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Multi-piece piston for active cylinders and active cylinder unit

An active cylinder, multi-piece technology, applied in the directions of pistons, cylindrical pistons, engine components, etc., can solve the problems of small stiffness/strength, high cost, manufacturing trouble, etc., and achieve the effect of improving sealing reliability.

Inactive Publication Date: 2018-12-18
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of thermosetting plastic configurations, the first problem is their high cost, since they are complex to produce
[0005] A further disadvantage of the thermosetting plastic configurations of the prior art is that, although they achieve a highly reliable sealing function, they have too little stiffness / strength to ensure that the piston is on top of the cylinder Firm and reliable stop in dead center position

Method used

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  • Multi-piece piston for active cylinders and active cylinder unit
  • Multi-piece piston for active cylinders and active cylinder unit
  • Multi-piece piston for active cylinders and active cylinder unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] figure 1 A piston 1 is shown, which is arranged in a hydraulic master cylinder 2 . The piston 1 is coupled to a piston rod 4 via a piston rod receptacle 3 . Furthermore, the piston 1 is constructed in multiple parts such that a guide sleeve 5 for sliding contact with the master cylinder 2 surrounds a core 6 which is independent of the guide sleeve 5 . The circle indicated by the X is further explained below Figure 10 shown in detail.

[0060] exist Figure 2a A first embodiment of the piston 1 and the piston rod 4 is shown in an exploded view. An O-ring 7 is arranged as a seal on the end of the core 6 facing the piston rod receptacle 3 . The piston rod receiver 3 has a fir-like structure in order to achieve radial expansion around the ball head of the piston rod 4 .

[0061] exist Figure 2b As can be seen in the longitudinal section shown in , the guide sleeve 5 is substantially cylindrical. The sleeve shoulder 8 protrudes towards the axis of rotation of the g...

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PUM

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Abstract

The invention relates to a piston (1) for a hydraulic master cylinder (2). The piston (1) is arranged to be axially displaced in the master cylinder (2) in response to introduction of an active pedalforce, so that the hydraulic medium is discharged here, wherein the piston rod receiving portion (3) can be fixed to the piston (1) in order to transmit an axial force introduced by the piston rod (4)to the piston (1), wherein the piston (1) is configured in multiple parts such that a guide sleeve (5) for slidingly contacting the master cylinder (2) encloses a core (6) independent of the guide sleeve (5).

Description

technical field [0001] The invention relates to a piston for a hydraulic master cylinder, said piston being arranged to be displaced axially in the master cylinder mechanically in response to the introduction of an active pedal force, in order here to discharge hydraulic medium from the master cylinder and to actuate it from the cylinder unit. In this case, the piston rod receptacle can be fixed / fixed on the piston in order to transmit the axial force introduced by the piston rod to the piston. [0002] Furthermore, the invention relates to a master cylinder unit having a piston according to the invention and a hydraulic master cylinder. Background technique [0003] Such a piston or master cylinder unit is known, for example, from the publication DE 10 2008 010 448 A1. A master cylinder for hydraulic clutch actuation or hydraulic brake actuation is disclosed therein. The master cylinder is arranged in a housing, in which a piston is mounted so that it can move axially by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/14F15B15/20
CPCF15B15/1423F15B15/1447F15B15/20F15B7/08F15B2215/305F16D2048/0212F16J1/005
Inventor A·加朗A·舍韦
Owner SCHAEFFLER TECH AG & CO KG
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