Pure electrically-driven shoemaking hydraulic press

Abstract

The utility model discloses a pure electrically-driven shoemaking hydraulic press, which is characterized in that an upper hydraulic pressure die and a lower hydraulic pressure die are arranged in a shoemaking working chamber, and high-precision die assembly control is realized through an electric cylinder driving device and a four-corner symmetrical connecting rod transmission structure. A servo motor of the electric cylinder driving device drives an output shaft of a linear cylinder body to drive a lifting push plate to vertically move along a positioning slide rod; the four connecting rod assemblies convert linear motion of the ascending push plate into synchronous lifting of the lower water pressing mold through hinged linkage of the first connecting rods, the second connecting rods and the linkage connecting rods. The positioning sliding rod is matched with the sliding seat to ensure the movement straightness, and the four-connecting-rod structure ensures that the die assembly stress is uniform. The shoemaking forming machine achieves high-precision die assembly through a connecting rod transmission structure, solves the problems that traditional pneumatic equipment is unstable in pressure and oil pressure equipment is high in energy consumption and poor in stability, has the advantages of being efficient, capable of saving energy, stable in operation and convenient and fast to maintain, reduces energy consumption by more than 50% compared with the traditional machine type, reduces noise smaller than or equal to 65 dB, and improves production efficiency. And the high-efficiency, stable and environment-friendly requirements of the shoe material pressing process are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to shoemaking equipment technical field especially pure electric drive's shoemaking hydraulic press. BACKGROUND

[0002] Water pressure type shoemaking forming machine is applicable to leisure shoes and sole bonding process of various sports shoes, prevents fire hydraulic oil from being injected into cylinder and using oil pump pressure, makes the internal pressure of water pressure cylinder increase, carries out all -round extrusion to the sole workpiece through high -strength telescopic rubber skin piece, makes sole all -round adhesion.

[0003] However, the existing water pressure type shoemaking forming machine, more adopt cylinder drive device to drive upper and lower water pressure cylinders to carry out mold clamping or mold opening, specifically, any one water pressure cylinder of upper and lower water pressure cylinders is vertically movable, and is slidably installed on the vertical guide rod of the machine body, and is driven in the upward and downward direction by the cylinder fixed on the machine body, but this cylinder driving mode has poor mold clamping precision, poor mold clamping locking stability, and is prone to cause pressure relief and adhesion deviation during forming processing. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a pure electric drive's shoemaking hydraulic press, cancels cylinder drive upper and lower water pressure cylinders to carry out mold clamping / mold opening, makes the equipment reach pure electric drive, improves the easy -to -use of equipment and reduces its maintenance cost, improves mold clamping precision and mold clamping stability, and improves forming quality.

[0005] In order to achieve the above object, the utility model adopts the technical scheme: a pure electric drive's shoemaking hydraulic press, the middle position of host computer is equipped with the intermediate platform, with the intermediate platform as the limit, the inner chamber of host computer is divided into shoemaking work chamber and assembly chamber, the inside of shoemaking work chamber is equipped with mutually mould matching's upper water pressure mould and lower water pressure mould, upper water pressure mould and lower water pressure mould are respectively connected with oil supply device, upper water pressure mould is fixed in the top of shoemaking work chamber, the both sides of intermediate platform are fixed with positioning slide respectively, the both sides of the bottom of lower water pressure mould are equipped with positioning slide rod, two positioning slide rods are respectively inserted in corresponding positioning slide, the intermediate platform is equipped with electric cylinder drive device and connecting rod transmission structure, wherein, electric cylinder drive device includes servo motor and linear cylinder body, linear cylinder body is fixed in the bottom of intermediate platform, its output shaft is movably extended to the upper surface of intermediate platform, servo motor is fixedly connected with linear cylinder body or host computer and is driven to be connected with linear cylinder body, connecting rod transmission structure includes ascending push plate and four connecting rod assemblies, the both sides of ascending push plate are equipped with a linear bearing respectively and are slidably connected with corresponding positioning slide rod through the two linear bearings, the center position of ascending push plate is connected with the output shaft of linear cylinder body, four connecting rod assemblies are respectively located in the four corner portions of intermediate platform, and each connecting rod assembly includes lower hinge seat, first connecting rod, second connecting rod and linkage connecting rod, the table top of intermediate platform is fixedly installed with lower hinge seat, one end of first connecting rod is connected to the top of lower hinge seat through a rotating shaft, the upper end of first connecting rod is formed with a linkage connecting portion protruding laterally, the upper end of first connecting rod and the lower end of second connecting rod are connected through another rotating shaft, the bottom surface of lower water pressure mould is provided with corresponding upper hinge seat at the four corner portions, the upper end of second connecting rod is connected to corresponding upper hinge seat through another rotating shaft, one end of linkage connecting rod is connected to the linkage connecting portion of first connecting rod through another rotating shaft, and the other end is connected to ascending push plate through another rotating shaft, and each rotating shaft in the same connecting rod assembly is arranged in parallel.

[0006] In further technical solutions, each connecting rod assembly includes two first connecting rods of the same specification arranged symmetrically, the two first connecting rods are arranged on the outer sides of the connecting rod assembly, and the two first connecting rods are connected to the same rotating shaft to form a double-supported connecting rod assembly.

[0007] In further technical solutions, the top of the lower hinge seat is recessed to form two recesses arranged at intervals, the rotating shafts are arranged in the two recesses in series, and the bottom ends of the two first connecting rods in the same connecting rod assembly are movably assembled in the corresponding recesses and rotatably connected to the rotating shafts.

[0008] In a further technical solution, the first connecting rod, the second connecting rod and the linkage connecting rod are respectively connected and assembled through corresponding rotating shafts, the rotating shafts are made of high-purity bearing steel, the diameter of the rotating shafts is 10mm-30mm, and the fitting clearance of the rotating shafts is 0.02mm-0.05mm.

[0009] In a further technical solution, a control device is further arranged, the control device is electrically connected with the oil supply device and the electric cylinder driving device respectively; a position trigger rod is arranged on the side of the lower water pressure mold and extends in the horizontal direction; a position sensor is arranged on the upper part of the shoemaking working chamber and is electrically connected with the control device; the position sensor is triggered in cooperation with the position trigger rod, and when the position trigger rod triggers the position sensor, the lower water pressure mold is just matched with the upper water pressure mold.

[0010] In a further technical solution, the oil supply device comprises an oil cylinder and an oil supply driving motor, the inside of the oil cylinder is provided with a pressure changing cavity, a sliding block is slidably arranged on one side of the pressure changing cavity, and an interface is arranged on the other side of the pressure changing cavity; the interface is connected with the upper water pressure mold and the lower water pressure mold through a high-pressure pipe, and the sliding block moves away from or approaches the interface to reduce or increase the oil pressure in the inside of the pressure changing cavity; the oil supply driving motor is fixed on one side of the oil cylinder, is electrically connected with the control device, and is drivingly connected with the sliding block.

[0011] In a further technical solution, the assembling chamber is further provided with an oil tank, the output end of the oil tank is provided with an oil injection electric pump and an electromagnetic valve which are electrically connected with the control device, and the electromagnetic valve is connected with the oil cylinder or the upper water pressure mold and the lower water pressure mold through another high-pressure oil pipe.

[0012] In a further technical solution, the upper water pressure mold and the lower water pressure mold respectively comprise water pressure mold assemblies which are the same in structure, the water pressure mold assembly comprises a mold pressing cylinder body, the mold pressing cylinder body is in a cylindrical shape, the mold pressing of the mold pressing cylinder body is in an open shape and is covered with a rubber sheet, the rubber sheet has elastic stretching performance, and the rubber sheets between the upper water pressure mold and the lower water pressure mold form a shoe material fitting position.

[0013] In a further technical solution, the side of the mold pressing cylinder body is provided with a pressure sensor which is electrically connected with the control device and is used for detecting the oil pressure in the inside of the mold pressing cylinder body.

[0014] After the above structure is adopted, the present application has the following advantages compared with the prior art:

[0015] 1. The electric cylinder device driven by servo motor replaces the traditional hydraulic system, and realizes millimeter-level precision adjustment of the mold closing process through the cooperative control of the linear cylinder body and the connecting rod transmission. Compared with the hydraulic drive, the energy consumption is reduced by more than 40%, and the hydraulic system does not need to be supplied with pressure by the oil pump motor, so that the equipment layout is flexible and the production line of the workshop is easy to reorganize. The closed-loop control of the servo motor enables the mold closing speed to be programmable, the response speed is improved by 30%, and the multi-maintenance points of the hydraulic system are effectively eliminated.

[0016] 2. The connecting rod assembly symmetrically distributed in four corners constitutes a redundant force system, and cooperates with the double-supported connecting rod combination design, so that the uniformity of load distribution is improved by 85% during the lifting of the water pressure mold. The positioning slide rod and the slide are matched with high-precision gaps, combined with a high-strength bearing steel rotating shaft with a diameter of 10-30 mm, to ensure that the straightness error of the mold closing trajectory is less than 0.02 mm, avoid the eccentric wear problem of the traditional guide rod structure, and prolong the service life of the equipment by more than 3 times.

[0017] 3. The integrated pressure sensor and position trigger system realizes real-time feedback control of the mold closing pressure (0.1-5 MPa) and the stroke (±0.1 mm). The hydraulic compensation system composed of the oil injection electric pump and the electromagnetic valve can complete the dynamic balance of the oil pressure within 0.5 seconds, and eliminate the fitting deviation caused by the creep of the rubber sheet. Experimental data shows that the uniformity of the shoe sole fitting is improved by 28%, and the defective product rate is reduced from 5% of the traditional equipment to less than 0.3%. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described below in combination with the drawings and embodiments.

[0019] Figure 1 It is the structural schematic diagram of the utility model.

[0020] Figure 2 It is the internal structure schematic diagram of the utility model.

[0021] Figure 3 It is the cross section schematic diagram of the utility model.

[0022] Figure 4 It is the structural schematic diagram of the electric cylinder driving device in the utility model.

[0023] Figure 5 It is the structural schematic diagram of the oil supply device in the utility model. DETAILED DESCRIPTION

[0024] The following is only the preferred embodiment of the utility model, and does not limit the protection scope of the utility model.

[0025] As Figures 1 to 5As shown, a kind of pure electric driving shoemaking hydraulic press, including main machine 1, the middle position of main machine 1 is equipped with intermediate platform 13, to limit, the inner cavity of main machine 1 is divided to form shoemaking working chamber 11 and assembly chamber 12 with intermediate platform 13, the inside of shoemaking working chamber 11 is equipped with mutually mould matching upper hydraulic mould 2 and lower hydraulic mould 3, and oil supply device 5 is respectively connected with upper hydraulic mould 2 and lower hydraulic mould 3, upper hydraulic mould 2 is fixed to the top of shoemaking working chamber 11, the both sides of intermediate platform 13 are respectively fixed with positioning sliding seat 131, the both sides of the bottom of lower hydraulic mould 3 are respectively equipped with positioning slide rod 31, and the two positioning slide rods 31 are respectively slidably inserted into corresponding positioning sliding seat 131;Intermediate platform 13 is equipped with electric cylinder driving device and connecting rod transmission structure, wherein, electric cylinder driving device includes servo motor 41 and linear cylinder body 42, linear cylinder body 42 is fixed to the bottom of intermediate platform 13, its output shaft is movably extended to the upper surface of intermediate platform 13, servo motor 41 is equipped with a transmission box 43 between linear cylinder body 42, transmission box 43 is fixedly connected to the bottom of linear cylinder body 42, and servo motor 41 is fixed to transmission box 43, and the inside of transmission box 43 is equipped with two belt pulley transmission structures, and servo motor 41 is driven and connected to linear cylinder body 42 by belt pulley transmission structure;Connecting rod transmission structure includes ascending push plate 43 and four connecting rod assemblies, the both sides of ascending push plate 43 are respectively equipped with one linear bearing 430, and are slidably connected to corresponding positioning slide rod 31 by the two linear bearings 430, and the center position of ascending push plate 43 is connected with the output shaft of linear cylinder body 42;The four connecting rod assemblies are respectively located at the four corner portions of intermediate platform 13, and each connecting rod assembly includes lower hinge seat 40, first connecting rod 45, second connecting rod 46 and linkage connecting rod 44, and lower hinge seat 40 is fixedly installed on the table top of intermediate platform 13;One end of first connecting rod 45 is connected to the top of lower hinge seat 40 by rotating shaft, and the upper end of first connecting rod 45 is formed with the linkage connecting portion protruding laterally, and the upper end of first connecting rod 45 is connected to the lower end of second connecting rod 46 by another rotating shaft;The four corner portions of the bottom surface of lower hydraulic mould 3 are respectively equipped with corresponding upper hinge seat 32, and the upper end of second connecting rod 46 is connected to corresponding upper hinge seat 32 by another rotating shaft;One end of linkage connecting rod 44 is connected to the linkage connecting portion of first connecting rod 45 by another rotating shaft, and the other end is connected to ascending push plate 43 by another rotating shaft;Each rotating shaft in the same connecting rod assembly is arranged in parallel.

[0026] The electric cylinder device driven by the servo motor 41 replaces the traditional hydraulic driving device, and through the coordinated control of the linear cylinder body 42 and the connecting rod transmission, the millimeter-level precision adjustment of the mold closing process is realized. Compared with the pneumatic driving, the energy consumption is reduced by more than 40%, the maintenance points are less, the failure rate is low, the equipment layout is flexible, and the production line reorganization of the workshop is facilitated. The closed-loop control of the servo motor enables the mold closing speed to be programmable, the response speed is improved by 30%, and the mold closing instability caused by pressure fluctuation is effectively eliminated.

[0027] The upper part of the front side of the shoe forming machine in the embodiment is provided with an operation window, the operation window is communicated with the shoe material fitting work chamber 11, and the shoe material is put into the shoe material fitting work station 10 through the operation window. The operation window is provided with a lifting safety door 101, which is controlled to be closed before the mold is closed to prevent accidental operation from being inserted, reduce the operation risk of the equipment, and improve the safety. In addition, one side of the operation window is also provided with an infrared safety sensing element 102 for detecting whether the hand is inserted or not. When the infrared safety sensing element 102 detects that the hand is inserted or other foreign matters, a stop signal is sent to the control device to prohibit starting.

[0028] Specifically, the top of the shoe forming machine is provided with a display screen 18, and the display screen 18 is connected with the control device and used for displaying the running state of the equipment, so as to facilitate the operator to observe.

[0029] Specifically, the bottom of the shoe forming machine is provided with a plurality of rollers 19 for position transfer of the equipment.

[0030] The connecting rod assembly of each of the embodiment includes two first connecting rods 45 of the same specification which are symmetrically arranged, the two first connecting rods 45 are arranged on the outer side of the connecting rod assembly, and the two first connecting rods 45 are connected to the same rotating shaft to form a double-supported connecting rod combination.

[0031] The double-supported connecting rod combination can make the transmission structure more stable, reduce the mechanical vibration generated in the connecting rod action process, and further improve the mold closing precision and service life.

[0032] The top of the lower hinge seat 40 is recessed to form two recesses arranged at intervals, and the rotating shafts are respectively arranged in the two recesses. The bottom ends of the two first connecting rods 45 in the same connecting rod assembly are respectively movably assembled in the corresponding recesses and are rotatably connected with the rotating shafts.

[0033] The first connecting rod 45, the second connecting rod 46 and the linkage connecting rod 44 are respectively rotatably connected and assembled through the corresponding rotating shafts. The rotating shafts are made of high-purity bearing steel, the diameter of the rotating shafts is 30 mm, and the fitting clearance of the rotating shafts is 0.02 mm.

[0034] The four-corner symmetrical distribution of the connecting rod assembly constitutes a redundant force system, and the double support connecting rod combination design makes the load distribution uniformity of the down-water pressure mold lifting process improve by 85%. The positioning slide rod 31 and the slide seat 131 adopt high-precision gap cooperation, combined with a high-strength bearing steel rotating shaft with a diameter of 10-30 mm, to ensure that the straightness error of the mold closing trajectory is less than 0.02 mm, avoiding the eccentric wear problem of the traditional guide rod structure, and prolonging the service life of the equipment by more than 3 times.

[0035] The shoe forming machine in the embodiment is also provided with a control device, which is electrically connected to the oil supply device 5 and the electric cylinder driving device respectively; the side of the down-water pressure mold 3 is provided with a position trigger rod which extends in the horizontal direction; the upper part of the shoe working chamber 11 is provided with a position sensor which is electrically connected to the control device; the position sensor and the position trigger rod trigger cooperate; when the position trigger rod triggers the position sensor, the down-water pressure mold 3 is just matched with the up-water pressure mold 2.

[0036] When the position trigger rod triggers the position sensor, the position sensor sends an electrical signal representing stop to the control device, and the control device controls the electric cylinder driving device to stop running and remain in the mold closing position, preparing for the mold closing of the next pressure forming.

[0037] Specifically, the oil supply device 5 includes an oil cylinder 51 and an oil supply driving motor 52, the inside of the oil cylinder 51 is provided with a variable pressure cavity 510, one side of the variable pressure cavity 510 is slidably provided with a sliding block 511, the other side of the variable pressure cavity 510 is provided with an interface 512, the interface 512 is connected to the up-water pressure mold 2 and the down-water pressure mold 3 through a high-pressure pipe, and the sliding block 511 moves away from or approaches the interface 512 to reduce or increase the oil pressure inside the variable pressure cavity 510; the oil supply driving motor 52 is fixed to one side of the oil cylinder 51, and is electrically connected to the control device and drivingly connected to the sliding block 511.

[0038] The side of the oil supply device 5 is provided with a fixed vertical plate 50, the oil supply driving motor 52 and the oil cylinder 51 are fixed to the same side of the fixed vertical plate 50, and the other side of the fixed vertical plate 50 is provided with two belt pulley units 501, the two belt pulley units 501 are wound with a transmission belt, and the oil supply driving motor 52 is drivingly connected to the oil cylinder 51 through the belt pulley transmission structure. The oil supply driving motor 52 is also a servo motor device, which uses the non-return performance of the servo motor to lock the mold closing state, and the locking state is stable and reliable, further reducing the risk of mold loosening and improving the quality and yield of shoe material forming.

[0039] The assembly chamber 12 is also provided with an oil tank 6, the output end of the oil tank 6 is provided with an oil injection electric pump 7 and an electromagnetic valve 71 which are electrically connected to the control device, and the electromagnetic valve 71 is connected to the up-water pressure mold 2 and the down-water pressure mold 3 through another high-pressure oil pipe.

[0040] The upper water pressure die 2 and the lower water pressure die 3 respectively comprise water pressure die assemblies which are identical in structure, and the water pressure die assembly comprises a die cylinder body which is arranged in a cylindrical shape, the die cylinder body is provided with an open die closing surface, and the die closing surface is covered with a rubber skin piece which has elastic stretching performance, and the rubber skin pieces of the upper water pressure die 2 and the lower water pressure die 3 form a shoe material fitting station 10.

[0041] The side of the die cylinder body is provided with a pressure sensor which is electrically connected to the control device and is used for detecting the oil pressure in the die cylinder body.

[0042] The oil supply device 5 of the water pressure machine in the embodiment also adopts an electric pump structure to pressurize the upper water pressure die 2 and the lower water pressure die 3, eliminates the structure of the oil pump motor drive in the prior art, and further improves the electrification of the whole machine.

[0043] The integrated pressure sensor and position trigger system realizes real-time feedback control of the die closing pressure of 0.1-20 MPa and the stroke of ±0.1 mm. The hydraulic compensation system composed of the oil injection electric pump 7 and the electromagnetic valve 71 can complete oil pressure dynamic balance within 0.5 seconds, and eliminate the molding deviation caused by the creep of the rubber skin piece. Experimental data shows that the uniformity of shoe sole fitting is improved by 28%, and the defective product rate is reduced from 5% of the traditional equipment to below 0.3%.

[0044] The above is only a preferred embodiment of the utility model, and for ordinary skilled persons in the art, the specific implementation manner and application range can be changed according to the idea of the utility model, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A pure electric driving shoe hydraulic press, comprising a main machine (1), an intermediate platform (13) is arranged at the middle position of the main machine (1), and the inner cavity of the main machine (1) is divided into a shoe working chamber (11) and an assembly chamber (12) by the intermediate platform (13), the inside of the shoe working chamber (11) is provided with an upper hydraulic mold (2) and a lower hydraulic mold (3) which are matched with each other, the upper hydraulic mold (2) and the lower hydraulic mold (3) are respectively connected with an oil supply device (5), and the upper hydraulic mold (2) is fixed to the top of the shoe working chamber (11), characterized in that: Two positioning sliding seats (131) are respectively fixed on both sides of the intermediate platform (13), and two positioning sliding rods (31) are respectively arranged on the bottom of the lower water pressure die (3), and the two positioning sliding rods (31) are respectively slidably inserted into the corresponding positioning sliding seats (131); The intermediate platform (13) is provided with an electric cylinder driving device and a connecting rod transmission structure, The electric cylinder driving device comprises a servo motor (41) and a linear cylinder body (42), the linear cylinder body (42) is fixed to the bottom of the intermediate platform (13), the output shaft of the linear cylinder body (42) is movably extended to the upper surface of the intermediate platform (13), the servo motor (41) is fixed to the linear cylinder body (42) or the main machine (1) and is drivingly connected to the linear cylinder body (42); The connecting rod transmission structure comprises a rising push plate (43) and four connecting rod assemblies, the rising push plate (43) is provided with two linear bearings (430) on both sides thereof and is slidably connected to the corresponding positioning sliding rods (31) through the two linear bearings (430), and the center position of the rising push plate (43) is connected with the output shaft of the linear cylinder body (42); the four connecting rod assemblies are respectively arranged at the four corner portions of the intermediate platform (13), each connecting rod assembly comprises a lower hinge seat (40), a first connecting rod (45), a second connecting rod (46) and a linkage connecting rod (44), and the lower hinge seat (40) is fixedly installed on the table top of the intermediate platform (13); one end of the first connecting rod (45) is connected to the top of the lower hinge seat (40) through a rotating shaft, the upper end portion of the first connecting rod (45) is formed with a linkage connecting portion protruding laterally, the upper end portion of the first connecting rod (45) is connected to the lower end portion of the second connecting rod (46) through another rotating shaft, the bottom surface of the lower water pressure die (3) is provided with corresponding upper hinge seats (32) at the four corner portions, the upper end portion of the second connecting rod (46) is connected to the corresponding upper hinge seat (32) through another rotating shaft, one end of the linkage connecting rod (44) is connected to the linkage connecting portion of the first connecting rod (45) through another rotating shaft, and the other end of the linkage connecting rod (44) is connected to the rising push plate (43) through another rotating shaft; the rotating shafts in the same connecting rod assembly are arranged in parallel.

2. A pure electric driving shoe hydraulic press according to claim 1, characterized in that: Each connecting rod assembly comprises two first connecting rods (45) of the same specification which are arranged in symmetry, the two first connecting rods (45) are arranged on the outer sides of the connecting rod assembly, and the two first connecting rods (45) are connected to the same rotating shaft to form a double-supported connecting rod assembly.

3. A pure electric driving shoe hydraulic press according to claim 2, characterized in that: The top of the lower hinge seat (40) is recessed to form two recesses arranged at intervals, the rotating shafts are arranged in the two recesses in series, the bottom ends of the two first connecting rods (45) in the same connecting rod assembly are movably assembled in the corresponding recesses and are rotatably connected with the rotating shafts.

4. A pure electric driving shoe hydraulic press according to claim 3, characterized in that: The first connecting rod (45), the second connecting rod (46) and the linkage connecting rod (44) are rotatably connected and assembled through the corresponding rotating shafts, the rotating shafts are made of high-purity bearing steel, the diameter of the rotating shafts is 10mm-30mm, and the fitting clearance of the rotating shafts is 0.02mm-0.05mm.

5. The pure electric driving shoe hydraulic press according to claim 1, characterized in that: The control device is electrically connected with the oil supply device (5) and the electric cylinder driving device respectively; the side of the lower water pressure mold (3) is provided with a position trigger lever which extends in the horizontal direction; the upper part of the shoemaking working chamber (11) is provided with a position sensor which is electrically connected with the control device, and the position sensor is triggered with the position trigger lever; when the position trigger lever triggers the position sensor, the lower water pressure mold (3) is just matched with the upper water pressure mold (2).

6. A pure electric driving shoe hydraulic press according to claim 5, characterized in that: The oil supply device (5) comprises an oil cylinder (51) and an oil supply driving motor (52), the inside of the oil cylinder (51) is provided with a pressure changing cavity (510), one side of the pressure changing cavity (510) is slidably provided with a sliding block (511), the other side of the pressure changing cavity (510) is provided with an interface (512), the interface (512) is connected with the upper water pressure mold (2) and the lower water pressure mold (3) through a high-pressure pipe, the sliding block (511) moves away from or approaches the interface (512) to reduce or increase the oil pressure in the inside of the pressure changing cavity (510); one side of the oil supply driving motor (52) is fixed to the oil cylinder (51), the oil supply driving motor (52) is electrically connected with the control device and is drivingly connected with the sliding block (511).

7. A pure electric driving shoe hydraulic press according to claim 6, characterized in that: The assembly chamber (12) is further provided with an oil tank (6), the output end of the oil tank (6) is provided with an oil injection electric pump (7) and an electromagnetic valve (71) which are electrically connected with the control device, the electromagnetic valve (71) is connected with the oil cylinder (51) or the upper water pressure mold (2) and the lower water pressure mold (3) respectively through another high-pressure oil pipe.

8. A pure electric driving shoe hydraulic press according to claim 7, characterized in that: The upper water pressure mold (2) and the lower water pressure mold (3) respectively comprise water pressure mold assemblies which are the same in structure, the water pressure mold assembly comprises a mold pressing cylinder body which is in the form of a cylinder, the mold pressing cylinder body is provided with an open mold matching surface and is covered with a rubber sheet, the rubber sheet has elastic stretching performance, and the rubber sheets of the upper water pressure mold (2) and the lower water pressure mold (3) form a shoe material fitting station (10).

9. A pure electrically driven shoemaking hydro press according to claim 8, characterized in that: The side of the mold pressing cylinder body is provided with a pressure sensor which is electrically connected with the control device and is used for detecting the oil pressure in the inside of the mold pressing cylinder body.

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