Bearing snap ring press-fitting tool

Abstract

The invention relates to the field of machinery for press-fit connection, in particular to a bearing snap ring press-fitting tool. The device is used for solving the problems that in the prior art, an operator needs to clamp a clamping ring into a ring groove space through manual operation, installation is labor-consuming, and efficiency is low. The bearing snap ring press-fitting tool comprises a snap ring guide assembly and a snap ring pressing structure, wherein the snap ring guide assembly is arranged on the upper portion of a bearing and the upper portion of a connecting piece and can form a snap ring extrusion channel, and the snap ring pressing structure can press a snap ring into an annular gap space between the bearing and the connecting piece along the snap ring extrusion channel and enter an annular groove space. The diameter of the inner side face of the bottom of the clamping ring extrusion channel is not smaller than the inner diameter of the annular space, and the diameter of the outer side face of the bottom of the clamping ring extrusion channel is not larger than the outer diameter of the annular space. The clamping ring can be extruded by the clamping ring extrusion channel to deform and enter the annular groove space when reaching the bottom of the clamping ring extrusion channel. Therefore, the mounting process of the snap ring is simple and easy to operate, and the mounting efficiency of the snap ring is improved.

Description

Technical Field

[0001] The invention relates to the field of machinery used for press-fit connection, and in particular to a bearing clamping ring press-fitting tool. Background Art

[0002] Accurate and reliable positioning is the key to bearing application. In gearboxes, connectors with threaded holes are often used to position and fix bearings. In order to facilitate installation, the connectors and bearings are often assembled into one before proceeding to subsequent steps. The connector 6 is annular and has an inner ring groove on its inner circumference. The outer ring of the bearing 1 is provided with a groove as shown in the figure. Figure 2 , Figure 3 The step and outer ring groove 8 shown in the figure, the connector 6 is mounted on the outer ring of the bearing 1 and can cooperate with the step of the bearing 1 to achieve axial positioning between the two. At this time, the inner ring groove of the connector 6 is also in the relative position of the outer diameter groove 8 of the bearing. The inner ring groove of the connector 6 and the outer ring groove 8 of the bearing 1 form an annular groove space 12, and the assembly of the connector and the bearing at the upper part of the annular groove space 12 also forms an annular gap space 15. At this time, it is necessary to insert the connector into the annular groove space. Figure 4 or Figure 5 The special-shaped snap ring 7 shown is used to connect and fix the bearing 1 to the connecting member 6. The difference between the maximum diameter D and the minimum diameter d of the special-shaped snap ring 7 is greater than the width of the annular gap space 15 and less than the width of the annular groove space 12. Figure 1 , Figure 2 As shown in the figure, after the snap ring is inserted into the ring groove space, the side of the snap ring (such as Figure 4 As shown in the edge or Figure 5 The protrusion shown in the figure can cooperate with the groove wall of the outer ring groove 8 of the bearing to fix the connecting part and the bearing.

[0003] For this type of assembly structure, manual assembly is generally used. Because the annular gap space is small and the retaining ring is irregular, the staff must first extend one end of the retaining ring through the annular gap space into the annular groove space during manual operation, and then bend the retaining ring by hand to deform the retaining ring profile before the remaining part of the retaining ring can be inserted into the annular groove space through the annular gap space. This installation method is laborious and inefficient. Summary of the invention

[0004] The purpose of the present invention is to provide a bearing retaining ring pressing tool to solve the problem in the prior art that the operator needs to manually insert the retaining ring into the ring groove space formed by the outer ring groove of the bearing and the inner ring groove of the connecting piece, which is laborious and inefficient to install.

[0005] In order to solve the above technical problems, the present invention provides a bearing retaining ring pressing tool, including a retaining ring guide assembly for being placed on the upper part of the bearing and the connecting piece to form a retaining ring extrusion channel, and a retaining ring pressing structure that can press the retaining ring along the retaining ring extrusion channel into the annular gap space between the bearing and the connecting piece and enter the annular groove space. The diameter of the upper inner side surface of the retaining ring extrusion channel is not greater than the inner diameter of the retaining ring, and the diameter of the outer side surface is not less than the outer diameter of the retaining ring. The diameter of the bottom inner side surface of the retaining ring extrusion channel is not less than the inner diameter of the annular gap space, and the diameter of the outer side surface is not greater than the outer diameter of the annular gap space. When the retaining ring reaches the bottom of the retaining ring extrusion channel, it can be squeezed and deformed by the retaining ring extrusion channel and enter the annular groove space through the annular gap space.

[0006] The present invention proposes a new technical solution to solve the problem that the operator needs to manually insert the snap ring into the ring groove space formed by the outer ring groove of the bearing and the inner ring groove of the connector in the prior art, which is laborious and inefficient to install. By setting a snap ring extrusion channel at the upper part of the ring gap space, and the diameter of the upper inner side surface of the snap ring extrusion channel is not greater than the inner diameter of the snap ring, and the diameter of the outer side surface is not less than the outer diameter of the snap ring, and the diameter of the bottom inner side surface of the snap ring extrusion channel is not less than the inner diameter of the ring gap space, and the diameter of the outer side surface is not greater than the outer diameter of the ring gap space, the snap ring can be squeezed and deformed when it reaches the bottom of the snap ring extrusion channel, until the difference between the maximum diameter and the minimum diameter of the snap ring is less than or equal to the width of the ring gap space, at which time, the snap ring can smoothly enter the ring groove space through the ring gap space. By setting the snap ring extrusion channel and using the snap ring pressing structure to press the snap ring down, the snap ring installation process is simple and easy to operate, and the snap ring installation efficiency is improved.

[0007] Furthermore, the cross section of the clamp ring extrusion channel is in an inverted trapezoidal shape.

[0008] Furthermore, the clamping ring guide assembly includes an inner pressure plate and an outer pressure ring, the outer pressure ring is sleeved outside the inner pressure plate, and the outer side surface of the inner pressure plate and the inner side surface of the outer pressure ring together form the clamping ring extrusion channel.

[0009] Furthermore, the lower part of the inner pressure plate has an assembly positioning protrusion that can cooperate with the inner ring of the bearing to coaxially position the inner pressure plate, and the outer periphery of the lower part of the outer pressure ring is provided with an external positioning protrusion that can cooperate with the connecting piece to coaxially position the outer pressure ring.

[0010] Furthermore, the clamping ring pressing structure includes a main body and an annular pressing section extending vertically downward on the lower side of the main body.

[0011] Furthermore, a guide hole is provided in the middle of the inner pressure plate, and a guide protrusion is provided at the lower part of the clamping ring pressing structure so as to cooperate with the guide hole of the inner pressure plate in the up and down directions.

[0012] Furthermore, the retaining ring pressing tool also includes a base, and the base is provided with a bearing positioning support structure that can position and support the bearing.

[0013] Furthermore, the bearing positioning support structure includes a bearing support groove that can support the bearing, and the groove wall of the bearing support groove is used to cooperate with the circumferential surface of the bearing to achieve the positioning of the bearing.

[0014] Furthermore, a connector positioning structure for positioning the connector is also provided on the base.

[0015] Furthermore, the connector positioning structure comprises a connector positioning groove for positioning the connector, and a groove wall of the connector positioning groove is used to cooperate with a circumferential surface of the connector to define a relative position of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure for installing the snap ring into the ring groove space between the bearing and the connecting piece; Figure 2 for Figure 1 A local enlarged schematic diagram of point A; Figure 3 It is a schematic diagram of the structure of the outer ring groove of the bearing; Figure 4 This is a schematic diagram of the structure of the special-shaped clamping ring example 1; Figure 5 It is a structural schematic diagram of the second special-shaped clamping ring example; Figure 6 A schematic diagram of using the bearing snap ring press-fitting tool of the present invention to press-fit a snap ring into the annular groove space between a bearing and a connecting member; Figure 7 It is a structural schematic diagram of a clamping ring pressing structure of a bearing clamping ring pressing tool of the present invention; Figure 8 It is a structural schematic diagram of the outer pressure ring of the bearing clamping ring press-fitting tool of the present invention; Fig. 9 It is a structural schematic diagram of the inner pressure plate of the bearing clamping ring press-fitting tool of the present invention; Fig.10 It is a structural schematic diagram of a base of a bearing snap ring press-fitting tool of the present invention; Fig.11 A schematic diagram of step 1 of a second assembly scheme for using the bearing snap ring press-fitting tool of the present invention to press-fit the snap ring into the annular groove space between the bearing and the connecting member; Fig.12 It is a schematic diagram of step 2 of a second assembly scheme for using the bearing snap ring press-fitting tool of the present invention to press-fit the snap ring into the annular groove space between the bearing and the connecting member.

[0017] In the figure: 1. bearing; 2. retaining ring pressing structure; 21. guide protrusion; 22. annular pressure section; 3. inner pressure plate; 31. assembly positioning protrusion; 4. outer pressure ring; 5. base; 6. connecting piece; 7. retaining ring; 8. outer ring groove; 9. external positioning protrusion; 10. inner side surface; 11. outer side surface; 12. ring groove space; 13. bearing support groove; 14. connecting piece positioning groove; 15. annular gap space. DETAILED DESCRIPTION

[0018] In the prior art, the retaining ring is generally installed into the ring groove space by manual assembly. Since the annular gap space at the top of the ring groove space is small and the retaining ring is irregularly shaped, the staff must first extend one end of the retaining ring into the ring groove space through the annular gap space during manual operation, and then bend the retaining ring by hand to deform the retaining ring profile before the remaining part of the retaining ring can be inserted into the ring groove space through the annular gap space. This installation method is laborious and inefficient.

[0019] The present invention proposes a technical solution to the problems existing in the above technical solutions. The core concept of the present invention is: a clamping ring extrusion channel is set at the upper part of the annular gap space, the diameter of the upper inner side surface of the clamping ring extrusion channel is not greater than the inner diameter of the clamping ring, and the diameter of the outer side surface is not less than the outer diameter of the clamping ring. The diameter of the bottom inner side surface of the clamping ring extrusion channel is not less than the inner diameter of the annular gap space, and the diameter of the outer side surface is not greater than the outer diameter of the annular gap space. When the clamping ring reaches the bottom of the clamping ring extrusion channel, it can be squeezed until the difference between the maximum diameter and the minimum diameter of the clamping ring is less than or equal to the width of the annular gap space. At this time, the clamping ring can smoothly enter the annular groove space through the annular gap space. By setting the clamping ring extrusion channel and using the clamping ring pressing structure to press the clamping ring down, the clamping ring installation process is simple and easy to operate, and the installation efficiency of the clamping ring is improved.

[0020] Based on the above invention concept, a bearing snap ring press tool of the present invention includes a bearing 1 and a connecting member 6 as shown in FIG. Figure 6 The clamp ring guide assembly shown can form a clamp ring extrusion channel, and can be used to form a special-shaped clamp ring 7 (for example Figure 4 The first shaped snap ring shown or Figure 5 The second special-shaped snap ring shown in FIG. 1 is pressed into the annular space 15 between the bearing 1 and the connecting member 6 along the snap ring extrusion channel and enters the annular space 15 between the bearing 1 and the connecting member 6. Figure 2In the snap ring pressing structure 2 of the annular groove space 12 shown, the diameter of the upper inner side surface of the snap ring extrusion channel is not greater than the inner diameter of the snap ring 7, and the diameter of the outer side surface is not less than the outer diameter of the snap ring 7. In this way, the snap ring 7 can be placed in the snap ring extrusion channel without manually pulling the snap ring 7, which is convenient for operation. At the same time, the diameter of the bottom inner side surface of the snap ring extrusion channel is not less than the inner diameter of the annular gap space 15, and the diameter of the outer side surface is not greater than the outer diameter of the annular gap space 15, so that the snap ring 7 can be squeezed and deformed by the snap ring extrusion channel when it reaches the bottom of the snap ring extrusion channel and enter the annular groove space 12 through the annular gap space 15. By setting up the snap ring extrusion channel and using the snap ring pressing structure 2 to press down the snap ring 7, the snap ring installation process is simple and easy to operate, and the snap ring installation efficiency is improved.

[0021] When using, Figure 6 As shown, a snap ring guide assembly is placed on the connecting member 6 and the upper part of the bearing 1. At this time, the snap ring extrusion channel on the snap ring guide assembly is located as shown in FIG. Figure 2 The upper part of the annular groove space 12 formed by the outer ring groove 8 of the bearing and the inner ring groove of the connecting piece 6 is shown. Subsequently, the snap ring 7 is placed in the snap ring extrusion channel, and the snap ring 7 is pressed down by the snap ring pressing structure 2 until the snap ring 7 reaches the bottom of the snap ring extrusion channel. Because the inner side diameter of the bottom of the snap ring extrusion channel is not less than the inner diameter of the annular gap space 15, and the outer side diameter is not greater than the outer diameter of the annular gap space 15, the snap ring 7 is squeezed when it reaches the bottom of the snap ring extrusion channel until the difference between the maximum diameter and the minimum diameter of the snap ring 7 is less than or equal to the width of the annular gap space 15, so that the snap ring 7 can smoothly enter the annular groove space 12 through the annular gap space 15.

[0022] In this embodiment, the cross section of the clamping ring extrusion channel is in an inverted trapezoid. Under the action of the clamping ring pressing structure 2, the clamping ring 7 can move downward along the inverted trapezoidal clamping ring extrusion channel. Because the cross section of the clamping ring extrusion channel is smoothly reduced downward, the clamping ring 7 is also gradually compressed in the smooth inverted trapezoidal clamping ring extrusion channel, which improves the smoothness of the compression process and avoids the clamping ring 7 being pressed down and compressed due to the local sharp reduction of the clamping ring extrusion channel. In addition, in other embodiments, the cross section of the clamping ring extrusion channel can also be set to a funnel shape with a large upper part, a small lower part and arc-shaped on both sides, and it is only necessary to ensure that the clamping ring can smoothly enter the annular groove space through the annular gap space after being extruded through the clamping ring extrusion channel.

[0023] In this embodiment, the snap ring guide assembly includes: Figure 6 The inner pressure plate 3 and the outer pressure ring 4 are shown, and the outer side surface 11 of the inner pressure plate 3 is as shown in FIG. Fig. 9 As shown, it is conical, the upper end diameter of which is not larger than the inscribed circle diameter of the free state snap ring 7, and the lower end diameter is not smaller than the inner diameter of the annular space 15. The inner side surface 10 of the outer pressure ring 4 is as shown in FIG. Figure 8As shown, it is in an inverted cone shape, the diameter of the upper end is not less than the diameter of the circumscribed circle of the retaining ring 7 in the free state, and the diameter of the lower end is not greater than the outer diameter of the annular gap space 15. The outer side surface 11 of the inner pressure plate 3 and the inner side surface 10 of the outer pressure ring 4 together form the retaining ring extrusion channel. In this way, different assembly schemes can be adopted according to different situations as described below, thereby improving the flexibility of installing the retaining ring 7.

[0024] A first assembly scheme of a snap ring pressing tool of the present invention is as follows: an inner pressure plate 3 and an outer pressure ring 4 are placed on a bearing 1 and a connecting piece 6, a snap ring extrusion channel surrounded by an outer side surface 11 of the inner pressure plate and an inner side surface 10 of the outer pressure ring is located at the upper part of the annular gap space 15, a snap ring 7 is placed at the upper part of the snap ring extrusion channel, and a snap ring pressing structure 2 is used to press the snap ring 7 down along the snap ring extrusion channel, and finally the assembly of the snap ring 7, the connecting piece 6 and the bearing 1 is completed.

[0025] When the annular gap between the connector 6 and the bearing 1 is very small, the snap ring pressing structure 2 has a certain thickness and it is difficult to press the snap ring 7 into the annular groove space through the annular gap 15. In this case, the second assembly scheme can be adopted: Fig.11 , Fig.12 As shown, the outer pressure ring 4 is placed on the upper end of the connecting piece 6, the snap ring 7 is placed on the inner side surface 10 of the outer pressure ring, and the snap ring pressing structure 2 is used to push the snap ring 7 into the inner ring groove of the connecting piece 6. The assembly of the snap ring 7 and the connecting piece 6 is completed. Then, the assembly of the snap ring 7 and the connecting piece 6 is taken out, the inner pressure plate 3 is placed on the bearing 1, and the assembly is sleeved on the outer side surface 11 of the inner pressure plate 3. The snap ring pressing structure 2 is used to press down the assembly of the snap ring 7 and the connecting piece 6. Finally, the assembly of the snap ring 7, the connecting piece 6 and the bearing 1 is completed.

[0026] In this embodiment, the lower part of the inner pressure plate 3 has the following Fig. 9 As shown, the assembly positioning protrusion 31 can cooperate with the inner ring of the bearing 1 to coaxially position the inner pressure plate 3, and the outer periphery of the lower part of the outer pressure ring 4 is provided with a Figure 8 The external positioning protrusion 9 shown can cooperate with the connecting piece 6 to coaxially position the outer pressure ring 4. The assembly positioning protrusion 31 at the lower part of the inner pressure plate 3 of this embodiment is cylindrical and can be adapted to the inner ring of the bearing 1, and the external positioning protrusion 9 at the outer periphery of the lower part of the outer pressure ring 4 is in the shape of a convex ring and can be stopped at the outer periphery of the connecting piece 6. It has a simple structure and is easy to manufacture, which avoids the inner pressure plate 3 and the outer pressure ring 4 from slipping during the press-fitting process so that the positions of the two relative to the annular space 15 are offset, making it difficult for the retaining ring 7 to be inserted. In addition, in other embodiments, in order to save materials, positioning columns can be set at corresponding positions of the inner pressure plate 3 and the outer pressure ring 4, and the positioning columns can respectively cooperate and stop with the inner circumference of the inner ring of the bearing 1 and the outer circumference of the connecting piece 6 to achieve the positioning of the inner pressure plate 3 and the outer pressure ring 4.

[0027] In this embodiment, the clamping ring pressing structure 2 includes a main body and a vertically downwardly extending portion of the lower side of the main body. Figure 6 The annular pressure section 22 is shown. Because the clamp ring extrusion channel is in an inverted trapezoidal shape, the clamp ring 7 has a certain resistance downward. When the annular pressure section 22 is used, force can be applied to the entire clamp ring 7, so that the clamp ring 7 is evenly stressed, thereby improving the efficiency of the press-fitting of the clamp ring 7. In addition, in other embodiments, the clamp ring pressing structure can also press the clamp ring down by a pressure rod arranged along the circumference on the lower side of the main body, and it is only necessary to ensure the reliability of the press-fitting process.

[0028] In this embodiment, a guide hole is provided in the middle of the inner pressure plate 3, and the lower part of the clamping ring pressing structure 2 has a guide hole that can cooperate with the guide hole of the inner pressure plate 3 in the upper and lower directions. Figure 7 The guide protrusion 21 shown. The guide protrusion 21 can cooperate with the guide hole of the inner pressure plate 3 and move along the guide hole. In this way, the clamping ring pressing structure 2 can press the clamping ring 7 downward along a fixed path, which improves the stability of the clamping ring 7 pressing process and avoids the uneven displacement of the clamping ring 7 in the clamping ring extrusion channel due to uneven force on both sides of the clamping ring, which affects the entire pressing process.

[0029] In this embodiment, the clamping ring pressing tool also includes: Fig.10 The base 5 shown in the figure has a bearing positioning support structure for positioning and supporting the bearing. The bearing positioning support structure can avoid the problem of difficulty in pressing down the snap ring 7 due to the relative position offset between the bearing 1 and the connecting member 6 caused by the slippage of the bearing 1 when the snap ring 7 is pressed, thereby improving the reliability of the press-fitting.

[0030] In this embodiment, the bearing positioning support structure includes a structure that can support the bearing 1. Fig.10 The bearing support groove 13 shown, the groove wall of the bearing support groove 13 can cooperate with the bearing 1 to achieve the positioning of the bearing 1. In this embodiment, the middle part of the bearing support groove 13 forms a circular ring-shaped protrusion in the base 5. At this time, the inner groove wall of the bearing support groove 13 can cooperate with the inner ring of the bearing 1 to achieve the positioning of the bearing. In addition, in other embodiments, a ring groove with the same size as the outer diameter of the bearing can be set on the base, and the outer diameter of the ring groove is used to position the bearing.

[0031] In this embodiment, the base 5 is also provided with a connector positioning structure that can position the connector 6. When the connector 6 is mounted on the outer ring of the bearing 1, the radial positions of the bearing 1 and the connector 6 cannot be determined, which results in an uncertain position of the ring groove space and makes it difficult to install the snap ring 7. Therefore, a preferred solution is proposed in this embodiment, in which a connector positioning structure is provided on the basis of the bearing positioning support structure to position the radial positions of the bearing 1 and the connector 6, thereby avoiding the problem of difficulty in the snap ring press-fitting process due to the offset position of the bearing 1 in the connector 6.

[0032] In this embodiment, the connector positioning structure includes a connector positioning groove 14 that can position the connector 6, and the groove wall of the connector positioning groove 14 is used to cooperate with the circumferential surface of the connector 6 to limit the relative position of the connector 6. The groove wall of the connector positioning groove 14 cooperates with the circumferential surface of the connector 6, and the structure is simple and easy to manufacture. When in use, the bearing 1 and the connector 6 are placed on the base 5, and the bearing support groove 13 and the connector positioning groove 14 on the base 5 can position the positions of the bearing 1 and the connector 6, and then the snap ring guide assembly is placed on the connector 6 and the base 5 and subsequent operations are performed. In this way, the bearing 1 and the connector 6 are prevented from affecting the press-fitting of the snap ring 7 due to relative slippage, thereby improving the press-fitting efficiency.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A bearing snap ring press tool, characterized in that: It includes a snap ring guide assembly for being placed on the upper part of the bearing and the connecting piece and forming a snap ring extrusion channel, and a snap ring pressing structure which can press the snap ring along the snap ring extrusion channel into the annular gap space between the bearing and the connecting piece and enter the annular groove space. The diameter of the upper inner side surface of the snap ring extrusion channel is not greater than the inner diameter of the snap ring, and the diameter of the outer side surface is not less than the outer diameter of the snap ring. The diameter of the bottom inner side surface of the snap ring extrusion channel is not less than the inner diameter of the annular gap space, and the diameter of the outer side surface is not greater than the outer diameter of the annular gap space. When the snap ring reaches the bottom of the snap ring extrusion channel, it can be squeezed and deformed by the snap ring extrusion channel and enter the annular groove space through the annular gap space.

2. The bearing snap ring press tool according to claim 1, characterized in that: The cross section of the clamp ring extrusion channel is in an inverted trapezoidal shape.

3. The bearing snap ring press tool according to claim 2, characterized in that: The clamping ring guide assembly comprises an inner pressure plate and an outer pressure ring. The outer pressure ring is sleeved outside the inner pressure plate. The outer side surface of the inner pressure plate and the inner side surface of the outer pressure ring together form the clamping ring extrusion channel.

4. The bearing snap ring press-fitting tool according to claim 3, characterized in that: The lower part of the inner pressure plate has an assembly positioning protrusion that can cooperate with the inner ring of the bearing to coaxially position the inner pressure plate, and the outer periphery of the lower part of the outer pressure ring is provided with an external positioning protrusion that can cooperate with the connecting piece to coaxially position the outer pressure ring.

5. The bearing snap ring press tool according to any one of claims 1 to 4, characterized in that: The clamp ring pressing structure comprises a main body and an annular pressing section extending vertically downward on the lower side of the main body.

6. The bearing snap ring press-fitting tool according to claim 3 or 4, characterized in that: A guide hole is arranged in the middle of the inner pressure plate, and a guide protrusion which can cooperate with the guide hole of the inner pressure plate in the up and down directions is arranged at the lower part of the clamp ring pressing structure.

7. The bearing retaining ring press-fitting tool according to any one of claims 1 to 4, characterized in that: The clamping ring pressing tool also includes a base, on which a bearing positioning support structure is provided for positioning and supporting the bearing.

8. The bearing snap ring press-fitting tool according to claim 7, characterized in that: The bearing positioning support structure comprises a bearing support groove which can support the bearing, and the groove wall of the bearing support groove is used to cooperate with the circumferential surface of the bearing to realize the positioning of the bearing.

9. The bearing snap ring press-fitting tool according to claim 7, characterized in that: The base is also provided with a connector positioning structure which can position the connector.

10. The bearing snap ring press-fitting tool according to claim 9, characterized in that: The connector positioning structure comprises a connector positioning groove for positioning the connector, and the groove wall of the connector positioning groove is used to cooperate with the circumferential surface of the connector to define the relative position of the connector.

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