阅读说明：本技术 摩擦片组件、制动器和电机 (Friction plate assembly, brake and motor ) 是由 杨�一 车礼超 邱克难 于 2019-09-24 设计创作，主要内容包括：本发明提供一种摩擦片组件、制动器和电机。摩擦片组件包括第一弹性件以及同轴设置的第一摩擦片和第二摩擦片,第一弹性件位于第一摩擦片与第二摩擦片之间,第一弹性件的恢复力迫使第一摩擦片与第二摩擦片相互远离。该摩擦片组件具有较大自由度,可提升运转平衡性,具有该摩擦片组件的制动器能够快速响应,同时提升运转平衡性,避免异常磨损。(The invention provides a friction plate assembly, a brake and a motor. The friction plate assembly comprises a first elastic piece, a first friction plate and a second friction plate, wherein the first friction plate and the second friction plate are coaxially arranged, the first elastic piece is located between the first friction plate and the second friction plate, and the first friction plate and the second friction plate are forced to be away from each other by restoring force of the first elastic piece. The friction plate assembly has a large degree of freedom, the running balance can be improved, the brake with the friction plate assembly can quickly respond, the running balance is improved, and abnormal abrasion is avoided.)

1. The friction plate assembly is characterized by comprising a first elastic piece, a first friction plate and a second friction plate which are coaxially arranged;

the first elastic piece is located between the first friction plate and the second friction plate, and restoring force of the first elastic piece forces the first friction plate and the second friction plate to be away from each other.

2. A friction plate assembly as described in claim 1 wherein:

the friction plate assembly further comprises a first reinforcing lining plate and a second reinforcing lining plate, and the first reinforcing lining plate and the second reinforcing lining plate are located between the first friction plate and the second friction plate;

the first reinforcing lining plate is fixedly connected with the first friction plate, and the second reinforcing lining plate is fixedly connected with the second friction plate.

3. A friction plate assembly as described in claim 2 wherein:

a first positioning groove is formed between the first reinforcing lining plate and the second reinforcing lining plate, and the first elastic piece is installed in the first positioning groove.

4. A friction plate assembly as described in claim 2 wherein:

the first reinforcing lining plate is fixedly connected with the first friction plate through a bonding process or a thermoplastic process.

5. The friction plate assembly of any one of claims 2 to 4, wherein:

the first reinforcing liner plate is made of stainless steel material.

6. The friction plate assembly of any one of claims 2 to 4, wherein:

the first friction plate, the first reinforcing lining plate, the first elastic piece, the second reinforcing lining plate and the second friction plate are all in a circular ring shape and are coaxially arranged.

7. A friction plate assembly as described in claim 6 wherein:

the friction plate assembly further comprises an axial limiting part, the first friction plate, the first elastic part and the second friction plate are connected through the axial limiting part, and the axial limiting part limits axial displacement of the first friction plate relative to the second friction plate in the axial direction of the first friction plate.

8. The friction plate assembly of claim 7, wherein:

the axial limiting piece comprises a bolt and a nut, the bolt comprises a head and a rod, the rod extends along the axial direction of the first friction plate, the head is located at the first end of the rod, and the nut is installed at the second end of the rod;

the rod portion sequentially penetrates through the first friction plate, the first reinforcing lining plate, the first elastic member, the second reinforcing lining plate and the second friction plate, the first friction plate can move along the rod portion of the bolt relative to the second friction plate, and the first friction plate and the second friction plate are limited between the head portion and the nut.

9. The friction plate assembly of claim 7, wherein:

the first friction plate comprises a first friction surface which is arranged opposite to the second friction plate, the second friction plate comprises a second friction surface which is arranged opposite to the first friction plate, and two end parts of the axial limiting part are both located between the first friction surface and the second friction surface.

10. The friction plate assembly of any one of claims 1 to 4, wherein:

the first elastic piece is a plate spring, a spring washer or a wave washer.

11. A brake including a friction plate assembly as claimed in any one of claims 1 to 10.

12. The brake of claim 11, wherein:

the stopper still includes square wheel and second elastic component, the friction disc subassembly is provided with the mounting hole along the axial with running through, the square wheel is installed in the mounting hole, be provided with spacing portion on the periphery wall of square wheel, the second constant head tank has been seted up on the periphery wall of mounting hole, the second elastic component is located in the second constant head tank, the first end of second elastic component is connected in spacing portion, the second end of second elastic component is connected on the inner wall of second constant head tank.

13. The brake of claim 12, wherein:

the limiting part is provided with a first positioning column, the inner wall of the second positioning groove is provided with a second positioning column, and two ends of the second elastic piece are respectively sleeved on the first positioning column and the second positioning column.

14. An electrical machine comprising a brake as claimed in any one of claims 11 to 13.

Technical Field

The invention relates to the technical field of brakes, in particular to a friction plate assembly, a brake and a motor.

Background

The brake is an important basic part, integrates mechanical, electrical and electronic technologies, and is mainly used for the precise control and braking of rotating mechanisms such as motors and the like. The brake is installed in servo motor, and servo motor during operation, if the response time of brake is long, and the response time of brake is greater than the response time of motor, then the motor starts, and the brake does not start, can cause the unusual wearing and tearing of brake, and the brake is inefficacy, produces the potential safety hazard. Meanwhile, as the friction plate is made of a non-rigid material, the friction plate can rotate for several circles in the braking process, friction does work until braking is completed, and in the process, the position of a rotating shaft of the motor is changed due to the fact that the friction plate deflects to an angle, so that the precision of equipment is affected, and serious potential safety hazards are caused to the equipment and operators.

Referring to fig. 1 and 2, the conventional brake includes a stator 11, a friction plate 12, a baffle 13, a square wheel 14, an armature 15, and a spring 16, wherein one end of the spring 16 abuts against the stator 11, the other end abuts against the armature 15, the friction plate 12 is installed between the armature 15 and the baffle 13, a gap is left between the armature 15 and the stator 11, and the square wheel 14 and the friction plate 12 are relatively fixed in the circumferential direction.

The coil 111 on the stator 11 is energized, the stator 11 generates electromagnetic force, the armature 15 is attracted to the stator 11 until the gap between the armature 15 and the stator 11 is zero, and the spring 16 is stressed in a compressed state. The square wheel 14 and the friction plate 12 are driven to rotate by the rotating shaft of the motor.

The coil 111 on the stator 11 is de-energized, the stator 11 loses electromagnetic force, and the elastic restoring force of the spring 16 pushes the armature 15 away from the stator 11 and presses the armature 15 and the friction plate 12 against the damper 13. The friction plate 12 is clamped between the armature 15 and the baffle 13 for braking, the friction force generated between the friction plate 12 and the armature 15 and the baffle 13 is also called braking force, and the square wheel 14 stops rotating under the action of the braking force and drives the rotating shaft of the motor to stop rotating at the same time. The greater the force of the spring 16 at this time, the greater the braking torque generated. However, when the electromagnetic force generated by the stator 11 is not large enough, the excessive force of the spring 16 may cause the overall response time of the brake to be long. Meanwhile, the friction plate 12 may deflect due to size problems during operation, friction with the armature 15 and the baffle 13 cannot be avoided during deflection, abnormal abrasion is generated besides noise, and when the friction plate 12 is abraded to a certain degree, the brake performance of the brake fails.

Disclosure of Invention

A first object of the present invention is to provide a friction plate assembly having a greater degree of freedom and improved running balance.

A second object of the present invention is to provide a brake capable of quick response, while improving running balance and avoiding abnormal wear.

A third object of the invention is to provide an electric machine with a brake as described above.

In order to achieve the first object, the friction plate assembly provided by the invention comprises a first elastic member, and a first friction plate and a second friction plate which are coaxially arranged, wherein the first elastic member is located between the first friction plate and the second friction plate, and the first friction plate and the second friction plate are forced to be away from each other by the restoring force of the first elastic member.

According to the scheme, the first elastic piece is arranged between the first friction piece and the second friction piece, so that the flexibility of the friction piece assembly can be increased, the friction piece assembly can be self-adjusted, abnormal abrasion caused by deflection of the friction piece assembly in the working process is reduced, and the reliability of the brake is improved.

Preferably, the friction plate assembly further comprises a first reinforcing lining plate and a second reinforcing lining plate, and the first reinforcing lining plate and the second reinforcing lining plate are located between the first friction plate and the second friction plate. The first reinforcing lining plate is fixedly connected with the first friction plate, and the second reinforcing lining plate is fixedly connected with the second friction plate.

It follows that the reinforcing backing plate can improve the structural strength of the friction plate assembly.

Still further scheme is, seted up first constant head tank between first enhancement welt and the second enhancement welt, and first elastic component is installed in first constant head tank.

Therefore, the first positioning groove can accurately position the first elastic piece, and the first elastic piece is prevented from moving.

In a further scheme, the first reinforcing lining plate is fixedly connected with the first friction plate through a bonding process or a thermoplastic process.

Preferably, the first reinforcing liner is made of a stainless steel material.

Preferably, the first friction plate, the first reinforcing lining plate, the first elastic member, the second reinforcing lining plate and the second friction plate are all annular and coaxially arranged.

The friction plate assembly further comprises an axial limiting piece, the first friction plate, the first elastic piece and the second friction plate are connected through the axial limiting piece, and the axial limiting piece limits axial displacement of the first friction plate relative to the second friction plate in the axial direction of the first friction plate. Preferably, the axial stopper includes a bolt and a nut, the bolt includes a head portion and a rod portion, the rod portion extends in the axial direction of the first friction plate, the head portion is located at a first end of the rod portion, and the nut is mounted at a second end of the rod portion. The rod portion sequentially penetrates through the first friction plate, the first reinforcing lining plate, the first elastic piece, the second reinforcing lining plate and the second friction plate, the first friction plate can move along the rod portion of the bolt relative to the second friction plate, and the first friction plate and the second friction plate are limited between the head portion and the nut.

The axial limiting piece comprises a first friction surface and a second friction surface, wherein the first friction surface is arranged opposite to the second friction surface, the second friction surface is arranged opposite to the first friction surface, and two end parts of the axial limiting piece are located between the first friction surface and the second friction surface.

Therefore, both ends of the axial limiting piece do not protrude outwards from the first friction surface and the second friction surface, and therefore the axial limiting piece is prevented from being abraded.

Preferably, the first elastic member is a plate spring, a spring washer or a wave washer.

To achieve the second objective, the present invention provides a brake including the above-mentioned friction plate assembly.

According to the scheme, after the coil on the stator is electrified, the stator generates electromagnetic force to attract the armature to be close to the stator, under the action of the restoring force of the first elastic piece, the restoring force of the first elastic piece forces the first friction piece and the second friction piece to be away from each other, the first friction piece applies acting force to the armature, the moving speed of the armature to the stator can be increased, and therefore a spring with smaller spring force can be adopted. Meanwhile, after the spring with smaller spring force is adopted, the ratio of the electromagnetic force to the spring force is changed, the electromagnetic force is far greater than the spring force, the armature can be attracted quickly, and the response time of the brake is greatly prolonged. Therefore, the electromagnetic force of the stator in the existing brake can be reduced, and the coil on the stator can be optimized due to the great reduction of the electromagnetic force, so that the overall power of the brake is reduced, the overall size of the brake is reduced, and the performance of the brake is greatly optimized.

According to a preferable scheme, the brake further comprises a square wheel and a second elastic piece, the friction piece assembly is provided with a mounting hole in an axially penetrating mode, the square wheel is mounted in the mounting hole, a limiting portion is arranged on the outer peripheral wall of the square wheel, a second positioning groove is formed in the peripheral wall of the mounting hole, the second elastic piece is located in the second positioning groove, the first end of the second elastic piece is connected to the limiting portion, and the second end of the second elastic piece is connected to the inner wall of the second positioning groove.

It can be seen that the second resilient member can increase the flexibility between the friction plate assembly and the square wheel assembly. Reduce the noise that the motor operation produced, avoid unusual wearing and tearing.

The friction plate assembly is stressed in a balanced manner in the rotation process of the same square wheel, and the recoil spring serving as the second elastic piece is not compressed or stretched. When the brake is used for braking, the motor cannot stop instantly due to load inertia, the friction plate assembly needs to continuously rub to apply work and slowly stops, in the process, the armature iron extrudes the friction plate assembly and continuously performs rotary friction work in one direction, meanwhile, the recoil spring is subjected to pressure generated when the recoil spring applies work to generate recoil elasticity in the same direction as the friction force, and the recoil elasticity and the friction force are simultaneously applied to the friction plate assembly, so that the work applying efficiency of the brake in the same time period is improved, the actual braking time is reduced, and the precision and the reliability of the equipment are improved.

The further scheme is that a first positioning column is arranged on the limiting part, a second positioning column is arranged on the inner wall of the second positioning groove, and two ends of the second elastic piece are respectively sleeved on the first positioning column and the second positioning column.

In order to achieve the third object, the present invention provides an electric machine including the brake.

Drawings

Fig. 1 is a perspective view of a conventional brake.

Fig. 2 is a sectional view of a conventional brake.

Fig. 3 is a cross-sectional view of a brake embodiment of the present invention.

FIG. 4 is a cross-sectional view of a friction plate assembly in a brake embodiment of the present invention.

Fig. 5 is a partially enlarged view of a portion a in fig. 4.

Fig. 6 is a structural view of a first elastic member in the brake embodiment of the present invention.

Fig. 7 is a front view of an embodiment of the brake of the present invention.

FIG. 8 is a block diagram of a reinforcing backing plate in an embodiment of the brake of the present invention.

Fig. 9 is a structural view of a square wheel in the brake embodiment of the present invention.

The invention is further explained with reference to the drawings and the embodiments.

Detailed Description

The motor of the present embodiment includes a brake and a motor shaft.

Referring to fig. 3, the brake includes a stator 2, a friction plate assembly 3, an armature 4, a square wheel 5, a baffle 6, a second elastic member 7 (shown in fig. 6), and a spring 8. One side of baffle 6 is provided with spliced pole 61, the one end and the baffle 6 fixed connection of spliced pole 61, the other end and the stator 2 fixed connection of spliced pole 61, armature 4 cover is established on spliced pole 61, and armature 4 can slide along the extending direction of spliced pole 61, and friction disc subassembly 3 installs between armature 4 and baffle 6. Be equipped with shaft hole 23 on the stator 2, be provided with fixed orifices 53 on the square wheel 5, fixed orifices 53 and shaft hole 23 coaxial setting, the motor shaft passes shaft hole 23 and fixed orifices 53 in proper order to motor shaft and fixed orifices 53 fixed connection.

A plurality of spring mounting grooves 21 are formed at an axial end of the stator 2, the plurality of spring mounting grooves 21 are arranged along the circumferential direction of the stator 2, the spring 8 is mounted in the spring mounting groove 21, two ends of the spring 8 respectively abut against the armature 4 and the spring mounting grooves 21, and the restoring force of the spring 8 can force the armature 4 to be away from the stator 2 along the axial direction of the stator 2 and form a gap between the armature 4 and the stator 2, wherein the gap preferably has a width in a range of 0.05 cm to 0.15 cm.

Referring to fig. 4 to 6, the friction plate assembly 3 includes an axial stopper 36, and a first friction plate 32, a first reinforcing backing plate 33, a first elastic member 31, a second reinforcing backing plate 34, and a second friction plate 35, which are arranged in this order in the axial direction. The first friction plate 32 is arranged close to the armature 4, the second friction plate 35 is arranged close to the baffle 6, and the first elastic piece 31, the first friction plate 32, the first reinforcing lining plate 33, the second reinforcing lining plate 34 and the second friction plate 35 are all in a circular ring shape and are coaxially arranged. The first reinforcing liner 33 is fixedly connected to the first friction plate 32 by a bonding process or a thermoplastic process, and the second reinforcing liner 34 is fixedly connected to the second friction plate 35 by a bonding process or a thermoplastic process. The first elastic member 31 may be a component having an elastic function, such as a plate spring, a spring washer, or a wave washer.

The first reinforcing lining plate 33 and the second reinforcing lining plate 34 are both made of metal materials such as stainless steel, a first groove 331 is formed in the surface, opposite to the second reinforcing lining plate 34, of the first reinforcing lining plate 33, a second groove 341 is formed in the surface, opposite to the first reinforcing lining plate 33, of the second reinforcing lining plate 34, the first groove 331 and the second groove 341 are arranged oppositely, a first positioning groove 330 is formed by the first groove 331 and the second groove 341 together, the first elastic piece 31 is installed in the first positioning groove 330, and the first friction piece 32 and the second friction piece 35 are forced to be away from each other by the restoring force of the first elastic piece 31.

The axial stopper 36 serves to restrict the displacement of the first friction plate 32 relative to the second friction plate 35 in the axial direction of the friction plate assembly 3. The axial stop 36 includes a bolt 361 and a nut 362, the bolt 361 including a head portion 363 and a shaft portion 364, the shaft portion 364 extending in the axial direction of the friction plate assembly 3, the head portion 363 being located at a first end of the shaft portion 364, and the nut 362 being mounted at a second end of the shaft portion 364. The number of the axial stoppers 36 is four, and the four axial stoppers 36 are uniformly arranged along the circumferential direction of the first friction plate 32.

The second friction plate 35 is provided with four first through holes 351, the second reinforcing lining plate 34 is provided with four second through holes 342, the first elastic member 31 is provided with four third through holes 311 matched with the rod portion 364, the first reinforcing lining plate 33 is provided with four fourth through holes 332, and the first friction plate 32 is also provided with four fifth through holes 321. The first through hole 351, the second through hole 342, the third through hole 311, the fourth through hole 332, and the fifth through hole 321 are coaxially disposed. A rod 364 passes through a first through hole 351, a second through hole 342, a third through hole 311, a fourth through hole 332 and a fifth through hole 321 in sequence and then is fixedly connected with a nut 362. The first friction plate 32 is movable relative to the second friction plate 35 along the shaft portion 364 of the bolt 361, and the first friction plate 32, the first reinforcing liner 33, the first elastic member 31, the second reinforcing liner 34, and the second friction plate 35 are restrained between the head portion 363 and the nut 362.

The first friction plate 32 includes a first friction surface 322 facing away from the second friction plate 33, the second friction plate 35 includes a second friction surface 352 facing away from the first friction plate 32, the length of the bolt 361 is smaller than the distance between the first friction surface 322 and the second friction surface 352, and both ends of the axial direction limiting member 36 are located between the first friction surface 322 and the second friction surface 352.

Referring to fig. 3, 7 to 9, the friction plate assembly 3 is provided with a mounting hole 30 penetrating in the axial direction, the cross section of the mounting hole 30 and the cross section of the square wheel 5 are both substantially square, the square wheel 5 is mounted in the mounting hole 30, and the outer peripheral wall of the square wheel 5 is abutted with a first reinforcing lining plate 33 and a second reinforcing lining plate 34. A small movable gap is formed between the square wheel 5 and the inner peripheral wall of the mounting hole 30, so that the square wheel 5 can rotate slightly relative to the friction assembly 3, the flexibility between the friction assembly and the square wheel assembly is increased, and the running noise and abnormal wear are reduced.

The outer peripheral wall of the square wheel 5 is provided with four limiting portions 51, the four limiting portions 51 are respectively and uniformly arranged along the outer peripheral wall of the square wheel 5, the four limiting portions 51 are respectively arranged on four side walls 53, 54, 55 and 56 of the square wheel 5, the mounting hole 30 comprises a through hole 300 which penetrates through the second reinforcing lining plate 34 along the axial direction of the first friction plate 32, four second positioning grooves 301 are formed in the peripheral wall of the through hole 300, each second positioning groove 301 comprises a first side wall 303 and a second side wall 304 which are oppositely arranged, one limiting portion 51 extends into one second positioning groove 301, the limiting portion 51 is arranged close to the first side wall 303 of the second positioning groove 301, a first positioning column 52 is arranged on the limiting portion 51, a second positioning column 302 is arranged on the second side wall 304 of the second positioning groove 301, and the second elastic piece 7 is located in the second positioning groove 301. The structure of the first reinforcing lining plate 33 is the same as that of the second reinforcing lining plate 34, one end of the second elastic member 7 is sleeved on the first positioning column 52 of the square wheel 5, and the other end of the elastic member 7 is sleeved on the second positioning column of the first reinforcing lining plate 33 and the second positioning column of the second reinforcing lining plate 34.

The coil 22 on the stator 2 is de-energized and the stator 2 loses its electromagnetic force and the elastic restoring force of the spring 8 pushes the armature 4 away from the stator 2 and presses the armature 4 and the friction plate assembly 3 against the back plate 6. At this time, the first friction plate 32 moves towards the second friction plate 35, the second friction plate 35 abuts against the baffle 6, the first elastic member 31 is stressed and compressed, meanwhile, the first elastic member 31 has reaction force to both the first friction plate 32 and the second friction plate 35, and the reaction force enables the first friction plate 32 and the armature 4 to generate friction force on one hand and enables the second friction plate 35 and the baffle 6 to generate friction force on the other hand, so that compared with the friction plates in the prior art, the friction assembly with the first elastic member 31 can generate larger friction force, namely can generate larger braking torque, and therefore, the spring 8 with smaller spring force can be adopted.

After the coil 22 on the stator 2 is energized, the stator 2 generates electromagnetic force to attract the armature 4 to approach the stator 2, and under the restoring force of the first elastic member 31, the restoring force of the first elastic member 31 forces the first friction plate 32 and the second friction plate 35 to move away from each other, and the first friction plate 32 applies acting force to the armature 4, so that the speed of moving the armature 4 to the stator 2 can be increased. Meanwhile, after the spring 8 with smaller spring force is adopted, the ratio of the electromagnetic force to the spring force is changed, the electromagnetic force is far greater than the spring force, the armature 4 can be attracted quickly, and the response time of the brake is greatly prolonged. Therefore, the electromagnetic force of the stator 2 in the conventional brake can be reduced, and the coil 22 on the stator 2 can be optimized due to the great reduction of the electromagnetic force, so that the overall power of the brake can be reduced, and the overall size of the brake can be reduced, thereby greatly optimizing the performance of the brake.

In addition, first friction disc also can include reinforcing plate and the friction portion of cladding outside the reinforcing plate, and the reinforcing plate is wrapped up in the friction portion completely, and the reinforcing plate is made by metal materials such as stainless steel, and the second friction disc is unanimous with first friction disc structure, like this, need not to set up first enhancement welt and second enhancement welt, also can improve the intensity of first friction disc and second friction disc. The axial limiting member may also comprise a stud and two nuts detachably mounted at both ends of the stud. The number of the second elastic members, the number of the axial limiting members and the like can also be changed according to actual needs. The above-described modifications also achieve the object of the present invention.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, not limitations, and various changes and modifications may be made by those skilled in the art, without departing from the spirit and scope of the invention, and any changes, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be embraced therein.