CN210128023U - Wheel and shaft connection structure - Google Patents

Abstract

The utility model relates to a wheel and shaft connection structure. Including wheel and shaft, there is a shaft hole in the center of the wheel, the wheel is matched with the shaft through the shaft hole, there is a shaft shoulder on the shaft, the shaft shoulder is the wheel positioning, and the shaft hole at the non-positioning end of the wheel has a coaxial expansion tightening with the wheel shaft hole. Ring groove, expander is evenly distributed in the ring groove. It has simple structure, firm connection, quick disassembly, and can be reused many times. The disassembly and assembly will not damage the wheel and the shaft, and the wheel and the shaft will not be damaged during use.

Description

Wheel and shaft connection structure

technical field

The utility model relates to a connection structure, in particular to a connection structure of a wheel and a shaft.

Background technique

At present, the traditional connection between the wheel and the shaft uses a key connection. Both the wheel and the shaft are machined with a keyway, and the wheel and the shaft are connected together by installing a key to complete the rotation of the wheel and the shaft.

SUMMARY OF THE INVENTION

In order to overcome the shortcomings of the prior art, the utility model provides a wheel-shaft connection structure. It has simple structure, firm connection, quick disassembly, and can be reused many times. The disassembly and assembly will not damage the wheel and the shaft, and the wheel and the shaft will not be damaged during use.

The technical scheme adopted by the utility model to solve the technical problem is as follows: it includes a wheel and a shaft, the center of the wheel has a shaft hole, the wheel is matched with the shaft through the shaft hole clearance, the shaft has a shaft shoulder, and the shaft shoulder is used for wheel positioning. There is an expansion ring groove coaxial with the axle hole at the shaft hole of the positioning end, and the expansion device is evenly distributed in the expansion ring groove.

The utility model has the advantages of simple structure, firm connection, quick disassembly, repeated use, and no damage to the wheel and the axle during disassembly and assembly, and no damage to the wheel and the axle during use.

Description of drawings

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the front view of the utility model;

Fig. 2 is the right side view of the utility model;

Fig. 3 is the enlarged view of the A place in Fig. 1 of the utility model;

Fig. 4 is the front view of the utility model expander;

Fig. 5 is the right side view of the expansion device of the utility model.

Detailed ways

As shown in Fig. 1-Fig. 3, the utility model comprises a wheel 1 and a shaft 2, the center of the wheel 1 has a shaft hole, the wheel 1 is clearance fit with the shaft 2 through the shaft hole, the shaft 2 has a shaft shoulder 3, and the shaft shoulder 3 is When the wheel 1 is positioned, there is an expansion ring groove 5 coaxial with the shaft hole of the wheel 1 at the shaft hole of the non-positioning end of the wheel 1, and the expansion ring groove 5 is evenly distributed with the expansion device 4.

As shown in Figures 4 and 5, the expander 4 includes an inner cone column 4-1, an outer cone column 4-4, an upper expansion ring 4-2, a lower expansion ring 4-3 and a bolt 4-5. The expansion ring 4-2 has a symmetrical structure with the lower expansion ring 4-3, and its inner surface is a double conical surface with a large radius at the left and right ends and a small radius in the middle. The inner conical column 4-1 and the outer conical column 4-4 which are matched with each other are embedded in the upper expansion ring 4-2 and the lower expansion ring 4-3 respectively. The taper is the same as the taper of the double conical surface of the upper expansion ring 4-2 and the lower expansion ring 4-3. The shaft hole of 4-1 is provided with an inner thread which is matched with the bolt 4-5, the shaft hole of the outer cone column 4-4 is clearance fit with the bolt 4-5, and the bolt 4-5 passes through the outer cone column 4 -4 is screwed and fixed with the inner cone column 4-1. Turning the bolt 4-5 clockwise can make the upper expansion ring 4-2 and the lower expansion ring 4-3 push outwards and tighten the wheel 1 and the shaft 2. Turning the bolt 4-5 counterclockwise can make the upper expansion ring 4-2 and the lower expansion ring 4-3 retract inward and loosen the wheel 1 and the shaft 2.

The radius of the outer cylindrical surface of the upper expansion ring 4-2 and the lower expansion ring 4-3 is the same as the radius of the expansion ring groove 5 .

Claims (3)

1. A wheel and shaft connection structure, its characterized in that: the wheel comprises a wheel (1) and a shaft (2), wherein a shaft hole is formed in the center of the wheel (1), the wheel (1) is in clearance fit with the shaft (2) through the shaft hole, a shaft shoulder (3) is arranged on the shaft (2), the shaft shoulder (3) is positioned for the wheel (1), an expansion ring groove (5) coaxial with the shaft hole of the wheel (1) is formed in the shaft hole of the non-positioning end of the wheel (1), and expansion devices (4) are uniformly distributed in the expansion ring groove (5).

2. The wheel-and-axle connection according to claim 1, wherein: the tensioner (4) comprises an inner cone column (4-1), an outer cone column (4-4), an upper expanding ring (4-2), a lower expanding ring (4-3) and a bolt (4-5), the upper expanding ring (4-2) and the lower expanding ring (4-3) are structurally symmetrical, the inner surface of the upper expanding ring (4-2) is a double-cone surface with large radius at the left end and the right end and small radius at the middle part, the inner cone column (4-1) and the outer cone column (4-4) which are matched with the double-cone surfaces of the upper expanding ring (4-2) and the lower expanding ring (4-3) are respectively embedded in the upper expanding ring (4-2) and the lower expanding ring (4-3), the conicity of the outer surfaces of the inner cone column (4-1) and the outer cone column (4-4) is the same as the double-cone surface of the upper expanding ring (4-2) and the lower expanding ring (4-3), and shaft holes are respectively arranged on the inner cone column (4-1) and the outer cone column (4-4), the shaft hole of the inner conical column (4-1) is provided with an internal thread matched with the bolt (4-5), the shaft hole of the outer conical column (4-4) is in clearance fit with the bolt (4-5), and the bolt (4-5) penetrates through the outer conical column (4-4) to be screwed and fixed with the inner conical column (4-1).

3. The wheel-and-axle connection according to claim 2, wherein: the radiuses of the outer cylindrical surfaces of the upper expanding ring (4-2) and the lower expanding ring (4-3) are the same as the radiuses of the expansion ring grooves (5).

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