Quick expansion sleeve for synchronizing wheel

Abstract

The utility model relates to a synchronizing wheel, in particular to a quick expansion sleeve for the synchronizing wheel. The quick expansion sleeve for the synchronizing wheel comprises an outer expansion sleeve and the like, the inner expansion sleeve is installed in the outer expansion sleeve, a threaded groove is formed in the outer side of the left portion of the inner expansion sleeve, a locking nut is connected to the threaded groove in a threaded mode, the outer side of the right portion of the inner expansion sleeve is designed to be an inclined face, the shaft is installed in the inner expansion sleeve, and a synchronous wheel is arranged on the outer side of the outer expansion sleeve. The shaft and the synchronizing wheel can be locked by screwing the locking nut, the shaft and the synchronizing wheel can be disassembled by unscrewing the locking nut, the shaft and the synchronizing wheel are convenient to assemble and disassemble, each circle of the shaft is uniformly stressed, and the centering is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a synchronous wheel, especially a synchronous wheel quick expansion sleeve. BACKGROUND

[0002] The synchronous wheel expansion sleeve usually refers to a component used in a synchronous belt transmission system, which can realize the close connection between the shaft and the synchronous wheel.

[0003] The existing synchronous wheel expansion sleeve deforms the inner expansion sleeve and the outer expansion sleeve through locking screws to lock the shaft and the synchronous wheel, and a large number of screws are required, and the locking force of each screw is different, which can cause the deviation of the centering, and the locking requires a long time. UTILITY MODEL CONTENT

[0004] In order to overcome the shortcomings of the traditional synchronous wheel expansion sleeve, such as the dependence on multiple screws for locking, uneven locking force, and low locking efficiency, the utility model can provide a synchronous wheel quick expansion sleeve.

[0005] Technical scheme: a synchronous wheel quick expansion sleeve, comprising:

[0006] an outer expansion sleeve;

[0007] an inner expansion sleeve installed in the outer expansion sleeve;

[0008] a locking nut threadedly connected to the outer side of the left part of the inner expansion sleeve and provided with a threaded groove;

[0009] a shaft installed in the inner expansion sleeve; and

[0010] a synchronous wheel arranged on the outer side of the outer expansion sleeve.

[0011] Further, the outer expansion sleeve adopts a light and thin design.

[0012] Further, the inner expansion sleeve adopts a thickened design.

[0013] Further, the inner expansion sleeve and the outer expansion sleeve are made of high-strength stainless steel.

[0014] Further, the right outer side of the inner expansion sleeve is provided with six grooves.

[0015] Further, the outer expansion sleeve is provided with an opening.

[0016] Further, the contact surface of the inner expansion sleeve and the outer expansion sleeve is subjected to nitriding treatment.

[0017] Further, the outer diameter of the outer expansion sleeve matches the inner diameter of the synchronous wheel.

[0018] Further, the surface of the shaft is subjected to polishing treatment.

[0019] Further, the edges of the outer expansion sleeve and the inner expansion sleeve are subjected to chamfering treatment.

[0020] The utility model has the advantages that the utility model tightens the lock nut, can lock the shaft and the synchronous wheel, loosens the nut, can dismount the shaft and the synchronous wheel, is convenient to install and dismount, the shaft is evenly stressed every circle, and the centering is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0022] Figure 2 It is the explosion drawing of the utility model.

[0023] Figure 3 It is the structure schematic diagram of the utility model outer expansion sleeve and lock nut.

[0024] Figure 4 It is the explosion drawing of the utility model outer expansion sleeve, inner expansion sleeve and lock nut.

[0025] The meaning of the reference signs in the drawing: 1, outer expansion sleeve, 101, opening, 2, inner expansion sleeve, 3, lock nut, 4, shaft, 5, synchronous wheel. DETAILED DESCRIPTION

[0026] The embodiments of the utility model are explained below with reference to the drawings.

[0027] A synchronous wheel quick expansion sleeve, such as Figures 1-4As shown, it comprises an outer sleeve 1, an inner sleeve 2, a locking nut 3, a shaft 4 and a synchronous wheel 5, the inner sleeve 2 is installed in the outer sleeve 1, the outer sleeve 1 adopts a light and thin design, the traditional locking mode through a circle of screws is cancelled, thus it is unnecessary to have a thick structure, the material consumption is reduced and the processing cost is lowered, since the outer sleeve 1 no longer needs a thick structure to realize the locking function, the inner sleeve 2 can correspondingly adopt a thickening design to improve the overall strength and the compression resistance, the left outer side of the inner sleeve 2 is provided with a threaded groove, the locking nut 3 is threadedly connected on the threaded groove, the right outer side of the inner sleeve 2 is designed as an inclined surface, the shaft 4 is installed in the inner sleeve 2, the surface of the shaft 4 is polished to reduce the friction and improve the installation precision, the outer sleeve 1 is provided with the synchronous wheel 5 on the outer side, the inner diameter of the outer sleeve 1 and the synchronous wheel 5 is matched to ensure the installation precision, the outer sleeve 1 is provided with an opening 101, the existence of the opening 101 is helpful for the outer sleeve 1 to uniformly expand under stress, the right outer side of the inner sleeve 2 is provided with six grooves to enhance the elasticity and adaptability of the inner sleeve 2, ensure the inner sleeve 2 to have more uniform clamping force and higher stability, the inner sleeve 2 and the outer sleeve 1 both adopt a high-strength stainless steel material to ensure sufficient strength and elasticity under high load conditions, provide stable and reliable clamping force and long service life, the contact surface of the inner sleeve 2 and the outer sleeve 1 is subjected to nitriding treatment to enhance the wear resistance and prolong the service life of the synchronous wheel quick expansion sleeve, the edges of the outer sleeve 1 and the inner sleeve 2 are chamfered to avoid sharp edges to cause injury to the operators and facilitate installation.

[0028] In use, first, the left part of the inner sleeve 2 is inserted into the outer sleeve 1, the inclined surfaces of the inner sleeve 2 and the outer sleeve 1 are matched with each other, the locking nut 3 is rotated, the locking nut 3 makes the inner sleeve 2 and the outer sleeve 1 close to each other, the right part of the inner sleeve 2 is deformed to shrink inward to lock the shaft 4 under the extrusion of the inner inclined surface of the outer sleeve 1, the outer sleeve 1 is expanded outward to lock the synchronous wheel 5 under the reaction force of the outer inclined surface of the inner sleeve 2, the shaft 4 is uniformly stressed every circle, the centering is more accurate: conversely, the locking nut 3 is loosened to be disassembled.

[0029] The above embodiments are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A synchronous wheel quick expansion sleeve, characterized in that it comprises: an outer expansion sleeve (1); an inner expansion sleeve (2) installed in the outer expansion sleeve (1); a locking nut (3) threaded on the left outer side of the inner expansion sleeve (2) with a threaded groove; a shaft (4) installed in the inner expansion sleeve (2); and a synchronous wheel (5) provided on the outer side of the outer expansion sleeve (1).

2. A quick expansion sleeve for a synchronous wheel as claimed in claim 1, characterized in that The outer expansion sleeve (1) adopts a light and thin design.

3. A quick expansion sleeve for a synchronous wheel as claimed in claim 2, characterized in that The inner expansion sleeve (2) adopts a thickened design.

4. A quick expansion sleeve for a synchronous wheel as claimed in claim 3, characterized in that, The inner expansion sleeve (2) and the outer expansion sleeve (1) are both made of high-strength stainless steel.

5. A quick expansion sleeve for a synchronous wheel as claimed in claim 4, characterized in that Six grooves are provided on the right outer side of the inner expansion sleeve (2).

6. A quick expansion sleeve for a synchronous wheel as claimed in claim 5, characterized in that An opening (101) is provided on the outer expansion sleeve (1).

7. A quick expansion sleeve for a synchronous wheel as claimed in claim 6, characterized in that The contact surfaces of the inner expansion sleeve (2) and the outer expansion sleeve (1) are subjected to nitriding treatment.

8. A quick expansion sleeve for a synchronous wheel as claimed in claim 7, characterized in that The inner diameter of the outer expansion sleeve (1) and the synchronous wheel (5) are matched.

9. A quick expansion sleeve for a synchronous wheel as claimed in claim 8, characterized in that, The surface of the shaft (4) is subjected to polishing treatment.

10. A quick expansion sleeve for a synchronous wheel as claimed in claim 9, characterized in that The edges of the outer expansion sleeve (1) and the inner expansion sleeve (2) are subjected to chamfering treatment.

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