Actuator driven by gear having axial guide rail, and drum brake and braking device provided with same

A drum brake and braking device technology, applied in the field of drum brakes and actuators, can solve problems such as difficult adjustment and uneven wear, and achieve the effects of reducing tooth wear, precise positioning, and reducing production and maintenance costs.

Inactive Publication Date: 2016-11-23
CHASSIS BRAKES INT BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of actuator is significantly more efficient for a given actuation force, but has other disadvantages, in particular it is more difficult to adjust and wears unevenly

Method used

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  • Actuator driven by gear having axial guide rail, and drum brake and braking device provided with same
  • Actuator driven by gear having axial guide rail, and drum brake and braking device provided with same
  • Actuator driven by gear having axial guide rail, and drum brake and braking device provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] In the embodiment presented here, the drum brake 1 comprises a linear actuator 2 and a second actuator 11 according to the invention, each actuator allowing different modes of operation. The two actuation modes are controlled to provide two different braking functions.

[0047] In this embodiment, a linear actuator 2 according to the invention is used to provide the parking or emergency braking function, and a second actuator 11 (for example a hydraulic wheel of known type with two opposed pistons) Cylinder) is used to provide the service braking function.

[0048] The drum brake 1 generates a braking torque between the drum 15 and the base plate 10 , wherein the drum 15 and the base plate 10 move in rotation relative to each other about the axis of rotation A1 . Typically, the floor 10 is rotatably fixed to the chassis of the vehicle, usually via a suspension shaft or half shaft. The drum is coupled to the wheel, fixed in translation and guided in rotation about the ...

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PUM

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Abstract

The invention relates to an actuator for brake shoes inside a drum brake of a motor vehicle, in particular with an electric motor. The invention also relates to a brake provided with such an actuator, for example a drum-in-hat composite brake or a dual-mode brake combining a service brake in simplex mode and a parking brake in duo-servo mode. The actuator includes a linear actuator assembly including a screw-and-nut system and is capable of separating the ends of the brake shoes. Said screw-and-nut system is driven by a transmission sub-assembly which in turn is driven by an electric motor. Said transmission sub-assembly rotates an element for actuating the linear actuation assembly by using a guide rail connection. In particular, said actuator element is translatably movable in a single direction and rotatably fixed to a gear of the transmission sub-assembly.

Description

[0001] The invention relates to an actuator for a pad of a drum brake of a motor vehicle. The invention also relates to a brake and a braking device equipped with such an actuator. Background technique [0002] Drum brakes are commonly used in motor vehicles to achieve three types of braking: [0003] - service braking, including slowing and / or immobilizing the vehicle, usually via the brake pedal; [0004] - the parking brake, which makes it possible to immobilize a stationary vehicle by means of the handbrake; [0005] - Emergency braking, which involves slowing and / or immobilizing the vehicle in the event of failure of the service brakes, and which is usually provided by the same device as the parking brake. [0006] In most vehicles equipped with drum brakes, it is known to achieve all three types of braking by means of the same drum brakes. Specifically and generally, the parking brake function is provided by a cable connecting the handbrake control located in the pass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D51/22F16D51/24
CPCF16D51/22F16D51/24F16D2121/04F16D2121/24F16D2125/40B60T13/02B60T13/588B60T13/741F16D51/50F16D51/62F16D51/66F16D51/68F16D65/09F16D65/46F16D2065/386F16D2123/00F16D2250/0084
Inventor 塞德里克·吉尼翁热拉尔·卢克里斯多夫·杜巴斯蒂埃里·帕斯凯特阿尔贝托·莫利纳罗
Owner CHASSIS BRAKES INT BV
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