CN216812599U

CN216812599U - Thin brake

Info

Publication number: CN216812599U
Application number: CN202220550804.9U
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 thin brake which comprises a main body, a movable plate, a friction disc, a clutch plate and a sealing structure, wherein the main body comprises a shell, an excitation coil and an elastic assembly, wherein the excitation coil and the elastic assembly are coaxially arranged in 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 clutch plate is connected with the movable plate; the sealing structure is arranged on one side of the clutch plate, which deviates from the main body, and is provided with a connecting part connected with the shaft end surface of the clutch plate. According to the thin brake provided by the utility model, the sealing structure is arranged on the clutch plate of the brake, so that the protection effect on the motor and the brake is further realized, the protection grade and performance are improved, the installation is simpler and more convenient, and the use is more flexible.

Description

Thin brake

Technical Field

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

Background

The existing thin brake is mainly applied to a joint of a cooperative robot due to the characteristic of thinness or thinness, the installation structure is compact, corresponding sealing measures are not used for protecting the brake, and most of the existing thin brakes are directly nested on a motor shaft due to the specific thinness or thinness of the brake, but the direct nesting mode is not suitable, so that the protection grade and the performance of the motor and the brake are influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a thin 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: provided is a low-profile brake including:

the main body comprises a shell, and a magnet exciting coil and an elastic component which are coaxially arranged in the shell, wherein the magnet exciting coil and the elastic component are respectively exposed at a first shaft end of the main body, the shell is provided with a first installation space 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;

a movable plate located within the first mounting space, the movable plate being slidably fitted to the main body;

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 clutch plate is positioned at the second shaft end of the main body, is connected with the movable plate and has the freedom degree of driving the movable plate to be close to or far away from the friction disc; and

and the sealing structure is arranged on one side of the clutch plate, which deviates from the main body, and is provided with a connecting part connected with the shaft end surface of the clutch plate.

In one possible implementation, the sealing structure includes:

the housing is an annular plate-shaped component and is arranged at a distance from the clutch plate, the outer ring of the housing protrudes towards the clutch plate to form the connecting part, and the housing, the connecting part and the clutch plate are enclosed to form an installation space; and

and an oil seal disposed in the installation space.

In some embodiments, the housing, the connecting portion, and the clutch plate are integrally formed, and an inner circumferential surface of the connecting portion is flush with an inner circumferential surface of the clutch plate.

In a possible implementation manner, one side of the clutch plate facing the sealing structure is provided with an annular labyrinth groove, one side of the sealing structure facing the clutch plate is provided with a labyrinth ring in rotating fit with the labyrinth groove, the labyrinth ring forms the connecting part, and the sealing structure is used for rotating along with a motor shaft.

In some embodiments, the labyrinth groove is provided with a plurality of circles coaxially from inside to outside, and the labyrinth rings correspond to the plurality of circles of labyrinth grooves one by one.

In some embodiments, the sealing structure is a polyurethane member or a rubber member.

In one possible implementation, the sealing structure includes:

the pressing plate is arranged on one side, away from the main body, of the clutch plate, and the pressing plate forms the connecting part; and

and the felt is clamped between the pressing plate and the clutch plate.

In some embodiments, a concave groove is formed on one side surface of the clutch plate close to the sealing structure, a fixing ring arranged in the groove is arranged on an outer ring of the felt in a protruding mode, and the pressing plate and the clutch plate are respectively clamped on two opposite sides of the fixing ring.

In some embodiments, the pressure plate is integrally formed with the clutch plate; or the pressing plate is detachably connected to the clutch plate.

In one possible implementation, the friction disc further comprises a bushing that is fitted to the inner race of the friction disc.

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 thin brake and is matched with a friction disc in the thin 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 clutch plate, and the clutch plate drives the movable plate to be far away from the friction disc; when needs braking, excitation coil outage, elastic component kick-backs the extrusion separation and reunion board, and the separation and reunion board drives the fly leaf and is close to the friction disk to on the friction disk, realize the braking through the frictional force between fly leaf and the friction disk, no matter the state of motor work or shut down, the motor shaft passes the mesopore of seal structure, and then realizes the protection to motor and stopper. According to the thin brake, the sealing structure is arranged on the clutch plate of the brake, 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 thin brake is simpler and more convenient to install, and the thin brake is more flexible to use.

Drawings

Fig. 1 is a schematic front view of a thin 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 clutch plate and seal arrangement employed in one embodiment of the present invention;

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

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

FIG. 6 is an exploded view of a clutch plate and seal arrangement according to a second embodiment of the present invention;

FIG. 7 is a second exploded view of a clutch plate and seal arrangement according to a second embodiment of the present invention;

fig. 8 is a schematic front view of a thin brake according to a third embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view taken along line C-C of FIG. 8;

fig. 10 is an exploded view of a clutch plate and seal structure employed in a third embodiment of the present invention.

Description of reference numerals:

10-a body; 11-a housing; 12-a field coil; 13-a resilient component; 14-a first installation space;

20-a movable plate;

30-a friction disk;

40-a clutch plate; 41-labyrinth grooves; 42-a groove;

50-a sealing structure; 51-a housing; 52-oil seal; 53-labyrinth ring; 54-a platen; 55-felt; 551-fixing ring; 56-a connecting part;

60-shaft sleeve.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, 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 are not intended to limit the utility model.

Referring to fig. 1 to 10 together, a description will now be given of a thin brake according to the present invention. The thin brake comprises a main body 10, a movable plate 20, a friction disc 30, a clutch plate 40 and a sealing structure 50, wherein the main body 10 comprises a shell 11, and an excitation coil 12 and an elastic assembly 13 which are coaxially arranged in the shell 11, the excitation coil 12 and the elastic assembly 13 are respectively exposed at a first axial end of the main body 10, a first installation space 14 respectively positioned at an inner ring of the excitation coil 12 and an inner ring of the elastic assembly 13 is formed in the shell 11, and the first installation space 14 penetrates through the central position of the shell 11 along the axial direction of the shell 11; the movable plate 20 is located in the first installation space 14, and the movable plate 20 is slidably fitted to the main body 10; the friction disc 30 is arranged in the first mounting space 14 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 clutch plate 40 is located at the second shaft end of the main body 10, the clutch plate 40 is connected with the movable plate 20 and has a degree of freedom for driving the movable plate 20 to approach or separate from the friction disc 30, the sealing structure 50 is located at a side of the clutch plate 40 facing away from the main body 10, and the sealing structure 50 has a connecting portion 56 connected with a shaft end face of the clutch plate 40.

Compared with the prior art, the thin brake provided by the embodiment is used for being installed on a motor shaft during specific implementation, the motor shaft penetrates through a middle hole of the thin brake and is matched with the friction disc 30 in the thin brake, the friction disc 30 rotates along with the rotation of the motor shaft, the excitation coil 12 is electrified to attract the clutch plate 40 during normal operation of the motor, and the clutch plate 40 drives the movable plate 20 to be far away from the friction disc 30; when braking is needed, the excitation coil 12 is powered off, the elastic assembly 13 rebounds to press the clutch plate 40, the clutch plate 40 drives the movable plate 20 to be close to the friction disc 30 and to be pressed on the friction disc 30, braking is achieved through friction force between the movable plate 20 and the friction disc 30, no matter the motor works or is in a stopped state, the motor shaft penetrates through the middle hole of the sealing structure 50, and therefore protection of the motor and the brake is achieved. According to the thin brake, the sealing structure 50 is arranged on the clutch plate 40 of the brake, so that the motor and the brake are protected, the protection level and the performance are improved, a sealing ring is not required to be nested on a motor shaft, the thin brake is simpler and more convenient to mount, and the thin brake is more flexible to use.

In some embodiments, a specific implementation of the above-described seal structure 50 may be configured as shown in fig. 1-3. Referring to fig. 1 to 3, the sealing structure 50 includes a housing 51 and an oil seal 52, the housing 51 is in an annular plate-shaped structure and is arranged at a distance from the clutch plate 40, an outer ring of the housing 51 protrudes toward the clutch plate 40 to form a connecting portion 56, and a mounting space is defined by the housing 51, the connecting portion 56 and the clutch plate 40; the oil seal 52 is disposed in the installation space. When the motor is connected, a motor shaft of the motor sequentially penetrates through the friction disc 30 and the oil seal 52, and then the dustproof sealing effect is achieved; the installation of oil blanket 52 is realized through setting up housing 51, and the structure leakproofness is good, and protection level is higher.

In some embodiments, a specific mating relationship between the housing 51 and the clutch plate 40 can be as shown in fig. 1-3. Referring to fig. 3 of the device of fig. 1, the housing 51, the connecting portion 56 and the clutch plate 40 are integrally formed, and the inner circumferential surface of the connecting portion 56 is flush with the inner circumferential surface of the clutch plate 40. The housing 51 and the clutch plate 40 are integrally formed, the oil seal 52 is firstly installed in the installation space before the brake is assembled, and then the clutch plate 40 is installed on the main body 10; the housing 51, the connecting portion 56 and the clutch plate 40 are integrally formed, integrity is improved, mounting is facilitated, and reliability in fixing the oil seal 52 can be ensured.

In some embodiments, a variation of the above-described seal structure 50 may be configured as shown in fig. 4-7. Referring to fig. 4 to 7, a side of the clutch plate 40 facing the sealing structure 50 is provided with an annular labyrinth groove 41, a side of the sealing structure 50 facing the clutch plate 40 is provided with a labyrinth ring 53 rotatably engaged with the labyrinth groove 41, the labyrinth ring 53 forms a connecting portion 56, and the sealing structure 50 is adapted to rotate with the motor shaft. When the motor shaft is rotated, the labyrinth ring 53 of the sealing structure 50 is rotated in the labyrinth groove 41 of the clutch plate 40, thereby achieving a protection effect for the motor and the brake.

In some embodiments, a modified embodiment of the labyrinth ring 53 and the labyrinth groove 41 may be configured as shown in fig. 4 to 7. Referring to fig. 4 to 7, the labyrinth grooves 41 are coaxially provided with a plurality of circles from inside to outside, and the labyrinth rings 53 correspond to the plurality of circles of labyrinth grooves 41 one by one. By increasing the number of the labyrinth grooves 41 and the labyrinth rings 53 matched with the labyrinth grooves, the coaxiality between the sealing structure 50 and the clutch plate 40 is improved, so that the sealing structure 50 is enabled to optimize the protection effect in the process of rotating along with the motor shaft, and the matching is stable.

In some embodiments, the labyrinth ring 53 may be formed on the sealing structure 50, and the sealing structure 50 may be made of a polyurethane member or a rubber member. Because the sealing structure 50 needs to rotate along with the motor shaft, a polyurethane member or a rubber member is adopted, so that certain structural strength can be ensured, certain elasticity is also provided for adapting to vibration in the rotating process, and noise is reduced while the sealing effect is optimized.

In some embodiments, a modified embodiment of the seal structure 50 described above may be configured as shown in fig. 8-10. Referring to fig. 8 to 10, the sealing structure 50 includes a pressing plate 54 and a felt 55, the pressing plate 54 is disposed on a side of the clutch plate 40 facing away from the main body 10, and the pressing plate 54 forms a connecting portion 56; felt 55 is sandwiched between pressure plate 54 and clutch plate 40. When the motor shaft is connected with the thin brake of the utility model, the motor shaft passes through the middle hole of the friction disc 30 and then passes through the middle hole of the felt 55, thus playing the role of dust-proof sealing; the felt 55 is clamped on two sides through the matching between the pressing plate 54 and the clutch plate 40, so that the structure is simple, the operation is convenient, and the labor intensity is reduced; and the felt 55 is low cost and easy to replace.

In some embodiments, an improved engagement of the clutch plate 40, pressure plate 54, and felt 55 may be configured as shown in fig. 8-10. Referring to fig. 8 to 10, a side surface of the clutch plate 40 close to the sealing structure 50 is recessed to form a groove 42, an outer ring of the felt 55 is protruded to form a fixing ring 551 disposed in the groove 42, and the pressing plate 54 and the clutch plate 40 are respectively clamped on opposite sides of the fixing ring 551. Through being equipped with recess 42 on the clutch plate 40, and then when placing felt 55 for the solid fixed ring 551 on the felt 55 is placed in the recess 42 can, make things convenient for the installation of felt 55, and can guarantee the axiality of felt 55 and clutch plate 40, then it can to fix through clamp plate 54.

It will be appreciated that the retaining ring 551 is of the same material as the felt 55.

In some embodiments, one particular connection of pressure plate 54 to clutch plate 40 may be as shown in FIGS. 8-10. Referring to fig. 8-10, pressure plate 54 is integrally formed with clutch plate 40; alternatively, pressure plate 54 may be removably coupled to clutch plate 40. The felt 55 is convenient to replace under the condition that the pressing plate 54 is detachable; under the condition that the pressing plate 54 and the clutch plate 40 are integrally formed, the falling off caused by vibration during working can be prevented, so that the fixing effect of the felt 55 is ensured, and the falling off of the felt 55 is prevented.

In some embodiments, a modified embodiment of the thin brake described above may be configured as shown in fig. 1-10. Referring to fig. 1-10, a bushing 60 is also included, the bushing 60 engaging the inner race of the friction disc 30. Optionally, the shaft sleeve 60 and the friction disc 30 may be in spline fit, and are packaged separately during transportation, and when the shaft sleeve 60 needs to be connected to a motor, the shaft sleeve 60 is installed at the inner ring of the friction disc 30, so that the motor shaft sequentially passes through the shaft sleeve 60 and the middle hole of the sealing structure 50, and a dustproof sealing effect is achieved.

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 low profile brake, comprising:

the main body comprises a shell, and a magnet exciting coil and an elastic assembly which are coaxially arranged in the shell, wherein the magnet exciting coil and the elastic assembly are respectively exposed at a first shaft end of the main body, the shell is provided with a first installation space respectively positioned in an inner ring of the magnet exciting coil and the elastic assembly, and the first installation space penetrates through the central position of the shell along the axial direction of the shell;

2. The low-profile brake of claim 1, wherein the seal structure comprises:

and an oil seal disposed in the installation space.

3. The thin brake of claim 2, wherein the housing, the connecting portion, and the clutch plate are integrally formed, and an inner circumferential surface of the connecting portion is flush with an inner circumferential surface of the clutch plate.

4. The low-profile brake of claim 1, wherein a side of the clutch plate facing the seal structure is provided with an annular labyrinth groove, and a side of the seal structure facing the clutch plate is provided with a labyrinth ring rotatably engaged with the labyrinth groove, the labyrinth ring forming the connecting portion, the seal structure being adapted to rotate with the motor shaft.

5. The thin brake as defined in claim 4, wherein said labyrinth grooves are provided with a plurality of turns from inside to outside coaxially, and said labyrinth rings correspond to said plurality of turns of said labyrinth grooves one by one.

6. The low-profile brake of claim 4, wherein the sealing structure is a polyurethane member or a rubber member.

7. The low-profile brake of claim 1, wherein the sealing structure comprises:

and the felt is clamped between the pressing plate and the clutch plate.

8. The thin brake as claimed in claim 7, wherein a side of the clutch plate adjacent to the sealing structure is recessed to form a groove, a fixing ring disposed in the groove is protruded from an outer ring of the felt, and the pressing plate and the clutch plate are respectively clamped to opposite sides of the fixing ring.

9. The low profile brake of claim 7 or 8, wherein the pressure plate is integrally formed with the clutch plate; or the pressing plate is detachably connected to the clutch plate.

10. The low profile brake of claim 1, further comprising a bushing, said bushing engaging an inner race of said friction disc.