Hydraulic cylinder with self-adaptive load adjusting function

Abstract

The hydraulic cylinder with the self-adaptive load adjusting function comprises a cylinder barrel and a piston rod, a cavity is formed in the cylinder barrel, a piston is arranged in the cavity in a sliding mode, a pressure sensor is arranged at the bottom end of the piston, the piston is fixedly connected with the piston rod, an installation bottom plate is arranged at the bottom end of the cylinder barrel, and an installation top plate is arranged at the top end of the piston rod. Mounting assemblies are arranged on the mounting bottom plate and the mounting top plate, the mounting bottom plate is fixedly connected with the connecting plate through the mounting assemblies, a hydraulic oil cylinder is arranged on the connecting plate, the hydraulic oil cylinder is connected with the cylinder barrel through a circulation assembly, and a discharging mechanism matched with the cylinder barrel is further arranged on the connecting plate. According to the hydraulic cylinder, the arranged discharging mechanism is matched with the circulation assembly, normal use of the hydraulic cylinder is not affected, hydraulic oil in the cylinder barrel can be conveniently discharged when the hydraulic oil needs to be replaced or filtered, operation such as filtering and replacing can be conveniently carried out, complete discharging is guaranteed, residual of the hydraulic oil containing impurities is avoided, and the service life of the hydraulic cylinder is prolonged. And the subsequent use is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder technical field, specifically is a kind of hydraulic cylinder with self-adapting load adjustment function. BACKGROUND

[0002] Hydraulic pressure is widely used in industry transmission technology, especially in linear motion field, with its heavy load, smooth, impact resistance, durable and reliable superior performance, in metal forming, rubber and plastic machinery, heavy machine tool field universal application.

[0003] And the existing hydraulic cylinder has certain defect in actual use, although filter and other devices are provided in hydraulic oil tank, it is convenient to filter hydraulic oil, ensure clean, but it is inconvenient to treat the inside of cylinder barrel, and the hydraulic oil containing impurities can exist in the inside of cylinder barrel, cannot be completely discharged, affect use effect. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of hydraulic cylinder with self-adapting load adjustment function to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of hydraulic cylinder with self-adapting load adjustment function, including cylinder barrel and piston rod, cavity is set up in cylinder barrel, piston is slidably arranged in cavity, pressure sensor is arranged at the bottom end of piston, piston is fixedly connected with piston rod, and the top end of piston rod is slidably arranged out of cavity, installation bottom plate is arranged at the bottom end of cylinder barrel, installation top plate is arranged at the top end of piston rod, installation assembly is arranged on installation bottom plate and installation top plate, installation bottom plate is fixedly connected with connecting plate by installation assembly, hydraulic oil cylinder is arranged on connecting plate, hydraulic oil cylinder is connected with cylinder barrel by flow-through assembly, and discharge mechanism matched with cylinder barrel is further arranged on connecting plate.

[0006] Preferably, to ensure sealing effect, without affecting use, sealing sleeve is sleeved on the outer circumferential surface of piston, sealing sleeve is matched with the inner wall of cavity, and sealing ring is arranged at the contact position of cylinder barrel and piston rod.

[0007] Preferably, to facilitate installation and fixation, ensure stability and firmness, installation assembly includes installation hole equidistantly arranged on installation bottom plate, installation screw is arranged in installation hole, and the structure of installation assembly on installation top plate is same with the structure of installation assembly on installation bottom plate.

[0008] Preferably, to not affect normal use, flow-through assembly includes upper flow-through pipe and lower flow-through pipe arranged on the side wall of hydraulic oil cylinder, and the upper flow-through pipe and lower flow-through pipe are connected with cavity.

[0009] Preferably, in order to conveniently discharge the hydraulic oil in the cylinder, facilitate filtering or replacement, the discharge mechanism comprises an oil storage tank arranged on the connecting plate, and an upper discharge pipe and a lower discharge pipe are sequentially arranged on the side wall of the oil storage tank, and the upper discharge pipe and the lower discharge pipe are both in communication with the cavity.

[0010] Preferably, in order to facilitate connection and assembly, ensure stable and firm, and also facilitate adjustment and operation, the upper flow pipe, the lower flow pipe, the upper discharge pipe and the lower discharge pipe are all connected with the cylinder through connecting flanges, and the connecting flanges are all provided with electric control valves on one side.

[0011] Preferably, in order to conveniently uniformly discharge the collected hydraulic oil, the oil storage tank is provided with a discharge pipe at the bottom end of the side away from the lower discharge pipe.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] (1) The discharge mechanism cooperates with the flow assembly, so that the normal use of the hydraulic cylinder is not affected, and when it is necessary to replace or filter the hydraulic oil, the hydraulic oil in the cylinder can be conveniently discharged, thereby facilitating filtering and replacement and the like, ensuring complete discharge, avoiding residual of the hydraulic oil containing impurities, and not affecting subsequent use.

[0014] (2) The installation assembly can facilitate installation operation of the whole, and cooperate with the connecting flanges and the like to facilitate assembly, ensure stable and firm during use, and the pressure sensor can facilitate adaptive adjustment of the load according to use monitoring, without affecting normal use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of a hydraulic cylinder with self-adaptive load adjustment function;

[0016] Figure 2 is a structural schematic view of a hydraulic cylinder with self-adaptive load adjustment function;

[0017] Figure 3 is a partial structural schematic view of a hydraulic cylinder with self-adaptive load adjustment function;

[0018] Figure 4 is a partial structural schematic view of a cylinder and a piston rod in a hydraulic cylinder with self-adaptive load adjustment function;

[0019] Figure 5 is a partial structural schematic view of a cylinder and a piston rod in a hydraulic cylinder with self-adaptive load adjustment function.

[0020] In the diagram: 1. Cylinder; 2. Piston rod; 3. Connecting plate; 4. Mounting base plate; 5. Mounting top plate; 6. Mounting hole; 7. Hydraulic cylinder; 8. Oil reservoir; 9. Discharge pipe; 10. Upper flow pipe; 11. Lower flow pipe; 12. Upper discharge pipe; 13. Lower discharge pipe; 14. Solenoid valve; 15. Connecting flange; 16. Mounting screw; 17. Piston; 18. Sealing sleeve; 19. Pressure sensor; 20. Sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 This utility model provides an embodiment of a hydraulic cylinder with adaptive load adjustment function, comprising a cylinder barrel 1 and a piston rod 2. The cylinder barrel 1 has an internal cavity, and a piston 17 is slidably disposed within the cavity. The top end of the piston 17 is welded and fixed to the piston rod 2, and the top end of the piston rod 2 slidably extends out of the cavity. A sealing sleeve 18 is fitted onto the outer circumferential side of the piston 17, matching the inner wall of the cavity. A sealing ring 20 is provided at the contact point between the cylinder barrel 1 and the piston rod 2 to ensure a sealing effect. A hydraulic cylinder 7 (containing hydraulic oil) is located on one side of the cylinder barrel 1. The cylinder barrel 1 is the main body of the hydraulic cylinder, used to contain the hydraulic oil and provide a channel for the piston 17 to move. An upper flow pipe 10 and a lower flow pipe 11 of a flow assembly are provided on the side wall, both connected to the cavity and distributed at the upper and lower ends of the piston 17. A hydraulic pump (not shown in the figure), a control system, etc., are also provided. A pressure sensor 19 is provided at the bottom of piston 17 (it can also be installed in other positions in the cavity according to the actual situation; this is a relatively mature technology and will not be described in detail here). The pressure sensor 19 collects the pressure value in the rodless cavity and transmits the data to the data processor (not shown in the figure). The data processor stores a preset pressure value, which is set according to the actual working requirements of the hydraulic cylinder, such as the oil pressure corresponding to the expected load force. The data processor compares the collected pressure value with the preset value. If the actual pressure is lower than the preset value, it means that the load force is insufficient. The drive mechanism (hydraulic pump, not shown in the figure) controls the hydraulic oil to supply oil to the rodless cavity, causing the piston rod 2 to extend and increase the load force. Conversely, if the actual pressure is higher than the preset value, it means that the load force is too large. The drive mechanism controls the hydraulic oil to flow back from the rodless cavity to the rod cavity, causing the piston rod 2 to retract and reduce the load force. This is a relatively mature technology and will not be described in detail here.

[0023] Please see Figures 1-5To facilitate assembly and ensure stability during use, a mounting base plate 4 can be welded to the bottom of the cylinder 1, and a mounting top plate 5 can be welded to the top of the piston rod 2. Both the mounting base plate 4 and the mounting top plate 5 have mounting holes 6 for mounting components, and mounting screws 16 (not shown on the mounting top plate 5) are installed in the mounting holes 6. A connecting plate 3 is fixedly connected to the mounting base plate 4 via the mounting screws 16. A hydraulic cylinder 7 is mounted on the connecting plate 3. To facilitate periodic filtering or replacement of the hydraulic oil inside the cylinder 1 and prevent impurities from affecting its use, a discharge mechanism is installed on the connecting plate 3. The oil reservoir 8 has an upper discharge pipe 12 and a lower discharge pipe 13 arranged sequentially on its side wall. A discharge pipe 9 is provided at the bottom of the side of the oil reservoir 8 away from the lower discharge pipe 13 to facilitate the unified discharge of collected hydraulic oil, which is convenient for subsequent filtration or replacement operations. The upper discharge pipe 12 and the lower discharge pipe 13 are both connected to the cavity. In order to facilitate connection and disassembly operations, the upper flow pipe 10, the lower flow pipe 11, the upper discharge pipe 12 and the lower discharge pipe 13 are all connected to the cylinder 1 through connecting flanges 15. An electric control valve 14 is provided on one side of each connecting flange 15 for easy adjustment and control.

[0024] Working Principle: In use, this utility model can be assembled and fixed to the connecting plate 3 via the mounting holes 6 on the mounting base plate 4 and mounting screws 16. Similarly, the mounting top plate 5 on the top of the piston rod 2 can be installed and fixed for convenient subsequent use. The upper flow pipe 10, lower flow pipe 11, upper discharge pipe 12, and lower discharge pipe 13 can be connected and fixed sequentially via the connecting flange 15. During daily use, the hydraulic pump, pressure sensor 19, and upper and lower flow pipes 10 and 11 can be used for adjustment based on the load. When it is necessary to replace the hydraulic oil in the cylinder 1 and hydraulic cylinder 7, the hydraulic oil in the hydraulic cylinder 7 connected to the lower discharge pipe 13 should be replaced first. This can be done by closing the solenoid valves 14 on the lower flow pipe 11 and upper discharge pipe 12, and the solenoid valves 14 on the upper flow pipe 10 and lower discharge pipe 13. 4. When the hydraulic pump is activated, hydraulic oil flows into the cavity through the upper flow pipe 10. In conjunction with piston 17, the hydraulic oil in the lower part of the cavity is discharged into the oil reservoir 8 through the lower discharge pipe 13. The lower part of the hydraulic oil in the cavity of cylinder 1 is discharged. Then, the solenoid valves 14 on the lower flow pipe 11 and upper discharge pipe 12 are opened, while those on the upper flow pipe 10 and lower discharge pipe 13 are closed. The hydraulic pump then allows clean hydraulic oil to flow into the cavity through the lower flow pipe 11. In conjunction with piston 17, the hydraulic oil in the upper part of the cavity is discharged into the oil reservoir 8 through the upper discharge pipe 12, and then discharged through the discharge pipe 9. Finally, the solenoid valves 14 on the upper discharge pipe 12 and lower discharge pipe 13 are closed, while those on the upper flow pipe 10 and lower flow pipe 11 are opened. Normal operation is then possible, ensuring the cleanliness of the cylinder 1.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydraulic cylinder with adaptive load adjustment function, comprising a cylinder barrel (1) and a piston rod (2), characterized in that: The cylinder (1) has a cavity, and a piston (17) is slidably disposed in the cavity. A pressure sensor (19) is disposed at the bottom end of the piston (17). The piston (17) is fixedly connected to the piston rod (2), and the top end of the piston rod (2) slides out of the cavity. The bottom end of the cylinder (1) is provided with a mounting base plate (4), and the top end of the piston rod (2) is provided with a mounting top plate (5). Both the mounting base plate (4) and the mounting top plate (5) are provided with mounting components. The mounting base plate (4) is fixedly connected to the connecting plate (3) through the mounting components. The connecting plate (3) is provided with a hydraulic cylinder (7), and the hydraulic cylinder (7) is connected to the cylinder (1) through a flow component. The connecting plate (3) is also provided with a discharge mechanism that matches the cylinder (1).

2. A hydraulic cylinder with adaptive load adjustment function according to claim 1, characterized in that: A sealing sleeve (18) is fitted on the outer peripheral side of the piston (17), the sealing sleeve (18) matches the inner wall of the cavity, and a sealing ring (20) is provided at the contact point between the cylinder (1) and the piston rod (2).

3. A hydraulic cylinder with adaptive load adjustment function according to claim 2, characterized in that: The mounting assembly includes mounting holes (6) equidistantly spaced on the mounting base plate (4), and mounting screws (16) are provided in the mounting holes (6). The mounting assembly structure on the mounting top plate (5) is the same as the mounting assembly structure on the mounting base plate (4).

4. A hydraulic cylinder with adaptive load adjustment function according to claim 3, characterized in that: The flow assembly includes an upper flow pipe (10) and a lower flow pipe (11) disposed on the side wall of the hydraulic cylinder (7), and both the upper flow pipe (10) and the lower flow pipe (11) are connected to the cavity.

5. A hydraulic cylinder with adaptive load adjustment function according to claim 4, characterized in that: The discharge mechanism includes an oil storage tank (8) mounted on a connecting plate (3). An upper discharge pipe (12) and a lower discharge pipe (13) are sequentially mounted on the side wall of the oil storage tank (8). Both the upper discharge pipe (12) and the lower discharge pipe (13) are connected to the cavity.

6. A hydraulic cylinder with adaptive load adjustment function according to claim 5, characterized in that: The upper flow pipe (10), the lower flow pipe (11), the upper discharge pipe (12) and the lower discharge pipe (13) are all connected to the cylinder (1) through a connecting flange (15), and an electric control valve (14) is provided on one side of the connecting flange (15).

7. A hydraulic cylinder with adaptive load adjustment function according to claim 6, characterized in that: The oil storage tank (8) has a discharge pipe (9) at its bottom end on the side away from the lower discharge pipe (13).

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