CN220816351U

CN220816351U - Electronic caliper assembly integrating service braking and electronic parking

Info

Publication number: CN220816351U
Application number: CN202322552121.4U
Authority: CN
Inventors: 呙波; 彭云杰; 蔡运考; 刘佰申; 吴黎峰; 蔡睿; 周欢齐
Original assignee: Zhejiang Libang Hexin Automotive Brake System Co ltd
Current assignee: Zhejiang Libang Hexin Automotive Brake System Co ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2024-04-19
Anticipated expiration: 2033-09-19

Abstract

The utility model discloses an electronic caliper assembly integrating service braking and electronic parking, which relates to the technical field of vehicle braking, and comprises a motor drive assembly and a brake caliper body, wherein the brake caliper body comprises a friction plate and a return structure; the motor driving assembly comprises a pressing block for pushing the friction plate, an axial transmission assembly for converting the rotation moment into axial force and providing the axial force for the pressing block, a service brake motor assembly and a parking brake motor assembly for providing the rotation moment for the axial transmission assembly, a force sensor for detecting the magnitude of the braking force and an ECU (electronic control unit) board for controlling the operation of the parking brake motor assembly and the output moment of the service brake motor assembly. According to the utility model, the driving and parking brake is integrated with one caliper, so that the occupation and the quality of the vehicle space are effectively reduced compared with the scheme that the electronic parking caliper is additionally arranged; and the driving and parking brakes can be mutually redundant through the axial transmission assembly, so that the braking safety is enhanced.

Description

Electronic caliper assembly integrating service braking and electronic parking

Technical Field

The utility model relates to the technical field of vehicle braking, in particular to an electronic caliper assembly integrating service braking and electronic parking.

Background

Among the existing electromechanical brake caliper assembly schemes, most are service brake schemes and do not consider the vehicle parking brake conditions. In the existing electromechanical brake system schemes, a pair of independent electronic parking caliper assemblies are added in a rear brake system to realize the parking function of a vehicle, so that the weight and complexity of the whole brake system are increased, and the cost of the brake system is also increased.

Thus, there is a need for a caliper assembly that provides both service and park braking.

Disclosure of utility model

The utility model aims to provide an electronic caliper assembly integrating service braking and electronic parking, which solves the problem that in the prior art, no caliper assembly capable of realizing service braking and parking braking exists.

The aim of the utility model can be achieved by the following technical scheme:

An electronic caliper assembly integrating service braking and electronic parking comprises a motor drive assembly and a brake caliper body,

The brake caliper body comprises a friction plate used for braking a brake disc and a return structure used for pushing the friction plate to be separated from the brake disc;

The motor driving assembly comprises a pressing block for pushing the friction plate, an axial transmission assembly for converting rotation moment into axial force and providing the axial force for the pressing block, a service brake motor assembly and a parking brake motor assembly for providing the rotation moment for the axial transmission assembly, a force sensor for detecting the braking force of the friction plate to the brake disc, and an ECU controller board for acquiring the braking force required during braking and controlling the output moment of the service brake motor assembly and the operation of the parking brake motor assembly according to the required braking force and the braking force detected by the force sensor;

During service braking, the output torque of the service braking motor assembly drives the axial transmission assembly to push the pressing block to provide thrust for the friction plate, and after service braking, the service braking motor assembly keeps continuously outputting the output torque matched with the required service braking force so as to maintain the required service braking force; when the service brake is released, the service brake motor assembly stops outputting torque to cancel the axial pressing of the axial transmission assembly on the pressing block, and the return structure pushes the friction plate and the pressing block to return;

When in parking braking, the parking braking motor assembly or the service braking motor assembly and the parking braking motor assembly cooperate to output torque so as to drive the axial transmission assembly to push the pressing block to provide thrust for the friction plate, and after the parking braking, the axial transmission assembly is propped against the pressing block and is self-locked along the axial direction so as to maintain the required parking braking force; when the parking brake is released, the parking brake motor assembly or the service brake motor assembly and the parking brake motor assembly are matched to drive the axial transmission assembly to cancel pressing on the pressing block in the axial direction, and the return structure pushes the friction plate and the pressing block to retract.

As a further scheme of the utility model: the axial transmission assembly comprises a traveling transmission assembly and a parking transmission assembly which are coaxially arranged and rotationally connected through a connecting bearing, the traveling transmission assembly comprises a traveling gear and a ball screw, the ball screw comprises a screw rod and a traveling nut, and the traveling gear is connected with the screw rod and synchronously rotates with the screw rod; the parking transmission assembly comprises a parking gear, a force guide rod and a parking nut, the middle part of the force guide rod is in clearance fit in a central hole of the screw rod and is in rotary connection with the screw rod through the connecting bearing, the upper part of the force guide rod extends out of the upper end of the central hole of the screw rod, the parking gear is integrated on the upper part of the force guide rod, the lower part of the force guide rod extends out of the lower end of the central hole of the screw rod, the parking nut is in threaded connection with the lower part of the force guide rod, the parking nut is arranged below the driving nut, and the pressing blocks are nested on the lower parts of the parking nut and the driving nut and can be pushed by the parking nut and the driving nut along the axial direction;

During service braking, the service braking motor assembly drives the service gear to rotate and drives the screw rod to synchronously rotate, so that the service nut axially pushes the pressing block to apply thrust to the friction plate, and after service braking, the service braking motor assembly keeps continuously outputting an output moment matched with the required service braking force so as to maintain the required service braking force;

When in parking braking, the parking braking motor assembly drives the parking gear to rotate so as to drive the force guide rod to synchronously rotate, so that the parking nut downwards pushes the pressing block to apply thrust to the friction plate, or the driving braking motor assembly drives the driving gear to rotate so as to drive the screw rod to synchronously rotate, so that the driving nut downwards pushes the pressing block to apply thrust to the friction plate; after parking braking, the parking nut is propped against the pressing block, and the parking nut and the force guide rod are axially self-locked through threaded fit so as to maintain the required parking braking force.

As a further scheme of the utility model: the pressing block is provided with an inner hole for nesting the lower part of the travelling nut and the parking nut, and the hole wall of the inner hole is polygonal with matched shapes with the outer side wall of the lower part of the travelling nut and the outer side wall of the parking nut.

As a further scheme of the utility model: the bottom of the travelling crane nut is provided with an annular slope which can be matched with the bottom wall of the inner hole of the pressing block.

As a further scheme of the utility model: the bottom of the pressing block is abutted with the friction plate and is in rotation-stopping fit with the friction plate.

As a further scheme of the utility model: the friction plate comprises an inner friction plate and an outer friction plate which are oppositely arranged, the bottom of the pressing block is abutted against one side, far away from the outer friction plate, of the inner friction plate, and the pressing block is in rotation-stopping fit with the inner friction plate.

As a further scheme of the utility model: the upper end face of the travelling crane nut is provided with a protruding rotation stopping block, and the screw rod is provided with a first rotation stopping column matched with the rotation stopping block.

As a further scheme of the utility model: the driving gear is installed the lead screw upper end, just driving gear cover is established guide force pole upper portion, with the clearance fit between the guide force pole, the lead screw upper end is equipped with many bellied projection, driving gear lower extreme seted up with the post hole of projection one-to-one.

As a further scheme of the utility model: the center hole of the screw rod is internally provided with a first step, the middle part of the force guide rod is provided with a second step, and the connecting bearing is pressed between the first step and the second step.

As a further scheme of the utility model: the middle part of the force guide rod is in interference fit with the inner ring of the connecting bearing, and the outer ring of the connecting bearing is in interference fit with the central hole of the screw rod.

As a further scheme of the utility model: the axial transmission assembly further comprises a second planar bearing and a force bearing round platform, the force bearing round platform is rotatably connected to the upper end of the force guide rod through the second planar bearing, and the force sensor is installed above the force bearing round platform.

As a further scheme of the utility model: a wave spring is arranged between the bearing round table and the force sensor, and the wave spring is pre-tensioned between the bearing round table and the force sensor.

As a further scheme of the utility model: the driving brake motor assembly comprises a driving motor, a driving input gear, a fixing frame and a magnet which are coaxially arranged, wherein the driving input gear and the fixing frame are sleeved and fixed on a motor shaft of the driving motor, the magnet is embedded and fixed on the fixing frame, and an angle sensor which is arranged corresponding to the magnet is arranged on the ECU controller board; the parking brake motor assembly comprises a parking motor and a parking input gear fixedly mounted on a motor shaft of the parking motor.

As a further scheme of the utility model: the motor drive assembly further comprises a box body and an upper cover matched with the box body, the ECU controller board and the force sensor are all arranged in the box body, a middle plate is further arranged in the box body, an installation groove matched with the upper portion of the force sensor is formed in the middle plate, an opposite interface is formed in the bottom of the box body, the brake caliper body further comprises a caliper body, the friction plate is arranged in the caliper body, an installation step hole in butt joint with the opposite interface is formed in the top of the caliper body, a fifth step is arranged in the installation step hole, an assembly bearing is integrated on the upper portion of the axial transmission assembly, an outer ring of the assembly bearing is lapped on the fifth step, and the assembly bearing is in clearance fit with the installation step hole.

As a further scheme of the utility model: the inner wall of the mounting step hole is provided with a ring groove, and a damping ring for retarding the backing speed of the pressing block after braking is released is arranged in the ring groove.

As a further scheme of the utility model: the novel clamp is characterized in that a third step is arranged on the inner side of the butt joint, a fourth step is arranged on the outer side of the mounting step hole, the third step is abutted to the fourth step after assembly, and the box body and the clamp body are fixed through bolts.

As a further scheme of the utility model: the upper cover outside is equipped with service brake connector and parking brake connector, the upper cover inboard is equipped with service brake connector PIN needle, parking brake connector PIN needle and force sensor PIN needle, service brake connector PIN needle with the one end of parking brake connector PIN needle respectively with service brake connector with the parking brake connector is connected, after the assembly, the other end of service brake connector PIN needle the other end of parking brake connector PIN needle and the one end of force sensor PIN needle all with corresponding hole site on the ECU controller board is connected, the force sensor PIN needle other end with three scalable spring PIN needle contact of force sensor upper end.

As a further scheme of the utility model: the box body and the clamp body are arranged between the box body and the clamp body and are positioned at two sides of the installation step hole, and the driving motor of the driving brake motor assembly and the parking motor of the parking brake motor assembly are respectively arranged in the installation sections at two sides of the installation step hole.

The utility model has the beneficial effects that: the novel caliper assembly is arranged, the driving and parking brakes are integrated on one caliper, and compared with the scheme that the electronic parking calipers are additionally arranged, the vehicle space occupation and the vehicle quality are effectively reduced; and the driving and parking brakes can be mutually redundant through the axial transmission assembly, so that the braking safety is enhanced.

Drawings

The utility model is further described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of an electronic caliper assembly of the present utility model;

FIG. 2 is a disassembled view of the electronic caliper assembly of the present utility model;

FIG. 3 is a cross-sectional view of the electronic caliper assembly of the present utility model;

FIG. 4 is an exploded view of the motor drive assembly of the present utility model;

FIG. 5 is a cross-sectional view of the axial drive assembly of the present utility model;

FIG. 6 is an exploded view of the axial drive assembly of the present utility model;

FIG. 7 is an exploded view of a ball screw according to the present utility model;

FIG. 8 is a perspective view of an assembled bearing and lead screw of the present utility model;

FIG. 9 is a perspective view of a parking nut of the present utility model;

FIG. 10 is a perspective view of a compact of the present utility model;

FIG. 11 is a perspective view of the bottom of the pressure block of the present utility model;

FIG. 12 is a schematic view of the configuration of the drive assembly and parking drive assembly in cooperation with the axial drive assembly of the present utility model;

FIG. 13 is an exploded view of the drive train assembly of the present utility model;

FIG. 14 is a schematic view of the structure of the inner side of the upper cover of the present utility model;

FIG. 15 is a perspective view of the brake caliper body of the present utility model;

FIG. 16 is a perspective view of an inner friction plate according to the present utility model.

In the figure, 1, a motor driving assembly; 11. briquetting; 111. an inner bore; 112. a boss; 113. a rotation stopping groove; 12. an axial transmission assembly; 121. the driving transmission assembly; 1211. a driving gear; 1212. a screw rod; 12121. a first step; 1213. a travelling crane nut; 12131. an annular abutting portion; 1214. a rotation stop block; 1215. a first rotation stopping post; 1216. a convex column; 122. a park transmission assembly; 1221. a parking gear; 1222. a force guide rod; 12221. a second step; 12222. a sixth step; 1223. a parking nut; 12231. an annular slope; 123. a connecting bearing; 124. a second planar bearing; 125. force bearing round table; 126. a wave spring; 127. assembling a bearing; 13. a service brake motor assembly; 131. a travelling motor; 132. a driving input gear; 133. a fixing frame; 134. a magnet; 135. double-gear of travelling crane; 14. a parking brake motor assembly; 141. a parking motor; 142. a park input gear; 143. parking duplex gear; 144. a parking assist gear; 15. a force sensor; 16. an ECU controller board; 17. a case; 171. an interface; 172. a third step; 18. an upper cover; 181. a service brake connector; 182. a parking brake connector; 183. service brake connector PIN; 184. parking brake connector PIN; 185. a force sensor PIN needle; 19. an intermediate plate; 191. a mounting groove; 2. a brake caliper body; 21. a friction plate; 211. an inner friction plate; 2111. a second rotation stopping post; 212. an outer friction plate; 22. a clamp body; 221. installing a step hole; 222. a fourth step; 223. a fifth step; 224. a ring groove; 23. a return structure; 3. a brake disc.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described 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.

It should be noted that the terms "first," "second," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The description of the present utility model in terms of "left", "right", "upper", "lower", "top", "bottom", etc. directions are defined based on the relationship of orientation or position shown in the drawings, and are merely for convenience of description and simplification of description, rather than to indicate or imply that the described structure must be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present utility model. In the description of the present utility model, the meaning of "plurality" is two or more unless specifically defined otherwise.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-4, the utility model is an electronic caliper assembly integrating service braking and electronic parking, which comprises a motor driving assembly 1 and a caliper body 2.

The brake caliper body 2 comprises a friction plate 21 for braking the brake disc 3 and a return structure 23 for pushing the friction plate 21 to be separated from the brake disc;

The motor drive assembly 1 comprises a pressing block 11 for pushing a friction plate 21, an axial transmission assembly 12 for converting a rotation moment into an axial force and providing the axial transmission assembly 12 with the pressing block 11, a service brake motor assembly 13 and a parking brake motor assembly 14 for providing the axial transmission assembly 12 with the rotation moment, a force sensor 15 for detecting the magnitude of the braking force of the friction plate 21 to the brake disc 3, and an ECU controller board 16 for acquiring the braking force required during braking and controlling the output moment of the service brake motor assembly 13 and the operation of the parking brake motor assembly 14 according to the required braking force and the braking force detected by the force sensor 15;

During service braking, the driving brake motor assembly 13 outputs torque to drive the axial transmission assembly 12 to push the pressing block 11 to provide thrust for the friction plate 21, so that the friction plate 21 gradually clamps the brake disc 3, and after service braking, the driving brake motor assembly 13 keeps continuously outputting the output torque matched with the required driving brake force so as to maintain the required driving brake force; when the service brake is released, the service brake motor assembly 13 stops outputting torque to cancel the axial pressing of the pressing block 11 by the axial transmission 12 assembly, and the return structure 23 pushes the friction plate 21 and the pressing block 11 to retract;

During parking braking, the parking brake motor assembly 14 or the service brake motor assembly 13 and the parking brake motor assembly 14 cooperate to output torque to drive the axial transmission assembly 12 to push the pressing block 11 to provide thrust for the friction plate 21, so that the friction plate 21 gradually clamps the brake disc 3, and after parking braking, the axial transmission assembly 12 abuts against the pressing block 11 and is self-locked in the axial direction to maintain the required parking braking force; when the parking brake is released, the parking brake motor assembly 14 or the service brake motor assembly 13 and the parking brake motor assembly 14 are matched to drive the axial transmission assembly 12 to cancel the pressing of the pressing block 11 in the axial direction, and the return structure 23 pushes the friction plate 21 and the pressing block 11 to retract.

Specifically, the parking brake motor assembly 14 and the service brake motor assembly 13 are respectively arranged at two sides of the axial transmission assembly 12, and the axial directions of the parking brake motor assembly, the service brake motor assembly and the service brake motor assembly are parallel. In this embodiment, the axial directions of the axial transmission assembly 12, the service brake motor assembly 13 and the parking brake motor assembly 14 are all along the vertical direction.

Referring to fig. 5 and 6, the axial drive assembly 12 includes a drive assembly 121 and a park drive assembly 122 coaxially disposed and rotatably coupled by an adapter bearing 123.

The traveling gear assembly 121 includes a traveling gear 1211 and a ball screw. The ball screw includes a screw 1212 and a driving nut 1213, and the driving nut 1213 is screw-driven on the screw 1212 so that the screw 1212 may convert a rotational motion thereof into a linear motion of the driving nut 1213, or the linear motion of the driving nut 1213 may be converted into a rotational motion of the screw 1212. The driving gear 1211 is connected with the screw 1212 and drives the screw 1212 to rotate synchronously. The screw 1212 has a central hole penetrating in the axial direction.

The parking transmission assembly 122 comprises a parking gear 1221, a force guide rod 1222 and a parking nut 1223, wherein the middle part of the force guide rod 1222 is in clearance fit in a central hole of the screw rod 1212, the connecting bearing 123 is arranged in the central hole of the screw rod 1212 and sleeved in the middle part of the force guide rod 1222, and the connecting bearing 123 is used for rotationally connecting the force guide rod 1222 and the screw rod 1212, so that the screw rod 1212 and the force guide rod 1222 can relatively rotate, and mutual interference between the rotation moment of the follow-up service brake and the rotation moment of the parking brake is avoided. The upper portion of the force guide rod 1222 extends from the upper end of the central hole of the screw 1212, and a parking gear 1221 is integrated on the upper portion of the force guide rod 1222, so that the parking gear 1221 rotates in synchronization with the force guide rod 1222. The lower part of the force guide rod 1222 extends from the lower end of the central hole of the screw rod 1212, a thread is arranged on the side wall of the lower part of the force guide rod 1222, and a parking nut 1223 is in threaded connection with the lower part of the force guide rod 1222, so that the force guide rod 1222 is self-locked along the axial direction, and the parking nut 1223 can only move along the axial direction under the rotation action of the force guide rod 1222 and cannot drive the force guide rod 1222 to rotate reversely under the action of the axial force.

Referring to fig. 5 and 10, a parking nut 1223 is disposed below the driving nut 1213, an inner hole 111 is formed in the pressing block 11, the inner hole 111 has a peripheral wall and a bottom wall, the pressing block 11 is nested outside the parking nut 1223 and the lower portion of the driving nut 1213 through the inner hole 111, the parking nut 1223 can abut against the bottom wall of the inner hole 111, and an annular abutting portion 12131 capable of abutting against the upper end face of the pressing block 11 is disposed in the middle of the outer side of the driving nut 1213. The driving brake motor assembly 13 drives the screw rod 1212 to rotate through the driving gear 1211 so as to enable the driving nut 1213 to axially move to push the pressing block 11. The parking brake motor assembly 14 drives the force guide rod 1222 to rotate through the parking gear 1221, so that the parking nut 1223 moves the push block 11 in the axial direction.

Further, the bottom of the parking nut 1223 is provided with an annular slope 12231 adapted to be abutted against the bottom wall of the inner hole 111, so as to increase the contact area between the parking nut 1223 and the bottom wall of the inner hole 111, and facilitate the transmission of axial force between the two. The peripheral wall of the inner hole 111 and the outer side wall of the lower part of the travelling nut 1213 and the outer side wall of the parking nut 1223 are polygonal, which are matched in shape, so that the pressing block 11 rotates synchronously with the travelling nut 1213 and the parking nut 1223, and friction loss is avoided.

Referring to fig. 7 and 8, in the present embodiment, a protruding rotation stop block 1214 is disposed on an upper end surface of a travelling nut 1213, and a first rotation stop post 1215 matching with the rotation stop block 1214 is disposed on a screw 1212, so that self-locking between the travelling nut 1213 and the screw 1212 can be avoided when the two are matched. Illustratively, when the braking of the brake disc 3 is released, the friction plate 21 is retracted and separated from the brake disc 3, the pressing block 11 is driven by the reverse thrust of the friction plate 21 to drive the driving nut 1213 to axially move along the screw rod 1212, so as to drive the screw rod 1212 to rotate in the driving nut 1213, and when the screw rod 1212 moves to a certain position relative to the driving nut 1213, the first rotation stopping post 1215 stops the rotation stopping block 1214, so as to avoid over-screwing between the screw rod 1212 and the driving nut 1213 and self-locking.

The driving gear 1211 is installed at the upper end of the screw 1212, a plurality of protruding posts 1216 (see fig. 7) are provided at the upper end of the screw 1212, post holes (not shown) matching with the posts 1216 one by one are provided at the lower end of the driving gear 1211, and the driving gear 1211 and the screw 1212 are connected by matching with each other, so that the driving gear 1211 can drive the screw 1212 to rotate synchronously. At this time, the driving gear 1211 is sleeved on the upper portion of the force guiding rod 1222 and is in clearance fit with the force guiding rod 1222, so that the rotation of the driving gear 1211 is prevented from affecting the force guiding rod 1222.

Referring to fig. 5, in order to facilitate the installation of the force guiding rod 1222, the engagement bearing 123 and the screw rod 1212, a first step 12121 is provided in a central hole of the screw rod 1212, the force guiding rod 1222 is a diameter-variable round rod, a second step 12221 is provided in the middle of the force guiding rod 1222, and after assembly, the second step 12221 is located above the first step 12121 in the vertical direction, the engagement bearing 123 is pressed between the first step 12121 and the second step 12221, so that the force guiding rod 1222 is rotationally connected with the screw rod 1212. In one embodiment, exemplary engagement bearing 123 is a first planar bearing, where the first planar bearing is in clearance fit with both guide rod 1222 and lead screw 1212 to avoid interference with relative rotation between guide rod 1222 and lead screw 1212. In another embodiment, the engagement bearing 123 may be a roller bearing that is press fit with the guide rod 1222 and is in a clearance fit with the screw 1212.

Referring to fig. 5 and 6, the axial transmission assembly 12 further includes a second planar bearing 124 and a force-bearing round table 125, the force-bearing round table 125 is rotatably connected to the upper end of the force-guiding rod 1222 through the second planar bearing 124, the upper end of the force-guiding rod 1222 is provided with a sixth step 12222, and the second planar bearing 124 is sleeved on the sixth step 12222, so that the planar bearing 125 is limited and fixed in the axial direction and the radial direction. The force sensor 15 is mounted above the force bearing circular table 125 to avoid the force sensor 15 from moving under the rotation of the force guide rod 1222 so that the force sensor 15 detects the magnitude of the braking force. Specifically, the reaction force of the friction plate 21 to the braking force of the brake disc 3 can be transmitted to the force sensor 15 through the pressing block 11-axial transmission assembly 12, so that the force sensor 15 detects the reaction force to further detect the braking force of the friction plate 21 to the brake disc 3.

Further, a wave spring 126 is arranged between the force bearing round table 125 and the force sensor 15, the wave spring 126 is in a compressed state after the assembly is completed, and the wave spring 126 is pre-tensioned between the force bearing round table 125 and the force sensor 15 and is used for fixing the force sensor 15 in the axial direction, so that the gap between the force sensor 15 and the force bearing round table 125 caused by part manufacturing errors is eliminated, and abnormal sound is generated.

Referring to fig. 3, the bottom of the pressing block 11 abuts against the friction plate 21 and is in anti-rotation fit with the friction plate 21, so that the situation that the pressing block 11 cannot generate braking thrust to the friction plate 21 due to the driving nut 1213 and the pressing block 11 are driven to synchronously rotate when the screw rod 1212 rotates, and the situation that the pressing block 11 cannot generate braking thrust to the friction plate 21 due to the driving nut 1223 and the pressing block 11 are driven to synchronously rotate when the force guide rod 1222 rotates are avoided. In this embodiment, the friction plate 21 includes an inner friction plate 211 and an outer friction plate 212 that are disposed opposite to each other, so that both the upper and lower sides of the brake disc 3 are braked. At this time, the bottom of the pressing block 11 abuts against one side of the inner friction plate 211 away from the outer friction plate 212, and is in rotation-stopping fit with the inner friction plate 211. For example, a plurality of bosses 112 (see fig. 11) arranged in an annular array are machined at the bottom of the pressing block 11, a stop groove 113 is formed between adjacent bosses 112, a second rotation stopping column 2111 (see fig. 16) matched with the stop groove 113 is formed at the back of the inner friction plate 211, and when the pressing block 11 abuts against the inner friction plate 211, the second rotation stopping column 2111 is matched in the rotation stopping groove 113, so that the pressing block 11 and the inner friction plate 211 can be prevented from rotating relatively, and the pressing block 11, a travelling nut 1213 and a parking nut 1223 connected with the pressing block can only move downwards along the vertical direction when the screw rod 1212 and the force guiding rod 1222 rotate respectively.

Referring to fig. 12 and 13, the service brake motor assembly 13 includes a service motor 131, a service input gear 132, a fixing frame 133 and a magnet 134 coaxially disposed, wherein the service input gear 132 and the fixing frame 133 are both sleeved on a motor shaft of the service motor 131, the magnet 134 is fixedly embedded on the fixing frame 133, an angle sensor (not shown) is disposed on the ECU controller board 16 and corresponds to the magnet 134, the angle sensor can accurately detect the rotation angle of the service motor 131 according to the rotation angle of the magnet 134, so that the ECU controller board 16 reasonably adjusts the output torque of the service motor 131 according to the required braking force, the service life of the service motor 131 is prolonged, the motor shaft of the service motor 131 is balanced under the interaction of the output torque of the service motor 131 and the reactive force of the braking force during braking, and a static state is maintained. And the built-in angle sensor is matched with the force sensor 15, so that the gap between the inner friction plate 211 and the gap between the outer friction plate 212 and the brake disc 3 can be dynamically adjusted, and the dragging moment of the brake caliper body 2 can be effectively reduced, so that the kinetic energy consumption of a vehicle is reduced. The left braking force and the right braking force of the vehicle can be well balanced, and the driving is more complete and stable.

In this embodiment, in order to facilitate the driving input gear 132 to drive the driving gear 1211 to rotate, the driving input gear 132 is indirectly meshed with the driving gear 1211 through the driving duplex gear 135.

The parking brake motor assembly 14 includes a parking motor 141 and a parking input gear 142 fixedly installed on a motor shaft of the parking motor 141, the parking input gear 142 being indirectly engaged with a parking gear 1221 through a parking duplex gear 143 and a parking auxiliary gear 144.

Referring to fig. 2-4, in an embodiment, the motor driving assembly 1 further includes a housing 17 and an upper cover 18 adapted to the housing 17, where the upper cover 18 is used to cover a top opening of the housing 17 and is fixedly connected to the housing 17 through bolts. The ECU controller board 16 and the force sensor 15 are both arranged in the box 17, the box 17 is internally provided with a middle board 19, the middle board 19 can be fixedly arranged in the box 17 through bolts, the ECU controller board 16 is fixedly arranged above the middle board 19, the force sensor 15 is arranged below the middle board 19, the middle board 19 is provided with a mounting groove 191 which is matched with the upper part of the force sensor 15, the upper part of the force sensor 15 is arranged in the mounting groove 191, the upper limit of the force sensor 15 is limited, and at the moment, the lower part of the force sensor 15 is limited by the force bearing round table 125.

Referring to fig. 14, a service brake connector 181 and a parking brake connector 182 are disposed on the outer side of the upper cover 18, a service brake connector PIN 183, a parking brake connector PIN 184 and a force sensor 15PIN are disposed on the inner side of the upper cover 18, one ends of the service brake connector PIN 183 and the parking brake connector PIN 184 are connected with the service brake connector 181 and the parking brake connector 182 respectively, after assembly, the other ends of the service brake connector PIN 183 and the parking brake connector PIN 184 are connected with corresponding holes on the ECU controller board 16, and external devices can be connected with the ECU controller board 16 by connecting the service brake connector 181 and the parking brake connector 182 for signal transmission. One end of a PIN needle of the force sensor 15 is connected with a corresponding hole site on the ECU controller board 16, and the other end of the PIN needle of the force sensor 15 is contacted with three retractable spring PIN needles at the upper end of the force sensor 15, so that the force sensor 15 is electrically connected with the ECU controller board 16, and the ECU controller board 16 can conveniently acquire the reaction force value detected by the force sensor 15.

Referring to fig. 3 and 15, in this embodiment, the caliper body 2 is a floating caliper in the prior art, specifically, the caliper body 2 further includes a caliper body 22, an inner friction plate 211 and an outer friction plate 212 are disposed in the caliper body 22 at intervals, and the brake disc 3 is disposed between the inner friction plate 211 and the outer friction plate 212. The return structure 23 adopts elastic spring plate structure, both ends of the inner friction plate 211 and the outer friction plate 212 are respectively provided with an independent return structure 23, when braking, the pressing block 11 pushes the inner friction plate 211 to move downwards to perform friction braking on the upper surface of the brake disc 3, the outer friction plate 212 moves upwards to brake the lower surface of the brake disc 3 under the thrust of the pressing block 11, in the process, the return structure 23 connected with the inner friction plate 211 and the outer friction plate 212 is stretched or compressed to store force, when braking is released, the thrust provided by the pressing block 11 disappears, and the return structure 23 rebounds to drive the inner friction plate 211 and the outer friction plate 212 to separate from the brake disc 3. In other embodiments, the return structure 23 may be replaced by other structures with active thrust or passive thrust, so that when the thrust of the pressing block 11 disappears, the inner friction plate 211 and the outer friction plate 212 are driven to separate from the brake disc 3.

In this embodiment, the top of the pliers body 22 is provided with a mounting step hole 221, the outer side of the mounting step hole 221 is provided with a fourth step 222, the bottom of the box 17 is provided with a butt joint port 171 which is in butt joint with the mounting step hole 221, the inner side of the butt joint port 171 is provided with a third step 172, after assembly, the pliers body 22 is arranged at the bottom of the box 17, the mounting step hole 221 of the pliers body 22 is in butt joint with the butt joint port 171 of the box 17, the third step 172 is abutted against the fourth step 222, the box 17 is fixedly connected with the pliers body 22 through a bolt, and a sealing ring is arranged between the butt joint port 171 and the mounting step hole 221, so that the two are in sealing connection.

The fifth step 223 is arranged in the mounting step hole 221, the assembly bearing 127 is integrated at the upper part of the axial transmission assembly 12, in this embodiment, the assembly bearing 127 is integrated at the upper part of the screw rod 1212, so that the inner ring of the assembly bearing 127 is axially fixed with the screw rod 1212, the outer ring of the assembly bearing 127 is lapped on the fifth step 223, the thrust force generated by the gravity of the axial transmission assembly 12 and the pressing block 11 on the inner friction plate 211 is avoided, and the detection accuracy of the force sensor 15 is improved. The assembly bearing 127 is in clearance fit with the mounting step hole 221, so that the reaction force can be smoothly transmitted to the force sensor 15 through the axial transmission assembly 12, and the situation that the reaction force of the friction plate 21 borne by the pressing block 11 is blocked in the transmission process due to the fact that the assembly bearing 127 is embedded in the mounting step hole 221 is avoided.

Referring to fig. 3, an annular groove 224 is formed on the inner wall of the mounting step hole 221, and a damping ring (not shown) is mounted in the annular groove 224, and when the brake of the brake disc 3 is released, the damping ring blocks the retraction of the pressing block 11, so as to prevent the pressing block 11 from being retracted too much and being separated from the inner friction plate 211, and the second rotation stopping column 2111 is separated from the rotation stopping groove 113, so that the rotation stopping matching relationship between the pressing block 11 and the inner friction plate 211 is damaged; in addition, the damping ring can laterally support the pressing block 11, so that damage and abnormal sound of parts caused by direct impact between the damping ring and the inner wall of the mounting step hole 221 during braking are avoided.

In this embodiment, the installation step hole 221 is provided with a protrusion, after assembly, a certain installation interval is provided between the clamp body 22 and the box body 17 and at two sides of the installation step hole 221, and the driving motor 131 and the parking motor 141 are both arranged between the box body 17 and the clamp body 22 and respectively located in the installation intervals at two sides of the installation step hole 221, so that the electronic clamp assembly integrated with driving braking and electronic parking is more compact in overall structure. At this time, the parking input gear 142, the parking duplicate gear 143, the parking assist gear 144, the parking gear 1221, the drive input gear 132, the drive duplicate gear 135, and the drive gear 1211 are provided in the case 17.

Service braking working condition: when the driver steps on the brake pedal for a certain stroke, the ECU controller board 16 receives the required driving braking force when the driver brakes currently, controls the driving motor 131 to start rotating, transmits the rotating moment to the screw rod 1212 through the driving input gear 132, the driving duplex gear 135 and the driving gear 1211, the screw rod 1212 pushes the driving nut 1213 to push the pressing block 11 downwards to apply pushing force to the inner friction plate 211 and the outer friction plate 212 through threads, so that the inner friction plate 211 and the outer friction plate 212 gradually clamp the brake disc 3, and the reaction force of the friction plate 21 (comprising the inner friction plate 211 and the outer friction plate 212) to the braking force of the brake disc 3 is transmitted to the force sensor 15 along the pressing block 11, the driving nut 1213, the screw rod 1212, the connecting bearing 123, the force guide rod 1222 and the second plane bearing 124, and the force guide table 125 to be detected until the reaction force detected by the force sensor 15 reaches the required driving braking force, and the driving motor 131 keeps the current output moment to maintain the braking force. After the driver releases the brake pedal completely, the driving motor 131 stops outputting torque, and the driving nut 1213 and the screw rod 1212 form a ball screw structure together, no self-locking characteristic exists between the driving nut 1213 and the screw rod 1212, the driving nut 1213 can drive the screw rod 1212 to rotate relatively under the action of the reaction force, at this time, the friction plate 21 is retracted and separated from the brake disc 3 under the driving of the return structure 23, and the inner friction plate 211 drives the pressing block 11 and the driving nut 1213 connected with the pressing block 11 to retract for a certain distance.

It should be clear that the required running braking force received by the ECU controller board 16 during the current running braking will change according to the change of the travel of the brake pedal of the vehicle, when the travel of the brake pedal changes, the required running braking force will change, and the running motor 131 will increase or decrease the output torque to match the required braking force of the current vehicle, i.e. during the running braking, the output torque of the running motor 131 will change along with the travel of the brake pedal, which is a dynamic adjustment process.

Parking brake operating conditions:

First working condition: when the vehicle is in a stationary state and the brake pedal is not stepped on, the parking brake can be performed by adopting the mutual matching of the service brake motor assembly 13 and the parking brake motor assembly 14, at the moment, after a driver presses an electronic parking button, the ECU controller board 16 controls the service motor 131 to start rotating, and transmits the rotating moment to the screw rod 1212 through the service input gear 132-service duplex gear 135-service gear 1211, the screw rod 1212 pushes the pressing block 11 downwards through the threads to apply thrust force to the inner friction plate 211 and the outer friction plate 212, so that the inner friction plate 211 and the outer friction plate 212 gradually clamp the brake disc 3 to perform parking brake, during the whole process, the reaction force of the inner friction plate 211 and the outer friction plate 212 to the braking force of the brake disc 3 can be transmitted to the force sensor 15 along the pressing block 11-service nut 1213-screw rod 1212-connecting bearing 123-force guide rod 1222-second plane bearing 124-force circular table 125, when the reaction force detected by the force sensor 15 reaches the preset braking force, the corresponding output moment is continuously output to maintain the required braking force, the pressing block 11 and the motor 11 is separated from the motor 1213, and the parking force is transmitted to the parking rod 1222 through the gear 141 and the parking guide rod 1222 is tightly pressed on the parking rod 1222 through the threads, and the parking brake is stopped by the rotating of the inner friction plate 211 and the outer friction plate 212 and the parking brake plate 1222 is tightly pressed on the parking brake disc 1222 through the rotating of the gear wheel drive motor drive gear 141 and the pressing plate 141, the parking braking force that would otherwise be maintained by the service motor 131 is maintained by the parking nut 1223. When the parking brake of the vehicle needs to be released, the driving motor 131 works first and continuously outputs the torque required by the current parking brake force, the driving nut 1213 is pushed to abut against the pressing block 11, then the parking motor 141 starts to work, the parking nut 1223 is retracted and released from the pressing block 11 until the parking brake is returned to the initial position, at the moment, the parking brake force required by the vehicle is maintained by the driving motor 131 until the vehicle runs, and the driving motor 131 correspondingly stops working. In this process, the parking motor 141 and the driving motor 131 work alternately to maintain the braking force required for parking the vehicle, so that the situation that the vehicle slips after releasing the parking can be avoided, and in this case, the low-power parking motor 141 can be used (the main braking forces of the driving brake and the parking brake working conditions are ensured by the driving brake motor, and the parking motor 141 only needs to control the axial position of the parking nut 1223).

Under the working condition, when the parking brake motor assembly 14 is only adopted for parking braking, the working process is as follows: after the driver presses the electronic parking button, the ECU controller board 16 controls the parking motor 141 to start rotating and transmits the rotating moment to the force guide rod 1222 through the parking input gear 142, the parking duplex gear 143, the parking auxiliary gear 144 and the parking gear 1221, the force guide rod 1222 pushes the parking nut 1223 to push the pressing block 11 downwards to apply thrust to the inner friction plate 211 and the outer friction plate 212 through threads, so that the inner friction plate 211 and the outer friction plate 212 gradually clamp the brake disc 3 to perform parking braking, and in the process, the reaction force of the braking force of the inner friction plate 211 and the outer friction plate 212 to the brake disc 3 is transmitted to the force sensor 15 along the pressing block 11, the parking nut 1223, the force guide rod 1222, the second plane bearing 124 and the force bearing round table 125. Until the reaction force received by the force sensor 15 reaches the preset parking braking force, the parking motor 141 stops working, at this time, the parking nut 1223 is axially self-locked on the force guide rod 1222 under the action of the screw thread, and the pressing block 11 keeps applying thrust to the inner friction plate 211 and the outer friction plate 212 under the abutting of the parking nut 1223, so as to maintain the parking braking force.

In this working condition, only the parking brake motor assembly 14 may be driven to release the parking brake, and the working process is as follows: the parking motor 141 is started to drive the guide rod 1222 and the parking nut 1223 in a spiral way, the parking nut 1223 retreats towards the side far away from the pressing block 11, the inner friction plate 211 and the pressing block 11 retreats along with the parking nut 1223 under the rebound action of the return structure 23, the outer friction plate 212 retreats towards the direction opposite to the inner friction plate 211 under the rebound action of the return structure 23, the inner friction plate 211 and the outer friction plate 212 are thoroughly separated from the brake disc 3, and the parking brake is released.

In the second working condition, after the brake pedal is depressed, the vehicle is decelerated to a standstill and then is subjected to parking braking, at this time, the driving nut 1213 applies thrust to the inner friction plate 211 and the outer friction plate 212 through the pressing block 11, the parking nut 1223 is in a separated state from the pressing block 11, then the parking button is pressed down to perform parking braking, the parking motor 141 works to tightly attach the parking nut 1223 to the pressing block 11 through a series of transmission structures, then the parking motor 141 and the driving motor 131 stop working, and the parking braking force originally maintained by the driving motor 131 is maintained by the parking nut 1223. The vehicle parking brake release process is the same as the above-described conditions and will not be described in detail herein.

The foregoing describes one embodiment of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and is not to be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims

1. An electronic caliper assembly integrating service braking and electronic parking is characterized by comprising a motor driving assembly and a brake caliper body,

2. The electronic caliper assembly of claim 1, wherein the axial transmission assembly comprises a service transmission assembly and a parking transmission assembly coaxially disposed and rotationally connected by a tie bearing, the service transmission assembly comprising a service gear and a ball screw, the ball screw comprising a screw and a service nut, the service gear being connected to the screw and rotating in synchronization with the screw; the parking transmission assembly comprises a parking gear, a force guide rod and a parking nut, wherein the middle part of the force guide rod is in clearance fit in a central hole of the screw rod and is in rotary connection with the screw rod through a connecting bearing, the upper part of the force guide rod extends out of the upper end of the central hole of the screw rod, the parking gear is integrated on the upper part of the force guide rod, the lower part of the force guide rod extends out of the lower end of the central hole of the screw rod, the parking nut is in threaded connection with the lower part of the force guide rod, the parking nut is arranged below the driving nut, and the pressing blocks are nested on the lower parts of the parking nut and the driving nut and can be pushed by the parking nut and the driving nut along the axial direction.

3. The electronic caliper assembly of claim 2, wherein the pressing block is provided with an inner hole for nesting the lower portion of the traveling nut and the parking nut, and the hole wall of the inner hole is polygonal in shape matching with the outer side wall of the lower portion of the traveling nut and the outer side wall of the parking nut.

4. An electronic caliper assembly according to claim 3, wherein the bottom of the service nut is provided with an annular ramp adapted to the bottom wall of the inner bore.

5. The electronic caliper assembly of claim 3, wherein the bottom of the pressure block abuts the friction plate and is in a rotationally fixed engagement with the friction plate.

6. The electronic caliper assembly of claim 3, wherein the friction plates include oppositely disposed inner and outer friction plates, and the bottom of the pressure block abuts a side of the inner friction plate away from the outer friction plate and is in a rotationally fixed engagement with the inner friction plate.

7. The electronic caliper assembly of claim 2, wherein a raised anti-rotation block is provided on an upper end surface of the service nut, and a first anti-rotation post is provided on the lead screw that mates with the anti-rotation block.

8. The electronic caliper assembly of claim 2, wherein the driving gear is mounted at the upper end of the screw rod, the driving gear is sleeved on the upper portion of the force guide rod and in clearance fit with the force guide rod, a plurality of raised convex columns are arranged at the upper end of the screw rod, and column holes which are matched with the convex columns one by one are formed at the lower end of the driving gear.

9. The electronic caliper assembly of claim 2, wherein a first step is disposed in the central bore of the lead screw, a second step is disposed in the middle of the force-guiding rod, and the engagement bearing is press-fit between the first step and the second step.

10. The electronic caliper assembly of claim 9, wherein the adapter bearing is a first planar bearing that is in clearance fit with both the force lever and the lead screw.

11. The electronic caliper assembly of claim 2, wherein the axial drive assembly further comprises a second planar bearing and a force-bearing boss rotatably coupled to the upper end of the force-guiding rod by the second planar bearing, the force sensor being mounted above the force-bearing boss.

12. The electronic caliper assembly of claim 11, wherein a wave spring is disposed between the force bearing boss and the force sensor, the wave spring being preloaded between the force bearing boss and the force sensor.

13. The electronic caliper assembly according to claim 2, wherein the service brake motor assembly comprises a service motor, a service input gear, a fixing frame and a magnet which are coaxially arranged, wherein the service input gear and the fixing frame are both sleeved and fixed on a motor shaft of the service motor, the magnet is embedded and fixed on the fixing frame, and an angle sensor which is arranged corresponding to the magnet is arranged on the ECU controller board; the parking brake motor assembly comprises a parking motor and a parking input gear fixedly mounted on a motor shaft of the parking motor.

14. The electronic caliper assembly of any one of claims 1-13, wherein the motor drive assembly further comprises a housing and an upper cover adapted to the housing, the ECU controller board and the force sensor are both disposed in the housing, an intermediate plate is further disposed in the housing, a mounting groove adapted to the upper portion of the force sensor is disposed in the intermediate plate, an opposite interface is disposed at the bottom of the housing, the brake caliper body further comprises a caliper body, the friction plate is disposed in the caliper body, a mounting step hole for abutting the opposite interface is disposed at the top of the caliper body, a fifth step is disposed in the mounting step hole, an assembly bearing is integrated at the upper portion of the axial drive assembly, an outer ring of the assembly bearing is overlapped on the fifth step, and a gap is disposed between the assembly bearing and the mounting step hole.

15. The electronic caliper assembly of claim 14, wherein an annular groove is formed in an inner wall of the mounting stepped hole, and a damping ring for retarding a retraction speed of the pressing block after releasing the brake is installed in the annular groove.

16. The electronic caliper assembly of claim 14, wherein a third step is provided on the inside of the interface, a fourth step is provided on the outside of the mounting step hole, the third step abuts against the fourth step after assembly, and the case is fastened to the caliper body by a bolt.

17. The electronic caliper assembly of claim 14, wherein a service brake connector and a parking brake connector are disposed on the outer side of the upper cover, a service brake connector PIN, a parking brake connector PIN and a force sensor PIN are disposed on the inner side of the upper cover, one ends of the service brake connector PIN and the parking brake connector PIN are connected with the service brake connector and the parking brake connector respectively, and after assembly, the other ends of the service brake connector PIN, the parking brake connector PIN and the force sensor PIN are connected with corresponding hole sites on the ECU controller board, and the other ends of the force sensor PIN are in contact with three retractable spring PINs on the upper end of the force sensor.

18. The electronic caliper assembly of claim 14, wherein an installation section is provided between the housing and the caliper body and on both sides of the installation step hole, and a service motor of the service brake motor assembly and a parking motor of the parking brake motor assembly are respectively provided in the installation section on both sides of the installation step hole.