CN2195642Y

CN2195642Y - Hydraulic mechanism with double-action plunger pump

Info

Publication number: CN2195642Y
Application number: CN 94216192
Authority: CN
Inventors: 张洪达; 张小峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-27
Filing date: 1994-06-27
Publication date: 1995-04-26
Anticipated expiration: 2004-06-27

Abstract

The utility model relates to a hydraulic mechanism with a double-action plunger pump, which is proposed for providing the hydraulic mechanism has the advantages of high efficiency, simple structure, light self weight, compact dimension and good use performance. The utility model is composed of a working cylinder, an oil tank, a double-action plunger pump, an oil path and a control valve, wherein, the double-action plunger pump is composed of a plunger, a detachable pump body and a driving member; the detachable pump body is a left and a right sleeves which are positioned in the coaxial line in the oil tank; both ends of the plunger are arranged in the left and the right sleeves so that a left and a right working chambers are formed among the two ends of the plunger and the detachable pump body; the middle section of the plunger is provided with a rack; the driving member is composed of a rocking arm, a rocking arm shaft and a gear; the shaft line of the rocking arm shaft is perpendicular to the shaft line of the plunger; the rocking arm and the gear are fixedly arranged on the rocking arm shaft; the gear is engaged with the rack on the plunger.

Description

Hydraulic mechanism with double-action plunger pump

The utility model belongs to the mechanism of fluid varactor machine, and particularly one respectively with the hydraulic mechanism of double-action plunger pump.

The small-sized hand-operated hydraulic tools such as hydraulic track lifting and lining machine, hydraulic pressure rail jack and hydraulic square-positioning apparatus for rail-tie laying that use in the present railway track maintenance operation, usually adopt and form hydraulic mechanism by clutch release slave cylinder, oil circuit, control valve, fuel tank and pump, the pump of these hydraulic mechanisms or be manual double plunger pump, or be manual single plunger pump, former structure complexity, boundary dimension are big and from heavy, the latter exists then that efficient is low, the motion parts of pump exposes, lubricated difficulty, the deficiency that the usability of facility is worsened.

The purpose of this utility model provide a kind of efficient height, simple in structure, from the hydraulic mechanism of heavy and light, compact dimensions, the band double-action plunger pump that is applicable to small-sized hand-operated hydraulic tools that usability is good.

The utility model is made up of clutch release slave cylinder, fuel tank, double-action plunger pump, oil circuit and control valve, and clutch release slave cylinder is made up of piston and cylinder body, and piston places in the cylinder body, and cylinder body is divided into rod chamber and rodless cavity; Fuel tank is positioned on the clutch release slave cylinder cylinder body; Double-action plunger pump is made up of plunger, the split type pump housing and actuator, the split type pump housing is the left and right cover of coaxial line that is positioned at fuel tank, the two ends of plunger place in the left and right cover of the split type pump housing, and making its two ends constitute left and right active chamber respectively and between the split type pump housing, its stage casing is provided with tooth bar; Actuator is made up of rocking arm, pitman arm shaft and gear; the axis of pitman arm shaft is vertical with plunger axis; rocking arm and gear are fixedly mounted on the pitman arm shaft; the tooth bar engagement on gear and the plunger, and oil circuit is made of drainback passage between two output channels, clutch release slave cylinder rodless cavity and the fuel tank between two input channels, the left and right active chamber of double-action plunger pump and the clutch release slave cylinder rodless cavity and the connecting passage between overflow ducts and clutch release slave cylinder rod chamber and the fuel tank between left and right active chamber of double-action plunger pump and the fuel tank; Control valve is by laying respectively at one-way valve on input, the output channel, being positioned at the scavenger valve on the drainback passage and the relief valve that is positioned on the overflow ducts constitutes.

Because the utility model adopts double-action plunger pump, and make double-action plunger pump be positioned at fuel tank, guaranteed the lubricated of movement parts, during work, the plunger to-and-fro motion is all working stroke, high working efficiency not only, and because of having saved a plunger pump, make mechanism structure simple, little, thereby reach the purpose of this utility model from heavy and light, boundary dimension.

Fig. 1 is the utility model structural representation front view

Fig. 2 is the utility model structural representation plan view

Fig. 3 is A-O-O ' among Fig. 2-B sectional drawing

Fig. 4 is C-O-O ' among Fig. 3-D sectional drawing

Fig. 5 is E-O-O ' among Fig. 3-D sectional drawing

Fig. 6 is a F-F sectional drawing among Fig. 1

Fig. 7 is G-O-O ' among Fig. 1-G sectional drawing

Fig. 8 is the utility model hydraulic system principle figure.

Below in conjunction with accompanying drawing the utility model is further elaborated.

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, the utility model is made up of clutch release slave cylinder 1, fuel tank 2, double-action plunger pump 3, oil circuit 4 and control valve 5, clutch release slave cylinder 1 is made up of piston 11 and cylinder body 12, cylinder body 12 has the main body 121 of band through hole 1211, left side cylinder cap 122 and right cylinder cap 123, right cylinder cap 123 is provided with through hole 1231, and left and right cylinder cap 122,123 is installed in the two ends of the through hole 1211 of main body 121 respectively; Piston 11 is made of piston head 111 and piston rod 112, and the external diameter of the external diameter of piston head 111 and piston rod 112 matches with through

hole

1211 and 1231 respectively, and piston 11 places in the cylinder body 12, and cylinder body 12 is divided into rod chamber 124 and rodless cavity 125; Fuel tank 2 is provided with tank filler sleeve 21 for the main body 121 by cylinder body 12 extends upward the hollow casing that constitutes above fuel tank 2; As shown in Figure 6, double-action plunger pump 3 is by plunger 31, the split type pump housing 32 and actuator 33 constitute, the split type pump housing 32 is for being positioned at fuel tank 2 and being from fuel tank 2 left sides, the coaxial line left side that right side wall extends internally, right cover 321,322, a left side, right cover 321,322 outboard end is provided with a left side, right sealing oil stifled 323,324, plunger 31 is a Cylinder, its two ends place the left side of the split type pump housing 32 respectively, right cover 321, in 322, and make its two ends constitute a left side respectively and between the split type pump housing 32, right active chamber 34,35, its stage casing is provided with tooth bar 311, as shown in Figure 3, actuator 33 is by rocking arm 331; pitman arm shaft 332 and gear 333 formed; pitman arm shaft 332 be installed in fuel tank 2 before; on the rear wall; and make its front end 3321 stretch out outside the fuel tank 2; rocking arm 331 is provided with extension bar hole 3311; it is installed on the front end 3321 of pitman arm shaft 332; gear 333 is preferably the fan tooth; it is installed in the stage casing of pitman arm shaft 332; and make the gear teeth on it mesh; the parallel axes of the axis of the split type pump housing 32 and clutch release slave cylinder 1, the axis normal of the axis of pitman arm shaft 332 and plunger 31 with the tooth bar on the plunger 31 311; As shown in Figure 8, oil circuit 4 is by two

input channels

41,42, article two,

output channel

43,44, drainback passage 45, overflow ducts 46 and connecting passage 47 constitute, connecting passage 47 is between the rod chamber 124 and fuel tank 2 of clutch release slave cylinder 1,

output channel

43,44 lay respectively at the left side of double-action plunger pump 3, right active chamber 34,35 and the rodless cavity 125 of clutch release slave cylinder 1 between,

input channel

41,42 lay respectively at the left side of double-action plunger pump 3, right active chamber 34,35 and fuel tank 2 between, it is respectively equipped with and is positioned at a left side, right sealing oil stifled 323, central blind hole 3231 on 324,3241 and annular groove 3232,3242, drainback passage 45 between the rodless cavity 125 and fuel tank 2 of clutch release slave cylinder 1, overflow ducts 46 in

output channel

43,44 and fuel tank 2 between; Each passage of oil circuit 4 is arranged on the cylinder body 12 and extended fuel tank 2 thereof of clutch release slave cylinder 1; The scavenger valve 55 that control valve 5 lays respectively at one-

way valve

51,52,53,54 on input, the

output channel

41,42,43,44, be positioned on the drainback passage 45 becomes with structure of relief valve on being positioned at overflow ducts 46, as shown in Figure 7, scavenger valve 55 is made of handle 551, eccentric wheel 552, pin 553, push rod 554 and one-way valve 555.

During use, handle the handle 551 of scavenger valve 55, make scavenger valve 55 in the closed position, operating rock arm 331, and through pitman arm shaft 332, tooth bar 311 on gear 333 and the plunger 31 makes the left side of plunger 31 at the split type pump housing 32, right cover 321, to-and-fro motion in 322, and make the left active chamber 34 of two use plunger pumps 3 compress intracavity liquids, after the supercharging respectively in the rodless cavity 125 of one-way valve 53 and output channel 43 input service cylinders 1, right active chamber 35 volumes of double-action plunger pump 3 increase, liquid in the rod chamber 124 of fuel tank 2 and clutch release slave cylinder 1 is through input channel 42, the annular groove 3242 of sealing oil stifled 324, central blind hole 3241 and one-way valve 52 enter in the right active chamber 35, and so forth, the fluid pressure of the rodless cavity 125 of clutch release slave cylinder 1 is increased gradually, and piston 11 is extrapolated towards cylinder body 12, drive actuator's work.

When operation finishes, open scavenger valve 55, make the rodless cavity 125 interior liquid of clutch release slave cylinder 1 go into fuel tank 2 45 times through scavenger valve 55 and drainback passage.

Internal pressure increases when system, and when surpassing the limit value of relief valve 56, relief valve 56 is opened, and makes the rodless cavity 125 interior pressured fluids of clutch release slave cylinder 1 flow into fuel tanks 2, system's release through relief valve 56 and overflow ducts 46.

Claims

1, the hydraulic mechanism of band double-action plunger pump, it is by clutch release slave cylinder, fuel tank, pump, oil circuit and control valve are formed, clutch release slave cylinder is made up of piston and cylinder body, piston places in the cylinder body, and cylinder body is divided into rod chamber and rodless cavity, fuel tank is positioned on the clutch release slave cylinder cylinder body, oil circuit is by the pump input channel, the pump output channel, drainback passage, overflow ducts and connecting passage are formed, control valve is by input, one-way valve on the output channel, scavenger valve on the drainback passage and the relief valve on the overflow ducts are formed, it is characterized in that described pump is a double-action plunger pump, it is by plunger, the split type pump housing and actuator are formed, the split type pump housing is a coaxial line left side that is positioned at fuel tank, right cover, the two ends of plunger place the left side of the split type pump housing, in the right cover, and make its two ends respectively and constitute a left side between the split type pump housing, right active chamber, its stage casing is provided with tooth bar; Actuator is made up of rocking arm, pitman arm shaft and gear, and the axis of pitman arm shaft is vertical with plunger axis, and rocking arm and gear are fixedly mounted on the pitman arm shaft, the tooth bar engagement on gear and the plunger; Input channel is the two passes between left and right active chamber of double-action plunger pump and fuel tank; Output channel is the two passes between left and right active chamber of double-action plunger pump and clutch release slave cylinder rodless cavity.

2, the hydraulic mechanism of band double-action plunger pump according to claim 1 is characterized in that described clutch release slave cylinder cylinder body and fuel tank are siamese part; The left and right cover of the split type pump housing of double-action plunger pump for extending internally from the left and right sidewall of fuel tank.

3, the hydraulic mechanism of band double-action plunger pump according to claim 1 and 2 is characterized in that the axis of the parallel axes of described double-action plunger pump in clutch release slave cylinder.

4, the hydraulic mechanism of band double-action plunger pump according to claim 3, it is stifled to it is characterized in that being provided with sealing oil in the left and right cover outside of the split type pump housing of described double-action plunger pump; Article two, input channel has respectively and is positioned at central blind hole and the annular groove of left and right sealing oil on stifled.