Driving control assembly for electro-hydraulic integrated push rod

Abstract

The utility model discloses a drive control assembly for an electro-hydraulic integrated push rod, which comprises a drive module, a valve block, an oil tank assembly and a PLC (programmable logic controller), and the valve block is mounted 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, and the controlled end of the driving motor is connected with the output end of the PLC; a motor shaft of the driving motor penetrates through the center of the valve block to be connected with the bidirectional gear pump, and the bidirectional gear pump is arranged in the oil tank assembly. The front end of the oil tank assembly is provided with a mounting flange which is conveniently connected with a hydraulic cylinder; the peripheral side of the tail end of the oil tank assembly is provided with a lug plate which is conveniently connected with a valve block; the mounting flange is arranged at the front end of the oil tank assembly and detachably connected with the hydraulic cylinder, the lug plate is arranged at the rear end of the oil tank assembly and connected with the valve block, assembly and disassembly are convenient, split connection of all components is achieved, and follow-up maintenance is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of electro-hydraulic actuator technology, specifically to a drive control assembly for an electro-hydraulic integrated actuator. Background Technology

[0002] Electro-hydraulic actuators are hydraulically driven manipulators that integrate mechanics, electricity, and hydraulics. They are suitable for reciprocating push-pull and linear / rotational movements at a certain angle. They are universal drives, similar to servo motors and cylinders, and are widely used in metallurgy, mining, power, coal, machinery, transportation, grain, chemical, cement, water conservancy, building materials, and transportation industries.

[0003] During operation, the electro-hydraulic actuator controls the forward and reverse rotation of the servo motor, which drives the bidirectional gear pump to output pressure oil in both directions. This oil is then sent to the cylinder via the hydraulic control valve, thus realizing the reciprocating motion of the cylinder piston rod and achieving its basic working principle. However, the hydraulic control valve and bidirectional gear pump in the existing drive control assembly are mainly integrated with the hydraulic cylinder. When the hydraulic control valve needs maintenance, the entire device must be disassembled, making it impossible to repair the damaged drive control assembly separately. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a drive control assembly for an electro-hydraulic integrated push rod, which can realize the separate connection between the drive control assembly and the hydraulic cylinder, thereby enabling separate maintenance of the drive control assembly.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] An electro-hydraulic integrated actuator drive control assembly includes a drive module, a valve block, an oil tank assembly, and a PLC controller. The valve block is installed at the rear end of the oil tank assembly. The drive module includes a drive motor, which is located at the rear end of the valve block. The controlled end of the drive motor is connected to the output end of the PLC controller. The motor shaft of the drive motor passes through the center of the valve block and is connected to a bidirectional gear pump, which is located inside the oil tank assembly. The front end of the oil tank assembly is provided with a mounting flange for easy connection to a hydraulic cylinder, and the rear end of the oil tank assembly is provided with a lug for easy connection to the valve block.

[0007] The aforementioned electro-hydraulic integrated actuator drive control assembly includes an oil tank assembly comprising an oil tank body with an inner cavity at its center. Two oil supply pipes are provided on the side wall of the oil tank body, with their outlets connected to oil pipes on a hydraulic cylinder and their inlets connected to a valve block. An oil suction pipe connected to a bidirectional gear pump is provided on the side wall of the oil tank body, with the other end of the suction pipe connected to the valve block.

[0008] In the aforementioned electro-hydraulic integrated actuator drive control assembly, a base plug is provided at the front end of the oil tank cavity, and a piston is installed on the inner side of the oil tank cavity near the base plug. The piston and the base plug are connected by a spring.

[0009] The aforementioned electro-hydraulic integrated actuator drive control assembly further includes an oil tank inlet pipe and an oil tank vent seat that communicate with the inner cavity of the oil tank on the side wall of the main body of the oil tank, and the oil tank inlet pipe is connected to the oil tank.

[0010] The aforementioned electro-hydraulic integrated actuator drive control assembly includes a valve block comprising a valve block body. The front end of the valve block body is provided with a threaded connector that is threadedly connected to the inner wall of the rear end of the oil tank body. An oil inlet is provided on the end face of the threaded connector, communicating with an oil suction pipe on the side wall of the oil tank body. An oil outlet is provided on the end face of the valve block body, communicating with an oil supply pipe in the oil tank. The oil inlet and oil outlet are respectively connected by a valve block oil supply pipe provided on the valve block body. An overflow pipe is also provided inside the valve block body, communicating with the inner cavity of the oil tank.

[0011] The aforementioned electro-hydraulic integrated actuator drive control assembly includes a pressure sensor and a hydraulic connector mounted on the top surface of the valve block body. A second check valve, a third relief valve, a second hydraulically controlled check valve, and a third hydraulically controlled check valve are mounted on the front side of the valve block body, while a first relief valve, a first check valve, a second relief valve, and a first hydraulically controlled check valve are mounted on the rear side of the valve block body. The output terminal of the pressure sensor is connected to the input terminal of the PLC controller, and the controlled terminals of the first relief valve, the first check valve, the second relief valve, the first hydraulically controlled check valve, the second check valve, the third relief valve, the second hydraulically controlled check valve, and the third hydraulically controlled check valve are respectively connected to the output terminals of the PLC controller.

[0012] In the aforementioned electro-hydraulic integrated actuator drive control assembly, the inlet of the first check valve is connected to the inner cavity of the oil tank, the outlet of the first check valve is connected to the left inlet of the bidirectional gear pump, the left outlet of the bidirectional gear pump is connected to the left oil flow path, and the left oil flow path consists of the left valve block oil supply pipe inside the valve block, the left oil tank oil supply pipe, and the left long oil pipe inside the hydraulic cylinder; the second overflow valve is installed on the left overflow pipe connecting the left oil flow path and the inner cavity of the oil tank.

[0013] In the aforementioned electro-hydraulic integrated actuator drive control assembly, the oil inlet of the second check valve is connected to the inner cavity of the oil tank, the oil outlet of the second check valve is connected to the right oil inlet of the bidirectional gear pump, the right oil outlet of the bidirectional gear pump is connected to the right oil flow path, and the right oil flow path consists of the right valve block oil supply pipe, the right oil tank oil supply pipe, and the right short oil pipe inside the hydraulic cylinder; the second hydraulically controlled check valve and the third hydraulically controlled check valve are sequentially arranged on the right oil flow path.

[0014] In the aforementioned electro-hydraulic integrated actuator drive control assembly, the first overflow valve is disposed on the right high-pressure overflow pipe connecting the right oil flow path and the inner cavity of the oil tank, and the right high-pressure overflow pipe is disposed on the right oil flow path located at the front end of the third hydraulic control check valve along the oil delivery direction; the third overflow valve is disposed on the right low-pressure overflow pipe connecting the right oil flow path and the inner cavity of the oil tank, and the right low-pressure overflow pipe is disposed on the right oil flow path near the right oil outlet of the bidirectional gear pump along the oil delivery direction.

[0015] In the aforementioned electro-hydraulic integrated actuator drive control assembly, the right-side oil flow path is connected to the inner cavity of the oil tank via a branch pipe, and a first hydraulic check valve is installed on the branch pipe, which is located in front of the right-side low-pressure overflow pipeline along the oil delivery direction.

[0016] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0017] This utility model provides a drive control assembly for an electro-hydraulic integrated actuator. By setting a mounting flange at the front end of the oil tank assembly for detachable connection with the hydraulic cylinder, and setting an ear plate at the rear end of the oil tank assembly for connection with the valve block, assembly and disassembly are convenient, realizing separate connection between various components, which facilitates subsequent maintenance. Furthermore, valves such as check valves, hydraulically controlled check valves, and relief valves are installed on the valve block to achieve balance and stability of the oil in the inner cavity of the cylinder on both sides of the right end of the piston rod when the piston rod moves. It also works in conjunction with the oil tank vent seat to release air in a timely manner, avoiding damage to the oil tank assembly due to excessive pressure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the specific structure of the present utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0020] Figure 3 This is a side view of the fuel tank assembly described in this utility model;

[0021] Figure 4 for Figure 3 Sectional view along line AA in the middle;

[0022] Figure 5 for Figure 3 BB-direction sectional view in the middle;

[0023] Figure 6 This is a partial cross-sectional view of the fuel tank assembly described in this utility model;

[0024] Figure 7 This is a schematic diagram of the specific structure of the valve block described in this utility model;

[0025] Figure 8This is a schematic diagram of the specific structure of the top surface of the valve block described in this utility model;

[0026] Figure 9 This is a cross-sectional view of the internal structure of the valve block described in this utility model;

[0027] Figure 10 This is a schematic diagram of the specific structure of the front side of the valve block described in this utility model;

[0028] Figure 11 This is a schematic diagram of the specific structure of the rear side of the valve block described in this utility model;

[0029] Figure 12 This is a schematic diagram illustrating the working principle of the valve block described in this utility model.

[0030] Among them: 210. Drive module, 2100. Drive motor, 2101. Coupling, 2102. Bidirectional gear pump;

[0031] 220. Valve block; 2200. Valve block body; 2201. Threaded connector; 2202. Motor shaft through hole; 2203. Oil inlet; 2204. Oil outlet; 2205. Pressure sensor; 2206. Hydraulic connector; 2207. Valve block oil supply pipe; 2208. Overflow pipe; 2209. First overflow valve; 2210. First check valve; 2211. Second overflow valve; 2212. First hydraulically controlled check valve; 2213. Second check valve; 2214. Third overflow valve; 2215. Second hydraulically controlled check valve; 2216. Third hydraulically controlled check valve;

[0032] 230. Fuel tank assembly; 2300. Fuel tank body; 2301. Fuel tank inner cavity; 2302. Fuel suction pipe; 2303. Foot; 2304. Fuel tank fuel delivery pipe; 2305. Fuel tank fuel inlet pipe; 2306. Fuel tank exhaust seat; 2307. Ear plate; 2308. Exhaust port;

[0033] 240. Base plug, 250. Piston, 260. Spring. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] An electro-hydraulic integrated actuator drive control assembly, such as Figures 1 to 12 As shown, it includes a drive module 210, a valve block 220, an oil tank assembly 230, and a PLC controller. The valve block 220 is installed at the tail end of the oil tank assembly 230.

[0036] The drive module 210 includes a drive motor 2100. The motor shaft of the drive motor 2100 is connected to a bidirectional gear pump 2102 via a coupling 2101. The bidirectional gear pump 2102 is located inside the oil tank assembly 230. The drive motor 2100 drives the bidirectional gear pump 2102 to achieve the transportation of oil inside the oil tank assembly.

[0037] The drive motor 2100 is located at the rear end of the valve block 220. The motor shaft of the drive motor 2100 passes through the center of the valve block 220 and is connected to the bidirectional gear pump 2102. The controlled end of the drive motor 2100 is connected to the output end of the PLC controller.

[0038] The oil tank assembly 230 includes an oil tank body 2300, an oil tank cavity 2301 is provided at the center of the oil tank body 2300, and a mounting flange is provided at the front end of the oil tank body 2300 for easy connection with the hydraulic cylinder.

[0039] Two feet 2303 are provided on the outside of the fuel tank body 2300 to support the fuel tank body 2300.

[0040] The rear end of the oil tank body 2300 is provided with a lug plate 2307 for easy connection with the valve block 220. The lug plate 2307 is connected to the valve block 220 by a bolt assembly.

[0041] Two oil tank supply pipes 2304 are provided on the side wall of the oil tank body 2300, which are arranged opposite to each other. The oil outlet of the oil tank supply pipe 2304 is connected to the oil pipe on the hydraulic cylinder, and the oil inlet of the oil tank supply pipe 2304 is connected to the valve block 220, which is used to supply oil to the hydraulic cylinder and drive the piston rod to move.

[0042] An oil suction pipe 2302 connected to a bidirectional gear pump 2102 is provided on the side wall of the oil tank body 2300. The other end of the oil suction pipe 2302 is connected to a valve block 220, which facilitates the delivery of oil in the inner cavity 2301 of the oil tank to the bidirectional gear pump 2102, and then to the oil tank delivery pipe 2304 via the valve block 220.

[0043] The side wall of the main body 2300 of the oil tank is also provided with an oil tank inlet pipe 2305 and an oil tank vent seat 2306 that are connected to the inner cavity 2301 of the oil tank. The oil tank inlet pipe 2305 is connected to the oil tank and is used to deliver oil to the inner cavity of the oil tank. The oil tank vent seat 2306 is used to balance the pressure in the inner cavity of the oil tank.

[0044] A base plug 240 is provided at the front end of the inner cavity 2301 of the oil tank to seal the inner cavity of the oil tank. A piston 250 is installed on the inner side of the inner cavity 2301 of the oil tank near the base plug 240. The piston 250 and the base plug 240 are connected by a spring 260.

[0045] An exhaust port 2308 is provided on the side wall of the oil tank body 2300 located between the base plug 240 and the piston 250, which can balance the pressure on both sides of the piston when the piston moves.

[0046] The valve block 220 includes a valve block body 2200. The front end of the valve block body 2200 is provided with a threaded joint 2201 that is threaded to the inner wall of the tail end of the oil tank body 2300. The valve block body 2200 and the threaded joint 2201 are provided with a motor shaft through hole 2202 through which the motor shaft passes.

[0047] The threaded connector 2201 has an oil inlet 2203 on its end face that communicates with the oil suction pipe 2302 on the side wall of the oil tank body. The valve block body 2200 has an oil outlet 2204 on its end face that communicates with the oil tank oil supply pipe 2304. The oil inlet 2203 and the oil outlet 2204 are connected by a valve block oil supply pipe 2207 on the valve block body 2200.

[0048] The valve block body 2200 is also provided with an overflow pipe 2208, which is connected to the inner cavity 2301 of the oil tank, so as to facilitate the delivery of overflowing oil to the inner cavity 2301 of the oil tank.

[0049] A pressure sensor 2205 and a hydraulic connector 2206 are installed on the top surface of the valve block body 2200. The output end of the pressure sensor 2205 is connected to the input end of the PLC controller. The pressure sensor 2205 is used to detect the oil circuit pressure so as to control the relief valve to release pressure in a timely manner.

[0050] The front side of the valve block body 2200 is equipped with a second check valve 2213, a third overflow valve 2214, a second hydraulically controlled check valve 2215, and a third hydraulically controlled check valve 2216.

[0051] The valve block body 2200 is equipped with a first overflow valve 2209, a first check valve 2210, a second overflow valve 2211, and a first hydraulic check valve 2212.

[0052] The inlet of the first check valve 2210 is connected to the inner cavity 2301 of the oil tank, the outlet of the first check valve 2210 is connected to the left inlet of the bidirectional gear pump 2102, and the left outlet of the bidirectional gear pump 2102 is connected to the left oil flow path.

[0053] The left-side oil flow route consists of the left-side valve block oil supply pipe 2207 inside the valve block 220, the left-side oil tank oil supply pipe, and the oil pipe inside the hydraulic cylinder, and is used to supply oil to the rod chamber on the front side of the piston block at the right end of the piston rod.

[0054] The second overflow valve 2211 is installed on the left overflow pipe 2208 that connects the left oil flow path with the inner cavity 2301 of the oil tank.

[0055] The oil inlet of the second check valve 2213 is connected to the inner cavity 2301 of the oil tank, and the oil outlet of the second check valve 2213 is connected to the right oil inlet of the bidirectional gear pump 2102. The right oil outlet of the bidirectional gear pump 2102 is connected to the right oil flow path.

[0056] The right-side oil flow path consists of the right-side valve block oil supply pipe 2207, the right-side oil tank oil supply pipe, and the right-side short oil pipe inside the hydraulic cylinder. The second hydraulic control check valve 2215 and the third hydraulic control check valve 2216 are sequentially installed on the right-side oil flow path.

[0057] The first overflow valve 2209 is installed on the right high-pressure overflow pipeline 2208 that connects the right oil flow path with the inner cavity 2301 of the oil tank.

[0058] The right-side high-pressure overflow pipeline 2208 is located on the right-side oil flow path at the front end of the third hydraulic control check valve 2216 along the oil delivery direction, so that the oil can be discharged in time when the oil pressure is too high, without waiting for the hydraulic control check valve to open.

[0059] The third overflow valve 2214 is installed on the right low-pressure overflow pipe 2208 that connects the right oil flow path with the inner cavity 2301 of the oil tank. The right low-pressure overflow pipe 2208 is installed on the right oil flow path near the right oil outlet of the bidirectional gear pump along the oil delivery direction.

[0060] The oil flow path on the right side is connected to the inner cavity 2301 of the oil tank through a branch pipe. The first hydraulic check valve 2212 is installed on the branch pipe, which is located in front of the low-pressure overflow pipeline 2208 on the right side along the oil delivery direction.

[0061] The controlled terminals of the first overflow valve 2209, the first check valve 2210, the second overflow valve 2211, the first hydraulically controlled check valve 2212, the second check valve 2213, the third overflow valve 2214, the second hydraulically controlled check valve 2215, and the third hydraulically controlled check valve 2216 are respectively connected to the output terminals of the PLC controller.

[0062] When the drive motor 2100 drives the bidirectional gear pump 2102 to operate, the bidirectional gear pump converts the oil in the oil tank assembly into high-pressure oil and sends it into the valve block 220 through the oil suction pipe 2301. The oil flow direction is regulated and balanced through the internal pipeline of the valve block 220 and the cooperation of check valve, relief valve, etc., thereby controlling the movement of the hydraulic cylinder piston rod.

[0063] The working principle of valve block 220 during the operation of the hydraulic cylinder is as follows (for reference). Figure 12 :

[0064] When it is necessary to push the hydraulic cylinder piston rod to the right and retract the piston rod, the bidirectional gear pump 2102 draws oil from the inner cavity 2301 of the oil tank through the first one-way valve 2210, converts it into high-pressure oil, and sends it into the inner cavity of the cylinder on the front side of the piston block at the right end of the piston rod through the oil tank oil supply pipe 2304. The oil in the inner cavity of the cylinder on the rear side of the piston block at the right end of the piston rod will flow to the overflow pipe 2208 through the oil tank oil supply pipe 2304.

[0065] When the pressure sensor 2205 detects that the oil pressure in the cylinder cavity behind the piston block at the right end of the piston rod exceeds 30MPa, it controls the first overflow valve 2209 to work and send the discharged oil to the oil tank cavity 2301.

[0066] When the pressure sensor 2205 detects that the oil pressure in the cylinder cavity behind the piston block at the right end of the piston rod is lower than 30MPa and higher than 4MPa, the first relief valve 2209 is not in operation. At this time, pressurized oil is supplied to the second hydraulic check valve 2215 and the third hydraulic check valve 2216 respectively to open the second hydraulic check valve 2215 and the third hydraulic check valve 2216. Figure 12 The dotted line indicates the pressure oil delivery circuit. At this time, the third overflow valve 2214 is controlled to work, and the discharged oil is sent to the inner cavity 2301 of the oil tank.

[0067] When the pressure sensor 2205 detects that the oil pressure in the cylinder cavity behind the piston block at the right end of the piston rod is lower than 4MPa, neither the first relief valve 2209 nor the third relief valve 2214 is in working condition. At this time, pressurized oil is supplied to the first hydraulic control check valve 2212, the second hydraulic control check valve 2215, and the third hydraulic control check valve 2216 respectively to open the first hydraulic control check valve 2212, the second hydraulic control check valve 2215, and the third hydraulic control check valve 2216. Since the first hydraulic control check valve 2212 is directly connected to the inner cavity 2301 of the oil tank through the pipeline, the discharged oil will flow directly into the inner cavity 2301 of the oil tank.

[0068] When it is necessary to push the hydraulic cylinder piston rod to the left and extend the piston rod, the bidirectional gear pump 2102 draws oil from the inner cavity 2301 of the oil tank through the second check valve 2213 and converts it into high-pressure oil. The oil then passes through the second hydraulic control check valve 2215 and the third hydraulic control check valve 2216, and is sent through the oil tank oil supply pipe 2304 into the inner cavity of the cylinder behind the piston block at the right end of the piston rod. The oil in the inner cavity of the cylinder in front of the piston block at the right end of the piston rod will flow through the oil tank oil supply pipe 2304 to the overflow pipe 2208, so that the oil is delivered to the inner cavity of the oil tank through the second overflow valve 2211.

[0069] This utility model provides a drive control assembly for an electro-hydraulic integrated actuator. By setting a mounting flange at the front end of the oil tank assembly for detachable connection with the hydraulic cylinder, and setting an ear plate at the rear end of the oil tank assembly for connection with the valve block, assembly and disassembly are convenient, realizing separate connection between various components, which facilitates subsequent maintenance. Furthermore, valves such as check valves, hydraulically controlled check valves, and relief valves are installed on the valve block to achieve balance and stability of the oil in the inner cavity of the cylinder on both sides of the right end of the piston rod when the piston rod moves. It also works in conjunction with the oil tank vent seat to release air in a timely manner, avoiding damage to the oil tank assembly due to excessive pressure.

Claims

1. A drive control assembly for an electro-hydraulic integrated linear actuator, characterized in that: The system includes a drive module (210), a valve block (220), an oil tank assembly (230), and a PLC controller. The valve block (220) is installed at the rear end of the oil tank assembly (230). The drive module (210) includes a drive motor (2100), which is located at the rear end of the valve block (220). The controlled end of the drive motor (2100) is connected to the output end of the PLC controller. The motor shaft of the drive motor (2100) passes through the center of the valve block (220) and is connected to a bidirectional gear pump (2102). The bidirectional gear pump (2102) is located inside the oil tank assembly (230). The front end of the oil tank assembly (230) is provided with a mounting flange for easy connection to a hydraulic cylinder, and the rear end of the oil tank assembly (230) is provided with a lug plate (2307) for easy connection to the valve block (220).

2. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 1, characterized in that: The oil tank assembly (230) includes an oil tank body (2300), an oil tank cavity (2301) is provided in the center of the oil tank body (2300), and two oil tank supply pipes (2304) are provided on the side wall of the oil tank body (2300) and are arranged opposite to each other. The oil outlet of the oil tank supply pipe (2304) is connected to the oil pipe on the hydraulic cylinder, and the oil inlet of the oil tank supply pipe (2304) is connected to the valve block (220). The oil tank body (2300) has a suction pipe (2302) connected to the bidirectional gear pump (2102) on the side wall, and the other end of the suction pipe (2302) is connected to the valve block (220).

3. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 2, characterized in that: A base plug (240) is provided at the front end of the inner cavity (2301) of the oil tank. A piston (250) is installed on the inner side of the inner cavity (2301) of the oil tank near the base plug (240). The piston (250) and the base plug (240) are connected by a spring (260).

4. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 2, characterized in that: The oil tank body (2300) is also provided with an oil tank inlet pipe (2305) and an oil tank vent seat (2306) that are connected to the oil tank cavity (2301) on the side wall. The oil tank inlet pipe (2305) is connected to the oil tank.

5. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 2, characterized in that: The valve block (220) includes a valve block body (2200), and a threaded connector (2201) is provided at the front end of the valve block body (2200) and threadedly connected to the inner wall of the tail end of the oil tank body (2300). An oil inlet (2203) is provided on the end face of the threaded connector (2201) and communicates with the oil suction pipe (2302) on the side wall of the oil tank body. An oil outlet (2204) is provided on the end face of the valve block body (2200) and communicates with the oil tank oil delivery pipe (2304). The oil inlet (2203) and the oil outlet (2204) are respectively connected by a valve block oil delivery pipe (2207) provided on the valve block body (2200). An overflow pipe (2208) is also provided inside the valve block body (2200) and communicates with the inner cavity of the oil tank (2301).

6. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 5, characterized in that: A pressure sensor (2205) and a hydraulic connector (2206) are installed on the top surface of the valve block body (2200). A second check valve (2213), a third relief valve (2214), a second hydraulically controlled check valve (2215), and a third hydraulically controlled check valve (2216) are installed on the front side of the valve block body (2200). A first relief valve (2209), a first check valve (2210), a second relief valve (2211), and a third hydraulically controlled check valve (2216) are installed on the rear side of the valve block body (2200). A hydraulically controlled check valve (2212); the output end of the pressure sensor (2205) is connected to the input end of the PLC controller, and the controlled ends of the first relief valve (2209), the first check valve (2210), the second relief valve (2211), the first hydraulically controlled check valve (2212), the second check valve (2213), the third relief valve (2214), the second hydraulically controlled check valve (2215), and the third hydraulically controlled check valve (2216) are respectively connected to the output end of the PLC controller.

7. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 6, characterized in that: The inlet of the first check valve (2210) is connected to the inner cavity of the oil tank (2301), the outlet of the first check valve (2210) is connected to the left inlet of the bidirectional gear pump (2102), the left outlet of the bidirectional gear pump (2102) is connected to the left oil flow path, and the left oil flow path is composed of the left valve block oil supply pipe (2207) inside the valve block (220), the left oil tank oil supply pipe, and the left long oil pipe inside the hydraulic cylinder; the second overflow valve (2211) is set on the left overflow pipe (2208) that connects the left oil flow path and the inner cavity of the oil tank (2301).

8. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 6, characterized in that: The oil inlet of the second check valve (2213) is connected to the inner cavity (2301) of the oil tank, and the oil outlet of the second check valve (2213) is connected to the right oil inlet of the bidirectional gear pump (2102). The right oil outlet of the bidirectional gear pump (2102) is connected to the right oil flow path. The right oil flow path consists of the right valve block oil supply pipe (2207), the right oil tank oil supply pipe, and the right short oil pipe inside the hydraulic cylinder. The second hydraulic control check valve (2215) and the third hydraulic control check valve (2216) are sequentially arranged on the right oil flow path.

9. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 8, characterized in that: The first overflow valve (2209) is installed on the right high-pressure overflow pipe (2208) that connects the right oil flow path to the inner cavity of the oil tank (2301). The right high-pressure overflow pipe (2208) is installed on the right oil flow path located at the front end of the third hydraulic control check valve (2216) along the oil delivery direction. The third overflow valve (2214) is installed on the right low-pressure overflow pipe (2208) that connects the right oil flow path to the inner cavity of the oil tank (2301). The right low-pressure overflow pipe (2208) is installed on the right oil flow path near the right oil outlet of the bidirectional gear pump along the oil delivery direction.

10. The drive control assembly for an electro-hydraulic integrated linear actuator according to claim 8, characterized in that: The right-side oil flow path is connected to the inner cavity of the oil tank (2301) through a branch pipe. The first hydraulic control check valve (2212) is installed on the branch pipe, which is located in front of the right-side low-pressure overflow pipeline (2208) along the oil delivery direction.

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