Electronic parking caliper

Abstract

The utility model discloses an electronic parking caliper which comprises a caliper body, a brake pad, a motor and a movable cavity. One end of the driving shaft extends out of the movable cavity and is fixedly connected with the motor; the piston is connected into the movable cavity in a sliding manner; the rolling connecting structure is used for movably connecting the driving shaft with the piston; through the arrangement of the balls, sliding friction force between the driving shaft and the piston is changed into rolling friction force, so that the piston is pushed more smoothly; through the arrangement of the distance sensor, the abrasion state of the friction plate can be fed back in real time, a user is reminded to replace the friction plate in time, through the arrangement of the rotating block, the connecting groove, the elastic piece and the like, connection between the feedback block and the brake pad can be relieved only by rotating the rotating block by 180 degrees, and the user is not affected to replace the brake pad subsequently.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive parts, in particular to an electronic parking caliper. Background Art

[0002] An electronic parking caliper is an electronic parking system and a part of an automotive parking brake system. With the development of automotive electronic control systems, electronic parking calipers have become a standard configuration for many vehicle models. Their use is becoming more and more common, replacing traditional mechanical hand brakes. Such calipers are driven by motors and use electronic sensors and actuators to control vehicle braking, making braking operations more convenient and safe. They can improve the braking response speed and control accuracy, reduce the braking distance and time, and enhance driving safety and comfort.

[0003] For example, the Chinese utility model EPB electronic parking caliper with the publication number CN218325909U starts the motor. The output shaft of the motor rotates to drive the drive shaft to rotate. The drive shaft pushes the drive sleeve to move. The drive sleeve pushes the piston guide sleeve to move. The piston guide sleeve pushes the first brake pad to move, thereby clamping the brake disc. The cooperation between the drive shaft and the drive sleeve adopts a serrated thread fit, which can withstand a large one-way pressure to position and hold the brake disc for convenient braking. However, such a structure still has the following several significant defects:

[0004] 1. During the parking process, sliding friction will occur between the drive shaft and the drive sleeve, with a large frictional force, resulting in poor smoothness of the movement of the piston guide sleeve;

[0005] 2. The usage state of the brake pads cannot be monitored in real time, and they cannot be replaced in time in the later stage of brake pad use or when the performance of the brake pads deteriorates. Only when it is found that the braking performance deteriorates or braking fails is it discovered that the brake pads have been worn out, but at this time, braking failure has already occurred. Summary of the Invention

[0006] The utility model aims to solve one of the technical problems existing in the prior art.

[0007] The present application provides an electronic parking caliper, including:

[0008] A caliper, brake pads, a motor, and an activity cavity;

[0009] It further includes:

[0010] A drive shaft, one end of which extends out of the activity cavity and is fixedly connected to the motor;

[0011] A piston, which is slidably connected in the activity cavity;

[0012] A rolling connection structure, which is used to movably connect the drive shaft and the piston.

[0013] The rolling connection structure includes:

[0014] Rolling grooves, which are respectively arranged on the driving shaft and the piston;

[0015] Ball bearings, which are rotatably installed in the rolling grooves on the piston.

[0016] A positioning block is arranged on the piston;

[0017] Wherein, the positioning block restricts the rotation of the piston in the movable cavity.

[0018] It further includes:

[0019] A linear guide rail, which is arranged at one end of the caliper where the brake pad is installed;

[0020] A feedback block, which is slidably installed on the linear guide rail.

[0021] It further includes:

[0022] A distance sensor, which is arranged on the feedback block.

[0023] It further includes:

[0024] A rotating block, which is rotatably connected to the feedback block;

[0025] A connecting groove, which is arranged at the bottom end of the rotating block;

[0026] Wherein, the top end of the brake pad can be inserted into the connecting groove.

[0027] It further includes:

[0028] A groove, which is arranged on the surface of the rotating block facing the feedback block;

[0029] A receiving hole, which is arranged on the surface of the feedback block facing the rotating block;

[0030] An elastic member, which is fixedly installed in the receiving hole.

[0031] The groove includes:

[0032] A first groove, which is arranged at one end of the rotating block close to the connecting groove;

[0033] A second groove, which is arranged at one end of the rotating block far from the connecting groove.

[0034] The elastic member includes:

[0035] A spring, one end of which is fixedly connected in the receiving hole;

[0036] A spherical ball, which is fixedly connected to the other end of the spring;

[0037] Wherein, the spherical ball abuts against the groove.

[0038] The beneficial effects of the present utility model are as follows:

[0039] 1. By providing the ball bearings, the sliding friction between the drive shaft and the piston is changed into rolling friction, thus making the pushing of the piston smoother.

[0040] 2. By providing the distance sensor, the wear state of the friction plate can be feedback in real time and the user can be reminded to replace it in time. By providing the rotating block, connecting groove, elastic member, etc., only by rotating the rotating block by 180 degrees, the connection between the feedback block and the brake pad can be released, without affecting the user's subsequent replacement of the brake pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic structural view of an electronic parking caliper in an embodiment of the present application;

[0042] Figure 2 It is a schematic cross-sectional structural view of an electronic parking caliper in an embodiment of the present application;

[0043] Figure 3 It is Figure 2 an enlarged structural view of part A in

[0044] Figure 4 It is Figure 2 an enlarged structural view of part B in

[0045] Figure 5 It is Figure 4 an enlarged structural view of part C in

[0046] REFERENCE NUMERALS

[0047] 1 - Caliper, 2 - Brake Pad, 3 - Motor, 4 - Activity Chamber, 51 - Drive Shaft, 52 - Piston, 53 - Rolling Connection Structure, 531 - Rolling Groove, 532 - Ball Bearing, 54 - Positioning Block, 6 - Linear Guide Rail, 7 - Feedback Block, 8 - Distance Sensor, 9 - Rotating Block, 10 - Connecting Groove, 11 - Groove, 111 - First Groove, 112 - Second Groove, 12 - Accommodating Hole, 13 - Elastic Member, 131 - Spring, 132 - Spherical Ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0049] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally indicates an "or" relationship between the related objects before and after.

[0050] The following will combine the accompanying drawings and specifically describe an electronic parking caliper provided by an embodiment of this application through specific embodiments and their application scenarios.

[0051] Embodiment 1:

[0052] As Figures 1 to 3 shown, an embodiment of this application provides an electronic parking caliper, including a caliper 1, brake pads 2, a motor 3, and a movable cavity 4. It further includes a drive shaft 51, one end of which extends out of the movable cavity 4 and is fixedly connected to the motor 3; a piston 52, which is slidably connected in the movable cavity 4; and a rolling connection structure 53, which is used to movably connect the drive shaft 51 and the piston 52.

[0053] Furthermore, the rolling connection structure 53 includes rolling grooves 531, which are respectively arranged on the drive shaft 51 and the piston 52; and balls 532, which are rotatably installed in the rolling grooves 531 on the piston 52.

[0054] Furthermore, a positioning block 54 is arranged on the piston 52; wherein, the positioning block 54 restricts the piston 52 from rotating in the movable cavity 4.

[0055] In this embodiment of this application, due to the above structure, the motor 3 is fixedly and detachably connected to the left side of the caliper 1 through bolts. A pair of brake pads 2 are slidably connected to the right side of the caliper 1. An insertion hole is also arranged on the motor 3 to provide power and electrical signals for the motor 3. When braking is required, the motor 3 rotates to drive the drive shaft 51 to rotate. The rotation of the drive shaft 51 drives the balls 532 to roll in the rolling grooves 531. At the same time, the balls 532 will circulate in the rolling grooves 531 on the piston 52. The rolling balls 532 drive the piston 52 to move linearly in the movable cavity 4. The piston 52 moves to push the brake pads 2 close to one side of the movable cavity 4 to slide and approach the brake pads 2 on the side away from the movable cavity 4, thereby clamping and braking the brake pads 2;

[0056] During the rolling process of the ball 532, the sliding friction between the drive shaft 51 and the piston 52 is changed into rolling friction, which makes the pushing of the piston 52 smoother, greatly reduces the frictional resistance between the two, makes the running track of the piston 52 smoother during the pushing process, significantly improves the movement smoothness, effectively avoids the adverse phenomena such as jamming and wear that may be caused by sliding friction, and thus strongly guarantees that the entire mechanical device can operate more stably and efficiently.

[0057] Embodiment 2:

[0058] As Figure 4 、 Figure 5 shown, in this embodiment, in addition to including the structural features of the foregoing embodiment, it further includes a linear guide rail 6, which is arranged at one end of the caliper 1 where the brake pad 2 is installed; a feedback block 7, which is slidably installed on the linear guide rail 6.

[0059] Furthermore, it further includes a distance sensor 8, which is arranged on the feedback block 7.

[0060] Furthermore, it further includes a rotating block 9, which is rotatably connected to the feedback block 7; a connecting groove 10, which is arranged at the bottom end of the rotating block 9; wherein, the top end of the brake pad 2 can be inserted into the connecting groove 10.

[0061] Furthermore, it further includes a groove 11, which is arranged on the surface of the rotating block 9 facing the feedback block 7; a receiving hole 12, which is arranged on the surface of the feedback block 7 facing the rotating block 9; an elastic member 13, which is fixedly installed in the receiving hole 12.

[0062] Furthermore, the groove 11 includes a first groove 111, which is arranged at one end of the rotating block 9 close to the connecting groove 10; a second groove 112, which is arranged at one end of the rotating block 9 far from the connecting groove 10.

[0063] Furthermore, the elastic member 13 includes a spring 131, one end of which is fixedly connected in the receiving hole 12; a spherical ball 132, which is fixedly connected to the other end of the spring 131; wherein, the spherical ball 132 abuts against the groove 11.

[0064] In this embodiment of the present application, due to the adoption of the above structure, a pair of feedback blocks 7 are arranged on the linear guide rail 6, the output end and the input end of the distance sensor 8 are arranged on the opposite surfaces of the pair of feedback blocks 7, rotating blocks 9 are respectively rotatably connected to the opposite surfaces of the pair of feedback blocks 7, and a pair of brake pads 2 can be respectively detachably connected to the pair of feedback blocks 7;

[0065] When the piston pushes the brake pad 2 on the side close to the movable cavity 4 to slide and move closer to the brake pad 2 on the side away from the movable cavity 4, the brake pad 2 on the side close to the movable cavity 4 drives the connected feedback block 7 to slide through the connecting groove 10. When a pair of brake pads 2 are in a clamping state, the distance sensor 8 records the distance between a pair of feedback blocks 7 and transmits the data back to the vehicle-mounted system, facilitating the driver to understand the thickness of the brake pads 2, thus achieving the purpose of facilitating the detection of the thickness of the brake pads 2. When this distance is shortened to a certain extent, the vehicle-mounted system will remind the user to replace the brake pads 2;

[0066] One end of the spring 131 is fixedly connected to the bottom surface of the inner cavity of the receiving hole 12, and the other end is fixedly connected to the spherical ball 132. The spring 131 pushes the spherical ball 132 into the first groove 111. At this time, the rotating block 9 is connected to the brake pad 2 on the same side through the connecting groove 10. When the rotating block 9 is rotated, the spherical ball 132 is pressed to slide in the direction of the spring 131 and compresses the spring 131 until the spherical ball 132 coincides with the second groove 112. The spring 131 then pushes the spherical ball 132 into the second groove 112 again. At this time, the rotating block 9 is separated from the brake pad 2 on the same side, without affecting the user's subsequent replacement of the brake pad 2.

[0067] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described method may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0068] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An electronic parking caliper, comprising a caliper (1), a brake pad (2), a motor (3), and a movable cavity (4), characterized in that, It also includes: A drive shaft (51), one end of which extends out of the movable cavity (4) and is fixedly connected to the motor (3); A piston (52), which is slidably connected within the movable cavity (4); A rolling connection structure (53), which is used to movably connect the drive shaft (51) and the piston (52).

2. The electronic parking caliper according to claim 1, wherein The rolling connection structure (53) includes: Rolling grooves (531), which are respectively arranged on the drive shaft (51) and the piston (52); Ball bearings (532), which are rotatably installed within the rolling grooves (531) on the piston (52).

3. An electronic parking caliper according to claim 1, wherein, A positioning block (54) is arranged on the piston (52); Wherein, the positioning block (54) restricts the piston (52) from rotating within the movable cavity (4).

4. An electronic parking caliper according to claim 1, characterized in that, It also includes: A linear guide rail (6), which is arranged at one end of the caliper (1) where the brake pad (2) is installed; A feedback block (7), which is slidably installed on the linear guide rail (6).

5. The electronic parking caliper according to claim 4, characterized in that, It also includes: A distance sensor (8), which is arranged on the feedback block (7).

6. The electronic parking caliper according to claim 4, wherein It also includes: A rotating block (9), which is rotatably connected to the feedback block (7); A connecting groove (10), which is arranged at the bottom end of the rotating block (9); Wherein, the top end of the brake pad (2) can be inserted into the connecting groove (10).

7. An electronic parking caliper according to claim 6, characterized in that, It also includes: A groove (11), which is arranged on the side of the rotating block (9) facing the feedback block (7); A receiving hole (12), which is arranged on the side of the feedback block (7) facing the rotating block (9); An elastic member (13), which is fixedly installed within the receiving hole (12).

8. An electronic parking caliper according to claim 7, wherein, The groove (11) includes: A first groove (111), which is arranged at one end of the rotating block (9) close to the connecting groove (10); A second groove (112), which is arranged at one end of the rotating block (9) away from the connecting groove (10).

9. An electronic parking caliper according to claim 7, characterized in that, The elastic member (13) includes: A spring (131), one end of which is fixedly connected within the receiving hole (12); A spherical ball (132), which is fixedly connected to the other end of the spring (131); Wherein, the spherical ball (132) abuts against the groove (11).

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