Coupling

Abstract

The utility model discloses a coupler, which relates to the technical field of brake devices, and comprises a coupler body, a plurality of mounting blind holes, a plurality of connecting pieces and a plurality of connecting pieces, the plurality of connecting bodies are respectively mounted in the plurality of mounting blind holes; the coupler body is provided with a plurality of side faces, the mounting blind holes are formed in the side faces of the coupler body in pairs, and one side face without the mounting blind holes is arranged between any two side faces with the mounting blind holes. The connecting body comprises an elastic body and a ball, the elastic body is placed in the mounting blind hole, the ball is mounted in the mounting blind hole and is partially riveted with the mounting blind hole, one end of the ball is in contact with one end of the elastic body, and the other end of the ball extends out of the mounting blind hole and can be in contact with the friction plate. The service life of the coupler is short; and noise and abnormal noise are generated by friction between the coupler and a friction plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic brake device, especially to a coupling for electromagnetic brake. BACKGROUND

[0002] As a key component in mechanical transmission system, the coupling plays an important role in connecting two shafts in different mechanisms, ensuring the two shafts can rotate synchronously and efficiently transmit torque. In the typical structure of electromagnetic brake device, it is usually composed of a coupling, a tail plate, a friction plate, a release column, an electromagnetic coil, a spring, and a clutch plate. The working mechanism is that the friction plate is installed outside the coupling, and the coupling is connected with the transmission shaft of the power device. When the electromagnetic coil is in the power-off state, the clutch plate loses the electromagnetic attraction of the electromagnetic coil and is pressed against the electromagnetic brake mounting plate by the spring, fixing the coupling and preventing it from rotating due to inertia after the power is off, thus playing the role of brake and brake.

[0003] However, it cannot be ignored that the current electromagnetic brake device has many drawbacks in actual application, especially in the use of electric wheelchairs, electric vehicles and other electric mobility devices. The noise generated by the connection of the electromagnetic brake and the motor brings a very bad experience to the user. When the electromagnetic brake is in the release state, the connecting shaft of the power device will drive the coupling and the friction plate to rotate synchronously. In this process, the outer wall of the coupling continuously rubs against the inner wall of the friction plate. Due to the unstable gap between the coupling and the friction plate, the noise not only affects the comfort of the user, but also the dynamic balance of the long-term rotating friction plate is unstable, which will rub against the clutch plate and the mounting plate of the electromagnetic brake. High-intensity friction will cause the friction plate to wear out quickly, greatly shortening its normal service life. This not only increases the frequency of equipment maintenance, but also significantly increases the maintenance cost and the frequency of component replacement, which has a negative impact on the stable operation of the equipment and the overall economic benefit.

[0004] In the utility model with application number 201821203978.8, an automatic self-aligning coupling and its electromagnetic brake are disclosed. The side surface of the coupling body is provided with a groove, and a first compression spring is arranged in the groove. A steel ball is riveted in the groove and abuts against the first compression spring. During the rotation of the coupling body, the steel ball can reduce the friction between the coupling body and the friction plate. Although this can solve the problem of noise caused by the friction between the coupling and the friction plate, the first compression spring has a short service life and needs to be frequently maintained. Therefore, the coupling also needs to be frequently maintained. In addition, since the steel ball is riveted to the coupling body, frequent maintenance may cause the riveting part of the coupling to fail, causing the steel ball and the first compression spring to separate from the coupling body, and thus the coupling and the friction plate continue to rub and produce noise. UTILITY MODEL CONTENTS

[0005] Based on this, in order to solve the above problems, the utility model provides a coupling, through reducing the friction generated by the coupling body and the friction plate, solve the current coupling in use, the coupling needs frequent maintenance, the service life of the coupling is shorter and the coupling and the friction plate friction noise and abnormal sound problem.

[0006] The technical scheme of the utility model is:

[0007] A coupling, comprising:

[0008] The coupling body is provided with a plurality of installation blind holes;

[0009] A plurality of connecting bodies are respectively installed in the plurality of installation blind holes;

[0010] Among them, the coupling body has multiple side faces, and the plurality of installation blind holes are respectively arranged in pairs on the side faces of the coupling body, and there is a side face without installation blind hole between any two side faces provided with installation blind hole;

[0011] The connecting body includes an elastic body and a ball, the elastic body is placed in the installation blind hole, the ball is installed in the installation blind hole and partially riveted with the installation blind hole, one end of the ball contacts one end of the elastic body, and the other end of the ball extends out of the installation blind hole and can contact the friction plate.

[0012] Preferably, the coupling body is provided with a connecting shaft hole, and the connecting shaft hole penetrates the center of the coupling body.

[0013] Preferably, each installation blind hole is perpendicular to the side face of the coupling body where the installation blind hole is located.

[0014] Preferably, the elastic body is a spring, the end of the elastic body contacts the end of the installation blind hole close to the connecting shaft hole, and the side face of the elastic body is in sliding fit with the inner side wall of the installation blind hole.

[0015] Preferably, the ball is a steel ball, a limiting riveting portion is arranged in the end of the installation blind hole away from the connecting shaft hole, the limiting riveting portion is used for preventing the ball from separating from the installation blind hole, one end of the ball is partially riveted with the limiting riveting portion, and the ball can slide and rotate in the installation blind hole.

[0016] Preferably, the coupling body is provided with a plurality of threaded holes, and the plurality of threaded holes are respectively arranged on the side faces of the coupling body without installation blind hole, for connecting the coupling body with the friction plate.

[0017] Preferably, the coupling body is a regular hexagonal prism, and the coupling body has six side faces.

[0018] Preferably, the number of installation blind holes is three pairs, and the three pairs of installation blind holes are respectively arranged on three non-adjacent side faces of the coupling body.

[0019] Preferably, the number of connecting bodies is three pairs, and the three pairs of connecting bodies are respectively arranged in the three pairs of mounting blind holes.

[0020] Preferably, the number of threaded holes is one pair, and the one pair of threaded holes are respectively arranged on the one pair of sides of the shaft coupling body which are not provided with the mounting blind holes, and only one side provided with the mounting blind hole is arranged between the one pair of sides provided with the threaded holes, and machine screws for connecting the friction plate are arranged in the one pair of threaded holes, and the machine screws are screwed with the threaded holes.

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] The utility model discloses a kind of couplings, including shaft coupling body and friction plate, the shaft coupling body is provided with three pairs of mounting blind holes, and the three pairs of mounting blind holes are respectively arranged in the three pairs of sides of the shaft coupling body, and the three pairs of sides are respectively provided with connecting axis hole, and the connecting axis hole is provided with connecting body, and the connecting body is provided with elastic body, and the elastic body is provided with ball, and the ball is arranged in the mounting blind hole. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is a kind of coupling structure schematic view described in the embodiment of the utility model;

[0024] Fig. 2 It is a kind of coupling partial structure schematic view described in the embodiment of the utility model;

[0025] Fig. 3 It is a kind of coupling cross section structure schematic view described in the embodiment of the utility model;

[0026] REFERENCE SIGNS:

[0027] 10-shaft coupling body, 100-mounting blind hole, 101-side, 102-connecting axis hole, 103-limit riveting, 104-threaded hole, 105-machine screw, 20-connecting body, 200-elastic body, 201-ball. DETAILED DESCRIPTION

[0028] The embodiments of the utility model will be described below in detail with reference to the drawings.

[0029] Embodiment:

[0030] As Figs. 1 to 3 shown, in order to solve the above problems, the embodiment discloses a coupling, comprising:

[0031] Coupling body 10, be equipped with a plurality of installation blind hole 100 on coupling body 10;

[0032] A plurality of connecting bodies 20, a plurality of connecting bodies 20 are installed in a plurality of installation blind hole 100 respectively;

[0033] Among them, coupling body 10 has multiple side faces 101, a plurality of installation blind hole 100 is arranged on the side face 101 of coupling body 10 respectively in pairs, and there is a side face 101 not provided with installation blind hole 100 between any two side faces 101 provided with installation blind hole 100;

[0034] Connecting body 20 includes elastomer 200 and ball 201, elastomer 200 is placed in installation blind hole 100, ball 201 is installed in installation blind hole 100, and is partially riveted with installation blind hole 100, one end of ball 201 contacts elastomer 200, and the other end of ball 201 extends to the outside of installation blind hole 100 and can contact the friction plate.

[0035] The utility model discloses a ball 201 is installed in installation blind hole 100, and is partially riveted with installation blind hole 100, simultaneously makes one end of ball 201 contact elastomer 200, and the other end extends to the outside of installation blind hole 100 and contacts the friction plate, when coupling body 10 and the relative displacement of friction plate, the rolling friction of ball 201 replaces the sliding friction between coupling body 10 and the friction plate. On the one hand, the rolling friction is relatively stable, and elastomer 200 can absorb part of the vibration energy generated when the coupling main body rotates, reduces the noise generated due to vibration, so that coupling body 10 is more quiet when working;On the other hand, the rolling friction of ball 201 is relative to the sliding friction, reduces the heat and wear generated by friction, so that coupling body 10 can maintain good working condition for a longer period of time, prolongs the service life of coupling body 10 as a whole. At the same time, connecting body 20 is arranged in pairs, which can greatly prolong the service life of elastomer 200. The coupling of the prior art needs frequent maintenance, the service life of the coupling is short, and the coupling and the friction plate generate noise and abnormal sound when rubbing.

[0036] The coupling body 10 is provided with a connecting shaft hole 102 penetrating the center of the coupling body 10. Each mounting blind hole 100 is perpendicular to the side surface 101 of the coupling body 10 where the mounting blind hole 100 is located. The mounting blind hole 100 is perpendicular to the side surface 101 where the mounting blind hole 100 is located, which can facilitate the compression or reset of the elastic body 200 after installation.

[0037] The elastic body 200 is a spring, one end of the elastic body 200 is in contact with the end of the mounting blind hole 100 close to the connecting shaft hole 102, and the side surface 101 of the elastic body 200 is in sliding fit with the inner side wall of the mounting blind hole 100. The use of the spring in the prior art for the elastic body 200 can be beneficial to support the ball 201 and absorb the vibration energy generated during the rotation of the coupling body to some extent.

[0038] The ball 201 is a steel ball, the end of the mounting blind hole 100 away from the connecting shaft hole 102 is provided with a limiting riveting part 103, the limiting riveting part 103 is used to prevent the ball 201 from separating from the mounting blind hole 100, the ball 201 is partially riveted with the limiting riveting part 103, and the ball 201 can slide and rotate in the mounting blind hole 100. That is, the ball 201 and the mounting blind hole 100 have a slidable and rotatable relationship (for example, the ball 201 and the mounting blind hole 100 are clearance fitted, the ball 201 is partially riveted with the limiting riveting part 103, and the limiting riveting part 103 is only used to prevent the ball 201 from separating from the mounting blind hole 100). The use of the steel ball in the prior art for the ball 201 can be beneficial to prolong the service life.

[0039] The coupling body 10 is provided with a plurality of threaded holes 104, and the plurality of threaded holes 104 are arranged on the side surface 101 of the coupling body 10 where no mounting blind hole 100 is arranged, and are used to connect the coupling body 10 with the friction plate. The arrangement of the threaded hole 104 can facilitate the connection of the coupling body 10 with the friction plate.

[0040] In one embodiment, the coupling body 10 is a regular hexagonal prism, and the coupling body 10 has six side surfaces 101. The number of mounting blind holes 100 is three pairs, and the three pairs of mounting blind holes 100 are arranged on three non-adjacent side surfaces 101 of the coupling body 10. The number of connecting bodies 20 is three pairs, and the three pairs of connecting bodies 20 are installed in the three pairs of mounting blind holes 100. The number of threaded holes 104 is one pair, and the one pair of threaded holes 104 are arranged on the pair of side surfaces 101 of the coupling body 10 where no mounting blind hole 100 is arranged, and there is only one side surface 101 provided with a mounting blind hole 100 between the pair of side surfaces 101 provided with threaded holes 104. A machine screw 105 for connecting with the friction plate is arranged in the pair of threaded holes 104, and the machine screw 105 is in threaded connection with the threaded hole 104.

[0041] The utility model discloses a working principle:

[0042] The utility model discloses a working principle: When the shaft coupling body 10 and the friction plate relative displacement, through the rolling friction of the ball 201, the sliding friction between the shaft coupling body 10 and the friction plate is replaced.One, the rolling friction is relatively stable, and the elastic body 200 can absorb part of the vibration energy produced when the shaft coupling body rotates, reduces the noise produced because of vibration, makes the shaft coupling body 10 be more quiet when working, on the other hand, the rolling friction of the ball 201 is relative to the sliding friction, reduces the heat and abrasion produced by friction, makes the shaft coupling body 10 can keep good working condition in longer time, prolongs the service life of the shaft coupling body 10 as a whole.Meanwhile, the connecting body 20 is set up in pairs, can greatly prolong the service life of the elastic body 200.

[0043] The above-mentioned embodiment only expresses the specific implementation of the utility model, and the description is more specific and detailed, but it can not be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of deformation and improvement can be made, and these all belong to the protection scope of the utility model.

Claims

1. A coupling, characterized in that The utility model relates to a coupling body (10) is provided with a plurality of installation blind hole (100), a plurality of connecting body (20) is installed in a plurality of installation blind hole (100) respectively, and the coupling body (10) has a plurality of side (101), and a plurality of installation blind hole (100) is arranged in pairs on the side (101) of coupling body (10) respectively, and there is a side (101) not being provided with installation blind hole (100) between any two sides (101) provided with installation blind hole (100). The connecting body (20) includes an elastic body (200) and a ball (201), the elastic body (200) is placed in the installation blind hole (100), the ball (201) is installed in the installation blind hole (100) and partially riveted with the installation blind hole (100), one end of the ball (201) contacts one end of the elastic body (200), and the other end of the ball (201) extends out of the installation blind hole (100) and can contact the friction plate. The coupling body (10) is provided with a connecting shaft hole (102) penetrating the center of the coupling body (10). Each installation blind hole (100) is perpendicular to the side (101) of the coupling body (10) where the installation blind hole (100) is located. The elastic body (200) is a spring, the end of the elastic body (200) contacts the end of the installation blind hole (100) close to the connecting shaft hole (102), and the side (101) of the elastic body (200) is in sliding fit with the inner side wall of the installation blind hole (100).

2. A coupling according to claim 1, wherein, The ball (201) is a steel ball, a limiting riveting position (103) is arranged in the end of the installation blind hole (100) away from the connecting shaft hole (102), the limiting riveting position (103) is used for preventing the ball (201) from being separated from the installation blind hole (100), one end of the ball (201) is partially riveted with the limiting riveting position (103), and the ball (201) can slide and rotate in the installation blind hole (100).

3. A coupling according to claim 2, wherein, The coupling body (10) is provided with a plurality of threaded holes (104), and the plurality of threaded holes (104) are arranged on the side (101) of the coupling body (10) not provided with the installation blind hole (100), and are used for connecting the coupling body (10) and the friction plate.

4. A coupling according to claim 3, wherein, The coupling body (10) is a regular hexagonal prism, and the coupling body (10) has six sides (101).

5. A coupling according to claim 4, wherein, The number of installation blind holes (100) is three pairs, and the three pairs of installation blind holes (100) are arranged on three non-adjacent sides (101) of the coupling body (10).

6. A coupling according to claim 5, wherein, The number of connecting bodies (20) is three pairs, and the three pairs of connecting bodies (20) are installed in the three pairs of installation blind holes (100).

7. A coupling according to claim 6, wherein, ​ 8. A coupling according to claim 7, wherein, ​ 9. A coupling according to claim 8, wherein, ​ 10. A coupling according to claim 9, wherein, The number of the threaded holes (104) is a pair, the pair of threaded holes (104) are arranged on the pair of sides (101) of the coupling body (10) which are not arranged with the mounting blind holes (100), and the pair of sides (101) arranged with the threaded holes (104) only have one side (101) arranged with the mounting blind hole (100), and the pair of threaded holes (104) are arranged with the machine screws (105) for connecting with the friction plate, and the machine screws (105) are threadedly connected with the threaded holes (104).

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