Light volume-variable corrugated pipe oil tank

Abstract

The utility model relates to the technical field of hydraulic pressure, and discloses a light volume-variable corrugated pipe oil tank which comprises an oil tank body and a corrugated pipe, an oil cavity is arranged in the oil tank body, an exhaust oil supplementing valve and an oil outlet connector are arranged on the end face of the oil cavity, and the corrugated pipe is made of plastic materials and arranged in the oil tank body. One end of the corrugated pipe is fixedly connected with one end of the oil tank body, and the size of an oil cavity in the oil tank body is changed when the corrugated pipe is stretched and compressed. According to the scheme, the corrugated pipe is made of plastic, so that the volume of the oil tank can be automatically changed according to the requirements of a system by stretching or compressing the corrugated pipe with very small pressure or suction force; the weight of the oil tank is greatly reduced, so that the requirement on light-weight occasions can be met; the compression rate and the stretching rate of the oil tank are greatly increased, the size of the oil tank can be remarkably reduced, and the requirement for small-size occasions can be met; the manufacturing difficulty and the manufacturing cost are reduced; the inner wall of the oil tank body guides the corrugated pipe to guarantee the movement direction of the corrugated pipe.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, specifically to a lightweight variable volume bellows oil tank. Background Technology

[0002] Existing variable volume oil tanks are all made of stainless steel. The top cover, base and middle bellows are made separately and then welded or bolted together into a whole. They can be used in micro hydraulic systems to replace bladder oil tanks. The principle is that the bellows can automatically adapt to the volume change of the oil in the micro hydraulic system by folding or expanding. However, since the material is stainless steel, it is heavy and cannot be used in projects with weight restrictions. In addition, it is difficult to manufacture and has high cost. Utility Model Content

[0003] The present invention aims to provide a lightweight variable volume bellows oil tank to solve the problems of large weight, high manufacturing difficulty and high cost of current variable volume oil tanks.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a lightweight variable volume corrugated pipe oil tank, comprising: an oil tank body and a corrugated pipe, wherein an oil cavity is provided in the oil tank body, and an exhaust and replenishment valve and an oil outlet connector are provided on the end face of the oil cavity, the corrugated pipe is made of plastic material, the corrugated pipe is disposed in the oil tank body, one end of the corrugated pipe is fixedly connected to one end of the oil tank body, the size of the oil cavity in the oil tank body is changed when the corrugated pipe is stretched and compressed, and the outer diameter of the corrugated pipe matches the inner diameter of the oil tank body.

[0005] The principle of this solution is as follows: The oil outlet of the oil chamber is connected to a hydraulic pump or hydraulic valve. When the hydraulic pump outputs oil to the actuator, the oil in the oil tank flows out from the oil outlet to the oil inlet of the hydraulic pump, and the bellows is compressed or stretched with the oil. When the oil of the actuator flows back to the oil tank from the oil outlet through the hydraulic pump or hydraulic valve, the bellows is stretched or compressed with the oil, and the volume of the oil chamber in the oil tank changes with the output or containment of the hydraulic system.

[0006] Advantages of this solution: The bellows in this solution is made of plastic, requiring only a small amount of pressure or suction to automatically change the tank volume according to system needs through the stretching or compression of the bellows; the plastic material of the bellows significantly reduces the weight of the tank, meeting the requirements for lightweight applications; compared to stainless steel bellows tanks, this solution significantly increases the tank's compression and stretching rates, resulting in a substantial reduction in tank volume, meeting the requirements for compact applications; the plastic material of the bellows reduces manufacturing difficulty and cost; the plastic bellows structure, compared to traditional bladder tanks, allows for real-time monitoring of tank volume changes; the outer diameter of the bellows matches the inner diameter of the tank, and the bellows moves along the inner wall of the tank, with the inner wall guiding the bellows and ensuring its direction of movement.

[0007] Preferably, the bellows is closed at both ends, and the inner cavity of the bellows forms an oil chamber. The exhaust and oil replenishment valve and the oil outlet connector are disposed on the end face of the bellows. The oil chamber formed inside the bellows changes its internal space size when the bellows is compressed or stretched, thereby changing the volume of the oil tank.

[0008] Preferably, the fuel tank body is made of plastic or aluminum alloy. This can further reduce weight and manufacturing costs.

[0009] Preferably, the bellows is open at the connection end with the fuel tank and is closed to the fuel tank; the other end of the bellows is closed, and the other end of the fuel tank is provided with a cover plate. The cover plate, the inner wall of the fuel tank, and the outer wall of the bellows form an oil cavity. The exhaust and oil replenishment valve and the oil outlet connector are located at the closed end of the bellows and on the cover plate. When the bellows is compressed or stretched, the distance between it and the cover plate changes, thereby changing the fuel tank volume.

[0010] Preferably, the fuel tank body and cover are made of plastic or aluminum alloy. This can further reduce weight and manufacturing costs.

[0011] Preferably, the exhaust oil replenishment valve and the oil outlet connector are located on the closed end of the bellows and the end face of the cover plate.

[0012] Preferably, the system also includes a sensor mounting plate and a displacement sensor. The sensor mounting plate is fixed to the oil tank body, and one end of the displacement sensor is mounted on the movable end of the bellows. By monitoring the real-time position of the movable end of the bellows using the displacement sensor, the change in oil volume within the oil tank can be monitored in real time.

[0013] Preferably, the displacement sensor axis, the bellows axis, and the oil tank axis are coincident or parallel. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0015] Figure 2 This is a cross-sectional schematic diagram of Embodiment 1 of the present utility model.

[0016] Figure 3 This is a schematic diagram of the bellows and displacement sensor in Embodiment 1 of this utility model.

[0017] Figure 4 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0018] Figure 5 This is a cross-sectional schematic diagram of Embodiment 2 of the present invention.

[0019] Figure 6 This is a schematic diagram of the bellows and displacement sensor in Embodiment 2 of this utility model. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] The reference numerals in the accompanying drawings include: 1. oil tank body; 2. bellows; 3. oil chamber; 4. exhaust and replenishment valve; 5. oil outlet connector; 6. displacement sensor; 7. sensor mounting plate; and 8. cover plate.

[0022] Example 1:

[0023] A lightweight variable volume bellows oil tank, such as Figure 1 , Figure 2 and Figure 3 As shown, the system includes: a fuel tank body 1 and a bellows pipe 2. The fuel tank body 1 has an oil cavity 3 inside. The bellows pipe 2 is disposed inside the fuel tank body 1, with one end fixedly connected to one end of the fuel tank body 1. The bellows pipe 2 is closed at both ends, and the inner cavity of the bellows pipe 2 forms the oil cavity 3. The oil cavity 3 formed inside the bellows pipe 2 changes its internal space size when the bellows pipe 2 is compressed or stretched, thereby changing the volume of the fuel tank.

[0024] The bellows 2 and the oil tank 1 are connected by bolts. Specifically, the bellows 2 and the oil tank 1 are fixedly connected at their edges with a connecting part. The connecting part has a first connecting hole, and the oil tank 1 has a second connecting hole that matches the first connecting hole. The first and second connecting holes are used to install bolts. In this embodiment, there are six connecting parts, which are evenly distributed on the bellows 2 and are integrally formed with the bellows 2.

[0025] The oil chamber 3 is equipped with an exhaust and replenishment valve 4 and an oil outlet connector 5 at both ends, respectively. The exhaust and replenishment valve 4 and the oil outlet connector 5 are respectively located at both ends of the bellows 2, and are positioned opposite each other. The oil outlet of the oil chamber 3 is connected to a hydraulic pump or a hydraulic valve. When the hydraulic pump outputs oil to the actuator, the oil in the oil tank flows out from the oil outlet to the suction port of the hydraulic pump, and the bellows 2 is compressed with the oil. When the oil of the actuator flows back to the oil tank from the oil outlet through the hydraulic pump or hydraulic valve, the bellows 2 is stretched with the oil, and the volume of the oil chamber 3 in the oil tank changes with the output or the volume of the solution contained in the hydraulic system.

[0026] The outer diameter of the bellows 2 matches the inner diameter of the oil tank 1. The bellows 2 moves along the inner wall of the oil tank 1, and the inner wall of the oil tank 1 guides the bellows 2 to ensure the direction of movement of the bellows 2.

[0027] Among them, the bellows 2 is made of plastic, which significantly increases the compression and elongation ratio compared to the stainless steel bellows 2 fuel tank, thus significantly reducing the volume of the fuel tank and meeting the requirements of applications requiring small volume; only a small amount of pressure or suction is needed to automatically change the fuel tank volume according to the system needs through the stretching or compression of the bellows 2; the use of a plastic bellows structure, compared to the traditional bladder fuel tank, allows for real-time monitoring of changes in the fuel tank volume 1; the use of plastic for the bellows 2 significantly reduces the weight of the fuel tank, meeting the requirements of applications requiring lightweight; the use of plastic for the bellows 2 also reduces the manufacturing difficulty and cost.

[0028] The fuel tank body 1 is made of plastic or aluminum alloy. This can further reduce weight and manufacturing costs.

[0029] It also includes a sensor mounting plate 7 and a displacement sensor 6. The sensor mounting plate 7 is fixed to the oil tank body 1, and one end of the displacement sensor 6 is mounted on the movable end of the bellows 2. The displacement sensor 6 is mounted on the sensor mounting plate 7. The axis of the displacement sensor 6, the axis of the bellows 2, and the axis of the oil tank body 1 are coincident or parallel. By monitoring the real-time position of the movable end of the bellows 2 through the displacement sensor 6, the change in the oil volume in the oil tank can be monitored in real time.

[0030] In this embodiment, the lower end of the bellows 2 is fixedly connected to the lower end of the oil tank 1, and the displacement sensor 6 is connected to the upper end of the bellows 2.

[0031] The bellows 2 is equipped with a mounting base for positioning and installing the displacement sensor 6.

[0032] Example 2:

[0033] The difference between this embodiment and Embodiment 1 lies in the different oil chamber structure and the different mounting ends of the displacement sensor 6 on the bellows 2. Figure 4 , Figure 5 and Figure 6 As shown, the bellows 2 is open at the connection end with the oil tank 1 and is closedly connected to the oil tank 1; the other end of the bellows 2 is closed, and the other end of the oil tank 1 is provided with a cover plate 8. The cover plate 8, the inner wall of the oil tank 1, and the open end of the bellows 2 form an oil cavity 3. The closed end of the bellows 2 fits with the inner wall of the oil tank 1. The exhaust and replenishment valve 4 and the oil outlet connector 5 are provided on the closed end of the bellows 2 and the cover plate 8. The cover plate 8, the inner wall of the oil tank 1, and the outer wall of the bellows 2 form an oil cavity 3. When the bellows 2 is compressed or stretched, the distance between it and the cover plate 8 is changed, thereby changing the volume of the oil tank.

[0034] The cover plate 8 is made of plastic or aluminum alloy. This can further reduce weight and manufacturing costs.

[0035] In this embodiment, the upper end of the bellows 2 is connected to the oil tank 1 and forms a seal. The exhaust oil replenishment valve 4 is located at the upper part of the lower end of the bellows 2. The oil outlet connector 5 is located in the middle of the cover plate 8. The displacement sensor 6 is located at the upper part of the lower end of the bellows 2.

[0036] This invention designs a lightweight variable-volume oil tank with a plastic bellows 2, which can replace stainless steel bellows oil tanks and bladder oil tanks to automatically adapt to changes in the volume of oil in a micro hydraulic system, and significantly reduce the weight of the oil tank. At the same time, it reduces the cost of manufacturing the oil tank. This oil tank is available in two forms: oil storage inside the bellows and oil storage outside the bellows, which can adapt to more application scenarios.

[0037] The above descriptions are merely embodiments of this utility model, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lightweight variable volume bellows oil tank, characterized in that, include: The oil tank body and the bellows are provided. The oil tank body has an oil cavity inside. The oil cavity end face is provided with an exhaust oil replenishment valve and an oil outlet connector. The bellows is made of plastic material and is installed in the oil tank body. One end of the bellows is fixedly connected to one end of the oil tank body. When the bellows is stretched and compressed, it changes the size of the oil cavity in the oil tank body. The outer diameter of the bellows matches the inner diameter of the oil tank body.

2. The lightweight variable volume bellows oil tank according to claim 1, characterized in that: The bellows is closed at both ends, and the inner cavity of the bellows forms an oil chamber. The exhaust oil supply valve and the oil outlet connector are located on the end face of the bellows.

3. A lightweight variable volume bellows oil tank according to claim 1, characterized in that: The fuel tank body is made of plastic or aluminum alloy.

4. A lightweight variable volume bellows oil tank according to claim 1, characterized in that: The corrugated pipe is open at the connection end with the oil tank and is closed to the oil tank; the other end of the corrugated pipe is closed, and the other end of the oil tank is provided with a cover plate. The cover plate, the inner wall of the oil tank and the outer wall of the corrugated pipe form an oil cavity. The exhaust oil replenishment valve and the oil outlet connector are located at the closed end of the corrugated pipe and the cover plate.

5. A lightweight variable volume bellows oil tank according to claim 4, characterized in that: The fuel tank body and cover are made of plastic or aluminum alloy.

6. A lightweight variable volume bellows oil tank according to claim 4, characterized in that: The exhaust oil replenishment valve and the oil outlet connector are located on the closed end of the bellows and the end face of the cover plate.

7. A lightweight variable volume bellows oil tank according to claim 1, characterized in that: It also includes a sensor mounting plate and a displacement sensor. The sensor mounting plate is fixed to the oil tank body, and one end of the displacement sensor is installed on the movable end of the bellows. The displacement sensor is mounted on the sensor mounting plate.

8. A lightweight variable volume bellows oil tank according to claim 7, characterized in that: The displacement sensor axis, the bellows axis, and the oil tank axis are coincident or parallel.

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