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CN-224229002-U - Electrohydraulic integrated push rod

CN224229002UCN 224229002 UCN224229002 UCN 224229002UCN-224229002-U

Abstract

The utility model discloses an electrohydraulic integrated push rod which comprises a hydraulic cylinder and a drive control assembly which are sequentially connected, wherein the hydraulic cylinder comprises a cylinder assembly, a piston rod is slidably arranged in the cylinder assembly, the drive control assembly comprises a drive module, a valve block and an oil tank assembly, the valve block is arranged at the tail end of the oil tank assembly, the drive module comprises a drive motor, the drive motor is arranged at the rear end of the valve block, a motor shaft of the drive motor penetrates through the center of the valve block to be connected with a bidirectional gear pump, the bidirectional gear pump is arranged in the oil tank assembly, the PLC control system comprises a PLC controller and a power supply module, the hydraulic cylinder and the drive control assembly are arranged on the outer side of the oil tank, the requirements of compact structure and easy disassembly and assembly of the electrohydraulic integrated push rod are met, and the electrohydraulic integrated push rod is convenient to maintain and replace.

Inventors

  • LUO MINGQIANG
  • CHEN LIYA
  • LI KUAN

Assignees

  • 石家庄市液压有限责任公司

Dates

Publication Date
20260512
Application Date
20250623

Claims (10)

  1. 1. The electrohydraulic integrated push rod is characterized by comprising a hydraulic cylinder (100) and a drive control assembly (200) which are sequentially connected, wherein the hydraulic cylinder (100) and the drive control assembly (200) are assembled and connected through a connecting flange and a bolt assembly, the hydraulic cylinder (100) comprises a cylinder barrel assembly (110), a piston rod (120) is arranged in the cylinder barrel assembly (110) in a sliding mode, the drive control assembly (200) comprises a drive module (210), a valve block (220) and an oil tank assembly (230), the valve block (220) is arranged at the tail end of the oil tank assembly (230), the drive module (210) comprises a drive motor (2100), the drive motor (2100) is arranged at the rear end of the valve block (220), a motor shaft of the drive motor (2100) penetrates through the center of the valve block (220) to be connected with a bidirectional gear pump (2102), the bidirectional gear pump (2102) is arranged in the oil tank assembly (230), and the drive module comprises a PLC controller and a power supply module, and the controlled end of the drive motor (2100) is connected with the output end of the PLC controller.
  2. 2. The electro-hydraulic integrated push rod of claim 1, wherein a magnetic ring (180) is arranged at the right end part of a piston rod (120) positioned at the inner rear end of the cylinder barrel assembly, a displacement sensor (190) is arranged in the cylinder barrel assembly (110), and the output end of the displacement sensor (190) is connected with the input end of the PLC.
  3. 3. The electrohydraulic integrated push rod of claim 1, wherein the cylinder assembly (110) comprises a cylinder body (1100), a cylinder cavity (1102) which is completely penetrated is arranged in the center of the cylinder body (1100), the cylinder cavity (1102) is assembled with a piston rod (120) in a sliding mode, a cylinder head sealing piece (160) is arranged at the front end of the cylinder cavity (1102), a cylinder tail sealing piece (170) is arranged at the rear end of the cylinder cavity (1102), the piston rod (120) penetrates through the cylinder head sealing piece (160), a long oil pipe (1104) and a short oil pipe (1105) which are axially arranged along the cylinder body are respectively arranged in the outer side wall of the cylinder body (1100), an oil outlet of the long oil pipe (1104) is communicated with the cylinder cavity (1102) which is positioned at the front side of a piston block at the right end of the piston rod (120), and an oil outlet of the short oil pipe (1105) is communicated with the cylinder cavity (1102) which is positioned at the rear side of the piston block at the right end of the piston rod (120).
  4. 4. The electro-hydraulic integrated push rod of claim 3, wherein an anti-rotation rod mounting seat (1103) is arranged on the outer side wall of the cylinder barrel main body (1100), a connecting plate (130) is arranged at the front end of the piston rod (120), an anti-rotation rod (140) is arranged on the end face of the connecting plate (130) close to the piston rod (120), and the other end of the anti-rotation rod (140) is in sliding fit with the anti-rotation rod mounting seat (1103).
  5. 5. The electro-hydraulic integrated push rod of claim 3, wherein a protective cover (150) is arranged on the periphery of the piston rod (120) extending out of the cylinder barrel body (1100), one end of the protective cover (150) is fixedly arranged on the side wall of the piston rod (120), the other end of the protective cover is sleeved on the front part of the cylinder barrel body (1100), and the protective cover (150) is of a corrugated retractable structure.
  6. 6. The electro-hydraulic integrated push rod according to claim 3, wherein the oil tank assembly (230) comprises an oil tank main body (2300), an oil tank inner cavity (2301) is formed in the center of the oil tank main body (2300), two oil tank oil delivery pipes (2304) which are oppositely arranged and communicated with the valve block (220) are formed in the side wall of the oil tank main body (2300), one oil tank oil delivery pipe (2304) is communicated with a corresponding long oil pipe (1104), the other oil tank oil delivery pipe (2304) is connected with a corresponding short oil pipe (1105), an oil suction pipe (2302) which is communicated with a bidirectional gear pump (2102) is formed in the side wall of the oil tank main body (2300), and the other end of the oil suction pipe (2302) is communicated with the valve block (220).
  7. 7. The electro-hydraulic integrated push rod of claim 6, wherein a base plug (240) is arranged at the front end of the oil tank cavity (2301), a piston (250) is arranged on the inner side of the oil tank cavity (2301) close to the base plug (240), and the piston (250) is connected with the base plug (240) through a spring (260).
  8. 8. The electro-hydraulic integrated push rod of claim 6, wherein the valve block (220) comprises a valve block main body (2200), a threaded joint (2201) in threaded connection with the inner wall of the tail end of the oil tank main body (2300) is arranged at the front end of the valve block main body (2200), an oil inlet (2203) communicated with an oil suction pipe (2302) on the side wall of the oil tank main body is formed in the end face of the threaded joint (2201), an oil passing port (2204) communicated with an oil delivery pipe (2304) of the oil tank is formed in the end face of the valve block main body (2200), the oil inlet (2203) is connected with the oil passing port (2204) through valve block oil delivery pipes (2207) arranged on the valve block main body (2200), and an overflow pipeline (2208) is further arranged in the valve block main body (2200) and is communicated with the inner cavity (2301) of the oil tank.
  9. 9. The electro-hydraulic integrated push rod of claim 8, wherein a pressure sensor (2205) and a hydraulic connector (2206) are installed on the top end surface of the valve block main body (2200), a second one-way valve (2213), a third one-way valve (2214), a second one-way valve (2215) and a third one-way valve (2216) are installed on the front side surface of the valve block main body (2200), a first one-way valve (2209), a first one-way valve (2210), a second one-way valve (2211) and a first one-way valve (2212) are installed on the rear side surface of the valve block main body (2200), the output end of the pressure sensor (2205) is connected with the input end of the PLC, and the controlled ends of the first one-way valve (2209), the first one-way valve (2210), the second one-way valve (2211), the first one-way valve (2212), the second one-way valve (2213), the third one-way valve (2214), the second one-way valve (2215) and the third one-way valve (2216) are respectively connected with the output end of the PLC.
  10. 10. The electro-hydraulic integrated push rod of claim 9, wherein an oil inlet of the first one-way valve (2210) is communicated with an oil tank cavity (2301), an oil outlet of the first one-way valve (2210) is communicated with a left oil inlet of a bidirectional gear pump (2102), a left oil outlet of the bidirectional gear pump (2102) is communicated with a left oil flow path, the second overflow valve (2211) is arranged on a left overflow pipeline (2208) which is communicated with the oil tank cavity (2301), the left oil flow path consists of a left valve block oil conveying pipe (2207) in the valve block (220), a left oil tank oil conveying pipe (2304) and a long oil pipe (1104) in the hydraulic cylinder, an oil inlet of the second one-way valve (2213) is communicated with the oil tank cavity (2301), a right oil outlet of the bidirectional gear pump (2102) is communicated with a right oil flow path, the first overflow valve (2209) is arranged on a left overflow pipeline (2208) which is communicated with the oil tank cavity (2301), the first overflow valve (2205) is arranged on the right overflow pipeline (2205), and the third overflow valve (2204) is arranged on the left overflow pipeline (2205) in the oil tank cavity (2204) which is communicated with the high-pressure pipeline (2204) The third hydraulic control one-way valve (2216) is arranged on the right side oil flow path in sequence.

Description

Electrohydraulic integrated push rod Technical Field The utility model relates to the technical field of electro-hydraulic push rods, in particular to an electro-hydraulic integrated push rod. Background The electrohydraulic push rod is a hydraulic driving manipulator integrating machine, electricity and liquid, is suitable for reciprocating push-pull straight reciprocating rotation at a certain angle, is driven by a servo motor, a cylinder and the like in general, and is widely applied to the departments of metallurgy, mine, electric power, coal, machinery, traffic, grain, chemical industry, cement, water conservancy, building materials, transportation and the like. In the using process of the electro-hydraulic push rod, the servo motor is controlled to rotate positively and reversely, so that the bidirectional gear pump is driven to output pressure oil positively and negatively, the pressure oil is sent to the oil cylinder through the hydraulic control valve, the reciprocating motion of the piston rod of the oil cylinder is realized, and the basic working mode of the electro-hydraulic push rod is further realized. The existing electro-hydraulic push rod is simple in structure, large in size, inconvenient to use, assemble and maintain, incapable of meeting the requirements in actual use, and because the use environment is a large site with external dust, dust in air easily enters hydraulic oil, and the hydraulic cylinder cannot work normally when the oil is polluted. The utility model of China patent publication No. CN2074400U discloses an electrohydraulic push rod, which consists of a motor, a bidirectional gear pump, an oil way integrated block, an oil hydraulic cylinder, a coupling, an overflow valve, a shell and other main components, wherein the coupling, the bidirectional gear pump, the oil way integrated block, the oil cylinder and the overflow valve are all sealed in the shell. The utility model has compact structure and flexible configuration, but the whole shell needs to be detached during maintenance because the coupler, the bidirectional gear pump, the oil way integrated block, the oil cylinder and the overflow valve are all sealed in the shell, and the maintenance is complex. Disclosure of utility model The utility model aims to solve the technical problems of providing an electrohydraulic integrated push rod, which integrates the characteristics of small volume and flexible configuration of a current-collecting push rod and the characteristics of stable operation, high reliability and small high-speed impact force of an oil hydraulic cylinder, and the electrohydraulic integrated push rod needs to meet the requirements of compact structure and easy disassembly and assembly, and is convenient for maintenance and replacement. In order to solve the technical problems, the technical scheme adopted by the utility model is as follows. The electrohydraulic integrated push rod comprises a hydraulic cylinder and a driving control assembly which are sequentially connected, wherein the hydraulic cylinder and the driving control assembly are assembled and connected through a connecting flange and a bolt assembly, the hydraulic cylinder comprises a cylinder assembly, a piston rod is arranged in the cylinder assembly in a sliding mode, the driving control assembly comprises a driving module, a valve block and an oil tank assembly, the valve block is arranged at the tail end of the oil tank assembly, the driving module comprises a driving motor, the driving motor is arranged at the rear end of the valve block, a motor shaft of the driving motor penetrates through the center of the valve block to be connected with a bidirectional gear pump, the bidirectional gear pump is arranged in the oil tank assembly, and the electrohydraulic integrated push rod further comprises a PLC (programmable logic controller) and a power supply module, and the controlled end of the driving motor is connected with the output end of the PLC. Above-mentioned electrohydraulic integrated push rod, the magnetic ring is installed to the piston rod right-hand member portion that is located the inside rear end of cylinder assembly, installs displacement sensor in the cylinder assembly, and displacement sensor's output is connected with the input of PLC controller. The electro-hydraulic integrated push rod comprises a cylinder barrel body, wherein a cylinder barrel inner cavity which is completely penetrated is arranged in the center of the cylinder barrel body, the cylinder barrel inner cavity is assembled with a piston rod in a sliding mode, a cylinder barrel head sealing piece is arranged at the front end of the cylinder barrel inner cavity, a cylinder barrel tail sealing piece is arranged at the rear end of the cylinder barrel inner cavity, the piston rod penetrates through the cylinder barrel head sealing piece, a long oil pipe and a short oil pipe which are axially arranged along the cylinder barrel body are respectively arranged in t