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CN-122014771-A - Brake caliper assembly, brake system, and sensor

CN122014771ACN 122014771 ACN122014771 ACN 122014771ACN-122014771-A

Abstract

The application relates to a brake caliper assembly, a brake system and a sensor. The brake caliper assembly comprises a brake caliper, a strain gauge sensor and a connecting structure, wherein at least one part of the brake caliper is provided with a mounting part, the mounting part provides a mounting position, the strain gauge sensor comprises a strain gauge and an elastic body, the elastic body comprises a diaphragm, a first mounting part and a second mounting part, the first mounting part and the second mounting part are respectively connected with two ends of the diaphragm in a first direction, the strain gauge is arranged on the diaphragm, deformation of the diaphragm in the first direction and deformation sensing stress in a second direction can be achieved through the strain gauge, the brake caliper is fixedly connected with the strain gauge sensor through the connecting structure, and the first mounting part and the second mounting part are respectively in pressing connection with the mounting position in a third direction in a propping mode, so that the connecting structure is formed.

Inventors

  • DAI LIN

Assignees

  • 上海海拉电子有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (10)

  1. 1. A brake caliper assembly (10), characterized by comprising: a brake caliper (1) having a mounting portion (11) at least one place of the brake caliper (1), the mounting portion (11) providing a mounting location (110); The strain gauge type sensor (2) comprises a strain gauge (21) and an elastic body (22), wherein the elastic body (22) comprises a diaphragm (223), and a first mounting part (221) and a second mounting part (222) which are respectively connected with two ends of the diaphragm (223) in a first direction, the strain gauge (21) is arranged on the diaphragm (223), and the strain gauge (21) can sense stress through deformation of the diaphragm (223) in the first direction and/or deformation in a second direction, wherein the first direction is perpendicular to the second direction, and a plane formed by the first direction perpendicular to the second direction is perpendicular to or parallel to a plane of the diaphragm (223); The brake caliper (1) is fixedly connected with the strain gauge type sensor (2) through a connecting structure (30), and the first mounting part (221) and the second mounting part (222) are respectively in pressing connection with the mounting position (110) in a third direction in a propping mode to form the connecting structure (30), wherein the third direction is perpendicular to the first direction and the second direction.
  2. 2. Brake caliper assembly (10) according to claim 1, characterized in that the first mounting portion (221) comprises a first mounting portion body (2211) and a first mounting hole (2212) open in the first mounting portion body (2211), the second mounting portion (222) comprises a second mounting portion body (2221) and a second mounting hole (2222) open in the second mounting portion body (2221), the mounting location (110) comprises a first connection hole (1101), a second connection hole (1102), the first mounting hole (2212), the first connection hole (1101) are connected in a third direction by means of a first connection piece (31), and the second mounting hole (2222), the second connection hole (1102) are connected in a third direction by means of a second connection piece (32) to constitute the connection structure (30).
  3. 3. Brake caliper assembly (10) according to claim 1, wherein said strain gauge sensor (2) further comprises a housing (23), said housing (23) defining a receiving space (230), said diaphragm (223) being located inside said receiving space (230).
  4. 4. A brake caliper assembly (10) according to claim 3, wherein the housing (23) includes a base (231) and a cover (232), the cover (232) being capable of closing with the base (231), the base (231) having a first positioning portion (2311), the diaphragm (223) having a second positioning portion (2231), one of the first and second positioning portions (2311, 2231) being a positioning hole and the other being a positioning post, the diaphragm (223) being positioned by the base (231) by cooperation of the positioning hole with the positioning post.
  5. 5. Brake calliper assembly (10) according to claim 4, wherein the strain gauge sensor (2) further comprises a circuit board (24), the circuit board (24) having a first face (241), a second face (242) opposite in a third direction, the first face (241) being connected against a connection face (2313) of the seat (231) such that a terminal (2314) provided by the connection face (2313) is electrically connected with the circuit board (24), the second face (242) being provided in the third direction towards the diaphragm (223), the strain gauge (21) being electrically connected with the circuit board (24) by means of a wire (25), the circuit board (24) having a window (243), the window (243) corresponding to the strain gauge (21) such that the strain gauge (21) is visible from the view of the circuit board (24) towards the diaphragm (223).
  6. 6. Brake calliper assembly (10) according to claim 1, wherein the width (W) of the membrane (223) in the second direction is smaller than the maximum width (D) of the first mounting portion (221), the second mounting portion (222) in the second direction.
  7. 7. Brake calliper assembly (10) according to claim 6, wherein the thickness (H) of the first mounting portion (221), the second mounting portion (222) in the third direction is 2.5mm to 4mm, the thickness (T) of the membrane (223) in the third direction is 0.6mm to 1.0mm, the length (L) of the membrane (223) in the first direction is 12mm to 15mm, and the width of the membrane (223) in the second direction (W) is 6mm to 7mm.
  8. 8. A brake system (1000), comprising: Brake caliper assembly (10) according to any one of claims 1-7, said brake system being configured to: and the control unit (200) obtains the braking force and/or the braking torque of the brake caliper (1) according to the strain sensed by the position of the strain gauge (22).
  9. 9. The brake system (1000) of claim 8, wherein the brake system is an electromechanical brake system (Electronic MechanicalBrake, EMB).
  10. 10. A strain gauge sensor (2), comprising: Strain gage (21) The elastic body (22), the elastic body (22) comprises a diaphragm (223), and a first mounting part (221) and a second mounting part (222) which are respectively connected with two ends of the diaphragm (223) in a first direction, wherein the diaphragm (223) is provided with the strain gauge (21), the strain gauge (21) can sense stress through deformation of the diaphragm (223) in the first direction and deformation in a second direction, the first direction is perpendicular to the second direction, and a plane formed by the first direction perpendicular to the second direction is perpendicular to or parallel to the plane of the diaphragm (223); The strain gauge type sensor (2) can be fixedly connected with a measuring object through a connecting structure (30), and the first mounting part (221) and the second mounting part (222) are respectively in pressing connection with the mounting position (110) of the measuring object in a third direction, so that the connecting structure (30) is formed, wherein the third direction is perpendicular to the first direction and the second direction.

Description

Brake caliper assembly, brake system, and sensor Technical Field The application relates to a brake caliper assembly, a brake system and a sensor. Background For force measurement, for example, of the braking force of a brake system of a motor vehicle, for brake-by-wire, an electrohydraulic brake (Electronic Hydraulic Brake, EHB) is used, the measurement signal of which is the pressure signal of the hydraulic oil. However, for more advanced electro-mechanical brake systems (Electronic Mechanical Brake, EMB) brake-by-wire, the braking force cannot be measured with the pressure signal of the hydraulic oil, since there is no hydraulic circuit. In a comparison scheme, a direct measurement technical route is adopted, a force sensor is arranged in front of a ball screw and a caliper to detect force, and because the braking force is large, high requirements are put on the materials and the process of the sensor, the rapid application and popularization of the force sensor are restricted, and the compactness of the whole structure is also influenced. In a comparison scheme, a technical route of indirect measurement is adopted, the deformation of the caliper is directly measured by directly attaching a strain gauge to the caliper, and firstly, the material of the caliper is not suitable for being used as an elastomer of a sensor, but is high in material cost suitable for being used as the elastomer, and is not suitable for being used as the material of the caliper. And the thermal temperature coefficient of the caliper material is larger, and if the strain gauge is directly arranged on the surface of the caliper, larger temperature drift can be generated, so that the measurement accuracy is influenced. In addition, the production equipment for attaching the strain gauge with small precision volume and the sensor to the caliper has high investment, and particularly, the precision component is required to be integrated to the caliper with larger volume, a large-scale production line is required to be customized to meet the space requirement, in addition, the arrangement of the strain gauge relates to the technological processes of sand blasting, glass silk screen printing, glass sintering and the like on the surface of the caliper, and the whole caliper is subjected to the technological process, so that obviously, the cost is increased and the production efficiency is reduced. In another comparison scheme, a scheme of arranging an optical fiber/grating strain sensor on a caliper is adopted, and the structure is complex and the cost is high. Accordingly, there is a need in the art for a brake caliper assembly, a brake system, a force measurement system, a sensor to overcome at least one of the above problems. Disclosure of Invention The brake caliper assembly comprises a brake caliper, a strain gauge sensor, a strain gauge type sensor and a connecting structure, wherein the brake caliper is provided with a mounting part at least one position of the brake caliper, the mounting part is used for providing a mounting position, the strain gauge type sensor comprises a strain gauge and an elastic body, the elastic body comprises a diaphragm, a first mounting part and a second mounting part, the first mounting part and the second mounting part are respectively connected with two ends of the diaphragm in a first direction, the strain gauge is arranged on the diaphragm, the strain gauge can sense stress through deformation of the diaphragm in the first direction and deformation of the diaphragm in a second direction, the first direction is perpendicular to the second direction, a plane formed by the first direction perpendicular to the second direction is perpendicular to or parallel to the plane of the diaphragm, the brake caliper is fixedly connected with the strain gauge type sensor through the connecting structure, and the first mounting part and the second mounting part are respectively connected with the mounting position in a pressing mode in a third direction in a propped mode, and the connecting structure is formed. By adopting the brake caliper assembly, the beneficial effects include, but are not limited to, on the basis of realizing indirect measurement, the accuracy of measurement is ensured, the manufacturing cost can be reduced, and the yield is improved. Specifically, through brake caliper with foil gauge formula sensor passes through connection structure fixed connection, through first installation department, second installation department respectively with the compressing tightly of mounted position in the looks offal constitutes connection structure for brake caliper's deformation is transmitted better for the foil gauge, and has avoided the high temperature that the welding process produced to the negative effect that elastomer and foil gauge brought like comparing other connected modes such as welding, has guaranteed indirect measurement's accuracy. In addition, compared with the scheme that the strain gau