Electric hydraulic oil tank of miniature four-wheel-drive loader

Abstract

The utility model relates to the technical field of hydraulic oil tanks, in particular to an electric hydraulic oil tank of a miniature four-wheel-drive loader, which comprises an oil tank body and an oil inlet pipe communicated with the upper end of the oil tank body. The upper end of the oil inlet pipe communicates with an oil filling pipe, a filter pipe is arranged in the oil filling pipe, a first filter screen is fixed to the lower end in the filter pipe, the right side of the oil filling pipe communicates with a corrugated return pipe, the communicating position of the oil filling pipe and the corrugated return pipe is located below the filter pipe, and the end of the corrugated return pipe is rotationally connected and communicates with an external thread anti-overflow pipe. Hydraulic oil flows back into the oil filling pipe through cooperation of the external thread anti-overflow pipe and the corrugated backflow pipe, the situation that the hydraulic oil overflows out of the oil filling pipe due to untimely filtering is avoided, waste of the hydraulic oil is prevented, the effect that the hydraulic oil is normally filtered and added into the oil tank body is guaranteed, and the service life of the oil tank is prolonged. And hydraulic oil is prevented from overflowing the oil filling pipe in the adding process.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil tanks, in particular to an electric hydraulic oil tank for a miniature four-wheel drive loader. Background Art

[0002] The hydraulic oil tank is an important part of the loader. It is a container for storing the oil required to ensure the operation of the hydraulic system. The capacity of the oil tank is the effective volume of the oil tank when the oil level is 80% of the tank height. The refueling port is extended through an iron pipe to the height of the internal box port of the battery box to facilitate refueling operations, thereby preventing the occurrence of oil theft;

[0003] In order to prevent impurities and dust from entering the oil tank, the existing electric hydraulic oil tank of the micro four-wheel drive loader has a filter installed in the pipe mouth of the filling pipe. The filter filters out dust and impurities in the hydraulic oil to maintain the cleanliness of the hydraulic oil. However, as the use time of the filter continues to increase, the filter will become blocked. The blocked filter will cause the filtering performance to decrease. If the hydraulic oil is still continuously added to the oil tank through the pipe mouth of the filling pipe, the hydraulic oil will overflow from the filling pipe due to untimely filtration by the filter, thereby causing waste of hydraulic oil. Therefore, in the prior art, how to prevent the hydraulic oil from overflowing from the filling pipe during the adding process while ensuring that the hydraulic oil is normally filtered and added to the oil tank is an urgent problem to be solved. At the same time, the oil outlet of the existing hydraulic oil tank is at the bottom of the oil tank, and oil leakage occurs. The oil outlet diameter is too small, resulting in too small flow. Utility Model Content

[0004] The utility model provides an electric hydraulic oil tank for a miniature four-wheel drive loader, which is beneficial to ensuring that the hydraulic oil is normally filtered and added into the oil tank, and is beneficial to preventing the hydraulic oil from overflowing from a filling pipe during the adding process.

[0005] In order to solve the problems of the prior art, the utility model discloses an electric hydraulic oil tank for a miniature four-wheel drive loader, comprising an oil tank body and an oil inlet pipe, wherein the oil inlet pipe is connected to the upper end of the oil tank body;

[0006] The upper end of the oil inlet pipe is connected with a refueling pipe, a filter pipe is arranged in the refueling pipe, a first filter is fixed in the lower end of the filter, the right side of the refueling pipe is connected with a corrugated return pipe, and the connecting point between the refueling pipe and the corrugated return pipe is located below the filter, the end of the corrugated return pipe is rotatably connected and communicated with an externally threaded anti-overflow pipe, and a second filter is fixed in the externally threaded anti-overflow pipe;

[0007] The right side of the refueling pipe is provided with a first internal thread connection port, the right side of the filter tube is provided with a second internal thread connection port, the first internal thread connection port corresponds to the second internal thread connection port on the left and right, and the external thread overflow prevention pipe is threadedly connected to the second internal thread connection port;

[0008] A fixing ring is provided at the upper end of the refueling pipe, positioning rods are fixed on both the left and right sides of the lower end of the fixing ring, positioning holes are opened on both the left and right sides of the upper end of the refueling pipe, and the positioning rods are inserted into the positioning holes;

[0009] A "7"-shaped curved pipe is arranged in the oil tank body, one end of the curved pipe extends to the inner bottom end of the oil tank body, and the other end of the curved pipe penetrates out of the upper outer side of the oil tank body.

[0010] Furthermore, a pressure ring is fixedly sleeved on the periphery of the filter tube, a support ring sleeved on the periphery of the filter tube is fixedly provided on the inner wall of the refueling pipe, and a first sealing ring sleeved on the periphery of the filter tube is provided between the support ring and the pressure ring.

[0011] Furthermore, the refueling pipe is provided with an external sealing ring fixedly sleeved on the outer periphery of the externally threaded overflow prevention pipe, and the left side of the external sealing ring is fixed with an externally threaded connecting sleeve sleeved on the outer periphery of the externally threaded overflow prevention pipe, and the externally threaded connecting sleeve is threadedly connected to the first internally threaded connecting port.

[0012] Furthermore, a second sealing ring is provided between the outer sealing ring and the refueling pipe and is sleeved on the outer periphery of the external threaded connecting sleeve.

[0013] Furthermore, an inner sealing ring fixedly sleeved on the outer periphery of the externally threaded anti-overflow tube is provided outside the filter tube, and a third sealing ring sleeved on the outer periphery of the externally threaded anti-overflow tube is provided between the inner sealing ring and the filter tube.

[0014] Furthermore, the inner diameter of the first internally threaded connection port is greater than the inner diameter of the second internally threaded connection port, and the outer diameter of the inner sealing ring is smaller than the inner diameter of the first internally threaded connection port.

[0015] Furthermore, an oil dipstick is installed on the outside of the oil tank body.

[0016] Compared with the prior art, the utility model achieves the following beneficial effects:

[0017] 1. By adding hydraulic oil into the filter tube and then filtering out impurities and dust in the hydraulic oil through the first filter, the cleanliness of the hydraulic oil is maintained, which is beneficial to extending the service life of the hydraulic system;

[0018] 2. By setting the second filter, the externally threaded anti-overflow pipe and the corrugated return pipe, when the first filter is seriously blocked, the hydraulic oil will be filtered through the second filter, and then return to the filling pipe through the externally threaded anti-overflow pipe and the corrugated return pipe. The hydraulic oil is continuously added to the fuel tank body through the pipe opening of the filling pipe, so as to avoid the situation that the hydraulic oil overflows the filling pipe due to untimely filtration, prevent the waste of hydraulic oil, and ensure the normal filtration of the hydraulic oil and the effect of adding it to the fuel tank body, and prevent the hydraulic oil from overflowing the filling pipe during the addition process;

[0019] 3. By inserting the positioning rod into the positioning hole, it is convenient to quickly pre-install the filter tube into the refueling pipe, and the threaded connection between the external thread anti-overflow pipe and the second internal thread connection port not only prevents the corrugated reflux pipe and the external thread anti-overflow pipe from loosening, but also prevents the filter tube from loosening in the refueling pipe, effectively ensuring the normal use of the filter tube, the external thread anti-overflow pipe and the corrugated reflux pipe;

[0020] 4. The hydraulic oil is discharged by setting a bent pipe. Since the oil outlet of the bent pipe is located above the outer side of the oil tank body, it effectively avoids oil leakage from the bottom of the oil tank body and solves the problem of small flow rate caused by small oil outlet diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the overall planar structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the internal planar structure of the fuel filling pipe of the utility model;

[0024] Figure 4 A is a schematic diagram of the enlarged structure of the local area of ​​the utility model;

[0025] Figure 5 It is a schematic diagram of the enlarged structure of the B part of the utility model;

[0026] Figure 6 It is a schematic diagram of the overall top plan structure of the utility model;

[0027] Figure 7 It is a schematic diagram of the overall side planar structure of the utility model;

[0028] Figure 8 It is a schematic diagram of the internal planar structure of the oil tank body of the utility model from a side view.

[0029] Figure 1-8 In the figure: fuel tank body 1, fuel inlet pipe 2, fuel filling pipe 3, corrugated return pipe 4, oil dipstick 5, filter tube 6, fixing ring 7, positioning hole 8, positioning rod 9, first filter screen 10, support ring 11, pressure ring 12, first sealing ring 13, externally threaded anti-overflow pipe 14, external sealing ring 15, second filter screen 16, second sealing ring 17, first internally threaded connection port 18, externally threaded connection sleeve 19, internal sealing ring 20, third sealing ring 21, second internally threaded connection port 22, oil outlet pipe 23, elbow 24. DETAILED DESCRIPTION

[0030] An electric hydraulic oil tank for a mini four-wheel drive loader:

[0031] like Figure 1-7As shown, in this embodiment, it includes a fuel tank body 1 and an oil inlet pipe 2, the oil inlet pipe 2 is connected to the upper end of the fuel tank body 1, the upper end of the oil inlet pipe 2 is connected to a refueling pipe 3, a filter tube 6 is provided in the refueling pipe 3, a first filter screen 10 is fixed at the lower end of the filter tube 6, a corrugated return pipe 4 is connected to the right side of the refueling pipe 3, and the connecting point between the refueling pipe 3 and the corrugated return pipe 4 is located below the filter tube 6, the end of the corrugated return pipe 4 is rotatably connected and communicated with an externally threaded anti-overflow pipe 14, and a second filter screen 16 is fixed in the externally threaded anti-overflow pipe 14.

[0032] By adding hydraulic oil into the filter tube 6, and then filtering out impurities and dust in the hydraulic oil through the first filter screen 10, the cleanliness of the hydraulic oil is maintained, which is beneficial to extending the service life of the hydraulic system. By setting the second filter screen 16, the externally threaded anti-overflow pipe 14 and the corrugated return pipe 4, when the first filter screen 10 is seriously blocked, the speed of the hydraulic oil passing through the first filter screen 10 becomes slower, so the hydraulic oil will continue to rise in the filter tube 6 until the hydraulic oil rises to the pipe mouth of the externally threaded anti-overflow pipe 14, the hydraulic oil will be filtered through the second filter screen 16, and then The hydraulic oil returns to the filling pipe 3 through the externally threaded anti-overflow pipe 14 and the corrugated reflux pipe 4, and is finally added to the tank body 1 through the oil inlet pipe 2. Therefore, while the hydraulic oil is continuously added to the tank body 1 through the pipe opening of the filling pipe 3, it is assisted in circulation by the externally threaded anti-overflow pipe 14 and the corrugated reflux pipe 4, thereby avoiding the hydraulic oil overflowing from the filling pipe 3 due to untimely filtration, preventing the hydraulic oil from being wasted, and ensuring the normal filtration of the hydraulic oil and the effect of adding it to the tank body 1, and preventing the hydraulic oil from overflowing from the filling pipe 3 during the addition process.

[0033] like Figure 1 , 8 As shown, in this embodiment, a "7"-shaped curved pipe 23 is provided in the oil tank body 1, one end of the curved pipe 23 extends to the bottom end of the oil tank body 1, and the other end of the curved pipe 23 passes through the upper outer side of the oil tank body 1.

[0034] By providing a "7"-shaped elbow 23, when the hydraulic oil in the oil tank body 1 is discharged through the outlet elbow 23, the hydraulic oil enters through one end of the elbow 23, and then the hydraulic oil is discharged through the other end of the elbow 23. Since the other end of the elbow 23 passes through the upper outside of the outlet oil tank body 1, the elbow 23 discharges the hydraulic oil, solving the problem of the hydraulic oil being discharged from the bottom of the oil tank body 1, thereby effectively avoiding oil leakage from the bottom of the oil tank body 1, and solving the problem of too small flow rate caused by too small oil outlet diameter.

[0035] like Figure 3 , 4As shown in Figures 5 and 6, in this embodiment, a first internal threaded connection port 18 is provided on the right side of the refueling pipe 3, and a second internal threaded connection port 22 is provided on the right side of the filter tube 6. The first internal threaded connection port 18 corresponds to the second internal threaded connection port 22 on the left and right. The external threaded anti-overflow pipe 14 is threadedly connected to the second internal threaded connection port 22. A fixing ring 7 is provided on the upper end of the refueling pipe 3. Positioning rods 9 are fixed on the left and right sides of the lower end of the fixing ring 7. Positioning holes 8 are provided on the left and right sides of the upper end of the refueling pipe 3. The positioning rods 9 are inserted into the positioning holes 8. An outer sealing ring 15 is provided on the outside of the refueling pipe 3, which is fixedly sleeved on the outer periphery of the external threaded anti-overflow pipe 14. An external threaded connecting sleeve 19 sleeved on the outer periphery of the external threaded anti-overflow pipe 14 is fixed on the left side of the external sealing ring 15. The external threaded connecting sleeve 19 is threadedly connected to the first internal threaded connection port 18.

[0036] By inserting the positioning rod 9 into the positioning hole 8, it is convenient to quickly pre-install the filter tube 6 into the refueling pipe 3 to prevent the filter tube 6 from accidentally rotating in the refueling pipe 3. In addition, through the threaded connection between the externally threaded anti-overflow tube 14 and the second internally threaded connecting port 22, and the threaded connection between the externally threaded connecting sleeve 19 and the first internally threaded connecting port 18, it is not only convenient to prevent the corrugated reflux pipe 4 and the externally threaded anti-overflow pipe 14 from loosening, but also convenient to prevent the filter tube 6 from loosening in the refueling pipe 3, thereby effectively ensuring the normal use of the filter tube 6, the externally threaded anti-overflow pipe 14 and the corrugated reflux pipe 4.

[0037] like Figure 3 , 5 As shown, in this embodiment, a pressure ring 12 is fixedly sleeved on the periphery of the filter tube 6, a support ring 11 sleeved on the periphery of the filter tube 6 is fixedly provided on the inner wall of the refueling pipe 3, and a first sealing ring 13 sleeved on the periphery of the filter tube 6 is provided between the support ring 11 and the pressure ring 12.

[0038] By providing the first sealing ring 13 between the pressure ring 12 and the support ring 11, it is helpful to prevent external dust or impurities from entering the oil inlet pipe 2 through the gap between the filter tube 6 and the filling pipe 3, thereby better ensuring the cleanliness of the hydraulic oil.

[0039] like Figure 3 , 5 As shown, in this embodiment, a second sealing ring 17 is provided between the outer sealing ring 15 and the filling pipe 3 and is sleeved on the outer periphery of the external threaded connection sleeve 19 .

[0040] By arranging a second sealing ring 17 between the outer sealing ring 15 and the refueling pipe 3, the second sealing ring 17 is sealed at the connection between the external threaded connection sleeve 19 and the first internal threaded connection port 18, thereby preventing external dust and impurities from entering the refueling pipe 3 through the first internal threaded connection port 18.

[0041] like Figure 3 , 5As shown, in this embodiment, the filter tube 6 is provided with an inner sealing ring 20 fixedly sleeved on the outer periphery of the externally threaded anti-overflow tube 14, and a third sealing ring 21 sleeved on the outer periphery of the externally threaded anti-overflow tube 14 is provided between the inner sealing ring 20 and the filter tube 6.

[0042] By setting a third sealing ring 21 between the inner sealing ring 20 and the filter tube 6, the third sealing ring 21 is sealed at the connection between the externally threaded anti-overflow tube 14 and the second internally threaded connecting port 22, thereby preventing the hydraulic oil in the filter tube 6 from leaking out through the second internally threaded connecting port 22.

[0043] like Figure 1 As shown, in this embodiment, an oil dipstick 5 is installed on the outer side of the oil tank body 1.

[0044] By providing the oil dipstick 5, it is convenient for the operator to quickly observe the liquid level and oil quantity in the oil tank body 1, and replenish the hydraulic oil in time to ensure the normal operation of the loader.

[0045] like Figure 5 As shown, in this embodiment, the inner diameter of the first internal thread connection port 18 is larger than the inner diameter of the second internal thread connection port 22 , and the outer diameter of the inner sealing ring 20 is smaller than the inner diameter of the first internal thread connection port 18 .

[0046] By setting the inner diameter of the first internal threaded connection port 18 to be larger than that of the second internal threaded connection port 22, and setting the outer diameter of the inner sealing ring 20 to be smaller than the inner diameter of the first internal threaded connection port 18, the externally threaded anti-overflow tube 14 can be smoothly screwed into or out of the second internal threaded connection port 22, and the inner sealing ring 20 can be smoothly moved out of or into the first internal threaded connection port 18.

Claims

1. An electric hydraulic oil tank for a mini four-wheel drive loader, comprising an oil tank body (1) and an oil inlet pipe (2), wherein the oil inlet pipe (2) is connected to the upper end of the oil tank body (1), and is characterized in that: The upper end of the oil inlet pipe (2) is connected to a refueling pipe (3), a filter pipe (6) is arranged inside the refueling pipe (3), a first filter screen (10) is fixed at the lower end of the filter pipe (6), the right side of the refueling pipe (3) is connected to a corrugated return pipe (4), and the connecting point between the refueling pipe (3) and the corrugated return pipe (4) is located below the filter pipe (6), the end of the corrugated return pipe (4) is rotatably connected and communicated with an externally threaded anti-overflow pipe (14), and a second filter screen (16) is fixed inside the externally threaded anti-overflow pipe (14); The right side of the refueling pipe (3) is provided with a first internal thread connection port (18), the right side of the filter tube (6) is provided with a second internal thread connection port (22), the first internal thread connection port (18) and the second internal thread connection port (22) correspond to each other on the left and right, and the external thread overflow prevention pipe (14) is threadedly connected to the second internal thread connection port (22); The upper end of the refueling pipe (3) is provided with a fixing ring (7), and positioning rods (9) are fixed on both the left and right sides of the lower end of the fixing ring (7), and positioning holes (8) are opened on both the left and right sides of the upper end of the refueling pipe (3), and the positioning rods (9) are inserted into the positioning holes (8); A "7"-shaped curved pipe (23) is provided in the oil tank body (1), one end of the curved pipe (23) extends to the bottom end of the oil tank body (1), and the other end of the curved pipe (23) passes through the upper part of the outer side of the oil tank body (1).

2. The electric hydraulic oil tank for a mini four-wheel drive loader according to claim 1, characterized in that: A pressure ring (12) is fixedly sleeved on the periphery of the filter tube (6), a support ring (11) sleeved on the periphery of the filter tube (6) is fixedly mounted on the inner wall of the refueling pipe (3), and a first sealing ring (13) sleeved on the periphery of the filter tube (6) is provided between the support ring (11) and the pressure ring (12).

3. The electric hydraulic oil tank of a mini four-wheel drive loader according to claim 1, characterized in that: The refueling pipe (3) is provided with an external sealing ring (15) fixedly sleeved on the outer periphery of the externally threaded anti-overflow pipe (14); an externally threaded connecting sleeve (19) sleeved on the outer periphery of the externally threaded anti-overflow pipe (14) is fixedly provided on the left side of the external sealing ring (15); the externally threaded connecting sleeve (19) is threadedly connected to the first internally threaded connecting port (18).

4. The electric hydraulic oil tank for a mini four-wheel drive loader according to claim 3, characterized in that: A second sealing ring (17) sleeved on the outer periphery of the external threaded connection sleeve (19) is provided between the outer sealing ring (15) and the filling pipe (3).

5. The electric hydraulic oil tank for a mini four-wheel drive loader according to claim 1, characterized in that: The filter tube (6) is provided with an inner sealing ring (20) fixedly sleeved on the outer periphery of the externally threaded anti-overflow tube (14), and a third sealing ring (21) sleeved on the outer periphery of the externally threaded anti-overflow tube (14) is provided between the inner sealing ring (20) and the filter tube (6).

6. The electric hydraulic oil tank for a mini four-wheel drive loader according to claim 5, characterized in that: The inner diameter of the first internal thread connection port (18) is greater than the inner diameter of the second internal thread connection port (22), and the outer diameter of the inner sealing ring (20) is smaller than the inner diameter of the first internal thread connection port (18).

7. The electric hydraulic oil tank for a mini four-wheel drive loader according to claim 1, characterized in that: An oil dipstick (5) is installed on the outside of the oil tank body (1).

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