Oil cylinder control system

Abstract

The utility model discloses an oil cylinder control system which comprises a cylinder body, a displacement sensor which penetrates into the cylinder body to conduct displacement sensing detection is arranged on one face of the outer portion of the cylinder body through a protective cover, and hydraulic oil enters a piston cavity through an operation electromagnetic valve block and drives a piston to conduct linear motion through the pressure of oil pressure. The servo oil cylinder can compare the output of the displacement sensor with a target position, the control system can adjust the motion of the oil cylinder in real time, it is ensured that the oil cylinder accurately reaches the set position, closed-loop control is achieved, and the working efficiency is improved. And meanwhile, the piston rod of the servo oil cylinder can be always kept in the initial state in the movement process under the cooperation of the piston guide column and the piston guide hole site, so that the phenomenon of rotation deviation in the movement of the piston is avoided, and the working stability of the servo oil cylinder is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil cylinders, and in particular relates to an oil cylinder control system. Background Art

[0002] The oil cylinder is a hydraulic cylinder. The hydraulic cylinder is a linear motion actuator whose output force is proportional to the effective area of ​​the piston and the pressure difference on both sides. Its function is to convert hydraulic energy into mechanical energy. The input of the oil cylinder is the flow rate and pressure of the fluid, and the output is the linear motion speed and force. The servo hydraulic cylinder is the actuator of the hydraulic pressing system and is a high-precision hardware. It is required to have characteristics such as large structural rigidity, extremely low friction coefficient, good sealing performance and wear resistance, and extremely high response frequency. However, the servo oil cylinder in the existing technology has the phenomenon of simple structure and single function. At the same time, when the servo oil cylinder is in contact with the external workpiece to be driven to produce a working stroke displacement, it cannot automatically adjust the force contact coordination between the workpiece and the abutting surface, resulting in damage to the oil cylinder.

[0003] To this end, a new type of servo cylinder with the announcement number "CN212838700U" includes a cylinder body, a piston and a cylinder head. The internal sliding seal of the cylinder body is connected to the piston, and the top of the piston is provided with a piston rod. The top of the cylinder body is detachably connected to the cylinder head. A through groove is opened in the middle of the cylinder head, and the upper end of the piston rod passes through the through groove. An adjustment component is provided on the top of the piston rod, and a magnetostrictive displacement sensor is provided in the rodless cavity of the cylinder body. The utility model provides a new type of servo cylinder. Through the design and use of a series of structures, it has the advantages of reasonable structure and diverse functions during use. At the same time, when the servo cylinder is in contact with the external workpiece to be driven to produce a working stroke displacement, it can achieve the purpose of automatically adjusting the force contact coordination degree between the workpiece and the abutting surface, thereby further improving the effect of protecting the cylinder.

[0004] However, for the above-mentioned new servo cylinder, although the magnetostrictive displacement sensor is set to measure the relative displacement of the cylinder piston, i.e., the piston rod, to achieve precise control of the stroke, the following more obvious defects still exist during use: during the operation of the servo cylinder, the piston is always in an up and down movement state to ensure that the thickness difference of the strip is within the normal control range, but since there is no movement guide limit structure for the piston, the problem of position offset will occur during the movement of the piston. Only setting a displacement sensor cannot ensure that the piston always maintains the same position and moves. Utility Model Content

[0005] The purpose of the present utility model is to provide a cylinder control system to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a cylinder control system, comprising:

[0007] A cylinder body, wherein a displacement sensor penetrating into the interior of the cylinder body for displacement sensing detection is provided on the outer side of the cylinder body through a protective cover; a piston guide sleeve for limiting the position of the piston rod body and for telescopic dust-proof sealing is provided on one end of the cylinder body with a cavity; two piston guide posts for guiding and preventing displacement of the piston rod body are provided on the raised surface of the piston cavity inside the cylinder body; an operating solenoid valve block is provided on the outside of the cylinder body in communication with the piston cavity for controlling the inflow and outflow of oil;

[0008] The oil cylinder piston is movable and retractable in the piston cavity opened on one side of the cylinder body, and a piston guide hole is opened at the position of the piston guide column on one side of the oil cylinder piston to keep the position unchanged when the oil cylinder piston is retracted and extended, and a cylindrical cavity is opened at the position of the displacement sensor on one side of the oil cylinder piston.

[0009] Preferably, a magnetic ring seat is provided in a cavity opened from the inside to the outside at one end of the cylindrical cavity, and a magnetic gasket and a magnetic ring are embedded and fixed on one side of the magnetic ring seat. The magnetic ring can be used in conjunction with a displacement sensor to provide accurate position information to ensure that the piston movement is always in the same position.

[0010] Preferably, a guide column ring is embedded and fixed on the port at one end of the piston guide hole, through which the piston guide column passes for guidance, so that the piston maintains a stable position during movement.

[0011] Preferably, the piston guide sleeve is a cylindrical T-shaped structure, and one end of the piston guide sleeve extends into the interior of the piston cavity. The side of the inner ring of the piston guide sleeve that contacts the cylinder piston is embedded with a dust ring, a step seal, a guide belt and an O-ring from left to right in sequence to enhance the sealing of the piston during movement in the servo cylinder.

[0012] Preferably, threaded mounting rods are fixed to the upper and lower ends of one side of the cylinder body, and a locking disc for mounting and fixing the oil cylinder is fixed to the threaded mounting rod via a nut, thereby achieving the installation and fixation of the servo oil cylinder.

[0013] Preferably, a piston rod is provided at the center of one side of the oil cylinder piston, and the surface of the piston rod is sealed and telescopically fitted with the inner ring cavity of the piston guide sleeve. A grid ring is provided on the side of the oil cylinder piston that is fitted with the piston cavity of the cylinder body to ensure that the pressure in the oil cylinder remains stable and enhance the sealing of the system.

[0014] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the oil cylinder control system, through the cooperation of the piston guide column set by screws in the piston cavity of the cylinder body, and the piston guide hole position of the cylinder piston located at one end inside the piston cavity corresponding to the piston guide column, and the movable extension and contraction of the displacement sensor and the cylindrical cavity, the hydraulic oil is used to enter the piston cavity by operating the electromagnetic valve block, and the piston is driven by the oil pressure to perform linear motion. In the process, the servo oil cylinder can compare the output of the displacement sensor with the target position, and the control system can adjust the movement of the oil cylinder in real time to ensure that it reaches the set position accurately, thereby realizing closed-loop control. At the same time, the cooperation of the piston guide column and the piston guide hole position can enable the piston rod of the servo oil cylinder to always maintain its initial state during the movement, so that the movement of the piston will not show rotational deviation, further improving the working stability of the servo oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the servo cylinder of the utility model.

[0017] In the figure: 1. Cylinder body; 2. Protective cover; 3. Displacement sensor; 4. Piston guide sleeve; 5. Piston guide column; 6. Cylinder piston; 7. Piston guide hole; 8. Cylindrical cavity; 9. Operating solenoid valve block; 10. Magnetic ring seat; 11. Magnetic gasket; 12. Magnetic ring; 13. Guide column ring; 14. Dust ring; 15. Step seal; 16. Guide belt; 17. O-ring; 18. Threaded mounting rod; 19. Locking disc; 20. Piston rod; 21. Gray ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-2 The utility model provides a technical solution: a cylinder control system, including:

[0020] Cylinder body 1, the outer side of the cylinder body 1 is provided with a displacement sensor 3 that penetrates into the interior of the cylinder body 1 for displacement sensing detection through a protective cover 2. The displacement sensor 3 can monitor the position of the servo cylinder piston in real time and feed back the position data to the control system to achieve the basis for high-precision control. The end of the cylinder body 1 with a cavity is provided with a piston guide sleeve 4 for limiting the piston rod body and telescopic dust-proof sealing, so that the cylinder piston 6 maintains sealing in the moving state to prevent dust from entering the interior of the cylinder body 1. Two piston guide columns 5 are provided on the convex surface of the piston cavity inside the cylinder body 1 to guide and prevent displacement of the piston rod body, so that the cylinder piston 6 always keeps moving in the same position in the moving state. An operating solenoid valve block 9 is provided on the outside of the cylinder body 1 to control the inflow and outflow of oil, and the operating solenoid valve block 9 controls the flow direction and flow of the hydraulic oil through the switch, determines the expansion and retraction of the cylinder, realizes precise adjustment of the system pressure, and ensures that the servo cylinder operates in the best working state.

[0021] The oil cylinder piston 6 is movable and retractable in the piston cavity opened on one side of the cylinder body 1, so that the oil cylinder piston 6 has a better and stronger pushing force, and a piston guide hole 7 is opened at the position of the piston guide column 5 on one side of the oil cylinder piston 6 to keep the oil cylinder piston 6 in the same position after retraction, so that the oil cylinder piston 6 can remain stable in the working state, and a cylindrical cavity 8 is opened at the position of the displacement sensor 3 on one side of the oil cylinder piston 6 to enable the displacement sensor 3 to detect the movement state in real time when the oil cylinder piston 6 is working.

[0022] A magnetic ring seat 10 is provided in the cavity opened from the inside to the outside at one end of the cylindrical cavity 8, and a magnetic gasket 11 and a magnetic ring 12 are embedded and fixed on one side of the magnetic ring seat 10 to achieve precise position control, ensure that the feedback mechanism of the system is sensitive and effective, and can effectively reduce the hysteresis phenomenon, thereby improving the response speed and stability of the cylinder, ensuring high-precision control and high-efficiency output. A guide column ring 13 is embedded and fixed on the port at one end of the piston guide hole 7 to allow the piston guide column 5 to pass through for guidance, so that the guide column ring 13 seals the piston guide column 5 during expansion and contraction to prevent oil from entering the piston guide hole 7. The piston guide sleeve 4 is cylindrical It has a T-shaped structure, and one end of the piston guide sleeve 4 extends into the interior of the piston cavity. The inner ring of the piston guide sleeve 4 contacts the cylinder piston 6 on a side which is sequentially embedded with a dust ring 14, a step seal 15, a guide belt 16 and an O-ring 17 from left to right, which strengthens the sealing of the piston in the servo cylinder and reduces the entry of dust. The step seal 15 can effectively prevent liquid leakage, ensure the pressure inside the cylinder body 1 is stable, and improve the overall reliability of the system. The guide belt 16 provides additional support to ensure the stable movement of the cylinder piston 6 in the cylinder body 1, reduce tilt and vibration, reduce wear, protect the internal components of the cylinder, and extend the service life of the equipment.

[0023] Threaded mounting rods 18 are fixed to the upper and lower ends of one side of the cylinder body 1, and a locking disc 19 for mounting and fixing the oil cylinder is fixed on the threaded mounting rod 18 by a nut, which is convenient for mounting and fixing the servo oil cylinder and is also convenient for disassembly at a later time. A piston rod 20 is provided at the center position of one side of the oil cylinder piston 6, and the surface of the piston rod 20 is sealed and telescopically fitted with the inner ring cavity of the piston guide sleeve 4. A grid ring 21 is provided on the side where the oil cylinder piston 6 is fitted with the piston cavity of the cylinder body 1. The grid ring 21 can effectively prevent leakage of hydraulic oil, ensure the sealing and stability of the system, withstand high loads, and extend the service life of the oil cylinder, so as to effectively block external impurities from entering the interior of the oil cylinder, protect internal components, and ensure smooth operation of the system.

[0024] Specifically, when in use, first install the servo cylinder in the designated position using the threaded mounting rod 18 and the locking disc 19 for use, and connect the external oil supply pipe to the operating solenoid valve block 9, so that the operating solenoid valve block 9 controls the hydraulic oil to enter the piston chamber in the cylinder body 1, and uses the pressure of the hydraulic oil in the sealed piston chamber to make the cylinder piston 6 and the piston rod 20 move inside the cylinder body 1, and makes the displacement sensor 3 move in the cylindrical cavity 8 to monitor the cylinder piston 6 in real time to avoid large offset of the cylinder piston 6. At the same time, the piston guide hole 7 set on the cylinder piston 6 guides the movement on the piston guide column 5, so that the piston rod 20 and the cylinder piston 6 can always remain stable during movement, and the cylinder piston 6 can always remain in the same position, thereby making the servo cylinder more stable during work, and will not cause tilting and wear.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cylinder control system, characterized in that: include: A cylinder body (1), wherein a displacement sensor (3) is provided on the outer side of the cylinder body (1) through a protective cover (2) and penetrates into the interior of the cylinder body (1) for displacement sensing detection; a piston guide sleeve (4) is provided on one end of the cylinder body (1) with a cavity for limiting the piston rod body and performing telescopic dust sealing; two piston guide posts (5) are provided on the raised surface of the piston cavity inside the cylinder body (1) for guiding and preventing displacement of the piston rod body; an operating electromagnetic valve block (9) is provided on the outside of the cylinder body (1) for controlling the inflow and outflow of oil and communicating with the piston cavity; The oil cylinder piston (6) is movable and retractable in a piston cavity provided on one side of the cylinder body (1), and a piston guide hole (7) is provided on one side of the oil cylinder piston (6) at a position corresponding to a piston guide column (5) for maintaining the position of the oil cylinder piston during retraction and retraction, and a columnar cavity (8) is provided on one side of the oil cylinder piston (6) at a position corresponding to a displacement sensor (3).

2. The oil cylinder control system according to claim 1, characterized in that: A magnetic ring seat (10) is provided in a cavity opened from the inside to the outside at one end of the cylindrical cavity (8), and a magnetic conductive gasket (11) and a magnetic ring (12) are respectively embedded and fixed on one side of the magnetic ring seat (10).

3. The oil cylinder control system according to claim 1, characterized in that: A guide column ring (13) is embedded and fixed on the port at one end of the piston guide hole (7) for guiding the piston guide column (5) to pass through.

4. The oil cylinder control system according to claim 1, characterized in that: The piston guide sleeve (4) is a cylindrical T-shaped structure, and one end of the piston guide sleeve (4) extends into the interior of the piston cavity. A dust ring (14), a step seal (15), a guide belt (16), and an O-ring (17) are embedded in the inner ring of the piston guide sleeve (4) on the side in contact with the oil cylinder piston (6) from left to right.

5. The oil cylinder control system according to claim 1, characterized in that: The upper and lower ends of one side of the cylinder body (1) are both fixed with threaded mounting rods (18), and a locking disc (19) for mounting and fixing the oil cylinder is fixed on the threaded mounting rod (18) via a nut.

6. The oil cylinder control system according to claim 1, characterized in that: A piston rod (20) is provided at the center of one side of the oil cylinder piston (6), and the surface of the piston rod (20) is in close contact with the inner ring cavity of the piston guide sleeve (4) to seal and expand and contract. A grid ring (21) is provided on the side of the oil cylinder piston (6) that is in contact with the piston cavity of the cylinder body (1).

Images