Title:
OIL CIRCUIT CONTROL DEVICE AND STREET SWEEPING VEHICLE
Document Type and Number:
WIPO Patent Application WO/2021/073067
Kind Code:
A1
Abstract:
An oil circuit control device and a street sweeping vehicle, comprising a first overflow valve (221), a first three-position four-way directional reversing valve (11), and a second three-position four-way directional reversing valve (12). The first three-position four-way directional reversing valve (11) and the second three-position four-way directional reversing valve (12) are M-type reversing valves; an oil inlet of the first overflow valve (221) is connected to an oil inlet of the first three-position four-way directional reversing valve (11); an oil return port of the first overflow valve (221) is connected to an oil inlet of the second three-position four-way directional reversing valve (12); an oil return port of the first three-position four-way directional reversing valve (11) is connected to the oil inlet of the second three-position four-way directional reversing valve (12); an output end of the first three-position four-way directional reversing valve (11) is connected to a sucker height-adjusting oil cylinder (233); an output end of the second three-position four-way directional reversing valve (12) is connected to a first hydraulic motor (231). On the basis of series connection and the arrangement of the overflow valve, rotation of a sweeper is not affected while a sucker ascends and descends, and therefore, it is achieved that the sucker and the sweeper can operate at the same time; by using a serial oil circuit layout, an oil circuit structure is simplified, and the circuit layout of the street sweeping vehicle is optimized.
Inventors:
WANG SHAOCUI (CN)
Application Number:
PCT/CN2020/087070
Publication Date:
April 22, 2021
Filing Date:
April 26, 2020
Export Citation:
Assignee:
ZHUHAI EWA ELECTRIC VEHICLE CO LTD (CN)
International Classes:
E01H1/08; F15B13/02
Foreign References:
| CN110671381A | 2020-01-10 | |||
| CN110725255A | 2020-01-24 | |||
| CN210859392U | 2020-06-26 | |||
| CN108105186A | 2018-06-01 | |||
| CN103233935A | 2013-08-07 | |||
| CN109268333A | 2019-01-25 | |||
| CN106593981A | 2017-04-26 | |||
| CN110254509A | 2019-09-20 | |||
| CA2026153A1 | 1991-04-18 |
Attorney, Agent or Firm:
INNOPAT INTELLECTUAL PROPERTY CO., LTD. (CN)
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