Arrangement structure of wheel end brake controller, brake device, wheel assembly and vehicle

Abstract

The invention discloses an arrangement structure of a wheel end brake controller, which comprises a wheel rim, an electric control brake caliper and a driving shaft, the electric control brake caliper comprises an electronic control unit, a motor gear unit and a brake caliper assembly, the electronic control unit at least comprises a circuit board, the circuit board is arranged at the end part of the brake caliper assembly, and the motor gear unit is connected with the circuit board. The distance between the middle portion of the circuit board and the axis of the wheel rim is larger than the distance between the caliper cylinder hole and the axis of the wheel rim. According to the arrangement structure of the wheel end brake controller, the electrically-controlled brake calipers can be easily arranged in the wheel rim, the requirement for space arrangement of a whole vehicle can be met, and the electrically-controlled brake calipers cannot interfere with parts in the rim.

Description

Technical Field

[0001] The present invention belongs to the technical field of brake systems, and in particular, relates to an arrangement structure of a wheel-end brake controller, a brake device, a wheel assembly and a vehicle. Background Art

[0002] The space for arranging the braking system at the wheel end is very limited. Most car models have suspension, drive and steering systems at the wheel end. When the car is turning, the wheel will swing left and right around the Z-axis of the vehicle coordinate system. When the car is bumpy, the wheel will jump up and down relative to the X-axis and Y-axis of the vehicle coordinate system. The electric control brake caliper can easily interfere with the components in the rim. For example, components such as the drive shaft, fork arm, rim and steering knuckle limit the space of the X-axis or Z-axis of the electric control brake caliper. Components such as the drive shaft and air spring limit the Y-axis space of the electric control brake caliper, making it difficult to arrange the electric control brake caliper.

[0003] Therefore, there are many difficulties in the design and development of EMB. On the one hand, the Y-axis dimension needs to be reduced, which will squeeze the space for electronic components, so it is necessary to find an effective layout space for electronic components. On the other hand, under the condition of consistent Y-axis dimension, it is easier to interfere with the drive shaft, so it is necessary to find a way to adapt to more car models under the condition of consistent Y-axis dimension.

[0004] For example, in the technical solution disclosed in the patent document with authorization announcement number CN218817770U, a double-layer circuit board is arranged in a staggered manner at the top. Although this design can integrate the ECU and MGU on the brake caliper assembly, which is beneficial to improving the response speed of the system and improving the reliability of the system, it also makes the brake caliper assembly design more compact. However, this structure occupies more axial or circumferential space, resulting in the risk of not being able to adapt to more vehicle models.

[0005] Specifically, in the technical solution disclosed in the above patent document, the shape of the ECU housing matches the shape of the internal circuit board. The ECU housing has a stepped structure, which meets the layout requirements of the double-layer circuit board and can solve the interference problem of some parts (such as the drive shaft). However, arranging the double-layer circuit board at the top causes the overall volume of the brake caliper to be larger, and it takes up more axial space when arranged inside the rim. Therefore, when it is arranged in a wheel hub with a smaller space, the brake caliper is prone to interfere with the wheel hub. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a layout structure of a wheel-end brake controller, the purpose of which is to avoid interference between the brake caliper and the components in the wheel rim, and to adapt to more vehicle models.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a layout structure of a wheel-end brake controller, including a wheel rim, an electronically controlled brake caliper and a drive shaft, the electronically controlled brake caliper includes an electronic control unit, a motor gear unit and a brake caliper assembly, the electronic control unit includes at least one circuit board, the circuit board is arranged at the end of the brake caliper assembly, and is offset radially away from the center of the rim, and the distance between the middle part of the circuit board and the axis of the wheel rim is greater than the distance between the caliper cylinder hole and the axis of the wheel rim.

[0008] The circuit board is arranged perpendicular to the axial direction of the wheel rim.

[0009] The circuit board is arranged in a single layer.

[0010] The circuit board is provided with electronic components with a height greater than 7 mm.

[0011] The electronic components with a relatively high axial height are located at the non-overlapping portion between the circuit board and the gear transmission mechanism at the upper end.

[0012] The gear transmission mechanism is arranged at the lower end of the circuit board, and the intermediate transmission gear is arranged offset in a radial direction away from the center of the rim.

[0013] The electronically controlled brake caliper further includes a locking mechanism which is axially arranged at a lower end of an intermediate transmission gear of the offset gear transmission mechanism.

[0014] The area of ​​the circuit board in the direction away from the center of the rim is larger than the area of ​​the motor gear unit in the direction away from the center of the rim.

[0015] The middle portion of the circuit board is bent in a radial direction away from the center of the wheel rim.

[0016] The locking mechanism includes an electrical connector, and the electrical connector is connected to the circuit board along the outer side of the motor gear unit.

[0017] The electronic control unit further includes a housing and a housing cover, which are located on the upper and lower sides of the circuit board.

[0018] The electronic control unit is connected to the motor gear unit via a fastener, and the brake caliper assembly is connected to the motor gear unit via a fastener.

[0019] The present invention also provides a braking device, comprising the arrangement structure of the wheel end brake controller.

[0020] The present invention also provides a wheel assembly, comprising the braking device.

[0021] The present invention also provides a vehicle, comprising the wheel assembly.

[0022] The layout structure of the wheel-end brake controller of the present invention adopts an offset layout of a single-layer circuit board and a caliper cylinder hole, so that the electric-controlled brake caliper has a lower axial height to make the overall volume smaller. At the same time, the offset single-layer circuit board can allow the drive shaft to obtain a wider rotation angle, so that the electric-controlled brake caliper is easy to arrange in the wheel rim, which can meet the requirements of the space layout of the whole vehicle. The electric-controlled brake caliper will not interfere with the components in the rim and can be adapted to more wheel rims of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] This specification includes the following drawings, which show the following contents:

[0024] Figure 1 It is a schematic diagram of the space limitation of the brake caliper in the radial direction inside the wheel rim;

[0025] Figure 2 It is a schematic diagram of the arrangement of the brake caliper in the wheel rim;

[0026] Figure 3 It is a schematic diagram of the space limitation of the brake caliper in the axial direction of the wheel rim;

[0027] Figure 4 It is a schematic diagram of the utilization of the space below the offset part of the brake caliper;

[0028] Figure 5 It is a schematic diagram of the partial structure of the electronically controlled brake caliper;

[0029] Figure 6 It is a schematic diagram of the structure of the circuit board (PCBA);

[0030] The markings in the figure are: 1. Electronically controlled brake caliper; 101. Electronic control unit; 1011. Shell cover; 1012. PCBA (circuit board); 1013. Shell; 102. Motor gear unit; 103. Brake caliper assembly; 2. Drive shaft; 3. Wheel rim; 4. Brake disc; 5. Air spring; 6. Electronic component layout area; a. Fixing screws; b. Connector; c. Locking mechanism; d. Electronic components; e. Transmission gear. DETAILED DESCRIPTION

[0031] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0032] like Figures 1 to 5As shown, the present invention provides a layout structure of a wheel-end brake controller, including a wheel rim 3, an electric-controlled brake caliper and a drive shaft 2, and a brake disc 4 is installed on the wheel rim 3. The electric-controlled brake caliper includes an electronic control unit 101, a motor gear unit 102 and a brake caliper assembly 103, and the electronic control unit 101 includes a PCBA 1012, which is arranged at the end of the brake caliper assembly 103 and is offset in a radial direction (the radial direction refers to a direction perpendicular to the axis of the wheel rim 3) away from the center of the wheel rim. The vertical distance between the middle part of PCBA1012 in the length direction and the axis of the wheel rim 3 is greater than the vertical distance between the caliper cylinder hole and the axis of the wheel rim 3, so the middle part of PCBA1012 is offset. PCBA1012 is a single-layer arrangement. The middle part of PCBA1012 is located between the two end parts in the length direction of PCBA1012. The length direction of PCBA1012 is perpendicular to the axis of the caliper cylinder hole. The caliper cylinder hole of the brake caliper assembly 103 is a circular hole. The axis of the caliper cylinder hole is parallel to the axis of the wheel rim 3. The caliper cylinder hole is used to accommodate the piston of the brake caliper assembly 103, and the PCBA1012 and the caliper cylinder hole are offset to be away from the axis of the wheel rim 3, so as to provide a wider rotation angle for the drive shaft 2.

[0033] Specifically, if Figures 1 to 6 As shown, the electronic control unit 101 includes a housing 1013 and a housing cover 1011, the housing 1013 and the housing cover 1011 are fixedly connected, the PCBA 1012 is located inside the housing 1013, the housing 1013 is arranged on the brake caliper assembly 103, the PCBA 1012 is located between the housing 1013 and the housing cover 1011, the PCBA 1012 is generally in an arc-shaped structure, and the middle portion of the PCBA 1012 is bent in a radial direction away from the center of the wheel rim 3. The shape of the housing cover 1011 matches the shape of the PCBA 1012, the distance between the middle portion of the housing cover 1011 and the axis of the wheel rim 3 is greater than the distance between the two end portions of the housing cover 1011 and the axis of the wheel rim 3, and the middle portion of the housing cover 1011 is located between the two end portions.

[0034] The PCBA 1012 is offset relative to the center of the brake caliper assembly 103 along the radial direction of the wheel rim 3 toward the outside of the center of the wheel rim 3 , and the PCBA 1012 is arranged in a single layer, and the PCBA 1012 is arranged perpendicular to the axial direction of the wheel rim 3 .

[0035] like Figure 1 and Figure 2As shown, after the electronic control unit 101 and the motor gear unit 102 are offset relative to the center of the brake caliper assembly 103 along the radial direction of the wheel rim 3 toward the outside of the center of the wheel rim 3, the electronic control unit 101, the motor gear unit 102, the brake caliper assembly 103 and the inner wall of the wheel rim 3 form an offset area. The area of ​​the PCBA 1012 away from the center of the rim is larger than the area of ​​the motor gear unit 102 away from the center of the rim.

[0036] like Figures 1 to 4 As shown, electronic component d is arranged on PCBA1012 and is located in the offset area, and electronic component d is located in the non-overlapping portion between PCBA1012 and the gear transmission mechanism. Electronic component d is an electronic component with a height greater than 7 mm, and the height direction of electronic component d is parallel to the axial direction of the wheel rim 3.

[0037] The electric control brake caliper also includes components such as fixing screws a, connectors b, locking mechanisms c, transmission gears e and signal sensors, and the fixing screws a, connectors b, locking mechanisms c, transmission gears e and signal sensors are located in the offset area. The arrangement of various components of the electric control brake caliper in the offset area can make full use of the rim space without additionally increasing the axial height of the brake caliper, thereby preventing the axial height of the brake caliper from being too high and interfering with components in the rim (such as the air spring 5).

[0038] The locking mechanism c comprises an electromagnet, which cooperates with the transmission gear e. The locking mechanism c is used to lock the transmission gear e to prevent the transmission gear e from rotating. The electromagnet is connected to the circuit board through a busbar.

[0039] The locking mechanism c further includes an electrical connector, and the electrical connector is connected to the PCBA 1012 along the outer side of the motor gear unit 102 .

[0040] like Figure 1 As shown, the offset setting of PCBA1012 results in the emergence of a first offset space, the offset of the transmission gear e covers a portion of the first offset space formed by the circuit board, and at the same time generates a second offset space, the locking mechanism c is arranged in the second offset space formed by the transmission gear e, and the conductive component of the electromagnet (i.e., the busbar) is arranged in the first offset space formed by the circuit board.

[0041] like Figures 1 to 4As shown, preferably, the side wall of the housing 1013 facing the center of the wheel rim 3 is in a fan-shaped or arc-shaped structure, and the side wall of the housing 1013 is coaxially arranged with the wheel rim 3, and the side wall of the housing cover 1011 facing the center of the wheel rim 3 is in a fan-shaped or arc-shaped structure, and the side wall of the housing cover 1011 is coaxially arranged with the wheel rim 3. Under the condition that the electronic control unit 101 meets the safety gap with the inner wall of the rim, the rim space is fully utilized, so that the electronically controlled brake caliper is easy to be arranged in the wheel rim 3, and the appearance is more beautiful.

[0042] Preferably, the electronic control unit 101 and the motor gear unit 102 are integrated and connected by fasteners. The brake caliper assembly 103 and the motor gear unit 102 are integrated and connected by fasteners. The motor gear unit 102 includes a motor and a gear transmission mechanism, the gear transmission mechanism is composed of a first gear, an intermediate transmission gear (i.e., transmission gear e) and a second gear, the gear transmission mechanism is arranged at the lower end of PCBA1012, and the intermediate transmission gear is offset away from the center of the rim in the radial direction (the radial direction refers to the direction perpendicular to the axis of the wheel rim 3), the intermediate transmission gear is a double gear composed of a large gear and a small gear, the large gear of the intermediate transmission gear is meshed with the first gear, the small gear is meshed with the second gear, and the motor drives the first gear to rotate.

[0043] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A wheel end brake controller arrangement structure, comprising a wheel rim, an electric control brake caliper and a drive shaft, wherein the electric control brake caliper comprises an electronic control unit, a motor gear unit and a brake caliper assembly, characterized in that: The electronic control unit includes at least one circuit board, which is arranged at the end of the brake caliper assembly and is radially offset away from the center of the wheel rim. The distance between the middle part of the circuit board and the axis of the wheel rim is greater than the distance between the caliper cylinder hole and the axis of the wheel rim.

2. The arrangement structure of the wheel end brake controller according to claim 1 is characterized in that: The circuit board is arranged perpendicular to the axial direction of the wheel rim.

3. The arrangement structure of the wheel end brake controller according to claim 1 is characterized in that: The circuit board is arranged in a single layer.

4. The arrangement structure of the wheel end brake controller according to claim 1 is characterized in that: Electronic components are arranged on the circuit board, and the electronic components are electronic components with a height greater than 7 mm.

5. The arrangement structure of the wheel end brake controller according to claim 4 is characterized in that: The electronic components are located at the non-overlapping portion of the circuit board and the gear transmission mechanism at the upper end.

6. The arrangement structure of the wheel end brake controller according to claim 5, characterized in that: The gear transmission mechanism is arranged at the lower end of the circuit board, and the intermediate transmission gear is arranged offset in a radial direction away from the center of the rim.

7. The arrangement structure of the wheel end brake controller according to claim 6, characterized in that: The electronically controlled brake caliper further comprises a locking mechanism, which is axially arranged at a lower end of an intermediate transmission gear of the gear transmission mechanism.

8. The arrangement structure of the wheel end brake controller according to any one of claims 1 to 7, characterized in that: The area of ​​the circuit board in the direction away from the center of the rim is larger than the area of ​​the motor gear unit in the direction away from the center of the rim.

9. The arrangement structure of the wheel end brake controller according to claim 7, characterized in that: The locking mechanism includes an electrical connector, and the electrical connector is connected to the circuit board along the outer side of the motor gear unit.

10. The arrangement structure of the wheel end brake controller according to claim 7, characterized in that: The middle portion of the circuit board is bent in a radial direction away from the center of the wheel rim.

11. The arrangement structure of the wheel end brake controller according to any one of claims 1 to 7, characterized in that: The electronic control unit further includes a housing and a housing cover, which are located on the upper and lower sides of the circuit board.

12. The arrangement structure of the wheel end brake controller according to any one of claims 1 to 3, characterized in that: The electronic control unit is connected to the motor gear unit via a fastener, and the brake caliper assembly is connected to the motor gear unit via a fastener.

13. A brake device, characterized in that: The invention comprises an arrangement structure of a wheel end brake controller as described in any one of claims 1 to 12.

14. Wheel assembly, characterized in that: Includes the braking device as claimed in claim 13.

15. A vehicle, characterized in that: Includes the wheel assembly as described in claim 14.

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