CN108757597B - Pressure stabilizing and pressurizing oil tank device - Google Patents

Abstract

The invention discloses a pressure-stabilizing and pressurizing oil tank device, which includes a pressurizing box assembly, a transmission adjustment component, and an oil circuit assembly; the pressurizing box assembly includes a movable pressurizing element, an upper pressing element, a lower pressing element, and an elastic The box body and the fixed pressurizing element; the upper pressing element and the lower pressing element are respectively placed on the top and bottom outer rings of the cylindrical parts at both ends of the elastic box body, and are arranged above the upper pressing element with its The connected mobile pressurizing element, and the fixed pressurizing element connected to it is arranged below the lower pressing element; the mobile pressurizing element, the upper pressing element, the lower pressing element, the elastic box and the fixed pressurizing element form a With a sealed oil tank structure, the transmission adjustment assembly is used to drive the mobile boosting element to move up and down; the oil circuit assembly is installed on the boosting box assembly.

Description

A pressure-stabilizing and boosting fuel tank device

Technical field

The invention relates to a pressure-stabilizing and pressurizing oil tank device for mobile robots and unmanned mobile mechanical platforms equipped with hydraulic transmission systems, and belongs to the technical field of mobile hydraulic systems.

Background technique

In the field of hydraulically driven mobile robots, such as heavy-duty quadruped robots, high-power exoskeleton robots, unmanned mobile combat platforms, etc., since the application scenarios are complex and changeable, during the work process, the machine body together with the hydraulic system The hydraulic oil tank will shake and tilt. During this process, the oil suction pipe of the oil tank is easily exposed above the liquid level, causing air to be sucked into the hydraulic system, damaging precision hydraulic components, and easily causing transmission instability. In addition, such applications require components to be light in weight, small in size, and low in noise.

For this reason, a closed pressurized oil tank must be used in such occasions. At present, pressurized fuel tanks are widely used in hydraulic systems in the aviation field, mainly including self-pressurized fuel tanks, air-bleed pressurized fuel tanks and spring pressurized fuel tanks. The boost pressure of a self-pressurized fuel tank is only related to the system pressure and is relatively constant. However, the fuel tank structure is extremely complex and requires high manufacturing, assembly and maintenance requirements. Moreover, due to the existence of the pressurized chamber, the overall fuel tank takes up a large space; the bleed air increases There is an air bag inside the hydraulic tank, which uses gas expansion to generate constant pressure in the hydraulic medium. However, a stable high-pressure air source is required, and the boost pressure will change greatly with temperature and hydraulic medium volume, making it difficult to meet the continuous and constant increase in pressure. The pressure requirements are high, and the introduction of the air source device results in large noise and volume, making it difficult to mount on a mobile robot platform; the spring booster tank uses the spring pushing action to push the piston and then exert pressure on the hydraulic medium in the other chamber. The structure is simple, but it is difficult to install on the mobile robot platform. As the spring compression decreases, the pressure of the hydraulic medium also decreases, making it impossible to achieve continuous constant pressure boosting and unable to meet the requirements of high-precision hydraulic transmission for robot applications. Moreover, these three types of pressurized fuel tanks are large in size and weight, have poor heat dissipation, and are not suitable for mounting on mobile hydraulically driven robot platforms. Most of the pressurized fuel tanks currently used on mobile robot platforms are smaller versions of the above three types of pressurized fuel tanks, and the existing problems are the same as above.

Contents of the invention

In view of the problems of existing hydraulic booster oil tanks, such as complex manufacturing, high cost, bulky size, large space occupation, poor constant pressure effect, and difficulty in mounting on mobile hydraulically driven robot platforms, the present invention proposes a lightweight, low-cost, and Stable pressure boosting fuel tank device with stable supercharging and good heat dissipation performance.

The voltage stabilizing and boosting fuel tank device of the present invention adopts the following technical solutions:

A pressure-stabilizing and boosting fuel tank device includes a boosting box component, a transmission adjustment component, and an oil circuit component;

The pressurizing box assembly includes a movable pressurizing element, an upper pressing element, a lower pressing element, an elastic box, and a fixed pressurizing element; the upper pressing element and the lower pressing element are respectively set in the elastic box. On the top and bottom outer rings of the cylindrical parts at both ends of the body, a mobile boosting element connected to the upper pressing element is arranged above the upper pressing element, and a fixed boosting element connected to the lower pressing element is arranged below the lower pressing element; The movable pressurizing element, the upper pressing element, the lower pressing element, the elastic box and the fixed pressurizing element form a sealed mailbox structure, and the transmission adjustment component is used to drive the mobile pressurizing element to move up and down; The above-mentioned oil circuit assembly is installed on the above-mentioned booster box assembly.

Furthermore, part of the cylinder is also fixed on the mobile boosting element and the fixed boosting element; the cylindrical parts on the movable boosting element and the fixed boosting element are respectively inserted into the inside of the cylindrical parts at both ends of the elastic box. , the upper pressing element, the lower pressing element and the two ends of the elastic box are pressed on the outer sides of the cylinders of the mobile boosting element and the fixed boosting element through connectors to form a sealed fuel tank.

Furthermore, the elastic box adopts a corrugated structure, and the material itself has a certain elasticity. Therefore, after the hose clamp is locked, both ends can be sealed.

Furthermore, the mobile boosting element, upper pressing element, and lower pressing element are all made of lightweight aluminum alloy materials, and the elastic box part is made of rubber or other elastic materials.

Furthermore, the oil circuit components are installed on the top and bottom of the booster box component, making the entire device highly symmetrical.

Further, the transmission adjustment assembly includes a top fixing element, a synchronous motor, an elastic coupling, a screw support, a screw, and a screw slider;

The synchronous motor is installed at the bottom of the fixed boosting element, and the screw supports at both ends of the screw are respectively installed on the top fixing element and the fixed boosting element; the top fixing element is fixed Installed above the mobile boosting element; the screw slider is connected to the mobile boosting element, the synchronous motor is connected to the screw through an elastic coupling and transmits power; the synchronous motor drives the screw to rotate, The rotation of the screw rod drives the screw slider to slide up and down, and the screw slider drives the movable pressurizing element to move up and down to achieve pressurization or decompression of the mailbox.

Further, the pressure-stabilizing and pressurizing oil tank device also includes a guide element, and the guide element includes a set of guide polished rods; the guide polished rods are arranged in an array along the circumferential direction of the elastic box, one end of which is connected to the said guide rod through a nut. On the fixed boosting element, the other end passes through the top of the mobile boosting element and is limited by a nut to realize the guiding function of the mobile boosting element.

Further, four of the light guide rods are connected to the top fixing element using nuts after passing through the mobile boosting element.

Furthermore, the guide polished rod has a symmetrical three-section structure, the middle section is made of a thin-walled stainless steel hollow polished pole or a hollow carbon fiber pole, and both ends are connected to a short section of studs.

Further, the oil circuit assembly includes a shock-resistant pressure gauge, an oil port joint, a one-way valve, and a pressure sensor; the shock-resistant pressure gauge is installed in the middle of the mobile boosting element, moves together with it, and displays the fuel tank pressure. The oil port joint is installed at the inlet and outlet of the oil tank, the one-way valve is installed on the oil port joint of the oil inlet, the pressure sensor is connected to the middle of the fixed boosting element, and in real time The pressure signal in the oil tank is transmitted to the controller, and the pressure signal is sent to the controller. The controller controls the transmission adjustment component to form a closed-loop adjustment system.

The invention has the following beneficial effects:

1. The plate components of the present invention can be made of aluminum alloy materials, the box part is made of elastic rubber material, and the guide elements are made of hollow thin-walled structures, which not only meets the strength and pressure resistance requirements, but also greatly reduces the weight of the entire device;

2. The elastic box of the present invention adopts a corrugated structure, which not only meets the elastic expansion and contraction function, but also has a large air contact area and good heat dissipation performance, and both ends of the elastic box directly use its own structure as a seal, avoiding additional sealing. Design, reduce costs;

3. The present invention uses the pressure sensor in the transmission adjustment assembly and the oil circuit assembly to form a closed-loop adjustment system, which can adjust the compression amount of the elastic box in real time, achieve the function of stable pressure increase, and at the same time have smaller operating noise.

Description of the drawings

The description and drawings that constitute a part of this application are used to provide a further understanding of this application. The illustrative embodiments and their descriptions of this application are used to explain this application and do not constitute an improper limitation of this application.

Figure 1 is an isometric schematic diagram of the present invention.

Figure 2 is a schematic side view of the present invention.

Figure 3 is a schematic structural diagram of the fixed boosting element of the present invention.

Figure 4 is a cross-sectional view of the elastic box structure of the present invention.

Figure 5 is a schematic structural diagram of the pressing element of the present invention.

Among them: 1. Top fixed component, 2. Shock-resistant pressure gauge, 3. Mobile boosting component, 4. Pressure component, 5. Guide polished rod, 6. Elastic box, 7. Fixed boosting component, 8. Hose clamp , 9. Synchronous motor, 10. Elastic coupling, 11. Screw support, 12. Screw, 13. Screw slider, 14. Oil port joint, 15. One-way valve, 16. Pressure sensor.

Detailed ways

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meanings commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. Furthermore, it will be understood that when the terms "comprises" and/or "includes" are used in this specification, they indicate The existence of features, steps, operations, devices, components and/or combinations thereof;

For the convenience of description, if the words "upper" and "lower" appear in the present invention, they only mean that the upper and lower directions are consistent with the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore is not to be construed as a limitation of the invention.

Terminology explanation part: The terms "installation", "connection", "connection", "fixing" and other terms in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can It can be a direct connection, or it can be an indirect connection through an intermediary. It can be an internal connection between two elements, or an interactive relationship between two elements. For those of ordinary skill in the art, the above terms can be understood in the present invention according to the specific circumstances. specific meaning.

As introduced in the background art, currently, pressurized fuel tanks are widely used in hydraulic systems in the aviation field, mainly including self-pressurized fuel tanks, air-bleed pressurized fuel tanks and spring pressurized fuel tanks. The boost pressure of a self-pressurized fuel tank is only related to the system pressure and is relatively constant. However, the fuel tank structure is extremely complex and requires high manufacturing, assembly and maintenance requirements. Moreover, due to the existence of the pressurized chamber, the overall fuel tank takes up a large space; the bleed air increases There is an air bag inside the hydraulic tank, which uses gas expansion to generate constant pressure in the hydraulic medium. However, a stable high-pressure air source is required, and the boost pressure will change greatly with temperature and hydraulic medium volume, making it difficult to meet the continuous and constant increase in pressure. The pressure requirements are high, and the introduction of the air source device results in large noise and volume, making it difficult to mount on a mobile robot platform; the spring booster tank uses the spring pushing action to push the piston and then exert pressure on the hydraulic medium in the other chamber. The structure is simple, but it is difficult to install on the mobile robot platform. As the spring compression decreases, the pressure of the hydraulic medium also decreases, making it impossible to achieve continuous constant pressure boosting and unable to meet the requirements of high-precision hydraulic transmission for robot applications. Moreover, these three types of pressurized fuel tanks are large in size and weight, have poor heat dissipation, and are not suitable for mounting on mobile hydraulically driven robot platforms. Most of the pressurized fuel tanks currently used on mobile robot platforms are reduced versions of the above three types of pressurized fuel tanks. The existing problems are the same as above. In order to solve the above technical problems, this application proposes a stabilized pressurized fuel tank. Device for hydraulically driven mobile robots or unmanned mobile mechanical platforms.

In a typical implementation of the present application, as shown in Figure 1, Figure 1 provides an isometric schematic diagram of the present invention. Including top fixed component 1, seismic pressure gauge 2, mobile boosting component 3, compression component 4, guide polished rod 5, elastic box 6, fixed boosting component 7, hose hoop 8, synchronous motor 9, elastic coupling 10 , screw support 11, screw 12, screw slider 13.

The two pressing elements 4 are placed on the outside of the cylindrical parts at both ends of the elastic box 6, and the cylindrical parts of the movable boosting element 3 and the fixed boosting element 7 are inserted into the inside of the cylindrical parts at both ends of the elastic box 6, using 2 pairs The hose clamp 8 respectively presses the two ends of the pressing element 4 and the elastic box 6 on the outer sides of the cylinders of the movable boosting element 3 and the fixed boosting element 7, and relies on the material properties of the elastic box 6 to form a sealed oil tank. , containing hydraulic medium inside;

One end of a set of guide polished rods 5 is connected to the fixed boosting element 7 through nuts, and is arranged in an array along the circumferential direction of the elastic box 6. The other end passes through the movable boosting element 3 and is equipped with a nut limiter; the guide polished rod There are four light guide rods connected to the top fixed element using nuts after passing through the mobile boosting element.

Furthermore, the guide polished rod has a symmetrical three-section structure. The middle section is made of thin-walled stainless steel hollow polished rod or hollow carbon fiber rod, and both ends are connected to a short section of studs; while meeting the requirements for strength and pressure resistance, it also greatly reduces the overall weight of the device.

Two synchronous motors 9 are symmetrically installed at the flanges on both sides of the fixed boosting element 7 through bolts. Two screw sliders 13 are symmetrically connected to the flanges on both sides of the movable boosting element 3 through screws. The top fixed element 1 is connected through nuts. Fixed on the upper ends of the four guide polished rods closest to the flange parts on both sides of the mobile boosting element 3; two pairs of screw supports 11 are symmetrically installed on both sides of the top fixed element 1 and the fixed boosting element 7, and are synchronized with the two respectively. The motor 9 is coaxial; two screw rods 12 are respectively installed on two pairs of screw rod supports 11, and the lower end of the screw rod 12 is connected to the synchronous motor 9 through an elastic coupling 10. During the operation of the device, the two synchronous motors 9 jointly output rotational power to drive the screw rod 12 to rotate, causing the screw slider 13 to move axially along the screw rod 12, and then drive the mobile boosting element 3 along the guide light rod 5. When moving down, the elastic box 6 is compressed, causing the pressure of the hydraulic medium inside to increase; the guide polished rods 5 arranged along the circumferential array not only guide the mobile boosting element 3, but also ensure that it will not move under any body shaking or fuel tank installation orientation. , the elastic box 6 will not cause expansion deviation during the process of being compressed. The stroke limit of the screw slider 13 itself is 5% larger than the compressible limit of the elastic box 6; the earthquake-resistant pressure gauge 2 is installed At the very center position of the movable pressure-resistant plate 3, it moves together with the movable pressure-resistant plate 3 to assist in displaying the pressure of the hydraulic medium.

The number of the above-mentioned synchronous motors 9 can be multiple. When the size and mass of the mailbox are relatively large, multiple synchronous motors can be used to drive the mobile boosting element 3 to move.

Figure 2 shows a schematic side view of the present invention, which more comprehensively demonstrates the installation of components at various locations. In addition to what is shown in Figure 1, it also includes an oil port connector 14, a one-way valve 15 and a pressure sensor 16. The oil port joint 14 is installed on the inlet and outlet of the fixed pressure plate 7 and is used to connect the oil pipe; the oil pipe joint 14 of the oil inlet is also connected with a one-way valve 15 to prevent the oil from being filled into the tank for the first time and during normal operation. The liquid flows back; the pressure sensor 16 is installed in the center of the fixed pressure plate 7 and is used to transmit the pressure signal in the tank to the controller in real time. As feedback, it forms a pressure closed loop with the synchronous motor 9. The controller relies on this pressure signal. The rotation of the synchronous motor 9 is controlled in real time, and the displacement of the movable pressure-resistant plate 3 is adjusted, so that the compression amount of the elastic box 6 meets the set fuel tank pressure requirement, thereby realizing the function of voltage stabilization and boosting.

Figure 3 is a schematic structural diagram of the fixed boosting element of the present invention. It can use components similar to a plate-like structure, specifically including a plate with a cylindrical part in the middle, flange parts symmetrically designed on both sides of the plate, and two oil ports and a small pressure test port in the middle; The pressure of this type of booster tank is generally around 2 bar, which is an ultra-low pressure working requirement. Therefore, the fixed booster element 7 is made of lightweight aluminum alloy or other lightweight waterproof and pressure-resistant materials.

It is worth mentioning that the structure of the movable boosting element 3 is basically similar to the fixed boosting element 7. The difference is that there is only a small pressure test port in the middle of the movable boosting element 3, and the flanges on both sides are smaller than those of the fixed boosting element 7. The flange is smaller, but the rest are the same, and the description of the drawings will not be repeated.

Figure 4 is a cross-sectional view of the elastic box structure of the present invention. The box adopts a corrugated tubular body and uses rubber or other elastic sealing materials to achieve elastic expansion and sealing functions. The larger corrugated area can better dissipate heat.

Figure 5 shows a schematic structural diagram of the pressing element of the present invention. The pressing element 4 is designed with a small cylindrical section in the middle and an inclined opening on the side, so it is not a closed disc, which is convenient for installation and locking of the hose clamp 8. In addition, the important function of the pressing element 4 is to transfer the pressing force It is evenly transmitted to the elastic box 6 to prevent the elastic box 4 from being cut by the hose hoop 8 .

When the pressure-stabilizing and boosting oil tank device of the present invention is implemented, it can be conveniently mounted on a hydraulically driven mobile robot or an unmanned mobile mechanical platform in any orientation. The hydraulic pump set and motor can be completely integrated on the fixed pressure-resistant plate 7 lower space. During normal operation, the pressure oil in the elastic box 6 reaches the hydraulic pump suction port through the oil outlet and filter, and the return oil of the entire hydraulic system finally flows back into the elastic box 6 through the one-way valve 15. This process According to the feedback signal of the pressure sensor 16, the controller adjusts the mobile boosting element 3 through the screw drive device in real time to compress the elastic box 6 downward along the guide rod 5 or release the elastic box 6 upward to stabilize the oil pressure in the box at the set value. value, and adapt to the volume changes of the hydraulic medium without being affected by the shaking of the box.

The material and structure of the present invention are relatively light, and the overall structure is compact. It is extremely convenient to manufacture and assemble, has low cost, strong reliability, and low noise. It can use a simple pressure closed loop to pressurize the oil in the box stably and in real time, without Affected by the external environment, the strong heat dissipation capability has outstanding advantages for hydraulic systems that are prone to heat, and has obvious technical effects.

The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims (8)

1. The pressure-stabilizing pressurizing oil tank device is characterized by comprising a pressurizing tank body assembly, a transmission adjusting assembly and an oil path assembly;

the pressurizing box body assembly comprises a movable pressurizing element, an upper compressing element, a lower compressing element, an elastic box body and a fixed pressurizing element; the upper pressing element and the lower pressing element are respectively sleeved on the top and bottom outer rings of the cylindrical parts at the two ends of the elastic box body, a movable pressurizing element connected with the upper pressing element is arranged above the upper pressing element, and a fixed pressurizing element connected with the lower pressing element is arranged below the lower pressing element; the movable pressurizing element, the upper compressing element, the lower compressing element, the elastic box body and the fixed pressurizing element form a sealed oil tank structure, and the transmission adjusting assembly is used for driving the movable pressurizing element to move up and down; the oil circuit component is arranged on the pressurizing box body component;

the transmission adjusting component comprises a top fixing element, a synchronous motor, an elastic coupling, a screw rod support, a screw rod and a screw rod sliding block;

the synchronous motor is arranged at the bottom of the fixed pressurizing element, and screw rod supports at two ends of the screw rod are respectively arranged on the top fixed element and the fixed pressurizing element; the top fixing element is fixedly arranged above the movable pressurizing element; the screw rod sliding block is connected with the movable pressurizing element, and the synchronous motor is connected with the screw rod through an elastic coupling and transmits power;

the oil circuit component comprises a shock-resistant pressure gauge, an oil port connector, a one-way valve and a pressure sensor; the shock-resistant pressure gauge is arranged in the middle of the movable pressurizing element, moves together with the movable pressurizing element and displays the pressure of the oil tank, the oil port connector is arranged at the oil inlet and the oil outlet of the oil tank, the one-way valve is arranged on the oil port connector of the oil inlet, the pressure sensor is connected to the middle of the fixed pressurizing element, and transmits pressure signals in the oil tank to the controller in real time and transmits the pressure signals to the controller, and the controller controls the transmission adjusting assembly to form a closed-loop adjusting system.

2. The pressure-stabilizing and pressurizing oil tank device as claimed in claim 1, wherein a part of cylinder is fixedly connected to the movable pressurizing element and the fixed pressurizing element; the cylinder parts on the movable pressurizing element and the fixed pressurizing element are respectively inserted into the inner sides of the cylinder parts at the two ends of the elastic box body, and the two ends of the upper compressing element, the lower compressing element and the elastic box body are respectively compressed on the outer sides of the cylinders of the movable pressurizing element and the fixed pressurizing element through connecting pieces, so that a sealed oil tank is formed.

3. The pressure stabilizing and pressurizing oil tank device as claimed in claim 1, wherein the elastic tank body adopts a corrugated structure, and the material has certain elasticity.

4. The pressure stabilizing and pressurizing oil tank device as claimed in claim 1, wherein the movable pressurizing element, the upper compressing element and the lower compressing element are made of light aluminum alloy materials, and the elastic tank body part is made of elastic materials.

5. The pressure regulating pressurized fuel tank assembly of claim 1, further comprising a guide member, said guide member comprising a set of guide polished rods; the guiding polished rods are arranged in an array along the circumferential direction of the elastic box body, one end of each guiding polished rod is connected to the fixed pressurizing element through a nut, and the other end of each guiding polished rod penetrates through the top of the movable pressurizing element and is fixed through the nut, so that the guiding effect on the movable pressurizing element is realized.

6. The pressure stabilizing and pressurizing oil tank apparatus as set forth in claim 5, wherein 4 of said guiding polish rods are connected to said top fixing member by nuts after passing through said movable pressurizing member.

7. The pressure stabilizing and pressurizing oil tank device as claimed in claim 5, wherein the guiding polished rod is of a symmetrical three-section structure, the middle section is a thin-wall stainless steel hollow polished rod or a hollow carbon fiber rod, and two ends of the guiding polished rod are respectively connected with a small section of stud.

8. The pressure stabilizing and pressurizing oil tank apparatus as claimed in claim 1, wherein said oil path assembly is installed at the top and bottom of the pressurizing oil tank assembly.