CN102425614A - Elastic coupling - Google Patents

Abstract

The invention provides an elastic coupling. The coupling includes a first half coupling, a second half coupling and an elastic device. The elastic component is a twisted steel wire rope arranged along the circumferential direction, and the two ends of the twisted steel wire rope are respectively fixedly connected with the first half-coupling and the second half-coupling. In the present invention, twisted steel wire ropes are arranged between the two half-couplings, so that the couplings can transmit relatively large torque and have good damping effect.

Description

an elastic coupling

technical field

The invention relates to a shaft coupling, in particular to an elastic shaft coupling.

Background technique

At present, in the factory test and type test of large and medium-sized motors such as wind power generators and coal roadheaders, especially in the limit test of wind power generators, due to the structure of the wind power generator itself, it has a large impact during operation. It has a greater impact on drive chain components such as drive motors and couplings. The existing couplings are generally metal diaphragm couplings and universal joint couplings. The existing couplings have the following defects: 1) The coupling structure is complex, expensive, and easily damaged; 2) The coupling It cannot effectively absorb shocks, and the cushioning effect is poor.

Contents of the invention

The present invention proposes an elastic coupling, which can not only transmit relatively large torque, but also effectively absorb shocks to achieve the purpose of cushioning.

The present invention proposes an elastic coupling, which includes a first half coupling, a second half coupling and an elastic component, and one end of the elastic component is fixedly connected to the first half coupling, and the other end is connected to the first half coupling. The second coupling half is fixedly connected.

Further, the fixed connection method between the elastic member and the first half-coupling and the second half-coupling is further as follows: the ends of the first half-coupling and the second half-coupling are both arranged There is a connecting plate, and the connecting plate is provided with the same number of connecting holes as the number of twisted steel wire ropes in the axial direction; the end surface of the connecting plate close to the connecting shaft is provided with a circumferential groove; the end of the elastic part is provided with a ring; the The end of the elastic component passes through the connection hole, the collar passes through the ring and is arranged in the circumferential groove, and the retaining ring presses the collar and is fixedly connected with the connection plate.

Further, the elastic component is a twisted steel wire rope 4 or fibers arranged at least one turn along the circumferential direction, and the tensile strength of the fibers is greater than 500 MPa.

Further, the twisted steel wire ropes or fibers arranged in the same circle are parallel to each other.

Further, the twisted steel wire ropes 4 or fibers of two adjacent turns are arranged at an angle.

Further, the angle formed by the twisted steel wire rope 4 or fibers of two adjacent turns is in the range of 60°-160°.

In the present invention, an elastic component is arranged between the two half-couplings, so that the coupling can effectively absorb impact while transmitting relatively large torque, so as to achieve the purpose of cushioning.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural representation of elastic shaft coupling of the present invention;

Fig. 2 is an axial sectional view of an elastic coupling of the present invention;

Fig. 3 is the axial sectional view of half coupling of the present invention;

Fig. 4 is A-A sectional view of Fig. 3;

Fig. 5 is the B-B sectional view of Fig. 3;

Fig. 6 is a schematic structural view of the elastic coupling of the present invention;

Fig. 7 is a left view of the elastic coupling of the present invention;

Fig. 8 is a sectional view of two elastic couplings connected in series;

Fig. 9 is a structural schematic diagram of two elastic couplings connected in series.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment one:

The present invention proposes an elastic coupling, which includes a first half coupling, a second half coupling and an elastic component, wherein one end of the elastic component is fixedly connected to the first half coupling, and the other end is connected to the second half coupling. The shaft is fixedly connected.

As shown in FIG. 1 , the elastic component in this embodiment is a twisted steel wire rope 4 , the two ends of which are fixedly connected to the first half coupling 1 and the second half coupling 5 respectively. The twisted steel wire ropes 4 are arranged at least once in the circumferential direction, and the twisted steel wire ropes 4 arranged in the same circle are parallel to each other. If the arrangement of twisted steel wire ropes is more than two turns, the twisted steel wire ropes of two adjacent turns are arranged at an angle, and the value range of the formed angle β is preferably 60°-160°.

Preferably, the end of the twisted steel wire rope 4 is fixedly connected to the first half-coupling 1 and the second half-coupling 5 as shown in Figures 1, 2 and 5, specifically: the first half-coupling The ends of the coupling 1 and the second half-coupling 5 are both provided with a connecting disc 10, and the end face of the connecting disc 10 close to the connecting shaft is provided with a circumferential groove 6, and the connecting disc 10 is provided with a shaft corresponding to the twisted steel wire rope in the axial direction. Connecting hole 7, twisted steel wire rope 4 end is provided with a circular ring 12, the circular ring 12 of the end of twisted steel wire rope 4 passes through connecting hole 7, collar 3 passes through circular ring 12, and collar 3 is arranged in the circumferential groove 6, the retaining ring 2 presses the collar 3 and is fixedly connected with the connection plate 10. In practice, the collar 3 has various structures, as long as its length is greater than the diameter of the connecting hole and can be stuck in the circumferential groove 6, round steel is preferred. Further preferably, after the round steel passes through the ring 12, the two ends of the round steel are welded.

Preferably, the retaining ring 2 is a ring structure, and an annular boss is arranged on one end surface of the ring structure. The radial width of the boss is the same as the radial width of the circumferential groove 6. When connecting, the boss is arranged in the circumferential groove. 6, press the collar 3, and the edge of the ring structure is fixedly connected with the connection plate 10. In a specific implementation, the fixed connection between the edge of the ring structure and the connection plate 10 is enough, and the connection forms are various. In this embodiment, the edge of the ring structure and the connection plate 10 are connected by bolts, as shown in Figure 2 and Figure 4, there are also bolt holes arranged on the edge of the ring structure, and connecting holes are arranged at the bottom of the circumferential groove 6 13. The bolts 11 pass through the bolt holes and the connecting holes 13 to fix the retaining ring 2 on the connecting plate 10, as shown in Fig. 4-Fig. 7 .

In specific implementation, the twisted steel wire rope 4 is preferably arranged in two turns, as shown in Figure 1 and Figure 3, including the connecting hole 7 and the inner ring connecting hole 8, the arrangement direction of the inner twisted steel wire rope is the same as the arrangement of the outer twisted steel rope The directions are opposite, that is, if the twisted steel wire rope 4 of the outer ring is inclined to the right, the twisted steel rope 4 of the inner ring is then inclined to the left.

The twisted steel wire rope among the present invention is braided, first weaves a thinner steel wire rope with a plurality of thin steel wire ropes, then weaves thick steel wire ropes with several or more thinner steel wire ropes, during specific implementation, according to the joint The actual torque transmitted by the shaft and the torque requirements are determined.

The coupling shaft hole 9 in the present invention can adopt single key, double key, spline or optical shaft expansion and tightening connection mode.

In actual operation, the elastic couplings of the present invention can also be used in series, as shown in Fig. 8 and Fig. 9 .

The elastic coupling of the present invention makes full use of the flexibility and rigidity of twisted steel wire ropes, has a simple structure, low cost, and is easy to manufacture. The all-metal structure can be used in various complex working conditions, easy to maintain, stable in performance, large in transmission torque, and capable of absorbing tests The impact of the motor, the shock absorption effect is good.

Embodiment two:

The structure of this embodiment is basically the same as that of Embodiment 1, except that the elastic device in this embodiment is made of fiber, and the tensile strength of the fiber is greater than 500 MPa.

The elastic coupling of the present invention makes full use of the flexibility and rigidity of twisted steel wire ropes, has a simple structure, low cost, and is easy to manufacture. The all-metal structure can be used in various complex working conditions, easy to maintain, stable in performance, large in transmission torque, and capable of absorbing tests The impact of the motor, the shock absorption effect is good.

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

Claims (6)

1. an elastic coupling flexible coupling comprises first half-coupling (1) and second half-coupling (5),

It is characterized in that, also comprise

Elastic member, and

One end of said elastic member is fixedly connected with said first half-coupling (1), and the other end is fixedly connected with said second half-coupling (5).

2. according to each described elastic coupling flexible coupling in the claim 1, it is characterized in that,

Said elastic member with the mode that is fixedly connected of said first half-coupling (1) and second half-coupling (5) further is:

The end of said first half-coupling (1) and second half-coupling (5) is provided with land (10);

Said land (10) is provided with vertically and twists the identical attachment hole (7) of system wire rope quantity;

Said land (10) is provided with circumferential groove (6) near the end face of coupling shaft;

The end of said elastic member is provided with an annulus (12);

Said attachment hole (7) is passed in the end of said elastic member, and collar (3) passes said annulus (12) and is arranged in the said circumferential groove (6), and back-up ring (2) compresses collar (3) and is fixedly connected with land (10).

3. according to claim 1 or the described elastic coupling flexible coupling of claim 2, it is characterized in that,

Said elastic member is strand system wire rope (4) or a fiber of along the circumferential direction arranging a circle at least, and the tensile strength of said fiber is greater than 500MPa.

4. elastic coupling flexible coupling according to claim 3 is characterized in that,

Each the strand system wire rope or the fiber that are arranged in the same circle are parallel to each other.

5. elastic coupling flexible coupling according to claim 4 is characterized in that,

The strand system wire rope (4) or the fiber of two adjacent rings are arranged at angle.

6. elastic coupling flexible coupling according to claim 5 is characterized in that,

The strand system wire rope (4) of said two adjacent rings or filamentous angular range are 60 °～160 °.

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