CN216812600U

CN216812600U - Brake

Info

Publication number: CN216812600U
Application number: CN202220563857.4U
Authority: CN
Inventors: 蓝刚勇; 鲁查; 吴孔建
Original assignee: Aochuang Power Transmission Shenzhen Co ltd
Current assignee: Aochuang Power Transmission Shenzhen Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-06-24
Anticipated expiration: 2032-03-10

Abstract

The utility model provides a brake, wherein a shell of the brake is provided with a first installation space which is respectively positioned on an excitation coil and an inner ring of an elastic component, and the first installation space penetrates through the central position of the shell along the axial direction of the shell; the movable plate is positioned in the first installation space; the friction disc is arranged in the first mounting space and is positioned on one side of the movable plate close to the second shaft end; the armature is positioned at the second shaft end of the shell and is connected with the movable plate; the sealing structure is sleeved on the inner ring or the outer ring of the suction assembly and is provided with a middle hole through which the motor shaft can penetrate. According to the brake provided by the utility model, the sealing structure is sleeved on the outer ring or the inner ring of the suction assembly, so that the protection effect on the motor and the brake is achieved, the protection grade and performance are improved, the installation is simpler and more convenient, and the use is more flexible.

Description

Brake

Technical Field

The utility model belongs to the technical field of mechanical braking, and particularly relates to a brake.

Background

The existing thin brake is mainly applied to a joint of a cooperative robot due to the characteristic of thinness or thinness, is compact in installation structure, does not have corresponding sealing measures to protect the brake, is thin or thinness, is mostly directly nested on a motor shaft, but the direct nesting mode is not suitable, and influences the protection grade and performance of the motor and the brake.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a brake, aiming at meeting the sealing requirement of a motor in use and improving the protection grade of the motor and the brake.

In order to achieve the purpose, the utility model adopts the technical scheme that: providing a brake, which comprises a shell, a magnet exciting coil and an elastic component, wherein the magnet exciting coil and the elastic component are positioned in the shell and are coaxially arranged, the magnet exciting coil and the elastic component are respectively exposed at a first shaft end of the shell, a first installation space is formed in the shell and is respectively positioned at an inner ring of the magnet exciting coil and an inner ring of the elastic component, and the first installation space penetrates through the central position of the shell along the axial direction of the shell;

the brake further includes:

a movable plate located in the first installation space, the movable plate being slidably fitted to the housing;

the friction disc is arranged in the first installation space and is positioned on one side of the movable plate close to a second shaft end, the second shaft end is the opposite end of the first shaft end, and the friction disc is used for being connected with a motor shaft;

the armature is positioned at the second shaft end of the shell, connected with the movable plate and provided with the freedom degree for driving the movable plate to be close to or far away from the friction disc, and the armature and the shell are combined to form an attraction assembly; and

and the sealing structure is sleeved on the inner ring or the outer ring of the suction assembly and is provided with a middle hole through which the motor shaft can penetrate.

In one possible implementation manner, the sealing structure is an oil seal, and the oil seal is sleeved on the inner ring of the armature.

In some embodiments, a side of the housing facing the armature is recessed to form a mounting groove, and a portion of the oil seal is disposed in the mounting groove.

In a possible implementation manner, the sealing structure is sleeved on the inner ring of the armature, the sealing structure extends towards the first shaft end to form a shaft sleeve portion, and the shaft sleeve portion is matched with the inner ring of the friction disc to achieve synchronous rotation with the friction disc.

In some embodiments, a side of the sealing structure facing away from the first shaft end further protrudes to form a limit step, and the limit step is located on a side of the armature facing away from the housing.

In some embodiments, one side of the limiting step, which faces away from the armature, is provided with an annular first labyrinth groove, and the first labyrinth groove is used for being in rotating fit with a labyrinth ring on a motor.

In some embodiments, the first labyrinth groove is provided with a plurality of turns from inside to outside.

In one possible implementation, the sealing structure is sleeved on the outer ring of the housing, and the sealing structure includes:

the connecting part is sleeved on the outer ring of the shell; and

and the periphery of the cover shell is connected with the connecting part in an estimating way, the cover shell is arranged on one side of the armature, which faces away from the shell, and the middle hole is arranged in the cover shell.

In some embodiments, the outer ring of the housing is provided with an annular second labyrinth ring, and the inner ring of the connecting portion is provided with a second labyrinth groove which is in rotating fit with the second labyrinth ring.

In some embodiments, the second labyrinth rings are provided in plurality at intervals in the axial direction of the casing, the second labyrinth grooves are provided in plurality at intervals in the axial direction of the connecting portion, and the plurality of second labyrinth grooves correspond to the plurality of second labyrinth rings one to one.

In the embodiment of the application, compared with the prior art, the brake device is used for being installed on a motor shaft in the specific implementation, the motor shaft penetrates through a middle hole of the brake and is matched with a friction disc of the brake, the friction disc rotates along with the rotation of the motor shaft, when the motor works normally, the excitation coil is electrified to attract the armature, and the armature drives the movable plate to be far away from the friction disc; when braking is needed, the excitation coil is powered off, the elastic assembly rebounds to extrude the armature, the armature drives the movable plate to be close to the friction disc and to be extruded on the friction disc, braking is achieved through friction force between the movable plate and the friction disc, and no matter the motor works or is in a stopped state, the motor shaft penetrates through the middle hole of the sealing structure, and then protection of the motor and the brake is achieved. According to the brake, the sealing structure is sleeved on the outer ring or the inner ring of the suction assembly, so that the motor and the brake are protected, the protection grade and the performance are improved, a sealing ring is not required to be nested on a motor shaft, the installation is simpler and more convenient, and the use is more flexible.

Drawings

Fig. 1 is a schematic front view of a brake according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an exploded view of a sealing structure, an armature and a housing according to an embodiment of the present invention;

fig. 4 is a schematic front view of a brake according to a second embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

fig. 6 is a schematic perspective view of a seal structure employed in the second embodiment of the present invention;

fig. 7 is a schematic front view of a brake according to a third embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 7;

fig. 9 is an exploded view of the sealing structure and the housing used in the third embodiment of the present invention.

Description of reference numerals:

10-a housing; 11-a field coil; 12-a resilient component; 13-a first installation space; 14-mounting grooves; 15-a second labyrinth ring;

20-a movable plate;

30-a friction disk;

40-an armature;

50-a sealing structure; 51-oil seal; 52-a boss portion; 53-a limit step; 531-first labyrinth groove; 54-a connecting part; 541-a second labyrinth groove; 55-a housing;

60-shaft sleeve.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.

Referring to fig. 1 to 9 together, the brake provided by the present invention will now be described. The brake comprises a shell 10, a magnet exciting coil 11 and an elastic component 12, wherein the magnet exciting coil 11 and the elastic component 12 are located in the shell 10 and are coaxially arranged, the magnet exciting coil 11 and the elastic component 12 are respectively exposed at a first axial end of the shell 10, a first installation space 13 respectively located in inner rings of the magnet exciting coil 11 and the elastic component 12 is formed in the shell 10, and the first installation space 13 penetrates through the center of the shell 10 along the axial direction of the shell 10. The brake further includes a movable plate 20, a friction disc 30, an armature 40, and a sealing structure 50, the movable plate 20 being located in the first installation space 13, the movable plate 20 being slidably fitted to the housing 10; the friction disc 30 is arranged in the first mounting space 13 and is positioned on one side of the movable plate 20 close to a second shaft end, the second shaft end is an opposite end of the first shaft end, and the friction disc 30 is used for being connected with a motor shaft; the armature 40 is positioned at the second shaft end of the shell 10, the armature 40 is connected with the movable plate 20 and has the freedom degree of driving the movable plate 20 to be close to or far away from the friction disc 30, and the armature 40 and the shell 10 are combined to form an attraction assembly; the sealing structure 50 is sleeved on the inner ring or the outer ring of the attraction assembly and has a central hole through which the motor shaft can penetrate.

Compared with the prior art, the brake provided by the embodiment is used for being installed on a motor shaft in a specific implementation, the motor shaft penetrates through a middle hole of the brake and is matched with the friction disc 30 of the brake, the friction disc 30 rotates along with the rotation of the motor shaft, the excitation coil 11 is electrified to attract the armature 40 when the motor works normally, and the armature 40 drives the movable plate 20 to be far away from the friction disc 30; when braking is needed, the excitation coil 11 is powered off, the elastic component 12 rebounds to press the armature 40, the armature 40 drives the movable plate 20 to be close to the friction disc 30 and presses the friction disc 30, braking is achieved through friction force between the movable plate 20 and the friction disc 30, and no matter the motor works or is stopped, a motor shaft penetrates through a middle hole of the sealing structure 50, and therefore protection of the motor and the brake is achieved. According to the brake, the sealing structure 50 is sleeved on the outer ring or the inner ring of the suction assembly, so that the motor and the brake are protected, the protection level and the performance are improved, a sealing ring does not need to be additionally nested on a motor shaft, the installation is simpler and more convenient, and the use is more flexible.

In some embodiments, a specific embodiment of the above-described sealing structure 50 may be configured as shown in fig. 1-3. Referring to fig. 1 to 3, the sealing structure 50 is an oil seal 51, and the oil seal 51 is sleeved on an inner ring of the armature 40. When the motor shaft is installed, after the motor shaft penetrates through the inner ring of the shell 10 and is matched with the friction disc 30, the motor shaft also penetrates through the inner ring of the oil seal 51, and therefore the sealing protection effect is achieved; by adopting the structure of the oil seal 51, the sealing effect is excellent, and the motor can be used for a motor with extremely high requirement on the sealing effect.

In some embodiments, a modified embodiment of the oil seal 51 described above may be configured as shown in fig. 1 to 3. Referring to fig. 1 to 3, a side of the housing 10 facing the armature 40 is concavely formed with a mounting groove 14, and a portion of the oil seal 51 is placed in the mounting groove 14. When the oil seal 51 needs to ensure a certain thickness, one part of the oil seal is sleeved on the inner ring of the armature 40, and the other part of the oil seal is arranged in the mounting groove 14, so that the thickness of the armature 40 is not the same as that of the oil seal 51, and further, the thickness of the armature 40 is thinner, and the thickness of the whole brake can be reduced.

In some embodiments, a variation of the above-described seal structure 50 may be configured as shown in fig. 4-6. Referring to fig. 4 to 6, the sealing structure 50 is sleeved on the inner ring of the armature 40, the sealing structure 50 extends toward the first axial end to form a sleeve portion 52, and the sleeve portion 52 is engaged with the inner ring of the friction disc 30 to achieve synchronous rotation with the friction disc 30. When the structure is used specifically, a motor shaft penetrates through the shaft sleeve part 52 and is matched with the shaft sleeve part 52, and the sealing structure 50 is driven to rotate synchronously when the motor shaft rotates. In the case where the seal structure 50 does not include the boss portion 52, it is also necessary to separately install a boss 60 on the inner ring of the friction disc 30, and by integrating the boss 60 and the seal structure 50, the number of integral parts of the brake is reduced, facilitating installation.

In some embodiments, a modified embodiment of the seal structure 50 described above may be configured as shown in fig. 4-6. Referring to fig. 4-6, the side of the seal 50 facing away from the first axial end also protrudes to form a limit step 53, the limit step 53 being located on the side of the armature 40 facing away from the housing 10. The limiting step 53 is used for abutting against the shell of the motor, the installation of the sealing structure 50 is facilitated by the limiting step 53, the matching of the sealing structure 50 and the inner ring of the armature 40 is further guaranteed, the shaft sleeve part 52 on the sealing structure 50 corresponds to the friction disc 30, the installation is facilitated, and the installation precision is improved.

In some embodiments, a modified embodiment of the above-mentioned limit step 53 may adopt a structure as shown in fig. 4 to 6. Referring to fig. 4 to 6, an annular first labyrinth groove 531 is formed on a side of the limit step 53 facing away from the armature 40, and the first labyrinth groove 531 is configured to be rotatably engaged with a labyrinth ring on the motor. When the dustproof shell 10 of the motor is provided with the labyrinth ring structure, the dustproof shell can be matched with the first labyrinth groove 531 on the limiting step 53, and further, when the motor shaft rotates, the upper labyrinth ring of the motor rotates in the first labyrinth groove 531, so that the dustproof sealing effect is further optimized.

In some embodiments, a modified embodiment of the first labyrinth grooves 531 may be configured as shown in fig. 4 to 6. Referring to fig. 4 to 6, the first labyrinth grooves 531 are provided with a plurality of turns from the inside to the outside. Through setting up the first maze groove 531 of many circles, can improve the complex axiality between seal structure 50 and the motor for seal structure 50 optimizes the safeguard effect along with the motor shaft rotation in-process, and the cooperation is stable.

In some embodiments, a modified embodiment of the seal structure 50 described above may be configured as shown in fig. 7-9. Referring to fig. 7 to 9, the sealing structure 50 is sleeved on the outer ring of the housing 10, the sealing structure 50 includes a connecting portion 54 and a cover 55, the connecting portion 54 is sleeved on the outer ring of the housing 10, the outer periphery of the cover 55 is fixedly connected to the connecting portion 54 and covers the side of the armature 40 facing away from the housing 10, and the central hole is formed in the cover 55. In specific implementation, a motor shaft sequentially penetrates through the friction disc 30 and the middle hole of the housing 55 to play a role in dust sealing; since the armature 40 needs to reciprocate along the axial direction of the housing 10, the sealing structure 50 may be driven to move, the sealing structure 50 is connected with the housing 10, the housing 10 is fixed during the operation of the motor, and therefore the sealing structure 50 is relatively fixed, thereby optimizing the sealing effect.

It should be noted that the sealing structure 50 is fixed on the inner ring of the armature 40 or the outer ring of the housing 10, and different connection modes can be adapted to different installation requirements of the motor.

In some embodiments, an improved combination of the housing 10 and the connecting portion 54 can be as shown in fig. 7 to 9. Referring to fig. 7 to 9, the outer ring of the housing 10 is provided with an annular second labyrinth ring 15, and the inner ring of the connecting portion 54 is provided with a second labyrinth groove 541 that is rotationally engaged with the second labyrinth ring 15. The sealing structure 50 and the housing 10 are in running fit, after the sealing structure 50 is connected with a motor, the sealing structure 50 is fixed with a motor shaft and rotates along with the rotation of the motor shaft, and the dustproof sealing effect is further optimized by arranging the second labyrinth ring 15 and the second labyrinth grooves 541.

In some embodiments, a modified embodiment of the second labyrinth ring 15 and the second labyrinth grooves 541 described above may adopt a structure as shown in fig. 7 to 9. Referring to fig. 7 to 9, the second labyrinth rings 15 are provided in plurality at intervals in the axial direction of the casing 10, the second labyrinth grooves 541 are provided in plurality at intervals in the axial direction of the connecting portion 54, and the plurality of second labyrinth grooves 541 correspond to the plurality of second labyrinth rings 15 one by one. When the sealing structure 50 is specifically implemented, the sealing structure 50 is fixed with a motor shaft and rotates along with the rotation of the motor shaft, and the first labyrinth grooves 531 and the second labyrinth rings 15 are arranged for multiple circles, so that the coaxiality of the sealing structure 50 and the shell 10 can be improved, the sealing protection effect can be optimized, and the protection grade and the protection performance can be improved.

In the embodiment of the present application, in addition to the embodiment in which the seal structure 50 itself forms the boss portion 52, the inner race of the friction disk 30 in other embodiments is required to be equipped with the boss 60.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A brake comprises a shell, a magnet exciting coil and an elastic assembly, wherein the magnet exciting coil and the elastic assembly are positioned in the shell and are coaxially arranged, and both the magnet exciting coil and the elastic assembly are respectively exposed at a first shaft end of the shell;

the brake further includes:

2. The brake of claim 1, wherein the sealing structure is an oil seal, and the oil seal is sleeved on an inner ring of the armature.

3. The brake of claim 2, wherein a side of the housing facing the armature is recessed to form a mounting groove, and a portion of the oil seal is disposed in the mounting groove.

4. The brake of claim 1, wherein said seal is disposed about an inner race of said armature, said seal extending toward said first axial end to form a boss portion, said boss portion engaging said inner race of said friction disc to effect synchronous rotation therewith.

5. The brake of claim 4, wherein a side of said seal facing away from said first axial end further projects to form a limit step on a side of said armature facing away from said housing.

6. The brake of claim 5, characterized in that the side of the limit step facing away from the armature is provided with an annular first labyrinth groove for rotationally cooperating with a labyrinth ring on the motor.

7. A brake according to claim 6, characterized in that the first labyrinth groove is provided with a plurality of turns from the inside to the outside.

8. The brake of claim 1, wherein said seal is disposed about an outer race of said housing, said seal comprising:

the connecting part is sleeved on the outer ring of the shell; and

and the periphery of the cover housing is fixedly connected with the connecting part and covers one side of the armature, which faces away from the shell, and the middle hole is formed in the cover housing.

9. A brake according to claim 8, characterised in that the outer race of the housing is provided with an annular second labyrinth ring, and the inner race of the connecting part is provided with a second labyrinth groove which is in rotating engagement with the second labyrinth ring.

10. The brake of claim 9 wherein said second labyrinth rings are spaced axially along said housing, said second labyrinth grooves are spaced axially along said connecting portion, and a plurality of said second labyrinth grooves correspond one-to-one with a plurality of said second labyrinth rings.