Elastic clip press-in device

Abstract

The utility model discloses a spring press in device, include: press in unit, it includes eight petal upper pressure head and the upper pressure plate of fixed connection at its top, the upper pressure plate is fixed in the output end of press and can move down with press, the inner chamber of eight petal upper pressure head has the circular spring through screw fixing, support unit, it includes the press -mounting base of setting in eight petal upper pressure head bottom, the top of press -mounting base central place fixedly connected with positioning sleeve, the inner chamber sliding insertion of positioning sleeve has the spring guide column, the upper end of spring guide column is the taper surface of fitting eight petal upper pressure head. The utility model discloses through eight petal upper pressure head and spring guide column upper end taper surface's cooperation, and the elastic support of circular spring, need not to rely on the operating hole of spring and can open and press into the axial end of press -mounting part even with C -shaped spring, breaks through the limitation that traditional spring tongs cannot operate because of no force hole, and reduces the deformation risk of thin spring.

Description

Technical Field

[0001] This utility model relates to the technical field of snap ring pressing devices, and in particular to an elastic snap ring pressing device. Background Technology

[0002] A spring retainer is a fastener used for axial positioning in mechanical assembly. It fixes the position of components through elastic deformation and prevents axial movement. Its technical name is spring retainer ring. It is a standardized part in mechanical design. Common spring retainers include shaft retainers (external retainers) and hole retainers (internal retainers), as well as E-type, C-type, and other variants. The inner diameter of the shaft retainer is slightly smaller than the shaft diameter, and it needs to be expanded with retainer pliers before being installed into the shaft groove. It is suitable for scenarios with no axial load or small load.

[0003] During the production process, there are annular grooves on the external bosses of the assembled parts. It is necessary to put the elastic retaining spring into the annular groove. In the prior art, the elastic retaining spring is usually opened by manually operating retaining spring pliers and then inserted into the annular groove. However, some elastic retaining springs do not have operating holes, and ordinary retaining spring pliers cannot exert force to operate them. The retaining spring cannot be inserted into the annular groove. Moreover, the elastic retaining spring is thin and easily deformed. When using retaining spring pliers manually, the parts are very easy to be scratched. Therefore, an elastic retaining spring pressing device is proposed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned elastic snap ring pressing device, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an elastic retaining spring pressing device, which is suitable for solving the problems that some elastic retaining springs do not have operating holes, ordinary retaining spring pliers cannot exert force to operate them, the retaining springs cannot be inserted into the annular groove, and the elastic retaining springs are thin and easily deformed, and the parts are very easy to be scratched when using retaining spring pliers manually.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an elastic retaining spring pressing device, comprising:

[0008] The pressing unit includes an eight-petaled upper pressing head and an upper pressing plate fixedly connected to its top. The upper pressing plate is fixed to the output end of the press and can move downward with the press. A circular spring is fixed to the inner cavity of the eight-petaled upper pressing head by screws.

[0009] The support unit includes a press-fit base disposed at the bottom of the eight-petal upper press head. A positioning sleeve is fixedly connected to the center of the top of the press-fit base. A snap ring guide post is slidably inserted into the inner cavity of the positioning sleeve. The upper end of the snap ring guide post is a conical surface that fits the eight-petal upper press head.

[0010] The outer periphery of the positioning sleeve is slidably fitted with a press-fitting part, and the axial end of the press-fitting part is pressed into a C-shaped retaining spring by an eight-lobed upper press head.

[0011] In a preferred embodiment of the elastic snap ring pressing device of this utility model, the diameter of the eight upper pressing heads increases sequentially from top to bottom, and the maximum diameter of the eight upper pressing heads is not less than the maximum diameter of the snap ring guide post.

[0012] As a preferred embodiment of the elastic snap ring pressing device of this utility model, the pressing entrance at the bottom of the eight upper pressing heads is provided with a smooth transition chamfer, which is used to smoothly open the C-shaped snap ring on the conical surface of the snap ring guide post.

[0013] As a preferred embodiment of the elastic snap ring pressing device of this utility model, a vertically downward cylindrical surface is provided below the conical section of the snap ring guide post, and the cylindrical surface is used to provide smooth guidance after the C-shaped snap ring disengages from the conical surface.

[0014] In a preferred embodiment of the elastic snap ring pressing device of this utility model, the inner cavity of the positioning sleeve is cuboid, and the end of the snap ring guide post inserted into the inner cavity of the positioning sleeve is a matching cuboid to prevent the snap ring guide post from rotating.

[0015] In a preferred embodiment of the elastic snap ring pressing device of this utility model, a positioning pin is fixedly connected to the top of the pressing base, and a positioning hole that matches the positioning pin is opened on the top of the pressing part. After the positioning pin is inserted into the positioning hole, it restricts the circumferential deflection of the pressing part.

[0016] As a preferred embodiment of the elastic snap ring pressing device of this utility model, the pressing base has arc-shaped grooves on both sides, the edge of the pressing part extends to the top of the arc-shaped groove, and the arc-shaped groove provides hand operating space for removing the pressing part after pressing is completed.

[0017] As a preferred embodiment of the elastic snap ring pressing device of this utility model, the top of the pressing base is fixedly connected to two inverted U-shaped handles, and the connection between the U-shaped handles and the pressing base is reinforced by welding.

[0018] The beneficial effects of this utility model are as follows: by cooperating with the upper conical surface of the eight-lobed upper pressure head and the upper end of the circlip guide post, and with the elastic support of the circular spring, the C-shaped circlip can be evenly spread and pressed into the axial end of the press-fitting part without relying on the operating hole of the circlip. This breaks through the limitation of traditional circlip pliers that cannot be operated due to the lack of a force hole, and reduces the risk of deformation of thin circlips. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall structure of the elastic snap ring pressing device proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the connection structure between the eight-lobed upper pressure head and the circular spring proposed in this utility model;

[0022] Figure 3 This is a schematic diagram showing the disassembled circlip guide post, press-fit parts, and C-shaped spring proposed in this utility model. Attached image description:

[0024] 100. Press-in unit; 101. Eight-lobed upper press head; 102. Upper pressure plate; 103. Circular spring;

[0025] 200. Support unit; 201. Press-fit base; 202. Positioning sleeve; 203. Snap ring guide post; 204. Cylindrical surface; 205. Positioning pin; 206. Arc groove; 207. U-shaped handle;

[0026] 300. Press-fit parts; 301. C-shaped retaining ring; 302. Positioning hole. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0030] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0031] Example 1

[0032] Reference Figures 1-3 The first embodiment of this utility model provides an elastic snap ring pressing device that can evenly spread and press a C-shaped snap ring into the axial end of the press-fit part without relying on the snap ring's operating hole, and reduces the risk of deformation of thin snap rings. It includes: a pressing unit 100 and a support unit 200.

[0033] The pressing unit 100 includes an eight-petal upper pressing head 101 and an upper pressing plate 102 fixedly connected to its top. The upper pressing plate 102 is fixed to the output end of the press and can move downward with the press. A circular spring 103 is fixed to the inner cavity of the eight-petal upper pressing head 101 by screws.

[0034] The support unit 200 includes a press-fit base 201 disposed at the bottom of the eight-petal press head 101. A positioning sleeve 202 is fixedly connected to the center of the top of the press-fit base 201. A snap ring guide post 203 is slidably inserted into the inner cavity of the positioning sleeve 202. The upper end of the snap ring guide post 203 is a conical surface that fits the eight-petal press head 101.

[0035] In addition, a press-fitting part 300 is slidably sleeved on the outer periphery of the positioning sleeve 202. The axial end of the press-fitting part 300 has a groove and a C-shaped retaining spring 301 is pressed in by an eight-lobed upper press head 101.

[0036] The pressing base 201 is fixed on the worktable, and the upper pressing plate 102 of the pressing unit 100 is fixed to the output end of the press. The eight-lobed upper pressing head 101 can move up and down with the press. During the pressing operation, the pressing part 300 is slidably sleeved on the positioning sleeve 202, and the pressing part 300 is supported by the pressing base 201 to ensure that its axial end is facing upward. Then, the snap ring guide post 203 is inserted into the inner cavity of the positioning sleeve 202, so that the conical surface of the upper end of the snap ring guide post 203 is directly facing the axial end of the pressing part 300. Then, the C-shaped snap ring 301 is placed horizontally on the conical surface of the snap ring guide post 203 to ensure that it is directly above the axial end of the pressing part 300.

[0037] Then start the press. The eight-petal upper press head 101 moves downward with the upper press plate 102. The circular spring 103 first contacts the conical surface of the snap ring guide post 203. The elastic support force prevents the two from rigidly colliding. When pressing down continuously, the bottom of the eight-petal upper press head 101 gradually opens with the conical surface of the guide post, and at the same time evenly spreads the C-shaped snap ring 301. The spread C-shaped snap ring 301 slides down along the snap ring guide post 203 and finally accurately presses into the axial end of the press-fit part 300 to complete the assembly. After the press-fit is completed, the eight-petal upper press head 101 rises with the upper press plate 102 and returns to the closed state under the action of the restoring force of the circular spring 103. Then pull out the snap ring guide post 203, and the assembled press-fit part 300 can be taken out from the positioning sleeve 202.

[0038] Example 2

[0039] Reference Figure 1 and Figure 2 This is the second embodiment of the present invention. Unlike the previous embodiment, the diameter of the eight-lobed upper pressure head 101 increases sequentially from top to bottom, and the maximum diameter of the eight-lobed upper pressure head 101 is not less than the maximum diameter of the snap ring guide post 203.

[0040] The eight-lobed upper pressure head 101 adopts a structure that is narrow at the top and wide at the bottom, ensuring that when the eight-lobed upper pressure head 101 moves downward, its inner wall can gradually form a guiding relationship with the conical surface of the snap ring guide post 203. As the downward stroke increases, the flared size of the eight-lobed upper pressure head 101 can cover the maximum outer diameter of the snap ring guide post 203, providing sufficient and stable opening space for the C-shaped snap ring 301.

[0041] It should be noted that the inlet at the bottom of the eight-petal pressure head 101 is provided with a rounded chamfer to smoothly open the C-shaped circlip 301 on the conical surface of the circlip guide post 203.

[0042] When the eight-petal upper pressure head 101 moves down along the conical surface of the circlip guide post 203, the chamfer can change the contact mode between the upper pressure head and the C-shaped circlip 301 to arc surface contact, so as to reduce the stress concentration at the edge of the C-shaped circlip 301 and avoid the C-shaped circlip 301 from plastic deformation or scratches due to excessive local stress. At the same time, the smooth transition of the chamfer can guide the C-shaped circlip 301 to unfold smoothly along the conical surface, ensuring that the unfolding process is uniform and stable, and further improving the pressing accuracy.

[0043] Example 3

[0044] Reference Figure 1 and Figure 3 This is the third embodiment of the present invention. Unlike the previous embodiment, a vertically downward cylindrical surface 204 is provided below the conical section of the snap ring guide post 203. The cylindrical surface 204 is used to provide smooth guidance after the C-shaped snap ring 301 is disengaged from the conical surface.

[0045] The cylindrical surface 204 provides stable guiding support after the C-shaped retaining ring 301 is separated from the conical surface. When the C-shaped retaining ring 301 is spread open along the conical surface by the eight-petal upper pressure head 101 and slides down to the end of the conical surface, the cylindrical surface 204 supports the C-shaped retaining ring 301 and constrains the radial position of the retaining ring through the flat cylindrical surface, so as to prevent it from deviating from the central axis due to elastic return after being separated from the conical surface.

[0046] The inner cavity of the positioning sleeve 202 is cuboid, and the end of the snap ring guide post 203 inserted into the inner cavity of the positioning sleeve 202 is a matching cuboid to prevent the snap ring guide post 203 from rotating.

[0047] The inner cavity of the positioning sleeve 202 is designed as a cuboid, and the end of the snap ring guide post 203 inserted into the positioning sleeve 202 is also a matching cuboid. The two form an anti-rotation structure through their shape matching to ensure the relative positional stability of the snap ring guide post 203 and the eight-lobed upper pressure head 101 during the pressing process, thereby improving the assembly accuracy.

[0048] Example 4

[0049] Reference Figure 1 and Figure 3 This is the fourth embodiment of the present utility model. Unlike the previous embodiment, the top of the press base 201 is fixedly connected with a positioning pin 205, and the top of the press part 300 is provided with a positioning hole 302 that fits the positioning pin 205. After the positioning pin 205 is inserted into the positioning hole 302, it restricts the circumferential deflection of the press part 300.

[0050] When the positioning pin 205 is inserted into the positioning hole 302 of the press-fit part 300, it can directly restrict the circumferential rotation of the press-fit part 300 to ensure that the axial end of the press-fit part 300 is always aligned with the press-fit path of the C-shaped retaining ring 301, and avoid misalignment or scratches of the C-shaped retaining ring 301 due to the deflection of the press-fit part 300.

[0051] The pressing base 201 has arc-shaped grooves 206 on both sides, and the edge of the pressing part 300 extends to the top of the arc-shaped grooves 206. The arc-shaped grooves 206 provide hand operating space for removing the pressing part 300 after pressing is completed.

[0052] The arc-shaped grooves 206 on both sides of the pressing base 201 provide hand operating space below the pressing part 300, which solves the problem that the pressing part 300 is stuck to the pressing base 201 after pressing and is difficult to grasp directly. Operators can easily remove the pressing part 300 from the positioning sleeve 202 by inserting their fingers through the arc-shaped grooves 206.

[0053] In addition, two inverted U-shaped handles 207 are fixedly connected to the top of the press base 201, and the connection between the U-shaped handles 207 and the press base 201 is reinforced by welding.

[0054] Two inverted U-shaped handles 207 are mainly used to support the overall handling of the support unit 200. Operators can easily move the press base 201 and related components by holding the U-shaped handles 207.

[0055] During use, the pressing base 201 is fixed on the workbench, and the upper pressing plate 102 of the pressing unit 100 is fixed to the output end of the press, which drives the eight-lobed upper pressing head 101 to move up and down with the press. Before pressing, the pressing part 300 is slidably sleeved on the positioning sleeve 202 at the top center of the pressing base 201. The pressing base 201 supports the pressing part 300 and makes its axial end face upward. At the same time, the positioning hole 302 at the top of the pressing part 300 cooperates with the positioning pin 205 on the pressing base 201 to restrict the circumferential deflection of the pressing part 300. Then, the snap ring guide post 203 is inserted into the cuboid inner cavity of the positioning sleeve 202, so that its upper conical surface faces the axial end of the pressing part 300. Then, the C-shaped snap ring 301 is placed horizontally on the conical surface of the snap ring guide post 203 to ensure that it is located directly above the axial end of the pressing part 300.

[0056] The press is then started. The eight-lobed upper pressure head 101 moves downward with the upper pressure plate 102. The circular spring 103 inside its cavity first contacts the conical surface of the retaining ring guide post 203. The elastic support force prevents the two from rigidly colliding. As the downward stroke increases, the inner wall of the eight-lobed upper pressure head 101 gradually fits into the conical surface of the retaining ring guide post 203. The eight lobes at the bottom gradually open along the conical surface, simultaneously spreading the C-shaped retaining ring 301 evenly. The spread C-shaped retaining ring 301 moves along the retaining ring guide post 203. The column 203 slides down, passes through the conical section, and is received by the vertical cylindrical surface 204 below, and is finally pressed into the axial end of the press-fit part 300. After the press-fit is completed, the eight-petal upper press head 101 rises with the upper press plate 102. The eight-petal upper press head 101 returns to the closed state under its own restoring force. Then the snap ring guide column 203 is pulled out, and the assembled press-fit part 300 is taken out from the positioning sleeve 202 by using the arc grooves 206 on both sides of the press-fit base 201.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solution 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 solution of this utility model without departing from the spirit and scope of the technical solution 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. A spring clip insertion device, characterized in that, include: The pressing unit (100) includes an eight-petal upper pressing head (101) and an upper pressing plate (102) fixedly connected to its top. The upper pressing plate (102) is fixed to the output end of the press and can move downward with the press. A circular spring (103) is fixed to the inner cavity of the eight-petal upper pressing head (101) by screws. The support unit (200) includes a press-fit base (201) disposed at the bottom of the eight-petal upper press head (101), a positioning sleeve (202) is fixedly connected at the center of the top of the press-fit base (201), a snap ring guide post (203) is slidably inserted into the inner cavity of the positioning sleeve (202), and the upper end of the snap ring guide post (203) is a conical surface that fits the eight-petal upper press head (101); The positioning sleeve (202) is slidably fitted with a press-fitting part (300) on its outer periphery, and the axial end of the press-fitting part (300) is pressed into a C-shaped retaining ring (301) by an eight-lobed upper press head (101).

2. The elastic retaining spring pressing device according to claim 1, characterized in that: The diameter of the eight-lobed pressure head (101) increases sequentially from top to bottom, and the maximum diameter of the eight-lobed pressure head (101) is not less than the maximum diameter of the snap ring guide post (203).

3. The elastic retaining spring pressing device according to claim 2, characterized in that: The bottom inlet of each of the eight-lobed pressure heads (101) is provided with a chamfered edge that is rounded to smoothly open the C-shaped circlip (301) on the conical surface of the circlip guide post (203).

4. The elastic retaining spring pressing device according to claim 3, characterized in that: The guide post (203) has a vertically downward cylindrical surface (204) below its conical section. The cylindrical surface (204) is used to provide smooth guidance after the C-shaped circlip (301) disengages from the conical surface.

5. The elastic retaining spring pressing device according to claim 4, characterized in that: The inner cavity of the positioning sleeve (202) is cuboid, and the end of the snap ring guide post (203) inserted into the inner cavity of the positioning sleeve (202) is a matching cuboid, which is used to prevent the snap ring guide post (203) from rotating.

6. The elastic retaining spring pressing device according to claim 1, characterized in that: The top of the press base (201) is fixedly connected with a positioning pin (205), and the top of the press part (300) is provided with a positioning hole (302) that fits the positioning pin (205). After the positioning pin (205) is inserted into the positioning hole (302), it restricts the circumferential deflection of the press part (300).

7. The elastic retaining spring pressing device according to claim 2, characterized in that: The pressing base (201) has arc-shaped grooves (206) on both sides, and the edge of the pressing part (300) extends to the top of the arc-shaped groove (206). The arc-shaped groove (206) provides hand operating space for removing the pressing part (300) after pressing is completed.

8. The elastic retaining spring pressing device according to claim 7, characterized in that: The top of the press base (201) is fixedly connected to two inverted U-shaped handles (207), and the connection between the U-shaped handles (207) and the press base (201) is reinforced by welding.

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