases along the direction from the second end 12 toward the first end 11.
[0043] Since the middle sections of the first guide surface 23 and the second guide surface 24 do not contact or only slightly contact the retaining ring 200, the guide block 50 and the protrusion 20 can be configured as separate structures, eliminating the middle region of the guide block 50, and placing the first guide surface 23 and the second guide surface 24 on the guide block 50. This application embodiment does not specifically limit this aspect.
[0044] Please refer to the reference again. Figure 1 and Figure 2In this embodiment, the first support surface 21 and the side of the protrusion 20 facing away from the support member 10, as well as the second support surface 22 and the side of the protrusion 20 facing away from the support member 10, both have rounded corners 25.
[0045] Since the inner walls of the retaining ring 200 at the opening 220 are both beveled, the rounded corners 25 allow for point-to-surface contact between the rounded corners 25 and the inner walls of the opening 220, reducing scratching of the contact surfaces and thus lowering the probability of damaging the retaining ring assembly tool 100 and the retaining ring 200. Furthermore, the rounded corners 25 facilitate the retraction of the retaining ring 200 and allow the expansion member 10 to be removed from the retaining ring 200 after assembly.
[0046] In this embodiment, both the first guide surface 23 and the side of the protrusion 20 facing away from the support member 10, and the second guide surface 24 and the side of the protrusion 20 facing away from the support member 10, have rounded corners 25. Thus, when the first guide surface 23 and the second guide surface 24 guide the retaining ring 200, the rounded corners 25 reduce scratching between the first guide surface 23 and the second guide surface 24 and the retaining ring 200, thereby reducing the likelihood of damaging the retaining ring assembly tool 100 and the retaining ring 200.
[0047] In this embodiment, both the first support surface 21 and the second support surface 22 can be sloping surfaces, that is, the included angle between the first support surface 21 and the side of the protrusion 20 away from the support member 10 and the included angle between the second support surface 22 and the side of the protrusion 20 away from the support member 10 are both obtuse angles, so that the first support surface 21 and the second support surface 22 can be adapted to the slope of the inner wall of the opening 220 of the retaining ring 200.
[0048] In this embodiment, both the first guide surface 23 and the second guide surface 24 can be sloped surfaces, that is, the included angle between the first guide surface 23 and the side of the protrusion 20 away from the support member 10 and the included angle between the second guide surface 24 and the side of the protrusion 20 away from the support member 10 are both obtuse angles, so that the first guide surface 23 and the second guide surface 24 can be adapted to the slope of the inner wall of the opening 220 of the retaining ring 200.
[0049] In this embodiment, a mounting groove 13 is provided on the periphery of the first end 11, and the protrusion 20 is slidably disposed in the mounting groove 13 along the extending direction of the supporting member 10 and protrudes from the periphery of the first end 11. The snap ring assembly tool 100 also includes an elastic member 30, which can be a spring. The elastic member 30 is disposed in the mounting groove 13, and both ends of the elastic member 30 are respectively connected to the groove wall of the mounting groove 13 near the second end 12 and the protrusion 20.
[0050] Specifically, to facilitate accurate assembly of the retaining ring 200 into the retaining ring groove 310, when installing the retaining ring 200 using the retaining ring assembly tool 100, the protrusion 20 should extend just close to the retaining ring groove 310. By sliding the protrusion 20 in the mounting groove 13 and providing elastic support for the protrusion 20 with the elastic element 30, when the retaining ring 200 slides to the end of the first support surface 21 and the second support surface 22, the force generated by the retraction of the retaining ring 200 is transmitted to the protrusion 20 through the first support surface 21 and the second support surface 22, thereby causing the protrusion 20 to move towards the second end 12. At this time, the elastic element 30 elastically supports the protrusion 20, causing the protrusion 20 to slowly be pulled out from the opening 220 of the retaining ring 200, and the retaining ring 200 slowly retracts into the retaining ring groove 310. Thus, by sliding the protrusion 20 in the mounting groove 13 and providing elastic support for the protrusion 20 with the elastic element 30, it is easy for the snap ring assembly tool 100 to disengage from the snap ring 200, and it is beneficial to improve the accuracy of installing the snap ring 200.
[0051] In this embodiment, the sliding range of the protrusion 20 is greater than or equal to the thickness of the retaining ring 200. Thus, when the retaining ring 200 is installed using the retaining ring assembly tool 100, the protrusion 20 can extend above the retaining ring groove 310. When the protrusion 20 retracts under the retraction force of the retaining ring 200, the protrusion 20 retracts precisely to the front of the retaining ring groove 310. Therefore, after the retaining ring 200 separates from the protrusion 20, it is directly aligned with the retaining ring groove 310, thereby improving the accuracy of the retaining ring 200 installation.
[0052] In other embodiments, the protrusion 20 may also be connected to the support member 10 by welding, screwing, bonding or other means. This application does not specifically limit this.
[0053] In this embodiment, the mounting groove 13 is connected to the side of the first end 11 away from the second end 12. A limiting protrusion 131 is provided on the bottom of the mounting groove 13. The limiting protrusion 131 is located on the side of the elastic member 30 away from the second end 12. The limiting protrusion 131 is used to stop the protrusion 20 to limit the distance that the elastic member 30 drives the protrusion 20 to move. In this way, by setting the limiting protrusion 131 to stop the protrusion 20, the protrusion 20 can be restricted from coming out of the mounting groove 13 along the extension direction of the spreading member 10. It can also be used to limit the movement of the clasp 200 pressing the protrusion 20 away from the second end 12 when the clasp assembly tool 100 assembles the clasp 200, thereby improving the accuracy of assembling the clasp 200.
[0054] Please refer to the following: Figure 3In this embodiment, the protrusion 20 has a receiving groove 26 extending along the extending direction of the supporting member 10 on the side facing the bottom of the mounting groove 13. The portion of the receiving groove 26 near the first end 11 protrudes from the abutment portion 27. The side of the abutment portion 27 away from the second end 12 abuts against the limiting protrusion 131. The two ends of the elastic member 30 abut against the groove wall of the mounting groove 13 near the second end 12 and the side wall of the abutment portion 27 near the second end 12, respectively. This improves the ease of installing the protrusion 20 and the elastic member 30, and also improves the accuracy of the protrusion 20 sliding in the mounting groove 13.
[0055] In this embodiment, a limiting groove 271 is formed on the side wall of the abutment portion 27 near the second end 12. The two ends of the elastic member 30 abut against the groove wall of the mounting groove 13 near the second end 12 and the bottom of the limiting groove 271, respectively. In this way, the limiting groove 271 can restrict the lateral movement of the elastic member 30 during extension and retraction, thereby improving the accuracy of the elastic member 30 driving the protrusion 20 to move.
[0056] In this embodiment, the protrusion 20 is provided with a guide hole 28. The snap ring assembly tool 100 also includes a connector 40, which passes through the guide hole 28 and is connected to the support member 10. Along the extending direction of the support member 10, the width of the cross-section of the guide hole 28 is greater than the width of the cross-section of the connector 40.
[0057] Specifically, the guide hole 28 can be an oblong hole, and the connector 40 can be a pin. The connector 40 and the guide hole 28 cooperate to prevent the protrusion 20 from dislodging from the opening of the mounting groove 13. In addition, when the protrusion 20 slides in the mounting groove 13, the connector 40 and the guide hole 28 cooperate to limit the sliding direction and sliding distance of the protrusion 20, thereby improving the accuracy of the protrusion 20 in supporting the retaining ring 200 when the retaining ring 200 retracts.
[0058] Please refer to the reference again. Figure 6 In this embodiment, the first end 11 has an insertion part 14 protruding from the side opposite to the second end 12, which is coaxial with the supporting member 10. Specifically, the supporting member 10 and the insertion part 14 have a common axis L. The drive shaft 300 has an insertion hole 320 at one end where the retaining ring groove 310 is opened. When the retaining ring 200 is assembled into the retaining ring groove 310 using the retaining ring assembly tool 100, the insertion part 14 is inserted into the insertion hole 320 for positioning, so as to avoid the supporting member 10 from being offset from the drive shaft 300, thereby improving the accuracy of the retaining ring assembly tool 100 in assembling the retaining ring 200.
[0059] In this embodiment, a support flange 15 is provided on the side of the first end 11 away from the second end 12, and the peripheral sidewall of the support flange 15 is connected to the peripheral sidewall of the first end 11.
[0060] Specifically, the drive shaft 300 has a chamfered structure 330 at one end where the retaining ring groove 310 is located. By providing a supporting flange 15, when the expanding member 10 abuts against the drive shaft 300, the supporting flange 15 can accommodate the chamfered structure 330, preventing the retaining ring 200 from shrinking at the chamfered structure 330 and causing installation failure. Furthermore, the supporting flange 15 can extend the length of the portion of the first end 11 used to expand the retaining ring 200, thereby allowing the retaining ring 200 to be stably supported on the first support surface 21 and the second support surface 22, thus improving the stability of the retaining ring assembly tool 100 when installing the retaining ring 200.
[0061] In this embodiment, the support protrusion 15 is generally annular and extends along the extension direction of the spreader 10.
[0062] In this embodiment, the bearing 400 can be installed on the drive shaft 300 without being pressed into place initially. For example, a gap of 0.1mm-0.3mm can be reserved. When the retaining ring 200 is installed using the retaining ring assembly tool 100, the bearing 400 can support the retaining ring 200, so that both sides of the retaining ring 200 are under stress constraint, thereby further reducing the probability of the retaining ring 200 twisting.
[0063] In summary, the snap ring assembly tool 100 of this application embodiment features a first end 11 of the spreading member 10 with a diameter that gradually increases away from the second end 12, and a protrusion 20 with a first support surface 21 and a second support surface 22 is provided on the periphery of the first end 11 of the spreading member 10. When the snap ring 200 is assembled using the snap ring assembly tool 100, the snap ring 200 is spread open by the first end 11 when it moves to the first end 11. Before retracting, the snap ring 200 is supported by the first support surface 21 and the second support surface 22. The first support surface 21 and the second support surface 22 support the snap ring 200 when it retracts, thereby keeping the snap ring 200 in a constrained state during retraction. This prevents the snap ring 200 from violently colliding with the bottom of the snap ring groove 310 and generating flying flaky iron filings, and reduces the probability of the snap ring 200 twisting. This, in turn, reduces the probability of the snap ring 200 being damaged and reduces safety hazards when installing the snap ring 200.
[0064] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application 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 application without departing from the spirit and scope of the technical solutions of this application.
Claims
1. A clasp assembly tool, characterized in that, include: The expander has a first end and a second end that are disposed opposite to each other. The diameter of the first end gradually increases along the direction from the second end toward the first end. The first end is used to expand the retaining ring. A protrusion is provided on the periphery of the first end and protrudes from the side of the first end away from the second end along the extension direction of the spreading member. The two sides of the portion of the protrusion near the first end have a first support surface and a second support surface symmetrically arranged along the width direction of the protrusion. The distance between the first support surface and the second support surface gradually decreases along the direction from the second end toward the first end.
2. The snap ring assembly tool as described in claim 1, characterized in that, Both the first support surface and the second support surface include an inclined portion and an arcuate portion connected to the inclined portion, the arcuate portion being located on the side of the inclined portion away from the second end.
3. The snap ring assembly tool as described in claim 1 or 2, characterized in that, The protrusion extends toward the second end along the extension direction of the support member. The portion of the protrusion near the second end has a first guide surface and a second guide surface symmetrically arranged along the width direction of the protrusion. The distance between the first guide surface and the second guide surface gradually increases along the direction from the second end toward the first end.
4. The snap ring assembly tool as described in claim 3, characterized in that, The maximum distance between the first support surface and the second support surface is greater than or equal to the maximum width of the opening of the retaining ring when it is opened by the first end, and the maximum distance between the first guide surface and the second guide surface is less than or equal to the maximum width of the opening of the retaining ring when it is opened by the first end.
5. The snap ring assembly tool as described in claim 1 or 2, characterized in that, The snap ring assembly tool further includes a guide block, which is disposed on the periphery of the support member and located on the side of the protrusion away from the first end. The guide block has a first guide surface and a second guide surface symmetrically arranged along the width direction of the guide block on both sides. The distance between the first guide surface and the second guide surface gradually increases along the direction from the second end toward the first end.
6. The snap ring assembly tool as described in claim 1 or 2, characterized in that, The first support surface and the side of the protrusion facing away from the support member, as well as the second support surface and the side of the protrusion facing away from the support member, both have rounded corners.
7. The snap ring assembly tool as described in claim 1 or 2, characterized in that, The first end has an insertion part that protrudes from the side opposite to the second end and is coaxial with the spreading member.
8. The snap ring assembly tool as described in claim 1 or 2, characterized in that, The first end has a supporting flange protruding on the side opposite to the second end, and the peripheral sidewall of the supporting flange is connected to the peripheral sidewall of the first end.
9. The snap ring assembly tool as described in claim 1 or 2, characterized in that, The first end has a mounting groove on its periphery. The protrusion is slidably disposed in the mounting groove along the extension direction of the supporting member and protrudes from the periphery of the first end. The snap ring assembly tool also includes an elastic member, which is disposed in the mounting groove, and the two ends of the elastic member are respectively connected to the groove wall of the mounting groove near the second end and the protrusion.
10. The snap ring assembly tool as described in claim 9, characterized in that, The protrusion has a guide hole, and the snap ring assembly tool also includes a connector. The connector passes through the guide hole and is connected to the support member. Along the extension direction of the support member, the width of the cross-section of the guide hole is greater than the width of the cross-section of the connector.