CN104057631A - Jack hydraulic press - Google Patents

Abstract

The invention relates to a jack hydraulic press and belongs to the field of pressure machines. The jack hydraulic press comprises a frame consisting of an upper transverse beam, a lower transverse beam, a first longitudinal arm, a second longitudinal arm, a rack, a working oil cylinder; a hydraulic pump station and an operating mechanism, wherein the hydraulic pump station comprises a valve body, a pump body and an oil storage tank, the valve body is arranged on one side, opposite to the second longitudinal arm, of the first longitudinal arm, the pump body is matched with the valve body and the oil storage tank is connected with the valve body. The jack hydraulic press is characterized in that the operating mechanism comprises a pressing handle base, a pressing handle, a pedal arm, a pull rod and a pull rod return spring, one end of the pressing handle base is hinged with the valve body, the middle part of the pressing handle base is hinged with the pump body, the other end of the pressing handle base is hinged with the upper end of the pull rod, the lower end of the pull rod is hinged with the pedal arm, one end of the pedal arm is hinged with the first longitudinal arm, the other end of the pedal arm is a free end and forms a pedal, the pressing handle is matched with the pressing handle base in a pluggable manner, the upper end of the pull rod return spring is fixedly arranged on the first longitudinal arm and the lower end of the pull rod restoring spring is fixedly arranged on the pull rod. Since the pump body of the hydraulic pump station can be operated through not only the pressing handle but also the pedal arm, the selection flexibility is high.

Description

Jack hydraulic press

Technical field

The invention belongs to press field, be specifically related to a kind of jack hydraulic press.

Background technology

For large-scale hydraulic press (also claiming hydraulic press), jack hydraulic press can play the effect of picking up the neglected and to supply the deficient, and is embodied in application places wide adaptability, volume little, easy to operate, relatively cheap etc.But large-scale or medium-small hydraulic press is contrary, need that supporting corresponding Hydraulic Station, overall volume are large, the bad adaptability to field of employment, equipment cost are high, invest and to manage and protect difficulty large.There is aforementioned strong point large-scale and even that medium-small hydraulic press can not match in excellence or beauty just because of jack hydraulic press, thereby production line, construction site, maintenance of electromechanical equipment industry, the vehicle maintenance industry of factory were both can be used on, also can be equipped with in the family, also can be in the configuration of all kinds of technical schools and as the educational aid of culture technique workman's manipulative ability.Taking the production line of factory as example, can be used for parts to be pressed in another parts, realize two assemblings between parts; Take construction site as example, correct by bending scaffold steel pipe straightening and by the parts of fastener clip of various distortion and so on; Taking electromechanical equipment and vehicles repairing trades as example, can correct the deflection producing such as parts in cutting, welding or cold-working process; Taking family's use as example, can be used for the ironware in daily life to repair; Taking technical school as example, for cultivating students practise manipulative ability for move towards social lay a good foundation later.

About the technical information of jack hydraulic press, in disclosed Chinese patent literature, be no lack of and be seen in, slightly with exemplify as CN201205566Y (jack hydraulic press), CN2144571Y (hand-operated hydraulic press), CN201385455Y (hand screw adds jack laminating machine), CN101830075 (jack hydraulic press), CN102189700A (jack hydraulic press) and CN102632630A (jack hydraulic press), etc.

Operator scheme is that the alternative of mode of operation is the importance that jack hydraulic press embodies human oriented design, is also a key factor that embodies to greatest extent operating flexibility.The alternative of so-called operator scheme refers to and is able between manual operation and foot-operated operation, be complied with and needed to select flexibly by user." Manual Dual-Use Pneumatic Presses " that Chinese patent CN201333809Y recommends can meet the requirement that operator selects between manual operation and operated by foot, but, complex structure and troublesome poeration are its shortcoming, specifically can be capable referring to the Instructions Page 3 3-9 of this patent.In addition, due to two gas motors need be set on valve body (patent claims the pump housing), thereby be not jack hydraulic press truly, but Pneumatic-hydraulic forcing press category.

In sum, in the patent scheme of the jack hydraulic press exemplifying on be not limited to, be showed no all not only can manual operation but also can the enlightenment of operated by foot technology.

For above-mentioned prior art, the applicant has done useful design, has finally formed technical scheme described below, and is taking the laboratory the applicant under secrecy provision to carry out simulated test, and it is practicable that result proves.

Summary of the invention

Task of the present invention be to provide a kind of not only can manual operation but also can operated by foot and use and meet user and select flexibly the jack hydraulic press requiring.

Task of the present invention completes like this, a kind of jack hydraulic press, comprising: by upper and lower crossbeam, be connected to first, second trailing arm between upper and lower crossbeam and parallel and and the frame that forms of first, second trailing arm work rest that be connected and between upper and lower crossbeam, one is arranged on the operating cylinder on described entablature movably, one is arranged on hydraulic power unit on described the first trailing arm and that be connected with described operating cylinder hydraulic oil pipe pipeline, one be connected with hydraulic power unit for ordering about the operating mechanism of hydraulic power unit to described working oil cylinder pump oil, wherein: described hydraulic power unit comprises valve body, the pump housing and oil storage tank, valve body is arranged on the side of described the first trailing arm back to described the second trailing arm, the pump housing matches with valve body, oil storage tank is connected with valve body, be characterised in that: described operating mechanism comprises presses hand seat, press hand, the foot-operated arm of stepping on, pull bar and pull bar return spring, one end and the described valve body of pressing hand seat are hinged, middle part and the described pump housing of pressing hand seat are hinged, and press the other end of hand seat and the upper end of pull bar hinged, the lower end of pull bar is with foot-operated to step on arm hinged, foot-operated one end and the first trailing arm of stepping on arm is hinged, and the other end is configured to free end and formation has a riding boogie board, press hand and press hand seat plug and coordinate, the upper end of pull bar return spring is fixed on the first trailing arm, and lower end is fixed on pull bar.

In a specific embodiment of the present invention, described one end of pressing hand seat by bearing pin with to press the hinged ear of hand hinged, and this is pressed the hinged ear of hand and is fixed on the valve body of described hydraulic power unit, the upper end that connection bearing pin and connecting rod are passed through in described middle part of pressing hand seat is hinged, and the lower end of connecting rod is hinged by pitman pin and the described pump housing, the described other end of pressing hand seat is hinged by the upper end of connecting pin and described pull bar, and the lower end of this pull bar is by pull bar bearing pin and described foot-operated to step on arm hinged, arm bearing pin is stepped on and described the first trailing arm is hinged by foot-operated in described foot-operated one end of stepping on arm.

In another specific embodiment of the present invention, on described valve body, be provided with oil suction road, large pump oil suction road, little pump oil suction road, large pump turnover oil duct, little pump turnover oil duct, fuel-displaced oil duct, operating cylinder back oil road, little pump superpressure draining road, back oil road, pump housing chamber, large oil pump outlet valve, little oil pump outlet valve, oil return control valve, speed speed control valve, pressure regulator valve, large pump oil sucting valve and little pump oil sucting valve, oil suction road is positioned at the bottom of the short transverse of valve body, large pump oil suction road and little pump oil suction road communicate with oil suction road, large pump turnover oil duct communicates with pump housing chamber, and communicate with large pump oil sucting valve and speed speed control valve, one end of little pump turnover oil duct communicates with pump housing chamber, the other end communicates with little pump oil sucting valve, one end of fuel-displaced oil duct communicates with large oil pump outlet valve, the other end communicates with little oil pump outlet valve, one end of operating cylinder back oil road communicates with fuel-displaced oil duct, the other end is communicating with back oil road after oil return control valve, the one end in little pump superpressure draining road communicates with pump housing chamber, the other end is communicating with back oil road after pressure regulator valve, back oil road is positioned at the lower right side of valve body, and communicate with described oil storage tank, pump housing chamber is formed in the right upper portion of valve body, this pump housing chamber is made up of jointly large pump plunger shaft chamber and little pump plunger shaft chamber, and little pump plunger shaft chamber is formed in the bottom in large pump plunger shaft chamber with narrow contracting state, on the chamber wall in large pump plunger shaft chamber, offer a large pump plunger shaft chamber turnover oilhole, this large pump plunger shaft chamber turnover oilhole communicates with described large pump turnover oil duct, on the chamber wall in little pump plunger shaft chamber, offer little pump plunger shaft chamber turnover oilhole and a superpressure draining hole, little pump plunger shaft chamber, turnover oilhole in little pump plunger shaft chamber communicates with described little pump turnover oil duct, and superpressure draining hole, little pump plunger shaft chamber communicates with described little pump superpressure draining road, large oil pump outlet valve and little oil pump outlet valve with each other longitudinally parallel state be arranged on the left upper portion of valve body, wherein, little oil pump outlet valve is corresponding to the rear side of large oil pump outlet valve, large pump oil sucting valve and little pump oil sucting valve with each other longitudinally parallel state be arranged on the bottom, left side of valve body, and large pump oil sucting valve is corresponding to the below of large oil pump outlet valve, and little pump oil sucting valve is corresponding to the below of little oil pump outlet valve, oil return control valve is arranged on the front side of valve body, and corresponding to the position, boundary of described operating cylinder back oil road and back oil road, speed speed control valve is being arranged on the right side of valve body corresponding to the position between large pump turnover oil duct and back oil road, pressure regulator valve is arranged on the passage in described little pump superpressure draining road, in the bottom of valve body and be positioned at middle position and form and have an oil storage tank matching seat that protrudes from the basal surface of valve body, on this oil storage tank matching seat, connect a fuel sucking pipe, the upper end of this fuel sucking pipe has a fuel sucking pipe screw terminals, this fuel sucking pipe screw terminals is threaded with oil storage tank matching seat in the position corresponding to described oil suction road, the lower end of fuel sucking pipe is stretched in oil storage tank, wherein: on fuel sucking pipe screw terminals and the position that is positioned at the axial central authorities of fuel sucking pipe screw terminals form and have a joint oilhole, this joint oilhole communicates with the oil suction tube chamber of fuel sucking pipe and communicates with described oil suction road simultaneously, the described pump housing matches with described pump housing chamber, this pump housing is by jointly forming at large pump plunger shaft and little pump plunger shaft, little pump plunger shaft is directly formed in the bottom of large pump plunger shaft with narrow contracting state, large pump plunger shaft slides up and down and coordinates with described large pump plunger shaft chamber, little pump plunger shaft slides up and down and coordinates with described little pump plunger shaft chamber, the lower end of described connecting rod is hinged by the upper end of described pitman pin and described large pump plunger shaft, on described valve body and be equipped with a fuel-displaced swivel nut corresponding to the position of described large oil pump outlet valve, this fuel-displaced swivel nut communicates with large oil pump outlet valve, described operating cylinder is connected with fuel-displaced swivel nut by operating cylinder hydraulic oil pipe, and communicate with described joint oilhole through fuel-displaced swivel nut, on described the first trailing arm and be fixed with one corresponding to the position of described valve body for valve body being covered to the valve body guard shield protecting.

In another specific embodiment of the present invention, on described valve body guard shield and offering one corresponding to described position of pressing hand seat, press the hand chamber of stepping down, and offering the oil return control valve knob chamber of stepping down corresponding to the position of described oil return control valve, and offering the speed speed control valve knob chamber of stepping down corresponding to the position of described speed speed control valve.

In another specific embodiment of the present invention, on the end face of the upper end of described large pump plunger shaft and be positioned at middle position form have a diameter to be less than the connecting rod connector of the diameter of large pump plunger shaft, on this connecting rod connector, offer a link pin axis hole, described connecting rod is hinged by described pitman pin and this link pin axis hole.

Also have in a specific embodiment of the present invention, described large oil pump outlet valve is included in large oil pump outlet valve chamber, large oil pump outlet valve steel ball and large oil pump outlet valve spring, large oil pump outlet valve chamber is opened on described valve body, and be positioned at the top in the left side of valve body, on the chamber wall in this large oil pump outlet valve chamber and be positioned at chamber wall top form have fuel-displaced swivel nut to connect internal thread, described fuel-displaced swivel nut connects internal thread with this fuel-displaced swivel nut and is threaded, and communicate with large oil pump outlet valve chamber, large oil pump outlet valve steel ball is arranged on the bottom in large oil pump outlet valve chamber, large oil pump outlet valve spring is arranged in large oil pump outlet valve chamber, the upper end of this large oil pump outlet valve spring is bearing on fuel-displaced swivel nut, lower end is bearing on large oil pump outlet valve steel ball, described fuel-displaced oil duct communicates with large oil pump outlet valve chamber, described little oil pump outlet valve comprises little oil pump outlet valve chamber, little oil pump outlet valve steel ball and little oil pump outlet valve spring, little oil pump outlet valve chamber is to be opened on valve body with the longitudinal parallel state in described large oil pump outlet valve chamber, and corresponding to the rear side in large oil pump outlet valve chamber, on the chamber wall in this little oil pump outlet valve chamber and be positioned at chamber wall top form have little oil pump outlet valve chamber seal plug to connect internal thread, connect a little oil pump outlet valve chamber seal plug at the position that connects internal thread corresponding to this little oil pump outlet valve chamber seal plug with screw thread docked mode, little oil pump outlet valve steel ball is arranged on the bottom in little oil pump outlet valve chamber, little oil pump outlet valve spring is arranged in little oil pump outlet valve chamber, the upper support of this little oil pump outlet valve spring is on the seal plug of little oil pump outlet valve chamber, lower end is bearing on little oil pump outlet valve steel ball, described fuel-displaced oil duct communicates with little oil pump outlet valve chamber.

More of the present invention and in a specific embodiment, described oil return control valve comprises oil return control valve pocket, oil return control valve steel ball, oil return control valve swivel nut and oil return control valve valve knob, oil return control valve pocket is opened on described valve body at the position, boundary corresponding to described operating cylinder back oil road and described back oil road, oil return control valve steel ball is arranged in oil return control valve pocket, and between operating cylinder back oil road and back oil road, oil return control valve swivel nut be formed in control valve swivel nut on the chamber wall of oil return control valve pocket and connect internal thread screw thread and connect, oil return control valve knob and oil return control valve swivel nut threaded engagement, and this oil return control valve knob contacts with oil return control valve steel ball towards one end of oil return control valve steel ball, and oil return control valve knob is stretched over outside oil return control valve swivel nut away from one end of oil return control valve steel ball, and and then lean out the side, front side of valve body, described pressure regulator valve comprises pressure regulation valve pocket, pressure regulator valve steel ball, pressure regulator valve spring, pressure regulating screw and pressure regulator valve blind nut, pressure regulation valve pocket is being opened on described valve body corresponding to the position, boundary of described little pump superpressure draining road and back oil road, pressure regulator valve steel ball is arranged in pressure regulation valve pocket, one end of pressure regulator valve spring is bearing on pressure regulator valve steel ball, the other end is bearing on pressure regulating screw, adjust screw and the pressure regulation valve pocket internal thread threaded engagement being formed on the chamber wall of pressure regulation valve pocket, pressure regulator valve blind nut is corresponding to afterbody and same and the pressure regulation valve pocket internal thread threaded engagement of pressure regulating screw, pressure regulating screw is covered and protected.

In of the present invention and then a specific embodiment, described speed speed control valve comprises speed speed control valve pocket processed, speed speed control valve steel ball, speed speed control valve swivel nut and speed speed control valve knob, speed speed control valve pocket processed is being opened on described valve body corresponding to the position between described large pump turnover oil duct and back oil road, speed speed control valve steel ball is arranged in speed speed control valve pocket processed, speed speed control valve swivel nut be formed in swivel nut on the chamber wall of speed speed control valve pocket processed and connect internal thread and connect, speed speed control handle and speed speed control valve swivel nut threaded engagement, and this speed speed control valve knob contacts with speed speed control valve steel ball towards one end of speed speed control valve steel ball, and speed speed control valve knob is stretched over outside speed speed control valve swivel nut away from one end of speed speed control valve steel ball, and and then lean out the side, right side of valve body.

Of the present invention again more and in a specific embodiment, described large pump oil sucting valve comprises large pump oil suction valve pocket, large pump oil sucting valve steel ball and large pump oil sucting valve spring, large pump oil suction valve pocket is being opened on described valve body corresponding to the position below described large oil pump outlet valve, large pump oil sucting valve steel ball is arranged on the bottom of large pump oil suction valve pocket, the upper end of large pump oil sucting valve spring is bearing in the top of large pump oil suction valve pocket, and lower end is supported on large pump oil sucting valve steel ball, described large pump oil suction road communicates with large pump oil suction valve pocket; Described little pump oil sucting valve comprises little pump oil suction valve pocket, little pump oil sucting valve steel ball and little pump oil sucting valve spring; little pump oil suction valve pocket is being opened on valve body corresponding to the position below described little oil pump outlet valve; this little pump oil suction valve pocket and described large pump oil suction valve pocket are longitudinally parallel; and corresponding to the rear side of large pump oil suction valve pocket; little pump oil sucting valve steel ball is arranged on the bottom of little pump oil suction valve pocket; the upper end of little pump oil sucting valve spring is bearing in the top of little pump oil suction valve pocket; and lower end is bearing on little pump oil sucting valve steel ball, and described oil suction road communicates with little pump oil suction valve pocket.

In again of the present invention and then a specific embodiment, on the chamber wall in described large pump plunger shaft chamber, be embedded with large pump plunger shaft sealing ring, and on the chamber wall in described little pump plunger shaft chamber, be embedded with little pump plunger shaft sealing ring, described large pump plunger shaft is sealed and matched with large pump plunger shaft sealing ring, and described little pump plunger shaft and little pump plunger shaft sealing ring are sealed and matched.

Because technical scheme provided by the invention both can also can be stepped on the pump housing operation of arm to hydraulic power unit by foot-operated by pressing hand, thereby have selective flexibly.

Brief description of the drawings

Fig. 1 is embodiments of the invention structure chart.

Fig. 2 is the detailed structure view that the operating mechanism shown in Fig. 1 is connected with the pump housing of Hydraulic Station.

Fig. 3 is the detailed structure view of the valve body shown in Fig. 1 and Fig. 2.

Fig. 4 is the first embodiment schematic diagram of the hydraulic circuit of Fig. 3.

Fig. 5 is the second embodiment schematic diagram of the hydraulic circuit of Fig. 3.

Detailed description of the invention

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, applicant elaborates the mode with embodiment below, but be not all the restriction to the present invention program to the description of embodiment, any done according to the present invention design only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.

The concept of every directionality that relates to upper and lower, left and right, front and rear (or claiming directionality) is all for the residing location status of figure being described in the following description, object is to facilitate public understanding, thereby can not be understood as being particularly limited technical scheme provided by the invention.

Embodiment 1:

Refer to Fig. 1, this Fig. 1 has provided a frame 1, this frame 1 is by entablature crossbeam 11, sill 12, the first trailing arm 13, the second trailing arm 14 and work rest 15 form, on, sill 11, 12 self correspondence, the upper end of the first trailing arm 13 is fixedly connected with the right-hand member of entablature 11, and the lower end of the first trailing arm 13 is fixedly connected with the right-hand member of sill 12, the upper end of the second trailing arm 14 is fixedly connected with the left end of entablature 11, and the lower end of the second trailing arm 14 is fixedly connected with the left end of sill 12, thereby by upper, sill 11, 12 and each other longitudinally parallel first, the second trailing arm 13, frame 1 is formed a structure that is similar to " mouth " font of Chinese character by 14, work rest 15 is connected to first, the second trailing arm 13, between 14, and can be first, the second trailing arm 13, on 14, make up-down adjustment, use requirement for height required while meeting operation.Suppose that work rest 15 is positioned at the middle position of the short transverse of first, second trailing arm 13,14, frame 1 is just the structure of " saying " font of Chinese character so.On aforementioned entablature 11, be provided with an operating cylinder 2, this operating cylinder 2 can move left and right on entablature 11.And the operating cylinder post 22 of this operating cylinder 2 towards under, be opposite to the workpiece effect on work rest 15 by it.Preferred scheme also can arrange one for disclosing the Pressure gauge 111 of pressure of operating cylinder 2 on aforementioned entablature 11.

Because the frame 1 of aforementioned structure form belongs to prior art, for example can be referring to Chinese patent ZL20101010181945.X (jack hydraulic press), ZL201110077547.8 (jack hydraulic press) and ZL201220188858.1 (jack hydraulic press), etc., thereby applicant repeats no more.

Provide a hydraulic power unit 3, this hydraulic power unit 3 has been arranged on the first trailing arm 13, but also can be arranged on the second trailing arm 14, this hydraulic power unit 3 is connected with aforesaid operating cylinder 2 hydraulic oil pipe pipelines, that is to say that operating cylinder 2 is connected with these hydraulic power unit 3 hydraulic oil pipe pipelines.Provide one for operating mechanism 4 that operate to hydraulic power unit 3 and that be connected with hydraulic power unit 3, ordered about hydraulic power unit 3 by this operating mechanism 4 and work, realized to aforementioned operating cylinder 2 pump oil.

Aforesaid hydraulic power unit 3 comprises valve body 31, the pump housing 32 and oil storage tank 33, valve body 31 is by offering valve body fixing threaded hole 311l (Fig. 3 shows) on it and fixing with screw and aforementioned the first trailing arm 13, more precisely valve body 31 and the first trailing arm 13 are fixed back to a side of the second trailing arm 14, fix with the right side of the first trailing arm 13, and be preferably placed at the middle part of the short transverse of the first trailing arm 13.The pump housing 32 coordinates with valve body 31, and oil storage tank 33 is fixedly connected with the bottom of valve body 31.

Ask for an interview Fig. 2 and in conjunction with Fig. 1, as technical essential provided by the invention, aforesaid operating mechanism 4 comprises presses hand seat 41, press hand 42, the foot-operated arm 43 of stepping on, pull bar 44 and pull bar return spring 45, the one end of pressing hand seat 41 is that right-hand member and the aforementioned valve body 31 of shown position state is articulated and connected, middle part and the aforementioned pump housing 32 of pressing hand seat 41 are articulated and connected, and being the left end of shown position state and the upper end of pull bar 44, the other end of pressing hand seat 41 is articulated and connected, the lower end of pull bar 44 is stepped on arm 43 and is articulated and connected with foot-operated, foot-operated one end (right-hand member) of stepping on arm 43 is connected with the lower hinge of the first trailing arm 13, and the left side that the foot-operated other end of stepping on arm 43 is shown position state is configured to free end and formation has a riding boogie board 431 of trampling for confession operator's pin, press hand 42 and press hand seat 41 plug and coordinate, particularly, in the time wanting manual operation, to press hand 42 insertions and press hand seat 41, otherwise with example.Pull bar return spring 45 also can be called pull bar back-moving spring, and the upper end of this pull bar return spring 45 is fixed in the extension spring fixing feet 132 being formed on the first trailing arm 13, and lower end is fixed with the spring steady pin 442 being arranged on pull bar 44.As shown in Figure 1, aforesaid pull bar 44 has longitudinally walk abreast each other a pair of.

As preferred scheme, aforementioned one end (right-hand member) of pressing hand seat 41 by bearing pin 411 with to press the hinged ear 412 of hand hinged, and press on the preferred valve body 31 that is fixed on hydraulic power unit 3 with welding manner of the hinged ear 412 of hand (can refer to Fig. 2 and Fig. 3), the middle part of pressing hand seat 41 is hinged with the upper end of connecting rod 414 (two pieces) by connecting bearing pin 413, and the lower end of connecting rod 414 is hinged by pitman pin 4141 and the pump housing 32, it is hinged with the upper end of pull bar 44 that the other end of pressing hand seat 41 is that left end passes through connecting pin 415, and the lower end of pull bar 44 by pull bar bearing pin 441 with aforesaid foot-operated to step on arm 43 hinged, foot-operated one end (diagram right-hand member) of stepping on arm 43 is by the foot-operated lower hinge of stepping on arm bearing pin 432 and the first trailing arm 13.

The structural system of above-mentioned operating mechanism 4 can meet user in the requirement of carrying out selecting flexibly with hand or between with pin operation.

Refer to Fig. 3 and Fig. 4, applicant is described in detail the structural system of aforementioned valve body 31, on valve body 31, be provided with oil suction road 311a, large pump oil suction road 311b, little pump oil suction road 311c, large pump turnover oil duct 311d, little pump turnover oil duct 311e, fuel-displaced oil duct 311f, operating cylinder back oil road 311g, little pump superpressure draining road 311h, back oil road 311i, pump housing chamber 312, large oil pump outlet valve 313, little oil pump outlet valve 314, oil return control valve 315, speed speed control valve 316, pressure regulator valve 317, large pump oil sucting valve 318 and little pump oil sucting valve 319, oil suction road 311a is positioned at the bottom of the short transverse of valve body 31, large pump oil suction road 311b and little pump oil suction road 311c communicate with oil suction road 311a, large pump turnover oil duct 311d communicates with pump housing chamber 312, and communicate with large pump oil sucting valve 318 and speed speed control valve 316, one end of little pump turnover oil duct 311e communicates with pump housing chamber 312, the other end communicates with little pump oil sucting valve 319, one end of fuel-displaced oil duct 311f communicates with large oil pump outlet valve 313, the other end communicates with little oil pump outlet valve 314, one end of operating cylinder back oil road 311g communicates with fuel-displaced oil duct 311f, the other end is communicating with back oil road 311i after oil return control valve 315, one end of little pump superpressure draining road 311h communicates with pump housing chamber 312, the other end is communicating with back oil road 311i after pressure regulator valve 317, back oil road 311i is positioned at the lower right side of valve body 31, and communicate with aforementioned oil storage tank 33, pump housing chamber 312 is formed in the right upper portion of valve body 31, this pump housing chamber 312 is made up of jointly large pump plunger shaft chamber 3121 and little pump plunger shaft chamber 3122, and little pump plunger shaft chamber 3122 is formed in the bottom in large pump plunger shaft chamber 3121 with narrow contracting state, on the chamber wall in large pump plunger shaft chamber 3121, offer a large pump plunger shaft chamber turnover oilhole 31211, this large pump plunger shaft chamber turnover oilhole 31211 communicates with aforementioned large pump turnover oil duct 311d, on the chamber wall in little pump plunger shaft chamber 3122, offer little pump plunger shaft chamber turnover oilhole 31221 and a superpressure draining hole, little pump plunger shaft chamber 31222, turnover oilhole 31221 in little pump plunger shaft chamber communicates with aforementioned little pump turnover oil duct 311e, and superpressure draining hole 31222, little pump plunger shaft chamber communicates with aforementioned little pump superpressure draining road 311h, large oil pump outlet valve 313 and little oil pump outlet valve 314 with each other longitudinally parallel state be arranged on the left upper portion of valve body 31, wherein, little oil pump outlet valve 314 is corresponding to the rear side of large oil pump outlet valve 313, large pump oil sucting valve 318 and little pump oil sucting valve 319 with each other longitudinally parallel state be arranged on the bottom, left side of valve body 31, and large pump oil sucting valve 318 is corresponding to the below of large oil pump outlet valve 313, and little pump oil sucting valve 319 is corresponding to the below of little oil pump outlet valve 314, oil return control valve 315 is arranged on the front side of valve body 31, and corresponding to the position, boundary of operating cylinder back oil road 311g and back oil road 311i, speed speed control valve 316 is being arranged on the right side of valve body 31 corresponding to the position between large pump turnover oil duct 311d and back oil road 311i, pressure regulator valve 317 is arranged on the passage of little pump superpressure draining road 311h, in the bottom of valve body 31 and be positioned at middle position and form and have an oil storage tank matching seat 311j who protrudes from the basal surface of valve body 31, on this oil storage tank matching seat 311j, connect a fuel sucking pipe 5, the upper end of this fuel sucking pipe 5 has a fuel sucking pipe screw terminals 51, this fuel sucking pipe screw terminals 51 is threaded with oil storage tank matching seat 311j in the position corresponding to aforementioned oil suction road 311a, the lower end of fuel sucking pipe 5 is stretched in oil storage tank 33, wherein: on fuel sucking pipe screw terminals 51 and the position that is positioned at the axial central authorities of fuel sucking pipe screw terminals 51 form and have a joint oilhole 511, this joint oilhole 511 communicates with the oil suction tube chamber of fuel sucking pipe 5 and communicates with aforementioned oil suction road 311a simultaneously, the aforementioned pump housing 32 matches with pump housing chamber 312, this pump housing 32 is by jointly forming at large pump plunger shaft 321 and little pump plunger shaft 322, little pump plunger shaft 322 is directly formed in the bottom of large pump plunger shaft 321 with narrow contracting state, large pump plunger shaft 321 slides up and down and coordinates with aforementioned large pump plunger shaft chamber 3121, little pump plunger shaft 322 slides up and down and coordinates with aforementioned little pump plunger shaft chamber 3122, the lower end of aforementioned connecting rod 414 is hinged with the upper end of aforementioned large pump plunger shaft 321 by pitman pin 4141, on valve body 31 and be equipped with a fuel-displaced swivel nut 311k corresponding to the position of aforementioned large oil pump outlet valve 313, this fuel-displaced swivel nut 311k communicates with large oil pump outlet valve 313, aforementioned operating cylinder 2 is connected with fuel-displaced swivel nut 311k by operating cylinder hydraulic oil pipe 21, and communicate with aforementioned joint oilhole 511 through fuel-displaced swivel nut 311k, on aforementioned the first trailing arm 13 and be fixed with one corresponding to the position of valve body 31 for valve body 31 being covered to the valve body guard shield 131 protecting.

Preferably, aforementioned oil storage tank 33 is fixed by the oil storage tank matching seat 311j of tight loop 331 (Fig. 2 shows) and aforementioned valve body 31, and is provided with an oil storage tank sealing ring 332 (Fig. 2 shows) between the inwall of oil storage tank 33 and oil storage tank matching seat 311j.Signal according to Fig. 3 is known, and owing to forming and having an oil storage tank sealing ring caulking groove 311m on oil storage tank matching seat 311j and around the circumferencial direction of oil storage tank matching seat 311j, thereby oil storage tank sealing ring 332 is embedded in this oil storage tank sealing ring caulking groove 311m.

In Fig. 3, also show the little pump for the oil duct endcapped to little pump oil suction road 311c being positioned on valve body 31 and inhale oil path jam screw 311n, for the back oil road plug screw 311p of the oil duct endcapped to operating cylinder back oil road 311g, for the plug screw 311q of the endcapped to little pump turnover oil duct 311e, and for the plug 311r of the endcapped to oil suction road 311a.

As shown in Figure 1, on aforementioned valve body guard shield 131 and offering one corresponding to aforementioned position of pressing hand seat 41, press the hand chamber 1311 of stepping down, and offering the oil return control valve knob chamber 1312 of stepping down corresponding to the position of aforementioned oil return control valve 315, and offering the speed speed control valve knob chamber 1313 of stepping down corresponding to the position of described speed speed control valve 316.

As shown in Figure 3, on the end face of the upper end of aforementioned large pump plunger shaft 321 and be positioned at middle position form have a diameter to be less than the connecting rod connector 3211 of the diameter of large pump plunger shaft 321, on this connecting rod connector 3211, offer a link pin axis hole 32111, aforesaid connecting rod 414 by pitman pin 4141 corresponding to hinged with position and the connecting rod connector 3211 of this link pin axis hole 32111, thereby realized the hinged of large pump plunger shaft 321.

Continue to see Fig. 3 and Fig. 4, aforesaid large oil pump outlet valve 313 is included in large oil pump outlet valve chamber 3131, large oil pump outlet valve steel ball 3132 and large oil pump outlet valve spring 3133, large oil pump outlet valve chamber 3131 is opened on aforementioned valve body 31, and be positioned at the top in the left side of valve body 31, on the chamber wall in this large oil pump outlet valve chamber 3131 and be positioned at chamber wall top form have fuel-displaced swivel nut to connect internal thread 31311, aforementioned fuel-displaced swivel nut 311k connects internal thread 31311 with this fuel-displaced swivel nut and is threaded, and communicate with large oil pump outlet valve chamber 3131, large oil pump outlet valve steel ball 3132 is arranged on the bottom in large oil pump outlet valve chamber 3131, large oil pump outlet valve spring 3133 is arranged in large oil pump outlet valve chamber 3131, the upper end of this large oil pump outlet valve spring 3133 is bearing on fuel-displaced swivel nut 311k, lower end is bearing on large oil pump outlet valve steel ball 3132, aforementioned fuel-displaced oil duct 311f communicates with large oil pump outlet valve chamber 3131.

Aforesaid little oil pump outlet valve 314 comprises little oil pump outlet valve chamber 3141, little oil pump outlet valve steel ball 3142 and little oil pump outlet valve spring 3143, little oil pump outlet valve chamber 3141 is to be opened on valve body 31 with the longitudinal parallel state in aforementioned large oil pump outlet valve chamber 3131, and corresponding to the rear side in large oil pump outlet valve chamber 3131, on the chamber wall in this little oil pump outlet valve chamber 3141 and be positioned at chamber wall top form have little oil pump outlet valve chamber seal plug to connect internal thread 31411, connect a little oil pump outlet valve chamber seal plug 3144 at the position that connects internal thread 31411 corresponding to this little oil pump outlet valve chamber seal plug with screw thread docked mode, little oil pump outlet valve steel ball 3142 is arranged on the bottom in little oil pump outlet valve chamber 3141, little oil pump outlet valve spring 3143 is arranged in little oil pump outlet valve chamber 3141, the upper support of this little oil pump outlet valve spring 3143 is on little oil pump outlet valve chamber seal plug 3144, lower end is bearing on little oil pump outlet valve steel ball 3142, aforementioned fuel-displaced oil duct 311f communicates with little oil pump outlet valve chamber 3141.

Aforesaid oil return control valve 315 comprises oil return control valve pocket 3151, oil return control valve steel ball 3152, oil return control valve swivel nut 3153 and oil return control valve valve knob 3154, oil return control valve pocket 3151 is being opened on valve body 31 corresponding to the position, boundary of aforementioned operating cylinder back oil road 311g and back oil road 311i, oil return control valve steel ball 3152 is arranged in oil return control valve pocket 3151, and between operating cylinder back oil road 311g and back oil road 311i, oil return control valve swivel nut 3153 be formed in control valve swivel nut on the chamber wall of oil return control valve pocket 3151 and connect internal thread 31511 screw threads and connect, oil return control valve knob 3154 and oil return control valve swivel nut 3153 threaded engagement, and this oil return control valve knob 3154 contacts with oil return control valve steel ball 3152 towards one end of oil return control valve steel ball 3152, and oil return control valve knob 3154 is stretched over outside oil return control valve swivel nut 3153 away from one end of oil return control valve steel ball 3152, and and then lean out the side, front side of valve body 31.

Aforementioned pressure regulator valve 317 comprises pressure regulation valve pocket 3171, pressure regulator valve steel ball 3172, pressure regulator valve spring 3173, pressure regulating screw 3174 and pressure regulator valve blind nut 3175, pressure regulation valve pocket 3171 is being opened on valve body 31 corresponding to the position, boundary of aforementioned little pump superpressure draining road 311h and back oil road 311i, pressure regulator valve steel ball 3172 is arranged in pressure regulation valve pocket 3171, one end of pressure regulator valve spring 3173 is bearing on pressure regulator valve steel ball 3172, the other end is bearing on pressure regulating screw 3174, adjust screw 3174 and pressure regulation valve pocket internal thread 31711 threaded engagement that are formed on the chamber wall of pressure regulation valve pocket 3171, pressure regulator valve blind nut 3175 is corresponding to afterbody and same and pressure regulation valve pocket internal thread 31711 threaded engagement of pressure regulating screw 3174, pressure regulating screw 3174 is covered and protected.

As preferred scheme, a pressure regulator valve spring base 31741 can be set on pressure regulating screw 3174, the other end of aforementioned pressure regulator valve spring 3173 is bearing on this pressure regulator valve spring base 31741.

Aforementioned speed speed control valve 316 comprises speed speed control valve pocket 3161 processed, speed speed control valve steel ball 3162, speed speed control valve swivel nut 3163 and speed speed control valve knob 3164, speed speed control valve pocket 3161 processed is being opened on aforementioned valve body 31 corresponding to the position between aforementioned large pump turnover oil duct 311d and back oil road 311i, speed speed control valve steel ball 3162 is arranged in speed speed control valve pocket 3161 processed, speed speed control valve swivel nut 3163 be formed in swivel nut on the chamber wall of speed speed control valve pocket 3161 processed and connect internal thread 31611 and connect, speed speed control handle 3164 matches with speed speed control valve swivel nut 3163 screw threads, and this speed speed control valve knob 3164 contacts with speed speed control valve steel ball 3162 towards one end of speed speed control valve steel ball 3162, and speed speed control valve knob 3164 is stretched over outside speed speed control valve swivel nut 3163 away from one end of speed speed control valve steel ball 3162, and and then lean out the side, right side of valve body 31.On speed speed control valve knob 3164, be also provided with knob sealing ring 31641, aforementioned oil return control valve knob 3154 is with example.

Aforementioned large pump oil sucting valve 318 comprises large pump oil suction valve pocket 3181, large pump oil sucting valve steel ball 3182 and large pump oil sucting valve spring 3183, large pump oil suction valve pocket 3181 is being opened on valve body 31 corresponding to the position below aforementioned large oil pump outlet valve 313, large pump oil sucting valve steel ball 3182 is arranged on the bottom of large pump oil suction valve pocket 3181, the upper end of large pump oil sucting valve spring 3183 is bearing in the top of large pump oil suction valve pocket 3181, and lower end is supported on large pump oil sucting valve steel ball 3182, aforementioned large pump oil suction road 311b communicates with large pump oil suction valve pocket 3181.

Aforesaid little pump oil sucting valve 319 comprises little pump oil suction valve pocket 3191, little pump oil sucting valve steel ball 3192 and little pump oil sucting valve spring 3193, little pump oil suction valve pocket 3191 is being opened on valve body 31 corresponding to the position below aforementioned little oil pump outlet valve 314, this little pump oil suction valve pocket 3191 is longitudinally parallel with aforementioned large pump oil suction valve pocket 3181, and corresponding to the rear side of large pump oil suction valve pocket 3181, little pump oil sucting valve steel ball 3192 is arranged on the bottom of little pump oil suction valve pocket 3191, the upper end of little pump oil sucting valve spring 3193 is bearing in the top of little pump oil suction valve pocket 3191, and lower end is bearing on little pump oil sucting valve steel ball 3192, aforementioned oil suction road 311c communicates with little pump oil suction valve pocket 3191.

On the chamber wall in aforementioned large pump plunger shaft chamber 3121, be embedded with large pump plunger shaft sealing ring 31212, and on the chamber wall in aforementioned little pump plunger shaft chamber 3122, be embedded with little pump plunger shaft sealing ring 31223, aforementioned large pump plunger shaft 321 is sealed and matched with large pump plunger shaft sealing ring 31212, and aforementioned little pump plunger shaft 322 is sealed and matched with little pump plunger shaft sealing ring 31223.

In conjunction with Fig. 1 and Fig. 3, aforesaid oil return control valve knob 3154 is corresponding to the chamber 1312 of stepping down of the oil return control valve knob on valve body guard shield 131, and being stretched over oil return control valve knob steps down outside chamber 1312, so that holding easily, operator pinches operation, same reason, aforesaid speed speed control valve knob 3164 is corresponding to step down chamber 1313 and lean out the speed speed control valve knob chamber 1313 of stepping down of the speed speed control valve knob on valve body guard shield 131, to hold easily and pinch operation for operator.In addition, for valve body guard shield 131 is covered and protected valve body 31 reliably, thereby with screw 1314, valve body guard shield 131 is fixing with valve body 31.(Fig. 2 shows).

Applicant describes operation principle of the present invention in conjunction with Fig. 1 to Fig. 4, when when hand 42 is pressed in actuating by turns under on hand, just can make hydraulic power unit 3 work, by operating cylinder fluid pressure line 21 to operating cylinder 2 pump oil, the operating cylinder post 22 of operating cylinder 2 is stretched outside cylinder body, towards the direction motion of work rest 15, be opposite to the workpiece effect on the mould 151 of work rest 15 by operating cylinder post 22.Concrete principle is as follows:

Operated pressing hand 42 alternately up and down by operator, in this process, in the time that large pump plunger shaft 321 is up together with little pump plunger shaft 322, greatly, little pump plunger shaft chamber 3121, 3122 all in negative pressure state, by fuel sucking pipe 5 to oil storage tank 33 oil suctions, and oil suction road 311a introduced by oil by the joint oilhole 511 by the fuel sucking pipe screw terminals 51 of fuel sucking pipe 5, enter the course that the oil in oil suction road 311a is labeled in the filled arrows " → " on Fig. 4 by applicant and be divided into two-way, one tunnel is successively through large pump oil suction road 311b, the large pump oil suction valve pocket 3181 (large pump oil sucting valve 318 is opened) of large pump oil sucting valve 318, large pump turnover oil duct 311d and large pump plunger shaft chamber turnover oilhole 31211 enter large pump plunger shaft chamber 3121, another road hydraulic oil is successively through little pump oil suction road 311c, the little pump oil suction valve pocket 3191 (little pump oil sucting valve 319 is opened) of little pump oil sucting valve 319, little pump turnover oil duct 311e and little pump plunger shaft chamber turnover oilhole 31221 enter little pump plunger shaft chamber 3122.In the time that large pump plunger shaft 321 is descending together with little pump plunger shaft 322, previously entered into pressure oil in large pump plunger shaft chamber 3121 by applicant be illustrated in Fig. 4 arrow " " course enter successively the operating cylinder chamber 23 (Fig. 4 shows) of operating cylinder 2 through large pump plunger shaft chamber turnover oilhole 31211, large pump turnover oil duct 311d, large oil pump outlet valve 313 (large pump oil sucting valve 318 is now in closed condition), fuel-displaced swivel nut 311k and operating cylinder hydraulic oil pipe 21; operating cylinder post 22 is stretched outside cylinder body, stretches to the direction of aforementioned work rest 15; Meanwhile, previously entered into pressure oil in little pump plunger shaft chamber 3122 and entered through little pump plunger shaft chamber turnover oilhole 31221, little pump turnover oil duct 311e, little oil pump outlet valve 314 (little pump oil sucting valve 319 is now in closed condition), fuel-displaced oil duct 311f, large oil pump outlet valve chamber 3131, fuel-displaced swivel nut 311k and operating cylinder hydraulic oil pipe 21 successively the operating cylinder chamber 23 of operating cylinder 2.

In said process, in the time that pressure increases, that is to say in the time that the end of operating cylinder post 22 contacts with workpiece, by operator, speed speed control valve 316 is operated, speed speed control valve knob 3164 is operated, speed speed control valve steel ball 3162 is opened, the pressure oil that large pump plunger shaft chamber 3121 sucks under this state no longer enters in the operating cylinder chamber 23 of aforementioned operating cylinder 2, back down (unlatching) large oil pump outlet valve 313 because go out the insufficient pressure of the pressure oil in arrogant pump plunger shaft chamber 3121, thereby can only enter back oil road 311i from speed speed control valve pocket 3161 processed, and then introduce in oil storage tank 33, hydraulic oil in little pump plunger shaft chamber 3122 still enters in operating cylinder chamber 23 by aforesaid paths.But, in the time that the hydraulic oil in little pump plunger shaft chamber 3122 exceedes setting value, while having exceeded the force value of being set up by pressure regulator valve 317, so directly enter back oil road 311i by superpressure draining hole, little pump plunger shaft chamber 31222 through little pump superpressure draining road 311h and pressure regulator valve 317, and return in oil storage tank 33, the arrow specifically illustrated by Fig. 4 " " disclose.

After operation completes, that is to say in the time will making operating cylinder 2 release of pressure, open oil return control valve 315, the fluid in aforementioned operating cylinder chamber 23 by applicant be illustrated in arrow in Fig. 4 " " direction successively through operating cylinder hydraulic oil pipe 21, fuel-displaced swivel nut 311k (developing into oil return swivel nut), fuel-displaced oil duct 311f (developing into oil return oil duct), operating cylinder back oil road 311g, oil return control valve 315 and back oil road 311i, until enter oil storage tank 33.

The oil circuit trend of stepping on operation owing to tramping with one's feet is to press with employing the oil circuit that hand 42 operates to move towards identical, thereby applicant repeats no more, and difference is only: aforementioned use is pressed hand 42 and drive by pressing hand seat 41 the connecting rod connector 3211 of large pump plunger shaft 321; The latter is successively through the foot-operated connecting rod connector 3211 of stepping on arm 43, pull bar 44 and driving large pump plunger shaft 321 by pressing hand seat 41.

The structure of above-described hydraulic power unit 3 is for example significantly simple for CN203257773U with respect to prior art, and worthy of the name with jack hydraulic press.

Embodiment 2:

Refer to Fig. 5, in the present embodiment, little pump superpressure draining road 311h is moved to (shown in Fig. 5, state is moved) left towards the direction of operating cylinder back oil road 311g, and little pump superpressure draining road 311h and little pump turnover oil duct 311e are connected, and on valve body 31, offering the little pump superpressure draining road spill port 311s communicating with little pump superpressure draining road 311h, this little pump superpressure draining road spill port 311s communicates with oil storage tank 33.This oil channel structures is with respect to the back oil road 311i while and operating cylinder back oil road 311g of embodiment 1, little pump superpressure draining road 311h and speed speed control valve pocket 3161 processed communicate and become back oil road 311i and only communicate with operating cylinder back oil road 311g and speed speed control valve pocket 3161 processed, little pump superpressure draining road 311h is communicated with oil storage tank 33 by little pump superpressure draining road spill port 311s separately, for the back oil road 311i of embodiment 1, the present embodiment has increased the little pump superpressure draining road spill port 311s that is equivalent to back oil road 311i, there is easily manufactured strong point.All the other are all with the description to embodiment 1.

In sum, technical scheme provided by the invention has overcome the shortcoming in prior art, has successfully completed invention task, has cashed objectively the technique effect referring in the superincumbent technique effect of applicant hurdle.

Claims (10)

1. a jack hydraulic press, comprising: by upper and lower crossbeam (11,12), be connected to first, second trailing arm between upper and lower crossbeam (11,12) and parallel (13,14) and and first, second trailing arm (13,14) be connected and be positioned at the frame (1) that work rest (15) between upper and lower crossbeam (11,12) forms, one is arranged on the operating cylinder (2) on described entablature (11) movably, one is arranged on hydraulic power unit (3) on described the first trailing arm (13) and that be connected with described operating cylinder (2) hydraulic oil pipe pipeline, one be connected with hydraulic power unit (3) for ordering about the operating mechanism (4) of hydraulic power unit (3) to described operating cylinder (2) pump oil, wherein: described hydraulic power unit (3) comprises valve body (31), the pump housing (32) and oil storage tank (33), valve body (31) is arranged on the side of described the first trailing arm (13) back to described the second trailing arm (14), the pump housing (32) matches with valve body (31), oil storage tank (33) is connected with valve body (31), it is characterized in that: described operating mechanism (4) comprises presses hand seat (41), press hand (42), the foot-operated arm (43) of stepping on, pull bar (44) and pull bar return spring (45), one end and the described valve body (31) of pressing hand seat (41) are hinged, middle part and the described pump housing (32) of pressing hand seat (41) are hinged, and press the other end of hand seat (41) and the upper end of pull bar (44) hinged, the lower end of pull bar (44) is with foot-operated to step on arm (43) hinged, foot-operated one end and the first trailing arm (13) of stepping on arm (43) is hinged, and the other end is configured to free end and formation has a riding boogie board (431), press hand (42) and press hand seat (41) plug and coordinate, the upper end of pull bar return spring (45) is fixed on the first trailing arm (13), and lower end is fixed on pull bar (44).

2. jack hydraulic press according to claim 1, the one end of pressing hand seat (41) described in it is characterized in that by bearing pin (411) with to press the hinged ear of hand (412) hinged, and this is pressed on the valve body (31) that the hinged ear of hand (412) is fixed on described hydraulic power unit (3), it is hinged with the upper end of connecting rod (414) that described middle part of pressing hand seat (41) passes through to connect bearing pin (413), and the lower end of connecting rod (414) is hinged by pitman pin (4141) and the described pump housing (32), it is hinged with the upper end of described pull bar (44) that the described other end of pressing hand seat (41) passes through connecting pin (415), and the lower end of this pull bar (44) by pull bar bearing pin (441) with described foot-operated to step on arm (43) hinged, to step on arm bearing pin (432) hinged with described the first trailing arm (13) by foot-operated in described foot-operated one end of stepping on arm (43).

3. jack hydraulic press according to claim 1, it is characterized in that being provided with oil suction road (311a) on described valve body (31), large pump oil suction road (311b), little pump oil suction road (311c), large pump turnover oil duct (311d), little pump turnover oil duct (311e), fuel-displaced oil duct (311f), operating cylinder back oil road (311g), little pump superpressure draining road (311h), back oil road (311i), pump housing chamber (312), large oil pump outlet valve (313), little oil pump outlet valve (314), oil return control valve (315), speed speed control valve (316), pressure regulator valve (317), large pump oil sucting valve (318) and little pump oil sucting valve (319), oil suction road (311a) is positioned at the bottom of the short transverse of valve body (31), large pump oil suction road (311b) and little pump oil suction road (311c) communicate with oil suction road (311a), large pump turnover oil duct (311d) communicates with pump housing chamber (312), and communicate with large pump oil sucting valve (318) and speed speed control valve (316), one end of little pump turnover oil duct (311e) communicates with pump housing chamber (312), the other end communicates with little pump oil sucting valve (319), one end of fuel-displaced oil duct (311f) communicates with large oil pump outlet valve (313), the other end communicates with little oil pump outlet valve (314), one end of operating cylinder back oil road (311g) communicates with fuel-displaced oil duct (311f), the other end is communicating with back oil road (311i) after oil return control valve (315), the one end in little pump superpressure draining road (311h) communicates with pump housing chamber (312), the other end is communicating with back oil road (311i) after pressure regulator valve (317), back oil road (311i) is positioned at the lower right side of valve body (31), and communicate with described oil storage tank (33), pump housing chamber (312) is formed in the right upper portion of valve body (31), this pump housing chamber (312) is made up of jointly large pump plunger shaft chamber (3121) and little pump plunger shaft chamber (3122), and little pump plunger shaft chamber (3122) is formed in the bottom in large pump plunger shaft chamber (3121) with narrow contracting state, on the chamber wall in large pump plunger shaft chamber (3121), offer a large pump plunger shaft chamber turnover oilhole (31211), this large pump plunger shaft chamber turnover oilhole (31211) communicates with described large pump turnover oil duct (311d), on the chamber wall in little pump plunger shaft chamber (3122), offer little pump plunger shaft chamber turnover oilhole (31221) and a superpressure draining hole, little pump plunger shaft chamber (31222), little pump plunger shaft chamber turnover oilhole (31221) communicates with described little pump turnover oil duct (311e), and superpressure draining hole, little pump plunger shaft chamber (31222) communicates with described little pump superpressure draining road (311h), large oil pump outlet valve (313) and little oil pump outlet valve (314) with each other longitudinally parallel state be arranged on the left upper portion of valve body (311), wherein, little oil pump outlet valve (314) is corresponding to the rear side of large oil pump outlet valve (313), large pump oil sucting valve (318) and little pump oil sucting valve (319) with each other longitudinally parallel state be arranged on the bottom, left side of valve body (31), and large pump oil sucting valve (318) is corresponding to the below of large oil pump outlet valve (313), and little pump oil sucting valve (319) is corresponding to the below of little oil pump outlet valve (314), oil return control valve (315) is arranged on the front side of valve body (31), and the position, boundary corresponding to described operating cylinder back oil road (311g) with back oil road (311i), speed speed control valve (316) is being arranged on the right side of valve body (31) corresponding to the position between large pump turnover oil duct (311d) and back oil road (311i), pressure regulator valve (317) is arranged on the passage in described little pump superpressure draining road (311h), in the bottom of valve body (31) and be positioned at middle position and form and have an oil storage tank matching seat (311j) that protrudes from the basal surface of valve body (31), on this oil storage tank matching seat (311j), connect a fuel sucking pipe (5), the upper end of this fuel sucking pipe (5) has a fuel sucking pipe screw terminals (51), this fuel sucking pipe screw terminals (51) is threaded with oil storage tank matching seat (311j) in the position corresponding to described oil suction road (311a), the lower end of fuel sucking pipe (5) is stretched in oil storage tank (33), wherein: position upper at fuel sucking pipe screw terminals (51) and that be positioned at the axial central authorities of fuel sucking pipe screw terminals (51) forms a joint oilhole (511), this joint oilhole (511) communicates with the oil suction tube chamber of fuel sucking pipe (5) and communicates with described oil suction road (311a) simultaneously, the described pump housing (32) matches with described pump housing chamber (312), this pump housing (32) is by jointly forming at large pump plunger shaft (321) and little pump plunger shaft (322), little pump plunger shaft (322) is directly formed in the bottom of large pump plunger shaft (321) with narrow contracting state, large pump plunger shaft (321) slides up and down and coordinates with described large pump plunger shaft chamber (3121), little pump plunger shaft (322) slides up and down and coordinates with described little pump plunger shaft chamber (3122), the lower end of described connecting rod (414) is hinged with the upper end of described large pump plunger shaft (321) by described pitman pin (4141), go up and be equipped with a fuel-displaced swivel nut (311k) corresponding to the position of described large oil pump outlet valve (313) at described valve body (31), this fuel-displaced swivel nut (311k) communicates with large oil pump outlet valve (313), described operating cylinder (2) is connected with fuel-displaced swivel nut (311k) by operating cylinder hydraulic oil pipe (21), and communicate with described joint oilhole (511) through fuel-displaced swivel nut (311k), go up and be fixed with one corresponding to the position of described valve body (31) for valve body (31) being covered to the valve body guard shield (131) protecting at described the first trailing arm (13).

4. jack hydraulic press according to claim 3, it is characterized in that upper at described valve body guard shield (131) and press the hand chamber (1311) of stepping down offering one corresponding to described position of pressing hand seat (41), and offering the oil return control valve knob chamber (1312) of stepping down corresponding to the position of described oil return control valve (315), and offering the speed speed control valve knob chamber (1313) of stepping down corresponding to the position of described speed speed control valve (316).

5. jack hydraulic press according to claim 3, it is characterized in that on the upper end end face of described large pump plunger shaft (321) and be positioned at middle position formation have a diameter to be less than the connecting rod connector (3211) of the diameter of large pump plunger shaft (321), on this connecting rod connector (3211), offer a link pin axis hole (32111), described connecting rod (414) is hinged by described pitman pin (4141) and this link pin axis hole (32111).

6. According to claim 3 jacks, hydraulic press, its characteristics is described in large pumping oil valve (313) is included in the large pumping oil valve cavity (3131), large pump delivery valve ball (3132) and large pumping oil valve spring (3133), large pump delivery valve cavity (3131) opened in the body (31), and is located in the left side of the upper body (31), in the large pump (3131) of the cavity wall of the valve cavity and is located in the upper part of the cavity wall form within the oil with a screw thread (31311), described the oil (311 k) and the oil a screw nut with female threaded connection (31311), and with large pump delivery valve cavity (3131).the big pump delivery valve ball (3132) set up in the big pump delivery valve cavity (3131) to the bottom of the large pumping oil valve spring (3133) set up in the big pump (3131) of the oil valve cavity, the large pumping oil valve spring (3133) of the upper bearing in the oil (311 k), a screw bottom bearing in the pump delivery valve ball (3132), stated out the oil (311 f) and large pump (3131) of the oil valve cavity mutually;Described the small pump delivery valve (314) includes a small pump delivery valve cavity (3141), small pump delivery valve ball (3142) and small pump out the oil valve spring (3143), small pump delivery valve cavity (3141) described with large pumping oil valve cavity (3131) state of vertical parallel to open on the valve body (31), and corresponding to the big pump (3131) of the back of the valve cavity, in the small pump (3141) of the cavity wall of the valve cavity and is located in the upper part of the cavity wall constitute a small pump sealing plug with internal thread of the valve cavity (31411), in the corresponding to the small pump sealing plug with internal thread of the valve cavity (31411) of parts in the thread with way with a small pump delivery valve cavity sealing plug (3144), small pump delivery valve ball (3142) set in a small pump out the bottom of the valve cavity (3141), small pump out the oil valve spring (3143) set in a small pump delivery valve cavity (3141), the small pump out the oil valve spring (3143), the upper part of the bearing in the pump delivery valve cavity sealing plug (3144), the bottom bearing in the pump delivery valve ball (3142), stated out the oil (311 f) and small pump delivery valve cavity (3141).

7. jack hydraulic press according to claim 3, it is characterized in that described oil return control valve (315) comprises oil return control valve pocket (3151), oil return control valve steel ball (3152), oil return control valve swivel nut (3153) and oil return control valve valve knob (3154), oil return control valve pocket (3151) is being opened on described valve body (31) corresponding to described operating cylinder back oil road (311g) and the position, boundary of described back oil road (311i), oil return control valve steel ball (3152) is arranged in oil return control valve pocket (3151), and between operating cylinder back oil road (311g) and back oil road (311i), oil return control valve swivel nut (3153) be formed in control valve swivel nut on the chamber wall of oil return control valve pocket (3151) and connect internal thread (31511) screw thread and connect, oil return control valve knob (3154) and oil return control valve swivel nut (3153) threaded engagement, and this oil return control valve knob (3154) contacts with oil return control valve steel ball (3152) towards one end of oil return control valve steel ball (3152), and oil return control valve knob (3154) is stretched over outside oil return control valve swivel nut (3153) away from one end of oil return control valve steel ball (3152), and and then lean out the side, front side of valve body (31), described pressure regulator valve (317) comprises pressure regulation valve pocket (3171), pressure regulator valve steel ball (3172), pressure regulator valve spring (3173), pressure regulating screw (3174) and pressure regulator valve blind nut (3175), pressure regulation valve pocket (3171) is being opened on described valve body (31) corresponding to described little pump superpressure draining road (311h) and the position, boundary of back oil road (311i), pressure regulator valve steel ball (3172) is arranged in pressure regulation valve pocket (3171), one end of pressure regulator valve spring (3173) is bearing on pressure regulator valve steel ball (3172), the other end is bearing on pressure regulating screw (3174), adjust screw (3174) and pressure regulation valve pocket internal thread (31711) threaded engagement being formed on the chamber wall of pressure regulation valve pocket (3171), pressure regulator valve blind nut (3175) is corresponding to afterbody and same and pressure regulation valve pocket internal thread (31711) threaded engagement of pressure regulating screw (3174), pressure regulating screw (3174) is covered and protected.

8. jack hydraulic press according to claim 3, it is characterized in that described speed speed control valve (316) comprises speed speed control valve pocket processed (3161), speed speed control valve steel ball (3162), speed speed control valve swivel nut (3163) and speed speed control valve knob (3164), speed speed control valve pocket processed (3161) is being opened on described valve body (31) corresponding to the position between described large pump turnover oil duct (311d) and back oil road (311i), speed speed control valve steel ball (3162) is arranged in speed speed control valve pocket processed (3161), speed speed control valve swivel nut (3163) be formed in swivel nut on the chamber wall of speed speed control valve pocket processed (3161) and connect internal thread (31611) and connect, speed speed control handle (3164) and speed speed control valve swivel nut (3163) threaded engagement, and this speed speed control valve knob (3164) contacts with speed speed control valve steel ball (3162) towards one end of speed speed control valve steel ball (3162), and speed speed control valve knob (3164) is stretched over outside speed speed control valve swivel nut (3163) away from one end of speed speed control valve steel ball (3162), and and then lean out the side, right side of valve body (31).

9. jack hydraulic press according to claim 3, it is characterized in that described large pump oil sucting valve (318) comprises large pump oil suction valve pocket (3181), large pump oil sucting valve steel ball (3182) and large pump oil sucting valve spring (3183), large pump oil suction valve pocket (3181) is opened on described valve body (31) in the position of the below corresponding to described large oil pump outlet valve (313), large pump oil sucting valve steel ball (3182) is arranged on the bottom of large pump oil suction valve pocket (3181), the upper end of large pump oil sucting valve spring (3183) is bearing in the top of large pump oil suction valve pocket (3181), and lower end is supported on large pump oil sucting valve steel ball (3182), described large pump oil suction road (311b) communicates with large pump oil suction valve pocket (3181), described little pump oil sucting valve (319) comprises little pump oil suction valve pocket (3191), little pump oil sucting valve steel ball (3192) and little pump oil sucting valve spring (3193), little pump oil suction valve pocket (3191) is opened on valve body (31) in the position of the below corresponding to described little oil pump outlet valve (314), this little pump oil suction valve pocket (3191) is longitudinally parallel with described large pump oil suction valve pocket (3181), and corresponding to the rear side of large pump oil suction valve pocket (3181), little pump oil sucting valve steel ball (3192) is arranged on the bottom of little pump oil suction valve pocket (3191), the upper end of little pump oil sucting valve spring (3193) is bearing in the top of little pump oil suction valve pocket (3191), and lower end is bearing on little pump oil sucting valve steel ball (3192), described oil suction road (311c) communicates with little pump oil suction valve pocket (3191).

10. jack hydraulic press according to claim 3, it is characterized in that being embedded with large pump plunger shaft sealing ring (31212) on the chamber wall in described large pump plunger shaft chamber (3121), and on the chamber wall in described little pump plunger shaft chamber (3122), be embedded with little pump plunger shaft sealing ring (31223), described large pump plunger shaft (321) is sealed and matched with large pump plunger shaft sealing ring (31212), and described little pump plunger shaft (322) is sealed and matched with little pump plunger shaft sealing ring (31223).