Fluid device

The fluid device uses a distributor plate with through and connecting groove flow channels to distribute hydraulic oil between fewer and more flow channels, addressing the challenge of size and sealing in conventional designs, resulting in a compact and efficiently operating device with enhanced sealing.

EP4187094B1Active Publication Date: 2024-12-18NABTESCO CORP
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Patent Information

Application Number
EP2022203056
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-11-29
Filing Date
2022-10-21
Publication Date
2024-12-18
Estimated Expiration
2042-10-21

AI Technical Summary

Technical Problem

Conventional fluid devices face challenges in achieving a smaller thickness due to the axial size of the restraining member, which hinders the operation by hydraulic oil and results in difficulties in achieving a smaller thickness and tight sealing.

Method used

A fluid device with a distributor plate sandwiched between two housings, featuring through flow channels and connecting groove flow channels on the end surfaces, allowing fluid distribution between fewer first flow channels and more second flow channels, reducing the device's size and enhancing sealing by eliminating the need for multiple grooves on the outer peripheral surface.

Benefits of technology

The solution enables a compact fluid device design with improved sealing and efficient hydraulic oil distribution, preventing leakage and simplifying manufacturing while maintaining tight sealing without high machining accuracy requirements.

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Abstract

A fluid device (1) relating to the present invention includes a first housing (45) having first flow channels (111 to 114), a second housing (2, 3, 33 and 35) having second flow channels (41 and 42) that are larger in number than the first flow channels (111 to 114), and a distributor plate (100) having a third flow channel connecting together a predetermined one of the first flow channels (111 to 114) and corresponding ones of the second flow channels (41 and 42). The distributor plate (100) is sandwiched between the first housing (45) and the second housing (2, 3, 33, 35) in a thickness direction of the distributor plate (100) such that end surfaces (101 and 102) of the distributor plate (100) are in contact respectively with the first and second housings (45 and 2, 3, 33, 35). The third flow channel (103 to 107) includes: a plurality of through flow channels (103) that are arranged next to each other in a circumferential direction and open at the end surfaces (101 and 102); and one or more connecting groove flow channels (104 and 105) extending in the circumferential direction and connecting together the through flow channels (103).
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Citation Information

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