Side hydraulic oil tank

Abstract

The utility model relates to the technical field of engineering machinery oil ways, and provides a side hydraulic oil tank which comprises an oil tank body, a respirator arranged at the top of the oil tank body and used for balancing internal pressure of the oil tank body, an oil return chamber arranged in the oil tank body, the bottom of the oil return chamber communicated with the inside of the oil tank body, an oil outlet pipeline communicated with the oil tank body, and an oil inlet pipeline communicated with the oil return chamber. The oil return chamber is cylindrical, the side wall of the oil return chamber is communicated with an oil return pipe, the oil return pipe is communicated with an oil inlet pipeline, the oil return pipe is arranged to be a non-linear pipeline at least comprising one bend, an oil suction pipe is arranged in the oil tank body and communicated with an oil outlet pipeline, and a vertical partition plate is arranged on the inner wall of the oil tank body between the oil suction pipe and the oil return chamber; a drain outlet is formed in the bottom of the oil tank body below the partition plate. Impact of hydraulic oil on the oil return chamber can be reduced, the service life is prolonged, the overall strength is improved, high temperature of the hydraulic oil is prevented, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil circuits of construction machinery, and particularly relates to a side-mounted hydraulic oil tank. Background Art

[0002] The existing return oil pipeline of the side-mounted hydraulic oil tank of a loader basically adopts an inward return oil mode. This return oil mode has the advantages of compact volume and large filtering area. This return oil structure is generally equipped with a separate return oil chamber. The hydraulic oil enters the return oil chamber and is filtered by the return oil filter element in the return oil chamber. After filtering, it enters the working system through the suction pipe.

[0003] There is a return oil back pressure during the return oil process. The pressure resistance of the return oil chamber generally needs to be greater than 3.5 bar. The existing hydraulic oil tank forms a return oil chamber by welding a steel plate to the side plate of the oil tank. There is a stress concentration phenomenon at the weld. When the oil temperature is low and a large flow passes through, the impact of the return oil back pressure borne by the return oil chamber can reach 4.6 bar, which is easy to cause the deformation of the tank body, accelerate the fatigue failure of the weld, and cause hydraulic oil leakage; the hydraulic oil is connected to the return oil chamber through the return oil pipe. When a large flow passes through, the impact force directly acts, which is easy to affect the service life of the device; it is not conducive to the heat dissipation of the hydraulic oil inside the hydraulic oil tank; there is not enough time for the hydraulic oil to separate out bubbles, which is easy to cause cavitation phenomenon.

[0004] Therefore, in view of the above problems, a side-mounted hydraulic oil tank is proposed to solve the above problems. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model develops a side-mounted hydraulic oil tank. The utility model can avoid the failure of the weld caused by the return oil back pressure of the oil tank, effectively reduce the impact of the hydraulic oil on the return oil chamber, extend the service life, improve the overall strength, prevent the hydraulic oil from getting hot, and improve the practicability and service life of the device.

[0006] In order to achieve the above object, the utility model is realized through the following technical solutions:

[0007] A side-mounted hydraulic oil tank includes an oil tank body. A breather is arranged at the top of the oil tank body to balance the internal pressure of the oil tank body. A return oil chamber is arranged inside the oil tank body. The bottom of the return oil chamber is communicated with the inside of the oil tank body. The oil tank body is communicated with an oil outlet pipeline. The return oil chamber is communicated with an oil inlet pipeline. The return oil chamber is arranged in a cylindrical shape. The side wall of the return oil chamber is communicated with a return oil pipe. The return oil pipe is communicated with the oil inlet pipeline. The return oil pipe is arranged as a non-linear pipeline with at least one bend. A suction pipe is arranged inside the oil tank body. The suction pipe is communicated with the oil outlet pipeline. A vertical partition board is arranged on the inner wall of the oil tank body between the suction pipe and the return oil chamber. A sewage outlet is opened at the bottom of the oil tank body below the partition board.

[0008] Preferably, the top of the return oil chamber is connected to the top of the oil tank body through a flange. A return oil filter element is arranged inside the return oil chamber. A defoaming device is arranged at the bottom of the return oil chamber.

[0009] Preferably, the oil return pipe includes several straight pipes and bent pipes. The straight pipes and the bent pipes are welded to each other to form a U-shaped, S-shaped or M-shaped oil return pipe. One end is connected to the oil return chamber, and the other end is connected to the oil return block. The oil return block is arranged on the side wall of the oil tank body and is used to connect and collect the oil returns of different oil circuits.

[0010] Preferably, the partition plate is arranged in the lower half of the side wall of the oil tank body and is used to prevent the hydraulic oil discharged from the bottom outlet of the oil return chamber from being directly sucked away by the inlet of the oil suction pipe. A bent plate is arranged on the side edge of the partition plate in contact with the side wall of the oil tank body, and the bent plate connects the partition plate and the side wall of the oil tank body; the upper side edge of the partition plate is set as a concave arc shape 1, and the lower side edge of the partition plate is set as a concave arc shape 2, and the length of the arc shape 2 is the same as the diameter of the sewage discharge port.

[0011] Preferably, it further includes a support plate. One end of the support plate is arranged on the inner side wall of the oil tank body, and the other end of the support plate is arranged on the outer wall of the oil return chamber.

[0012] The effects provided in the utility model content are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solutions have the following advantages:

[0013] 1. By setting the oil return chamber as a cylindrical shape, the utility model reduces the welding structure of the oil return chamber and has more uniform stress, enhances the strength, and avoids the failure of the weld seam caused by oil return back pressure; at the same time, the oil return pipe is set as a non-linear pipe with at least one corner, effectively reducing the impact on the inside of the oil return chamber during oil return and extending the service life of the device;

[0014] 2. By setting the partition plate, the utility model can enhance the overall strength of the oil tank body, increase the path of the hydraulic oil in the oil tank body from the oil return chamber to the oil suction pipe, is beneficial to the precipitation of bubbles in the oil fluid, prevents cavitation phenomenon, is beneficial to the heat dissipation of the hydraulic oil, and prevents the hydraulic oil from being at a high temperature; the upper and lower side edges of the partition plate are set as arc shapes. The upper arc shape is used to reduce stress concentration and extend the service life of the partition plate, and the lower arc shape is used for avoidance when cleaning the bottom of the oil tank, improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. They are used to explain the utility model together with the embodiments of the utility model and do not constitute a limitation to the utility model.

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of an embodiment of the utility model Figure 1 ;

[0018] Figure 3Schematic diagram of the internal structure of an embodiment of the present utility model Figure 2 ;

[0019] Figure 4 Schematic diagram of the internal structure of the oil return chamber of an embodiment of the present utility model;

[0020] Figure 5 Schematic diagram of the structure of the partition plate of an embodiment of the present utility model.

[0021] In the figure, 1 is the oil tank body; 2 is the breather; 3 is the oil return chamber; 4 is the oil return pipe; 5 is the suction pipe; 6 is the partition plate; 7 is the sewage discharge port; 8 is the oil return filter element; 9 is the defoaming device; 10 is the straight pipe; 11 is the elbow pipe; 12 is the oil return block; 13 is the bent plate; 14 is the first arc shape; 15 is the second arc shape; 16 is the support plate. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1 - 5 shown, the present utility model provides a technical solution:

[0024] A side-mounted hydraulic oil tank is provided on a loader, which includes an oil tank body 1. A breather 2 is provided at the top of the oil tank body 1, and the breather 2 is used to balance the internal pressure of the oil tank body 1. An oil return chamber 3 is provided inside the oil tank body 1. The bottom of the oil return chamber 3 is open and communicates with the inside of the oil tank body 1. The oil tank body 1 communicates with an oil outlet pipeline, and the oil return chamber 3 communicates with an oil inlet pipeline. The oil return chamber 3 is set to be cylindrical. An oil return pipe 4 is communicated on the side wall of the oil return chamber 3. One end of the oil return pipe 4 away from the oil return chamber 3 communicates with the oil inlet pipeline. The oil return pipe 4 is set to be a non-linear pipeline with at least one bend. A suction pipe 5 is provided inside the oil tank body 1. The suction pipe 5 communicates with the oil outlet pipeline, and a vertical partition plate 6 is provided on the inner wall of the oil tank body 1 between the suction pipe 5 and the oil return chamber 3. The partition plate 6 is used to partially block the passage between the suction pipe 5 and the oil return chamber 3. A sewage discharge port 7 is opened at the bottom of the oil tank body 1 below the partition plate 6 for discharging the contaminated hydraulic oil after long-term use.

[0025] In this embodiment, the top of the oil return chamber 3 is connected to the top of the oil tank body 1 through a flange, and an oil cover is provided by bolts. An oil return filter element 8 is arranged inside the oil return chamber 3. The oil cover is detachable, which is convenient for replacing the oil return filter element 8. The oil return filter element 8 is cylindrical and sleeved inside the oil return chamber 3. Preferably, the axes of the oil return filter element 8 and the oil return chamber 3 are on the same straight line. An oil return cavity one is formed between the outer side wall of the oil return filter element 8 and the inner side wall of the oil return chamber 3. The oil return cavity one is used to accommodate the oil discharged from the oil return pipe 4. The hydraulic oil in the oil return cavity one enters the oil return cavity two surrounded by the inner side wall of the oil return filter element 8 after being filtered by the oil return filter element 8. The bottom of the oil return cavity two is communicated with the oil tank body 1. An air defoaming device 9 is arranged at the bottom of the oil return chamber 3. The air defoaming device 9 is used to eliminate the bubbles in the filtered hydraulic oil and reduce the cavitation phenomenon. Further preferably, both the oil return filter element 8 and the air defoaming device 9 can adopt common models on the market, which improves the economy of the device.

[0026] In another embodiment, an oil filling port is further opened at the top of the oil tank body 1. An oil filling cover is detachably arranged at the oil filling port, which is used to fill the hydraulic oil or replace the new hydraulic oil after discharging the contaminated hydraulic oil, improving the practicability of the device.

[0027] In this embodiment, the oil return pipe 4 includes a plurality of straight pipes 10 and bent pipes 11. The bending angle of the bent pipe 11 can be set as required. The straight pipe 10 and the bent pipe 11 are connected to each other by welding to form a U-shaped, S-shaped or M-shaped oil return pipe 4. Preferably, it can also be other shapes. The direct impact of the hydraulic oil on the oil return filter element 8 is reduced by the bent pipe 11. The more the bent pipes 11 are, the smaller the direct impact is, which improves the service life of the oil return filter element 8. One end of the oil return pipe 4 is communicated with the side wall of the oil return chamber 3, and the other end is communicated with the oil return block 12. The oil return block 12 is arranged on the side wall of the oil tank body 1 and is used to connect and concentrate the oil return of different oil circuits, improving the efficiency of the device.

[0028] In another embodiment, a fixing plate is arranged on the outer side wall of the oil return chamber 3. The fixing plate is connected to the oil return pipe 4 to make the position of the oil return pipe 4 stable, avoid the influence of the oil return impact on the oil return pipe 4 on the layout position of the oil return pipe 4, and improve the safety and stability of the device.

[0029] In this embodiment, the partition plate 6 is arranged in the lower half of the side wall of the oil tank body 1 to prevent the hydraulic oil discharged from the bottom outlet of the oil return chamber 3 from being directly sucked away by the inlet of the oil suction pipe 5. A bent plate 13 is arranged on the side edge of the partition plate 6 in contact with the side wall of the oil tank body 1. The bent plate 13 connects the partition plate 6 and the side wall of the oil tank body 1 to increase the strength and enhance the stability of the connection of the partition plate 6. The upper side edge of the partition plate 6 is set as a concave arc shape 14, and the arc shape 14 is used to reduce the stress concentration when the hydraulic oil crosses the upper side of the partition plate 6, avoid damaging the partition plate 6, and improve the service life of the partition plate 6. The lower side edge of the partition plate 6 is set as a concave arc shape 15, and the length of the arc shape 15 is the same as or slightly larger than the diameter of the sewage discharge port 7, so as to make way for cleaning the bottom of the fuel tank when draining oil from the sewage discharge port 7, making the oil drainage cleaner and improving the practicability of the device.

[0030] In another embodiment, it further includes a support plate 16. One end of the support plate 16 is arranged on the inner side wall of the oil tank body 1, and the other end of the support plate 16 is arranged on the outer wall of the oil return chamber 3, which is used to support the oil return chamber 3, avoid stress concentration and damage at the connection between the oil return chamber 3 and the oil tank body 1 caused by long-term impact of the oil return, and improve the service life and practicability of the device.

[0031] In another embodiment, a pedal is further arranged outside the oil tank body 1, which is convenient for the staff to inspect above the fuel tank, replace the oil return filter element 8 or supplement the hydraulic oil, and improves the practicability of the device.

[0032] Working principle: First, the hydraulic oil is concentrated from different oil circuits to the oil return block 12 and enters the oil return pipe 4 through the oil return block 12. Due to the bending shape of the oil return pipe 4, the impact of the hydraulic oil on the oil return filter element 8 in the oil return chamber 3 is reduced. At the same time, the cylindrical oil return chamber 3 is more evenly stressed, reducing the possibility of weld failure caused by oil return back pressure. The hydraulic oil in the oil return chamber 3 is filtered by the oil return filter element 8 and then defoamed by the defoaming device 9 and enters the bottom inside the oil tank body 1. Due to the attraction of the oil suction pipe 5 to the hydraulic oil, the hydraulic oil discharged from the defoaming device 9 flows towards the oil suction pipe 5. And due to the blockage of the partition plate 6, the hydraulic oil flows above the partition plate 6 and crosses the arc shape 14 to reach the inlet of the oil suction pipe 5, increasing the flow path of the hydraulic oil in the oil tank body 1 from the oil return chamber 3 to the oil suction pipe 5. The hydraulic oil has a heat dissipation path, preventing the situation that the use is affected by high temperature of the hydraulic oil. The contaminated hydraulic oil after long-term use can be discharged through the sewage discharge port 7.

[0033] The details not elaborated in the present utility model are all conventional technical means well known to those skilled in the art.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0036] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A side-mounted hydraulic oil tank, comprising an oil tank body (1), a breather (2) is arranged at the top of the oil tank body (1) for balancing the internal pressure of the oil tank body (1), an oil return chamber (3) is arranged inside the oil tank body (1), the bottom of the oil return chamber (3) communicates with the inside of the oil tank body (1), the oil tank body (1) communicates with an oil outlet pipeline, and the oil return chamber (3) communicates with an oil inlet pipeline, characterized in that, The oil return chamber (3) is arranged in a cylindrical shape. The side wall of the oil return chamber (3) is connected to the oil return pipe (4), and the oil return pipe (4) is connected to the oil inlet pipeline. The oil return pipe (4) is arranged as a non-linear pipe with at least one bend. An oil suction pipe (5) is arranged in the oil tank body (1), and the oil suction pipe (5) is connected to the oil outlet pipeline. A vertical partition plate (6) is arranged on the inner wall of the oil tank body (1) between the oil suction pipe (5) and the oil return chamber (3). A sewage discharge port (7) is opened at the bottom of the oil tank body (1) below the partition plate (6).

2. The side-mounted hydraulic oil tank according to claim 1, wherein: The top of the oil return chamber (3) is connected to the top of the oil tank body (1) through a flange. An oil return filter element (8) is arranged inside the oil return chamber (3), and an anti-foaming device (9) is arranged at the bottom of the oil return chamber (3).

3. The side-mounted hydraulic oil tank according to claim 2, characterized in that: The oil return pipe (4) includes several straight pipes (10) and bent pipes (11). The straight pipes (10) and the bent pipes (11) are connected to each other by welding to form a U-shaped, S-shaped or M-shaped oil return pipe (4). One end of the oil return pipe (4) is connected to the oil return chamber (3), and the other end is connected to an oil return block (12). The oil return block (12) is arranged on the side wall of the oil tank body (1) and is used for connecting and collecting the oil returns of different oil circuits.

4. The side-mounted hydraulic oil tank according to claim 3, wherein: The partition plate (6) is arranged in the lower half of the side wall of the oil tank body (1). A bent plate (13) is arranged on the side of the partition plate (6) in contact with the side wall of the oil tank body (1), and the bent plate (13) connects the partition plate (6) and the side wall of the oil tank body (1). The upper side of the partition plate (6) is arranged as a concave arc shape one (14), and the lower side of the partition plate (6) is arranged as a concave arc shape two (15), and the length of the arc shape two (15) is the same as the diameter of the sewage discharge port (7).

5. The side-mounted hydraulic oil tank according to claim 4, wherein: It further includes a support plate (16). One end of the support plate (16) is arranged on the inner side wall of the oil tank body (1), and the other end of the support plate (16) is arranged on the outer wall of the oil return chamber (3).

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