Failure-protecting decoupling-type braking mechanism and control method

A technology for fail-safe and braking mechanism

Pending Publication Date: 2017-05-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This power assist system couples the pedal force to the brake master cyl

Method used

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  • Failure-protecting decoupling-type braking mechanism and control method
  • Failure-protecting decoupling-type braking mechanism and control method
  • Failure-protecting decoupling-type braking mechanism and control method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] Such as Figure 1 to 6 Shown. The invention discloses a fail-safe decoupling brake mechanism, which includes a hydraulic tank 9, a master cylinder 5, a hydraulic adjusting device 8 and a wheel cylinder 7; the two outlets of the hydraulic tank 9 are respectively connected with two pipes of the master cylinder 5. The oil supply holes 56, 57, the two drain holes 64, 65 of the master cylinder 5 are respectively connected to the wheel cylinder 7 through the hydraulic adjustment device 8; the fail-safe decoupling brake mechanism also includes a brake pedal 1, a brake Push rod 2, transmission mechanism 3 and external power source 4;

[0042] The external power source 4 is used to provide a rotational torque to the transmission mechanism 3, and the brake pedal 1 is movably connected to the brake push rod 2;

[0043] The transmission mechanism 3 includes a turbine 38 and a gear 39 coaxially installed therewith, a rack 36 and a decoupling sleeve 31 sleeved outside ...

Example Embodiment

[0060] Example 2

[0061] This embodiment has the same features as the first embodiment except for the following features.

[0062] The specific installation position of the return spring 22 is sleeved on the brake push rod 2, one end of which is connected with the baffle 23 arranged in the middle of the brake push rod 2, and the other end is against the right limiting plate of the brake push rod 2. The baffle 23 and the brake push rod 2 are not in contact or sliding contact; when the brake pedal 1 is reciprocally stepped on, the brake push rod 2 can drive the decoupling sleeve 31 to axially reciprocate.

Example Embodiment

[0063] Example 3

[0064] This embodiment has the same features as the first embodiment except for the following features.

[0065] The specific installation position of the return spring 22 is that one end abuts against the inner wall of the decoupling sleeve 31, and the other end extends out of the right end opening of the decoupling sleeve 31 and abuts against the master cylinder housing 51 of the master cylinder 5; when the brake is pedaled back and forth When pedal 1, the brake push rod 2 can drive the decoupling sleeve 31 to reciprocate axially.

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Abstract

The invention discloses a failure-protecting decoupling-type braking mechanism and a control method. The mechanism includes a hydraulic tank, a main cylinder, a hydraulic adjusting device, a wheel cylinder, a braking pedal, a braking pushrod, a transmission mechanism and an external power source; the external power source is used for providing rotating torque for the transmission mechanism; the transmission mechanism includes a turbine, a gear arranged at the same shaft with the turbine, a rack, and a decoupling sleeve arranged at the exterior of the rack in a sleeved mode; upper teeth of the rack mesh with the gear; a rack displacement sensor is installed on the left end of the rack, and is used for measuring the distance between the rack and the inner wall of the decoupling sleeve, so that the braking pushrod does not make contact with the transmission mechanism when the external power source runs normally, and therefore braking decoupling is achieved; on the basis of the achievement of motion decoupling of the braking pedal and the braking main cylinder, the mechanism is provided with an emergency failure-protecting mechanism, has good control flexibility, and at the same time, effectively ensures the safety and reliability of vehicle braking.

Description

technical field [0001] The invention relates to an automobile decoupling braking device, in particular to a failure protection decoupling braking mechanism and a control method. Background technique [0002] Traditional vacuum assisted braking and electric assisted braking systems use the pedal force and the boost of the power source as input forces to jointly push the brake master cylinder, and have not achieved decoupling of the brakes. This power assist system couples the pedal force to the brake master cylinder, which greatly increases the complexity of the mechanical structure. And this kind of system has a stricter control strategy for power assist. When the driver steps on the brake pedal by mistake, the pedal force will also be transmitted to the master cylinder, resulting in an obvious braking effect, but the driver has no intention of braking at this time. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings an...

Claims

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Application Information

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IPC IPC(8): B60T7/06B60T13/14
CPCB60T13/143B60T7/06
Inventor 赵克刚吴健周斯加蔡清理皮志刚
Owner SOUTH CHINA UNIV OF TECH
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