Distributing shaft with fault-tolerant function and manual hydraulic pump equipped with the distributing shaft
A fault-tolerant, shaft-distributing technology, which is applied to the components of the pumping device for elastic fluids, variable-capacity pump components, pumps, etc., to achieve the effect of short opening length and favorable rigid seal
Inactive Publication Date: 2016-08-24
上海中欧汽车电器有限公司 +1
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Problems solved by technology
[0005] The primary technical problem to be solved by the present invention is to provide a distribution shaft that is not in place when it is rotated to the lowered position, resulting in a certain error in the matching angle between the shaft hole system and the pump body hole system, which can still ensure the shaft body hole system and the pump body hole. distribution shaft with normal conduction
Method used
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[0031] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, and the advantages of the present invention and outstanding contributions relative to the prior art will be further clarified. It can be understood that the following examples should not be construed as limiting the technical solution of the present invention.
[0032] Such as figure 2 , 3 As shown, a distribution shaft, a plunger 40 and the like are integrated inside the pump body 30 , an oil tank 50 is integrated on the side, and a switching handle for rotating the distribution shaft is fixed on the outer end surface of the distribution shaft. The oil return port 31 of the pump body communicates with the oil tank 50, and the D hole section 32 and the E hole section 33 respectively communicate with the lower cavity (rodless cavity) and upper cavity (with Rod cavity) connected.
[0033] Such as Figure 4 As shown, the shaft hole system ...
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The invention discloses a distribution shaft with a fault-tolerant function and a manual hydraulic pump provided with the distribution shaft. According to the technical scheme, the distribution shaft has the fault-tolerant function, and comprises a shaft body, A hole cavities, a B hole cavity, a C hole cavity, arc-shaped oil passing grooves and axial oil passing grooves, wherein the A hole cavity, the B hole cavity and the C hole cavity are formed along the radial direction of the shaft body, and the arc-shaped oil passing grooves and the axial oil passing grooves are formed in the circumference of the shaft body and are communicated with one another. The distribution shaft has the advantages that an arc-shaped pressure releasing groove located in the same radial section as the B hole cavity and tangent with the axial oil passing grooves is formed along the circumference from the B hole cavity to the axial oil passing grooves. The arc-shaped oil passing grooves are located in the same radial section as the A hole cavity, formed in the circumference between the A hole cavities and is not communicated with the A hole cavities. A matching angle of a shaft body hole system and a pump body hole system is increased so that even if a switching handle is not totally in a descending position, normal communication of the shaft body hole system and the pump body hole system can be achieved.
Description
technical field [0001] The invention relates to a hydraulic tilting and lifting device for lifting a car cab or similar devices, in particular to a manual hydraulic pump used to provide power in the hydraulic tilting and lifting device, especially to the distribution shaft of the hydraulic pump. Background technique [0002] The present invention is a further improvement aimed at the publication number CN 102828945 A patent document. Such as figure 1 As shown, this patent document specifically discloses a manual hydraulic pump with double sealing functions of rigidity and flexibility, its shaft body is provided with A cavity, B cavity, and C cavity with different positions and angles; and the B cavity There is an arc-shaped oil passage groove and an axial oil passage groove tangent to it on the circumferential surface between the hole A and the cavity. When the vehicle is moving, the switching handle of the hydraulic pump should be in the down position. At this time, the ...
Claims
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IPC IPC(8): F04B53/00F04B9/14
Inventor 吴国琳戴宇新
Owner 上海中欧汽车电器有限公司