Hydraulic oil cylinder with self-adaptive buffering device

Abstract

The utility model discloses a hydraulic oil cylinder with a self-adaptive buffering device, and belongs to the field of buffering of hydraulic oil cylinders. Comprising a cylinder body, a piston assembly, a rodless side end cover, a rod side end cover and a fixed joint, wherein the rodless side end cover and the rod side end cover are fixedly mounted at the two ends of the cylinder body; the piston joint is fixedly connected to one end, far away from the cylinder body, of the piston assembly; and the oil pipe joints are fixedly mounted on the rodless side end cover and the rod side end cover respectively and are communicated with a working cavity in the cylinder body. According to the hydraulic oil cylinder with the self-adaptive buffering device, the position of the piston assembly is monitored in real time through the displacement sensor, the throttling valve is automatically adjusted according to position information, the aperture opening degree of the throttling hole is changed, and therefore self-adaptive adjustment of buffering force is achieved. Therefore, the hydraulic oil cylinder can keep a stable buffering effect under different loads and working environments.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic cylinder buffering, and in particular to a hydraulic cylinder with an adaptive buffering device. Background Art

[0002] The main goal of the hydraulic cylinder's buffering technology is to achieve smooth deceleration of the hydraulic cylinder during movement to reduce shock and vibration, protect equipment and systems from damage, and improve equipment stability and reliability.

[0003] Common cylinder buffers mostly use liquid buffers, that is, by adding a buffer cavity inside the cylinder, the cavity is filled with a certain amount of liquid. When the cylinder moves, the liquid will enter the cavity through the buffer hole of the buffer cavity, thereby slowing down the speed of the cylinder. Its advantages are simple structure and low production cost, but the buffering effect is relatively poor, especially for different working environments and different loads. The corresponding buffering force is not adjusted in time and cannot be adapted, resulting in poor buffering capacity.

[0004] Therefore, the present application provides a hydraulic cylinder with an adaptive buffer device to solve the above problems. Utility Model Content

[0005] The present application provides a hydraulic cylinder with an adaptive buffer device, which aims to solve the problem proposed in the background art that the existing cylinder buffer device cannot adapt in time when dealing with different load working environments, resulting in poor buffering effect.

[0006] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a hydraulic cylinder with an adaptive buffer device, comprising a cylinder body, a piston assembly, a rodless side end cover and a rod side end cover fixedly mounted at both ends of the cylinder body, a fixed joint fixedly connected to the rodless side end cover, a piston joint fixedly connected to the end of the piston assembly away from the cylinder body, and an oil pipe joint fixedly mounted on the rodless side end cover and the rod side end cover and connected to the working chamber inside the cylinder body.

[0007] The headless side end cover and the rod side end cover are both provided with a throttling mechanism for adjusting the buffering force, and a buffer cavity connected to the working cavity is provided inside the headless side end cover and the rod side end cover, and a throttling hole with two ends connected to the buffer cavity and the working cavity respectively is provided inside the headless side end cover and the rod side end cover on one side of the buffer cavity, and a throttling valve for changing the opening degree of the throttling hole to change the oil flow rate is fixedly installed on the side of the headless side end cover and the rod side end cover.

[0008] A displacement sensor, electrically connected to the throttle valve, is fixedly mounted on the piston joint. This sensor monitors the position of the piston assembly in real time and automatically adjusts the throttle valve based on this position information, changing the aperture of the throttle orifice and thus achieving adaptive adjustment of the cushioning force. This enables the hydraulic cylinder to maintain a stable cushioning effect under varying loads and operating conditions.

[0009] Preferably, the throttle valve includes a valve core movably mounted inside the headless side end cover and the rod side end cover and extending radially into the throttle hole along the throttle hole, a moving iron core fixedly connected to the end of the valve core away from the throttle hole, a magnetoelectric coil sleeved on the outside of the moving iron core for driving the moving iron core to move, a shell fixedly mounted on the side of the headless side end cover and the rod side end cover for supporting the magnetoelectric coil, and a controller fixedly connected to the shell, and the input end of the controller is connected to the output end of the displacement sensor.

[0010] Preferably, a fixed iron core is provided in one end of the magnetic coil away from the valve core, and a compression spring is connected between the fixed iron core and the movable iron core.

[0011] Preferably, the oil pipe joints are connected to the working chamber through the buffer chamber.

[0012] Preferably, the piston assembly includes a rod that moves axially along the cylinder body, a piston head fixedly connected to the end of the rod away from the piston joint and slidingly connected to the inner wall of the cylinder body, and a buffer plug fixedly connected to both ends of the piston head and corresponding to the buffer cavity.

[0013] Preferably, the buffer plug is externally covered with a sealing sleeve.

[0014] Preferably, the controller and the displacement sensor are both connected to an external control center.

[0015] This hydraulic cylinder with an adaptive buffering device uses a displacement sensor to monitor the position of the piston assembly in real time. Based on this position information, it automatically adjusts the throttle valve and changes the aperture opening of the throttle orifice, thereby achieving adaptive adjustment of the buffering force. This enables the hydraulic cylinder to maintain a stable buffering effect under different loads and working conditions.

[0016] The hydraulic cylinder with the adaptive buffer device can reduce the impact and vibration of the hydraulic cylinder during movement, protect the equipment and system from damage, and improve the stability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a hydraulic cylinder with an adaptive buffer device;

[0018] Figure 2 A schematic diagram of the internal structure of a hydraulic cylinder with an adaptive buffer device;

[0019] Figure 3 for Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0020] In the picture:

[0021] 1. Cylinder body; 11. Rod side end cover; 111. Fixed joint; 12. Rod side end cover; 13. Oil pipe joint; 14. Working chamber;

[0022] 2. Piston assembly; 21. Rod; 22. Piston head; 23. Piston joint; 24. Buffer plug;

[0023] 3. Throttle mechanism; 31. Buffer chamber; 32. Throttle hole;

[0024] 33. Throttle valve; 331. Valve core; 332. Moving iron core; 333. Magnetocoil; 334. Housing; 335. Controller;

[0025] 4. Displacement sensor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] This embodiment provides a hydraulic cylinder with an adaptive buffer device, such as Figure 1-Figure 3 As shown, the hydraulic cylinder with an adaptive buffer device includes a cylinder body 1, a piston assembly 2, a rod side end cover 11 and a rod side end cover 12 fixedly mounted at both ends of the cylinder body 1, a fixed joint 111 fixedly connected to the rod side end cover 11, a piston joint 23 fixedly connected to the end of the piston assembly 2 away from the cylinder body 1, and an oil pipe joint 13 respectively fixedly mounted on the rod side end cover 11 and the rod side end cover 12 and connected to the working chamber 14 inside the cylinder body 1.

[0028] A throttling mechanism 3 for adjusting the buffering force is provided on the headless side end cover 11 and the rod side end cover 12. A buffer chamber 31 connected to the working chamber 14 is provided inside the headless side end cover 11 and the rod side end cover 12. A throttling hole 32 with two ends connected to the buffer chamber 31 and the working chamber 14 respectively is provided on one side of the buffer chamber 31. A throttling valve 33 for changing the aperture opening of the throttling hole 32 to change the oil flow rate is fixedly installed on the side of the headless side end cover 11 and the rod side end cover 12.

[0029] A displacement sensor 4 electrically connected to the throttle valve 33 is fixedly mounted on the piston joint 23 .

[0030] During use, when the hydraulic cylinder starts to move, the piston assembly 2 moves in the cylinder body 1, pushing the hydraulic oil through the working chamber 14; when the piston assembly 2 approaches the two ends of the cylinder body 1, that is, approaching the rodless side end cover 11 and the rod side end cover 12, the hydraulic oil will enter the buffer chamber 31; at this time, the throttling mechanism 3 begins to play a role, and when the hydraulic cylinder starts to move, the piston assembly 2 moves in the cylinder body 1, pushing the hydraulic oil through the working chamber 14; when the piston assembly 2 approaches the two ends of the cylinder body 1, that is, approaching the rodless side end cover 11 and the rod side end cover 12, the hydraulic oil will enter the buffer chamber 31; at this time, the throttling mechanism 3 begins to play a role, and the displacement sensor 4 is fixedly mounted on the piston joint 23 and moves with the movement of the piston assembly 2; the displacement sensor 4 can monitor the position of the piston assembly 2 in real time and send the position information to the throttle valve 33; the throttle valve 33 automatically adjusts the aperture opening of the throttle hole 32 according to the received position information to change the flow rate of the hydraulic oil, thereby realizing adaptive adjustment of the buffering force.

[0031] Specifically, the throttle valve 33 includes a valve core 331 movably mounted inside the headless side end cover 11 and the rod side end cover 12 and extending radially into the throttle hole 32, a moving iron core 332 fixedly connected to the end of the valve core 331 away from the throttle hole 32, a magnetoelectric coil 333 sleeved on the outside of the moving iron core 332 for driving the moving iron core 332 to move, a housing 334 fixedly mounted on the side of the headless side end cover 11 and the rod side end cover 12 for supporting the magnetoelectric coil 333, and a controller 335 fixedly connected to the housing 334, the input end of the controller 335 is connected to the output end of the displacement sensor 4, wherein the magnetoelectric coil 333 has a fixed iron core in the end away from the valve core 331 A compression spring is connected between the fixed iron core and the movable iron core 332; when the magnetoelectric coil 333 is not working, the compression spring pushes the movable iron core 332 toward the fixed iron core, keeping the throttle hole 32 in the initial state; when the displacement sensor 4 detects a position change of the piston assembly 2, it sends a signal to the controller 335. The controller 335 calculates the required buffering force based on the preset algorithm and the received position information, and sends an instruction to the magnetoelectric coil 333. The magnetoelectric coil 333 generates a magnetic field according to the instruction. The magnetic field it generates will overcome the elastic force of the compression spring, attract or repel the movable iron core 332, thereby driving the valve core 331 to move in the throttle hole 32, changing the aperture opening degree of the throttle hole 32.

[0032] It can be understood that the oil pipe joints 13 are connected to the working chamber 14 through the buffer chamber 31; the hydraulic oil enters the buffer chamber 31 through the oil pipe joints 13, and then enters the working chamber 14 through the throttle hole 32. The aperture opening of the throttle hole 32 determines the flow rate of the hydraulic oil and the magnitude of the buffer force.

[0033] Specifically, the piston assembly 2 includes a rod 21 that moves axially along the cylinder body 1, a piston head 22 fixedly connected to the end of the rod 21 away from the piston joint 23 and slidingly connected to the inner wall of the cylinder body 1, and a buffer plug 24 fixedly connected to the two ends of the piston head 22 corresponding to the buffer cavity 31; the rod 21 moves axially along the cylinder body 1, driving the piston head 22 to slide in the cylinder body 1, and the buffer plugs 24 at both ends of the piston head 22 correspond to the buffer cavity 31, which is used to provide additional buffering effect when the piston assembly 2 approaches the two ends of the cylinder body 1.

[0034] Furthermore, the buffer plug 24 is covered with a sealing sleeve to improve the sealing effect between the buffer plug 24 and the buffer cavity 31 and ensure the stability of the buffer force adjustment.

[0035] In addition, the controller 335 and the displacement sensor 4 are both connected to an external control center; the external control center can monitor the working status of the hydraulic cylinder in real time and adjust the parameters of the controller 335 as needed to achieve more accurate buffer control.

[0036] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A hydraulic cylinder with an adaptive buffer device, comprising a cylinder body (1), a piston assembly (2), a rod-side end cover (11) and a rod-side end cover (12) fixedly mounted at both ends of the cylinder body (1), a fixed joint (111) fixedly connected to the rod-side end cover (11), a piston joint (23) fixedly connected to an end of the piston assembly (2) away from the cylinder body (1), and an oil pipe joint (13) fixedly mounted on the rod-side end cover (11) and the rod-side end cover (12) and connected to a working chamber (14) inside the cylinder body (1), characterized in that: The rodless side end cover (11) and the rod side end cover (12) are both provided with a throttling mechanism (3) for adjusting the buffering force, the rodless side end cover (11) and the rod side end cover (12) are both provided with a buffer chamber (31) in communication with the working chamber (14), the rodless side end cover (11) and the rod side end cover (12) are both provided with a throttling hole (32) on one side of the buffer chamber (31), with two ends thereof respectively in communication with the buffer chamber (31) and the working chamber (14), and the side surfaces of the rodless side end cover (11) and the rod side end cover (12) are both fixedly installed with a throttling valve (33) for changing the aperture opening of the throttling hole (32) to change the flow rate of the oil; A displacement sensor (4) electrically connected to the throttle valve (33) is fixedly mounted on the piston joint (23).

2. The hydraulic cylinder with an adaptive buffer device according to claim 1, characterized in that: The throttle valve (33) comprises a valve core (331) movably mounted inside the headless side end cover (11) and the rod side end cover (12) and extending radially along the throttle hole (32) into the throttle hole (32), a moving iron core (332) fixedly connected to an end of the valve core (331) away from the throttle hole (32), a magnetoelastic coil (333) sleeved on the outside of the moving iron core (332) for driving the moving iron core (332) to move, a housing (334) fixedly mounted on the side of the headless side end cover (11) and the rod side end cover (12) for supporting the magnetoelastic coil (333), and a controller (335) fixedly connected to the housing (334), wherein an input end of the controller (335) is connected to an output end of the displacement sensor (4).

3. The hydraulic cylinder with an adaptive buffer device according to claim 2, characterized in that: The end of the magnetic coil (333) away from the valve core (331) has a fixed iron core, and a compression spring is connected between the fixed iron core and the movable iron core (332).

4. The hydraulic cylinder with an adaptive buffer device according to claim 3, characterized in that: The oil pipe joints (13) are connected to the working chamber (14) through the buffer chamber (31).

5. The hydraulic cylinder with an adaptive buffer device according to claim 4, characterized in that: The piston assembly (2) comprises a rod (21) that moves axially along the cylinder body (1), a piston head (22) that is fixedly connected to one end of the rod (21) away from the piston joint (23) and is slidably connected to the inner wall of the cylinder body (1), and a buffer plug (24) that is fixedly connected to both ends of the piston head (22) and corresponds to the buffer cavity (31).

6. The hydraulic cylinder with an adaptive buffer device according to claim 5, characterized in that: The buffer plug (24) is externally covered with a sealing sleeve.

7. The hydraulic cylinder with an adaptive buffer device according to claim 6, characterized in that: The controller (335) and the displacement sensor (4) are both connected to an external control center.

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