Snap spring with anti-falling structure

Abstract

The utility model discloses a snap spring with an anti-falling structure, which relates to the field of driving shaft connection and comprises a snap spring body, the snap spring body is sleeved in a snap spring groove B of a spline shaft, and during assembly, the spline shaft is matched with a spline housing, so that the snap spring body is clamped in a snap spring groove A of the spline housing; the contact position of the bottom of the clamp spring body and the clamp spring groove B is of a straight-edge-shaped structure. The elastic deformation force of the clamp spring is improved, it is guaranteed that the outer diameter of the clamp spring is reset to the original state after the clamp spring is pressed and assembled, the problem that the outer diameter is reduced is avoided, the axial positions of the spline shaft and the spline sleeve are effectively fixed, and pulling-off is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of driving shaft connection, and particularly relates to a prevent structure clamp spring. BACKGROUND

[0002] As shown in Figure 4 , 5 , in the prior art, spline sleeve and spline shaft parts are matched together, in order to fix the axial relative position of spline sleeve and spline shaft, an anti-dropping clamp spring is needed to fix the axial position. The assembly steps are as follows: firstly, the existing clamp spring (5) is assembled on the clamp spring groove B (21) of the spline shaft (2), then the spline shaft is inserted into the spline sleeve (1), with the insertion, the clamp spring is slowly compressed in the clamp spring groove B of the spline sleeve by the chamfer (12) of the spline sleeve, with the continuous insertion, the clamp spring groove B of the spline shaft is aligned with the clamp spring groove A (11) of the spline sleeve at the same position, at this time, the clamp spring gradually opens, the outer diameter of the clamp spring is inserted into the clamp spring groove A of the spline sleeve, at this time, the clamp spring fixes the axial position of the spline shaft and the spline sleeve, so that the two cannot move axially relative to each other.

[0003] The clamp spring undergoes the process of being compressed to be small and then being opened during assembly, the existing clamp spring and the clamp spring groove B are assembled to present an oval shape with an opening, the entire clamp spring is in contact with the clamp spring groove B at the opening and the contact position (4) at the bottom thereof. As shown in Figure 2 , the existing clamp spring structure designs the bottom of the clamp spring (i.e. the contact position) as a circular arc structure, and the assembly process greatly affects the outer diameter of the clamp spring (the deformation amount of the clamp spring is large), and the outer diameter size is small. After the clamp spring is assembled in place, the outer diameter cannot be reset to the original state size, so that the spline shaft is easily pulled out of the spline sleeve, the axial position cannot be effectively fixed, and the quality problem of frequent pulling out exists, which needs to be improved. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the defects in the prior art, and provides an anti-dropping structure clamp spring, improves the elastic deformation force of the clamp spring, ensures that the outer diameter size of the clamp spring is reset to the original state size after the compression assembly process, does not have the problem of small outer diameter size, effectively fixes the axial position of the spline shaft and the spline sleeve, and prevents pulling out.

[0005] The utility model aims at overcoming the defects in the prior art, and provides an anti-dropping structure clamp spring, improves the elastic deformation force of the clamp spring, ensures that the outer diameter size of the clamp spring is reset to the original state size after the compression assembly process, does not have the problem of small outer diameter size, effectively fixes the axial position of the spline shaft and the spline sleeve, and prevents pulling out.

[0006] As a further technical scheme, the mouth portion of the spline sleeve is provided with a chamfer.

[0007] The utility model discloses the beneficial effects that:

[0008] 1, the contact position of the clamp spring bottom and the clamp spring groove is improved to straight edge structure from the original arc structure, improves the elastic deformation force of the clamp spring, guarantees the outer diameter size reset to the original state size after the clamp spring in the compression assembly process, does not exist the phenomenon that the outer diameter size becomes small, plays effective fixed to the axial position of the spline shaft and spline cover, prevents the pull-off.

[0009] 2, spline cover mouth portion sets up chamfer, when assembling, can gradually compress the clamp spring, and the clamp spring is pressed into the clamp spring groove conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure schematic diagram of the utility model assembly.

[0011] Figure 2 It is Figure 1 A direction view of the clamp spring position.

[0012] Figure 3 It is the structure schematic diagram of the utility model assembly.

[0013] Figure 4 It is the structure schematic diagram of prior art assembly.

[0014] Figure 5 It is Figure 4 B direction view of the clamp spring position.

[0015] Mark explanation: spline cover 1, clamp spring groove A11, chamfer 12, spline shaft 2, clamp spring groove B21, clamp spring body 3, contact position 4, existing clamp spring 5. DETAILED DESCRIPTION

[0016] The utility model will be introduced in detail in combination with the drawings:

[0017] Embodiment: as shown in the drawing, this anti -disengagement structure clamp spring includes spline cover 1, clamp spring groove A11, chamfer 12, spline shaft 2, clamp spring groove B21, clamp spring body 3 and contact position 4. Figures 1 to 3 Reference is made to the drawing,

[0018] , the clamp spring body 3 is set in the clamp spring groove B21 of spline shaft 2, when assembling, spline shaft 2 and spline cover 1 are matched through spline, make the clamp spring body 3 clamp into the clamp spring groove A11 of spline cover 1. Figure 1 Figure 2 ​As shown, the contact position 4 of the bottom of the clamp spring body 3 with the clamp spring groove B21 is designed as a straight edge structure, which, compared with the arc structure in the prior art, makes the clamp spring have stronger elastic deformation capacity, and the clamp spring can better reset to the original state size after being compressed, without the phenomenon of smaller outer diameter size caused by compression, and can better adapt to the clamp spring groove, effectively fixing the axial position of the spline shaft and the spline sleeve, and preventing pull-out.

[0019] Preferably, a chamfer 12 is formed at the mouth of the spline sleeve 1, which can gradually compress the clamp spring during assembly, facilitating the guiding of the clamp spring into the clamp spring groove.

[0020] The working process of the utility model is as follows: Figure 1 As shown, during assembly, the clamp spring body 3 is sleeved into the clamp spring groove B21 of the spline shaft 2, and the clamp spring body 3 is in contact with the clamp spring groove B21 through the straight edge contact position 4. Then, the spline shaft 2 is gradually inserted into the spline sleeve 1, so that the clamp spring body 3 is gradually compressed under the action of the chamfer 12. With continuous insertion, the clamp spring groove B21 of the spline shaft 2 is aligned with the clamp spring groove A11 of the spline sleeve 1 at the same position, at which time the clamp spring body 3 gradually springs open, and the outer diameter of the clamp spring is inserted into the clamp spring groove A11 of the spline sleeve 1, at which time the clamp spring fixes the axial position of the spline shaft 2 and the spline sleeve 1, so that they cannot move axially relative to each other. The straight edge contact position 4 well ensures the elastic force of the clamp spring body 3 when resetting and rebounding, that is, increases the elastic potential energy of the compressed clamp spring body 3.

[0021] As shown, Figure 2 The bottom diameter of the clamp spring groove B21 is d, and the outer diameter of the clamp spring body 3 after assembly is D1, as shown, Figure 5 As shown, the outer diameter of the existing clamp spring 5 after assembly is D0, and D1>D0, so that the deformation amount of the compressed clamp spring body 3 is larger, the elastic potential energy is more, the elastic force during resetting and rebounding is larger, and the outer diameter size of the clamp spring after the compression assembly process is reset to the original state size.

[0022] It can be understood that equivalent replacement or change of the technical scheme and the utility model concept of the utility model by those skilled in the art should belong to the protection range of the claims attached to the utility model.

Claims

1. A type of anti-detachment snap ring, characterized in that: The application relates to a spline sleeve (1) and a spline shaft (2) which are matched with each other, wherein the spline sleeve (1) comprises a clamping spring body (3) which is sleeved in a clamping spring groove B (21) of the spline shaft (2), and when assembled, the spline shaft (2) is matched with the spline sleeve (1) so that the clamping spring body (3) is clamped in a clamping spring groove A (11) of the spline sleeve (1); and a straight edge structure is adopted at a contact position (4) of the clamping spring body (3) and the clamping spring groove B (21).

2. The anti-disengagement structure of the clamp spring according to claim 1, characterized in that: A chamfer (12) is arranged at the opening of the spline sleeve (1).

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