Electro-hydraulic servo actuator

Abstract

The utility model relates to the field of electro-hydraulic servo actuators, in particular to an electro-hydraulic servo actuator which comprises a piston cylinder barrel, one end of the piston cylinder barrel is provided with a fixing end and a fixing base, and the fixing end is fixedly connected with the fixing base through a fixing assembly. One end of the piston cylinder barrel is rotationally connected with the fixed end through a rotating shaft, a clamping piece used for fixing the rotating shaft is arranged on the side face of the piston cylinder barrel, a piston rod is slidably connected into the piston cylinder barrel, and the other end of the piston rod is provided with a pressure sensor and rotationally connected with a force application end; the unlocking rod is rotated to drive the cam to abut against the supporting rod so that the piston cylinder barrel and the fixed base can be rapidly disassembled and assembled, on one hand, the piston cylinder barrel can be conveniently disassembled, assembled and maintained, and on the other hand, production or experiment operation can be accelerated. And through the effect that the clamping piece can clamp the rotating shaft, the piston cylinder barrel can be conveniently positioned, and the force application end can be conveniently installed in a butt joint mode.

Description

Technical Field

[0001] The utility model relates to the field of electro-hydraulic servo actuators, in particular to an electro-hydraulic servo actuator. Background Art

[0002] In order to facilitate production or work needs, it is necessary to use an electro-hydraulic servo actuator to work. For example, the prior art Chinese patent announcement number "CN213628270U" discloses a hydrostatic support servo actuator, including a piston cylinder, a piston rod, a front ball joint seat and a rear ball joint seat. The utility model arranges a hydrostatic bearing between the piston rod and the spiral locking washer. Compared with the existing actuator, the piston rod can move at a slow speed without creeping or sticking, and the friction is reduced, the sensitivity is improved, and the vibration frequency is increased. The spiral locking washer 7 can eliminate the axial clearance and lock it, which is easy to operate and ensures stable and reliable operation. By arranging a mounting sleeve inside the piston cylinder, a number of balancing oil grooves are evenly opened on the inner surface of the mounting sleeve, which can prevent the piston from getting stuck, store oil and play a lubricating role, and make the piston do not need to install a piston sealing ring, so that frictionless movement can be performed. The interior of the piston rod is hollow, and the surface is covered with a protective layer, which is made of chrome, which reduces the inertia of the piston rod and increases the service life.

[0003] Some electro-hydraulic servo actuators fix the piston and cylinder via feet. However, in actual operation, it is inconvenient to install and disassemble the piston and cylinder and the feet. It is time-consuming and laborious to disassemble or maintain the piston and cylinder, which affects production operations. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcoming of the prior art that it is inconvenient to disassemble and assemble the piston and cylinder, and proposes an electro-hydraulic servo actuator.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An electro-hydraulic servo actuator is designed, comprising a piston cylinder, one end of the piston cylinder is provided with a fixed end and a fixed base, the fixed end and the fixed base are fixedly connected via a fixing assembly, one end of the piston cylinder is rotatably connected to the fixed end via a rotating shaft, and a clamping piece for fixing the rotating shaft is provided on its side, a piston rod is slidably connected inside the piston cylinder, the other end of the piston rod is provided with a pressure sensor and is rotatably connected to a force-applying end.

[0007] Furthermore, a servo motor and an electro-hydraulic servo valve are fixedly installed on the top of the piston cylinder, the servo motor and the electro-hydraulic servo valve are connected by a wire, the electro-hydraulic servo valve is connected to the piston cylinder by an oil pipe, and an oil inlet and an oil outlet are provided on the top.

[0008] Furthermore, the fixing assembly includes a pair of fixing rods fixedly installed on the side of the fixing end, the fixing rods are penetrated by positioning holes, and the side of the fixing base is provided with a mounting seat and a pair of mounting holes, and the fixing rods can be inserted into the mounting holes.

[0009] Furthermore, a cam is rotatably connected to the mounting seat via an unlocking rod, and a positioning rod is slidably connected inside the mounting seat, and the positioning rod can be inserted into the positioning hole, and a support rod is slidably connected inside the mounting seat, and a pair of first connecting rods and a pair of second connecting rods are rotatably connected to the top of the support rod, and one end of the pair of first connecting rods and the pair of second connecting rods rotate concentrically side by side, and the other ends thereof are respectively rotatably connected to the positioning rod and the side of the mounting seat.

[0010] Furthermore, a fixing plate is fixedly installed in the mounting seat, one end of the support rod is slidably connected to the fixing plate and is sleeved with a first spring, both ends of the first spring are respectively fixedly connected to the fixing plate and the side of the support rod, and the cam can resist and push the support rod.

[0011] Furthermore, the clamping part includes a plurality of clamping grooves provided on the periphery of the rotating shaft, a pair of clamping claws are rotatably connected to the side of the piston cylinder, a second spring is fixedly connected between the pair of clamping claws, one end of the clamping claw is provided with a pressing portion, and the other end thereof can be clamped into the clamping groove, and the piston cylinder is fixedly connected to the rotating shaft.

[0012] The utility model proposes an electro-hydraulic servo actuator, which has the beneficial effect that the utility model can quickly disassemble and assemble the piston cylinder and the fixed base by rotating the unlocking rod to drive the cam to contact the support rod. This is convenient for disassembly and maintenance of the piston cylinder on the one hand, and is also helpful for speeding up production or experimental operations on the other hand. The clamping part can lock the rotating shaft to facilitate positioning of the piston cylinder and docking and installation of the force-applying end head, which has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of area A;

[0015] Figure 3 It is a cross-sectional view of the fixed end of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the fixing assembly of the utility model;

[0017] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of area B.

[0018] In the figure: 1. piston cylinder; 11. piston rod; 12. pressure sensor; 2. fixed end; 3. fixed base; 4. fixed assembly; 41. fixed rod; 42. positioning hole; 43. mounting seat; 431. support rod; 432. first connecting rod; 433. second connecting rod; 434. fixed plate; 44. mounting hole; 45. unlocking rod; 46. cam; 47. positioning rod; 48. first spring; 5. rotating shaft; 6. clamping part; 61. clamping groove; 62. clamping claw; 63. second spring; 64. pressing part; 7. force end; 8. servo motor; 81. wire; 9. electro-hydraulic servo valve; 91. oil pipe; 92. oil inlet; 93. oil outlet. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-5 An electro-hydraulic servo actuator comprises a piston cylinder 1, one end of the piston cylinder 1 is provided with a fixed end 2 and a fixed base 3, the fixed end 2 and the fixed base 3 are fixedly connected via a fixing assembly 4, one end of the piston cylinder 1 is rotatably connected to the fixed end 2 via a rotating shaft 5, and a clamping member 6 for fixing the rotating shaft 5 is provided on its side, a piston rod 11 is slidably connected inside the piston cylinder 1, the other end of the piston rod 11 is provided with a pressure sensor 12 and is rotatably connected to a force-applying end 7.

[0021] In detail, the fixed end 2 facilitates the disassembly and assembly of the piston cylinder 1 in cooperation with the fixed base 3, and the force-applying end 7 facilitates the connection of the piston rod 11 with other devices;

[0022] The fixing assembly 4 facilitates assembly and disassembly between the piston cylinder 1 and the fixed base 3. The advantage of providing the clamping member 6 is that the installation angle of the piston cylinder 1 can be fixed by fixing the rotating shaft 5, so that the piston rod 11 can be connected with other devices at multiple angles.

[0023] Furthermore, a servo motor 8 and an electro-hydraulic servo valve 9 are fixedly installed on the top of the piston cylinder 1, and the servo motor 8 and the electro-hydraulic servo valve 9 are connected by a wire 81, and the electro-hydraulic servo valve 9 is connected to the piston cylinder 1 by an oil pipe 91, and an oil inlet 92 and an oil outlet 93 are provided on the top. The electrical signal transmitted by the servo motor 8 is converted into a flow drive signal of the electro-hydraulic servo valve 9, which is the existing technology of the electro-hydraulic servo actuator and will not be elaborated on.

[0024] Furthermore, the fixing assembly 4 includes a pair of fixing rods 41 fixedly installed on the side of the fixing end 2, and a positioning hole 42 is penetrated on the fixing rod 41. A mounting seat 43 is provided on the side of the fixing base 3 and a pair of mounting holes 44 are opened. The fixing rod 41 can be inserted into the mounting hole 44. By fixing and clamping the pair of fixing rods 41, the purpose of fixing the piston cylinder 1 and the fixing base 3 together is achieved. The mounting hole 44 is arranged above the mounting seat 43.

[0025] In more detail, the mounting seat 43 is rotatably connected to a cam 46 via an unlocking rod 45, and a positioning rod 47 is slidably connected inside the mounting seat 43, and the positioning rod 47 can be inserted into the positioning hole 42, and a support rod 431 is slidably connected inside the mounting seat 43, and a pair of first connecting rods 432 and a pair of second connecting rods 433 are rotatably connected to the top of the support rod 431, and one end of the pair of first connecting rods 432 and the pair of second connecting rods 433 rotate concentrically side by side, and the other ends thereof are rotatably connected to the positioning rod 47 and the side of the mounting seat 43, respectively.

[0026] It is worth mentioning that, due to the coaxial rotation between one end of the first connecting rod 432 and the second connecting rod 433, by driving the support rod 431 to move, a pair of the first connecting rods 432 and a pair of the second connecting rods 433 are rotated, and then the positioning rod 47 is driven to rise and fall, so as to achieve the effect of plugging into or disengaging from the positioning hole 42 to disassemble and assemble the fixing rod 41.

[0027] In general, a fixing plate 434 is fixedly installed in the mounting seat 43, one end of the support rod 431 is slidably connected to the fixing plate 434 and is sleeved with a first spring 48, both ends of the first spring 48 are respectively fixedly connected to the fixing plate 434 and the side of the support rod 431, and the cam 46 can resist and push the support rod 431.

[0028] In more detail, the fixing plate 434 and the first spring 48 are used to provide a supporting force for the support rod 431 so that it can drive a pair of the positioning rods 47 to be inserted into the positioning hole 42;

[0029] Then, the unlocking rod 45 is rotated to drive the cam 46 to contact and push the support rod 431, so as to achieve the function of retracting the positioning rod 47. After the unlocking rod 45 is released, under the action of the first spring 48, the support rod 431 and the positioning rod 47 return to their original positions.

[0030] Finally, the clamping member 6 includes a plurality of clamping grooves 61 provided on the periphery of the rotating shaft 5, a pair of clamping claws 62 are rotatably connected to the side of the piston cylinder 1, a second spring 63 is fixedly connected between the pair of clamping claws 62, a pressing portion 64 is provided at one end of the clamping claw 62, and the other end thereof can be clamped into the clamping groove 61, and the piston cylinder 1 and the rotating shaft 5 are fixedly connected.

[0031] The specific operation is that, through the elastic supporting force provided by the second spring 63, a pair of the claws 62 are clamped into the clamping groove 61, so as to fix the rotating shaft 5. Because the piston cylinder 1 is fixedly connected to the rotating shaft 5, clamping the rotating shaft 5 can fix the piston cylinder 1, so that it is convenient to adjust the installation angle of the piston cylinder 1 to perform work or tests at different angles.

[0032] Working method: When working, the unlocking rod 45 is rotated to drive the cam 46 to contact and push the support rod 431 to move. After the support rod 431 is driven to move, it drives the first connecting rod 432 and the second connecting rod 433 to flip, and then pulls the pair of positioning rods 47 to move downward, and then the pair of fixing rods 41 are plugged into the fixing base 3 from the mounting holes 44, and then the unlocking rod 45 is released. Under the action of the first spring 48, the support rod 431 drives the first connecting rod 432 and the second connecting rod 433 to return to their original positions. At this time, the positioning rod 47 is driven to move upward and plug into the positioning hole 42, so as to fix the fixing rod 41;

[0033] Afterwards, the pair of claws 62 are pressed to disengage them from the slots 61 , and after the piston cylinder 1 is rotated to adjust the angle, the pair of claws 62 are released and, under the action of the second spring 63 , the pair of claws 62 are engaged in the slots 61 to fix the piston cylinder 1 .

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electro-hydraulic servo actuator, comprising a piston cylinder (1), characterized in that: One end of the piston cylinder (1) is provided with a fixed end (2) and a fixed base (3), the fixed end (2) and the fixed base (3) are fixedly connected via a fixing assembly (4), one end of the piston cylinder (1) is rotatably connected to the fixed end (2) via a rotating shaft (5), and a clamping member (6) for fixing the rotating shaft (5) is provided on its side, a piston rod (11) is slidably connected inside the piston cylinder (1), and the other end of the piston rod (11) is provided with a pressure sensor (12) and is rotatably connected to a force-applying end (7).

2. The electro-hydraulic servo actuator according to claim 1, characterized in that: A servo motor (8) and an electro-hydraulic servo valve (9) are fixedly mounted on the top of the piston cylinder (1); the servo motor (8) and the electro-hydraulic servo valve (9) are connected via a wire (81); the electro-hydraulic servo valve (9) and the piston cylinder (1) are connected via an oil pipe (91); and an oil inlet (92) and an oil outlet (93) are provided on the top.

3. The electro-hydraulic servo actuator according to claim 1, characterized in that: The fixing assembly (4) comprises a pair of fixing rods (41) fixedly mounted on the side of the fixing end (2), the fixing rods (41) having positioning holes (42) passing through them, and the side of the fixing base (3) is provided with a mounting seat (43) and a pair of mounting holes (44), and the fixing rods (41) can be plugged into the mounting holes (44).

4. The electro-hydraulic servo actuator according to claim 3, characterized in that: The mounting seat (43) is rotatably connected to a cam (46) via an unlocking rod (45), and is slidably connected to a positioning rod (47) inside the mounting seat (43). The positioning rod (47) can be inserted into the positioning hole (42). The mounting seat (43) is slidably connected to a support rod (431). The top of the support rod (431) is rotatably connected to a pair of first connecting rods (432) and a pair of second connecting rods (433). One ends of the pair of first connecting rods (432) and the pair of second connecting rods (433) rotate concentrically side by side, and the other ends are rotatably connected to the positioning rod (47) and the side of the mounting seat (43), respectively.

5. The electro-hydraulic servo actuator according to claim 4, characterized in that: A fixing plate (434) is fixedly installed in the mounting seat (43), one end of the support rod (431) is slidably connected to the fixing plate (434) and is sleeved with a first spring (48), two ends of the first spring (48) are respectively fixedly connected to the fixing plate (434) and the side of the support rod (431), and the cam (46) can contact and push the support rod (431).

6. The electro-hydraulic servo actuator according to claim 1, characterized in that: The clamping member (6) comprises a plurality of clamping grooves (61) provided on the periphery of the rotating shaft (5); a pair of clamping claws (62) are rotatably connected to the side of the piston cylinder (1); a second spring (63) is fixedly connected between the pair of clamping claws (62); a pressing portion (64) is provided at one end of the clamping claw (62), and the other end of the clamping claw (62) can be clamped into the clamping groove (61); the piston cylinder (1) and the rotating shaft (5) are fixedly connected.

Images