CN2091964U

CN2091964U - Wobble pump with changeable output

Info

Publication number: CN2091964U
Application number: CN 91212799
Authority: CN
Inventors: 朱福民; 李万莉
Original assignee: CHANGSHA BUILDING MACH
Current assignee: CHANGSHA BUILDING MACH
Priority date: 1991-06-08
Filing date: 1991-06-08
Publication date: 1992-01-01

Abstract

The utility model discloses a wobble pump with changeable output, which relates to a wobble pump, and the wobble pump with changeable output is mainly used for engineering machinery. The wobble pump with changeable output is mainly composed of a pump body (16), pistons (10), (12), a rocker (8), a slide valve (5), check valves (1), (2), (3), etc. The utility model is provided with two hydraulic oil cavities (9), (11), the hydraulic oil cavities (9), (11) can simultaneously work, or the hydraulic oil cavities (11) singly work according to different external loads, which can realize that oils can be exported with high-pressure and small displacement when the hydraulic oil cavity bears heavy-load, and the oils can be exported with low pressure and large displacement when the hydraulic oil cavity bears empty load or light load, which increases work efficiency. The utility model has the advantages of simple structure, easy production, low cost, convenient use, high work efficiency, etc.

Description

Wobble pump with changeable output

The manual pump that discharge capacity is variable relates to manual pump.Be mainly used in engineering machinery.

Existing manual pump is to utilize manpower to pull rocking bar, makes reciprocating motion of the pistons, oil is sucked or extrudes pumping cavity.Because the pumping cavity discharge capacity is constant, no matter outer load is zero load, underloading or heavy duty, the oil mass of each operation cycle output is constant, so the working efficiency of whole hydraulic system is lower.

The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of discharge capacity variable manual pump.

The utility model is achieved in that and has pumping cavity (9), (11) and piston chamber (18) in the pump housing (16), piston (10), (12) and guiding valve (5) are housed respectively in pumping cavity (9), (11) and the piston chamber (18).The upper end of rocking bar (8) and the pump housing (16) are articulated in the A point, and rocking bar (8) is articulated in C, B point respectively with piston (10), (12).Pumping cavity (9) communicates with oil outlet (13) by one-way valve (1), (2) by one-way valve (3), oil duct (7) the ， And that communicates with piston chamber (18) top.Pumping cavity (11) communicates with oil outlet (13) by one-way valve (1) by one-way valve (2) the ， And that communicates with pumping cavity (9).Inlet port (4) communicates with the top of piston chamber (18).Between guiding valve (5) and the spring pedestal (17) pressure spring (6) is housed, guiding valve (5) is drilled with through hole (19), and the bottom of piston chamber (18) communicates with inlet port (4) by through hole (19).

Accompanying drawing is a structural drawing of the present utility model.

Existing accompanying drawings is as follows:

When outer load is zero load or underloading, the oil pressure that oil outlet (13) is located is lower, the distance that guiding valve (5) moves down is little, be not enough to open oil duct (7), so, this moment, fluid was sucked pumping cavity (9), (11) by inlet port (4), one-way valve (3), (2) back respectively by piston (10), (12) when upwards pulling rocking bar (8).When depressing rocking bar (8), fluid is exported from oil outlet (13) by one-way valve (1), (2).At this moment, the discharge capacity of output oil is the discharge capacity sum of pumping cavity (9) and pumping cavity (11).The big discharge capacity output of low pressure when having realized zero load or underloading.

When outer load is when heavy duty, the oil pressure that oil outlet (13) is located is higher, and the elastic force that is enough to overcome pressure spring (6) makes guiding valve (5) move down enough distances, until opening oil duct (7).In the case, rocking bar (8) is upwards pulled, fluid still is inhaled into pumping cavity (9), (11).Then rocking bar (8) is depressed, from oil outlet (13) output, the fluid in the pumping cavity (9) is then got back to inlet port (4) by oil duct (7) to the fluid in pumping cavity this moment (11) by one-way valve (1).At this moment, the discharge capacity of output oil is the discharge capacity of pumping cavity (11).Realized high pressure float amount output when heavily loaded.

Unscrew oil return screw (14), can make high pressure oil pass through one-way valve (15) and get back to inlet port (4) and locate, finish unloading function.

The utility model has two pumping cavities (9), (11), difference according to outer load, both can work simultaneously by two pumping cavities (9), (11), also can work independently by pumping cavity (11), like this, just can realize fluid high pressure float amount output when heavy duty, the big discharge capacity output of low pressure when zero load or underloading.Compared with prior art, under the situation of lifting capacity, therefore the output discharge capacity of fluid when having improved zero load or underloading, has accelerated the operating rate of whole hydraulic system when zero load or underloading, has improved working efficiency when not influencing heavy duty.

The utlity model has the advantages such as simple in structure, easy to manufacture, cheap, easy to use, operating efficiency height.

Claims

1, the variable manual pump of discharge capacity relates to manual pump, comprises the pump housing [16], rocking bar [8], it is characterized in that:

A. have pumping cavity [9], [11] and piston chamber [18] in the pump housing [16];

B. in pumping cavity [9], [11] and the piston chamber [18] piston [10], [12] and guiding valve [5] are housed respectively;

C. the upper end of rocking bar [8] and the pump housing [16] are articulated in the A point, and rocking bar [8] is articulated in C, B point respectively with piston [10], [12];

D. pumping cavity [9] communicates with oil outlet [13] by one-way valve [1], [2] by one-way valve [3], oil duct [7] the ， And that communicates with piston chamber [18] top;

E. pumping cavity [11] communicates with oil outlet [13] by one-way valve [1] by one-way valve [2] the ， And that communicates with pumping cavity [9];

F. inlet port [4] communicates with the top of piston chamber [18];

G. between guiding valve [5] and the spring pedestal [17] pressure spring [6] is housed;

H. guiding valve [5] bottom that is drilled with through hole [19], piston chamber [18] communicates with inlet port [4] by through hole [19].