Square elastomer coupling

Abstract

The utility model relates to the technical field of mechanical parts, in particular to a square elastomer coupling which is provided with two half couplings with the same structure, the inner side of each half coupling is uniformly provided with clamping jaws, the clamping jaws of the two half couplings are spliced in a staggered mode to form a square clamping seat, and the square clamping seat is connected with the two half couplings. Each square clamping base is internally provided with one elastic body, the elastic bodies are square, compared with cylindrical elastic bodies, the contact area between the square elastic bodies and the half couplings is increased, the extrusion stress borne by the elastic bodies is reduced, the service life of the elastic bodies is prolonged, and therefore the replacement frequency of the elastic bodies is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical components, in particular to a square elastic coupling. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part. They rotate together during the transmission of motion and power and do not disengage under normal circumstances. It is sometimes also used as a safety device to prevent the connected mechanical parts from being subjected to excessive loads, thus playing the role of overload protection.

[0003] Couplings are mechanical components mainly used to firmly connect the driving shaft and the driven shaft in different mechanisms so that they rotate together and transmit motion and torque. They are sometimes also used to connect shafts with other parts, such as gears and pulleys. They are often composed of two halves, which are connected by keys or tight fits, fastened to the two shaft ends, and then connected in some way.

[0004] With the development of modern engineering, higher and higher requirements are placed on couplings, especially in mining and steel-related projects. Due to the harsh environment, low and high temperatures can easily affect the couplings, requiring frequent replacement of the couplings, and the disassembly of the couplings is very inconvenient, which leads to high maintenance costs and complicated operations.

[0005] In order to solve the above technical problems, the technical solution of the Chinese utility model patent announcement with patent application number CN201921858183.5 is: a separate elastic coupling, comprising two separated coupling seats for connecting the shaft body, and a comprehensive offset mechanism is provided between the two coupling seats, and the comprehensive offset mechanism includes two annular claws respectively fixed to the coupling seats in one-to-one correspondence, and the two annular claws are staggered and spliced ​​to form an elastomer carrier, and a plurality of circumferentially evenly distributed radial holes and grooves are formed on the elastomer carrier, and each of the radial holes and grooves is provided with a limited and fixed elastomer. The coupling provided in the utility model is simple to install and disassemble, the maintenance and replacement of the elastomer is convenient, the operation is convenient and efficient, and it can also have high temperature resistance and low temperature resistance characteristics by selecting elastomers of different materials.

[0006] However, the above-mentioned prior art has the following technical problems: in the separate elastic coupling provided in the above-mentioned scheme, the shape of the elastomer is a cylinder or a conical cylinder, and the contact area between the elastomer of this shape and the half-coupling is small, which will cause the elastomer to be subjected to higher extrusion stress, shorten the service life of the elastomer, and increase the replacement frequency of the elastomer. Utility Model Content

[0007] In view of this, it is necessary to provide a square elastic coupling that can increase the service life of the elastic body.

[0008] A square elastomeric coupling comprises two half-couplings of identical structure, a fixing assembly and at least four elastomers of identical structure, at least two claws are evenly arranged on the inner side of each half-coupling, the inner sides of the two half-couplings are directly connected, and the claws of the two half-couplings are staggered and spliced ​​to form at least four square sockets of identical size, each square socket is equipped with an elastomer, the fixing assembly is installed on the circular ring formed by the elastomer and the claws to limit the elastomer, and the shape of the elastomer is square to increase the contact area between the elastomer and the half-coupling.

[0009] Preferably, each half-coupling is also provided with at least two detachable fixing bolts for limiting the fixing assembly.

[0010] Preferably, the fixing component is an annular belt with a certain elasticity, and the width of the annular belt is greater than or equal to the thickness of the elastomer.

[0011] Preferably, a disassembly hole is provided at one end of the elastomer facing the fixing assembly to facilitate disassembly of the elastomer.

[0012] Preferably, a disassembly groove is provided at one end of the elastic body facing the fixing assembly, and a disassembly ring is installed in the disassembly groove to facilitate the disassembly of the elastic body.

[0013] Preferably, two first limiting protrusions of the same size are symmetrically provided at one end of the elastic body away from the fixing assembly, and a second limiting protrusion is correspondingly provided on the clamping claw for fixing the elastic body.

[0014] In the above-mentioned square elastomer coupling, two half-couplings of the same structure are provided, and claws are evenly provided on the inner side of each half-coupling. The claws of the two half-couplings are staggered and spliced ​​to form a square socket. Each square socket is equipped with an elastomer, which is square in shape. Compared with the cylindrical elastomer, the contact area between the square elastomer and the half-coupling is increased, and the extrusion stress borne by the elastomer is reduced, which increases the service life of the elastomer, thereby reducing the replacement frequency of the elastomer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an oblique bird's-eye view of the square elastic coupling of the present application when it is disassembled.

[0016] Figure 2 It is an oblique bird's-eye view of the square elastic coupling of the present application when connected.

[0017] Figure 3 It is an oblique top view of the half coupling of the present application.

[0018] Figure 4 This is an oblique top-down view from another perspective of the half coupling of the present application.

[0019] Figure 5 It is a side view of the half coupling of the present application.

[0020] Figure 6 It is an oblique top view of the elastic body of the present application.

[0021] Figure 7 It is a bottom view of the elastic body of the present application.

[0022] Figure 8 It is a front view of the elastic body of the present application.

[0023] Fig. 9 It is an oblique top view of the elastic body of the present application when equipped with a disassembly ring.

[0024] In the figure: a square elastic coupling 10, a half coupling 20, a claw 21, a second limiting protrusion 22, a fixing bolt 23, a fixing assembly 30, an elastic body 40, a disassembly hole 41, a first limiting protrusion 42, a disassembly groove 43, and a disassembly ring 44. DETAILED DESCRIPTION

[0025] The technical scheme and technical effects of the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.

[0026] A square elastic coupling 10 comprises two half couplings 20 of the same structure, a fixing assembly 30 and at least four elastic bodies 40 of the same structure, at least two claws 21 are evenly arranged on the inner side of each half coupling 20, the inner sides of the two half couplings 20 are directly connected, and the claws 21 of the two half couplings 20 are staggered and spliced ​​to form at least four square holders of the same size, the size of the square holder is slightly larger than the size of the elastic body 40, so as to ensure that the elastic body 40 can be installed in the square holder; each square An elastomer 40 is installed in the socket for transmitting torque; the fixing component 30 is installed on the circular ring formed by the elastomer 40 and the claw 21 to limit the elastomer 40 and prevent the elastomer 40 from popping out of the square socket; the elastomer 40 is square in shape, and compared with the cylindrical elastomer 40, the contact area between the elastomer 40 and the half coupling 20 can be greatly increased, thereby reducing the extrusion stress on the elastomer 40, thereby increasing the service life of the elastomer 40 and reducing the replacement frequency of the elastomer 40.

[0027] Furthermore, each half-coupling 20 is also provided with at least two detachable fixing bolts 23 for limiting the fixing assembly 30 to prevent the fixing assembly 30 from shaking back and forth, causing the fixing assembly 30 to fall off the square elastomer coupling 10, making it impossible for the fixing assembly 30 to limit the elastomer 40.

[0028] Furthermore, the fixing component 30 is a ring belt with a certain elasticity, for example, a nylon ring, and the width of the ring belt is greater than or equal to the thickness of the elastomer 40 to ensure that the elastomer 40 can be fixed to the square holder.

[0029] In one embodiment, a disassembly hole 41 is provided at one end of the elastic body 40 facing the fixing assembly 30 , and a thread is provided in the disassembly hole 41 to facilitate disassembly of the elastic body 40 .

[0030] In one embodiment, a disassembly groove 43 is opened at one end of the elastomer 40 facing the fixing assembly 30, and a disassembly ring is installed in the disassembly groove 43. When replacing the elastomer, the disassembly ring 44 is first pulled up from the disassembly groove 43, and then the elastomer 40 is pulled out of the square socket by pulling the disassembly ring 44.

[0031] In this embodiment, two first limiting protrusions 42 of the same size are symmetrically provided at one end of the elastomer 40 away from the fixing assembly 30, and a second limiting protrusion 22 is correspondingly provided on the claw 21 for fixing the elastomer 40 so that the elastomer 40 can be fixed in the square socket.

[0032] Example 1 compares the extrusion stresses of a cylindrical elastic body and the elastic body 40 of the present invention.

[0033] The formula for the extrusion stress of a cylindrical elastic body is: 圆柱 =Tc / Zdlr;

[0034] In the above formula, Tc is the output torque of the reducer, which is taken as 9550Piη / n here, where P is the motor power, i is the speed ratio of the reducer, n is the motor speed, and η is the transmission efficiency; Z is the number of elastic bodies, which is taken as 6 here; d is the diameter of the cylindrical elastic body, which is taken as 60 here; l is the length of the cylindrical elastic body, which is taken as 70 here; r is the radius of the neutral layer of the cylindrical elastic body, which is taken as 182.5 here.

[0035] The extrusion stress formula of the elastic body 40 of the utility model is: σb 矩形 =Tc / Zblr;

[0036] In the above formula, Tc is the output torque of the reducer, which is taken as 9550Piη / n here, where P is the motor power, i is the speed ratio of the reducer, n is the motor speed, and η is the transmission efficiency; Z is the number of elastic bodies, which is taken as 6 here; b is the width of the square elastic body, which is taken as 70 here; l is the length of the square elastic body, which is taken as 85 here; r is the radius of the neutral layer of the square elastic body, which is taken as 164.5 here.

[0037] By calculation, we can get that σb 矩形 / σb 圆柱=0.78, it can be concluded that in a similar design, the elastic body 40 of the utility model is only subjected to 78% of the extrusion stress borne by the cylindrical elastic body.

[0038] Example 2 compares the transmitted torque of a cylindrical elastic body and the elastic body 40 of the present invention.

[0039] The transmission torque of the elastic body is the anti-extrusion ability of the elastic body, and the anti-extrusion ability of the elastic body is only proportional to the square of the cross-sectional area of ​​the elastic body;

[0040] The size of the elastic body 40 of the utility model is 70*80*85, and its cross-sectional area is 5438, while the cross-sectional area of ​​a cylinder with the same size is 3846, and the cross-sectional area ratio is 1.4, so that the ability to transmit torque is improved by 1.96 times.

[0041] When the square elastomeric coupling 10 is used on a crusher, first fix one half coupling 20 to the power unit of the crusher, then install the other half coupling 20, and then embed the elastomer 40 into the square holder formed by the claws 21, and then install the fixing assembly 30 on top of the square holder to fix the elastomer 40, and then install the fixing bolts 23 to limit the fixing assembly 30, and finally connect the crushing shaft assembly of the crusher to the other half coupling 20 to complete the installation.

[0042] When replacing the elastomer 40, first remove the fixing bolt 23, then push aside the fixing assembly 30, and then screw the bolt into the disassembly hole 41, then pull the elastomer 40 out of the square holder, and finally install the new elastomer 40 into the square holder, and reset the fixing assembly 30 to complete the replacement of the elastomer 40.

[0043] The utility model replaces the cylindrical elastomer 40 with a rectangular elastomer 40, so that the contact area between the elastomer 40 and the half coupling 20 can be larger, the extrusion stress is lower, the extrusion strength is higher, the transmitted torque is greater, and the service life is longer. In addition, by providing a fixing component 30, the replacement of the elastomer 40 is very simple.

[0044] The utility model can be used not only on crushers, but also on mining machinery such as scrapers and transfer machines, and has achieved good results.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A square elastic coupling, characterized in that: It comprises two half-couplings of the same structure, a fixing assembly and at least four elastomers of the same structure. At least two claws are evenly arranged on the inner side of each half-coupling. The inner sides of the two half-couplings are directly connected, and the claws of the two half-couplings are staggered and spliced ​​to form at least four square sockets of the same size. An elastomer is installed in each square socket. The fixing assembly is installed on the ring formed by the elastomer and the claws to limit the elastomer. The shape of the elastomer is rectangular to increase the contact area between the elastomer and the half-coupling.

2. The square elastic coupling according to claim 1, characterized in that: Each half-coupling is also provided with at least two detachable fixing bolts for limiting the fixing assembly.

3. The square elastic coupling according to claim 1, characterized in that: The fixing component is an annular belt with a certain elasticity, and the width of the annular belt is greater than or equal to the thickness of the elastic body.

4. The square elastic coupling according to claim 1, characterized in that: A disassembly hole is provided at one end of the elastic body facing the fixing assembly to facilitate disassembly of the elastic body.

5. The square elastic coupling according to claim 1, characterized in that: A disassembly groove is arranged at one end of the elastic body facing the fixing assembly, and a disassembly ring is arranged in the disassembly groove to facilitate disassembly of the elastic body.

6. The square elastic coupling according to claim 1, characterized in that: Two first limiting protrusions of the same size are symmetrically provided at one end of the elastic body away from the fixing assembly, and a second limiting protrusion is correspondingly provided on the claw for fixing the elastic body.

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