Brake

Abstract

The utility model discloses a brake, which belongs to the technical field of brakes and comprises a friction disc, a plastic-coated gear sleeve and a metal shaft sleeve, the plastic-coated gear sleeve is coaxially mounted in the friction disc, and the metal shaft sleeve is coaxially mounted in the plastic-coated gear sleeve. According to the utility model, the plastic-coated gear sleeve is arranged between the metal shaft sleeve and the friction disc, so that the plastic-coated gear sleeve not only can meet the strength requirement required by braking, but also has better sound absorption and vibration reduction performance. In addition, the O-shaped ring is installed in the circumferential direction of the plastic-coated gear sleeve, the connection tightness of the plastic-coated gear sleeve and the friction disc can be improved, the impact frequency between the plastic-coated gear sleeve and the friction disc is reduced, and then the vibration reduction and noise reduction effects are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to brake technology field, and particularly relates to brake. BACKGROUND

[0002] The brake is an automatic execution element commonly used in the servo motor, uses the power supply and spring as the power source to brake the friction disc, and transmits the torque through the shaft sleeve and the motor shaft to realize the braking of the servo motor.

[0003] With the increase of the application scene of the brake, the requirement of the brake is also increased. In the high response application scene, the brake often causes large noise due to the collision between the friction disc and the shaft sleeve or the shaft sleeve and the motor shaft, and the vibration transmission of the motor. The large noise not only affects the user's use experience, but also causes the wear of the parts and shortens the service life of the product. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the problem of large noise generated by the brake in the use process, and provides a brake.

[0005] In order to achieve the above purpose, the technical scheme of the utility model is as follows: a brake, comprising a friction disc, a plastic-coated gear sleeve and a metal shaft sleeve, the friction disc and the shaft sleeve are arranged on the outer wall of the plastic-coated gear sleeve, and the plastic-coated gear sleeve and the shaft sleeve are arranged on the outer wall of the metal shaft sleeve.

[0006] In an embodiment, the outer spline of the inner wall of the friction disc and the inner spline of the outer wall of the plastic-coated gear sleeve are embedded.

[0007] In an embodiment, at least one convex column is arranged on the inner wall of the plastic-coated gear sleeve.

[0008] In an embodiment, at least one second installation groove is arranged on the outer wall of the metal shaft sleeve, and the convex column and the second installation groove are embedded.

[0009] In an embodiment, a convex boss is arranged on one end of the friction disc, and the convex boss is installed in the third through hole arranged in the center of the movable armature.

[0010] In an embodiment, a groove is arranged on the outer wall of the plastic-coated gear sleeve in the circumferential direction, and an O-ring is installed in the groove.

[0011] In an embodiment, the brake further comprises a magnetic yoke, a coil, a movable armature and a fixed armature, the coil is coaxially arranged inside the magnetic yoke, the movable armature is axially connected with the magnetic yoke through a spring, the fixed armature is axially connected with the magnetic yoke through a screw of a sleeved guide column, the movable armature is coaxially arranged between the fixed armature and the magnetic yoke, and the friction disc is coaxially arranged between the fixed armature and the movable armature, and the plastic-encased gear sleeve is coaxially nested inside the friction disc.

[0012] In summary, the plastic-encased gear sleeve is arranged between the metal shaft sleeve and the friction disc, which can meet the strength requirement of braking, and has good sound absorption and vibration reduction performance. In addition, the O-ring is arranged in the circumferential direction of the plastic-encased gear sleeve, which can improve the connection tightness of the plastic-encased gear sleeve and the friction disc, reduce the impact frequency between the plastic-encased gear sleeve and the friction disc, and further strengthen the vibration reduction and noise reduction effect.

[0013] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following examples are given, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic view of the brake in the embodiment 1 of the utility model.

[0015] Figure 2 It is Figure 1 an exploded view of the brake in the embodiment 1 of the utility model.

[0016] Figure 3 It is Figure 1 a sectional view of the first embodiment of the brake in the embodiment 1 of the utility model.

[0017] Figure 4 It is Figure 1 a sectional view of the second embodiment of the brake in the embodiment 1 of the utility model. DETAILED DESCRIPTION

[0018] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following examples are given, and the accompanying drawings are described in detail as follows.

[0019] Figure 1 It is a schematic view of the brake in the embodiment 1 of the utility model. As shown in Figure 1 the brake 1 can be coaxially arranged in the motor shaft (see Figure 2On the ), a coil (see) can be used while energized. Figure 2 ) and magnetic yoke (see Figure 2 ) Attracting the movable armature (see) Figure 2 ), so that the fixed armature (see Figure 2 A space is created between the friction disc (see...) and the movable armature, and the friction disc (see...) Figure 2 Within the active space, through a metal bushing (see...) Figure 2 ) and plastic-coated gear sleeves (see Figure 2 It rotates synchronously with the motor shaft; it can also rotate with a spring (see [link]) in the event of a power outage. Figure 2 The movable armature is reset, and the movable armature and the fixed armature press against the friction disc, which locks the motor shaft, stopping the motor shaft from rotating.

[0020] Figure 1 for Figure 2 Exploded view of the central brake. (Example) Figure 3 As shown, the brake 1 includes a magnetic yoke 11, a coil 12, a movable armature 13, a friction disc 14, a spline sleeve 15, a fixed armature 16, a spring 17, and a guide post 18. The coil 12 is coaxially mounted inside the magnetic yoke 11. The movable armature 13 is axially connected to the magnetic yoke 11 via the spring 17. The first end of the spring 17 is installed inside the magnetic yoke 11, and the second end of the spring 17 is fixedly connected to the movable armature 13. The fixed armature 16 is axially connected to the magnetic yoke 11 via a screw. The guide post 18 is disposed outside the screw. The movable armature 13 is coaxially disposed between the fixed armature 16 and the magnetic yoke 11. The friction disc 14 is coaxially disposed between the fixed armature 16 and the movable armature 13. The spline sleeve 15 is coaxially nested inside the friction disc 14. The spline sleeve 15 includes a plastic-coated gear sleeve 151 and a metal bushing 152, with the metal bushing 152 coaxially nested inside the plastic-coated gear sleeve 151.

[0021] Figure 1 for Figure 2 A cross-sectional view of the first embodiment of the central brake. (Combined with...) Figure 3 and Figure 4It can be known that the magnetic yoke 11 includes a magnetic yoke body 111, a first through hole 112, a first mounting slot 113, a first counter bore 114 and a first screw hole 115, the first through hole 112 is arranged in the center of the magnetic yoke body 111, the first mounting slot 113 is arranged in the outer periphery of the first through hole 112, the first counter bore 114 and the first screw hole 115 are uniformly arranged in the outer periphery of the first mounting slot 113, and the first counter bore 114 and the first screw hole 115 are staggered and discontinuously arranged. The first mounting slot 113 is used for accommodating the coil 12, and the insulator 116 is arranged between the coil 12 and the magnetic yoke 11, so that the insulation degree between the coil 12 and the magnetic yoke 11 can be improved.

[0022] The movable armature 13 includes a movable armature body 131, a second through hole 132 and a first mounting hole 133, the second through hole 132 is arranged in the center of the movable armature body 131, and the first mounting hole 133 is uniformly arranged in the outer edge of the movable armature body 131. The second through hole 132 is coaxially arranged with the first through hole 112. The number and position of the first mounting hole 133 are matched with those of the first screw hole 115, and the number of the first mounting hole 133 is equal to that of the guide column 18. The guide column 18 is arranged in the first mounting hole 133, and the guide column 18 provides a path guide for axial movement of the movable armature 13. The first end of the spring 17 is fixedly arranged on the outer edge of the end face of the magnetic yoke 11, and the second end of the spring 17 is arranged in the first counter bore 114. The number and position of the spring 17 are matched with those of the first counter bore 114.

[0023] The fixed armature 16 includes a fixed armature body 161, a third through hole 162 and a second screw hole 163, the third through hole 162 is arranged in the center of the fixed armature body 161, and the second screw hole 163 is uniformly arranged in the outer edge of the fixed armature body 161. The third through hole 162 is coaxially arranged with the second through hole 132 and the first through hole 112. The number and position of the second screw hole 163 are matched with those of the first screw hole 115 and the first mounting hole 133, and the number of the second screw hole 163 is consistent with that of the guide column 18. The second screw hole 163 is aligned with the first screw hole 115, and the screw passing through the guide column 18 is arranged in the second screw hole 163 and the first screw hole 115, so that the fixed armature 16 is fixedly connected with the magnetic yoke 11.

[0024] The friction disc 14 comprises a friction disc body 141, a boss 142, a fourth through hole 143 and internal splines 144, the boss 142 is arranged at one end of the fixed armature 16, the fourth through hole 143 is arranged through the boss 142 and the friction disc body 141, and the internal splines 144 are arranged inside the fourth through hole 143. The boss 142 is installed in the third through hole 162.

[0025] The plastic-coated gear sleeve 151 comprises a plastic-coated gear sleeve body 1511, a fifth through hole 1512, external splines 1513 and at least one protruding column 1514, the fifth through hole 1512 is arranged through the plastic-coated gear sleeve body 1511, the external splines 1513 are arranged on the outer wall of the plastic-coated gear sleeve body 1511, and at least one protruding column 1514 is arranged on the inner wall of the plastic-coated gear sleeve body 1511. The plastic-coated gear sleeve 151 is installed in the fourth through hole 143, the external splines 1513 are matched with the internal splines 144 in shape, and the external splines 1513 and the internal splines 144 are engaged during installation. The force between the plastic-coated gear sleeve 151 and the friction disc 14 is uniform, the total contact area is large, the load that can be borne is large, and the guiding property is also improved through spline connection. The plastic-coated gear sleeve 151 is made of plastic material, which can meet the strength requirement of braking, improve the anti-vibration capability of the plastic-coated gear sleeve 151 in high-response and high-vibration occasions, and reduce the generation of noise. The shapes of the external splines 1513 and the internal splines 144 can be gear-shaped, or can be designed into other shapes according to requirements.

[0026] The metal shaft sleeve 152 comprises a metal shaft sleeve body 1521, a sixth through hole 1522 and at least one second installation groove 1523, the sixth through hole 1522 is arranged through the metal shaft sleeve body 1521, and at least one second installation groove 1523 is arranged on the outer wall of the metal shaft sleeve body 1521. The metal shaft sleeve 1523 is made of metal material through cold extrusion. The metal shaft sleeve 1523 is installed in the fifth through hole 1512, the second installation groove 1523 and the protruding column 1514 are correspondingly matched in shape and number and are embedded. The sixth through hole 1522 is coaxially installed on the motor shaft with the second through hole 132 and the first through hole 112, and the inner wall of the metal shaft sleeve 1523 is matched with the motor shaft (not shown in the figure) in an interference fit, so as to ensure that the relative positions of the two are not deviated. In addition, the metal shaft sleeve 152 can be wrapped by the plastic-coated gear sleeve 151 through a plastic coating process, and the two are integrally formed into the spline sleeve 15, which can ensure the strength and reduce the processing cost.

[0027] In the case of power failure, the movable armature 13 and the fixed armature 16 press the friction disc 14 in the axial direction, the friction disc 14 is locked by the movable armature 13 and the fixed armature 16 by friction, the plastic-encased gear sleeve 151 in the friction disc 14 and the metal shaft sleeve 152 also stop rotating, and the metal shaft sleeve 152 also synchronously slows down the rotating speed of the motor shaft until stopping.

[0028] The coil 12 generates a magnetic force when energized, attracting the movable armature 13 to generate an axial displacement along the guide column 18 in the direction of the magnetic yoke 11, the movable armature 13 is separated from the friction disc 14, and an active space is formed between the movable armature 13 and the fixed armature 16, and the friction disc 14 resumes rotation with the motor shaft.

[0029] The utility model discloses between the metal shaft sleeve 152 and the friction disc 14 set up the plastic-encased gear sleeve 151, compared with the prior art of the shaft sleeve of metal material and the friction disc direct contact, the plastic-encased gear sleeve 151 has better sound absorption performance, can effectively absorb sound wave, reduces the reflection and resonance of sound wave to realize the noise reduction, the plastic-encased gear sleeve 151 also has certain damping effect, can absorb mechanical vibration and convert into heat energy.

[0030] ​ It is the sectional view of the second embodiment. In order to further reduce the noise generated by the brake 1, a groove 1515 is formed on the outer wall of the plastic-encased gear sleeve 151, and an O-ring 19 is installed in the groove 1515. The O-ring 19 is made of rubber material. The O-ring 19 provides radial compression force to the plastic-encased gear sleeve 151 and the friction disc 14, improving the connection tightness of the plastic-encased gear sleeve 151 and the friction disc 14. It not only prevents the plastic-encased gear sleeve 151 and the friction disc 14 from sliding relative to each other and avoids gear face failure, but also reduces the impact frequency between the plastic-encased gear sleeve 151 and the friction disc 14, plays a role in reducing vibration and preventing shaking, and further realizes noise reduction.

[0031] In summary, the utility model provides a brake, by setting up the plastic-encased gear sleeve 151 between the metal shaft sleeve 152 and the friction disc 14, the plastic-encased gear sleeve 151 can not only meet the strength requirement of braking, but also has good sound absorption and vibration reduction performance. In addition, the O-ring 19 is installed around the plastic-encased gear sleeve 151, which can improve the connection tightness of the plastic-encased gear sleeve 151 and the friction disc 14, and further enhance the effect of vibration reduction and noise reduction.

[0032] Although the utility model has disclosed as above with examples, it is not used to limit the utility model, anyone with ordinary knowledge in the art can make some changes and decorations without departing from the spirit and scope of the utility model, so the protection scope of the utility model is defined by the appended patent application scope.

Claims

1. A brake, characterized in that, It includes a friction disc, a plastic-coated gear sleeve, and a metal bushing. The friction disc is coaxially sleeved on the outer wall of the plastic-coated gear sleeve, and the plastic-coated gear sleeve is coaxially sleeved on the outer wall of the metal bushing.

2. The brake as claimed in claim 1, characterized in that, The external splines on the inner wall of the friction disc and the internal splines on the outer wall of the plastic-coated gear sleeve are engaged.

3. The brake as described in claim 2, characterized in that, The inner wall of the plastic-coated gear sleeve is provided with at least one protrusion.

4. The brake as described in claim 3, characterized in that, At least one second mounting groove is formed on the outer wall of the metal bushing, and the protrusion and the second mounting groove are fitted together.

5. The brake as claimed in claim 1, characterized in that, A boss is provided at one end of the friction disc, and the boss is installed in the third through hole opened in the center of the movable armature.

6. The brake as described in any one of claims 1-5, characterized in that, The outer wall of the plastic-coated gear sleeve has a groove circumferentially formed, and an O-ring is installed in the groove.

7. The brake as described in any one of claims 1-5, characterized in that, The brake also includes a magnetic yoke, a coil, a movable armature, and a fixed armature. The coil is coaxially mounted inside the magnetic yoke. The movable armature is axially connected to the magnetic yoke via a spring. The fixed armature is axially connected to the magnetic yoke via a screw that mounts a guide post. The movable armature is coaxially disposed between the fixed armature and the magnetic yoke. The friction disc is coaxially disposed between the fixed armature and the movable armature. The plastic-coated gear sleeve is coaxially nested inside the friction disc.

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