CN108071704B - An anti-torsion coupling - Google Patents

Abstract

The invention provides an anti-torsion coupling, which includes a coupling body. The coupling body includes a deformation part in the middle and fixed parts at both ends; the fixed part includes a connecting section and a transition section, and the transition section is Cone-shaped structure, the large diameter end of the transition section is on the side of the deformation section; a spiral cutting groove is provided along the circumferential direction on the transition section; a metal connecting sleeve is provided on the inner wall of the fixed section, and the metal connecting sleeve extends out of the fixed section There are connection holes on the outer end of the part. The invention has a simple structure and reasonable design. The fixed part is used to connect with the external shaft body, and the deformation part itself has good structural strength and strong torsion resistance, which effectively ensures that the coupling can be used in complex tasks such as tension and torsion. It is not easy to be damaged under normal conditions, works stably and reliably, and has a long service life.

Description

An anti-torsion coupling

Technical field

The invention belongs to the technical field of mechanical equipment, and in particular relates to an anti-torsion coupling.

Background technique

In existing industrial production technology, it is often necessary to connect some lightweight precision rotating accessories to rotating devices such as motor spindles, so as to connect two shafts in different mechanisms so that they can rotate together to transmit torque and perform high-speed and heavy-load operation. In the power transmission, it plays the role of buffering, shock absorption and improving the dynamic performance of the shaft system. A coupling is a mechanical part used to connect two shafts (the driving shaft and the driven shaft) in different mechanisms to rotate together to transmit torque. Under working conditions with large impact loads and frequent reversals, the coupling is in poor stress condition and is prone to damage due to various forces such as tension and torsion. Once the coupling is damaged, it is easy to cause equipment failure or even It is easy to cause safety accidents.

Contents of the invention

In view of this, the invention aims to overcome the above-mentioned defects in the prior art and propose an anti-torsion coupling.

In order to achieve the above objectives, the technical solution created by the present invention is achieved as follows:

An anti-torsion coupling includes a coupling body that includes a deformation portion in the middle and fixed portions at both ends; the fixed portion includes a connecting section and a transition section, and the transition section is a cone-cylindrical structure. The large diameter end of the transition section is on one side of the deformation section; a spiral cutting groove is provided along the circumferential direction on the transition section; a metal connecting sleeve is provided on the inner wall of the fixed section, and the metal connecting sleeve extends out of the outer end of the fixed section Equipped with connection holes.

Furthermore, the deformation part and the fixing parts at both ends are an integrally formed structure.

Furthermore, the coupling body is made of rubber material.

Further, the depth of the spiral cutting groove is 1/3-1/2 of the wall thickness of the transition section.

Further, the deformation part is a bellows-shaped structure, and the height of the wave peak is greater than the height of the wave trough.

Furthermore, a reinforcing ring is provided at the wave peak position of the deformation part.

Further, the reinforcing ring is arranged inside the wave crest.

Furthermore, the reinforcing ring is a metal ring made of spring steel or a highly elastic non-metal ring.

Compared with the existing technology, the invention has the following advantages:

(1) The invention has a simple structure and reasonable design. The fixed part is used to connect with the external shaft body, and the deformation part itself has good structural strength and strong torsion resistance, which effectively ensures that the coupling can be used under tension and torsion. It is not easily damaged under complex working conditions, works stably and reliably, and has a long service life.

(2) The depth of the spiral cutting groove is 1/3-1/2 of the wall thickness of the transition section. It not only ensures that the transition section is not easy to break, but also provides better anti-torsion effect.

Description of the drawings

The accompanying drawings that constitute a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a schematic structural diagram created by the present invention;

Figure 2 is a cross-sectional view of the structure created by the present invention.

Explanation of reference symbols:

1-deformation part; 2-fixed part; 3-connection section; 4-transition section; 5-spiral cutting groove; 6-metal connecting sleeve; 7-connection hole; 8-reinforcement ring; 9-wave crest; 10-wave trough.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention. The invention and simplified description do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation on the invention. Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined by "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the creation of the present invention can be understood through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

An anti-torsion coupling, as shown in Figures 1 to 2, includes a coupling body, which includes a deformation part 1 in the middle and fixed parts 2 at both ends; the fixed part 2 includes a connecting section 3 and The transition section 4 has a cone-shaped structure, and the large diameter end of the transition section is on the side of the deformation part 1; a spiral cutting groove 5 is provided along the circumferential direction on the transition section; the inner wall of the fixed part 2 is provided with a metal Connecting sleeve 6, the metal connecting sleeve 6 is provided with a connecting hole 7 on the part extending from the outer end of the fixed part.

The above-mentioned deformation part 1 and the fixed parts 2 at both ends are an integrally formed structure, which has high structural strength and good stability. Due to the integrated structural design, there will be no stress concentration at the connection and the service life will be longer.

The above-mentioned coupling body is made of rubber material. The coupling body itself has a certain degree of flexibility. When subjected to torsion, it has the ability to deform and is not easily damaged.

The depth of the spiral cutting groove 5 is preferably 1/3-1/2 of the wall thickness of the transition section 4 . Because the depth of the spiral cutting groove should not be too deep. If the groove depth is too large, the transition section will easily break at the spiral cutting groove when subjected to tension or torsion. If the groove depth is too small, the spiral cutting groove will not be able to perform well. The anti-torsion and tensile deformation capabilities cannot achieve the best anti-torsion effect.

It should be noted that the transition section is provided with a spiral cutting groove 5, which cooperates with the deformation part 1 to effectively improve the torsion resistance of the coupling. The transition section reduces the burden on the deformation part when it is stressed, which is equivalent to It shares part of the torque to ensure that the force on the deformation part is balanced and the coupling is not easily damaged.

The above-mentioned deformation part 1 is a bellows-shaped structure, and the height of the wave crest 9 is greater than the height of the wave trough 10 . Since the deformation on the outer circumferential surface of the coupling is greater than the deformation on the inner side when bending or torsion occurs, higher structural strength is required at the outer circumference to ensure that the outer circumference can produce greater deformation than the inner side. , can better ensure the overall stable operation of the coupling and be less prone to damage. Therefore, the height of the wave crest is greater than the height of the wave trough, so that the wave crest can produce a greater deformation relative to the wave trough. At the same time, the cross-section at the wave crest is larger than the cross-section at the wave trough to improve its strength.

A reinforcing ring 8 is provided at the peak position of the deformation portion 1 . The reinforcing ring 8 is preferably arranged inside the wave crest. Through the set of reinforcing rings, the torsion resistance at the outer circumference of the deformation part is effectively improved, and the impact resistance is also significantly enhanced. The coupling is not easy to break at the peak position of the deformation part, ensuring its long service life.

Usually, the reinforcing ring 8 is a metal ring made of spring steel or a highly elastic non-metal ring. Since the reinforcement itself also has a certain deformation ability, it will not affect the deformation amount of the deformation part when it is stressed. It complements the deformation part and greatly improves the torsion resistance of the coupling.

The invention has a simple structure and reasonable design. The fixed parts at both ends of the deformation part are used to connect with the external shaft body, and the deformation part itself has good structural strength and strong torsion resistance, which effectively ensures that the coupling can It is not easily damaged under complex working conditions such as twisting, stable and reliable work, and has a long service life.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in within the protection scope of the present invention.

Claims (5)

1. A torsional coupling, characterized in that:

the coupling comprises a coupling body, wherein the coupling body comprises a middle deformation part and fixing parts at two ends; the fixing part comprises a connecting section and a transition section, the transition section is of a cone-shaped structure, and one end of the transition section with a large diameter is positioned at one side of the deformation part; a spiral cutting groove is formed in the transition section along the circumferential direction; the inner wall of the fixing part is provided with a metal connecting sleeve, and a connecting hole is formed in the part of the metal connecting sleeve extending out of the outer end of the fixing part; the depth of the spiral cutting groove is 1/3-1/2 of the wall thickness of the transition section; the deformation part and the fixing parts at the two ends are of an integrated structure; the coupling body is made of rubber materials.

2. A torsional coupling as defined in claim 1, wherein:

the deformation part is of a corrugated tubular structure, and the crest height of the deformation part is larger than the trough height.

3. A torsional coupling as defined in claim 2, wherein:

and a reinforcing ring is arranged at the crest position of the deformation part.

4. A torsional coupling as claimed in claim 3, characterized in that:

the reinforcing ring is arranged inside the wave crest.

5. A torsional coupling as claimed in claim 3, characterized in that:

the reinforcing ring is a metal ring made of spring steel or a high-elasticity nonmetal ring.