CN219413342U

CN219413342U - Electronic brake and hub motor

Info

Publication number: CN219413342U
Application number: CN202320081174.XU
Authority: CN
Inventors: 李乐乐; 胡鹏飞; 徐云; 李正刚
Original assignee: Wuhan Youfin Autoparts Co ltd
Current assignee: Wuhan Youfin Autoparts Co ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-07-25
Anticipated expiration: 2033-01-13

Abstract

The utility model relates to an electronic brake, which comprises a caliper body, a friction plate and a brake driving mechanism, wherein the brake driving mechanism comprises a brake driving unit, a driving screw rod connected with the brake driving unit, a compression nut screwed on the driving screw rod and a brake piston with a transmission inner cavity; the brake disc is an annular disc, a plurality of bolt assembly parts for being assembled with a rim are arranged on the outer annular wall of the brake disc, and the friction plate is opposite to and close to the disc surface of the brake disc. And also relates to an in-wheel motor provided with the electronic brake caliper. The annular brake disc is matched with the electronic brake caliper, so that the arrangement of the hub motor can be facilitated; the brake disc is used for being connected with the rim, the effective braking radius is obviously increased, and accordingly, the driving braking moment can be increased.

Description

Electronic brake and hub motor

Technical Field

The utility model belongs to the technical field of vehicle accessories, and particularly relates to an electronic brake and a hub motor provided with the electronic brake.

Background

The traditional electronic brake is generally arranged in the center of a wheel to realize a parking function, and the braking moment of a service braking function is smaller, so that the service braking function of the wheel is difficult to meet. The existing hub motor is generally arranged in a rim during design, then a brake is arranged on a vehicle body or still at the center of a wheel so as to realize a braking function, the brake is inconvenient to arrange, interference is easily generated with the operation of the hub motor during arrangement at the center of the wheel, and the equipment layout compactness is insufficient, so that the traditional electronic brake is difficult to meet the braking requirement of the hub motor, and is unfavorable for design optimization of the hub motor.

Disclosure of Invention

The utility model relates to an electronic brake and an in-wheel motor provided with the same, which at least can solve part of defects in the prior art.

The utility model relates to an electronic brake, which comprises an electronic brake caliper and a brake disc, wherein the electronic brake caliper comprises a caliper body, a friction plate and a brake driving mechanism, the brake driving mechanism comprises a brake driving unit, a driving screw rod connected with the brake driving unit, a compression nut screwed on the driving screw rod and a brake piston with a transmission inner cavity, the brake piston is assembled in a cylinder hole of the caliper body, the driving screw rod and the compression nut are both positioned in the transmission inner cavity, and the nut head of the compression nut is abutted against the inner wall of the brake piston; the brake disc is an annular disc, a plurality of bolt assembly parts used for being assembled with a rim are arranged on the outer annular wall of the brake disc, the axial direction of the driving screw is parallel to the axial direction of the brake disc, and the friction plate is opposite to and close to the disc surface of the brake disc.

As one embodiment, the friction plates have two groups and are arranged on both sides of the brake disc.

As one embodiment, the bolt fitting portion includes a fitting block provided on an outer circumferential wall of the brake disc, and a bolt fitting hole is formed in the fitting block.

As one embodiment, the fitting block is an isosceles trapezoid block, and the long side thereof is connected to the brake disc.

As one embodiment, the fitting block is integrally formed with the brake disc.

As one embodiment, each of the bolt fitting portions is looped at uniform intervals in the circumferential direction of the brake disc.

As one embodiment, the caliper body is arranged to extend into the inner annular space of the brake disc.

As one embodiment, the electric brake caliper further comprises a caliper bracket, the caliper body is connected with the caliper bracket through two guide pins, and the caliper body can axially slide on the guide pins.

As one of the embodiments, the nut head of the compression nut is spherical crown-shaped or spherical table-shaped, the inner cavity wall of the brake piston comprises a conical surface section, and the nut head is matched with the diameter of the conical surface section so that the nut head and the conical surface section are in line contact type abutting joint.

The utility model also relates to a hub motor comprising a rim and a motor structure, and further comprising an electronic brake as described above, the brake disc bolts being fitted on the rim.

The utility model has at least the following beneficial effects: the annular brake disc is matched with the electronic brake caliper, so that the annular space provided by the annular brake disc can facilitate the arrangement of the hub motor and the design and manufacture of the hub motor while the braking effect is ensured. The brake disc is used for being connected with the rim, the effective braking radius is obviously increased, and accordingly, the driving braking moment can be increased.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an electronic brake according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of an installation structure of an electronic brake according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a fitting structure of a compression nut and a brake piston according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a compression nut according to an embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1 and 2, the embodiment of the utility model provides an electronic brake, which comprises an electronic brake caliper 1 and a brake disc 2, wherein the electronic brake caliper 1 comprises a caliper body 14, a friction plate 15 and a brake driving mechanism, the brake driving mechanism comprises a brake driving unit 16, a driving screw 11 connected with the brake driving unit 16, a compression nut 12 screwed on the driving screw 11 and a brake piston 13 with a transmission cavity, the brake piston 13 is assembled in a cylinder hole of the caliper body 14, the driving screw 11 and the compression nut 12 are both positioned in the transmission cavity, and a nut head 121 of the compression nut 12 is abutted against the inner wall of the brake piston 13; the brake disc 2 is an annular disc, a plurality of bolt assembling parts for assembling with the rim 3 are arranged on the outer annular wall of the brake disc 2, the axial direction of the driving screw 11 is parallel to the axial direction of the brake disc 2, and the friction plate 15 is opposite to and close to the disc surface of the brake disc 2.

Wherein, the friction plates 15 are provided with two groups and are respectively arranged at two sides of the brake disc 2, and better braking effect can be achieved by the contact friction between the inner and outer friction plates 15 and the brake disc 2; the two sets of friction plates 15 are configured as a friction plate assembly.

The one-side disc surface of the brake disc 2 is used for connection with the rim 3, and therefore the electric brake caliper 1 is located on the other side of the brake disc 2.

In one embodiment, as shown in fig. 1, the bolt assembly portion includes an assembly block 21 provided on an outer circumferential wall of the brake disc 2, and a bolt assembly hole is formed in the assembly block 21. The fitting block 21 is an isosceles trapezoid block, and the long side thereof is connected to the brake disc 2.

Wherein the brake disc 2 is used for coaxially connecting with the rim 3, and is preferably provided with an annular distribution bolt assembly part in the circumferential direction, so as to ensure reliable connection with the rim 3; further, the bolt assembly parts are uniformly arranged in a surrounding manner along the circumferential direction of the brake disc 2 in a spacing manner, so that the force transmission uniformity between the brake disc 2 and the rim 3 is ensured.

Wherein, the assembly block 21 is preferably integrally formed with the brake disc 2.

According to the electronic brake provided by the utility model, the annular brake disc 2 is matched with the electronic brake caliper 1, so that the annular space provided by the annular brake disc 2 can facilitate the arrangement of the hub motor and the design and manufacture of the hub motor while the braking effect is ensured. The brake disc 2 is intended to be connected to the rim 3, the effective braking radius being significantly increased, and accordingly the service braking torque being able to be increased.

Preferably, as shown in fig. 1 and 2, the caliper body 14 extends into the inner ring space of the brake disc 2, so that the inner space of the brake disc 2 is fully utilized, the arrangement of the electric brake caliper 1 is facilitated, and the structural compactness of the hub motor is improved.

The cooperating structures of the driving screw 11, the compression nut 12, the brake piston 13, the caliper body 14 and the friction plate 15 are conventional in the art, and will not be described herein.

In one embodiment, the brake drive unit 16 is an MGU (electronic parking actuator) assembly, the output of which is connected to the drive screw 11. Wherein, MGU assembly is the mature equipment in this field, and specific structure is not described here in detail. The MGU assembly described above is mounted on caliper body 14.

In one embodiment, as shown in fig. 3 and 4, the nut head 121 of the compression nut 12 is in the shape of a spherical cap or a spherical table, and the inner cavity wall of the brake piston 13 includes a tapered surface section, and the nut head is adapted to be in diameter contact with the tapered surface section so that the nut head and the tapered surface section are in line contact. The nut head 121 of the compression nut 12 is designed into a spherical crown shape or a spherical table shape, and is in a line contact mode when being in contact fit with the inner wall of the conical surface section of the brake piston 13, on one hand, compared with the mode that the compression nut 12 is in surface contact with the brake piston 13, the line contact mode can effectively reduce the requirements on the processing precision and the fit precision of the compression nut 12 and the brake piston 13, thereby reducing the production cost of equipment, and on the other hand, the abnormal abrasion and other conditions of the compression nut 12 caused by the insufficient processing precision and the fit precision of the compression nut 12 and the brake piston 13 can be reduced; moreover, after the compression nut 12 is worn, the structure of the ball nut head 121 can ensure that the compression nut can still be matched with the brake piston 13 normally, so that the working reliability and the service life of the electronic parking brake caliper can be improved.

Preferably, as shown in fig. 4, the nut head 121 has a plurality of hollow portions 123, which on one hand can reduce the weight of the compression nut 12, and on the other hand, can ensure the matching effect between the compression nut 12 and the brake piston 13, and simultaneously can make the compression nut 12 head and the brake piston 13 easier to be filled with brake fluid, so as to reduce the abrasion between the compression nut 12 and the brake piston 13.

In one embodiment, the hollow cavity of the compression nut 12 penetrates through two ends of the compression nut 12, and the hollow cavity includes a straight rod section cavity of a straight rod section of the nut and a head cavity in the head 121 of the nut, wherein the wall of the straight rod section cavity is a threaded inner wall and is suitable for being matched with the driving screw 11, and the head cavity is a non-threaded inner wall, so that the driving screw 11 is convenient to set, and meanwhile, the weight and the processing cost can be reduced.

Further, as shown in fig. 3 and 4, a limiting ring 122 is further formed on the outer wall of the compression nut 12, and the limiting ring 122 is located between the nut head 121 and the brake driving unit 16; the inner cavity wall of the brake piston 13 further comprises a straight cylinder guide section, and the limiting ring 122 is in guide fit with the straight cylinder guide section. With this structure, the smoothness and stability of the movement of the compression nut 12 and the brake piston 13 can be improved. In one embodiment, as shown in fig. 4, the outer ring of the limiting ring 122 has a regular prism shape.

In one embodiment, the electric brake caliper 1 further comprises a caliper bracket 17, the caliper body 14 is connected to the caliper bracket 17 by two guide pins, and the caliper body 14 is axially slidable on the guide pins.

Example two

The embodiment of the utility model provides a hub motor, which comprises a rim 3 and a motor structure, and further comprises the electronic brake provided by the first embodiment, wherein the brake disc 2 is assembled on the rim 3 through bolts.

Wherein preferably the brake disc 2 is fitted on the outer end face of the rim 3.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. An electronic brake comprising an electronic brake caliper and a brake disc, characterized in that: the electronic brake caliper comprises a caliper body, a friction plate and a brake driving mechanism, wherein the brake driving mechanism comprises a brake driving unit, a driving screw rod connected with the brake driving unit, a compression nut screwed on the driving screw rod and a brake piston with a transmission inner cavity, the brake piston is assembled in a cylinder hole of the caliper body, the driving screw rod and the compression nut are both positioned in the transmission inner cavity, and the nut head of the compression nut is abutted against the inner wall of the brake piston; the brake disc is an annular disc, a plurality of bolt assembly parts used for being assembled with a rim are arranged on the outer annular wall of the brake disc, the axial direction of the driving screw is parallel to the axial direction of the brake disc, and the friction plate is opposite to and close to the disc surface of the brake disc.

2. The electronic brake of claim 1, wherein: the friction plates are arranged in two groups and are arranged on two sides of the brake disc.

3. The electronic brake of claim 1, wherein: the bolt assembly part comprises an assembly block arranged on the outer annular wall of the brake disc, and a bolt assembly hole is formed in the assembly block.

4. An electronic brake according to claim 3, wherein: the assembly block is an isosceles trapezoid block, and the long side of the assembly block is connected with the brake disc.

5. An electronic brake according to claim 3, wherein: the assembly block and the brake disc are integrally formed.

6. The electronic brake of claim 1, wherein: the bolt assembly parts are uniformly arranged in a spacing mode along the circumferential direction of the brake disc in a surrounding mode.

7. The electronic brake of claim 1, wherein: the caliper body extends into the inner ring space of the brake disc.

8. The electronic brake of claim 1, wherein: the electronic brake caliper further comprises a caliper bracket, wherein the caliper body is connected with the caliper bracket through two guide pins, and the caliper body can axially slide on the guide pins.

9. The electronic brake of claim 1, wherein: the nut head of the compression nut is spherical crown-shaped or spherical table-shaped, the inner cavity wall of the brake piston comprises a conical surface section, and the diameter of the nut head is matched with that of the conical surface section so that the nut head and the conical surface section are in line contact type abutting joint.

10. The utility model provides a wheel hub motor, includes rim and motor structure, its characterized in that: an electronic brake as claimed in any one of claims 1 to 9, the brake disc bolts being mounted on the rim.