CN113060668B - Integrated electric hydraulic jack - Google Patents

Integrated electric hydraulic jack Download PDF

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Publication number
CN113060668B
CN113060668B CN202110400200.6A CN202110400200A CN113060668B CN 113060668 B CN113060668 B CN 113060668B CN 202110400200 A CN202110400200 A CN 202110400200A CN 113060668 B CN113060668 B CN 113060668B
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CN
China
Prior art keywords
hydraulic
valve
mounting hole
shell
jack
Prior art date
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Active
Application number
CN202110400200.6A
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Chinese (zh)
Other versions
CN113060668A (en
Inventor
王江涛
宋进元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Heami Machinery Co ltd
Original Assignee
Zhejiang Heami Machinery Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Heami Machinery Co ltd filed Critical Zhejiang Heami Machinery Co ltd
Priority to CN202110400200.6A priority Critical patent/CN113060668B/en
Publication of CN113060668A publication Critical patent/CN113060668A/en
Application granted granted Critical
Publication of CN113060668B publication Critical patent/CN113060668B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/30—Constructional features with positive brakes or locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/44—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with self-contained electric driving motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/024—Pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/027—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1428—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods
    • F15B15/1461—Piston rod sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/202—Externally-operated valves mounted in or on the actuator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B2015/268—Fluid supply for locking or release independent of actuator pressurisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Actuator (AREA)

Abstract

The invention belongs to the technical field of jacks, and provides an integrated electric hydraulic jack, which comprises a hydraulic shell, wherein a driving mechanism and a hydraulic cylinder mechanism are arranged in the hydraulic shell, the driving mechanism comprises a motor and a component A formed by a gear pump connected with the motor, the hydraulic cylinder mechanism comprises a cylinder sleeve and a component B formed by a hydraulic ejector rod inserted in the cylinder sleeve, the component A and the component B are respectively arranged in a hydraulic shell mounting hole D and a mounting hole E, and the working principle of the jack drives the hydraulic ejector rod to slide upwards or downwards through the rising and falling of oil pressure in the hydraulic cylinder mechanism to complete the whole lifting or descending process of the jack; the invention has the advantages that: the traditional hydraulic jack and the electric hydraulic station are skillfully designed together and share one set of hydraulic control system, so that the number of parts is greatly reduced, and the production, use and maintenance costs are reduced.

Description

Integrated electric hydraulic jack
Technical Field
The invention belongs to the technical field of jacks, and particularly relates to an integrated electric hydraulic jack.
Background
At present, the traditional manual and semi-electric pallet trucks in the market all adopt manual hydraulic jacks, and the traditional electric pallet trucks all adopt electric hydraulic pump stations as lifting power. There are several disadvantages to manual hydraulic jack designs: the device can only be assembled on manual and semi-electric pallet trucks, and the application range cannot be expanded to all-electric pallet trucks; the cargo can be lifted to the working height only by pressing by manpower for ten times, under the condition of full load, the labor intensity of people is extremely high, the efficiency is extremely low, and the cargo lifting device is not suitable for large-load high-frequency use sites; in addition, the traditional electric hydraulic pump station uses electric drive, so that the defects of high labor intensity and low efficiency of the manual hydraulic jack can be overcome, but the number of parts and the manufacturing cost are increased due to the separated design and installation of the manual hydraulic jack and the oil cylinder.
Disclosure of Invention
The invention aims to provide an integrated electro-hydraulic jack with better effect.
The purpose of the invention is realized in the following way:
The utility model provides an integral type electric hydraulic jack, includes hydraulic housing, be provided with actuating mechanism and hydraulic cylinder mechanism in the hydraulic housing, actuating mechanism includes motor and the subassembly A that the gear pump that is connected with the motor constitutes, hydraulic cylinder mechanism includes the cylinder liner and peg graft the subassembly B that the hydraulic ram in the cylinder liner constitutes, and subassembly A and subassembly B install respectively in hydraulic housing mounting hole D and mounting hole E, still be provided with in the hydraulic housing by constant current valve assembly, check valve, the control mechanism and the relief valve subassembly that electromagnetic relief valve constitutes, the operating principle of jack is through the ascending and descending drive hydraulic ram of the interior oil pressure of hydraulic cylinder mechanism upwards slides or the process of descending of completion whole jack.
The invention is further provided with: the driving mechanism further comprises a valve plate arranged between the motor and the gear pump, the motor is assembled on one end face of the valve plate and fixed by a second screw, the end face of the input shaft of the gear pump is aligned with the end face opening of the output shaft of the motor and inserted into a middle hole of the valve plate, and the motor is fixed on the other end face of the valve plate by the second screw to form a component A.
The invention is further provided with: an O-shaped sealing ring III is arranged in a C hole of the hydraulic shell, and an O-shaped sealing ring IV is arranged in a B hole of the 21 gear pump.
The invention is further provided with: the hydraulic oil cylinder mechanism has the specific structure that: the first Y-shaped sealing ring, the first supporting sleeve, the second Y-shaped sealing ring, the second supporting sleeve, the third Y-shaped sealing ring, the third supporting sleeve and the fourth supporting sleeve are sequentially embedded into corresponding grooves on the inner surface of the cylinder sleeve, the first O-shaped sealing ring, the retainer ring and the second O-shaped sealing ring are sequentially assembled in the corresponding grooves on the outer surface of the cylinder sleeve, and then are inserted into the cylinder sleeve through the hydraulic ejector rod to form the component B.
The invention is further provided with: the constant flow valve assembly is formed by sequentially assembling a spring I and a constant flow valve core into a constant flow valve body, and is assembled in a mounting hole F of the hydraulic shell.
The invention is further provided with: the check valve is assembled in the mounting hole H of the hydraulic shell, and the electromagnetic pressure relief valve is assembled in the mounting hole I of the hydraulic shell.
The invention is further provided with: the safety valve assembly consists of a steel ball, a top cover, a second spring, a top bar and a straight groove plug which are sequentially assembled in the mounting hole G of the hydraulic shell, and a sealing ring five and an inner hexagonal plug are also assembled in the mounting hole G of the hydraulic shell at the outer end of the mounting valve assembly.
The invention is further provided with: and a vent valve is further arranged in the hydraulic shell and is assembled in the hydraulic shell mounting hole K.
The invention is further provided with: the outer side of the hydraulic shell is provided with a first end cover and a second end cover, the first end cover is assembled on the end face of the hydraulic shell mounting hole L, the second end cover is assembled on the end face of the hydraulic shell mounting hole I, and the second end cover is fixed at the position of the hydraulic shell mounting hole J through a fourth screw.
The invention is further provided with: the hydraulic shell is of a double-cylinder row structure.
Compared with the prior art, the invention has the following outstanding and beneficial technical effects:
the invention skillfully designs the traditional hydraulic jack and the electric hydraulic station together, shares a set of hydraulic control system, greatly reduces the number of parts and reduces the production, use and maintenance costs; the double-cylinder row modeling is adopted, the oil duct is totally built in, no external oil pipe is arranged, the whole vehicle can be designed more exquisite and lighter, and the hydraulic shell has the functions of installing other parts and storing hydraulic oil.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a partial schematic view of the present invention.
Fig. 3 is an exploded view of the present invention.
Fig. 4 is a schematic diagram of the present invention.
The names of the components corresponding to the reference numerals in the drawings are as follows: 1. a hydraulic ejector rod; 2. y-shaped sealing ring I; 3. a first supporting sleeve; 4. y-shaped sealing rings II; 5. a second supporting sleeve; 6. a Y-shaped sealing ring III; 7. a third supporting sleeve; 8. a support sleeve IV; 9. a cylinder liner; 10. o-shaped sealing rings I; 11. a retainer ring; 12. o-shaped sealing rings II; 13. a vent valve; 14. an end cover I; 15. an O-shaped sealing ring III; 16. an O-shaped sealing ring IV; 17. a first screw; 18. a motor; 19. a valve plate; 20. a second screw; 21. a gear pump; 22. a third screw; 23. a constant flow valve core; 24. a first spring; 25. a constant flow valve body; 26. a hydraulic housing; 27. an inner hexagon plug; 28. a fifth sealing ring; 29. a slot plug; 30. a top bar; 31. a second spring; 32. a top cover; 33. steel balls; 34. a one-way valve; 35. an electromagnetic pressure relief valve; 36. an end cover II; 37. a screw IV; 38. a mounting hole D; 39. a mounting hole E; 40. a hole C; 41. a hole B; 42. a mounting hole F; 43. a mounting hole H; 44. a mounting hole I; 45. a mounting hole G; 46. a mounting hole K; 47. a mounting hole L; 48. mounting hole J.
Detailed Description
The invention is further described in the following by way of specific embodiments with reference to the accompanying drawings, see fig. 1-4:
The utility model provides an integral type electric hydraulic jack, includes hydraulic housing 26, and hydraulic housing 26 is the double cylinder and allies oneself with row structure, is provided with actuating mechanism and hydraulic cylinder mechanism in the hydraulic housing 26, actuating mechanism includes motor 18 and the subassembly A that the gear pump 21 that is connected with motor 18 constitutes. Preferably, the driving mechanism further comprises a valve plate 19 arranged between the motor 18 and the gear pump 21, wherein the motor 18 is assembled on one end surface of the valve plate 19 and fixed by a second screw 20, and the end surface of the input shaft of the gear pump 21 is aligned with the end surface opening of the output shaft of the motor 18 and inserted into a middle hole of the valve plate 19 and fixed on the other end surface of the valve plate 19 by the second screw 20 to form an assembly A. The hydraulic oil cylinder mechanism comprises an oil cylinder sleeve 9 and a component B formed by a hydraulic ejector rod 1 inserted in the oil cylinder sleeve 9, and the hydraulic oil cylinder mechanism has the following specific structure: the Y-shaped sealing ring I2, the support sleeve I3, the Y-shaped sealing ring II 4, the support sleeve II 5, the Y-shaped sealing ring III 6, the support sleeve III 7 and the support sleeve IV 8 are sequentially embedded into corresponding grooves on the inner surface of the cylinder sleeve 9, the O-shaped sealing ring I10, the check ring 11 and the O-shaped sealing ring II 12 are sequentially assembled in corresponding grooves on the outer surface of the cylinder sleeve 9, and then the O-shaped sealing ring I10, the check ring 11 and the O-shaped sealing ring II are inserted into the cylinder sleeve 9 through the hydraulic ejector rod 1 to form the component B. The assembly A and the assembly B are respectively arranged in a mounting hole D38 and a mounting hole E39 of the hydraulic shell 26, a control mechanism consisting of a constant flow valve assembly, a one-way valve 34 and an electromagnetic pressure relief valve 35 and a safety valve assembly are also arranged in the hydraulic shell 26, and the working principle of the jack drives the hydraulic ejector rod 1 to slide upwards or downwards through the rising and falling of the oil pressure in the hydraulic cylinder mechanism so as to complete the lifting or falling process of the whole jack.
Preferably, the third O-ring 15 is disposed in the C-hole 40 of the hydraulic housing 26, and the fourth O-ring 16 is disposed in the B-hole 41 of the gear pump 21, 21.
Preferably, the constant flow valve assembly is composed of a first spring 24 and a constant flow valve core 23 which are assembled in sequence into a constant flow valve body 25, and the constant flow valve assembly is assembled in a mounting hole F42 of a hydraulic housing 26.
Preferably, the check valve 34 is fitted in the mounting hole H43 of the hydraulic housing 26, and the electromagnetic relief valve 35 is fitted in the mounting hole I44 of the hydraulic housing 26.
Preferably, the mounting valve assembly consists of a steel ball 33, a top cover 32, a second spring 31, a top bar 30 and a straight groove plug 29 which are sequentially assembled in a mounting hole G45 of the hydraulic housing 26, and a five-28 sealing ring and a hexagon socket plug 27 are also assembled in the mounting hole G45 of the hydraulic housing 26 at the outer end of the mounting valve assembly.
Preferably, a vent valve 13 is also provided in the hydraulic housing 26, the vent valve 13 fitting into a mounting hole K46 of the hydraulic housing 26.
Preferably, the outer side of the hydraulic housing 26 is provided with a first end cap 14 and a second end cap 36, the first end cap 14 is fitted on the end face of the mounting hole L47 of the hydraulic housing 26, the second end cap 36 is fitted on the end face of the mounting hole I44 of the hydraulic housing 26, and the second end cap 36 is fixed at the mounting hole J of the hydraulic housing 26 by a fourth screw 37.
The working principle of the invention is as follows:
the lifting process of the electric hydraulic jack is as follows:
The motor 18 is electrified, the motor 18 shaft rotates to drive the gear pump 21 to start working, hydraulic oil in the hydraulic shell 26 is sucked through an oil suction port of the gear pump 21, and pressurized is led to the valve plate 19 from a hole 41 (oil outlet) of the gear pump 21B;
The hydraulic oil is divided into two paths through the valve plate 19 by an oil duct, one path is led to the one-way valve 34, and the other path is led to the safety valve; hydraulic oil at the oil way of the one-way valve 34 is led to the hydraulic cylinder through the oil way to push the hydraulic jacking rod 30 to move upwards, so that the lifting process is realized;
the O-shaped sealing ring III 15 seals the hydraulic oil duct at the C hole 40 to prevent hydraulic oil from leaking;
The O-shaped sealing ring IV 16 seals the hydraulic oil duct at the position of the hole B41 to prevent hydraulic oil from leaking;
The check valve 34 prevents the hydraulic oil in a high-pressure state from flowing back to the oil storage cavity through the valve plate 19 and the gear pump 21 to cause oil pressure drop when the electromagnetic pressure relief valve 35 is not electrified and is in a closed state (namely, the oil return path is not opened), so that the hydraulic ejector rod 1 slides back under the action of external pressure;
the safety valve is in a normally closed state; when the hydraulic oil pressure exceeds a preset pressure threshold, the safety valve is switched to a passage state, the overpressure hydraulic oil is led back into the hydraulic shell 26 until the oil pressure is reduced to the safety threshold, and the safety valve is closed; the steel ball 33 controls the opening/closing of an oil way at the position, the top cover 32 ensures that the elastic force of the second spring 31 uniformly acts on the steel ball 33, the second spring 31 provides acting force for closing an oil way of the steel ball 33, the ejector rod ensures that the working state of the second spring 31 is stable and straight, the first groove plug 29 provides a fixing surface for the second spring 31, and the working pressure of the second spring 31 is controlled by adjusting the screwing quantity of the first groove plug 29, so that the pressure threshold value for opening the safety valve is set; the seal ring V28 and the inner hexagonal plug 27 ensure the sealing of the F-hole, and prevent hydraulic oil from leaking and prevent dust, sewage and other impurities from entering the oil duct;
the hydraulic ejector rod 1 is fixed at the mounting hole B of the hydraulic shell 26 by taking the cylinder sleeve 9 as a bearing body, and grooves on the inner surface and the outer surface of the cylinder sleeve 9 are used for mounting a supporting sleeve and a sealing ring;
the O-shaped sealing ring I10, the check ring 11 and the O-shaped sealing ring II 12 are arranged in corresponding grooves on the outer surface of the cylinder sleeve 9, so that the sealing between the cylinder sleeve 9 and the hydraulic shell 26 is ensured, and hydraulic oil is prevented from leaking from a gap between the cylinder sleeve 9 and the hydraulic shell 26;
the first supporting sleeve 3, the second supporting sleeve 5, the third supporting sleeve 7 and the fourth supporting sleeve 8 are arranged in corresponding grooves on the inner surface of the cylinder sleeve 9 and are used for supporting the hydraulic ejector rod 1, so that the relative gap between the hydraulic ejector rod 1 and the inner surface of the cylinder sleeve is ensured when the hydraulic ejector rod 1 moves up and down, and the damage of parts caused by hard friction on the metal surface is prevented;
The second Y-shaped sealing ring 4 and the third Y-shaped sealing ring 6 are arranged in corresponding grooves on the inner surface of the cylinder sleeve 9, so that the sealing between the cylinder sleeve 9 and the hydraulic ejector rod 1 is ensured, and the leakage of hydraulic oil from a gap between the cylinder sleeve 9 and the hydraulic ejector rod 1 is prevented;
The Y-shaped sealing ring I2 is arranged in a groove corresponding to the inner surface of the cylinder sleeve 9, so that dust, sewage and other impurities are prevented from entering the hydraulic cylinder;
the descending process of the electric hydraulic jack comprises the following steps:
the electromagnetic pressure relief valve 35 is communicated with the oil return path of the hydraulic cylinder, the oil return path is closed when the hydraulic cylinder is not electrified, the oil return path is opened when the hydraulic cylinder is electrified, the opening/closing of the valve is controlled by controlling the on/off of the electromagnetic valve, so that the on/off state of the oil return path of the hydraulic cylinder is controlled, when the oil return path of the hydraulic cylinder is in a passage state, hydraulic oil in the hydraulic cylinder flows back into the hydraulic shell 26 through the electromagnetic pressure relief valve 35 and the constant flow valve to realize pressure relief of the hydraulic oil, the hydraulic ejector rod 1 slides back under the action of external pressure, and the descending process is completed;
After the constant-flow valve is positioned in the oil way of the electromagnetic pressure relief valve 35, the flow of hydraulic oil is automatically kept constant by adjusting the opening of the valve, so that the damage of a hydraulic power unit caused by the too high speed when the hydraulic ejector rod 1 descends is prevented, the relative position of the valve core 23 of the constant-flow valve and the valve body 25 of the constant-flow valve is changed by axial displacement, and the opening of the valve is adjusted; the elastic force of the first spring 24 acts on the valve core 23 of the constant flow valve, and the starting value of the constant flow valve and the flow rate of hydraulic oil are regulated by regulating the elastic coefficient of the first spring 24.
Structural parts and accessories in the embodiment:
The hydraulic shell 26 provides an assembly foundation for all parts and has the functions of an oil storage cavity, a hydraulic oil cylinder, a hydraulic oil duct, an electric appliance wiring harness wiring groove and the like;
the vent valve 13 is communicated with the oil storage cavity, so that the dynamic balance between the pressure in the oil storage cavity and the atmospheric pressure is ensured, and meanwhile, the air valve has a certain dustproof and waterproof function;
the first end cover 14 is used for plugging an electrical appliance wiring harness wiring groove;
The second end cover 36 is used for plugging the mounting hole G45, and the fourth screw 37 is used for fixing the second end cover 36.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims (8)

1. An integrated electro-hydraulic jack comprising a hydraulic housing (26), characterized in that: the hydraulic oil cylinder mechanism comprises an oil cylinder sleeve (9) and a component B formed by a hydraulic ejector rod (1) inserted in the oil cylinder sleeve (9), the component A and the component B are respectively arranged in a mounting hole D (38) and a mounting hole E (39) of the hydraulic shell (26), a control mechanism and a safety valve component which are formed by a constant flow valve component, a one-way valve (34) and an electromagnetic relief valve (35) are further arranged in the hydraulic shell (26), the working principle of the jack drives the hydraulic ejector rod (1) to slide upwards or slide downwards through the rising and falling of oil pressure in the hydraulic oil cylinder mechanism to finish the rising or falling process of the whole jack, and the hydraulic oil cylinder mechanism has the following specific structure: y type sealing washer one (2), support cover one (3), Y type sealing washer two (4), support cover two (5), Y type sealing washer three (6), support cover three (7) and support cover four (8) are embedded into the corresponding slot of cylinder liner (9) internal surface in proper order, O type sealing washer one (10), retaining ring (11), O type sealing washer two (12) assemble in proper order in cylinder liner (9) surface corresponding slot, rethread hydraulic ram (1) inserts cylinder liner (9) and pinch and form subassembly B, the constant current valve subassembly comprises spring one (24), constant current valve case (23) assemble in proper order to constant current valve body (25), the constant current valve subassembly is assembled in mounting hole F (42) of hydraulic housing (26).
2. An integrated electro-hydraulic jack as claimed in claim 1, wherein: the driving mechanism further comprises a valve plate (19) arranged between the motor (18) and the gear pump (21), the motor (18) is assembled on one end face of the valve plate (19) and fixed by a second screw (20), and the other end face of the valve plate (19) is fixed to the other end face of the valve plate (19) by the second screw (20) after the end face of the input shaft of the gear pump (21) is aligned with the end face opening of the output shaft of the motor (18) and inserted into the middle hole of the valve plate (19).
3. An integrated electro-hydraulic jack as claimed in claim 2, wherein: an O-shaped sealing ring III (15) is arranged in a C hole (40) of the hydraulic shell (26), and an O-shaped sealing ring IV (16) is arranged in a B hole (41) of the gear pump (21).
4. An integrated electro-hydraulic jack as claimed in claim 1, wherein: the check valve (34) is assembled in a mounting hole H (43) of the hydraulic housing (26), and the electromagnetic relief valve (35) is assembled in a mounting hole I (44) of the hydraulic housing (26).
5. An integrated electro-hydraulic jack as claimed in claim 1, wherein: the safety valve assembly consists of a steel ball (33), a top cover (32), a second spring (31), a top bar (30) and a straight groove plug (29) which are sequentially assembled in a mounting hole G (45) of the hydraulic housing (26), and a sealing ring five (28) and an inner hexagonal plug (27) are also assembled in the mounting hole G (45) of the hydraulic housing (26) at the outer end of the mounting valve assembly.
6. An integrated electro-hydraulic jack as claimed in claim 1, wherein: a vent valve (13) is further arranged in the hydraulic shell (26), and the vent valve (13) is assembled in a mounting hole K (46) of the hydraulic shell (26).
7. An integrated electro-hydraulic jack as claimed in claim 1, wherein: the outside of the hydraulic shell (26) is provided with a first end cover (14) and a second end cover (36), the first end cover (14) is assembled on the end face of a mounting hole L (47) of the hydraulic shell (26), the second end cover (36) is assembled on the end face of a mounting hole I (44) of the hydraulic shell (26), and the second end cover (36) is fixed at a mounting hole J of the hydraulic shell (26) through a fourth screw (37).
8. An integrated electro-hydraulic jack as claimed in any one of claims 1 to 7, wherein: the hydraulic shell (26) is of a double-cylinder row structure.
CN202110400200.6A 2021-04-14 2021-04-14 Integrated electric hydraulic jack Active CN113060668B (en)

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CN203237978U (en) * 2013-03-26 2013-10-16 钟露艾 Hydraulic jack
CN203128110U (en) * 2013-04-08 2013-08-14 嘉兴瑞来五金有限公司 Power-driven hydraulic jack
CN105460832A (en) * 2015-12-11 2016-04-06 江苏威凯石化冶金装备有限公司 Power-driven hydraulic jack
CN109384166A (en) * 2017-08-08 2019-02-26 广东合即得能源科技有限公司 A kind of electric hydraulic lifting jack
CN212356376U (en) * 2020-05-08 2021-01-15 浙江海蜜机械有限公司 Hydraulic jack

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CN215249272U (en) * 2021-04-14 2021-12-21 浙江海蜜机械有限公司 Integrated electric hydraulic jack

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