Collapsible Hand Pump

Abstract

The invention discloses a foldable hand pump, comprising a pump frame, a pump body, a crank handle and a handrail; the pump frame is divided into an upper bracket, a lower bracket and a folding mechanism connecting the upper and lower brackets; the folding mechanism is symmetrically arranged, comprising: a main board , its inner surface is provided with three pin shaft holes, and the three pin shaft holes are respectively equipped with pin shafts; the ratchet wheel is fixed on the pin shaft at the inner top of the main board; the pawl is fixed on the pin shaft at the inner bottom of the main board, and the pawl The convex teeth of the ratchet are engaged with the concave teeth of the ratchet; the fixing plate is inserted on the three pin shafts and fastens the ratchet and the pawl together with the main board; the two ends of the toggle link are respectively connected with two symmetrical pawls ;The side edge of the extension connecting part of the ratchet is fixedly connected with the upper bracket, and the lower edge of the main board is fixedly connected with the lower bracket; wherein, the pump body is arranged on the upper bracket, the handrail is arranged on the upper bracket, and the rocker is installed on the rocker arm of the pump body. Bundle. The foldable hand pump provided by the invention has the characteristics of simple operation, rapid unfolding and retracting, small occupied space after folding, strong stability and the like.

Description

technical field [0001] The invention relates to a hand pump, in particular to a hand pump which is easy to operate, quickly unfolded and retracted, takes up little space after being folded, and has strong stability. Background technique [0002] With the development of industry, oil has become a necessity in life. With the popularity of oil, machines such as hand pumps have also appeared in our field of vision. Hand-operated pump refers to the pump that works by shaking the pump shaft by hand. The flow rate is generally tens of liters per minute. It has the characteristics of simple operation and flexible operation. Used in the oil field, it can add oil to scattered vehicles and construction machinery, pour oil between different oil storage containers, collect residual oil at the bottom of the barrel or oily sewage, and collect leaked residual oil, etc. Since the hand pump came out, it has been widely used in a large number of applications. Currently, there are many types ...

AI Technical Summary

Problems solved by technology

Most of the hand pumps on the market were developed in the 1950s and 1960s. They have the disadvantages of large size, waste of space, inability to fold, and not easy to carry.

[0003] The hand pumps disclosed in Chinese patent applications 201110453105.9 and 201120565644.7 for refueling work have improved the old hand pumps, updated the pump body, and changed the pump frame to a disassembled and assembled frame structure, reducing the volume and lightening The weight is reduced and the efficiency is improved, but the installation and disassembly process requires a multi-component plug-in combination, and it is difficult for untrained users to operate proficiently

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