A flat tail actuating cylinder disassembly and assembly tool and a method of using the same

Abstract

The present application relates to the technical field of aircraft repair process, in particular to a horizontal tail actuating cylinder disassembly and assembly tool and its using method, the tool includes a tool main body with a control panel, the tool main body includes a working frame trolley, the top of the working frame trolley is provided with an upper panel, the right side of the upper panel is provided with two oil cylinders which are symmetrical in front and back and arranged along the left and right directions, the control panel is provided with a pressure regulating switch, a working switch, a working pressure gauge, an indicator light, a start button, a stop button, an emergency stop button and a reversing valve knob; a hydraulic system is arranged on the working frame trolley; an electrical system is arranged on the working frame trolley.The present application solves the problem of difficult disassembly and assembly of multi-seal device piston assembly, improves product repair quality, improves work efficiency, realizes real-time monitoring of sudden situations, meets the bidirectional needs of disassembly and assembly, and ensures that the piston rod is stressed smoothly during the operation process, and is not easy to cause inclination or side deviation.

Description

Technical Field

[0001] This invention relates to the field of aircraft repair technology, specifically to a horizontal stabilizer actuator disassembly and assembly tooling and its usage method. Background Technology

[0002] The horizontal stabilizer actuator is a crucial component in modern aircraft flight control systems. This type of actuator features a redundant hydraulic design, ensuring reliable operation. The horizontal stabilizer actuator controls aircraft flight by simultaneously receiving oil from multiple hydraulic systems. The piston rod assembly, a core component of this type of product, plays a vital role in its functionality, and its performance significantly impacts the stability of the horizontal stabilizer actuator. During repairs, it was discovered that due to the high hydraulic redundancy of the actuator, the numerous hydraulic chambers involved, and the multiple sealing devices isolating these chambers, disassembling or assembling the piston rod assembly requires a substantial and stable force. Manual disassembly and assembly are difficult, and the loading device can easily damage the sealing devices. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a disassembly and assembly fixture for a flat-tail actuator and its usage method. This fixture enables the disassembly and assembly of the flat-tail actuator, improving work efficiency and ensuring product repair quality.

[0004] The technical problem to be solved by this invention is achieved by the following technical solution:

[0005] A disassembly and assembly fixture for a flat-tail actuator includes:

[0006] The tooling body includes a work trolley with an operating panel. The top of the work trolley is provided with an upper panel. On the right side of the upper panel, there are two hydraulic cylinders arranged symmetrically in the front and back and in the left and right directions. Between the two hydraulic cylinders, there are two clamping devices and mounting supports arranged in the left and right directions. The left ends of the two hydraulic cylinders are connected to crossbars. The operating panel is provided with a pressure regulating switch, a working switch, a working pressure gauge, an indicator light, a start button, a stop button, an emergency stop button, and a reversing valve knob.

[0007] A hydraulic system is installed on the work frame vehicle. The hydraulic system includes an oil tank located on the right side inside the work frame vehicle, a vane pump and a hand pump connected to the oil tank via pipelines, an oil filter connected to the vane pump and the hand pump via pipelines, an electromagnetic reversing valve connected to the oil filter via pipelines, and a tapered pipe joint connected to the electromagnetic reversing valve via pipelines. The tapered pipe joint is connected to two oil cylinders via hoses. The pressure regulating switch, working switch, and working pressure gauge are connected via pipelines between the oil filter and the electromagnetic reversing valve.

[0008] An electrical system is installed on the work frame vehicle. The electrical system includes a switching power supply, a three-position selector switch connected to the switching power supply circuit, a power conversion switch, a thermal relay connected to the power conversion switch circuit, and a motor connected to the thermal relay circuit. The indicator light, start button, stop button, and emergency stop button are connected to the switching power supply circuit respectively. The three-position selector switch is connected to the reversing valve knob and the solenoid reversing valve circuit respectively. The motor is located on the left side inside the work frame vehicle and is connected to the vane pump.

[0009] Preferably, the work frame is provided with four support components around its bottom.

[0010] Preferably, the hydraulic system further includes two check valves connected by pipelines between the vane pump, the hand pump and the oil filter, a safety relief valve connected by pipelines between the oil filter and the solenoid directional valve, and a one-way throttle valve connected by pipelines between the solenoid directional valve and the tapered pipe joint.

[0011] Preferably, the oil tank is connected to an air filter and an external level gauge is installed.

[0012] Preferably, the hand pump is connected to a hand pump extension rod, which is located on the outside right side of the work frame vehicle.

[0013] Preferably, the electrical system further includes a fuse connected between the switching power supply and the three-position selector switch, a contactor connected between the start button and the switching power supply, and two circuit breakers connected to the switching power supply and the power selection switch circuit.

[0014] Preferably, the two circuit breakers are connected to corresponding sockets.

[0015] Preferably, the reversing valve knob and the three-position selector switch include three positions: extend, stop, and retract.

[0016] A method for using a flat-tail actuator cylinder disassembly and assembly fixture, comprising automatic and manual operation, wherein the specific steps of the automatic operation are as follows:

[0017] 1. After inserting the crossbar into the lug connector at the protruding end of the flat tail actuator, fix the flat tail actuator to the upper plate of the work frame vehicle using the clamping device and mounting bracket.

[0018] 2. Connect the socket to the power supply, press the start button, the indicator light will light up, the motor will drive the vane pump to run, and select the flat tail actuator piston rod to extend or retract as needed for disassembly or assembly.

[0019] 3. When it is necessary to extend the piston rod of the flat tail actuator: rotate the reversing valve knob to the extension position, switch the corresponding three-position switch to the extension position, transmit the signal to the solenoid reversing valve, the solenoid reversing valve switches the oil flow direction, the oil flows through the oil tank along the pipeline through the tapered pipe joint into the two oil cylinders, and the two oil cylinders extend the piston rod of the flat tail actuator through the crossbar.

[0020] 4. When the piston rod of the flat tail actuator needs to be retracted: Rotate the reversing valve knob to the retraction position, switch the corresponding three-position switch to the retraction position, and transmit the signal to the solenoid reversing valve. The solenoid reversing valve switches the oil flow direction, and the oil flows through the oil tank, along the pipeline, and enters the two oil cylinders through the tapered pipe joint. The two oil cylinders retract the piston rod of the flat tail actuator through the crossbar.

[0021] 5. Press the stop button, the motor will stop running, the hydraulic cylinder will stop working, the reversing valve knob will be rotated to the stop position, and the corresponding three-gear selector switch will be switched to the stop position;

[0022] 6. During the extension or retraction of the piston rod of the flat-tail actuator, the amount of oil entering and exiting is controlled by a one-way throttle valve to control the extension or retraction speed of the piston rod of the flat-tail actuator.

[0023] Preferably, the specific steps for manual operation are as follows:

[0024] 1. After inserting the crossbar into the lug connector at the protruding end of the flat tail actuator, fix the flat tail actuator to the upper plate of the work frame vehicle using the clamping device and mounting bracket.

[0025] 2. Select the extension or retraction of the flat-tail actuator piston rod according to the needs of disassembly or assembly;

[0026] 3. When it is necessary to extend the piston rod of the flat-tail actuator: rotate the reversing valve knob to the extended position, switch the corresponding three-position switch to the extended position, and transmit the signal to the solenoid reversing valve. The solenoid reversing valve switches the oil flow direction. Then, manually crank the extension rod of the hand pump to drive the hand pump to operate. The oil flows through the oil tank along the pipeline and enters the two oil cylinders through the tapered pipe joint. The two oil cylinders push out the piston rod of the flat-tail actuator through the crossbar.

[0027] 4. When it is necessary to retract the piston rod of the flat-tail actuator: Rotate the reversing valve knob to the retraction position, switch the corresponding three-position switch to the retraction position, and transmit the signal to the solenoid reversing valve. The solenoid reversing valve switches the direction of oil flow. Then, manually crank the extension rod of the hand pump to drive the hand pump to operate. The oil flows through the oil tank along the pipeline and enters the two oil cylinders through the tapered pipe joint. The two oil cylinders retract the piston rod of the flat-tail actuator through the crossbar.

[0028] 5. Stop cranking the extension rod of the hand pump. The hand pump and oil cylinder will stop working. Rotate the reversing valve knob to the stop position and switch the corresponding three-speed selector switch to the stop position.

[0029] The beneficial effects of this invention are:

[0030] This invention provides a disassembly and assembly fixture for a flat-tail actuator and its usage method, solving the problem of difficult disassembly and assembly of piston assemblies with multiple sealing devices, and improving product repair quality. It employs a servo motor-driven vane pump to supply pressure to the servo valve system, enabling the output of larger torque and more stable displacement, thus improving work efficiency. Simultaneously, a hand-cranked pump is used for pressure supply; when the servo system malfunctions or requires finer and more precise control of the hydraulic cylinder output, the hand-cranked pump can be used to supply oil to the equipment. A working pressure gauge is added to the equipment's hydraulic circuit to monitor the hydraulic pressure in real time, ensuring the equipment is in a stable working state and enabling real-time monitoring of emergencies. To meet the dual needs of disassembly and assembly, an electromagnetic directional valve is added to the hydraulic circuit to control the flow of hydraulic oil in the cylinder, achieving control of the extension and retraction of the hydraulic cylinder. A dual hydraulic cylinder design is adopted, with both hydraulic cylinders simultaneously driving the piston rod assembly during disassembly or assembly, ensuring stable force on the piston rod during operation and preventing tilting or lateral deviation. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Figure 1 This is a schematic diagram of the main structure of the tooling body of the present invention;

[0033] Figure 2 This is a top view of the main body of the tooling of the present invention;

[0034] Figure 3 This is a schematic diagram of the hydraulic system of the present invention;

[0035] Figure 4 This is a schematic diagram of the electrical system of the present invention.

[0036] In the diagram: 1. Work frame; 2. Support assembly; 3. Top panel; 4. Hydraulic cylinder; 5. Crossbar; 6. Clamping device; 7. Mounting support; 8. Pressure regulating switch; 9. Working switch; 10. Working pressure gauge; 11. Indicator light; 12. Start button; 13. Stop button; 14. Emergency stop button; 15. Reversing valve knob; 16. Oil tank; 17. Vane pump; 18. Hand pump; 19. Oil filter; 20. Electromagnetic converter 21. Check valve; 22. Tapered pipe joint; 23. Hose; 24. One-way valve; 25. Safety relief valve; 26. One-way throttle valve; 27. Air filter; 28. Level gauge; 29. ​​Hand pump extension rod; 30. Switching power supply; 31. Three-position selector switch; 32. Power conversion switch; 33. Thermal relay; 34. Motor; 35. Fuse; 36. Contactor; 37. Circuit breaker; 38. Socket; 39. Control panel. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] like Figures 1 to 4 As shown, a flat-tail actuator disassembly and assembly fixture consists of a fixture body, a hydraulic system, and an electrical system.

[0039] Furthermore, the main body of the tooling includes a work frame 1, four support components 2, an upper panel 3, two hydraulic cylinders 4, a crossbar 5, two clamping devices 6, a mounting bracket 7, an operating panel 38, a pressure regulating switch 8, a working switch 9, a working pressure gauge 10, an indicator light 11, a start button 12, a stop button 13, an emergency stop button 14, and a reversing valve knob 15.

[0040] Specifically, four support components 2 are bolted to the bottom of the work frame 1, and the work frame 1 is fixed by the four support components 2. The upper panel 3 is fixed to the top of the work frame 1 with screws. Two hydraulic cylinders 4 are symmetrically mounted on the front and back and fixed to the right side of the upper panel 3. Compared with a single hydraulic cylinder driving the product, which is prone to uneven force distribution and damage to the product or shearing of the rubber ring, the symmetrical double hydraulic cylinder design ensures uniform force distribution on the product and avoids damage during product repair. The crossbar 5 is distributed in the front and back direction and its two ends are connected to the telescopic ends of the two hydraulic cylinders 4. Two clamping devices 6 and mounting supports 7 are fixedly mounted on the upper panel 3 and located between the two hydraulic cylinders 4. The two clamping devices 6 and mounting supports 7 are distributed in the left and right direction. The control panel 38 is located on the front side of the work frame 1. The pressure regulating switch 8, the working switch 9, the working pressure gauge 10, the indicator light 11, the start button 12, the stop button 13, the emergency stop button 14, and the reversing valve knob 15 are correspondingly installed on the control panel 38. The reversing valve knob 15 has three switching positions: extended, stopped, and retracted.

[0041] Furthermore, the hydraulic system includes an oil tank 16, a vane pump 17, a hand pump 18, an oil filter 19, a solenoid directional valve 20, a tapered pipe joint 21, a hose 22, two check valves 23, a safety relief valve 24, two one-way throttle valves 25, an air filter 26, a level gauge 27, and a hand pump extension rod 28.

[0042] Specifically, the oil tank 16 is located inside the work frame 1 on the right side and is fixedly installed by an oil tank bracket; the vane pump 17 and the hand-cranked pump 18 are respectively connected to the oil filter 19; the two one-way valves 23 are connected between the vane pump 17 and the oil filter 19, and between the hand-cranked pump 18 and the oil filter 19; the oil filter 19 is connected to the solenoid directional valve 20; the safety relief valve 24 is connected between the oil filter 19 and the solenoid directional valve 20; in addition, the pressure regulating switch 8, the working switch 9, and the working pressure gauge 10 are connected between the oil filter 19 and the solenoid directional valve 20. The working pressure gauge 10 can monitor the system inlet oil pressure in real time and control whether the product disassembly and installation are normal. The solenoid directional valve 20 can control the hydraulic oil flow direction to control the extension or retraction of the cylinder 4, meeting the dual needs of disassembly and assembly. The tapered pipe joint 21 is connected to the two hydraulic cylinders 4 via the hose 22. Two one-way throttle valves 25 are connected via corresponding pipes between the electromagnetic directional valve 20 and the tapered pipe joint 21. The one-way throttle valves 25 control the hydraulic oil supply, thereby controlling the speed of the two hydraulic cylinders 4. The air filter 26 is connected to the oil tank 16. The level gauge 27 is located outside the oil tank 16 and is used to display the oil level. The hand pump extension rod 28 is connected to the hand pump 18.

[0043] Furthermore, the electrical system includes a switching power supply 29, a three-position selector switch 30, a power conversion switch 31, a thermal relay 32, a motor 33, a fuse 34, a contactor 35, two circuit breakers 36, and two sockets 37.

[0044] Specifically, the switching power supply 29 is connected to a socket 37, and a circuit breaker 36 is connected between the socket 37 and the switching power supply 29; the three-position selector switch 30 is connected to the switching power supply 29, the reversing valve knob 15 is electrically connected to the three-position selector switch 30, and the three-position selector switch 30 is electrically connected to the solenoid reversing valve 20. The three-position selector switch 30 includes three positions: extend, stop, and retract. The power selector switch 31 is connected to another socket 37, and another circuit breaker 36 is connected between the socket 37 and the power selector switch 31; the thermal relay 32 is electrically connected to the power selector switch 31, the motor 33 is electrically connected to the thermal relay 32, and the motor 33 is connected to the vane pump 17 via a coupling, and the motor 33 is equipped with a protective cover. The fuse 34 circuit is connected between the switching power supply 29 and the three-position selector switch 30; the indicator light 11, start button 12, stop button 13, and emergency stop button 14 are connected to the switching power supply 29 circuit respectively; the contactor 35 circuit is connected between the start button 12 and the switching power supply 29.

[0045] A method for using a flat-tail actuator cylinder disassembly and assembly fixture, comprising automatic and manual operation, wherein the specific steps of the automatic operation are as follows:

[0046] 1. After inserting the crossbar 5 into the lug connector at the protruding end of the flat tail actuator, fix the flat tail actuator on the upper panel 3 of the work frame 1 through the clamping device 6 and the mounting bracket 7.

[0047] 2. Connect the socket 37 to the power supply, press the start button 12, the indicator light 11 will light up, the motor 33 will drive the vane pump 17 to run, and select the flat tail actuator piston rod to extend or retract as needed for disassembly or assembly.

[0048] 3. When it is necessary to extend the piston rod of the flat tail actuator: Rotate the reversing valve knob 15 to the extended position, switch the corresponding three-position switch 30 to the extended position, and transmit the signal to the solenoid reversing valve 20. The solenoid reversing valve 20 switches the oil flow direction, and the oil enters the two oil cylinders 4 through the oil tank 16, the pipeline, and the tapered pipe joint 21. The two oil cylinders 4 extend the piston rod of the flat tail actuator through the crossbar 5.

[0049] IV. When it is necessary to retract the piston rod of the flat tail actuator: Rotate the reversing valve knob 15 to the retraction position, and switch the corresponding three-position switch 30 to the retraction position. The signal is transmitted to the solenoid reversing valve 20, which switches the oil flow direction. The oil flows through the oil tank 16 along the pipeline and enters the two oil cylinders 4 through the tapered pipe joint 21. The two oil cylinders 4 retract the piston rod of the flat tail actuator through the crossbar 5.

[0050] 5. Press the stop button 13, the motor 33 stops running, the oil cylinder 4 stops working, the reversing valve knob 15 is rotated to the stop position, and the corresponding three-gear switch 30 is switched to the stop position;

[0051] VI. During the extension or retraction of the piston rod of the flat-tail actuator, the amount of oil entering and exiting is controlled by the one-way throttle valve 25 to control the extension or retraction speed of the piston rod of the flat-tail actuator.

[0052] The specific steps for manual operation are as follows:

[0053] 1. After inserting the crossbar 5 into the lug connector at the protruding end of the flat tail actuator, fix the flat tail actuator on the upper panel 3 of the work frame 1 through the clamping device 6 and the mounting bracket 7.

[0054] 2. Select the extension or retraction of the flat-tail actuator piston rod according to the needs of disassembly or assembly;

[0055] 3. When it is necessary to extend the piston rod of the flat-tail actuator: Rotate the reversing valve knob 15 to the extended position, and switch the corresponding three-position switch 30 to the extended position. The signal is transmitted to the solenoid reversing valve 20, which switches the oil flow direction. Then, manually crank the hand pump extension rod 28 to drive the hand pump 18 to operate. The oil flows through the oil tank 16 along the pipeline and enters the two oil cylinders 4 through the tapered pipe joint 21. The two oil cylinders 4 extend the piston rod of the flat-tail actuator through the crossbar 5.

[0056] IV. When it is necessary to retract the piston rod of the flat-tail actuator: Rotate the reversing valve knob 15 to the retraction position, and switch the corresponding three-position switch 30 to the retraction position. The signal is transmitted to the solenoid reversing valve 20, which switches the oil flow direction. Then, manually crank the hand pump extension rod 28 to drive the hand pump 18 to operate. The oil flows through the oil tank 16 along the pipeline and enters the two oil cylinders 4 through the tapered pipe joint 21. The two oil cylinders 4 retract the piston rod of the flat-tail actuator through the crossbar 5.

[0057] 5. When the hand pump extension rod 28 is stopped, the hand pump 18 and the oil cylinder 4 will stop working. The reversing valve knob 15 will be rotated to the stop position, and the corresponding three-speed switch 30 will be switched to the stop position.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely prisms of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A flat tail actuating cylinder disassembly assembly tool, characterized in that: include: The tooling body includes a work frame (1) with an operating panel (38). The top of the work frame (1) is provided with an upper panel (3). On the right side of the upper panel (3), there are two hydraulic cylinders (4) arranged symmetrically in front and behind and in the left and right directions. Between the two hydraulic cylinders (4), there are two clamping devices (6) and a mounting bracket (7) arranged in the left and right directions. The left end of the two hydraulic cylinders (4) is connected to a crossbar (5). The operating panel (38) is provided with a pressure regulating switch (8), a working switch (9), a working pressure gauge (10), an indicator light (11), a start button (12), a stop button (13), an emergency stop button (14), and a reversing valve knob (15). A hydraulic system is installed on the work frame vehicle (1). The hydraulic system includes an oil tank (16) located on the right side inside the work frame vehicle (1), a vane pump (17) and a hand pump (18) connected to the oil tank (16) by pipeline, an oil filter (19) connected to the vane pump (17) and the hand pump (18) by pipeline, an electromagnetic reversing valve (20) connected to the oil filter (19) by pipeline, and a tapered pipe joint (21) connected to the electromagnetic reversing valve (20) by pipeline. The tapered pipe joint (21) is connected to two oil cylinders (4) through a hose (22). The pressure regulating switch (8), the working switch (9), and the working pressure gauge (10) are connected between the oil filter (19) and the electromagnetic reversing valve (20). The electrical system is installed on the work frame (1). The electrical system includes a switching power supply (29), a three-position selector switch (30) connected to the switching power supply (29) circuit, a power conversion switch (31), a thermal relay (32) connected to the power conversion switch (31) circuit, and a motor (33) connected to the thermal relay (32) circuit. The indicator light (11), start button (12), stop button (13), and emergency stop button (14) are connected to the switching power supply (29) circuit respectively. The three-position selector switch (30) is connected to the reversing valve knob (15) and the electromagnetic reversing valve (20) circuit respectively. The motor (33) is located on the left side inside the work frame (1) and connected to the vane pump (17).

2. The flat tail actuating cylinder disassembly and assembly tool according to claim 1, characterized in that: The work frame (1) has four support components (2) around its bottom.

3. The disassembly and assembly fixture for a flat-tail actuator cylinder according to claim 1, characterized in that: The hydraulic system also includes two check valves (23) connected by pipelines between the vane pump (17), the hand pump (18) and the oil filter (19), a safety relief valve (24) connected by pipelines between the oil filter (19) and the solenoid directional valve (20), and a one-way throttle valve (25) connected by pipelines between the solenoid directional valve (20) and the tapered pipe joint (21).

4. The flat tail actuating cylinder disassembly and assembly tool according to claim 1, characterized in that: The oil tank (16) is connected to an air filter (26), and a level gauge (27) is installed on the outside.

5. The flat tail actuating cylinder disassembly assembly tool according to claim 1, characterized in that: The hand pump (18) is connected to a hand pump extension rod (28), which is located on the outside right side of the work frame (1).

6. The flat tail actuating cylinder disassembly assembly tool according to claim 1, characterized in that: The electrical system also includes a fuse (34) connected between the switching power supply (29) and the three-position selector switch (30), a contactor (35) connected between the start button (12) and the switching power supply (29), and two circuit breakers (36) connected to the switching power supply (29) and the power selector switch (31).

7. The flat tail actuating cylinder disassembly assembly tool according to claim 6, characterized in that: Two circuit breakers (36) are connected to sockets (37).

8. The flat tail actuating cylinder disassembly assembly tool according to claim 1, characterized in that: The reversing valve knob (15) and the three-position switch (30) correspond to three positions: extend, stop, and retract.

9. A method for using the flat tail actuating cylinder disassembly and assembly tooling, characterized in that: The flat-tail actuator disassembly and assembly fixture according to any one of claims 1 to 8 includes automatic operation and manual operation, wherein the specific steps of automatic operation are as follows:

1. After inserting the crossbar (5) into the lug connector at the protruding end of the flat tail actuator, fix the flat tail actuator on the upper panel (3) of the work frame (1) by means of the clamping device (6) and the mounting bracket (7); 2. Connect the socket (37) to the power supply, press the start button (12), the indicator light (11) will light up, the motor (33) will drive the vane pump (17) to run, and select the flat tail actuator piston rod to push out or retract according to the disassembly or assembly needs.

3. When it is necessary to push out the piston rod of the flat tail actuator: rotate the reversing valve knob (15) to the extension position, switch the corresponding three-position switch (30) to the extension position, transmit the signal to the solenoid reversing valve (20), the solenoid reversing valve (20) switches the oil flow direction, the oil flows through the oil tank (16) along the pipeline through the tapered pipe joint (21) into the two oil cylinders (4), and the two oil cylinders (4) push out the piston rod of the flat tail actuator through the crossbar (5); 4. When it is necessary to retract the piston rod of the flat tail actuator: rotate the reversing valve knob (15) to the retraction position, switch the corresponding three-position switch (30) to the retraction position, and transmit the signal to the solenoid reversing valve (20). The solenoid reversing valve (20) switches the oil flow direction, and the oil enters the two oil cylinders (4) through the oil tank (16) along the pipeline and through the tapered pipe joint (21). The two oil cylinders (4) retract the piston rod of the flat tail actuator through the crossbar (5).

5. Press the stop button (13), the motor (33) stops running, the oil cylinder (4) stops working, the reversing valve knob (15) is rotated to the stop position, and the corresponding three-gear switch (30) is switched to the stop position; VI. During the extension or retraction of the piston rod of the flat-tail actuator, the amount of oil entering and exiting is controlled by the one-way throttle valve (25) to control the extension or retraction speed of the piston rod of the flat-tail actuator.

10. The method of claim 9, wherein the method further comprises: providing a plurality of the assembly jigs; and assembling the plurality of the assembly jigs to form a plurality of the assembly jigs in a row. The specific steps for manual operation are as follows:

1. After inserting the crossbar (5) into the lug connector at the protruding end of the flat tail actuator, fix the flat tail actuator on the upper panel (3) of the work frame (1) by means of the clamping device (6) and the mounting bracket (7); 2. Select the extension or retraction of the flat-tail actuator piston rod according to the needs of disassembly or assembly; 3. When it is necessary to push out the piston rod of the flat tail actuator: rotate the reversing valve knob (15) to the extended position, switch the corresponding three-position switch (30) to the extended position, transmit the signal to the solenoid reversing valve (20), the solenoid reversing valve (20) switches the oil flow direction, then manually crank the hand pump extension rod (28) to drive the hand pump (18) to run, the oil flows through the oil tank (16) along the pipeline through the tapered pipe joint (21) into the two oil cylinders (4), the two oil cylinders (4) push out the piston rod of the flat tail actuator through the crossbar (5); 4. When it is necessary to retract the piston rod of the flat tail actuator: rotate the reversing valve knob (15) to the retraction position, switch the corresponding three-position switch (30) to the retraction position, and transmit the signal to the solenoid reversing valve (20). The solenoid reversing valve (20) switches the oil flow direction. Then, manually crank the hand pump extension rod (28) to drive the hand pump (18) to run. The oil flows through the oil tank (16) along the pipeline and enters the two oil cylinders (4) through the tapered pipe joint (21). The two oil cylinders (4) retract the piston rod of the flat tail actuator through the crossbar (5).

5. Stop cranking the hand pump extension rod (28), the hand pump (18) and the oil cylinder (4) stop working, rotate the reversing valve knob (15) to the stop position, and switch the corresponding three-speed switch (30) to the stop position.

Images