Coupling

Abstract

The utility model provides a coupler which comprises a first connecting disc, and the center of the first connecting disc is fixedly connected with a driving shaft. The center of the second connecting disc is fixedly connected with a driven shaft; more than three guide columns are vertically, fixedly and uniformly arranged on the first connecting disc in a circumferential array manner; guide column through holes corresponding to the guide columns are formed in the second connecting disc, damping sleeves are fixedly installed in the guide column through holes, and the guide columns slide left and right in the damping sleeves. According to the utility model, the guide pillar is arranged, so that the driven shaft axially moves relative to the coupling; the shock absorption sleeve is arranged in the guide pillar through hole for buffering, collision between the guide pillar and steel of the guide pillar through hole during starting of the driving shaft is avoided, heat treatment for improving the performance of the guide pillar is easily carried out on the guide pillar, and the service life of the guide pillar is more than two times that of an existing design; meanwhile, the guide pillar or the damping sleeve is easy to replace after being damaged, and the replacement cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a connecting part in mechanical equipment, in particular to a shaft coupling. BACKGROUND

[0002] In mechanical equipment, the shaft coupling is used to connect the driving shaft and the driven shaft to rotate together to transmit torque. In some equipment, the driving shaft or the driven shaft needs to be axially displaced relative to the shaft coupling, such as the grain germ and husk separator with a circular table rotor disclosed in the patent No. CN204583266U. The driven shaft (i.e. the rotating shaft) needs to be axially displaced relative to the shaft coupling to adjust the gap between the rotor and the inner wall of the barrel. The shaft coupling used in this separator is a half coupling disclosed in the patent No. CN204583266U. Since there is a gap between the half coupling and the rotating shaft, and the rotating shaft is relatively long and the keyway is on the inner side of the half coupling, it is difficult to perform heat treatment on both of them, so heat treatment is not performed. During the transmission process using this half coupling, it is found that the key teeth of the steel half coupling or the steel rotating shaft connected thereto are damaged quickly. When the key teeth of the rotating shaft are damaged, the entire rotating shaft is scrapped, and the replacement of the rotating shaft is expensive and difficult to disassemble and maintain. SUMMARY

[0003] To solve the problem of the quick damage of the key teeth of the half coupling or the end of the rotating shaft connected thereto in the background art, the utility model provides a shaft coupling. The half coupling can ensure smooth axial movement of the driving shaft or the driven shaft relative to the shaft coupling and prolong the service life of the shaft coupling and the driving shaft or the driven shaft.

[0004] The utility model provides a kind of shaft coupling, including first connecting disc, the center of the first connecting disc is fixedly connected driving shaft;Second connecting disc, the center of the second connecting disc is fixedly connected driven shaft;Three or more than three guide posts are vertically fixed and evenly arranged on the first connecting disc in circumferential array;Second connecting disc is provided with the guide post through hole corresponding with the guide post, and damping sleeve is fixedly installed in guide post through hole, and the guide post slides left and right in damping sleeve.

[0005] Preferably, the guide post and the damping sleeve are in a small gap fit.

[0006] The damping sleeve is made of polyurethane material.

[0007] Preferably, the first connecting disc and the driving shaft, the second connecting disc and the driven shaft are tightly connected.

[0008] Preferably, the second connecting disc is fixedly installed with a baffle on the left and right sides by screws to fix the damping sleeve, or the damping sleeve is adhesively fixed in the guide post through hole.

[0009] Preferably, the right end of the guide post is a wedge-shaped root, and the first connecting plate is provided with a wedge-shaped through hole that matches the root. The right end of the wedge-shaped root is a stud. The guide post, root, and stud are made of the same material. The guide post is fixedly connected to the first connecting plate by screwing the stud onto the fastening bolt, so as to fix the guide post more firmly and facilitate the replacement of the guide post.

[0010] The coupling described in this utility model has a fixed connection between the first connecting disc and the drive shaft, and between the second connecting disc and the driven shaft, making this connection less prone to damage. This utility model achieves axial movement of the driven shaft relative to the coupling by setting a guide post. A shock-absorbing sleeve is installed inside the guide post's through hole as a buffer, preventing collision between the guide post and the steel material of the guide post's through hole during drive shaft startup. Furthermore, the guide post is easy to heat-treat to improve its performance, resulting in a service life more than twice that of existing designs. Simultaneously, the guide post or shock-absorbing sleeve is easy to replace when damaged, and the replacement cost is low. Technical solutions with the same inventive concept as this utility model, such as placing the guide post on the second connecting disc, also fall within the protection scope of this utility model. Attached Figure Description

[0011] Figure 1 This is a front view of an embodiment of the present utility model;

[0012] Figure 2 for Figure 1 Sectional view along axis AA;

[0013] Figure 3 for Figure 1 The left view. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0015] like Figures 1-3 As shown, this utility model provides a coupling, including a first connecting plate 1, the center of which is keyed to a drive shaft; and a second connecting plate 2, the center of which is keyed to a driven shaft. Eight guide posts 3 are evenly and vertically arranged in a circumferential array on the first connecting plate 1. The right end of each guide post 3 is a wedge-shaped root 31. A wedge-shaped through hole that mates with the root 31 is provided on the first connecting plate 1. The right end of the wedge-shaped root 31 is a stud 32. The guide posts 3, root 31, and stud 32 are all made of a single piece of steel. The guide posts 3 are fixedly connected to the first connecting plate 1 by screwing the stud 32 with a fastening bolt 6. The second connecting plate has guide post through holes corresponding to the guide posts 3. A shock-absorbing sleeve 4 made of polyurethane material is installed inside the guide post through hole. The shock-absorbing sleeve 4 is fixed inside the guide post through hole by using screws to install baffles 5 on the left and right sides of the second connecting plate 2. The guide posts 3 and the shock-absorbing sleeve 4 have a small clearance fit, and the guide posts 3 can slide left and right within the shock-absorbing sleeve 4.

Claims

1. A coupling comprising a first connecting disc, the center of which is fixedly connected to a drive shaft; and a second connecting disc, the center of which is fixedly connected to a driven shaft; characterized in that... The first connecting plate has three or more guide posts arranged vertically and evenly in a circular array; the second connecting plate has guide post through holes corresponding to the guide posts, and a shock-absorbing sleeve is fixedly installed in the guide post through holes, and the guide posts slide left and right in the shock-absorbing sleeve.

2. The coupling according to claim 1, characterized in that: The guide post and the shock-absorbing sleeve are fitted with a small clearance.

3. A coupling according to claim 1, characterized in that: The shock-absorbing sleeve is made of polyurethane material.

4. A coupling according to claim 1, characterized in that: The first connecting plate is connected to the drive shaft and the second connecting plate to the driven shaft by a key.

5. A coupling according to claim 1, characterized in that... The second connecting plate has baffles fixed to its left and right sides with screws to fix the shock-absorbing sleeve; or the shock-absorbing sleeve can be glued and fixed in the through hole of the guide post.

6. A coupling according to claim 1, characterized in that: The right end of the guide post is a wedge-shaped root. The first connecting plate is provided with a wedge-shaped through hole that matches the root. The right end of the wedge-shaped root is a stud. The guide post, root, and stud are made of the same material. The guide post is fixedly connected to the first connecting plate by screwing the stud onto the fastening bolt.

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