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Spreader unit for a drum brake, comprising wear travel adjustment, and drum brake

一种鼓式制动器、驱动单元的技术，应用在机械驱动鼓式制动器、制动器的部件、松弛调节器等方向，能够解决降低制动器刚度和响应速度、限制等问题，达到补偿不均匀的贴靠、高功能可靠性、降低故障敏感性的效果

Active Publication Date: 2020-05-26
CONTINENTAL AUTOMOTIVE TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such cable drives reduce the stiffness and response speed of the brake, and since the tensile strength of the cable limits the maximum achievable braking force, their use as a service brake is at least limited, or even impossible. brake

Method used

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  • Spreader unit for a drum brake, comprising wear travel adjustment, and drum brake
  • Spreader unit for a drum brake, comprising wear travel adjustment, and drum brake
  • Spreader unit for a drum brake, comprising wear travel adjustment, and drum brake

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Experimental program
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Embodiment approach

[0037] In order to bring the brake pads 5 , 5 ′ into contact evenly against the inner wall 7 , the two actuating pistons 17 , 18 are arranged axially floating and by means of the axial guide 11 in a rotationally fixed manner relative to the drive sleeve 9 In the drive sleeve 9. In the exemplary embodiment shown, the axial guide is formed by means of an axial toothing geometry, in particular an axial spline. Other embodiments such as lugs engaging in axial grooves etc. are also permissible within the invention.

[0038] The adjusting device 26 mainly comprises an adjusting piston 19 in force flow with the first actuating piston 17, and a locking sleeve 27 engaged with the adjusting piston 19 so that it cannot rotate relative to the second opening piston 28 but can It is arranged in an axially limited displacement manner and is elastically preloaded against the adjusting piston towards the adjusting piston.

[0039] The separate adjusting piston 19 is screwed into the first ac...

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PUM

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Abstract

The invention relates to an improved electromechanically drivable spreader unit (2) having an integrated adjustment apparatus (26) for a drum brake (1), the linear motion of brake shoe holders (31, 31') being produced by two ball-ramp devices (3, 3'), wherein a first ball-ramp device (3) comprises a first actuation piston (17) arranged for rotation about the axis (A) and a second ball-ramp device(3') comprises a second actuation piston (18) arranged for rotation about the axis (A), and an adjustment apparatus (26) for compensating an actuation travel that increases as a result of wear on thefriction linings (5, 5') is provided axially centrally within the housing (14) and substantially between the actuation pistons (17, 18).

Description

technical field [0001] The invention relates to an electromechanically drivable spreading (expanding) unit for a drum brake with wear travel (path) adjustment, and to a related drum brake. Background technique [0002] As automation increases in modern vehicles, more and more systems are driven electromechanically. It is therefore clearly desirable to use particularly simple and robust drum brakes as electromechanically actuated service brakes. In the operation of the known and widely used drum brakes, at least one expansion unit expands the two pivotally supported brake shoes relative to each other and presses against the radial direction of the pot-shaped brake drum. on the inner wall. It is also known to use robust, low-maintenance and low-friction ball ramp arrangements as rotation-translation converters, so-called ball-in-ramps. [0003] For drum brakes to operate safely, reliable travel compensation for wear is required. However, known conventional adjustment devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D51/22F16D65/22F16D65/56F16D121/24F16D125/36
CPCF16D51/22F16D65/22F16D65/562F16D2121/24F16D2125/36F16D65/54F16D65/56
Inventor U·巴赫M·格德克H·冯海因A·塞弗J·霍夫曼A·梅斯纳W·里特尔
Owner CONTINENTAL AUTOMOTIVE TECH GMBH
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