Hydraulic oil tank of large loader and machining method

Abstract

The invention discloses a hydraulic oil tank of a large loader and a processing method, solves the problem that the oil tank of the large loader is easy to damage in the prior art, and has the beneficial effect of effectively enhancing the strength of an oil tank body, and the specific scheme is as follows: the hydraulic oil tank of the large loader comprises the oil tank body which comprises a U-shaped component and a side wall component, the bottom, one side wall and the top of the fuel tank body are formed by the U-shaped component, the U-shaped component is an integrated piece, the U-shaped component can be connected with a frame, the side wall component is provided with a plurality of side wall plates, the side wall component is connected with the two sides of the long side of the U-shaped component respectively, and a plurality of stiffened plates are arranged in the side wall component in the height direction of the fuel tank body. A stiffened plate is also arranged at the connecting position of the side wall component and the U-shaped component, a concave part is arranged on a part of the stiffened plate at the connecting position of the side wall component and the U-shaped component, and the concave part is arranged towards the center of the oil tank body so as to avoid stress concentration.

Description

Technical Field

[0001] The invention relates to the field of loader hydraulic oil tanks, in particular to a large loader hydraulic oil tank and a processing method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] During the use of loaders, hydraulic pumps are usually used. The hydraulic pumps are connected to the hydraulic oil tank to supply oil to various structural parts. Large loaders are different from small and medium-sized loaders. They require a higher internal pressure in the tank to meet the oil suction requirements of the hydraulic pump. The internal pressure of large loaders is required to be 0.75 bar, and that of small and medium-sized loaders is 0.35 bar.

[0004] Large loaders have higher overall quality. During the operation of the loader, the vehicle accelerates and decelerates frequently, and the external impact on the hydraulic oil tank is greater. In addition, to be suitable for large loaders, the hydraulic oil tank capacity is required to be larger and the height is more than 1.5 meters. During the operation of the vehicle, the oil has a large impact on the tank. Therefore, for larger hydraulic oil tanks with higher pressure requirements, due to the greater impact of the oil on the tank, stress concentration is prone to occur in some positions, making the hydraulic oil tank easy to be damaged. In particular, the tank is welded with multiple plates in sequence, which not only affects the strength of the entire tank, but also easily cracks at the weld due to stress concentration. Welding multiple plates in sequence also affects the processing efficiency of larger tanks.

[0005] In order to solve the above technical problems in the prior art, the main means adopted is simply to add a stiffening plate on the outside or inside of the fuel tank. Simply adding a stiffening plate on the outside does not solve the problem of fuel tank strength, and the fuel tank liquid level height is usually in the middle and upper part of the fuel tank. Even if a stiffening plate is provided in part of the tank body, the structural setting of the stiffening plate is not given much consideration, and the problem of stress concentration caused by the oil inside the fuel tank on the fuel tank itself is not taken into account. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a large loader hydraulic oil tank that is easy to process and reduces the problem of stress concentration while ensuring the overall strength of the oil tank.

[0007] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0008] A large loader hydraulic oil tank comprises an oil tank body, wherein the oil tank body comprises a U-shaped member and a side wall member, wherein the U-shaped member constitutes the bottom, a side wall and the top of the oil tank body, the U-shaped member is an integral member, and the U-shaped member can be connected to a vehicle frame; the side wall member comprises a plurality of side wall plates, and the side wall member is respectively connected to both sides of a longer side of the U-shaped member; along the height direction of the oil tank body, a plurality of stiffening plates are arranged inside the side wall member, and a stiffening plate is also arranged at the connection between the side wall member and the U-shaped member; a recess is arranged on part of the stiffening plates at the connection between the side wall member and the U-shaped member, and the recess is arranged toward the center of the oil tank body to avoid stress concentration.

[0009] In a large loader hydraulic oil tank as described above, the side wall component includes three side wall plates, which are connected in sequence, and the transverse cross-section of the side wall component is U-shaped. Two side wall plates are arranged opposite to each other, and one side of the side wall plates is respectively connected to the longer side of the U-shaped component, and the other side wall plate is respectively connected to the side wall plates on both sides thereof.

[0010] In the large loader hydraulic oil tank as described above, the reinforced plates arranged along the height direction of the oil tank body are sequentially the first reinforced plate, the second reinforced plate and the third reinforced plate, and the distance between the adjacent two reinforced plates is arranged at a distance, and the distance between the first reinforced plate, the third reinforced plate and the corresponding end side of the U-shaped member is greater than the distance between the adjacent two reinforced plates;

[0011] The reinforcing plate provided at the connection between the side wall member and the U-shaped member is the fourth reinforcing plate, which is located on both sides of the side wall member, one of the fourth reinforcing plates is provided with the recess, and the fourth reinforcing plate is provided lower than the third reinforcing plate.

[0012] In the large loader hydraulic oil tank as described above, the stiffened plate is U-shaped along the cross-sectional direction of the oil tank body;

[0013] The width of the first stiffened plate is greater than that of the second stiffened plate and the third stiffened plate. The width of the second stiffened plate is the same as that of the third stiffened plate. The first stiffened plate is sharp near the longer side of the U-shaped member, which is conducive to cutting the oil and avoiding a large impact force of the oil on the first stiffened plate.

[0014] A large loader hydraulic oil tank as described above, further comprising an L-shaped partition plate, the L-shaped partition plate being vertically connected to the bottom of the U-shaped member, two sides of the L-shaped partition plate being respectively connected to adjacent two sides of the first stiffened plate, the longer side of the L-shaped partition plate being connected to the middle of the first stiffened plate, the shorter side of the L-shaped partition plate being connected to the side edge of the first stiffened plate, an oil return filter being arranged between the L-shaped partition plate and the first stiffened plate, and the top side of the L-shaped partition plate being connected to the second stiffened plate;

[0015] A concave portion is arranged on the top of the shorter side of the L-shaped partition plate to reduce the impact of the oil on the L-shaped partition plate.

[0016] In a large loader hydraulic oil tank as described above, a support plate is arranged on the side of the L-shaped partition plate away from the oil return filter, the support plate is connected to the first stiffened plate as a whole, and the support plate and the first stiffened plate are arranged in the same plane, the oil suction filter is supported by the bottom of the U-shaped member and the support plate, and a recess is arranged on the support plate toward the longer side of the U-shaped member to avoid stress concentration.

[0017] In a large loader hydraulic oil tank as described above, a first connecting member and a second connecting member are fixed to the outer side of the longer side of the U-shaped member, the first connecting member is arranged higher than the second connecting member, the first connecting member is U-shaped, the opening direction of the U-shaped first connecting member is arranged upward, the longitudinal cross-section of the second connecting member is U-shaped, the opening direction of the U-shaped second connecting member is arranged toward the tank body, and the first connecting member and the second connecting member are respectively provided with mounting holes for connection with the frame.

[0018] A large loader hydraulic oil tank as described above, wherein the inner side of the longer side of the U-shaped member supports a pipeline, and the longer side of the U-shaped member is provided with a connecting port, and the connecting port is connected to the corresponding pipeline respectively;

[0019] Lifting ears are respectively arranged on opposite sides of the side wall component.

[0020] In a large loader hydraulic oil tank as described above, an annular frame is fixed to the bottom of the U-shaped member, the side of the annular frame is fixedly connected to the bottom of the U-shaped member, the height of the first side of the annular frame is less than the height of the second side of the annular frame, the upper side of the second side is vertically connected to the first side, a protruding piece is arranged on the side of the second side close to the first side, the protruding piece is arranged with a groove facing the first side, and the side of the protruding block is fixedly connected to the second side of the annular frame.

[0021] In a second aspect, the present invention also provides a method for processing a large loader hydraulic oil tank, comprising the following contents:

[0022] Making a U-shaped member, the U-shaped member forming the bottom, one side wall and the top of the fuel tank body;

[0023] Making the side wall component: making a stiffened plate, fixing multiple stiffened plates inside the side wall component, and also setting a stiffened plate at the connection between the side wall component and the U-shaped component, and setting a concave portion on some stiffened plates at the connection between the side wall component and the U-shaped component;

[0024] The side wall member is connected to the U-shaped member to form the fuel tank body.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1) The oil tank in the present invention includes an oil tank body, and the oil tank includes an integrally formed U-shaped member. The integrally formed U-shaped member constitutes the top, bottom and a side wall of the oil tank body, and the welds are reduced. The integral U-shaped member ensures the overall strength of the oil tank body, and the U-shaped member can be connected to the frame. The overall oil tank body is divided into two parts by the U-shaped member and the side wall member, which is convenient for separate processing of the two parts, and then connected as one after separate processing, thereby effectively improving the processing efficiency of the oil tank; a plurality of reinforced plates are arranged in the oil tank body, and the arrangement of the reinforced plates effectively enhances the structural strength of the oil tank body, separates the oil when the oil flushes the oil tank body, and reduces the impact force of the oil on the oil tank body; a recess is arranged on part of the reinforced plates at the connection between the side wall member and the U-shaped member, and the arrangement of the recess effectively weakens the plate, which can play an effect of avoiding stress concentration.

[0027] 2) In the present invention, three stiffening plates are arranged on the side wall component. The stiffening plates are U-shaped and matched with the structure of the side wall component. This not only ensures the strength of the side wall component, but also facilitates the welding connection between the stiffening plates and the side wall component. The arrangement positions of the three stiffening plates are reasonable and matched with the height setting of the oil tank body. The stiffening plates effectively reduce the greater impact force caused by the oil on the side wall component.

[0028] 3) In the present invention, a fourth stiffening plate is arranged below the third stiffening plate, and the fourth stiffening plate connects the side wall member and the U-shaped member to ensure the connection strength between the two and avoid cracking of the weld at the connection between the two.

[0029] 4) The present invention sets an L-shaped partition plate at the bottom of the box body, and the L-shaped partition plate separates the return oil filter and the oil suction filter, so that the bubbles in the return oil extracted by the return oil filter can move upward first and be discharged, and will not be sucked into the oil suction pump through the oil suction filter, so as to avoid damage to the oil suction pump. The support plate is connected to the first stiffening plate as a whole, and the layout is reasonable. At the same time, the support plate is provided with a recess to reduce the problem of stress concentration.

[0030] 5) In the present invention, a first connecting member and a second connecting member are arranged on the longer side of the U-shaped member, so as to ensure a stable connection between the U-shaped member and the frame. An annular frame is arranged at the bottom of the U-shaped member. The annular frame structure is reasonably arranged, which can effectively protect the pipeline of the oil suction filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0032] Figure 1 It is a front view of a hydraulic oil tank for a large loader according to one or more embodiments of the present invention.

[0033] Figure 2The figure is a rear view of a hydraulic oil tank for a large loader according to one or more embodiments of the present invention.

[0034] Figure 3 is a side view of a hydraulic oil tank for a large loader according to one or more embodiments of the present invention.

[0035] Figure 4 It is a schematic diagram of the interior of a hydraulic oil tank of a large loader viewed from the side according to one or more embodiments of the present invention.

[0036] Figure 5 It is a schematic diagram of the interior of a hydraulic oil tank of a large loader viewed from the top according to one or more embodiments of the present invention.

[0037] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0038] Wherein: 1. side wall member, 2. annular frame, 3. lifting ear, 4. pipeline, 5. return oil filter, 6. oil suction filter, 7. fixing plate, 8. connecting port, 9. first connecting piece, 10. second reinforcing plate, 11. second connecting piece, 12. U-shaped member, 13. side wall plate, 14. protruding piece, 15. connecting port, 16. fourth stiffened plate, 17. recess, 18. supporting plate, 19. third stiffened plate, 20. second stiffened plate, 21. first stiffened plate, 22. L-shaped partition plate. DETAILED DESCRIPTION

[0039] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0040] 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 invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0041] As introduced in the background technology, in the prior art, there is a problem that the oil tank of a large loader is easily damaged. In order to solve the above technical problem, the present invention proposes a hydraulic oil tank for a large loader.

[0042] Embodiment 1

[0043] In a typical embodiment of the present invention, reference is made to Figure 1As shown, a large loader hydraulic oil tank includes a tank body, and the tank body includes a U-shaped member 12 and a side wall member 1. The U-shaped member 12 constitutes the bottom, a side wall and the top of the tank body. The U-shaped member 12 is an integral piece, and the U-shaped member 12 can be connected to the frame. The side wall member has a plurality of side wall plates 13. The side wall member 1 is respectively connected to both sides of the longer side of the U-shaped member 12. Along the height direction of the tank body, a plurality of stiffening plates are arranged inside the side wall member 1. A stiffening plate is also arranged at the connection between the side wall member 1 and the U-shaped member 12. A recess is arranged on part of the stiffening plates at the connection between the side wall member 1 and the U-shaped member 12. The recess is arranged toward the center of the tank body to avoid stress concentration. An oil filling port is arranged on one side of the U-shaped member 12, and a detachable sealing cover is arranged at the oil filling port.

[0044] It should be noted that reference Figure 2 As shown, a first connecting member 9 and a second connecting member 11 are fixed to the outer side of the longer side of the U-shaped member 12, the first connecting member 9 is arranged higher than the second connecting member 11, the first connecting member 9 is U-shaped, the opening direction of the U-shaped first connecting member is arranged upward, the inner side of the first connecting member 9 is welded to the U-shaped member 12, and a first mounting hole is arranged on the longer side of the first connecting member 9 for connection with the frame; the longitudinal section of the second connecting member 11 is U-shaped, the opening direction of the U-shaped second connecting member is arranged toward the fuel tank body, both side edges of the second connecting member 11 are welded to the fuel tank body, the second connecting member is arranged beyond the width direction of the fuel tank body, a second mounting hole is arranged on a side of the second connecting member 11 away from the fuel tank body, the second mounting hole is located at the part of the second connecting member that exceeds the fuel tank body, for easy installation, and the fuel tank body is fixed to the frame through the second mounting hole.

[0045] It can be understood that first reinforcing plates are respectively arranged on both sides of the first connecting member 9 close to the second connecting member 11, and two second reinforcing plates 10 are respectively arranged on the upper side and the lower side of the second connecting member. The structures of the first reinforcing plate and the second reinforcing plate are the same, and the first reinforcing plates are arranged opposite to each other. The two second reinforcing plates on the same side of the second connecting member 11 are also arranged opposite to each other. The specific structure of the first reinforcing plate and the second reinforcing plate 10 can be a right-angled triangle, and the right-angled triangle lacks a right angle. One right-angled plate of the first reinforcing plate and the second reinforcing plate 10 is respectively fixed to the first connecting member or the second connecting member.

[0046] Among them, multiple pipelines 4 are arranged inside the oil tank body, and a fixed plate 7 is arranged on the upper side of the first connecting member 9 of the U-shaped component 12. The fixed plate 7 is provided with multiple connecting ports 8. Each pipeline is connected with the connecting port of the fixed plate respectively, so that the pipeline can extract oil from the inside of the oil tank body; and a support bar is arranged on the inner side of the longer side of the U-shaped component, and the support bar supports each pipeline respectively.

[0047] refer to Figure 3As shown, the side wall component 1 includes three side wall plates 13, and the three side wall plates 13 are connected in sequence. The transverse cross-section of the side wall component 1 is U-shaped. The side wall plate 13 is arranged along the height direction of the oil tank body. The side wall plate 13 is connected to the U-shaped component 12. A stiffening plate is arranged inside the side wall plate 13. The stiffening plate is U-shaped so that the stiffening plate is connected to the three side wall plates. There are multiple stiffening plates, and a distance is set between adjacent two stiffening plates. Along the length direction of the side wall plate 13, three stiffening plates are specifically arranged, and the distance between the end side stiffening plate and the end side of the U-shaped component is greater than the distance between two adjacent stiffening plates.

[0048] Taking into account that it is more difficult to weld the side wall plate away from the longer side of the U-shaped member to the stiffened plate, a slot is set on the inner side of the side wall plate away from the longer side of the U-shaped member to engage and connect with each stiffened plate respectively; the side wall plate connected to the fourth stiffened plate is also provided with a slot for connection with the fourth stiffened plate, and the slot is formed by two convex strips set at intervals, and both ends of the slot are open.

[0049] Specifically, along the cross section of the fuel tank body in the width direction, the stiffened plate has a set width, and the stiffened plate increases in width at the connection between the adjacent two side panels. Figure 4 and Figure 5 As shown, the stiffened plate near the bottom of the fuel tank body is the first stiffened plate 21. The first stiffened plate 21 is sharp near the longer side of the U-shaped member. The inner side of the first stiffened plate 21 near the longer side of the U-shaped member is shorter than the outer side, so as to make room for the pipelines in the fuel tank body while enhancing the strength.

[0050] An L-shaped partition plate 22 is arranged in the fuel tank body, the L-shaped partition plate 22 is perpendicular to the bottom of the fuel tank body and is fixedly connected to the bottom of the U-shaped member, the two sides of the L-shaped partition plate are respectively connected to the first ribbed plate 21, the longer side of the L-shaped partition plate 22 is connected to the middle of the first ribbed plate, the shorter side of the L-shaped partition plate 22 is connected to the side of the first ribbed plate, an oil return filter 5 is arranged between the L-shaped partition plate 22 and the first ribbed plate 21, the top side of the L-shaped partition plate 22 is connected to the second ribbed plate 20, and the oil return filter 5 is arranged between the L-shaped partition plate 22 and the first ribbed plate 21. The oil filter 5 extends from the top of the U-shaped member 12 into the oil tank body, and the L-shaped partition plate 22 is arranged lower than the second stiffened plate 20 and connected to the second stiffened plate 20. Because the oil passing through the return oil filter 5 contains bubbles, the return oil filter 5 and the oil suction filter 6 are separated by the L-shaped partition plate 22, so that the bubbles in the oil returning to the oil tank body first come to the upper layer of the oil tank body and are discharged through the exhaust valve arranged on the top. After being discharged, the bubbles will not enter the oil suction pump.

[0051] Among them, an arc-shaped recess is set upward on the shorter side of the L-shaped partition plate 22, which plays a role in weakening the plate and reducing the impact of oil on the plate. The setting of the arc-shaped recess avoids sharp corners on the shorter side of the L-shaped partition plate, which can avoid the problem of stress concentration.

[0052] A support plate 18 is provided on the side of the L-shaped partition plate 22 away from the return oil filter. The support plate 18 is connected to the first stiffened plate 21 as a whole, and the support plate 18 and the first stiffened plate 21 are provided in the same plane. A recess 17 is provided on the support plate facing the longer side of the U-shaped member to weaken the plate, and the oil suction filter 6 is supported by the support plate and the bottom of the U-shaped member.

[0053] It is easy to understand that the second stiffened plate 20 in the middle has the same structure as the third stiffened plate 19 and the same width. The third stiffened plate 19 is provided with fourth stiffened plates 16 at both ends of the U-shaped member. The fourth stiffened plate connects one side of the U-shaped member with the side wall plate connected thereto. The fourth stiffened plate 16 is in the shape of a right triangle. The fourth stiffened plate 16 is provided lower than the third stiffened plate 19. The distance between the fourth stiffened plate 16 and the third stiffened plate 19 is less than the distance between the fourth stiffened plate and the second stiffened plate 20. Considering The height of the oil in the tank body and the distance between the fourth stiffened plate and the third stiffened plate are less than or equal to 5 mm. The fourth stiffened plate on one side is provided with an arc-shaped recess toward the center of the tank body, which also plays a role in weakening the plate to avoid stress concentration and also plays a role in buffering the impact force caused by the oil on the tank body. The fourth stiffened plate 16 on the other side can be provided with an arc-shaped recess, or be a right triangle, and the side of the third stiffened plate can be placed above the fourth stiffened plate or the side of the third stiffened plate is not located above the fourth stiffened plate 16.

[0054] In addition, it should be noted that the second stiffened plate 20 is usually located at the center position of the height direction of the tank body, the height between the second stiffened plate 20 and the first stiffened plate 21 is smaller than the height between the second stiffened plate 20 and the third stiffened plate, and the distance between the third stiffened plate and the top of the U-shaped member is 1 / 4-1 / 3 of the height of the tank body.

[0055] In this embodiment, the oppositely arranged side wall plates are respectively provided with lifting ears 3 on the top side, the lifting ears 3 are arranged obliquely outward relative to the side wall plates, and the lifting ears have openings to facilitate the connection of lifting equipment with the lifting ears to realize the lifting of the oil tank body.

[0056] It needs to be explained that the top of the U-shaped member 12 protrudes from the side wall plate to ensure the supporting strength of the top of the fuel tank body.

[0057] In addition, an oil drain port is provided at the bottom of the U-shaped member 12, and an annular frame is fixed to the outer side of the bottom of the U-shaped member 12, and the side of the annular frame is fixedly connected to the bottom of the U-shaped member 12. The annular frame 2 is a rectangular annular frame, and the height of the first side of the annular frame (the first side and the second connecting member are located in the same plane) is less than the height of the other sides of the annular frame. The annular frame 2 also includes a second side, and the upper side of the second side is vertically connected to the first side. A protrusion 14 is provided on the side of the second side close to the first side, and the protrusion 14 is provided with a groove facing the first side. The side of the protrusion 14 is fixedly connected to the second side of the annular frame. Because the oil suction filter extends from the bottom of the oil tank body, the pipeline of the oil suction filter (the pipeline is connected to the connecting port 15) is protected by the annular frame to play a mud barrier role, and the protrusion protects the curved pipeline.

[0058] Furthermore, a mounting block is arranged on the first side of the annular frame, and the mounting block is used for connection with the vehicle frame.

[0059] Embodiment 2

[0060] This embodiment provides a method for processing a hydraulic oil tank of a large loader, including the following contents:

[0061] A U-shaped member is manufactured, a first connecting member and a second connecting member are arranged on the outer side of a longer side of the U-shaped member, the second connecting member is arranged lower than the first connecting member, mounting holes are arranged on the first connecting member and the second connecting member, an oil inlet and an exhaust valve are arranged on the top of the U-shaped member, a fixing plate is arranged above the longer side of the U-shaped member, a plurality of connecting ports are arranged on the fixing plate, each pipeline is connected with the connecting port of the fixing plate respectively, the longer side of the U-shaped member supports the pipeline, the U-shaped member constitutes the bottom, a side wall and the top of the oil tank body, an oil return filter is installed through the top of the U-shaped member, the pipeline of the oil return filter is also connected with the connecting port at the fixing plate, the oil suction filter is supported through the bottom of the U-shaped member, a supporting plate connected with the first stiffening plate portion is arranged at one end of the oil suction filter, and the L-shaped partition plate is connected through the bottom of the U-shaped member and the supporting plate;

[0062] Making a stiffening plate, welding multiple stiffening plates inside two corresponding side wall plates, partially welding a first stiffening plate to the inner side of the side wall plate, setting a fourth stiffening plate at the connection between the U-shaped member and the side wall member, and setting a recess at one of the fourth stiffening plates;

[0063] The side wall panels are correspondingly arranged on the two sides of the U-shaped member, the side wall panels are welded to the U-shaped member, the fourth stiffened panel is welded to the side wall panels, and the first stiffened panel is welded to the L-shaped partition panel;

[0064] Connect the last side wall panel with the side wall panels on both sides thereof and the top and bottom of the U-shaped member to form the fuel tank body.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large loader hydraulic oil tank, characterized in that: The utility model comprises a fuel tank body, which comprises a U-shaped member and a side wall member. The U-shaped member constitutes the bottom, a side wall and the top of the fuel tank body. The U-shaped member is an integral part, and the U-shaped member can be connected to the vehicle frame. The side wall member has a plurality of side wall plates, and the side wall member is respectively connected to the two sides of the longer side of the U-shaped member. A plurality of stiffening plates are arranged inside the side wall member along the height direction of the fuel tank body, and a stiffening plate is also arranged at the connection between the side wall member and the U-shaped member. A recess is arranged on some of the stiffening plates at the connection between the side wall member and the U-shaped member, and the recess is arranged toward the center of the fuel tank body to avoid stress concentration.

2. A large loader hydraulic oil tank according to claim 1, characterized in that: The side wall component includes three side wall plates, which are connected in sequence. The transverse cross-section of the side wall component is U-shaped. Two side wall plates are arranged opposite to each other, and one side of the two side wall plates is respectively connected to the longer side of the U-shaped component, and the other side wall plate is respectively connected to the side wall plates on both sides thereof.

3. A large loader hydraulic oil tank according to claim 1, characterized in that: Along the height direction of the oil tank body, the stiffened plates are arranged in sequence as the first stiffened plate, the second stiffened plate and the third stiffened plate, and the distance between two adjacent stiffened plates is arranged at a distance, and the distance between the first stiffened plate, the third stiffened plate and the corresponding end side of the U-shaped member is greater than the distance between two adjacent stiffened plates; The reinforcing plate provided at the connection between the side wall member and the U-shaped member is the fourth reinforcing plate, which is located on both sides of the side wall member, one of the fourth reinforcing plates is provided with the recess, and the fourth reinforcing plate is provided lower than the third reinforcing plate.

4. A large loader hydraulic oil tank according to claim 3, characterized in that: Along the cross-sectional direction of the fuel tank body, the stiffening plate is U-shaped; The width of the first stiffened plate is greater than that of the second stiffened plate and the third stiffened plate. The width of the second stiffened plate is the same as that of the third stiffened plate. The first stiffened plate is sharp near the longer side of the U-shaped member.

5. A large loader hydraulic oil tank according to claim 3, characterized in that: It also includes an L-shaped partition plate, the L-shaped partition plate is vertically connected to the bottom of the U-shaped member, the two sides of the L-shaped partition plate are respectively connected to the adjacent two sides of the first stiffened plate, the longer side of the L-shaped partition plate is connected to the middle of the first stiffened plate, the shorter side of the L-shaped partition plate is connected to the side of the first stiffened plate, an oil return filter is arranged between the L-shaped partition plate and the first stiffened plate, and the top side of the L-shaped partition plate is connected to the second stiffened plate; A concave portion is arranged on the top of the shorter side of the L-shaped partition plate to reduce the impact of the oil on the L-shaped partition plate.

6. A large loader hydraulic oil tank according to claim 5, characterized in that: A support plate is arranged on the side of the L-shaped partition plate away from the oil return filter. The support plate is connected to the first stiffened plate as a whole, and the support plate and the first stiffened plate are arranged in the same plane. The oil suction filter is supported by the bottom of the U-shaped member and the support plate. A recess is arranged on the support plate toward the longer side of the U-shaped member to avoid stress concentration.

7. A large loader hydraulic oil tank according to claim 1, characterized in that: A first connecting member and a second connecting member are fixed to the outer side of the longer side of the U-shaped member, the first connecting member is arranged higher than the second connecting member, the first connecting member is U-shaped, the opening direction of the U-shaped first connecting member is arranged upward, the longitudinal cross-section of the second connecting member is U-shaped, the opening direction of the U-shaped second connecting member is arranged toward the tank body, and the first connecting member and the second connecting member are respectively provided with mounting holes for connection with the frame.

8. A large loader hydraulic oil tank according to claim 7, characterized in that: The inner side of the longer side of the U-shaped member supports a pipeline, and the longer side of the U-shaped member is provided with a communication port, which is connected to the corresponding pipeline respectively; Lifting ears are respectively arranged on opposite sides of the side wall component.

9. A large loader hydraulic oil tank according to claim 1, characterized in that: An annular frame is fixed to the bottom of the U-shaped member, and the side of the annular frame is fixedly connected to the bottom of the U-shaped member. The height of the first side of the annular frame is less than the height of the second side of the annular frame. The upper side of the second side is vertically connected to the first side. A protruding piece is arranged on a side of the second side close to the first side, and the protruding piece is provided with a groove facing the first side. The side of the protruding piece is fixedly connected to the second side of the annular frame.

10. A method for processing a large loader hydraulic oil tank according to any one of claims 1 to 9, characterized in that: It includes the following: Making a U-shaped member, the U-shaped member forming the bottom, one side wall and the top of the fuel tank body; Making the side wall component: making a stiffened plate, fixing multiple stiffened plates inside the side wall component, and also setting a stiffened plate at the connection between the side wall component and the U-shaped component, and setting a concave portion on some stiffened plates at the connection between the side wall component and the U-shaped component; The side wall member is connected to the U-shaped member to form the fuel tank body.

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