CN216343575U

CN216343575U - Brake noise reduction structure and brake

Info

Publication number: CN216343575U
Application number: CN202123060094.6U
Authority: CN
Inventors: 吴孔建; 蓝刚勇; 鲁查; 叶逸祥
Original assignee: Aochuang Power Transmission Shenzhen Co ltd
Current assignee: Aochuang Power Transmission Shenzhen Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-04-19
Anticipated expiration: 2031-12-06

Abstract

The utility model provides a brake noise reduction structure and a brake, wherein the brake noise reduction structure comprises a shaft sleeve, a friction disc and an elastic piece, the friction disc is sleeved on the periphery of the shaft sleeve and can rotate along with the shaft sleeve, and a mounting part is arranged on the friction disc; the elastic part is arranged on the mounting part, the elastic part is provided with a contact part which can be contacted with the outer peripheral surface of the shaft sleeve along the radial direction of the friction disc, and the elastic part is provided with a pretightening force which enables the contact part to be close to the center of the friction disc. The brake comprises the brake noise reduction structure. The brake noise reduction structure and the brake provided by the utility model prevent the friction force between the shaft sleeve and the friction disc from increasing, and are convenient to install; the stable cooperation between axle sleeve and the friction disk realizes making an uproar.

Description

Brake noise reduction structure and brake

Technical Field

The utility model belongs to the technical field of brakes, and particularly relates to a brake noise reduction structure and a brake.

Background

The shaft sleeve in the brake is matched with the shaft, wherein the shaft sleeve in the brake is matched with the friction disc, the friction disc is driven to rotate when the shaft rotates, and the shaft is braked and decelerated through the friction disc, so that the braking effect on the shaft is achieved.

Generally, no noise reduction measures are taken in a matching structure between the shaft sleeve and the friction disc, so that when the brake is in use, namely the shaft sleeve or the shaft drives the friction disc to rotate, the rotation speed of the shaft sleeve and the friction disc is inconsistent due to the hysteresis characteristic of the friction disc, and noise is inevitably generated. In the traditional noise measure, a groove is formed in a shaft sleeve, and an O-shaped ring is sleeved in the groove, so that the noise can be reduced, but the following adverse effects can be brought;

(1) when the 0-shaped ring and the shaft sleeve are installed, the inner circumferential surface of the friction disc can shear the 0-shaped ring, and in severe cases, the outer surface of the O-shaped ring can be damaged, so that the friction force between the shaft sleeve and the friction disc is increased, and the installation difficulty is increased;

(2) in order to enhance the noise-proof effect, the size of the O-shaped ring cannot be too small, which means that the width of the O-shaped ring groove on the shaft sleeve cannot be too small, so that the 0-shaped ring can be fully contacted with the friction disc, and the actual contact area between the shaft sleeve and the friction disc is reduced;

(3) in order to take into account the torque transmission, the axial length of the friction disk in contact with the shaft sleeve is sufficient, and the thickness of the friction disk and the thickness of the shaft sleeve must be increased simultaneously, so that the part cost is increased.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a brake noise reduction structure and a brake, aiming at reducing the noise of the brake during working, reducing the installation difficulty and not influencing the matching reliability between a shaft sleeve and a friction disc.

In a first aspect, an embodiment of the present invention provides a brake noise reduction structure, including:

a shaft sleeve;

the friction disc is sleeved on the periphery of the shaft sleeve and can rotate along with the shaft sleeve, and a mounting part is arranged on the friction disc; and

the elastic piece is arranged on the mounting part and provided with a contact part which can be contacted with the outer peripheral surface of the shaft sleeve along the radial direction of the friction disc, and the elastic piece is provided with a pretightening force which enables the contact part to be close to the center of the friction disc.

Compared with the prior art, the scheme shown in the embodiment of the application has the following advantages:

(1) the elastic piece is arranged on the friction disc, so that the friction disc and the elastic piece are in a special shape, the fool-proof effect is achieved, and the assembly between the friction disc and the shaft sleeve is facilitated; and the elastic part can reduce the abrasion of the outer periphery of the shaft sleeve to the elastic part, prevent the friction force between the shaft sleeve and the friction disc from increasing, and is convenient to install.

(2) During actual installation, the elastic piece is firstly extruded, the friction disc is sleeved on the periphery of the shaft sleeve, and after the elastic piece is loosened, the elastic piece is automatically abutted against the peripheral surface of the shaft sleeve, so that stable matching between the shaft sleeve and the friction disc is realized, the hysteresis effect of the friction disc is reduced, and noise reduction is realized.

(3) Different from the whole sleeve of the O-shaped ring, the elastic piece is arranged on the friction disc, so that the matching length of the shaft sleeve and the friction disc in the axial direction is ensured, and the shaft sleeve is ensured to be fully contacted with the friction disc.

With reference to the first aspect, in a possible implementation manner, a fastening member for connecting with a shaft is disposed on the shaft sleeve, and the elastic member can be disposed to cover an end of the fastening member away from the center of the shaft sleeve.

With reference to the first aspect, in one possible implementation manner, the mounting portion is a mounting platform, and an abutting plane corresponding to the mounting platform is formed on an outer peripheral surface of the shaft sleeve.

In some embodiments, the shaft sleeve is engaged with the friction disc teeth, the friction disc is formed with a tooth notch, a side surface of the tooth notch facing the center of the friction disc forms the mounting platform, and the abutting plane is placed in the tooth notch.

In some embodiments, the mounting platforms are uniformly distributed around the axis of the friction disc, and the abutting planes correspond to the mounting platforms one to one.

With reference to the first aspect, in a possible implementation manner, the elastic element is a spring plate, two ends of the spring plate are bent to form clamping arms, the two clamping arms are respectively clamped at two sides of the mounting portion, and a middle portion of the spring plate is raised toward a center of the friction disc to form the abutting portion.

With reference to the first aspect, in one possible implementation manner, the mounting portion has an accommodating cavity extending in a radial direction of the friction disc and opening inward, and the elastic member includes:

the spring is arranged in the accommodating cavity, and one end of the spring abuts against the bottom of the accommodating cavity; and

and the top block is arranged at the other end of the spring and protrudes out of the inner circumferential surface of the friction disc, and the top block forms the abutting part.

In some embodiments, the top block is a sphere, the spring abuts against the top block, a closing part is arranged at an opening of the accommodating cavity, and the inner diameter of the closing part is smaller than the diameter of the sphere.

With reference to the first aspect, in a possible implementation manner, a clamping groove is formed in the mounting portion, the elastic element is a top pin embedded in the clamping groove, the top pin is an elastic member, and one end of the top pin extends out of an inner circumferential surface of the friction disc to form the abutting portion.

In a second aspect, an embodiment of the present invention further provides a brake, including the above brake noise reduction structure.

Drawings

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

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

fig. 3 is an exploded view of a noise reduction structure of a brake according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structural diagram (the same as the view in fig. 2) of a noise reduction structure of a brake according to a second embodiment of the present invention;

fig. 5 is a schematic front view of a noise reduction structure of a brake according to a third embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view taken along line B-B of FIG. 5;

fig. 7 is an exploded schematic view of a noise reduction structure of a brake according to a third embodiment of the present invention.

Description of reference numerals:

10-shaft sleeve; 11-a fastener; 12-an abutment plane; 13-a mating surface;

20-a friction disk; 21-a containing cavity; 211-a mouth-piece; 22-a clamping groove; 23-clamping position; 24-a mounting platform;

30-an elastic member; 31-a spring plate; 32-a spring; 33-a top block; 34-knock pin.

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 are not intended to limit the utility model.

Referring to fig. 1 to 7, the noise reduction structure of the brake according to the present invention will now be described. The noise reduction structure of the brake comprises a shaft sleeve 10, a friction disc 20 and an elastic element 30, wherein the friction disc 20 is sleeved on the periphery of the shaft sleeve 10 and can rotate along with the shaft sleeve 10, and a mounting part is arranged on the friction disc 20; the elastic member 30 is disposed on the mounting portion, the elastic member 30 has an abutting portion capable of abutting against the outer peripheral surface of the bushing 10 in the radial direction of the friction disk 20, and the elastic member 30 has a biasing force for bringing the abutting portion closer to the center of the friction disk 20.

The noise reduction structure of the brake provided by the embodiment is characterized in that when the noise reduction structure of the brake is used, the shaft sleeve 10 is matched with a shaft, the shaft sleeve 10 is matched with the friction disc 20, when the shaft starts to work, the friction disc 20 rotates along with the rotation of the shaft, when the brake starts to brake, the armature is driven by electromagnetism to extrude on the friction disc 20, the rotating speed of the friction disc 20 is reduced through friction resistance, and the braking process is completed.

Compared with the prior art:

(1) by arranging the elastic element 30 on the friction disc 20, the friction disc 20 is combined with the elastic element 30 to present a special shape, so that the assembly between the friction disc 20 and the shaft sleeve 10 is facilitated; and the elastic member 30 can reduce the abrasion of the outer circumference of the shaft sleeve 10 to the elastic member 30, prevent the increase of the friction force between the shaft sleeve 10 and the friction disc 20, and facilitate the installation.

(2) During actual installation, the elastic element 30 is firstly extruded to complete the sleeving of the friction disc 20 on the periphery of the shaft sleeve 10, and after the elastic element 30 is loosened, the elastic element automatically abuts against the peripheral surface of the shaft sleeve 10 to realize the stable matching between the shaft sleeve 10 and the friction disc 20, so that the hysteresis effect of the friction disc 20 is reduced, and the noise reduction is realized.

(3) Unlike the O-ring which is entirely sleeved on the shaft sleeve 10, the elastic member 30 is installed on the friction disc 20 to ensure the matching length of the shaft sleeve 10 and the friction disc 20 in the axial direction and ensure that the shaft sleeve 10 is fully contacted with the friction disc 20.

In some embodiments, a specific embodiment of the above-described bushing 10 may be configured as shown in fig. 2. Referring to fig. 2, the shaft sleeve 10 is provided with a fastening member 11 for connecting with a shaft, and the elastic member 30 can cover an end of the fastening member 11 facing away from the center of the shaft sleeve 10. When the shaft and the shaft sleeve 10 are fixed by the retaining glue or the interference fit, the fastening screw 11 does not need to be installed. The structure of the shaft sleeve 10 is compact, the elastic element 30 and the fastening element 11 are in the same radial direction, and the distribution of the elastic element 30 and the fastening element 11 does not damage the contact length of the shaft sleeve 10 and the friction disc 20 in the axial length direction, so that the thickness does not need to be increased for ensuring the transmission torque, and the part cost is reduced.

It should be noted that the fastening member 11 is usually a fastening screw, and one end of the fastening screw extends out of the inner circumferential surface of the shaft sleeve 10 for being inserted into a corresponding hole on the shaft, so as to realize the axial and radial limitation of the shaft, and realize the stable matching of the shaft sleeve 10 and the shaft.

In some embodiments, a specific embodiment of the above-described bushing 10 may be configured as shown in fig. 1 to 7. Referring to fig. 1 to 7, the mounting portion is a mounting platform 24, and an abutment plane 12 corresponding to the mounting platform 24 is formed on the outer circumferential surface of the sleeve 10. The installation of the elastic piece 30 is facilitated by the arrangement of the installation platform 24, and because the elastic piece 30 is installed on the installation platform, the abutting part on the elastic piece 30 abuts against the abutting plane 12 on the shaft sleeve 10, so that the abutting effect of the abutting part is better, the abutting path of the abutting part is ensured to be parallel to the radial direction of the friction disc 20, the abutting position is prevented from being eccentric when the abutting part abuts against the inclined plane, and the noise reduction effect of the elastic piece 30 is optimized by the structure.

In some embodiments, a specific embodiment of the mounting platform 24 described above may be configured as shown in fig. 1-7. Referring to fig. 1 to 7, the shaft sleeve 10 is engaged with the friction disc 20, a tooth gap is formed on the friction disc 20, a side surface of the tooth gap facing to the center of the friction disc 20 forms a mounting platform, and the abutting plane 12 is arranged in the tooth gap. I.e. the teeth at a certain position of the friction disc 20 are missing, thereby forming a tooth gap. The machining of the mounting platform is completed by machining the friction disc 20 with internal teeth (which may be done by powder metallurgy or wire cutting), by removing the teeth at individual positions, either completely from the roots of the teeth or starting from a position between the tips and roots; the mounting platform 24 is formed by modifying the teeth on the friction disc 20, thereby facilitating modification without changing the manufacturing process of the friction disc 20. Although the number of teeth engaged is reduced, the overall strength is reduced too little, and the safety of the connection is not affected.

As another embodiment, the shaft sleeve 10 may be a polygonal body, so that the friction disc 20 is driven to rotate by the engagement of the friction disc 20 at the edge, in this case, the inner peripheral surface of the friction disc 20 also encloses a polygonal space, one of the side walls of which is the mounting platform 24.

In some embodiments, a modified embodiment of the mounting platform 24 described above may be configured as shown in fig. 1-7. Referring to fig. 1 to 7, a plurality of mounting platforms 24 are uniformly distributed around the axis of the friction disc 20, and the abutting planes 12 correspond to the mounting platforms one to one. It should be noted that, a plurality of mounting platforms 24 are provided, and a plurality of elastic members 30 are not necessarily provided, for example, when three mounting platforms 24 are provided, only one elastic member 30 may be installed, or three elastic members may be installed; correspondingly, only one fastening screw can be installed, and three fastening screws can also be installed. By suitably reducing the number of elastic members 30, flexibility of use is enhanced.

In some embodiments, a specific embodiment of the elastic member 30 may be configured as shown in fig. 1 to 3. Referring to fig. 1 to 3, the elastic element 30 is a spring plate 31, two ends of the spring plate 31 are bent to form two clip arms, the two clip arms are respectively clamped at two sides of the mounting portion, and a middle portion of the spring plate 31 is raised toward a center of the friction disc 20 to form an abutting portion. During installation, the two clamping arms of the elastic sheet 31 are broken to increase the distance, the two clamping arms of the elastic sheet 31 are respectively placed at the two shaft ends of the friction disc 20, the two clamping arms of the elastic sheet 31 automatically tighten to clamp the installation part in the axial direction of the friction disc 20, the middle part of the elastic sheet 31 bulges, and the shaft sleeve 10 is supported by the elastic force of the elastic sheet 31 to achieve the purpose of reducing noise.

Specifically, the elastic sheet 31 is arranged on the mounting platform 24, the mounting platform 24 is provided with a clamping position 23 corresponding to two axial ends of the shaft sleeve 10, the clamping position 23 is used for clamping two clamping arms on the elastic sheet 31, so that the two clamping arms of the elastic sheet 31 do not protrude out of two end faces of the friction disc 20, and the middle part of the elastic sheet 31 abuts against the abutting plane 12 on the shaft sleeve 10; correspondingly, the abutting plane on the shaft sleeve 10 is also provided with an internal thread hole which radially penetrates along the shaft sleeve 10, the fastener 11 is arranged in the internal thread hole, and the elastic sheet 31 abuts against the abutting plane and covers one end of the internal thread hole, which is back to the center of the shaft sleeve 10.

In some embodiments, an alternative embodiment of the spring 30 may be configured as shown in FIG. 4. Referring to fig. 4, the mounting portion has a receiving cavity 21 extending in a radial direction of the friction disc 20 and opening inward (i.e., toward a center of the friction disc 20), the elastic member 30 includes a spring 32 and a top block 33, the spring 32 is disposed in the receiving cavity 21, and one end of the spring abuts against a bottom of the receiving cavity 21; the top piece 33 is provided at the other end of the spring 32 and projects from the inner peripheral surface of the friction disk 20 (i.e., the mounting platform 24), and the top piece 33 forms an abutting portion.

Specifically, during installation, the spring 32 is placed in the accommodating cavity 21, then the top block 33 is placed, the top block 33 is pressed into the accommodating cavity 21 until the shaft sleeve 10 and the friction disc 20 are assembled, and the spring 32 pushes out the top block 33 so that a part of the top block 33 protrudes out of the inner peripheral surface (namely, the installation platform 24) of the friction disc 20 and abuts against the outer peripheral surface (namely, the abutting plane) of the shaft sleeve 10. The purpose of reducing noise is achieved by the radial mutual compression of the top piece 33 and the shaft sleeve 10.

In some embodiments, a specific embodiment of the top block 33 may be configured as shown in fig. 4. Referring to fig. 4, the top block 33 is a sphere, the spring 32 abuts against the top block 33, a closing portion 211 is disposed at an opening of the accommodating cavity 21, and an inner diameter of the closing portion 211 is smaller than a diameter of the sphere. The top block 33 is a ball, and can easily slide or roll under the abutting action of the spring 32, so that the mutual friction force between the friction disc 20 and the shaft sleeve 10 in the axial direction is reduced, the friction disc 20 can easily move in the axial direction, the times of mutual rubbing between the friction disc 20 and a pair part is reduced, and the abrasion caused by rubbing at the outer circle of the friction disc 20 is reduced. By providing the relief 211, the top block 33 is prevented from being ejected by the spring 32.

It should be noted that, when the abutting portion of the elastic member 30 is the spherical top block 33, the fastening member 11 is not installed on the shaft sleeve 10, because the threaded hole corresponding to the installation of the fastening member 11 is needed on the shaft sleeve 10 in the case of installing the fastening member 11, the spherical top block 33 may be clamped into the threaded hole on the shaft sleeve 10 under the action of the spring 32, and therefore, in this case, the shaft and the shaft sleeve 10 are fixed by using the retaining glue or the interference fit. The same applies hereinafter to the elastic member 30 as the knock pin 34.

In some embodiments, an alternative embodiment of the resilient member 30 may be configured as shown in fig. 5-7. Referring to fig. 5 to 7, the mounting portion is provided with a snap groove 22, the elastic member 30 is a top pin 34 inserted into the snap groove 22, and the top pin 34 is an elastic member having one end protruding out of the inner circumferential surface of the friction disc 20 to form an abutting portion. The knock pin 34 is pressed against the outer peripheral surface of the sleeve 10 in the radial direction, and the friction disk 20 and the sleeve 10 have a certain mutual pressing force in the radial direction by the elasticity thereof, thereby achieving the purpose of reducing noise.

Specifically, one end surface of the knock pin 34 close to the center of the friction disc 20 is a spherical surface, and the spherical surface abuts against the abutting plane 12 on the shaft sleeve 10, so that the friction disc 20 can slide in the axial direction, the frequency of rubbing the friction disc 20 and a coupling is reduced, and the abrasion of the outer circle of the friction disc 20 caused by rubbing is reduced; the two sides of the abutting plane 12 along the circumferential direction of the shaft sleeve 10 are further provided with matching surfaces 13, and the cylindrical surface of the periphery of the ejector pin 34 is in sliding fit with the side surface (namely the matching surface 13) of the abutting plane 12 on the shaft sleeve 10, so that the friction force of the friction disc 20 on the shaft sleeve 10 is further reduced, and the impact generated between the friction disc 20 and the shaft sleeve 10 after the rotating speed is reduced due to scratch in the rotating process can be absorbed and buffered.

Alternatively, the pin 34 is made of a material having some elasticity or lubricity, such as PTEE.

In the embodiment of the present application, when the elastic member 30 is in the form of the elastic sheet 31 or the spring 32+ the top block 33, the elastic member is made of metal, which is smoother than the surface of the conventional O-ring, thereby facilitating the installation between the shaft sleeve 10 and the friction disc 20; and the temperature resistance is higher, the elastic stability is better, and the fatigue life is longer.

Based on the same inventive concept, the embodiment of the application also provides a brake, which comprises the brake noise reduction structure.

In the brake provided by the embodiment, when the brake is used, the shaft sleeve 10 is matched with a shaft, the shaft sleeve 10 is matched with the friction disc 20, when the shaft starts to work, the friction disc 20 rotates along with the rotation of the shaft, when the brake starts to brake, the armature is driven by electromagnetism to be extruded on the friction disc 20, the rotating speed of the friction disc 20 is reduced through friction resistance, and the braking process is completed.

Compared with the prior art:

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 noise reduction structure, comprising:

a shaft sleeve;

2. The noise reduction structure for the brake of claim 1, wherein the shaft sleeve is provided with a fastening member for connecting with a shaft, and the elastic member is capable of covering an end of the fastening member away from the center of the shaft sleeve.

3. The brake noise reduction structure according to claim 1, wherein the mounting portion is a mounting platform, and an abutment plane corresponding to the mounting platform is formed on an outer circumferential surface of the boss.

4. A brake noise reducing structure according to claim 3, wherein said sleeve is engaged with said friction disc teeth, said friction disc is formed with tooth notches, a side of said tooth notches facing a center of said friction disc forms said mounting platform, and said abutment plane is disposed in said tooth notches.

5. A brake noise reducing structure according to claim 3 or 4, wherein a plurality of the mounting platforms are evenly distributed about the axis of the friction disc, the abutment planes corresponding one-to-one with the mounting platforms.

6. The noise reduction structure of the brake of claim 1, wherein the elastic member is a spring plate, two ends of the spring plate are bent to form clamping arms, the two clamping arms are respectively clamped at two sides of the mounting portion, and a middle portion of the spring plate is raised toward a center of the friction disc to form the abutting portion.

7. The brake noise reduction structure of claim 1, wherein the mounting portion has an accommodating chamber extending radially of the friction disc and opening inwardly therein, and the elastic member includes:

8. The structure of claim 7, wherein the top block is a sphere, the spring abuts against the top block, a mouth of the cavity is provided at the opening, and the inner diameter of the mouth is smaller than the diameter of the sphere.

9. The brake noise reduction structure according to claim 1, wherein the mounting portion is provided with a snap groove, the elastic member is a knock pin fitted into the snap groove, and the knock pin is an elastic member having one end protruding from an inner circumferential surface of the friction disk to form the abutting portion.

10. A brake comprising a brake noise reducing structure according to any one of claims 1 to 9.