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Manual variable oil pump

A variable oil pump and pump casing technology, applied in the direction of variable displacement pump components, pumps, piston pumps, etc., can solve the problems of increasing, continuous input of manual pressure, and manual work cannot continue, and achieves a simple and compact structure and is convenient for manual labor. Continuous operation, reducing the effect of manual input pressure

Inactive Publication Date: 2015-04-29
XIANGTAN CHUYUAN PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The flow rate of the manual return stroke of the common manual hydraulic jack is relatively fixed. When the pressure of the jacking weight gradually increases, the pressure of the manual input needs to be increased synchronously, which makes it difficult to continuously input the manual pressure; and when the pressure required by the work exceeds the limit of the general human body , manual work cannot continue

Method used

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  • Manual variable oil pump
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Examples

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Embodiment Construction

[0020] see figure 1 , the present embodiment includes a pump casing; also includes a wrench 400, a left side piston group 100 and a right side piston group 101, the left side piston group 100 and the right side piston group 101 respectively include a large piston and a small piston, and the diameter of the large piston is larger than that of the small piston The diameter of the piston; the large pistons of the left side piston group 100 and the right side piston group 101 are connected with the relief valve 500 at the same time; the wrench 400 is connected with the left side piston group 100 and the right side piston group 101 at the same time. The left piston group 100 and the right piston group 101 are arranged in parallel. The left group of pistons 100 includes an upper large piston and a lower small piston connected in sequence, and the right side piston group 101 is the same. The large piston on the left side is provided with a check valve 601, and the small piston at th...

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Abstract

The invention discloses a manual variable oil pump. The manual variable oil pump comprises a pump case, an oil inlet, an oil outlet, a one-way valve, a piston group and an overflow valve, wherein the piston group comprises a first piston and a second piston, the overflow valve is used for adjusting input pressure and output flow and comprises a pressure sampling end and an overflow passage, the overflow passage is communicated with an oil chamber of the first piston, and the pressure sampling end is communicated with the oil outlet. When output oil pressure exceeds a set numerical value of the overflow valve, the overflow valve is opened, the overflow passage is communicated with one piston, then, oil is drained, and the supplying of high-pressure oil is stopped, so that the manual variable oil pump is applicable to the operation of increasing output pressure and reducing the input flow of the oil pump; the manual variable oil pump is simple and compact in structure and is easy to manufacture and machine.

Description

technical field [0001] The invention relates to an oil pump, especially a variable variable oil pump. Background technique [0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and pressure. It is widely used in high-pressure occasions. However, when the output pressure of a general manual oil pump needs to be increased, the pressure or power input manually is required to increase synchronously, which is not conducive to manual continuous operation. [0003] The jack is a lifting device that uses a plunger or a hydraulic cylinder as a rigid jack to lift heavy objects. It has a simple structure, light weight, is easy to carry, and is easy to move. The working principle of the ordinary jack is that the wrench moves up to drive the small piston upward, and the oil in the fuel tank is sucked into the lower part of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B3/00F04B9/14F04B53/10B66F3/25
Inventor 赵耀
Owner XIANGTAN CHUYUAN PRECISION MACHINERY
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