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Distributing shaft and manual hydraulic pump provided with same

A technology of distributing shaft and hydraulic pump, which is applied to the components of pumping device for elastic fluid, pump, piston pump, etc., can solve the problems that the sealing sleeve is easily scratched and the distribution shaft hole cannot be rigidly sealed, and achieves the sealing effect. Good, easy to process, small opening area

Inactive Publication Date: 2012-12-19
上海中欧汽车电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Through analysis, the design defects of the existing technology are: in order to realize the pressure relief function, the distribution shaft hole system is designed to be opened in the annular groove, so that the sealing sleeve is easily scratched and the gap between the distribution shaft hole system and the pump body cannot be reached. rigid seal

Method used

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  • Distributing shaft and manual hydraulic pump provided with same
  • Distributing shaft and manual hydraulic pump provided with same
  • Distributing shaft and manual hydraulic pump provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 2 , 3 As shown, a distribution shaft, a plunger 40 and the like are integrated inside the pump body 30 , and an oil tank 50 is integrated on the side. The oil return port 31 of the pump body communicates with the oil tank 50, the D hole section 32 and the E hole section 33 are set inside the lower end of the pump body 30, and their outer ends are respectively connected with the lower chamber oil nozzle 35 and the upper chamber oil nozzle 34 at the bottom of the pump body 30 by threads. connected. The upper and lower cavity nozzles 34, 35 communicate with the upper cavity (rod cavity) and the lower cavity (rodless cavity) of the hydraulic cylinder (not shown in the figure) through high-pressure oil pipes.

[0052] Such as Figure 4 , 5 As shown, the distribution shaft body 10 is cylindrical as a whole, and the shaft core is provided with a pressure accumulator chamber 11, and the hole system A cavity 12, B cavity 13, and C cavity 14 are respectively p...

Embodiment 2

[0059] The difference between this embodiment and Embodiment 1 is that the design of the oil passage groove is different. The oil passage groove of Embodiment 1 is composed of an axial oil passage groove 17 and an arc oil passage groove 18 to form a shape similar to "L". The oil passage groove of this embodiment is An arc-shaped groove spirally rotating around the axis on the circumferential surface of the shaft body 10. If this part of the circumferential surface is unfolded as a plane, this arc-shaped groove is a diagonal groove, and the two ends of its length are respectively connected to the oil return of the pump body. The port 31 and the D hole section 32 are like the projection of the line from the oil return port 31 of the pump body to the D hole section 32 on the peripheral surface of the valve body. The design of the oil passage groove in this embodiment has a small opening area on the circumferential surface, which is beneficial to the rigid seal between the distribu...

Embodiment 3

[0061] The difference between this embodiment and the first and second embodiments is that the design of the oil passage groove is different. With reference to the direction in which the distributing shaft rotates from the rising position to the downward position, the oil passage groove in this embodiment is an arc-shaped cavity opened on the circumferential surface ranging from the B cavity 13 to the A cavity 12, and its opening area ensures that the D hole section 32. The oil return port 31 of the pump body is within its coverage area. This design makes the area of ​​the oil passage groove larger, which is not conducive to the rigid seal between the distribution shaft and the pump body.

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Abstract

The invention discloses a distributing shaft and a manual hydraulic pump provided with the distributing shaft. The technical scheme is that the distributing shaft for the hydraulic pump comprises a shaft body, a pressure storing chamber as well as a hole chamber A, a hole chamber B and a hole chamber C which are respectively communicated with the pressure storing chamber and are respectively arranged on different sections based on a radial section of the shaft body served as the reference, and the hole chamber A and the hole chamber B are in different angles; an oil flowing groove is arranged on the circumference of the shaft body, and at least one part of the oil flowing groove is placed on the same section with the hole chamber A, and at least the other part of the oil flowing groove is positioned on the same section with the hole chamber B; and the oil flowing groove is distributed on the circumference face between the hole chamber B and the hole chamber A based on a direction to which the distributing shaft rotates from a lifting position to a lowering position served as the reference. According to the distributing shaft and the manual hydraulic pump provided with the distributing shaft, a sealing mode in combination of rigidity and flexibility is adopted; a sealing sleeve is hardly rubbed through a porthole, so that the good sealing performance is ensured, and high durable performance is 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] It is known that if the cab of the car needs to be turned over a large angle, especially when the center of gravity is turned over, the cab cannot be lowered by its own weight, and a double-circuit hydraulic tilting and lifting device is needed, which uses the retraction of the hydraulic cylinder rod to drive the driving. The chamber turns over the center of gravity to realize the descent. [0003] In the prior art, the manual hydraulic pump that provides power for this dual-circuit hydraulic tilting and lifting device includes an oil tank, a pump body, a plunger integrated in the pump body, and a distribution shaft (the distribution shaft is in engineer...

Claims

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Application Information

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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
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