Electric control hydraulic power device
By designing an overvoltage return trigger mechanism and switching mechanism in the electrically controlled hydraulic power device, the problem of continuous pumping of transmission fluid caused by the continuous pumping of transmission fluid when external pipelines are blocked or compressed overvoltage is solved, and the safety of the device is achieved in the case of overvoltage Sex and stability.
Patent Information
- Application Number
- CN202411136395.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-02-07
AI Technical Summary
When the external pipeline is blocked or overvolt, the sensor at the output end is not triggered, and the solenoid valve cannot be closed in response, resulting in continuous pumping of transmission fluid, which can easily cause the pipeline to rupture.
An electrically controlled hydraulic power device is designed, including a pump fluid mechanism, an overvoltage return trigger mechanism and an overvoltage return switch mechanism. Through the provided overpressure return trigger mechanism and overpressure return switch mechanism, when overpressure is detected, the transmission fluid can flow back to the hydraulic oil tank to avoid rupture of the pipe.
It effectively avoids the continuous pressure and rupture of the pipe caused by the sensor not triggering, ensuring the safety and stability of the device in the case of overpressure.
Smart Images
Figure CN119393405A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of hydraulic technology, in particular to an electronically controlled hydraulic power device. Background Art
[0002] Hydraulic power packs serve as a power source for hydraulic tools and generate a flow of transmission fluid that is used to power such tools. Typically, some hydraulic power packs contain an engine, a hydraulic pump, and similar components that provide an output of transmission fluid through hoses that can be connected to hydraulic tools to power those tools.
[0003] Most of the electronically controlled hydraulic power units on the market directly pump the transmission fluid to the rear solenoid valve through a hydraulic pump when in use, and then directly distribute it to various pipelines. They cannot provide protection against fluid overpressure. When the external pipeline is blocked or compressed with overpressure, the sensor at the output end is not triggered, the solenoid valve cannot respond and close, and the transmission fluid will continue to be pumped out, which can easily cause the pipeline to rupture. Summary of the invention
[0004] In view of the deficiencies of the prior art, the present invention provides an electronically controlled hydraulic power device to solve the problems mentioned in the above background.
[0005] The present invention provides the following technical solution: an electrically controlled hydraulic power device, comprising: a pumping mechanism, an overpressure reflux trigger mechanism is arranged on the surface of the pumping mechanism, an overpressure reflux switch mechanism is arranged below the overpressure reflux trigger mechanism, a filtering structure is installed inside one side of the pumping mechanism, and an explosion-proof mechanism is installed inside the pumping mechanism.
[0006] Preferably, the pumping mechanism includes a hydraulic oil tank, a tank cover, an electromagnetic distributing valve, a liquid pump, a liquid outlet pipe, a liquid outlet check valve, a liquid return pipe, a liquid return check valve, a connecting pipe, a five-way mounting pipe and a hydraulic gauge, the tank cover is fixedly connected to the top of the hydraulic oil tank, the electromagnetic distributing valve and the liquid pump are both fixedly mounted on the upper surface of the tank cover, the liquid outlet pipe is fixedly connected between the tank cover and the input end of the liquid pump, the liquid outlet check valve is fixedly mounted in the middle of the liquid outlet pipe, the liquid return pipe is fixedly connected between the tank cover and the electromagnetic distributing valve, the liquid return check valve is fixedly mounted at one end of the liquid return pipe, the connecting pipe is fixedly connected between the output end of the liquid pump and the electromagnetic distributing valve, the five-way mounting pipe is fixedly mounted in the middle of the connecting pipe, the hydraulic gauge is fixedly mounted at one end of the five-way mounting pipe, and the interior of the hydraulic oil tank is filled with transmission fluid.
[0007] Preferably, the over-pressure backflow trigger mechanism includes a mechanical cylinder, a guide curved surface, a gear ring seat, an inner guide cylinder and a flow hole, the mechanical cylinder is fixedly connected to the top end of the five-way mounting tube, the guide curved surface is arranged on the inner bottom wall of the mechanical cylinder, the gear ring seat is fixedly connected to the inside of the bottom end of the mechanical cylinder, the inner guide cylinder is fixedly connected to the inner wall of the mechanical cylinder, the flow hole is opened through the surface of the gear ring seat, and the surface of the mechanical cylinder is provided with a scale window.
[0008] Preferably, the over-pressure reflux trigger mechanism includes a piston column, a push block and a pressure piston, the piston column is movably arranged inside the mechanical cylinder, the push block is fixedly sleeved on the surface of the piston column, the pressure piston is fixedly installed at one end of the piston column, and the surface of the pressure piston is slidably connected to the inner wall of the inner guide cylinder.
[0009] Preferably, the over-pressure reflux trigger mechanism also includes a liquid sealing column, a first retracted column and a second retracted column, the liquid sealing column is fixedly inserted at the bottom end of the piston column, the first retracted column is integrally arranged at the bottom end of the liquid sealing column, the second retracted column is integrally arranged at the bottom end of the first retracted column, the outer diameter of the first retracted column is smaller than the outer diameter of the liquid sealing column, and the outer diameter of the second retracted column is smaller than the outer diameter of the first retracted column.
[0010] Preferably, the overpressure backflow trigger mechanism also includes a fixed guide cylinder, a moving guide cylinder, a guide groove, a guide ridge, a gasket and an adjusting spring, the fixed guide cylinder is fixedly connected to the inner wall of the top end of the mechanical cylinder, the moving guide cylinder is slidably connected to the inner wall of the fixed guide cylinder, the guide groove is opened on the surface of the moving guide cylinder, the guide ridge is integrally arranged on the inner wall of the fixed guide cylinder, and the inner wall of the guide groove is slidably connected to the surface of the guide ridge, the gasket is movably arranged at the bottom end of the moving guide cylinder and the top of the push block, and the adjusting spring is movably installed between the two gaskets.
[0011] Preferably, the over-pressure backflow trigger mechanism also includes an adjusting cylinder, a constant pressure port, a constant pressure hole, an adjusting twist wheel, a first sealing ring, a gasket and a compression-closing spring. The adjusting cylinder is rotatably connected to the inner wall of the top end of the fixed guide cylinder through a bearing, and the adjusting cylinder is threadedly connected to the moving guide cylinder. The constant pressure port and the constant pressure hole are both opened through the surface of the adjusting cylinder. The adjusting twist wheel is fixedly sleeved on the top end of the adjusting cylinder. The first sealing ring is fixedly connected to the inner wall of the adjusting cylinder, and the surface of the first sealing ring is slidably connected to the surface of the piston column. The gasket is movably connected to the top end of the piston column and the inner wall of the adjusting cylinder, and the compression-closing spring is movably installed between the two gaskets.
[0012] Preferably, the over-pressure reflux switch mechanism includes a liquid return cylinder, a closing seat, a second sealing ring and a support frame, the liquid return cylinder is fixedly connected to the bottom end of the five-way mounting tube, the closing seat is fixedly connected to the inside of the liquid return cylinder, the second sealing ring is fixedly connected to the inner wall of the closing seat, the support frame is fixedly connected to the inner wall of the bottom end of the closing seat, and the surface of the second sealing ring is slidably connected to the surface of the first retracted column.
[0013] Preferably, the filtering structure includes an inner tube, a flow port, a sealing gasket, a pick-up and release rack, a filter element and a threaded cover, the inner tube is fixedly connected to the interior of the hydraulic oil tank, and the inner tube is fixedly connected to the liquid return one-way valve, the flow port is opened through one end of the inner tube, the sealing gasket is fixedly connected to the inner wall of the inner tube, the pick-up and release rack is slidably connected to the interior of the inner tube, the filter element is fixedly installed inside the pick-up and release rack, and the threaded cover is threadedly connected to one end of the inner tube.
[0014] Preferably, the explosion-proof mechanism includes an inner connecting tube, a through hole, a pressure-relief piston, a cover ring, a pressure-relief spring and an isolation rubber membrane, the inner connecting tube is fixedly connected to the inner wall of the oil tank cover plate, the through hole is penetrated and opened at the bottom end of the inner connecting tube, the pressure-relief piston is slidably connected to the inner wall of the inner connecting tube, the cover ring is fixedly connected to the inner wall of the inner connecting tube, the pressure-relief spring is movably connected between the inner connecting tube and the cover ring, and the isolation rubber membrane is fixedly connected to the inner wall of the cover ring.
[0015] Compared with the prior art, the present invention has the following beneficial effects: The electronically controlled hydraulic power device, through the provided pump mechanism, overpressure reflux trigger mechanism, overpressure reflux switch mechanism, filter structure and explosion-proof mechanism, can open the overpressure reflux switch mechanism through the overpressure reflux trigger mechanism to return the transmission fluid to the interior of the hydraulic oil tank when the external pipeline is blocked or compressed due to overpressure, so as to avoid the pipeline being ruptured due to continuous pressure on the pipeline caused by the failure of the sensor at the output end to be triggered and the inability of the solenoid valve to respond and close.
[0016] The electronically controlled hydraulic power device, through the mechanical cylinder, guide surface, gear ring seat, inner guide cylinder, flow hole, piston column, push block and pressure piston, utilizes the hydraulic principle to reduce the hydraulic triggering pressure ratio by shrinking the hydraulic area, ensuring that a larger hydraulic pressure can trigger the pressure piston to rise, avoiding triggering the backflow effect within the normal working hydraulic range.
[0017] The electronically controlled hydraulic power device is provided with a liquid sealing column, a first retracted column and a second retracted column, so as to control the on-off of the transmission fluid reflux channel by changing the difference in outer diameters of the first retracted column and the second retracted column.
[0018] The electric-controlled hydraulic power device is provided with a fixed guide cylinder, a movable guide cylinder, a guide groove, a guide ridge, a gasket and an adjusting spring, so as to adjust the pressure value during overpressure protection by compressing the expansion and contraction degree of the adjusting spring.
[0019] The electrically controlled hydraulic power device, through the arranged adjusting cylinder, constant pressure port, constant pressure hole, adjusting twist wheel, first sealing ring, cushion block and compression closing spring, can control the extension and retraction of the moving guide cylinder by twisting the adjusting twist wheel, and then control the extension and retraction of the adjusting spring, so as to achieve the size regulation of the overpressure value, and provide a constant and large minimum pressure value through the compression closing spring, so as to ensure that the overpressure value is regulated above this minimum pressure value.
[0020] The electrically controlled hydraulic power device can realize the opening and closing action of the reflux channel by cooperating with the liquid sealing column, the first retracted column and the second retracted column through the provided liquid return cylinder, the closing seat, the second sealing ring and the supporting frame.
[0021] The electric-controlled hydraulic power device facilitates the disassembly and replacement of the filter element at any time by arranging the inner edge cylinder, the flow port, the sealing pad, the pick-up and placement rack, the filter element and the threaded cover, thereby improving the convenience of replacing the filter element.
[0022] The electronically controlled hydraulic power device provides a certain expansion margin for the air on the liquid surface when thermal expansion occurs due to the increase of temperature through the provided inner connection tube, through hole, pressure-relief piston, cover ring, pressure-relief spring and isolation rubber membrane. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a rear view of the present invention; Figure 3 It is a structural schematic diagram of the overvoltage return switch mechanism of the present invention; Figure 4 It is a schematic diagram of the connection structure between the overvoltage reflux trigger mechanism and the overvoltage reflux switch mechanism of the present invention; Figure 5 It is a side sectional view of the overpressure backflow trigger mechanism of the present invention; Figure 6 It is a side sectional view of the overvoltage return switch mechanism of the present invention; Figure 7 This is a schematic diagram of the internal explosion structure of the mechanical cylinder of the present invention; Figure 8 It is a schematic diagram of the connection structure between the piston column and the liquid sealing column of the present invention; Fig. 9 This is a schematic diagram of the internal explosion structure of the filter structure of the present invention; Fig.10 It is a cross-sectional view of the explosion-proof mechanism of the present invention.
[0024] In the figure: 101, hydraulic oil tank; 102, oil tank cover; 103, electromagnetic distribution valve; 104, liquid pump; 105, liquid outlet pipe; 106, liquid outlet check valve; 107, liquid return pipe; 108, liquid return check valve; 109, connecting pipe; 110, five-way installation pipe; 111, hydraulic gauge; 201, mechanical cylinder; 202, guide surface; 203, gear ring seat; 204, inner guide cylinder; 205, flow hole; 206, piston column; 207, push block; 208, pressure piston; 209, liquid sealing column; 210, first retracted column; 211, second retracted column; 212, fixed guide cylinder; 213, dynamic guide cylinder; 214, guide Groove; 215, guide ridge; 216, gasket; 217, adjustment spring; 218, adjustment cylinder; 219, constant pressure port; 220, constant pressure hole; 221, adjustment wheel; 222, first sealing ring; 223, cushion block; 224, closing spring; 301, return liquid cylinder; 302, closing seat; 303, second sealing ring; 304, support frame; 401, inner edge cylinder; 402, flow port; 403, sealing gasket; 404, pick-up and place frame; 405, filter element; 406, threaded cover; 501, inner connection cylinder; 502, through hole; 503, pressure relief piston; 504, cover ring; 505, pressure relief spring; 506, isolation rubber membrane. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] See also Figure 1-10 The electronically controlled hydraulic power device comprises: a pump mechanism, an overpressure reflux trigger mechanism is arranged on the surface of the pump mechanism, an overpressure reflux switch mechanism is arranged below the overpressure reflux trigger mechanism, a filter structure is installed inside one side of the pump mechanism, and an explosion-proof mechanism is installed inside the pump mechanism. By means of the pump mechanism, the overpressure reflux trigger mechanism, the overpressure reflux switch mechanism, the filter structure and the explosion-proof mechanism, when the external pipeline is blocked or compressed by overpressure, the overpressure reflux trigger mechanism can open the overpressure reflux switch mechanism to return the transmission fluid to the inside of the hydraulic oil tank 101, so as to avoid the pipeline being continuously pressurized and ruptured due to the failure of the solenoid valve to respond and close due to the sensor at the output end not being triggered.
[0027] Wherein, the pump mechanism includes a hydraulic oil tank 101, a tank cover plate 102, an electromagnetic distribution valve 103, a liquid pump 104, a liquid outlet pipe 105, a liquid outlet check valve 106, a liquid return pipe 107, a liquid return check valve 108, a connecting pipe 109, a five-way installation pipe 110 and a hydraulic gauge 111. The tank cover plate 102 is fixedly connected to the top of the hydraulic oil tank 101, the electromagnetic distribution valve 103 and the liquid pump 104 are fixedly installed on the upper surface of the tank cover plate 102, the liquid outlet pipe 105 is fixedly connected between the tank cover plate 102 and the input end of the liquid pump 104, and the outlet The liquid check valve 106 is fixedly installed in the middle of the liquid outlet pipe 105, the liquid return pipe 107 is fixedly connected between the oil tank cover 102 and the electromagnetic distribution valve 103, the liquid return check valve 108 is fixedly installed at one end of the liquid return pipe 107, the connecting pipe 109 is fixedly connected between the output end of the liquid pump 104 and the electromagnetic distribution valve 103, the five-way installation pipe 110 is fixedly installed in the middle of the connecting pipe 109, the hydraulic gauge 111 is fixedly installed at one end of the five-way installation pipe 110, and the interior of the hydraulic oil tank 101 is filled with transmission fluid to facilitate pumping and distribution of the transmission fluid.
[0028] Among them; the overpressure backflow trigger mechanism includes a mechanical cylinder 201, a guide surface 202, a gear ring seat 203, an inner guide cylinder 204 and a flow hole 205, the mechanical cylinder 201 is fixedly connected to the top of the five-way mounting tube 110, the guide surface 202 is arranged on the inner bottom wall of the mechanical cylinder 201, the gear ring seat 203 is fixedly connected to the inside of the bottom end of the mechanical cylinder 201, the inner guide cylinder 204 is fixedly connected to the inner wall of the mechanical cylinder 201, the flow hole 205 is opened through the surface of the gear ring seat 203, and the surface of the mechanical cylinder 201 is provided with a scale window.
[0029] Among them; the overpressure reflux trigger mechanism includes a piston column 206, a push block 207 and a pressure piston 208, the piston column 206 is movably arranged inside the mechanical cylinder 201, the push block 207 is fixedly sleeved on the surface of the piston column 206, the pressure piston 208 is fixedly installed at one end of the piston column 206, and the surface of the pressure piston 208 is slidably connected to the inner wall of the inner guide cylinder 204, through the mechanical cylinder 201, the guide surface 202, the gear ring seat 203, the inner guide cylinder 204, the flow hole 205, the piston column 206, the push block 207 and the pressure piston 208 are arranged, so as to utilize the hydraulic principle, reduce the hydraulic triggering pressure ratio by shrinking the hydraulic area, ensure that a larger hydraulic pressure can trigger the pressure piston 208 to rise, and avoid triggering the reflux effect within the normal working hydraulic range.
[0030] Among them; the overpressure reflux trigger mechanism also includes a liquid sealing column 209, a first retracted column 210 and a second retracted column 211. The liquid sealing column 209 is fixedly inserted at the bottom end of the piston column 206, the first retracted column 210 is integrally arranged at the bottom end of the liquid sealing column 209, the second retracted column 211 is integrally arranged at the bottom end of the first retracted column 210, and the outer diameter of the first retracted column 210 is smaller than the outer diameter of the liquid sealing column 209, and the outer diameter of the second retracted column 211 is smaller than the outer diameter of the first retracted column 210. By setting the liquid sealing column 209, the first retracted column 210 and the second retracted column 211, the transmission fluid reflux channel can be controlled through the different outer diameter differences of the first retracted column 210 and the second retracted column 211.
[0031] Among them; the overpressure backflow trigger mechanism also includes a fixed guide cylinder 212, a moving guide cylinder 213, a guide groove 214, a guide ridge 215, a gasket 216 and an adjusting spring 217, the fixed guide cylinder 212 is fixedly connected to the inner wall of the top of the mechanical cylinder 201, the moving guide cylinder 213 is slidably connected to the inner wall of the fixed guide cylinder 212, the guide groove 214 is opened on the surface of the moving guide cylinder 213, the guide ridge 215 is integrally arranged on the inner wall of the fixed guide cylinder 212, and the inner wall of the guide groove 214 is slidably connected to the surface of the guide ridge 215, the gasket 216 is movably arranged at the bottom end of the moving guide cylinder 213 and the top of the push block 207, and the adjusting spring 217 is movably installed between the two gaskets 216, through the set fixed guide cylinder 212, the moving guide cylinder 213, the guide groove 214, the guide ridge 215, the gasket 216 and the adjusting spring 217, so as to adjust the pressure value during overpressure protection by compressing the expansion and contraction degree of the adjusting spring 217.
[0032] The overpressure reflux trigger mechanism also includes an adjusting cylinder 218, a constant pressure port 219, a constant pressure hole 220, an adjusting torsion wheel 221, a first sealing ring 222, a cushion block 223 and a closing spring 224. The adjusting cylinder 218 is rotatably connected to the inner wall of the top end of the fixed guide cylinder 212 through a bearing, and the adjusting cylinder 218 is threadedly connected to the moving guide cylinder 213. The constant pressure port 219 and the constant pressure hole 220 are both penetrated and opened on the surface of the adjusting cylinder 218. The adjusting torsion wheel 221 is fixedly sleeved on the top end of the adjusting cylinder 218. The first sealing ring 222 is fixedly connected to the inner wall of the adjusting cylinder 218, and the surface of the first sealing ring 222 is slidably connected to the surface of the piston column 206. The pad 223 is movably connected to the top of the piston column 206 and the inner wall of the adjusting cylinder 218 respectively, and the compression spring 224 is movably installed between the two pads 223. Through the arranged adjusting cylinder 218, constant pressure port 219, constant pressure hole 220, adjusting twist wheel 221, first sealing ring 222, pad 223 and compression spring 224, the expansion and contraction of the moving guide cylinder 213 can be controlled by twisting the adjusting twist wheel 221, and then the expansion and contraction of the adjusting spring 217 can be controlled, so as to realize the size regulation of the overpressure value, and provide a constant and larger minimum pressure value through the compression spring 224 to ensure that the overpressure value is regulated above this minimum pressure value.
[0033] Among them; the overpressure reflux switch mechanism includes a liquid return cylinder 301, a closing seat 302, a second sealing ring 303 and a support frame 304, the liquid return cylinder 301 is fixedly connected to the bottom end of the five-way mounting tube 110, the closing seat 302 is fixedly connected to the inside of the liquid return cylinder 301, the second sealing ring 303 is fixedly connected to the inner wall of the closing seat 302, the support frame 304 is fixedly connected to the inner wall of the bottom end of the closing seat 302, and the surface of the second sealing ring 303 is slidably connected to the surface of the first retracted column 210. By setting the liquid return cylinder 301, the closing seat 302, the second sealing ring 303 and the support frame 304, the switching action of the reflux channel can be realized by cooperating with the liquid sealing column 209, the first retracted column 210 and the second retracted column 211.
[0034] Among them, the filtering structure includes an inner tube 401, a flow port 402, a sealing gasket 403, a pick-up and placement rack 404, a filter element 405 and a threaded cover 406. The inner tube 401 is fixedly connected to the inside of the hydraulic oil tank 101, and the inner tube 401 is fixedly connected to the liquid return one-way valve 108. The flow port 402 runs through one end of the inner tube 401, the sealing gasket 403 is fixedly connected to the inner wall of the inner tube 401, the pick-up and placement rack 404 is slidably connected to the inside of the inner tube 401, the filter element 405 is fixedly installed in the inside of the pick-up and placement rack 404, and the threaded cover 406 is threadedly connected to one end of the inner tube 401. By setting the inner tube 401, the flow port 402, the sealing gasket 403, the pick-up and placement rack 404, the filter element 405 and the threaded cover 406, the filter element 405 can be disassembled and replaced at any time, which improves the convenience of replacing the filter element 405.
[0035] Among them; the explosion-proof mechanism includes an inner tube 501, a through hole 502, a pressure-relief piston 503, a cover ring 504, a pressure-relief spring 505 and an isolation rubber membrane 506, the inner tube 501 is fixedly connected to the inner wall of the oil tank cover 102, the through hole 502 penetrates and is opened at the bottom end of the inner tube 501, the pressure-relief piston 503 is slidably connected to the inner wall of the inner tube 501, the cover ring 504 is fixedly connected to the inner wall of the inner tube 501, the pressure-relief spring 505 is movably connected between the inner tube 501 and the cover ring 504, and the isolation rubber membrane 506 is fixedly connected to the inner wall of the cover ring 504, and the inner tube 501, the through hole 502, the pressure-relief piston 503, the cover ring 504, the pressure-relief spring 505 and the isolation rubber membrane 506 are arranged so as to provide a certain expansion margin for the air on the liquid surface when thermal expansion occurs due to temperature rise.
[0036] Working principle: when in use, twist the adjusting wheel 221, the adjusting wheel 221 drives the adjusting cylinder 218 to rotate, and the adjusting cylinder 218 pushes the moving guide cylinder 213 to slide along the fixed guide cylinder 212, thereby controlling the compression degree of the adjusting spring 217, and adjusting the overpressure value by comparing the bottom edge of the moving guide cylinder 213 with the scale window; During pumping, the liquid pump 104 generates power to drive the transmission fluid to flow. The transmission fluid enters the liquid outlet pipe 105 from the hydraulic oil tank 101, then passes through the liquid outlet check valve 106 to enter the liquid pump 104, then enters the electromagnetic distribution valve 103 from the connecting pipe 109 to be distributed to various hydraulic terminals, and then flows back to the electromagnetic distribution valve 103 through the reflux pipe. The refluxed transmission fluid then enters the return pipe 107, passes through the return check valve 108 and enters the inner tube 401, and then is filtered by the filter element 405 and discharged back to the hydraulic oil tank 101 from the flow port 402. When the transmission fluid passes through the connecting pipe 109, it will pass through the five-way installation pipe 110. If the hydraulic pressure does not reach the overpressure value in normal operation, the hydraulic pressure squeezes the pressurized piston 208 to rise a small distance. At this time, the pressurized piston 208 slides in a small range, forming a constant pressure on the transmission fluid, reducing the change in the transmission fluid pressure, and the first retracted column 210 slides inside the second sealing ring 303, and the reflux channel is in a closed state. If the hydraulic pipeline is blocked or compressed at this time, the output end has not reached the specified state, the sensor has not been triggered, the liquid pump 104 and the electromagnetic distribution valve 103 cannot receive the closing electrical signal, so the liquid pump 104 continues to deliver the transmission fluid, and the hydraulic pressure between the hydraulic pipeline and the output end of the liquid pump 104 will be over-pressured. The over-pressure hydraulic pressure squeezes the pressurized piston 208 to rise a long distance, and the pressurized piston 208 drives the piston column 206 to rise synchronously. The piston column 206 drives the sealing column 209, the first retracted column 210 and the second retracted column 211 to rise synchronously, so that the first retracted column 210 gradually slides out of the second sealing ring 303, and the second retracted column 211 slides into the second sealing ring 303. At this time, the gap between the second sealing ring 303 and the second retracted column 211 is large to form a reflux channel, and the transmission fluid passes through the support frame 304 from the reflux channel and then flows back to the hydraulic oil tank 101, thereby achieving insurance; Until the liquid pump 104 is turned off or the hydraulic pressure is less than the overpressure value, the closing spring 224 and the adjusting spring 217 squeeze the piston column 206 and the pressurized piston 208 to descend and reset, at which time the first retracted column 210 is driven to slide into the second sealing ring 303 to close the reflux channel, so that the device continues to work normally; When the gas pressure inside the device is too high due to thermal expansion, the gas will push the pressure relief piston 503 upward, so that the space inside the hydraulic oil tank 101 increases, so that the internal pressure is relieved.
[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An electronically controlled hydraulic power unit, characterized in that: include: A pumping mechanism, wherein an overpressure reflux trigger mechanism is arranged on the surface of the pumping mechanism, an overpressure reflux switch mechanism is arranged below the overpressure reflux trigger mechanism, a filtering structure is installed inside one side of the pumping mechanism, and an explosion-proof mechanism is installed inside the pumping mechanism.
2. The electronically controlled hydraulic power device according to claim 1, characterized in that: The pump mechanism comprises a hydraulic oil tank (101), an oil tank cover plate (102), an electromagnetic distribution valve (103), a liquid pump (104), a liquid outlet pipe (105), a liquid outlet check valve (106), a liquid return pipe (107), a liquid return check valve (108), a connecting pipe (109), a five-way installation pipe (110) and a hydraulic gauge (111); the oil tank cover plate (102) is fixedly connected to the top of the hydraulic oil tank (101); the electromagnetic distribution valve (103) and the liquid pump (104) are both fixedly installed on the upper surface of the oil tank cover plate (102); the liquid outlet pipe (105) is fixedly connected to the oil tank cover plate (102) and the liquid pump (104); The liquid outlet check valve (106) is fixedly mounted in the middle of the liquid outlet pipe (105), the liquid return pipe (107) is fixedly connected between the oil tank cover plate (102) and the electromagnetic distribution valve (103), the liquid return check valve (108) is fixedly mounted on one end of the liquid return pipe (107), the connecting pipe (109) is fixedly connected between the output end of the liquid pump (104) and the electromagnetic distribution valve (103), the five-way installation pipe (110) is fixedly mounted in the middle of the connecting pipe (109), the hydraulic pressure gauge (111) is fixedly mounted on one end of the five-way installation pipe (110), and the interior of the hydraulic oil tank (101) is filled with transmission fluid.
3. The electronically controlled hydraulic power device according to claim 2, characterized in that: The overpressure backflow trigger mechanism comprises a mechanical cylinder (201), a flow guiding curved surface (202), a gear ring seat (203), an inner guide cylinder (204) and a flow through hole (205); the mechanical cylinder (201) is fixedly connected to the top end of a five-way mounting tube (110); the flow guiding curved surface (202) is arranged on the inner bottom wall of the mechanical cylinder (201); the gear ring seat (203) is fixedly connected to the inside of the bottom end of the mechanical cylinder (201); the inner guide cylinder (204) is fixedly connected to the inner wall of the mechanical cylinder (201); the flow through hole (205) is penetrated and opened on the surface of the gear ring seat (203); and a scale window is arranged on the surface of the mechanical cylinder (201).
4. The electronically controlled hydraulic power device according to claim 3, characterized in that: The overpressure reflux trigger mechanism comprises a piston column (206), a push block (207) and a pressure piston (208); the piston column (206) is movably arranged inside the mechanical cylinder (201); the push block (207) is fixedly sleeved on the surface of the piston column (206); the pressure piston (208) is fixedly installed on one end of the piston column (206); and the surface of the pressure piston (208) is slidably connected to the inner wall of the inner guide cylinder (204).
5. The electronically controlled hydraulic power device according to claim 4, characterized in that: The overpressure reflux trigger mechanism further comprises a liquid sealing column (209), a first retracted column (210) and a second retracted column (211); the liquid sealing column (209) is fixedly plugged into the bottom end of the piston column (206); the first retracted column (210) is integrally arranged at the bottom end of the liquid sealing column (209); the second retracted column (211) is integrally arranged at the bottom end of the first retracted column (210); the outer diameter of the first retracted column (210) is smaller than the outer diameter of the liquid sealing column (209); and the outer diameter of the second retracted column (211) is smaller than the outer diameter of the first retracted column (210).
6. The electronically controlled hydraulic power device according to claim 5, characterized in that: The overpressure backflow trigger mechanism further comprises a fixed guide cylinder (212), a movable guide cylinder (213), a guide groove (214), a guide ridge (215), a gasket (216) and an adjusting spring (217); the fixed guide cylinder (212) is fixedly connected to the inner wall of the top end of the mechanical cylinder (201); the movable guide cylinder (213) is slidably connected to the inner wall of the fixed guide cylinder (212); the guide groove (214) is provided on the surface of the movable guide cylinder (213); the guide ridge (215) is integrally arranged on the inner wall of the fixed guide cylinder (212); the inner wall of the guide groove (214) is slidably connected to the surface of the guide ridge (215); the gasket (216) is movably arranged at the bottom end of the movable guide cylinder (213) and the top of the push block (207), respectively; and the adjusting spring (217) is movably installed between the two gaskets (216).
7. The electronically controlled hydraulic power device according to claim 6, characterized in that: The overpressure backflow trigger mechanism further comprises an adjusting cylinder (218), a constant pressure port (219), a constant pressure hole (220), an adjusting twist wheel (221), a first sealing ring (222), a cushion block (223) and a closing spring (224); the adjusting cylinder (218) is rotatably connected to the inner wall of the top end of the fixed guide cylinder (212) via a bearing, and the adjusting cylinder (218) is threadedly connected to the moving guide cylinder (213); the constant pressure port (219) and the constant pressure hole (220) are both penetrated and provided in the adjusting cylinder The adjusting wheel (221) is fixedly sleeved on the top of the adjusting cylinder (218), the first sealing ring (222) is fixedly connected to the inner wall of the adjusting cylinder (218), and the surface of the first sealing ring (222) is slidably connected to the surface of the piston column (206), the cushion block (223) is movably connected to the top of the piston column (206) and the inner wall of the adjusting cylinder (218), and the compression spring (224) is movably installed between the two cushion blocks (223).
8. The electronically controlled hydraulic power device according to claim 7, characterized in that: The overpressure reflux switch mechanism comprises a liquid return cylinder (301), a closed seat (302), a second sealing ring (303) and a support frame (304); the liquid return cylinder (301) is fixedly connected to the bottom end of a five-way mounting tube (110); the closed seat (302) is fixedly connected to the inside of the liquid return cylinder (301); the second sealing ring (303) is fixedly connected to the inner wall of the closed seat (302); the support frame (304) is fixedly connected to the inner wall of the bottom end of the closed seat (302); and the surface of the second sealing ring (303) is slidably connected to the surface of the first retracted column (210).
9. The electronically controlled hydraulic power device according to claim 2, characterized in that: The filtering structure comprises an inner tube (401), a flow port (402), a sealing gasket (403), a take-and-place rack (404), a filter element (405) and a threaded cover (406); the inner tube (401) is fixedly connected to the inside of the hydraulic oil tank (101), and the inner tube (401) is fixedly connected to the liquid return check valve (108); the flow port (402) is opened through one end of the inner tube (401); the sealing gasket (403) is fixedly connected to the inner wall of the inner tube (401); the take-and-place rack (404) is slidably connected to the inside of the inner tube (401); the filter element (405) is fixedly installed inside the take-and-place rack (404); and the threaded cover (406) is threadedly connected to one end of the inner tube (401).
10. The electronically controlled hydraulic power device according to claim 2, characterized in that: The explosion-proof mechanism comprises an inner tube (501), a through hole (502), a pressure-relief piston (503), a cover ring (504), a pressure-relief spring (505) and an isolation rubber membrane (506); the inner tube (501) is fixedly connected to the inner wall of the oil tank cover plate (102); the through hole (502) is penetrated and opened at the bottom end of the inner tube (501); the pressure-relief piston (503) is slidably connected to the inner wall of the inner tube (501); the cover ring (504) is fixedly connected to the inner wall of the inner tube (501); the pressure-relief spring (505) is movably connected between the inner tube (501) and the cover ring (504); and the isolation rubber membrane (506) is fixedly connected to the inner wall of the cover ring (504).