Vehicle supporting leg assembly

Abstract

The utility model provides a vehicle leg assembly. The vehicle assembly comprises a cylinder body, and a piston cavity is formed in the cylinder body. The piston rod is inserted into the piston cavity, the end, extending into the piston cavity, of the piston rod is fixedly connected with a first sealing ring, the first sealing ring is arranged between the piston rod and the inner wall of the cylinder body and divides the piston cavity into a rod cavity and a rodless cavity, the rod cavity is used for being filled with inert gas, and the rodless cavity is used for being filled with hydraulic oil. A first hollow cavity is formed in the piston rod, a plurality of baffles are fixed in the first hollow cavity in the length direction of the piston rod and divide the first hollow cavity into a plurality of sub-middle cavities, and each sub-middle cavity is filled with a phase change material. According to the vehicle supporting leg assembly, the operation efficiency of the vehicle supporting leg can be improved, and abrasion of the assembly is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to a vehicle outrigger assembly. BACKGROUND

[0002] The vehicle outrigger is an important component of engineering machinery, special vehicles and other equipment, which has a key support and stability function. The main purpose of the vehicle outrigger is to increase the support area of the vehicle and improve its stability during operation, prevent the vehicle from tipping over due to excessive load or uneven force, and ensure the safety and reliability of the operation. It can evenly transmit the weight of the vehicle and the operating load to the ground, reduce the dependence on tires, reduce the burden on tires during operation, and avoid damage or sinking of tires due to excessive force. In addition, the vehicle outrigger can also adjust its length or angle to keep the vehicle level on uneven ground, creating favorable conditions for normal operation of the vehicle. The hydraulic outrigger is a widely used form of vehicle outrigger, which uses a hydraulic system to provide power for the extension and lifting of the outrigger. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a vehicle outrigger assembly, which can improve the operation efficiency of the vehicle outrigger and reduce the wear of the assembly.

[0004] Specifically, the present application is realized by the following technical solutions:

[0005] The present application provides a vehicle outrigger assembly, comprising

[0006] The cylinder body is internally provided with a piston cavity;

[0007] The piston rod is inserted into the piston cavity, and the end of the piston rod extending into the piston cavity is fixedly connected with a first sealing ring, and the first sealing ring is arranged between the piston rod and the inner wall of the cylinder body, and the first sealing ring divides the piston cavity into a rod cavity and a rodless cavity, the rod cavity is used to fill inert gas, and the rodless cavity is used to pass in hydraulic oil;

[0008] The inside of the piston rod is provided with a first hollow cavity, along the length direction of the piston rod, a plurality of baffles are fixedly arranged in the first hollow cavity, a plurality of the baffles divide the first hollow cavity into a plurality of sub-intermediate cavities, and each sub-intermediate cavity is filled with a phase change material.

[0009] Optionally, a plurality of the baffles are arranged obliquely relative to the axial direction of the piston rod.

[0010] Optionally, a plurality of the baffles include two first baffles and a second baffle adjacent to each other, the first baffle and the second baffle are symmetrically arranged, and a plurality of the baffles are composed of a plurality of groups of the first baffle and the second baffle.

[0011] Optionally, the vehicle leg assembly further comprises:

[0012] a second sealing ring fixedly connected with the piston rod in the rod cavity and separating the rod cavity into a first cavity and a second cavity, the cavity between the second sealing ring and the first sealing ring being the second cavity, the first cavity being used to fill inert gas,

[0013] the second sealing ring comprising a bracket and an elastic sealing element, the bracket being provided with a through-opening, one end of the through-opening being directed towards the first cavity and the other end being directed towards the inner wall of the cylinder body, the elastic sealing element being filled in the through-opening, the elastic sealing element being configured to be pressed by the inert gas in the first cavity and abut against the inner wall of the cylinder body along the through-opening.

[0014] Optionally, the corner of the through-opening is rounded.

[0015] Optionally, the second cavity is filled with inert lubricating liquid.

[0016] Optionally, the end of the through-opening directed towards the first cavity is provided with a limiting piece, the limiting piece being fixed on the inner wall of the through-opening and protruding towards the inside of the through-opening, the end of the elastic sealing element directed towards the first cavity abutting against the limiting piece.

[0017] Optionally, the rod cavity is provided with a gas pressure sensor for detecting the gas pressure value in the rod cavity; and the rod cavity is connected with a gas storage tank, the gas storage tank being configured to control the rod cavity to supplement or release inert gas according to the gas pressure value detected by the gas pressure sensor.

[0018] The vehicle leg assembly provided by the present application uses a gas-liquid combination design, so that the piston rod moves more smoothly and quickly during extension and retraction. When extending, the pushing of the hydraulic oil can ensure that the piston rod extends with sufficient force and speed and quickly reaches the working position; when retracting, the pressure of the nitrogen gas and the assistance of the hydraulic pressure can make the piston rod retract quickly and accurately, reducing the retraction time and improving the operation efficiency of the vehicle leg. Further, by arranging the phase change material in the first hollow cavity, the heat generated by gas compression is absorbed, the wear of the assembly is reduced, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a side view of a vehicle support assembly according to an example embodiment of the present application;

[0020] Figure 2 is a cross-sectional view of a vehicle support assembly according to an example embodiment of the present application;

[0021] Figure 3 is a partial enlarged view of a cross-sectional view of a vehicle support assembly according to an example embodiment of the present application;

[0022] Figure 4 is a partial enlarged view of a cross-sectional view of a second sealing ring according to an example embodiment of the present application;

[0023] Figure 5 is a top view of a vehicle support assembly according to an example embodiment of the present application;

[0024] Figure 6 is a top view of a vehicle support assembly according to an example embodiment of the present application.

[0025] Wherein: cylinder 100, piston cavity 101, rod cavity 110, first cavity 111, second cavity 112, rodless cavity 120, shaft sleeve 130, piston rod 200, baffle 210, first baffle 211, second baffle 212, first hollow cavity 201, first sealing ring 300, second sealing ring 400, support 410, through hole 411, elastic sealing element 420, limiting piece 412, phase change material 500. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments (or, “modes of implementation”) of the present application will be described clearly and completely below with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0027] If the embodiments of the present application involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement conditions, etc. between the components in a certain specific posture (as shown in the drawings); if the specific posture changes, the directional indications or positional relationships also change accordingly. In addition, the embodiments of the present application involve the terms “first”, “second”, etc., which are only used for convenience of description and cannot be understood as indicating or implying relative importance.

[0028] The present application provides a vehicle support leg assembly, please refer to Figure 1 , Figure 2 and Figure 3The vehicle outrigger assembly comprises a cylinder body 100 and a piston rod 200. The cylinder body 100 is internally provided with a piston cavity 101. The piston rod 200 is inserted into the piston cavity 101, and the end of the piston rod 200 extending into the piston cavity 101 is fixedly connected with a first sealing ring 300. The first sealing ring 300 is arranged between the piston rod 200 and the inner wall of the cylinder body 100, and the first sealing ring 300 divides the piston cavity 101 into a rod cavity 110 and a rodless cavity 120. The rod cavity 110 is used to fill inert gas, and the rodless cavity 120 is used to introduce hydraulic oil. In the non-use state, that is, the compressed state, the piston rod 200 is inside the cylinder body 100, and the rod cavity 110 is filled with inert gas, which can be nitrogen, helium, argon, etc. Hereinafter, nitrogen is taken as an example for description.

[0029] When the vehicle outrigger assembly needs to be used, that is, during the extension process of the piston rod 200, hydraulic oil is pressed into the rodless cavity 120 to push the piston rod 200 to extend from the piston cavity 101, and at the same time, the volume of the rod cavity 110 becomes smaller, and the nitrogen inside is compressed. After use is completed, that is, during the retraction process of the piston rod 200, the piston rod 200 is retracted into the piston cavity 101, at which time the compressed nitrogen will generate a pressure to push the piston rod 200 to retract, thereby pushing the piston rod 200 to return and pressing the liquid oil out of the rodless cavity 120. The gas-liquid combined design of the vehicle outrigger assembly makes the action of the piston rod 200 during the extension and retraction process more stable and rapid. During extension, the pushing of the hydraulic oil can ensure that the piston rod 200 extends with sufficient force and speed, quickly reaching the working position; during retraction, the pressure of the nitrogen and the assistance of the hydraulic pressure can make the piston rod 200 quickly and accurately retract, reducing the retraction time and improving the operation efficiency of the vehicle outrigger. In addition, the use of nitrogen pressure to retract does not require additional consumption of a large amount of hydraulic energy to extract hydraulic oil, thereby reducing the load and energy loss of the hydraulic system and improving the energy efficiency ratio of the entire system.

[0030] Further, the inner part of the piston rod 200 is provided with a first hollow cavity 201, and a plurality of baffles 210 are fixed in the first hollow cavity 201 along the length direction X of the piston rod. The plurality of baffles 210 divide the first hollow cavity 201 into a plurality of sub-cavities, and each sub-cavity is filled with phase change material 500. When the temperature reaches the melting point of the phase change material 500, the material begins to change phase from solid to liquid. In this phase change process, the phase change material 500 will absorb a large amount of heat. During the use of the vehicle leg assembly, the nitrogen gas in the rod cavity 110 is compressed. The compression of the gas will generate heat, which can be absorbed by the phase change material 500 in the first hollow cavity 201. After absorbing heat, the phase change material 500 changes from solid to liquid. In the subsequent use process, the piston rod 200 is always extended outside the cylinder body 100. In this process, the liquid phase change material 500 can exchange heat with the outside through the piston rod 200, and release the heat generated by the compressed nitrogen gas to the outside. If the heat generated by the gas compression cannot be dissipated in time, the temperature of the cylinder body 100 and the piston rod 200 and other components will continue to rise, accelerating the wear of the components. Therefore, the present application can also reduce the wear of the assembly and prolong the service life. The phase change material 500 can be paraffin, lauric acid, etc.

[0031] The phase change material 500 is distributed in a plurality of sub-cavities, and the sub-cavities are separated by a plurality of baffles 210 along the length direction X of the piston rod. Therefore, the phase change material 500 is also distributed along the length direction X of the piston rod. The function of the baffle 210 is to prevent the phase change material 500 that has changed into liquid from accumulating together, and to make the phase change material 500 uniformly distributed in a plurality of sub-cavities, and uniformly absorb heat from the piston rod 200.

[0032] In an embodiment, the plurality of baffles 210 are arranged obliquely relative to the axial direction of the piston rod 200. The oblique arrangement of the plurality of baffles 210 can disperse the stress, reduce stress concentration, and improve the bending strength; and the plurality of baffles 210 can form a support structure to enhance stability and maintain straightness.

[0033] In an embodiment, the plurality of baffles 210 include two adjacent first baffles 211 and second baffles 212, the first baffles 211 and the second baffles 212 are symmetrically arranged, and the plurality of baffles 210 are composed of a plurality of groups of first baffles 211 and second baffles 212. Compared with the same direction oblique arrangement, the symmetric baffles 210 can prevent the phase change material 500 from gathering to one end when the piston rod 200 is extended and retracted, so as to ensure that the phase change material 500 in each sub-cavity can fully participate in the phase change process, and improve the utilization rate of the phase change material 500.

[0034] In an embodiment, in combination with Figure 3 and Figure 4, the vehicle leg assembly further comprises a second sealing ring 400. The second sealing ring 400 is fixedly connected with the piston rod 200 in the rod cavity 110, and separates the rod cavity 110 into a first cavity 111 and a second cavity 112. The cavity between the second sealing ring 400 and the first sealing ring 300 is the second cavity 112, and the first cavity 111 is used to fill inert gas.

[0035] The second sealing ring 400 comprises a bracket 410 and an elastic sealing element 420. The bracket 410 is provided with a through opening 411, one end of the through opening 411 is directed to the first cavity 111, and the other end is directed to the inner wall of the cylinder body 100. The elastic sealing element 420 is filled in the through opening 411. The elastic sealing element 420 is configured to be extruded by the inert gas in the first cavity 111, and to be pressed against the inner wall of the cylinder body 100 along the through opening 411. First, the second sealing ring 400 and the first sealing ring 300 can form double sealing, further guaranteeing the sealing effect, and avoiding the mixing of hydraulic oil and inert gas, which causes pollution.

[0036] During the extension of the piston rod 200, the pressure of the nitrogen gas will become larger and larger, and the gas may be extruded from the gap between the first sealing ring 300 and the inner wall of the cylinder body 100 to the inside of the rodless cavity 120. The present application increases the second sealing ring 400. Referring to the arrow direction in Figure 4 , the gas pressure of the nitrogen gas will push the elastic sealing element 420, and the elastic sealing element 420 will be guided by the through opening 411 to extrude the inner wall of the cylinder body 100 at the other end. The greater the gas pressure of the nitrogen gas, the greater the force of the elastic sealing element 420 extruding the inner wall of the cylinder body 100, and the better the sealing effect. The elastic sealing element 420 can be a rubber sealing element, a polyurethane sealing element, a thermoplastic sealing element, etc.

[0037] In an embodiment, in combination with Figure 4 , the corners of the through opening 411 are rounded (not shown in the figure). The rounded corners help to reduce the friction and wear of the elastic sealing element 420 in the through opening 411. And the setting of the rounded corners is conducive to the better adhesion of the elastic sealing element 420 to the inner wall of the through opening 411, improves the sealing effect, further prevents the leakage of inert gas, and mixes with the hydraulic oil.

[0038] In an embodiment, the second cavity 112 is filled with inert lubricating liquid. In the first cavity 111 filled with nitrogen gas, without lubricating liquid, dry friction is prone to occur, which causes the surface of the component to wear, the temperature to rise, and the performance to decline. Therefore, the second cavity 112 is filled with inert lubricating liquid, and during the reciprocating movement of the piston rod 200, the inert lubricating liquid forms a lubricating film between the piston rod 200 and the cylinder body 100, reducing the friction loss.

[0039] In an embodiment, in combination withFigure 4 The one end of the through hole 411 towards the first cavity 111 is provided with a limiting piece 412, which is fixed on the inner wall of the through hole 411 and protrudes towards the inside of the through hole 411. The elastic sealing element 420 abuts against the limiting piece 412 at the one end of the first cavity 111. The limiting piece 412 can pre-tighten the elastic sealing element 420, so that the elastic sealing element 420 abuts against the inner wall of the cylinder body 100 without being subjected to the gas pressure of the nitrogen gas, thereby ensuring the sealing performance during the whole operation.

[0040] In an embodiment, the rod cavity 110 is provided with a gas pressure sensor (not shown in the figure) for detecting the gas pressure value in the rod cavity 110; and the rod cavity 110 is connected with a gas storage tank, which is configured to control the rod cavity 110 to supplement or release the inert gas according to the gas pressure value detected by the gas pressure sensor. According to the change of the external temperature, the gas pressure of the inert gas can change with the temperature, so that the gas pressure in the rod cavity 110 is too high or too low compared with the required gas pressure for the operation of the vehicle support leg. At this time, the inert gas can be supplemented or released to the rod cavity 110 through the gas storage tank according to the detected gas pressure value. The gas pressure in the rod cavity 110 is ensured to be the required gas pressure for the operation.

[0041] In another embodiment, in combination with Figure 2 , Figure 5 and Figure 6 , the two ends of the cylinder body 100 are respectively connected with shaft sleeves 130, so that the cylinder body 100 can rotate. The shaft sleeve 130 is usually made of wear-resistant materials such as bearing steel, and the inner ring is tightly fitted with the rotating shaft of the cylinder body 100, and the outer ring is connected with the external fixed structure (such as a vehicle frame or a mounting bracket). This design enables the cylinder body 100 to realize smooth rotational motion under the support of the shaft sleeve 130.

[0042] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A vehicle leg assembly, characterized by, The utility model relates to a vehicle leg assembly Cylinder (100) is internally provided with piston cavity (101); Piston rod (200) is inserted in piston cavity (101), and the end of piston rod (200) that extends into piston cavity (101) is fixedly connected with first sealing ring (300), and first sealing ring (300) is arranged between piston rod (200) and the inner wall of cylinder (100), first sealing ring (300) divides piston cavity (101) into rod cavity (110) and rodless cavity (120), rod cavity (110) is used to fill inert gas, and rodless cavity (120) is used to pass into hydraulic oil; The inside of piston rod (200) is provided with first hollow cavity (201), a plurality of baffles (210) are fixed in first hollow cavity (201) along the length direction of piston rod (200), and a plurality of baffles (210) divide first hollow cavity (201) into a plurality of sub hollow cavities, and each sub hollow cavity is filled with phase change material (500).

2. The vehicle track assembly of claim 1, wherein, A plurality of baffles (210) are arranged obliquely relative to the axial direction of piston rod (200).

3. The vehicle wheel leg assembly of claim 2, wherein, A plurality of baffles (210) include two first baffles (211) and second baffles (212) adjacent to each other, the first baffles (211) and the second baffles (212) are symmetrically arranged, and a plurality of baffles (210) are composed of a plurality of groups of first baffles (211) and second baffles (212).

4. The vehicle track assembly of claim 1, wherein, The vehicle leg assembly further comprises: Second sealing ring (400) is fixedly connected with piston rod (200) in rod cavity (110) and divides rod cavity (110) into first cavity (111) and second cavity (112), the cavity between second sealing ring (400) and first sealing ring (300) is second cavity (112), and first cavity (111) is used to fill inert gas, Second sealing ring (400) includes support (410) and elastic sealing element (420), support (410) is provided with through opening (411), one end of through opening (411) faces first cavity (111), the other end faces the inner wall of cylinder (100), elastic sealing element (420) is filled in through opening (411), and elastic sealing element (420) is configured to be pressed against the inner wall of cylinder (100) along through opening (411) under the extrusion of inert gas in first cavity (111).

5. The vehicle wheel leg assembly of claim 4, wherein, The corners of the through opening (411) are rounded.

6. The vehicle wheel leg assembly of claim 4, wherein, Second cavity (112) is filled with inert lubricating liquid.

7. The vehicle wheel leg assembly of claim 4, wherein, The through hole (411) is provided with a limiting piece (412) at one end of the first cavity (111), the limiting piece (412) is fixed on the inner wall of the through hole (411) and protrudes towards the inside of the through hole (411), and the elastic sealing element (420) is abutted against the limiting piece (412) at one end close to the first cavity (111).

8. The vehicle wheel leg assembly of claim 1, wherein, The rod cavity (110) is provided with an air pressure sensor for detecting the air pressure value in the rod cavity (110); and the rod cavity (110) is connected with a gas storage tank, the gas storage tank is configured to control the rod cavity (110) to supplement or release inert gas according to the air pressure value detected by the air pressure sensor.

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