Improved structure of quick-release mandrel of bicycle

Abstract

The utility model relates to an improved structure of a quick-release mandrel of a bicycle, which comprises a quick-release handle, a shaft lever and a clamping piece, a groove and a caulking groove are concavely arranged on one end face of the shaft rod, the caulking groove is gradually expanded towards the groove, an elastic piece is arranged on the inner wall face of the groove, a clamping portion is sleeved on the outer wall face of a clamping piece, and after two ends of the clamping piece are respectively combined with the quick release handle and the shaft rod, the clamping portion is embedded in the caulking groove. The two side faces of the clamping part abut against the inner wall face of the caulking groove and the end face of one end base of the quick release handle respectively, the inner wall of the shaft rod can abut against the elastic piece and the clamping part at the same time, and the clamping piece and the shaft rod can be stably combined through the two supporting positions of the elastic piece and the clamping part. The purpose of noise reduction is achieved when the bicycle runs.

Description

Technical Field

[0001] The utility model relates to a quick-release structure, in particular to an improved structure of a quick-release spindle of a bicycle which can quickly combine a frame of a bicycle with a wheel. Background Art

[0002] The existing bicycle quick-release spindle structure includes a quick-release handle, a clamping part and a shaft rod. One end of the quick-release handle is an end seat, and the end seat is axially recessed with an inner groove; the shaft rod is axially penetrated with a through groove, and an inner ring groove is recessed on the inner wall of the shaft rod, and an elastic member is arranged in the inner ring groove; the clamping part is an elongated rod body with equal diameter, and the two ends of the clamping part are respectively penetrated in the inner groove of the quick-release handle and the through groove of the shaft rod, and the outer wall surface of the clamping part is in contact with the inner edge of the elastic member. Through the above structure, through the setting of the clamping part, the quick-release handle and the shaft rod can be simply combined with each other, that is, they can be used to fix the frame and wheels of the bicycle.

[0003] However, in order to make the existing clamping part easy to be inserted into the shaft rod, the clamping part will have tolerance during production, so that the diameter of the clamping part is smaller than the diameter of the through groove. Therefore, a gap is generated when the clamping part and the shaft rod are assembled. Only the single elastic part is sleeved on the outer wall surface of the clamping part, and the buffering and stabilizing effect between the clamping part and the shaft rod is poor. As a result, when the bicycle is running, the clamping part will hit the inner wall surface of the shaft rod due to swinging and continuously make noise. There is indeed a need for improvement. Utility Model Content

[0004] In order to improve the problem of common clamping parts in the prior art hitting the inner wall of the shaft rod and generating noise due to poor tolerance or stability, the utility model provides an improved structure of a bicycle quick-release spindle.

[0005] In one embodiment of the utility model, an improved structure of a bicycle quick-release spindle is disclosed, comprising a quick-release handle, a shaft and a clamping piece. The shaft is provided with an embedding groove on a shaft end face, a groove is provided on the bottom of the embedding groove, an inner ring groove is formed on the inner wall of the groove, an elastic member is provided on the inner ring groove, and the diameter of the embedding groove gradually expands from the shaft end face toward the groove. One end of the clamping piece is coupled to the quick-release handle, and the other end is detachably inserted into the groove. A clamping part is sleeved on the outer wall of the clamping piece, and the shape of the outer peripheral wall of the clamping part corresponds to the shape of the inner wall of the embedding groove, wherein when the clamping piece is coupled with the quick-release handle and the groove, at least a part of the clamping part is embedded in the embedding groove, and the two side surfaces of the clamping part are respectively abutted against the bottom surface of the embedding groove and the quick-release handle.

[0006] In an embodiment of the present invention, the clamping portion is flat, and the axial length of the clamping portion is greater than the depth of the embedding groove, so that when the clamping portion is disposed in the embedding groove, there is a gap between the quick-release handle and the shaft rod.

[0007] In an embodiment of the present invention, the outer wall surface of the clamping member is concave toward the central axis to form a limiting recess, and the limiting recess abuts against the inner edge of the elastic member.

[0008] In an embodiment of the present invention, the clamping portion is a soft structure.

[0009] In one embodiment of the present invention, the shaft has a constant diameter and a radial cross section of the shaft is hexagonal, and the cross section of the hole of the clamping part corresponding to the clamping part is circular or hexagonal.

[0010] Through the above structure, the advantages of the utility model are as follows:

[0011] Firstly, when the clamping part is assembled with the shaft rod, the elastic part and the clamping portion can provide buffering and supporting effects, reduce the influence of tolerance on the clamping part during production, and improve the stability of the combination of the clamping part and the shaft rod, so as to achieve the effect of reducing the noise generated by the arbitrary swinging of the clamping part when the bicycle is running.

[0012] Furthermore, due to the inclined structure of the embedding groove, when the user removes the locking member from the shaft, the locking portion will not fall directly from the embedding groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the use state of the utility model;

[0014] Figure 2 It is a side cross-sectional schematic diagram of a preferred embodiment of the utility model;

[0015] Figure 3 It is a partially enlarged cross-sectional schematic diagram of a preferred embodiment of the utility model;

[0016] Figure 4A It is a schematic diagram of some components of the first preferred embodiment of the utility model;

[0017] Figure 4B It is a schematic diagram of some components of the second preferred embodiment of the utility model.

[0018] Explanation of symbols:

[0019] 10: Quick release handle

[0020] 101: End seat end face

[0021] 20: Axis

[0022] 201: shaft end face

[0023] 22: Groove

[0024] 221: Inner ring groove

[0025] 24: Bezel

[0026] 26: Elastic parts

[0027] 30: Card parts

[0028] 32: Card Department

[0029] 34: Limiting recess

[0030] 40: Gap

[0031] A: Bicycle DETAILED DESCRIPTION

[0032] The following will explain the content of the utility model through embodiments. The embodiments of the utility model are not intended to limit the utility model to any specific environment, application or special method as described in the embodiments. Therefore, the description of the embodiments is only for the purpose of explaining the utility model, and is not intended to limit the utility model. It should be noted that in the following embodiments and drawings, elements that are not directly related to the utility model have been omitted and not drawn, and the dimensional relationship between the elements in the drawings is only for easy understanding, and is not intended to limit the actual proportion.

[0033] See also Figure 1 The improved bicycle quick-release spindle structure of the utility model is used to be arranged between the frame and the wheel of a bicycle A. By loosening the bicycle quick-release spindle structure and then pulling out the bicycle quick-release spindle structure, the frame and the wheel of the bicycle A can be separated. By tightening the bicycle quick-release spindle structure, the frame and the wheel of the bicycle A can be firmly combined.

[0034] See also Figure 2 and Figure 3 , discloses an improved structure of a bicycle quick-release spindle, comprising a quick-release handle 10, a shaft rod 20 and a clamping member 30.

[0035] The shaft 20 is provided with a groove 22 on a shaft end surface 201, and an inner ring groove 221 is provided on the inner wall surface of the groove 22. An elastic member 26 is disposed in the inner ring groove 221. Furthermore, the shaft end surface 201 and the groove 22 are coaxially provided with an embedding groove 24, wherein the diameter of the embedding groove 24 gradually expands from the shaft end surface 201 toward the groove 22.

[0036] One end of the clamping member 30 is coupled to one end of the quick release handle 10, and the other end of the clamping member 30 is detachably inserted into the groove 22, wherein the maximum diameter of the clamping member 30 is slightly smaller than the maximum diameter of the groove 22, so that the clamping member 30 can be detachably inserted into the groove 22. The outer sleeve of the clamping member 30 is provided with a clamping portion 32 which is flat as a whole, and the overall shape of the outer peripheral wall of the clamping portion 32 corresponds to the inclined structure of the inner wall surface of the embedding groove 24, wherein the axial length of the clamping member 30 is greater than the depth formed by the axial extension of the embedding groove 24.

[0037] When the clamping part 30 is combined with the quick-release handle 10 and the groove 22, since the outer peripheral wall of the clamping part 32 corresponds to the shape of the inner wall surface of the embedding groove 24, and the axial length of the clamping part 30 is greater than the depth of the embedding groove 24, at least a part of the clamping part 32 is embedded in the embedding groove 24, and the two side surfaces of the clamping part 32 are respectively abutted against the groove bottom surface formed by the embedding groove 24 and the quick-release handle 10, and a gap 40 is left between the quick-release handle 10 and the shaft 20.

[0038] Through the above structure, when the clamping part 30 is assembled with the shaft rod 20, there are at least two contact support positions between the clamping part 30 and the inner wall surface of the shaft rod 20, one of which is supported by the elastic part 24 as a buffer, and the other is supported by the clamping part 32 embedded in the embedding groove 24 and sleeved on the outer wall surface of the clamping part 30 as a support buffer. The contact supports at the above two locations can improve the stability of the clamping part 30 when combined with the shaft rod 20, reduce the influence of the tolerance of the clamping part 30 during production, so as to achieve the effect of reducing the noise generated by the clamping part 30 due to arbitrary swinging when the bicycle is running.

[0039] In addition, when the user removes the locking member 30 from the shaft 20 , the inclined structure of the embedding groove 24 will limit the displacement of the locking portion 32 , so that the locking portion 32 will not fall directly from the embedding groove 24 .

[0040] Due to the structural relationship that the axial length of the clamping member 30 is greater than the depth of the embedding groove 24, when the clamping portion 32 is disposed in the embedding groove 24, the clamping portion 32 protrudes from the embedding groove 24, and there is a gap 40 between an end seat end face 101 of the quick release handle 10 and the shaft end face 201. In this way, the sound generated when the end seat end face 101 and the shaft end face 201 directly contact and rub against each other can be avoided, and the contact wear between the quick release handle 10 and the shaft 20 can be reduced, further improving the service life of the improved structure of the bicycle quick release spindle of the utility model.

[0041] Continue reading Figure 3The outer wall surface of the clamping member 30 is concave toward the central axis to form a limiting recess 34, and the limiting recess 34 is against the inner edge of the elastic member 26. The limiting recess 34 cooperates with the inner annular groove 221 to enable the elastic member 26 to achieve a limiting effect and prevent the elastic member 26 from moving at will.

[0042] The clamping portion 32 is a soft structure, which is made of nitrile rubber (Nitrile Butadiene Rubber, NBR), thermoplastic rubber (Thermo-Plastic-Rubber material, TPR) or silicone.

[0043] The soft structure can enhance the buffering capability of the clamping portion 32 and further enhance the effect of shock absorption and noise reduction.

[0044] See also Figure 4A and Figure 4B And with Figure 3 The clamping part 32 is axially penetrated with a hole, and the hole is used to be sleeved around the outer periphery of the clamping part 30. The shape of the hole is not limited, and the minimum diameter formed by the hole is equal to the outer diameter formed by any part of the clamping part 32, so that the clamping part 32 can support the opposite sides of the clamping part 32. Preferably, the cross-sectional shape of the surrounding of any part of the clamping part 32 corresponding to the hole enables the hole to surround and cover the surrounding of any part of the clamping part 32. In this embodiment, the clamping part 32 can be a cylinder or a common hexagonal element, and the hole can be presented in a circular or hexagonal shape corresponding to the cylinder or the hexagonal element.

[0045] The above-described embodiments are merely preferred embodiments for fully illustrating the present invention and are not intended to limit the features of the present invention. Any modification, equivalent replacement, improvement, etc. made using the relevant technical means and creation principles of the present invention still falls within the scope of the equivalent structural creativity of the present invention.

Claims

1. An improved structure of a bicycle quick-release spindle, characterized in that: Include: A quick release handle; A shaft rod, wherein an embedding groove is formed on an end face of the shaft rod, a groove bottom of the embedding groove is formed, an inner ring groove is formed on the inner wall of the groove, an elastic member is disposed in the inner ring groove, and a diameter of the embedding groove gradually expands from the end face of the shaft rod toward the groove; and A clamping piece, one end of which is combined with the quick-release handle, and the other end of which is detachably inserted into the groove. A clamping portion is sleeved on the outer wall of the clamping piece, and the shape of the outer peripheral wall of the clamping portion corresponds to the shape of the inner wall of the embedding groove. When the clamping piece is combined with the quick-release handle and the groove, at least a part of the clamping portion is embedded in the embedding groove, and the two side surfaces of the clamping portion are respectively abutted against the bottom surface of the embedding groove and the quick-release handle.

2. The improved structure of the bicycle quick-release spindle according to claim 1, characterized in that: The clamping portion is flat, and the axial length of the clamping portion is greater than the depth of the embedding groove, so that when the clamping portion is arranged in the embedding groove, there is a gap between the quick-release handle and the shaft rod.

3. The improved structure of the bicycle quick-release spindle according to claim 1 or 2, characterized in that: The outer wall surface of the clamping piece is concave toward the central axis to form a limiting recess, and the limiting recess abuts against the inner edge of the elastic piece.

4. The improved structure of the bicycle quick-release spindle as claimed in claim 3, characterized in that: The clamping part is a soft structure.

5. The improved structure of the bicycle quick-release spindle as claimed in claim 4, characterized in that: The shaft has a constant diameter and a hexagonal radial cross section. The cross section of the hole corresponding to the clamping portion sleeved on the clamping piece is circular or hexagonal.

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