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gear pump

A gear pump, pump cover technology, applied in the direction of pump, pump control, pump components, etc., to achieve the effect of reducing the number

Active Publication Date: 2012-02-01
TRW AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But here additional components have to be installed, which increases manufacturing costs

Method used

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Examples

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Embodiment Construction

[0028] figure 1 A gear pump 10 for a vehicle power steering system is shown.

[0029] Here, the housing 12 is composed of a cover part 14 and a pump chamber part 16 connected thereto, in which a pump chamber 18 is formed. The cover portion 14 and the pump chamber portion 16 are formed in this embodiment from two separate components.

[0030] Two intermeshing gear wheels 20 are arranged in the pump chamber 18 . Its axle ends 22 are accommodated in two spectacles-shaped side plates 24, wherein one of the two spectacles-shaped side plates 24 supports the two upper axle ends, while the second spectacles-shaped side plate 24 supports the two lower ones. shaft end 22 .

[0031] Arranged between the cover part 14 and the pump chamber part 16 are two annular seals 26 which are each located in a respective sealing groove 28 in the cover part 14 . The outer one of the two seals 26 here seals the transition from the cover part 14 to the pump chamber part 16 , while the inner one of ...

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Abstract

The invention relates to a gear pump for a power steering device, comprising: a housing (12), in which a pump chamber (18) is formed; and a pump cover (30) delimiting the pump chamber (18) ; Wherein, the pump cover (30) is provided with a sound-absorbing coating (32) and the pump cover has a first fixing structure (250), which is configured for engaging in the housing (212 , 312) in the corresponding second fixed structure (252).

Description

technical field [0001] The invention relates to a gear pump used in a power steering device. Background technique [0002] Such pumps are used as standard in power steering systems of motor vehicles as part of motor-pump assemblies. [0003] Due to their construction, gear pumps tend to be noisy due to the pulsating fluid delivery. Therefore, in addition to striving for a simple and economical manufacture of the pump, there is also a requirement to reduce the noise generation. [0004] Thus, for example, DE 10 2005 002 757 A1 discloses a gear pump in which a flat seal is provided between the pump chamber part of the housing and the pump cover. However, additional components have to be installed here, which increases the manufacturing costs. Contents of the invention [0005] The object of the present invention is to provide a pump which is simple to manufacture and has good noise suppression. [0006] According to the invention, this is achieved in such a way that t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/18F04C15/00
CPCF04C2/18F04C2270/12F04C15/0026F04C2230/91
Inventor M·约尔丹
Owner TRW AUTOMOTIVE GMBH
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