Elastic coupling

Abstract

The elastic coupling comprises a left half coupling body, a right half coupling body and a gear sleeve, equally-divided and evenly-distributed grooves are formed in the gear sleeve, the left half coupling body and the right half coupling body are opposite in the axial end face, and outer teeth of the left half coupling body and outer teeth of the right half coupling body can be installed in the grooves of the gear sleeve at the same time. And a wedge-shaped rubber block matched with the groove in shape is arranged in the groove between the outer teeth of the left half coupling and the outer teeth of the right half coupling. By means of the elasticity of the wedge-shaped rubber blocks, coaxiality errors frequently occurring in installation of the left half coupler and the right half coupler can be offset, installation of the left half coupler and the right half coupler becomes simple and easy, meanwhile, a middle connecting piece of the left half coupler and the right half coupler is convenient to manufacture, the elastic coupler is suitable for bearing heavy-load operation, and the use reliability of the coupler can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to an elastic coupling capable of withstanding heavy load operation. Background Art

[0002] A coupling, also known as a shaft coupling, is a mechanical component that is often used to firmly connect the driving shaft and the driven shaft in different mechanisms to rotate together and transmit motion and torque. Sometimes it is also used to connect the shaft to other parts. An elastic coupling, due to containing elastic elements, not only has the ability to compensate for the relative displacement of two axes, but also has buffering and vibration reduction effects. Currently, commonly used elastic couplings include diaphragm couplings, plum blossom couplings, nylon internal tooth couplings, roller chain couplings, tire couplings, and elastic pin couplings, etc. Among them, for the diaphragm coupling, since the diaphragm has a weak torque-bearing capacity, it is not very suitable for situations with large torque changes. The biggest drawback of the plum blossom coupling is that due to the limitation of the coupling's own structure, the tooth shape is thin, and it is prone to deformation or damage under large torque values. In addition, the manufacturing difficulty is high, the manufacturing cost is large, the structure is complex, and it is more troublesome for installation and maintenance. For the nylon internal tooth coupling, due to the limitation of the nylon material and the size of its own tooth shape, especially when the equipment starts, its anti-impact ability is significantly insufficient. In addition, the tooth shape processing is relatively cumbersome and the processing cost is high. The disadvantage of the roller chain coupling is that during the transmission process of the chain coupling, the friction between the chain and the gear will generate relatively large noise, has high requirements for lubrication, and is not convenient for maintenance. In addition, since it is composed of multiple chains and sprockets, the space occupied after assembly is relatively large. The disadvantage of the tire coupling is that its load-bearing capacity is not high and its external dimensions are relatively large. In addition, when the tire coupling runs at high speed, the outer edge of the tire expands outward due to the action of centrifugal force, which will further increase the additional axial force and cause trouble for installing the coupling. The elastic pins in the elastic pin coupling are easily affected by heat aging, resulting in reduced elasticity, thus affecting its torque transmission ability, and the pin shearing situation will occur. In addition, under the actual working conditions of the elastic pin coupling in a wet site, eroded by acid and alkaline gases, and high-speed and heavy-load operation, the pin shearing situation occurs frequently, seriously restricting the smooth progress of production. Summary of the Invention

[0003] In order to solve the problems existing in currently commonly used elastic couplings, the present utility model provides an elastic coupling, which includes a left half coupling, a right half coupling and a tooth sleeve. The special feature lies in that the right end face of the left half coupling is provided with evenly distributed external teeth of the left half coupling, the left end face of the right half coupling is provided with evenly distributed external teeth of the right half coupling, the tooth sleeve is internally provided with equally divided and evenly distributed grooves, the number of the grooves is greater than the sum of the number of the external teeth of the left half coupling and the external teeth of the right half coupling, the left half coupling and the right half coupling are opposite to each other along the axial end face, and the external teeth of the left half coupling and the external teeth of the right half coupling can be simultaneously inserted into the grooves of the tooth sleeve. A wedge-shaped rubber block matching the shape of the groove is arranged in the groove between the external teeth of the left half coupling and the external teeth of the right half coupling.

[0004] Further, the number of the external teeth of the left half coupling is the same as that of the external teeth of the right half coupling.

[0005] Further, the number of the external teeth of the left half coupling is three, the number of the external teeth of the right half coupling is three, and the number of the grooves in the tooth sleeve is twelve.

[0006] Further, a left baffle is arranged at the left end of the tooth sleeve, and the left baffle is fixed to the tooth sleeve by screws.

[0007] Further, a right baffle is arranged at the right end of the tooth sleeve, and the right baffle is fixed to the tooth sleeve by screws. Left and right baffles are respectively installed on both sides of the tooth sleeve and fixed to the tooth sleeve by screws, which can effectively prevent the wedge-shaped rubber block from moving axially.

[0008] The elastic coupling device in the present utility model has a simpler and more compact structure, and the left and right half couplings and the intermediate connecting member, i.e., the wedge-shaped rubber block, are also more convenient to manufacture. At the same time, the elasticity of the wedge-shaped rubber block can offset the coaxiality error that often occurs in the installation of the left and right half couplings, making the installation of the left and right half couplings simple and easy, and can be installed independently, which is convenient for operation. In addition, the elastic coupling of the present utility model can be applied to the working conditions of bearing heavy loads, greatly improving the reliability of the use of the elastic coupling. Description of the Drawings

[0009] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0010] Figure 1 It is a schematic exploded view of the elastic coupling of the present utility model;

[0011] Figure 2 It is a schematic structural view of the elastic coupling of the present utility model.

[0012] In the figure: 1. Left half coupling; 101. External teeth of the left half coupling; 2. Right half coupling; 201. External teeth of the right half coupling; 3. Gear sleeve; 301. Groove; 4. Wedge-shaped rubber block; 5. Left baffle; 6. Right baffle. Detailed implementation mode

[0013] To deepen the understanding of the present utility model, the present utility model will be further described in detail below in conjunction with embodiments and drawings.

[0014] As Figures 1 to 2 Shown in the figure, the structure of the elastic coupling in this embodiment includes a left half coupling, a right half coupling and a gear sleeve. The right end face of the left half coupling is provided with evenly distributed external teeth of the left half coupling. The left end face of the right half coupling is provided with evenly distributed external teeth of the right half coupling. The gear sleeve is internally provided with equally divided and evenly distributed grooves. The number of the grooves is greater than the sum of the number of the external teeth of the left half coupling and the external teeth of the right half coupling. The left half coupling and the right half coupling are axially end to end. The external teeth of the left half coupling and the external teeth of the right half coupling can be simultaneously inserted into the grooves of the gear sleeve. A wedge-shaped rubber block matching the shape of the groove is arranged in the groove between the external teeth of the left half coupling and the external teeth of the right half coupling.

[0015] The number of the external teeth of the left half coupling is the same as that of the external teeth of the right half coupling.

[0016] The number of the external teeth of the left half coupling is three, the number of the external teeth of the right half coupling is three, and the number of the grooves in the gear sleeve is twelve.

[0017] A left baffle is arranged at the left end of the gear sleeve, and the left baffle and the gear sleeve are fixed by screws.

[0018] A right baffle is arranged at the right end of the gear sleeve, and the right baffle and the gear sleeve are fixed by screws.

[0019] The specific use method of the elastic coupling in this embodiment is that the three external teeth of the left and right half couplings are axially end to end and inserted into the grooves of the gear sleeve. The remaining six grooves of the gear sleeve are filled with six wedge-shaped rubber blocks. Left and right baffles are respectively installed on both sides of the gear sleeve, which is convenient to be fixed on the gear sleeve with screws to prevent the wedge-shaped rubber blocks from axially moving. Through the elasticity of the wedge-shaped rubber blocks, the coaxiality error often occurring in the installation of the left and right half couplings can be offset, making the installation of the left and right half couplings simple and easy. At the same time, the intermediate connecting piece between the left and right half couplings is also convenient to manufacture. It is applicable to the elastic coupling for heavy load operation and can improve the reliability of the use of the coupling.

[0020] The above are only specific embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An elastic coupling, comprising a left half coupling, a right half coupling and a gear sleeve, characterized in that, The right end face of the left half coupling is provided with evenly distributed external teeth of the left half coupling. The left end face of the right half coupling is provided with evenly distributed external teeth of the right half coupling. The tooth sleeve is provided with equally divided and evenly distributed grooves, and the number of the grooves is greater than the sum of the numbers of the external teeth of the left half coupling and the right half coupling. The left half coupling and the right half coupling are axially end-to-end, and the external teeth of the left half coupling and the external teeth of the right half coupling can be simultaneously inserted into the grooves of the tooth sleeve. A wedge-shaped rubber block matching the shape of the groove is arranged in the groove between the external teeth of the left half coupling and the external teeth of the right half coupling.

2. The elastic coupling according to claim 1, wherein The numbers of the external teeth of the left half coupling and the right half coupling are the same.

3. The elastic coupling according to claim 1, characterized in that, The number of the external teeth of the left half coupling is three, the number of the external teeth of the right half coupling is three, and the number of the grooves in the tooth sleeve is twelve.

4. The elastic coupling according to claim 1, characterized in that, The left end of the tooth sleeve is provided with a left baffle, and the left baffle is fixed to the tooth sleeve by screws.

5. The elastic coupling according to claim 1, characterized in that, The right end of the tooth sleeve is provided with a right baffle, and the right baffle is fixed to the tooth sleeve by screws.

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