CN213685025U

CN213685025U - Elastic pin coupling with wear-resistant pins

Info

Publication number: CN213685025U
Application number: CN202022417586.5U
Authority: CN
Inventors: 徐金星; 纪楗煜
Original assignee: KSB Shanghai Pump Co Ltd
Current assignee: KSB Shanghai Pump Co Ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-07-13
Anticipated expiration: 2030-10-27

Abstract

The utility model discloses an elastic pin coupling with a wear-resistant pin, which comprises a driving end coupling, a driven end coupling, a pin, an elastic body and a cylindrical sleeve; the driving end coupler and the driven end coupler are provided with coaxial pin inner holes; the rear half section of the pin is arranged in a pin inner hole of the driving end coupling, and the front half section of the pin is arranged in a pin inner hole of the driven end coupling; the elastic body is sleeved on the rear half section of the pin, and the cylindrical sleeve is sleeved on the outer side of the elastic body; the elastic body is arranged into a tooth-shaped structure, and the outer diameter of the outer circle of the elastic body is smaller than the inner diameter of the inner hole of the pin of the driving end coupling; the outer surface of the cylindrical sleeve is provided with a plurality of axial heat dissipation grooves and a plurality of exhaust holes, and the inner surface of the cylindrical sleeve is provided with a radial groove; the radial grooves are matched with the tooth-shaped structures of the elastic bodies. The utility model discloses both guaranteed former elasticity pin shaft coupling elastic compensation power, improved elasticity pin wearability again, prolonged the down interval time of changing vulnerable part.

Description

Elastic pin coupling with wear-resistant pins

Technical Field

The utility model relates to an elasticity pin shaft coupling, more specifically say, relate to an elasticity pin shaft coupling with wear-resisting pin.

Background

The elastic pin coupling realizes the connection of the two half couplings through the elastic pin and realizes that the driving shafts of different mechanisms drive the driven shaft to transmit torque to rotate together. The elastic pin coupling has the advantages of simple structure, convenience in installation and maintenance, large transmission torque, low price, good buffering and damping performance, certain shaft offset compensation capability and the like.

As shown in fig. 1, the elastic pin coupling is composed of a driving-end coupling half 1, a driven-end coupling half 2, and an elastic pin member, wherein the elastic pin is composed of a pin 3, an elastic body 4, a nut 5, and a lock washer 6.

The existing elastomer 4 is usually made of die-cast rubber or nylon material, and the rubber material has good elasticity, good compensation performance and lower price, but has poorer wear resistance than nylon; the nylon material has better wear resistance than rubber, but has poorer elasticity and higher price.

In order to enhance the elastic compensation capability of the elastic pin coupling, the existing shape of the elastic body 4 usually adopts a tooth-shaped structure with local contact, so that the contact area between the excircle of the elastic body 4 and the pin inner hole of the driving end half coupling 1 is small, and the specific pressure P value is large, the driving end half coupling 1 and the driven end half coupling 2 usually adopt cast iron, ductile iron or steel, therefore, in the process of driving the driving end half coupling 1 and driving the driven end half coupling 2, the excircle of the elastic body 4 is always moved and extruded and rubbed in the pin inner hole of the half coupling due to the reasons of misalignment of the axes of the two half couplings, position error of the pin inner hole, axial play of a rotor and the like, the abrasion of the elastic body 4 is poor compared with an iron material, the elastic body 4 is abraded, the fit clearance between the elastic body 4 and the pin inner hole is enlarged, so that the pump group operates and vibrates and has, the wearing parts need to be stopped and replaced periodically.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect that exists among the prior art, the utility model aims at providing an elasticity pin shaft coupling with wear-resisting pin, both guaranteed former elasticity pin shaft coupling elastic compensation power, improved elasticity pin wearability again, prolonged the down interval of changing the vulnerable part.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an elastic pin coupling with a wear-resistant pin comprises a driving end coupling, a driven end coupling, a pin, an elastic body and a cylindrical sleeve;

the driving end coupler and the driven end coupler are provided with coaxial pin inner holes;

the rear half section of the pin is arranged in a pin inner hole of the driving end coupler, and the front half section of the pin is arranged in a pin inner hole of the driven end coupler;

the elastic body is sleeved on the rear half section of the pin, and the cylindrical sleeve is sleeved on the outer side of the elastic body;

the elastic body is arranged into a tooth-shaped structure, and the outer diameter of the outer circle of the elastic body is smaller than the inner diameter of the inner hole of the pin of the driving end coupling;

the outer surface of the cylindrical sleeve is provided with a plurality of axial heat dissipation grooves and a plurality of exhaust holes, and the inner surface of the cylindrical sleeve is provided with a radial groove;

the radial grooves are matched with the tooth-shaped structures of the elastic bodies.

Preferably, the elastic body is made of a rubber material with good elasticity.

Preferably, the cylindrical sleeve is made of a nylon material with good wear resistance.

Preferably, the axial heat dissipation grooves are arranged on the outer surface of the cylindrical sleeve in an inclined net shape.

Preferably, the axial heat dissipation grooves are arranged on the outer surface of the cylindrical sleeve in a wavy line shape.

Preferably, the axial heat dissipation groove is a semicircular groove.

Preferably, the inner surface of the rear end part of the cylindrical sleeve is provided with an inclined surface.

The utility model provides a pair of elasticity pin shaft coupling with wear-resisting pin has both guaranteed former elasticity pin shaft coupling elasticity compensation power, has improved elasticity pin wearability again, and the extension is shut down and is changed vulnerable part interval time, simultaneously, when changing the shaft coupling vulnerable part, can extrude the cylinder cover on the elastomer, changes new cylinder cover, needn't change the elastomer is whole, and economic nature is better. Because the elastic pin has small abrasion loss, the pump runs more stably, reliably and safely.

Drawings

FIG. 1 is a schematic structural view of a prior art elastomeric pin coupling;

fig. 2 is a schematic structural view of the elastic pin coupling of the present invention;

FIG. 3 is a schematic view of the installation of the pin, elastomer, and cylindrical sleeve of FIG. 2;

FIG. 4 is an enlarged schematic view of position A of FIG. 3;

FIG. 5 is an axial schematic view of the cylindrical sleeve of FIG. 3;

FIG. 6 is an enlarged schematic view of position B of FIG. 5;

FIG. 7 is a schematic view showing the arrangement of the axial heat dissipation grooves on the cylindrical sleeve in the elastic pin coupling according to the present invention in an oblique net shape;

fig. 8 is a schematic view showing that the axial heat dissipation grooves on the cylindrical sleeve of the elastic pin coupling of the present invention are wavy.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

Referring to fig. 2, the present invention provides an elastic pin coupling with wear-resistant pins, which includes a driving end coupling 10, a driven end coupling 11, pins 12, an elastic body 13, and a cylindrical sleeve 14.

The driving end coupler 10 and the driven end coupler 11 are provided with coaxial pin inner holes.

The rear half section of the pin 12 is installed in the pin inner hole of the driving end coupling 10, and the front half section of the pin 12 is installed in the pin inner hole of the driven end coupling 11 and fixed through a nut 15 and a lock washer 16.

The elastic body 13 is sleeved on the outer surface of the rear half section of the pin 12, and the cylindrical sleeve 14 is sleeved on the outer surface of the elastic body 13.

As shown in fig. 3 to 8, the elastic body 13 is made of rubber material and is configured to be a tooth-shaped structure, the tooth width and depth are slightly smaller than the tooth shape of the original elastic body, the elasticity of the original elastic body is not reduced, the outer diameter of the outer circle of the elastic body 13 is smaller than the inner diameter of the inner hole of the pin of the driving-end coupling 10, and a certain gap is left between the elastic body 13 and the inner hole of the pin of the driving-end coupling 10 for installing the cylindrical sleeve 14.

The cylindrical sleeve 14 is formed by adopting nylon material sleeve die pressing and is pressed on the outer ring of the elastic body 13 in a pressing mode, so that the contact area between the elastic body 13 and the inner hole of the pin of the driving end coupler 10 can be increased, the specific pressure P value can be reduced when torque is transmitted, and meanwhile, the cylindrical sleeve 14 is made of nylon material, so that the integral wear resistance and the wear resistance of the elastic pin part can be greatly improved.

The outer surface of the cylindrical sleeve 14 is provided with a plurality of axial heat dissipation grooves 17, and the elastic pin part generates heat through friction in the process of transmitting torque, so that the axial heat dissipation grooves 17 arranged on the outer surface of the cylindrical sleeve 14 are communicated with the end part of the outer surface of the cylindrical sleeve 14, air can enter between the elastic body 13 and the pin inner hole of the driving end coupling 10, and the air can enter to play a cooling role in operation. Meanwhile, the worn garbage and the like can be stored in the axial heat dissipation groove 17, and secondary wear is prevented. The axial heat dissipation grooves 17 are provided as semicircular grooves to reduce stress concentration.

The axial heat dissipation grooves 17 can be arranged in a shape of an oblique net (as shown in fig. 7) or a shape of a wavy line (as shown in fig. 8), so that the cylindrical sleeve 14 can be driven stably.

A plurality of exhaust holes 18 are formed in the outer surface of the cylindrical sleeve 14, so that the gas can be exhausted from the closed space in the tooth cavity after thermal expansion, the elastic body 13 and the inner hole of the pin of the driving end coupler 10 are prevented from being blocked due to expansion of air, and the elastic compensation performance is reduced.

Because the rotor is in operation, the elastic body 13 has axial float, the inner surface of the cylindrical sleeve 14 is provided with a plurality of radial grooves 19, and the radial grooves 19 are sleeved on the teeth of the elastic body 13, so that the cylindrical sleeve 14 is prevented from being separated in operation. The width B1 of the radial groove 19, the width B2 of the teeth on the elastic body 13, and the depth H of the radial groove 19 need to be controlled, so that the cylindrical sleeve 14 can be reliably fixed on the elastic body 13 after press fitting.

For the convenience of press fitting, the inner surface of the rear end portion of the cylindrical sleeve 14 is provided with an inclined surface having a certain inclination of a °.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. An elasticity pin shaft coupling with wear-resisting pin which characterized in that: the device comprises a driving end coupler, a driven end coupler, a pin, an elastic body and a cylindrical sleeve;

2. The elastomeric pin coupling with wear resistant pins of claim 1, wherein: the elastomer is made of rubber materials.

3. The elastomeric pin coupling with wear resistant pins of claim 1, wherein: the cylindrical sleeve is made of nylon materials.

4. The elastomeric pin coupling of claim 3, wherein: the axial heat dissipation grooves are arranged on the outer surface of the cylindrical sleeve in an inclined net shape.

5. The elastomeric pin coupling of claim 3, wherein: the axial heat dissipation grooves are arranged on the outer surface of the cylindrical sleeve in a wavy line shape.

6. An elastomeric pin coupling with a wear resistant pin according to claim 4 or 5, wherein: the axial heat dissipation groove is a semicircular groove.

7. The elastomeric pin coupling with wear resistant pins of claim 1, wherein: the inner surface of the rear end part of the cylindrical sleeve is provided with an inclined surface.