CN2512978Y

CN2512978Y - Variable multiple head pump

Info

Publication number: CN2512978Y
Application number: CN 01266521
Authority: CN
Inventors: 李萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-09
Filing date: 2001-11-09
Publication date: 2002-09-25
Anticipated expiration: 2011-11-09

Abstract

The utility model discloses a variable multiple head pump, which consists of an end cover, a pump body, a plunger, an eccentric crank shaft rod, a supporting bearing, a rotary bearing, an ail inlet and an oil outlet. the end cover is fixed on the pump body, the plunger is formed by a plunger body and a plunger rod; wherein, the plunger body is arranged in the pump body, one end of the plunger rod is inserted into the plunger body and the other end of the plunger rod is connected with the rotary bearing; moreover, the plunger rod is provided with a spring and is internally provided with an oil intake check valve and an oil outtake check valve. The supporting bearing fixedly arranges the crank shaft in the pump body, and the eccentric crank shaft rod of the crank shaft is provided with a sleeve ring and connected with the rotary bearing, while the other end of the crank shaft is provided with a flat key and a coupling, and the eccentric crank shaft rod is radially provided with a plunger. Without front pump for supplying oil, by the redial plunger moving, the utility model generates even oil feed pump quantity, and ensures perfect static pressure effect, thereby being applicable to various static pressure rails.

Description

The variable multi-head pump

Technical field

The utility model relates to a kind of oil hydraulic pump.

Background technique

In common hydrostatic slideway, generally use gear oil separator or gear pump, exist that fuel feeding point fuel delivery is inhomogeneous, pressure is not high enough, need before to defectives such as oil pump feeds, and the static pressure effect is undesirable.

Summary of the invention

The variable multi-head pump that the purpose of this utility model provides that a kind of pressure is big, fuel delivery is given pump before evenly, not needing.

The purpose of this utility model is achieved in that this pump is by end cap, the pump housing, plunger, bent axle, the eccentric crankshaft bar, block bearing, swivel bearing, filler opening, oil outlet is formed, end cap is fixed on the pump housing, plunger is by plunger body, plunger rod constitutes, plunger body is installed in the pump housing, plunger rod one end inserts plunger body, the other end connects swivel bearing, spring is arranged on the plunger rod, in line check valve and fuel-displaced one-way valve are arranged in the plunger body, block bearing is packed in bent axle in the pump housing, on the eccentric crankshaft bar of bent axle lasso is housed, and connects swivel bearing, the other end of bent axle has flat key and coupling, and plunger radially is installed on the eccentric crankshaft bar.

Stifled in the screw of described in line check valve withstands, the interior stifled positive stop that withstands, the positive stop spring that withstands pressure, pressure spring withstands backstop;

The round wire circlip of described fuel-displaced one-way valve is pushed down backstop, the backstop pressing spring, and spring is pushed down positive stop;

One circle filler opening is arranged on the described end cap, between the end cap and the pump housing seal ring is arranged;

On the described plunger body oil outlet is arranged;

Two loop pillar plugs are arranged on the described eccentric crankshaft bar.

The utility model advantage is to give oil pump feed before not needing, and by the radial plunger motion, produces uniform oil feed pump amount, and has guaranteed good static pressure effect, is applicable in the various hydrostatic slideways.

Below in conjunction with drawings and Examples the utility model is elaborated.

Description of drawings

Fig. 1 is an an embodiment's of the present utility model structural drawing.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is another embodiment's of the utility model a structural drawing.

1. plungers among the figure, 2. end cap, 3. bent axle, the 4. pump housing, 5. oil outlet, 6. filler opening, 7. eccentric crankshaft bar, 8. lasso, 9. flat key, 10. stifled in coupling, 11. swivel bearings, 12. block bearings, 13. springs, 14. plunger rods, 15. fuel-displaced one-way valves, 16. in line check valves, 17. seal rings, 18., 19. screws, 20. plunger bodies, 21. positive stops, 22. pressure springs, 23. backstops, 24. round wire circlips.

Embodiment

Embodiment one, filler opening 6 is connected with fuel tank by external oil pipe, 7 rotations of eccentric crankshaft bar, plunger rod 14 moves down at the pressure effect lower edge of spring 13 bent axle 3 outer surfaces, plunger forms negative pressure in 1 chamber, pressure reaches when overcoming in line check valve 16 pressure spring pressure, in line check valve 16 is opened, oil in the fuel tank is entered by filler opening 6 by oil purifier and oil pipe, enters plunger 1 chamber by oil circuit in end cap 2 pump housings 4 and the plunger body 20 and in line check valve 16, it is full of always, fuel-displaced one-way valve 15 is closed outlet one-way valve 15, along with plunger rod 14 is displaced downwardly to the limit under pressure spring 22 effects, plunger 1 chamber capacity maximum, its oil is charged to maximum flow; Post stockaded village bar 14 begins to rise when eccentric crankshaft bar 7 is rotated further after it turns over several angle, plunger 1 chamber begins to be compressed, oil pressure raises in its chamber, throttle down under the dual-pressure of in line check valve 16 oil pressure in its pressure spring pressure and plunger 1 chamber, and fuel-displaced one-way valve 15 is valve oil pressure in plunger 1 chamber when exceeding oily one-way valve 15 valve pressure springs 22 pressure, be opened, pressure oil is by oil circuit in the plunger body 20 and oil outlet 5 outputs; When eccentric crankshaft bar 7 forwards several angle to, the unnecessary oil that plunger rod 14 moves in peak plunger 1 chamber is all discharged, eccentric crankshaft bar 7 is rotated further plunger rod 14 to begin to descend, produce negative pressure because of vacuum in plunger 1 chamber, fuel-displaced one-way valve 15 is closed under its pressure spring 22 pressure effects, during greater than its valve pressure spring pressure, in line check valve 16 is opened in line check valve 16 in negative pressure, and a new work cycle has begun again.Rotate a circle at eccentric crankshaft bar 7, plunger 1 on the one circle cycle period of respectively working, eccentric crankshaft bar 7 continuous rotary works will guarantee each plunger 1 pressure oil output promptly, because its operation cycle very short (cycle is relevant with bent axle 3 rotating speeds) each point output oil can be considered continuous output.

Filler opening 6 has only one, and the oil circuit of oil-feed is realized UNICOM by structural getting through, and each plunger 1 has an oil outlet 5, realized so a bit advancing, the purpose that multiple spot goes out, and each output point is equivalent to a plunger pump, independent fuel feeding can guarantee the fuel delivery of every point (oil outlet 5) like this.

Plunger 1 is on 12 on even distribution one circle of eccentric crankshaft bar 7 radial direction, have a circle filler opening 6 on the end cap 2, end cap 2 is connected with the pump housing 4 usefulness screws, seal ring wherein is installed, in line check valve 16 inner stifled 18 is pressed into, in oil-feed oil circuit and seal ring 17 are arranged in stifled 18, interior stifled 18 are tightened by screw 19.Fuel-displaced one-way valve 15 is stuck in the plunger body 20 by round wire circlip 24, and round wire circlip 24 must have enough coupling mechanism forces to overcome the pressure that chamber mesohigh oil produces on fuel-displaced one-way valve 15 positive stops 21, and oil outlet 5 is opened on plunger body 20.12 two of block bearings are installed on the bent axle 3,11 1 of swivel bearings, on the eccentric crankshaft bar 7 of bent axle 3 lasso 8 is arranged, plunger rod 14 1 ends insert plunger body 20, the other end connects swivel bearing 11, and spring 13 is arranged on the plunger rod 14, is processed with keyway on bent axle 3 the other ends, and on flat key 9 and coupling 10 are arranged, make it finish the purpose that passes precession power and motion from gearbox or motor.

Embodiment two: two loop pillar plugs 1 are arranged on the eccentric crankshaft bar 7, can increase the quantity of plunger 1 (going out oil drop) like this, because bent axle 3 amounts of deflection are big, can adopt two ends to solve with block bearing 12 fixing modes, other is with embodiment one, Therefore, omited.

Claims

1. variable multi-head pump, this pump is by end cap, the pump housing, plunger, the eccentric crankshaft bar, block bearing, swivel bearing, filler opening, oil outlet is formed, it is characterized in that end cap is fixed on the pump housing, plunger is by plunger body, plunger rod constitutes, plunger body is installed in the pump housing, plunger rod one end inserts plunger body, the other end connects swivel bearing, spring is arranged on the plunger rod, in line check valve and fuel-displaced one-way valve are arranged in the plunger body, block bearing is packed in bent axle in the pump housing, on the eccentric crankshaft bar of bent axle lasso is housed, and the connection swivel bearing, the other end of bent axle has flat key and coupling, and plunger radially is installed on the eccentric crankshaft bar.

2. variable multi-head pump according to claim 1, stifled in the screw that it is characterized in that described in line check valve withstands, the interior stifled positive stop that withstands, the positive stop spring that withstands pressure, pressure spring withstands backstop.

3. variable multi-head pump according to claim 1 is characterized in that the round wire circlip of described fuel-displaced one-way valve is pushed down backstop, the backstop pressing spring, and spring is pushed down positive stop.

4. variable multi-head pump according to claim 1 is characterized in that on the described end cap filler opening being arranged, and between the end cap and the pump housing seal ring is arranged.

5. variable multi-head pump according to claim 1 is characterized in that on the described plunger body oil outlet being arranged.

6. variable multi-head pump according to claim 1 is characterized in that two loop pillar plugs are arranged on the described eccentric crankshaft bar.