CN220706257U

CN220706257U - Elastic coupling with high bearing strength

Info

Publication number: CN220706257U
Application number: CN202322531096.1U
Authority: CN
Inventors: 王炳强; 汪继宝; 艾超
Original assignee: Zhenjiang Jinding Heavy Industry Co ltd
Current assignee: Zhenjiang Jinding Heavy Industry Co ltd
Priority date: 2023-09-18
Filing date: 2023-09-18
Publication date: 2024-04-02
Anticipated expiration: 2033-09-18

Abstract

The utility model discloses an elastic coupling with high bearing strength, which comprises a first coupling component and a second coupling component, wherein the outer side wall of the first coupling component is detachably connected with one end of a first plug-in component, the other end of the first plug-in component is detachably connected with a damping component, and the outer side wall of the first plug-in component is in clamping connection with a first limiting component; the split type elastic coupling has the advantages that the split type elastic coupling is realized, the transverse deformation capacity of the damping component is limited by detachably connecting the damping component with the first plug component and the second plug component respectively, the connecting stability is realized, the first plug component and the second plug component are difficult to displace when a single nut is accidentally loosened through the first limiting component and the second limiting component, the bearing capacity and the using effect of the elastic coupling are guaranteed, and the split type elastic coupling is suitable for being widely popularized and used.

Description

Elastic coupling with high bearing strength

Technical Field

The utility model belongs to the technical field of couplings, and particularly relates to an elastic coupling with high bearing strength.

Background

The elastic coupling is a coupling capable of compensating axial displacement and radial displacement between the connecting shafts, while the rigid coupling is a coupling incapable of connecting axial displacement and radial displacement between the shafts; the elastic coupling is usually composed of two metal parts, one of which is an elastic element and the other of which is a fixed element. The elastic element can be made of rubber, a spring and other materials, and the shape of the elastic element can be rectangular, triangular, trapezoidal and other forms. The fixing element is usually made of metal for fixing the elastic element and transmitting power or torque.

At present, the elastic coupling is widely cited in working conditions requiring axial displacement and radial position supplementation due to good performance, the existing elastic coupling is generally poor in bearing strength, so that the elastic coupling is invalid or damaged due to overlarge bearing in the use process, and meanwhile, the elastic coupling is easy to loose after long-time use, so that the bearing capacity of the elastic coupling is further reduced, and certain potential safety hazards exist; for this purpose, it is necessary to design an elastic coupling with high bearing strength.

Disclosure of Invention

Aiming at the situation, in order to solve the problem that the existing elastic coupling is invalid or damaged due to overlarge bearing caused by poor bearing strength in the use process, and the elastic coupling is easy to loose after long-time use, the bearing capacity of the elastic coupling is further reduced, and the problem of certain potential safety hazards is also solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the elastic coupler with high bearing strength comprises a first coupling component and a second coupling component, wherein the outer side wall of the first coupling component is detachably connected with one end of a first plug-in component, the other end of the first plug-in component is detachably connected with a damping component, the outer side wall of the first plug-in component is in clamping connection with a first limit component, the outer side wall of the damping component is detachably connected with one end of a second plug-in component, the other end of the second plug-in component is detachably connected with a second coupling component, the outer side wall of the second plug-in component is in clamping connection with a second limit component, and the damping component is positioned in the middle of the first plug-in component and the second plug-in component; the first coupling component is used for connecting the output shaft, the first plug-in component is used for connecting the first coupling component and the damping component, the number of the first plug-in components is multiple, and the first limiting component is used for limiting the positions among the first plug-in components; the second coupling assembly is used for connecting the rotating shaft, the second plug-in assembly is used for connecting the second coupling assembly and the damping assembly, the number of the second plug-in assemblies is multiple, and the second limiting assembly is used for limiting the positions among the second plug-in assemblies; the damping component is used for damping vibration between the first plug component and the second plug component.

The elastic coupling with high bearing strength comprises a coupling plate, wherein a coupling hole is formed in the outer side wall of the coupling plate, one end of a threaded hole is formed in the inner side wall of the coupling hole, and the other end of the threaded hole extends to the outer surface of the coupling plate; the connecting plate outer side wall is provided with a jack, the inner side wall of the jack is provided with a clamping groove, and the inner side wall of the clamping groove is provided with a protruding block.

The elastic coupling with high bearing strength comprises a supporting rod, wherein one end of the supporting rod is provided with an inserting rod, the other end of the supporting rod is fixedly connected with an end block, a threaded line is arranged on the outer side wall of the inserting rod, a connecting groove is arranged on the outer wall of one side, far away from the supporting rod, of the end block, a nut is connected with the inner side wall of the threaded line in a threaded manner, and a side hole is arranged on the inner side wall of the connecting groove; tooth grooves are formed in the outer side walls of the support rods, the inner side walls of the tooth grooves are wedged with the outer side walls of the convex blocks, and the outer side walls of the support rods are connected with the inner side walls of the clamping grooves in a clamping mode.

In the elastic coupling with high bearing strength, the first limiting component comprises a limiting plate, and a limiting rod is arranged on the outer side wall of the limiting plate; the first plug-in assembly further comprises a limiting hole, and the limiting hole is formed in the outer side wall of the end block; the outer side wall of the limiting rod and the inner side wall of the limiting hole are mutually wedged.

The elastic coupling with high bearing strength comprises the elastic ring, wherein the outer side wall of the elastic ring is provided with the connecting block, and the outer side wall of the connecting block is provided with the connecting hole; the outer side wall of the connecting block is wedged with the inner side wall of the connecting groove, the aperture of the connecting hole is the same as that of the side hole, and the connecting hole and the side hole are detachably connected by adopting an external fastener.

According to the elastic coupling with high bearing strength, the number of the limiting holes is two, the number of the end blocks is multiple, and the adjacent end blocks are connected through the first limiting assembly.

In the elastic coupling with high bearing strength, the elastic ring is made of flexible synthetic rubber material, and the limiting plate is made of elastic steel material.

The elastic coupling with high bearing strength is characterized in that the connecting structure between the damping component and the first plug component is the same as the connecting structure between the damping component and the second plug component, the connecting structure between the second plug component and the second plug component is the same as the connecting structure between the first plug component and the first coupling component, and the connecting structure between the second plug component and the second limiting component is the same as the connecting structure between the first plug component and the first limiting component.

The elastic coupler with high bearing strength is characterized in that the connecting structure between the second coupling component and the rotating shaft is the same as the connecting structure between the first coupling component and the output shaft, and the shaft diameter of the output shaft is larger than that of the rotating shaft.

Compared with the prior art, the utility model has the beneficial effects that:

(1) Firstly, the limiting plate is moved, the limiting rod is inserted along the limiting hole so as to carry out clamping connection between the limiting rod and the end block, then the first limiting component and the first plug-in component are connected, meanwhile, the first plug-in components are connected under the action of the first limiting components, the second limiting component and the second plug-in component are detachably connected, then the elastic ring is moved and placed at the middle position of the first plug-in component and the second plug-in component, the connecting block is inserted along the inner side wall of the connecting groove so as to carry out primary clamping connection between the connecting block and the end block, then the external fastener is rotated along the side hole and the connecting hole so as to carry out detachable connection between the connecting block and the end block, then the shock-absorbing component and the first plug-in component are detachably connected, the shock-absorbing component and the second plug-in component are detachably connected, the combined body of the first limiting component and the first plug-in component is moved and the plug-in component is inserted along the jack so as to attach the outer side wall of the supporting rod to the clamping groove, the inner side wall of the connecting groove is attached to the outer side wall of the connecting groove so as to attach the connecting nut, the nut can be connected with the outer surface of the connecting shaft along the connecting hole, the threaded nut can be connected with the threaded nut can be detached, the nut can be connected with the output shaft along the threaded connection between the threaded connection nut and the threaded connection nut can be detached, the same reason has just also carried out the dismantlement with between second coupling assembly and the axis of rotation and has been connected, the effectual function that has realized this elastic coupling has split type elastic coupling, and through carrying out the dismantlement with between damper and first grafting subassembly and the second grafting subassembly respectively and being connected makes damper horizontal deformability receive the restriction, the bearing capacity of elastic coupling has been improved, can avoid elastic coupling to a certain extent because too big bearing and inefficacy or damage in the use like this, each subassembly dismouting of this elastic coupling is convenient simultaneously, and only need change damper just can continue to use after long-time use, the cost performance of this elastic coupling has been improved, this elastic coupling simple structure and suitability are stronger.

(2) The first spacing subassembly that is provided with, can connect between a plurality of first grafting subassemblies, the rethread is provided with the spacing subassembly of second and can connect between a plurality of second grafting subassemblies, the effectual elastic coupling that has realized has the function of connecting stably, and first grafting subassembly and second grafting subassembly are difficult to take place the displacement when making single nut take place unexpected not hard up through the spacing subassembly of first spacing subassembly that is provided with and the spacing subassembly of second, the bearing capacity and the result of use of elastic coupling have been ensured, the potential safety hazard that has had has been eliminated, this elastic coupling simple structure and practicality are stronger.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a shock absorbing assembly according to the present utility model;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present utility model;

FIG. 4 is a schematic view of a first coupling assembly of the present utility model;

in the figure: 1. a first coupling assembly; 101. a connecting plate; 102. a coupling hole; 103. a jack; 104. a clamping groove; 105. a bump; 106. a threaded hole; 2. a first plug assembly; 201. a support rod; 202. a nut; 203. an end block; 204. a connecting groove; 205. a side hole; 206. a limiting hole; 207. a rod; 208. a thread line; 209. tooth slots; 3. a first limit assembly; 301. a limiting plate; 302. a limit rod; 4. a shock absorbing assembly; 401. an elastic ring; 402. a connecting block; 403. a connection hole; 5. a second plug assembly; 6. the second limiting component; 7. a second coupling assembly.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

1-4, the elastic coupling with high bearing strength comprises a first coupling component 1 and a second coupling component 7, wherein the outer side wall of the first coupling component 1 is detachably connected with one end of a first plug-in component 2, the other end of the first plug-in component 2 is detachably connected with a damping component 4, the outer side wall of the first plug-in component 2 is in clamping connection with a first limit component 3, the outer side wall of the damping component 4 is detachably connected with one end of a second plug-in component 5, the other end of the second plug-in component 5 is detachably connected with a second coupling component 7, the outer side wall of the second plug-in component 5 is in clamping connection with a second limit component 6, and the damping component 4 is positioned in the middle position of the first plug-in component 2 and the second plug-in component 5; the first coupling component 1 is used for connecting an output shaft, the first plug-in component 2 is used for connecting the first coupling component 1 with the shock absorption component 4, the number of the first plug-in components 2 is multiple, and the first limiting component 3 is used for limiting the positions among the first plug-in components 2; the second coupling component 7 is used for connecting a rotating shaft, the second plug-in component 5 is used for connecting the second coupling component 7 and the shock absorption component 4, the number of the second plug-in components 5 is multiple, and the second limiting component 6 is used for limiting the positions among the second plug-in components 5; the damping assembly 4 is used for damping operation between the first plug assembly 2 and the second plug assembly 5, the function of split type elastic coupling is achieved through the first coupling assembly 1, the first plug assembly 2, the damping assembly 4, the second plug assembly 5 and the second coupling assembly 7, the damping assembly 4 is detachably connected with the first plug assembly 2 and the second plug assembly 5 respectively, the transverse deformation capacity of the damping assembly 4 is limited, the bearing capacity of the elastic coupling is improved, meanwhile, the components of the elastic coupling are convenient to assemble and disassemble, and the elastic coupling can be continuously used after long-time use only by replacing the damping assembly 4.

Specifically, the first coupling assembly 1 comprises a coupling plate 101, a coupling hole 102 is formed in the outer side wall of the coupling plate 101, one end of a threaded hole 106 is formed in the inner side wall of the coupling hole 102, and the other end of the threaded hole 106 extends to the outer surface of the coupling plate 101; the jack 103 is formed in the outer side wall of the connecting plate 101, the clamping groove 104 is formed in the inner side wall of the jack 103, the protruding block 105 is arranged in the inner side wall of the clamping groove 104, the output shaft is inserted into the connecting hole 102, the output shaft is detachably connected with the connecting plate 101 along the threaded hole 106, the first connecting component 1 is detachably connected with the output shaft, and similarly, the second connecting component 7 is detachably connected with the rotating shaft.

Specifically, the first plugging assembly 2 includes a supporting rod 201, one end of the supporting rod 201 is provided with a plugging rod 207, and the other end of the supporting rod 201 is fixedly connected with an end block 203, wherein a threaded line 208 is provided on an outer side wall of the plugging rod 207, a connecting groove 204 is provided on an outer wall of one side of the end block 203 far away from the supporting rod 201, a nut 202 is screwed on an inner side wall of the threaded line 208, and a side hole 205 is provided on an inner side wall of the connecting groove 204; tooth grooves 209 are formed in the outer side walls of the supporting rods 201, the inner side walls of the tooth grooves 209 and the outer side walls of the protruding blocks 105 are mutually wedged, the outer side walls of the supporting rods 201 are connected with the inner side walls of the clamping grooves 104 in a clamping mode, the assembly of the first limiting assembly 3 and the first inserting assembly 2 is moved, the inserting rods 207 are inserted into the inserting holes 103, the outer side walls of the supporting rods 201 can be attached to the inner side walls of the clamping grooves 104, the outer surfaces of the protruding blocks 105 can be attached to the inner side walls of the tooth grooves 209, then the nuts 202 are rotated along the threaded lines 208, the nuts 202 are connected with the inserting rods 207 in a threaded mode, and then the first inserting assembly 2 and the first connecting assembly 1 are detachably connected.

Specifically, the first limiting component 3 comprises a limiting plate 301, and a limiting rod 302 is arranged on the outer side wall of the limiting plate 301; the first plugging assembly 2 further comprises a limiting hole 206, and the limiting hole 206 is formed in the outer side wall of the end block 203; the outer side wall of the limiting rod 302 and the inner side wall of the limiting hole 206 are wedged with each other, and the limiting plate 301 is moved and the limiting rod 302 is inserted along the limiting hole 206, so that the limiting rod 302 and the end block 203 can be clamped and connected, and then the first limiting assembly 3 and the first plugging assembly 2 are connected, and meanwhile, the first plugging assemblies 2 can be connected under the action of the first limiting assemblies 3.

Specifically, the shock absorbing assembly 4 includes an elastic ring 401, a connection block 402 is disposed on an outer side wall of the elastic ring 401, and a connection hole 403 is formed on an outer side wall of the connection block 402; the outer side wall of the connecting block 402 is wedged with the inner side wall of the connecting slot 204, and the aperture of the connecting hole 403 is the same as the aperture of the side hole 205, wherein the connecting hole 403 and the side hole 205 are detachably connected by adopting an external fastener, and the connecting block 402 and the end block 203 can be detachably connected by rotating the external fastener along the side hole 205 and the connecting hole 403, so that the damping component 4 and the first plugging component 2 are detachably connected.

Specifically, the number of the limiting holes 206 is two, and the number of the end blocks 203 is a plurality, wherein the adjacent end blocks 203 are connected by adopting the first limiting component 3, and the adjacent end blocks 203 can be connected by adopting the first limiting component 3 through the two limiting holes 206.

Specifically, the elastic ring 401 is made of a flexible synthetic rubber material, and the limiting plate 301 is made of an elastic steel material, so that the damper assembly 4 has a damping design function by the elastic ring 401 made of the flexible synthetic rubber material.

Specifically, the connection structure between the shock absorption component 4 and the first plug component 2 is the same as the connection structure between the shock absorption component 4 and the second plug component 5, the connection structure between the second plug component 5 and the second coupling component 7 is the same as the connection structure between the first plug component 2 and the first coupling component 1, the connection structure between the second plug component 5 and the second limiting component 6 is the same as the connection structure between the first plug component 2 and the first limiting component 3, and the second plug component 5, the second limiting component 6 and the second coupling component 7 are arranged to enable the elastic coupling to have the design function of an elastic coupling.

Specifically, the connection structure between the second coupling assembly 7 and the rotating shaft is the same as the connection structure between the first coupling assembly 1 and the output shaft, and the shaft diameter of the output shaft is larger than that of the rotating shaft, and the first coupling assembly 1 and the second coupling assembly 7 can be detachably connected with the output shaft and the rotating shaft respectively.

When in use, firstly, the limiting plate 301 is moved and the limiting rod 302 is inserted along the limiting hole 206, so that the limiting rod 302 and the end block 203 can be clamped and connected, then the first limiting assembly 3 and the first plug assembly 2 are connected, meanwhile, the first plug assemblies 2 can be connected under the action of the first limiting assemblies 3, and the second limiting assembly 6 and the second plug assembly 5 are detachably connected, the elastic coupler has the function of stable connection, the first plug assembly 2 and the second plug assembly 5 are difficult to displace when the single nut 202 is accidentally loosened through the first limiting assembly 3 and the second limiting assembly 6, the bearing capacity and the use effect of the elastic coupler are guaranteed, then the elastic ring 401 is moved and placed in the middle positions of the first plug assembly 2 and the second plug assembly 5, then the connecting block 402 is inserted along the inner side wall of the connecting groove 204 so as to perform primary clamping connection between the connecting block 402 and the end block 203, then the external fastening piece is rotated along the side hole 205 and the connecting hole 403 so as to perform detachable connection between the connecting block 402 and the end block 203, then the damping component 4 and the first plug-in component 2 are detachably connected, similarly, the damping component 4 and the second plug-in component 5 are detachably connected, then the combination of the first limiting component 3 and the first plug-in component 2 is moved and the plug-in rod 207 is inserted along the jack 103, so that the outer side wall of the supporting rod 201 is attached to the inner side wall of the clamping groove 104, so that the outer surface of the protruding block 105 is attached to the inner side wall of the tooth socket 209, then the nut 202 is rotated along the thread line 208 so as to perform threaded connection between the nut 202 and the plug-in rod 207, the first plug-in component 2 is detachably connected with the first coupling component 1, the second plug-in component 5 is detachably connected with the second coupling component 7, the output shaft is finally inserted into the coupling hole 102 and detachably connected with the coupling plate 101 along the threaded hole 106, the first coupling component 1 is detachably connected with the output shaft, the second coupling component 7 is detachably connected with the rotating shaft, the function of a split type elastic coupling is effectively realized, the transverse deformation capacity of the damping component 4 is limited by detachably connecting the damping component 4 with the first plug-in component 2 and the second plug-in component 5, the bearing capacity of the elastic coupling is improved, and meanwhile, the components of the elastic coupling are convenient to assemble and disassemble, and can be used continuously only by replacing the damping component 4 after long-time use.

The components are all common standard components or components known to those skilled in the art, and the structures and principles thereof are all known to those skilled in the art through technical manuals or through routine experimental methods.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Elastic coupling with high bearing strength, comprising a first coupling assembly (1) and a second coupling assembly (7), characterized in that: the outer side wall of the first connecting component (1) is detachably connected with one end of a first plug-in component (2), the other end of the first plug-in component (2) is detachably connected with a damping component (4), the outer side wall of the first plug-in component (2) is connected with a first limit component (3) in a clamping manner, the outer side wall of the damping component (4) is detachably connected with one end of a second plug-in component (5), the other end of the second plug-in component (5) is detachably connected with a second connecting component (7), the outer side wall of the second plug-in component (5) is connected with a second limit component (6) in a clamping manner, and the damping component (4) is positioned at the middle position of the first plug-in component (2) and the second plug-in component (5);

the first coupling component (1) is used for connecting an output shaft, the first plug-in component (2) is used for connecting the first coupling component (1) and the damping component (4), the number of the first plug-in components (2) is multiple, and the first limiting component (3) is used for limiting positions among the first plug-in components (2);

the second coupling assembly (7) is used for connecting a rotating shaft, the second plug-in assembly (5) is used for connecting the second coupling assembly (7) and the damping assembly (4), the number of the second plug-in assemblies (5) is multiple, and the second limiting assembly (6) is used for limiting positions among the second plug-in assemblies (5);

the damping component (4) is used for damping the damping operation between the first plug-in component (2) and the second plug-in component (5).

2. The high load bearing resilient coupling of claim 1, wherein: the first connecting assembly (1) comprises a connecting plate (101), a connecting hole (102) is formed in the outer side wall of the connecting plate (101), one end of a threaded hole (106) is formed in the inner side wall of the connecting hole (102), and the other end of the threaded hole (106) extends to the outer surface of the connecting plate (101);

the connecting plate (101) is characterized in that an inserting hole (103) is formed in the outer side wall of the connecting plate, a clamping groove (104) is formed in the inner side wall of the inserting hole (103), and a protruding block (105) is arranged on the inner side wall of the clamping groove (104).

3. A high load bearing resilient coupling as claimed in claim 2 wherein: the first plug-in assembly (2) comprises a supporting rod (201), one end of the supporting rod (201) is provided with a plug-in rod (207), the other end of the supporting rod (201) is fixedly connected with an end block (203), a threaded line (208) is arranged on the outer side wall of the plug-in rod (207), a connecting groove (204) is formed in the outer wall of one side, far away from the supporting rod (201), of the end block (203), a nut (202) is connected with the inner side wall of the threaded line (208) in a threaded mode, and a side hole (205) is formed in the inner side wall of the connecting groove (204);

tooth grooves (209) are formed in the outer side walls of the supporting rods (201), the inner side walls of the tooth grooves (209) are wedged with the outer side walls of the protruding blocks (105), and the outer side walls of the supporting rods (201) are connected with the inner side walls of the clamping grooves (104) in a clamping mode.

4. A high load bearing resilient coupling as claimed in claim 3 wherein: the first limiting assembly (3) comprises a limiting plate (301), and a limiting rod (302) is arranged on the outer side wall of the limiting plate (301);

the first plug-in assembly (2) further comprises a limiting hole (206), and the limiting hole (206) is formed in the outer side wall of the end block (203);

the outer side wall of the limiting rod (302) and the inner side wall of the limiting hole (206) are mutually wedged.

5. The high load bearing resilient coupling of claim 4, wherein: the damping component (4) comprises an elastic ring (401), a connecting block (402) is arranged on the outer side wall of the elastic ring (401), and a connecting hole (403) is formed in the outer side wall of the connecting block (402);

the outer side wall of the connecting block (402) is wedged with the inner side wall of the connecting groove (204), the aperture of the connecting hole (403) is the same as that of the side hole (205), and the connecting hole (403) and the side hole (205) are detachably connected by adopting an external connecting fastener.

6. The high load bearing resilient coupling of claim 4, wherein: the number of the limiting holes (206) is two, and the number of the end blocks (203) is a plurality, wherein the adjacent end blocks (203) are connected by adopting a first limiting assembly (3).

7. The high load bearing resilient coupling of claim 5, wherein: the elastic ring (401) is made of flexible synthetic rubber material, and the limiting plate (301) is made of elastic steel material.

8. The high load bearing resilient coupling of claim 1, wherein: the connecting structure between the shock absorption component (4) and the first plug-in component (2) is the same as the connecting structure between the shock absorption component (4) and the second plug-in component (5), the connecting structure between the second plug-in component (5) and the second coupling component (7) is the same as the connecting structure between the first plug-in component (2) and the first coupling component (1), and the connecting structure between the second plug-in component (5) and the second limiting component (6) is the same as the connecting structure between the first plug-in component (2) and the first limiting component (3).

9. The high load bearing resilient coupling of claim 1, wherein: the connecting structure between the second coupling component (7) and the rotating shaft is the same as the connecting structure between the first coupling component (1) and the output shaft, and the shaft diameter of the output shaft is larger than that of the rotating shaft.