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Mechanically unlocked hydraulic braking mechanism and mechanical unlocking method thereof

A hydraulic brake and mechanical technology, applied in the direction of brake actuators, etc., can solve the problems of control system failure, hydraulic pipeline leakage, etc., to achieve the effect of compact structure, convenient vehicle repair and maintenance, saving labor and time cost

Pending Publication Date: 2018-10-12
YINCHUAN WEILI REDUCER MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydraulic brake mechanism that can be mechanically unlocked and its mechanical unlocking method, which solves the problem that the brake mechanism will lock the wheels when the control system fails, the hydraulic pipeline leaks, or the vehicle cannot provide power. Easier vehicle repair and maintenance

Method used

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  • Mechanically unlocked hydraulic braking mechanism and mechanical unlocking method thereof
  • Mechanically unlocked hydraulic braking mechanism and mechanical unlocking method thereof
  • Mechanically unlocked hydraulic braking mechanism and mechanical unlocking method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, parking with oil brake

[0030] When the power supply is cut off, the left hydraulic cylinder 13 and the right hydraulic cylinder 14 release pressure, the hydraulic pressure received by the piston 10 is less than the elastic force of the spring 11, and the spring 11 pushes the piston 10 to press the steel plate 7 and the friction plate 8, and then the high-speed gear Circle 9 is locked, and realizes parking brake, and the parking brake torque is all provided by spring 11 elastic forces.

Embodiment 2

[0031] Embodiment 2, driving release brake

[0032] During normal driving, the left hydraulic cylinder 13 releases pressure and the right hydraulic cylinder 14 pressurizes. When the hydraulic pressure received by the piston 10 is greater than the elastic force of the spring 11, the spring 11 is compressed, the piston 10 is separated from the steel sheet 7, and the steel sheet 7 and the steel sheet 7 are separated. A gap is formed between the friction plates 8 and an oil film is formed, and the friction plates 8 can rotate at a high speed with the high-speed ring gear 9 .

Embodiment 3

[0033] Embodiment 3, braking when driving

[0034] When braking, the left hydraulic cylinder 13 releases pressure, and the right hydraulic cylinder 14 gradually decompresses. When the hydraulic pressure received by the piston 10 is less than the elastic force of the spring 11, the piston 10 starts to press the steel plate 7 and the friction plate 8. stage ring gear 9 for braking; if the braking torque provided by the spring 11 is insufficient, the left hydraulic cylinder 13 will be pressurized, the right hydraulic cylinder 14 will release pressure, and the piston 10 will be further compressed under the action of the hydraulic pressure and the elastic force of the spring 11 Steel plate 7 and friction plate 8, the braking torque at this moment is provided jointly by the hydraulic pressure and the elastic force of spring 11.

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PUM

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Abstract

The invention discloses a mechanically unlocked hydraulic braking mechanism and a mechanical unlocking method thereof. The mechanism comprises a housing, a high-speed level gear ring, a low-speed level gear ring, a friction piece, a steel piece, a spring, a piston and an unlocking bolt. The method comprises the steps that when a vehicle is faulted and at a parking state, the unlocking bolt is screwed tightly, the piston is separated from the steel sheet, a clearance is generated between the steel piece and the friction piece, the friction piece is rotated along with the high-speed level gear ring, and the release of a parking braking state can be achieved.

Description

technical field [0001] The invention belongs to the field of hydraulic brakes, and in particular relates to a mechanically unlockable hydraulic brake mechanism and a mechanical unlocking method thereof. Background technique [0002] At present, the hydraulic brake mechanism has the advantages of high working pressure, good sensitivity, compact structure, high mechanical efficiency, etc., and has been widely used in construction machinery, automobiles, slewing drives and other fields. With the continuous development of new energy electric vehicles, the hub drive technology has gradually matured. Due to the limitation of space and weight, the braking mechanism mostly adopts wet multi-disc hydraulic braking mechanism. For safety and performance considerations, the braking strategy adopts Cut off the oil brake. At present, most oil-cut brake mechanisms do not have a mechanical unlocking device. Once the control system fails, the hydraulic pipeline leaks, or the vehicle cannot p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D65/14
CPCF16D65/14
Inventor 李想张亮刘喜龙马玺马文广
Owner YINCHUAN WEILI REDUCER MACHINERY