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CN-117489729-B - Electronic mechanical brake for adjusting gap based on unidirectional self-locking mechanism

CN117489729BCN 117489729 BCN117489729 BCN 117489729BCN-117489729-B

Abstract

The electronic mechanical brake for adjusting the gap based on the unidirectional self-locking mechanism comprises a driving motor speed reducing mechanism, a cam shaft, a clamping bearing, a gap adjusting bearing, a supporting bearing, a gap adjusting bracket, a supporting block, a pressure spring, a unidirectional self-locking mechanism and a caliper seat of a wheel braking mechanism, wherein the driving motor speed reducing mechanism, the cam shaft, the clamping bearing, the gap adjusting bearing, the supporting bearing, the gap adjusting bracket, the supporting block and the pressure spring are arranged on the caliper seat of the wheel braking mechanism, and three sets of self-locking mechanisms are respectively arranged between the rear ends in three sliding grooves and the rear ends of the adjusting bracket and the supporting block. Under the combined action of the related mechanisms, after the clearance between the brake disc and the brake disc is increased due to abrasion of the brake disc, the brake disc can be automatically adjusted to a proper position in a unidirectional forward direction, the effect of accurately and automatically adjusting the clearance between the brake disc and the brake disc in a full-mechanical mode is achieved, the excellent braking function of a vehicle is ensured, and the maintenance cost of the vehicle is reduced. In conclusion, the invention has good application prospect.

Inventors

  • Yan Zhoudong
  • YAN MIN
  • CHEN XINBO

Assignees

  • 上海线维传动科技有限公司

Dates

Publication Date
20260512
Application Date
20230614

Claims (7)

  1. 1. The electronic mechanical brake for adjusting the gap based on the unidirectional self-locking mechanism comprises a driving motor speed reducing mechanism, a cam shaft, a clamping bearing, a gap adjusting bearing, a supporting bearing, a gap adjusting bracket, a supporting block, a pressure spring, a unidirectional self-locking mechanism and a caliper seat of a wheel braking mechanism, and is characterized in that the middle part of the cam shaft is provided with at least three cams, the inner rings of at least two adjusting bearings are respectively tightly sleeved at the outer side ends of the left cam and the right cam of the cam shaft, the inner rings of at least two supporting bearings are respectively tightly sleeved at the left outer side end and the right outer side end of the cam shaft, and the inner rings of the clamping bearings are tightly sleeved at the outer side ends of the middle cam of the cam shaft; the caliper seat is characterized in that at least three sliding grooves are formed in one side of the rear end of the caliper seat, a support frame is respectively arranged at the front ends of the sliding grooves at the left end and the right end, one guide groove is respectively arranged from the front parts to the rear parts of the inner sides and the outer sides of the support frame, two support bearings are respectively arranged at the front ends of the inner sides of the two support frames in a sliding manner, three cams, clamping bearings and adjusting bearings are respectively arranged between the outer sides of the inner ends of the two support frames, at least two support blocks are respectively sleeved in the middle parts of the two support frames in a sliding manner, the front parts of the support blocks are arranged at the rear ends of the two support bearings, mounting grooves are respectively arranged in the middle parts of the two support blocks, pressure springs are respectively sleeved in the front ends of the mounting grooves of the two support blocks in a sliding manner, pressure rods in the middle parts of the left side and the right side of a gap adjusting support frame are respectively arranged in the support frames through the guide grooves of the inner sides of the two support frames, the two pressure rods are respectively arranged at the rear ends of the two pressure springs, the support blocks in the outer sides of the support blocks in a mounting manner, a support plate is arranged on the outer sides of the support blocks in the support of one support frame, a driving motor speed reducing mechanism is arranged on the support plate, the power output shaft of the driving motor speed reducing mechanism is fixedly arranged with one outer side end of the cam shaft, the self-locking mechanisms are at least three sets, and the three sets of self-locking mechanisms are respectively arranged between the rear ends of the three sliding grooves and the rear ends of the adjusting bracket and the supporting block.
  2. 2. The electromechanical brake for a one-way self-locking mechanism for gap adjustment according to claim 1, wherein the left and right ends have a uniform outer shape and smaller than the outer diameter of the intermediate cam, and a gap is provided between the outer sides of the two gap-adjusting bearings and the outer ends of the inner sides of the two supporting frames.
  3. 3. The electromechanical brake for gap adjustment based on unidirectional self-locking mechanism as claimed in claim 1, wherein the outer diameter of the compression spring and the support block is smaller than the inner diameter of the support frame, the left-right distance between the support bearings is smaller than the left-right width of the support frame, and the outer diameter of the compression bar of the gap adjustment support is smaller than the width of the guide groove at the inner side end of the support frame.
  4. 4. The electromechanical brake for gap adjustment based on a one-way self-locking mechanism according to claim 1, wherein the gap adjustment bracket has a push rod at a front end thereof, front ends of the push rods and rear portions of outer rings of the two adjustment bearings are fixedly installed together, and a gap portion between inner sides of the push rods, a front side of the adjustment bracket, and a rear outer side end of the clamping bearing are spaced apart.
  5. 5. The electromechanical brake for a vehicle according to claim 1, wherein the friction plate of the brake mechanism of the vehicle is mounted on the front inner side end of the caliper base, and the rear side of the brake plate of the brake mechanism is closely and movably fitted with the front side end of the clamping bearing outer race of the camshaft.
  6. 6. The electromechanical brake for gap adjustment based on unidirectional self-locking mechanism as claimed in claim 1, wherein each set of locking mechanism comprises a cover plate, elastic gaskets, an inner wedge, an outer wedge and a fixing screw, wherein the movable block at the rear end of the gap adjustment bracket and the rear ends of the two support blocks are respectively and slidably positioned in three sliding grooves of the caliper base, screw holes are respectively arranged at the rear ends of the movable block and the support block, the fixing screw is led out forwards from an opening of the cover plate, a limiting groove is respectively arranged in the middle of the rear ends of the two outer wedges, the two elastic gaskets are respectively positioned in the two limiting grooves, the front ends of the left and right parts of the cover plate are respectively contacted with the rear ends of the two elastic gaskets, and the inner wedge is slidably positioned between the two outer wedges.
  7. 7. The electromechanical brake for gap adjustment based on unidirectional self-locking mechanism as claimed in claim 1, wherein in each set of locking mechanism, the inclined planes on the inner sides of the two outer wedges are identical to the inclined planes on the outer sides of the inner wedges, wherein the front ends of the fixing screws of the two sets of locking mechanisms are fixedly connected with the rear ends of the two supporting blocks, and the front ends of the fixing screws of the other sets of locking mechanisms are fixedly connected with the rear ends of the movable blocks.

Description

Electronic mechanical brake for adjusting gap based on unidirectional self-locking mechanism Technical Field The invention relates to the technical field of brake equipment, in particular to an electromechanical brake for adjusting a gap based on a unidirectional self-locking mechanism. Background Braking the wheels in the rotation of the vehicle is an important function which must be possessed by the vehicle when the vehicle is in use, and the quality of braking performance not only affects the braking comfort, but also plays a decisive role in the safety of the vehicle. From the aspects of driving and transmission, the braking equipment mainly comprises two main types of mechanical hydraulic type and electromechanical type, the former is still applied on a large scale at present due to the mature technology, but the braking equipment has certain defects in practical application due to the defects of easy leakage of a hydraulic circuit, slow braking response and the like. With the progress of electric automobile technology, electromechanical brake technology has been widely developed. The electromechanical brake has the advantages of no need of hydraulic oil, high response speed, more accurate braking force control and the like, and particularly, the electromechanical brake has more application of one type of brake for electric automobiles. The driving executing mechanism of the electromechanical brake mainly comprises a screw rod, a wedge block, a connecting rod, a cam and the like, and during actual operation, the power output by the driving motor speed reducing mechanism drives the brake pad and the brake disc of the vehicle to generate relative sliding friction through the screw rod, the wedge block, the connecting rod, the cam and the like, so that the brake disc stops rotating, and the vehicle stops moving. The brake disc is forced to brake by friction, the thickness of the brake disc becomes thinner gradually, and when the gap between the brake disc and the brake disc exceeds a threshold value, the braking effect is deteriorated. For the above reasons, in order to maintain the normal braking function of the vehicle, the clearance of the brake pads needs to be adjusted. For cam type electromechanical brakes, the adjusting mode is generally that a worker manually moves the driving motor reducing mechanism to a certain position towards the front end, so that the protruding surface of the cam can push out the brake pad forwards as much as possible when the brake and the driving motor reducing mechanism drive the cam to rotate, and further the gap between the brake pad and the brake disc is reduced, and the purpose of good braking effect is achieved. The manual adjustment brings inconvenience to staff and correspondingly increases the maintenance cost of the vehicle owner. Although the prior art also has the effects of detecting the gap between the brake pad and the brake disc through the electronic element and then automatically controlling the speed reducing mechanism of the driving motor to displace a certain position to perform compensation adjustment of the brake gap (hereinafter referred to as electric control), the mode cannot effectively meet the actual requirements due to the fact that the electric power is required to be supplied, the electronic device is greatly influenced by environmental factors, the performance of the electronic device is aged, and the like, and the adjustment reliability cannot be ensured. In summary, it is particularly necessary to provide a mechanical brake for a vehicle that does not require manual adjustment, can have both manual adjustment reliability and electric control adjustment convenience, and can automatically adjust the gap between an automatic disc and a brake pad. Disclosure of Invention In order to overcome the defects that the gap between a brake pad (brake pad) and a brake disc is manually adjusted in the prior art, inconvenience is brought to workers, the maintenance cost of a vehicle owner is increased, and the gap between the brake pad and the brake disc is electrically controlled, the adjustment reliability cannot be guaranteed due to the influence of the operational reliability factors of electronic devices and the like. The technical scheme adopted for solving the technical problems is as follows: The electronic mechanical brake for adjusting the gap based on the unidirectional self-locking mechanism comprises a driving motor speed reducing mechanism, a cam shaft, a clamping bearing, an adjusting bearing, a supporting bearing, a gap adjusting bracket, a supporting block, a pressure spring, a unidirectional self-locking mechanism and a caliper seat of a wheel braking mechanism, and is characterized in that the middle of the cam shaft is provided with at least three cams, inner rings of at least two adjusting bearings are respectively contacted with outer side ends of two cams at the left end and the right end of the cam shaft in a tangential manner,