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Components for protection against dirt in working cylinders

A component and operating rod technology, which is applied to vehicle parts, brakes, mechanical equipment, etc., can solve the problems of piston rod loosening, ineffective prevention of dirt particles and moisture entering the interior of the cylinder housing, etc.

Inactive Publication Date: 2016-10-12
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it is problematic in the known operating pedals that the piston rod can loosen from its fastening in the interior of the cylinder housing during transport due to vibrations or vibrations.
Another disadvantage is that the stop rings known from the prior art do not effectively prevent the penetration of dirt particles and moisture into the interior of the cylinder housing.

Method used

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  • Components for protection against dirt in working cylinders
  • Components for protection against dirt in working cylinders
  • Components for protection against dirt in working cylinders

Examples

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Embodiment Construction

[0027] figure 1 A longitudinal section through the master cylinder 1 is shown, which is connected to an actuating pedal (not shown) of the motor vehicle. The master cylinder 1 comprises a cylinder housing 3 in which an axial bore 22 is formed. Arranged in the bore 22 is a piston 5 which is sealed against the bore 22 of the cylinder housing 3 by means of sealing rings 23 , 23 . The piston 5 rests on one side against a spring 8 , which is supported on the housing wall of the cylinder housing 3 . On the other side facing away from the spring 8 , the piston 5 has a preferably spherical recess 11 for receiving the spherical foot 7 of the piston rod 6 .

[0028] The shaft foot 7 rests with its outer circumference on the inner circumference of the depression 11 . The piston rod 6 has a cross section which is smaller than the cross section of the rod foot 7 of the piston rod 6 or the head 9 ( figure 2)Cross-section. When the spring 8 is relaxed, the piston rod 6 protrudes by app...

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PUM

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Abstract

Device for transport protection of an operating lever of an operating pedal in a motor vehicle, comprising a master cylinder, at one end of which a stop ring is arranged for a spring-mounted Piston under pressure. An essentially axially actuated piston rod is provided, the rod foot of which passes through the central bore of the stop ring and acts on the piston head. A rotation safety device for a common radial rotation is arranged between the rod foot of the piston rod and the piston. Furthermore, a stop device limiting the radial rotation of the piston is arranged between the piston and the stop ring.

Description

technical field [0001] The invention relates to an assembly for preventing contamination in a working cylinder, in particular a master cylinder, which is connected to an operating rod of an operating pedal of a motor vehicle. Background technique [0002] An active cylinder for actuating a pedal is known, in which the spherical foot of the piston rod bears against the end face of the piston. The piston is guided inside the cylinder housing and is supported by springs on the side of the cylinder housing which is opposite the piston rod and on which the cylinder housing is closed. A bellows is arranged on the open side of the cylinder housing. The bellows is designed in the form of a tube and accommodates the piston rod therein. In order to seal the bellows relative to the cylinder housing, a sealing lip is provided on the housing-side end of the bellows, which engages in an annular groove which is arranged circumferentially on the outer wall of the cylinder housing. At its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T11/16F15B7/08F16D25/08
CPCB60T11/165F16D25/08F16D25/12F16D2025/081
Inventor P·瓦格纳Y·韦伊
Owner SCHAEFFLER TECH AG & CO KG
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