Wheel axle for quick-release wheel

Abstract

The wheel axle is a spline shaft, limiting grooves are formed in a spline on the outer wall face of the wheel axle, the limiting grooves are located in the same circumferential direction, the axial moving direction towards the outer sides of the limiting grooves is the wheel dismounting direction, and the axial moving direction towards the inner sides of the limiting grooves is the wheel mounting direction. The inclination angle of the groove wall of the outer side of the V-shaped groove is larger than that of the groove wall of the inner side of the V-shaped groove. Due to the fact that the inclination angle of the groove wall of the installation side is small, the balls falling into the limiting grooves are difficult to break away from the limiting grooves when bearing inward axial force. And the inclined angle of the groove wall on the dismounting side is large, so that when the balls are subjected to outward axial force, the balls are easily separated from the limiting grooves.

Description

Technical Field

[0001] The utility model relates to a wheel axle for a quick-detachable wheel. Background Art

[0002] One structure of a trolley with a spring ball quick-release structure includes: a ball elastically supported on the wheel and a ball hole set on the wheel shaft. When the wheel is assembled, the wheel moves along the axial direction of the wheel shaft. After a "click" sound is heard, it indicates that the ball falls into the ball hole, thereby completing the assembly of the wheel and the wheel shaft. The existing structure has the defect that when moving in the axial direction of the wheel shaft and pressing the wheel in, if too much force is used, it will easily cause the ball to escape from the ball hole after entering the ball hole, and then the wheel must be moved in the opposite direction to make the ball fall into the ball hole again, resulting in poor use effect. Summary of the invention

[0003] The utility model provides a wheel axle for a quick-release wheel in order to solve the problems existing in the prior art.

[0004] The technical solutions adopted in this utility model are:

[0005] A wheel axle for a quick-release wheel, the wheel axle being a splined axle, and limit grooves being arranged on the splines on the outer wall of the wheel axle, all the limit grooves being located in the same circumferential direction, the axial movement direction toward the outer side of the limit groove being the wheel removal direction, and the axial movement direction toward the inner side of the limit groove being the wheel installation direction, the limit groove being a V-shaped groove, and the inclination angle of the outer groove wall of the V-shaped groove being greater than the inclination angle of the inner groove wall.

[0006] Furthermore, the inclination angle of the inner groove wall of the V-shaped groove is 90-120°.

[0007] Furthermore, the inclination angle of the outer groove wall of the V-shaped groove is 150-165°.

[0008] The utility model has the following beneficial effects:

[0009] Since the groove wall on the installation side has a small inclination angle, it is difficult for the ball that falls into the limit groove to escape from the limit groove when it is subjected to an inward axial force. However, the groove wall on the removal side has a large inclination angle, so when the ball is subjected to an outward axial force, it is easy for the ball to escape from the limit groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural diagram of the utility model.

[0011] Figures 2 to 4 This is an application structure diagram of the utility model.

[0012] Figure 5 for Figures 2 to 4Schematic diagram of the overall assembly of the structure on the wheel. DETAILED DESCRIPTION

[0013] The utility model is further described below in conjunction with the accompanying drawings.

[0014] like Figure 1 The utility model discloses a wheel axle for quick-release wheels. The wheel axle 1 is a spline axle. A limiting groove 10 is arranged on the spline of the outer wall of the wheel axle 1. All limiting grooves 10 are located in the same circumferential direction. The axial movement direction toward the outer side of the limiting groove 10 is the wheel disassembly direction, and the axial movement direction toward the inner side of the limiting groove 10 is the wheel installation direction (the spline part is located on the outer side of the wheel axle). The limiting groove 10 is a V-shaped groove. The inclination angle of the outer groove wall of the V-shaped groove is greater than the inclination angle of the inner groove wall. The inclination angle of the inner groove wall is 90-120°, and the inclination angle of the outer groove wall is 150-165°.

[0015] by Figures 2 to 5 Taking an application structure as an example, a quick release sleeve 4 is installed on the wheel, a plurality of balls 30 are arranged in the circumferential direction of the quick release sleeve 4, a spring 7 is sleeved on the quick release sleeve 4, and a mounting seat 3 is fixed on the wheel, one end of the spring 7 abuts against the quick release sleeve 4, and the other end abuts against the inner cavity wall of the quick release sleeve 4. After the ball 30 is separated from the limiting groove 10, the step surface of the inner end surface of the mounting seat 3 abuts against the ball 30 through the spring force of the spring, and the ball abuts against the ball hole 41 of the quick release sleeve 4 (the above content is only a general structural description of the structure of an application scenario of the wheel axle of the utility model, and it is not It is the content of the utility model, so the principle is not explained in detail). When assembling the wheel, due to the spring force, the step surface a always contacts the ball. The step surface is set to an inclined structure, which can make the ball contacted in the ball hole 41 obtain a downward force. At the moment of contacting the limiting groove 10, the roller can quickly fall into the limiting groove 10. In order to avoid the phenomenon that the ball is "pushed through" the limiting groove 10 when assembling the wheel, the limiting groove 10 in the utility model adopts a V-shaped groove, and the inclination angle of the outer groove wall of the V-shaped groove is greater than the inclination angle of the inner groove wall. When the wheel is installed, due to Figure 5 The left side groove wall has a smaller inclination angle, so when the ball 30 falls into the limiting groove is subjected to a leftward axial force, it is difficult to get out of the limiting groove 10. The right side groove wall has a larger inclination angle, and when the ball is subjected to a rightward axial force, the ball is easy to get out of the limiting groove.

[0016] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A wheel axle for a quick-release wheel, characterized in that: The wheel axle is a splined axle, and a limiting groove (10) is provided on the spline on the outer wall of the wheel axle, and all the limiting grooves (10) are located in the same circumferential direction, and the axial movement direction toward the outer side of the limiting groove (10) is the wheel removal direction, and the axial movement direction toward the inner side of the limiting groove (10) is the wheel installation direction, and the limiting groove (10) is a V-shaped groove, and the inclination angle of the outer groove wall of the V-shaped groove is greater than the inclination angle of the inner groove wall.

2. The wheel axle for a quick-release wheel according to claim 1, characterized in that: The inclination angle of the inner groove wall of the V-shaped groove is 90-120°.

3. The wheel axle for a quick-release wheel according to claim 1, characterized in that: The inclination angle of the outer groove wall of the V-shaped groove is 150-165°.

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