CN219082128U - Electronic parking brake caliper, electronic parking brake and vehicle - Google Patents
Electronic parking brake caliper, electronic parking brake and vehicle Download PDFInfo
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- CN219082128U CN219082128U CN202320150161.3U CN202320150161U CN219082128U CN 219082128 U CN219082128 U CN 219082128U CN 202320150161 U CN202320150161 U CN 202320150161U CN 219082128 U CN219082128 U CN 219082128U
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- electronic parking
- parking brake
- brake
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Abstract
The utility model relates to an electronic parking brake caliper, which comprises a brake bracket, a caliper body, a friction plate and a brake driving mechanism, wherein the brake driving mechanism comprises a brake driving unit, a driving screw, a compression nut and a brake piston which is provided with a transmission inner cavity and is assembled in a cylinder hole of the caliper body, the compression nut is in threaded connection with the driving screw and is positioned in the transmission inner cavity, the nut head of the compression nut is in a spherical crown shape or a spherical table shape, the inner cavity wall of the brake piston comprises a conical surface section, and the diameter of the nut head and the diameter of the conical surface section are adapted so that the nut head and the conical surface section are in line contact type abutting joint. The nut head of the compression nut is designed into a spherical crown shape or a spherical table shape, and is in contact fit with the inner wall of the conical surface section of the brake piston in a line contact mode, so that the requirements on the machining precision and the fit precision of the compression nut and the brake piston can be effectively reduced, the production cost of equipment is reduced, and on the other hand, the abnormal abrasion of the compression nut and the like can be reduced.
Description
Technical Field
The present utility model relates to an electronic parking brake caliper, an electronic parking brake provided with the same, and a vehicle provided with the same.
Background
Electronic parking brakes (EPB, electricalParkBrake) are increasingly being used. In a conventional electronic parking brake, when parking is required, the drive screw 101 drives the compression nut 102 in the direction of the friction plate. As shown in fig. 1, when the compression nut 102 contacts the brake piston 103, the head of the compression nut 102 contacts the conical surface 1031 inside the brake piston 103, the head of the conventional compression nut 102 is the conical surface 1021, and is in surface contact fit with the conical surface 1031 inside the brake piston 103, which puts higher demands on the processing precision and the fit precision of the compression nut 102 and the brake piston 103, the equipment manufacturing cost is higher, and abnormal abrasion of the compression nut 102 is easily caused by insufficient processing precision and fit precision of the compression nut 102 and the brake piston 103.
Disclosure of Invention
The utility model relates to an electronic parking brake caliper, an electronic parking brake provided with the electronic parking brake caliper and a vehicle provided with the electronic parking brake, which can at least solve part of defects in the prior art.
The utility model relates to an electronic parking brake caliper, which comprises a brake bracket, a caliper body, a friction plate and a brake driving mechanism, wherein the brake driving mechanism comprises a brake driving unit, a driving screw, a compression nut and a brake piston with a transmission inner cavity, the brake piston is assembled in a caliper body cylinder hole, the compression nut is in threaded connection with the driving screw and both are positioned in the transmission inner cavity, the nut head of the compression nut is in a spherical crown shape or a spherical table shape, and 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 as to be in line contact type abutting joint with the conical surface section.
As one embodiment, the nut head has a plurality of hollowed-out portions.
As one embodiment, the hollow inner cavity of the compression nut penetrates through two ends of the compression nut.
As one of the implementation modes, a limiting ring is further formed on the outer wall of the compression nut, and the limiting ring is positioned between the nut head and the brake driving unit; the inner cavity wall of the brake piston further comprises a straight cylinder guide section, and the limiting ring is in guide fit with the straight cylinder guide section.
As one embodiment, the outer ring of the limiting ring has a regular prism shape.
As one embodiment, the brake driving unit adopts an MGU assembly, and an output end of the MGU assembly is connected with the driving screw.
The utility model also relates to an electronic parking brake provided with an electronic parking brake caliper as described above.
The utility model also relates to a vehicle provided with an electronic parking brake as described above.
The utility model has at least the following beneficial effects: the nut head of the compression nut is designed into a spherical crown shape or a spherical table shape, and is in a line contact mode when in contact fit with the inner wall of the conical surface section of the brake piston, so that on one hand, compared with the mode that the compression nut is in surface contact with the brake piston, the line contact mode can effectively reduce the requirements on the processing precision and the fit precision of the compression nut and the brake piston, thereby reducing the production cost of equipment, and on the other hand, the abnormal abrasion and other conditions of the compression nut caused by the insufficient processing precision and the fit precision of the compression nut and the brake piston can be reduced; moreover, after the compression nut is worn, the structure of the head part of the ball nut can ensure that the ball nut still can be matched with the brake piston normally, so that the working reliability and the service life of the electronic parking brake caliper and the electronic parking brake can be improved.
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 diagram of a fit structure of a compression nut and a brake piston provided in the background art;
fig. 2 is a schematic structural diagram of an electronic parking brake caliper 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. 2-4, an embodiment of the present utility model provides an electronic parking brake caliper, including a brake bracket, a caliper body 14, a friction plate 15, and a brake driving mechanism 16, where the brake driving mechanism 16 includes a brake driving unit, a driving screw 11, a compression nut 12, and a brake piston 13 having a transmission cavity, where the brake piston 13 is assembled in a cylinder hole of the caliper body 14, where the compression nut 12 is screwed onto the driving screw 11 and both are located in the transmission cavity, where a nut head 121 of the compression nut 12 is in a spherical crown shape or a spherical table shape, and an inner cavity wall of the brake piston 13 includes a conical surface section, and where the nut head 121 is adapted to be in diameter contact with the conical surface section so that the two are in a line contact shape.
The friction plates 15 are provided with two groups, and better braking effect can be achieved through contact friction between the inner friction plates 15 and the outer friction plates 15 and the brake disc; the two sets of friction plates 15 are configured as a friction plate assembly.
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 driving unit adopts an MGU (electronic parking actuator) assembly, and an output end of the MGU assembly is connected with the driving 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. 4, the nut head 121 has a plurality of hollow portions 123, which can reduce the weight of the compression nut 12, and can fill the brake fluid between the nut head 121 and the brake piston 13 more easily while ensuring the matching effect between the compression nut 12 and the brake piston 13, so as to reduce the abrasion therebetween.
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. 2-4, 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; 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 the electronic parking brake caliper provided by the embodiment, 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 form 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 conditions of abnormal abrasion and the like of the compression nut 12 caused by 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 service life of the electronic parking brake caliper and the electronic parking brake can be improved.
The nut head 121 is preferably formed in a spherical table shape.
Example two
The embodiment of the utility model provides an electronic parking brake, which is provided with the electronic parking brake caliper provided by the first embodiment.
The electronic parking brake further comprises a brake disc for contact friction with the friction plate 15. When two groups of friction plates 15 are arranged, the two groups of friction plates 15 are respectively arranged at two sides of the brake disc and respectively contact with the disc surfaces at two sides of the brake disc for friction, so that the braking effect is better.
Example III
The embodiment of the utility model provides a vehicle provided with the electronic parking brake.
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 (8)
1. The utility model provides an electron parking brake caliper, includes brake bracket, calliper body, friction disc and braking actuating mechanism, braking actuating mechanism includes braking actuating unit, drive screw rod, gland nut and has the brake piston of transmission inner chamber, brake piston assembly is in calliper body jar hole, gland nut spiro union in on the drive screw rod and both be located in the transmission inner chamber, its characterized in that: 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.
2. The electronic parking brake caliper of claim 1, wherein: the nut head is provided with a plurality of hollowed-out parts.
3. The electronic parking brake caliper of claim 1, wherein: the hollow inner cavity of the compression nut penetrates through two ends of the compression nut.
4. The electronic parking brake caliper of claim 1, wherein: a limiting ring is further formed on the outer wall of the compression nut, and the limiting ring is positioned between the nut head and the brake driving unit; the inner cavity wall of the brake piston further comprises a straight cylinder guide section, and the limiting ring is in guide fit with the straight cylinder guide section.
5. The electronic parking brake caliper of claim 4, wherein: the outer ring of the limiting ring is in a regular prismatic shape.
6. The electronic parking brake caliper of claim 1, wherein: the braking driving unit adopts an MGU assembly, and the output end of the MGU assembly is connected with the driving screw.
7. An electronic parking brake, characterized in that: an electronic parking brake caliper as claimed in any one of claims 1 to 6.
8. A vehicle, characterized in that: an electronic parking brake as claimed in claim 7 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320150161.3U CN219082128U (en) | 2023-01-13 | 2023-01-13 | Electronic parking brake caliper, electronic parking brake and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320150161.3U CN219082128U (en) | 2023-01-13 | 2023-01-13 | Electronic parking brake caliper, electronic parking brake and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN219082128U true CN219082128U (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320150161.3U Active CN219082128U (en) | 2023-01-13 | 2023-01-13 | Electronic parking brake caliper, electronic parking brake and vehicle |
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| Country | Link |
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| CN (1) | CN219082128U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017453A (en) * | 2021-11-09 | 2022-02-08 | 浙江汇丰汽车零部件股份有限公司 | Main shaft backstop circle structure |
-
2023
- 2023-01-13 CN CN202320150161.3U patent/CN219082128U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017453A (en) * | 2021-11-09 | 2022-02-08 | 浙江汇丰汽车零部件股份有限公司 | Main shaft backstop circle structure |
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