Universal chain wheel shaft expansion sleeve

Abstract

The utility model relates to a chain wheel shaft, in particular to a universal chain wheel shaft expansion sleeve. The universal chain wheel shaft expansion sleeve comprises a bolt and the like. An expansion sleeve outer cylinder is installed on the inner side of the chain wheel, an expansion sleeve inner cylinder is installed in the expansion sleeve outer cylinder, a plurality of threaded holes which are the same in size and correspond in position are formed in the left end of the expansion sleeve inner cylinder and the left end of the expansion sleeve outer cylinder respectively, and bolts are connected into the threaded holes in a threaded mode. Due to the design of the expansion sleeve inner cylinder, the expansion sleeve outer cylinder and the bolt, the chain wheel can be taken out for maintenance only by unscrewing the bolt and releasing the pressure between the expansion sleeve inner cylinder and the expansion sleeve outer cylinder, the angle does not need to be adjusted when the chain wheel is installed, the maintenance and assembly processes are simplified, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chain wheel shaft, especially to a universal chain wheel shaft expansion sleeve. BACKGROUND

[0002] Chain wheel shaft is a component in mechanical transmission system, mainly used for installing chain wheel, and realizing mechanical power transmission through chain with it. Simply speaking, chain wheel shaft is used to fix chain wheel, and make chain wheel rotate around it. In mechanical equipment, chain wheel shaft is usually driven by motor or other power source to rotate, and then drive chain wheel to rotate, and chain wheel transmits power to other mechanical parts through chain.

[0003] In the existing chain transmission system, chain wheel is usually fixed by chain wheel shaft and semicircular key to transmit power and torque, but this assembly method has the problem of difficult angle adjustment. When maintaining, the shafting needs to be disassembled as a whole, which takes a long time, and different types of chain wheels cannot be quickly replaced. UTILITY MODEL CONTENTS

[0004] In order to overcome the shortcomings of the existing chain transmission system, such as inconvenient angle adjustment and long time disassembly of shafting during maintenance, the utility model provides a universal chain wheel shaft expansion sleeve.

[0005] The technical scheme is: a universal chain wheel shaft expansion sleeve, comprising:

[0006] Chain wheel;

[0007] Expansion sleeve outer tube, installed inside the chain wheel;

[0008] Expansion sleeve inner tube, installed in the expansion sleeve outer tube; and

[0009] Bolt, threaded connection in the expansion sleeve inner tube and the expansion sleeve outer tube left end.

[0010] Further, it further comprises: motor shaft, fixedly connected in the expansion sleeve inner tube.

[0011] Further, the inner diameter of the expansion sleeve inner tube is greater than the diameter of the motor shaft.

[0012] Further, the diameter of the expansion sleeve outer tube is adjustable.

[0013] Further, the expansion sleeve inner tube is made of stainless steel.

[0014] Further, the expansion sleeve outer tube has an opening at the top.

[0015] Further, the expansion sleeve outer tube and the chain wheel are connected by interference fit.

[0016] Further, the bolt is made of high-strength and corrosion-resistant material.

[0017] Further, the inner cylinder of the expansion sleeve is provided with an abrasive surface.

[0018] Further, the surface of the sprocket is hardened.

[0019] The utility model has the advantages that: the utility model discloses an inner cylinder of expansion sleeve, expansion sleeve outer tube and bolt design, only need to loosen the bolt, remove the pressure between the inner cylinder of expansion sleeve and expansion sleeve outer tube, can take out the sprocket to carry out maintenance, and when installing the sprocket, angle does not need to be adjusted, simplifies maintenance and assembly process, improves work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0021] Figure 2 It is an explosion view of the utility model.

[0022] Figure 3 It is a structure schematic view of bolt, inner cylinder of expansion sleeve and expansion sleeve outer tube of the utility model.

[0023] Among them: 1 - motor shaft, 2 - bolt, 3 - inner cylinder of expansion sleeve, 4 - expansion sleeve outer tube, 401 - opening, 5 - sprocket. DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with specific embodiments, and it also needs to be explained that unless there are explicit provisions and limitations, terms such as: setting, installation, connection, connection should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrally connected, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0025] A general sprocket shaft expansion sleeve, like Figures 1-3As shown, the device includes a bolt 2, an inner expansion sleeve 3, an outer expansion sleeve 4, and a sprocket 5. The outer expansion sleeve 4 is installed inside the sprocket 5. The diameter of the outer expansion sleeve 4 is adjustable, allowing for more flexible installation and adaptability. This facilitates the connection between the outer expansion sleeve 4 and the motor shaft 1 of different specifications and the sprocket 5. The outer expansion sleeve 4 and the sprocket 5 are connected by an interference fit to ensure a stable fixation between them and achieve efficient power transmission. The top of the outer expansion sleeve 4 has an opening 401, which helps the outer expansion sleeve 4 to expand evenly under stress. The inner expansion sleeve 3 is installed inside the outer expansion sleeve 4. The outer surface of the inner expansion sleeve 3... The frosted finish increases the friction with the outer sleeve 4. The inner sleeve 3 is made of stainless steel, which enhances its corrosion resistance and wear resistance, thus extending the service life of the device and ensuring stable performance under various working environments. The left ends of the inner sleeve 3 and the outer sleeve 4 each have several threaded holes of the same size and corresponding positions. Bolts 2 are threaded into the threaded holes. The bolts 2 are made of high-strength, corrosion-resistant material to ensure that they will not loosen or break during long-term operation. The surface of the sprocket 5 is hardened to improve its wear resistance and effectively extend its service life.

[0026] like Figure 1 As shown, it also includes a motor shaft 1, and the motor shaft 1 is fixedly connected inside the expansion sleeve inner cylinder 3. In the traditional assembly of sprocket 5, a semi-circular key is usually used to realize the torque transmission between sprocket 5 and motor shaft 1. When it is necessary to replace sprocket 5, the semi-circular key must be removed first, which increases the complexity of operation and time cost. After using the expansion sleeve design, the connection between sprocket 5 and motor shaft 1 no longer depends on the semi-circular key, which simplifies the maintenance process and reduces downtime. The inner diameter of the expansion sleeve inner cylinder 3 is larger than the diameter of motor shaft 1.

[0027] In use, first, place the inner sleeve 3 onto the motor shaft 1, then insert the outer sleeve 4 into the sprocket 5. Next, insert the inner sleeve 3 into the inner side of the outer sleeve 4, align the bolt 2 with the threaded hole and tighten the bolt 2. At this time, radial pressure will be generated between the inner sleeve 3 and the outer sleeve 4, so that the inner sleeve 3 and the outer sleeve 4 are tightly fitted with the surface of the motor shaft 1 and the inner hole of the sprocket 5, respectively. If it is necessary to replace or repair the sprocket 5, simply loosen the bolt 2 to release the radial pressure between the inner sleeve 3 and the outer sleeve 4, so that the tight fit between the inner sleeve 3 and the motor shaft 1, and between the outer sleeve 4 and the inner hole of the sprocket 5 is released. At this time, the sprocket 5 can be easily removed for repair.

[0028] The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application.

Claims

1. A universal sprocket shaft bushing, characterized by, Comprise: a chain wheel (5); a bushing outer cylinder (4) installed inside the chain wheel (5); a bushing inner cylinder (3) installed inside the bushing outer cylinder (4); and a bolt (2) threadedly connected to the left end of the bushing inner cylinder (3) and the bushing outer cylinder (4).

2. A universal sprocket shaft bushing as claimed in claim 1, wherein, Further comprise: a motor shaft (1) fixedly connected to the inside of the bushing inner cylinder (3).

3. A universal sprocket shaft bushing as defined in claim 2 wherein, The inside diameter of the bushing inner cylinder (3) is greater than the diameter of the motor shaft (1).

4. A universal sprocket shaft bushing as defined in claim 3 wherein, The diameter of the bushing outer cylinder (4) is adjustable.

5. A universal sprocket shaft bushing as defined in claim 4 wherein, The bushing inner cylinder (3) is made of stainless steel.

6. A universal sprocket shaft bushing as defined in claim 5 wherein, An opening (401) is provided at the top of the bushing outer cylinder (4).

7. A universal sprocket shaft bushing as defined in claim 6 wherein, The bushing outer cylinder (4) and the chain wheel (5) are connected by interference fit.

8. A universal sprocket shaft bushing as defined in claim 7 wherein, The bolt (2) is made of high-strength and corrosion-resistant material.

9. A universal chain wheel shaft bushing according to claim 8, wherein the outer surface of the bushing inner cylinder (3) is treated with frosted finish.

10. A universal chain wheel shaft bushing according to claim 9, wherein the surface of the chain wheel (5) is hardened.

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