Leakage-proof oil tank

Abstract

The invention provides an anti-leakage oil tank which comprises an oil tank body, an oil tank cover and an oil tank cover. The cover body is detachably connected with the oil tank body at the top of the oil tank body so as to seal the cavity; the oil pump assembly is connected with the oil tank body at the bottom of the oil tank body, and the oil pump assembly is configured to pump oil in the cavity; the pressure balance assembly comprises a deformable part and a pipeline connected with the deformable part, and one end of the pipeline is communicated with an inner cavity of the deformable part; and the deformable part is configured to deform when the pressure in the cavity is increased / decreased, so that the pressure in the cavity is balanced. Compared with the prior art, the leakage-proof oil tank can balance the pressure in the oil tank by means of the pressure balance assembly under the temperature difference condition, and the oil leakage problem is solved.

Description

Technical Field

[0001] The invention relates to a leak-proof oil tank, belonging to the technical field of air pressure regulation. Background Art

[0002] Chain saws are a common garden tool, and they often leak oil during use. The biggest cause of oil leakage is temperature difference. For example, when a chain saw is moved from a cold environment to a warm environment, the oil will expand, greatly increasing the pressure inside the oil tank. At this time, even if the chain saw is not running, the oil will be pressurized through the oil pump assembly, resulting in leakage.

[0003] In view of this, it is indeed necessary to propose improvements to the existing fuel tank to solve the above-mentioned problems. Summary of the invention

[0004] The object of the present invention is to provide a leak-proof oil tank, which can balance the pressure in the oil tank by means of a pressure balancing component under temperature difference conditions, thereby solving the oil leakage problem.

[0005] To achieve the above object, the present invention provides a leak-proof oil tank, comprising:

[0006] The oil tank body has a cavity formed inside for containing oil;

[0007] a cover body, detachably connected to the oil tank body at the top of the oil tank body to close the cavity;

[0008] an oil pump assembly connected to the oil tank body at the bottom of the oil tank body, the oil pump assembly being configured to pump the oil in the cavity; and

[0009] A pressure balancing assembly, comprising a deformable member and a pipe connected to the deformable member, wherein one end of the pipe is in communication with an inner cavity of the deformable member;

[0010] Wherein, the deformable member is configured to deform when the pressure in the cavity increases / decreases to balance the pressure in the cavity.

[0011] Furthermore, the deformable member is arranged in the cavity, one end of the pipe is communicated with the inner cavity of the deformable member, and the other end of the pipe is communicated with the external air.

[0012] Furthermore, when the oil level in the oil tank body gradually rises, the pressure in the cavity gradually increases, the gas in the inner cavity of the deformable member is discharged into the external air through the pipe, and the volume of the deformable member gradually decreases.

[0013] Furthermore, when the oil level in the oil tank body gradually decreases, the pressure in the cavity gradually decreases, and external air enters the inner cavity of the deformable member through the pipe, and the volume of the deformable member gradually increases.

[0014] Furthermore, when the temperature inside the oil tank body increases, the pressure in the cavity gradually increases, the gas in the inner cavity of the deformable member is discharged into the external air through the pipe, and the volume of the deformable member gradually decreases.

[0015] Furthermore, when the temperature inside the oil tank body decreases, the pressure in the cavity gradually decreases, and external air enters the inner cavity of the deformable member through the pipe, and the volume of the deformable member gradually increases.

[0016] Furthermore, the deformable member is arranged outside the cavity, one end of the pipe is communicated with the inner cavity of the deformable member, and the other end of the pipe is communicated with the cavity.

[0017] Furthermore, when the pressure in the cavity gradually increases, the oil / gas in the cavity flows into the inner cavity of the deformable member through the pipeline to adjust the pressure in the cavity.

[0018] Furthermore, when the pressure in the cavity gradually decreases, the oil / gas in the inner cavity of the deformable member flows into the cavity through the pipeline, and the volume of the deformable member gradually decreases.

[0019] Furthermore, a mounting hole is opened on the side wall of the fuel tank body, one end of the pipe passes through the mounting hole and is sealed and connected to the fuel tank body, and the other end of the pipe extends into the cavity and extends toward the top of the fuel tank body, so that the deformable part is arranged close to the top of the fuel tank body.

[0020] Furthermore, the cavity of the oil tank body is configured to be variable in volume so that the pressure in the cavity is balanced with the external air pressure.

[0021] Furthermore, the oil pump assembly includes an oil pump and a delivery channel extending from the bottom of the oil tank body into the oil tank body, and the extending height of the delivery channel is lower than the height of the pipeline.

[0022] Furthermore, the delivery channel and the pipeline are arranged on the same side of the oil tank body.

[0023] The beneficial effect of the present invention is that the leak-proof oil tank of the present invention is provided with a pressure balancing assembly, which includes a deformable part and a pipe connected to the deformable part, one end of the pipe is connected to the inner cavity of the deformable part, so that when the pressure in the cavity increases / decreases, the deformable part can be used to deform to balance the pressure in the cavity, and oil leakage will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the leak-proof oil tank of the present invention.

[0025] Figure 2 yes Figure 1 Exploded view of the containment tank shown.

[0026] Figure 3 yes Figure 1 A cross-sectional view of the leak-proof oil tank shown.

[0027] Figure 4 yes Figure 2 A three-dimensional view of the fuel tank body.

[0028] Figure 5 yes Figure 4 Another angle schematic diagram of the fuel tank body is shown.

[0029] Figure 6 yes Figure 2 Stereoscopic view of the conveying channel in the middle.

[0030] Figure 7 yes Figure 2 A perspective view of the pressure balance assembly.

[0031] Figure 8 yes Figure 2 A three-dimensional view of the middle cover body.

[0032] Fig. 9 yes Figure 8 Another angle schematic diagram of the cover body shown.

[0033] Fig.10 It is a three-dimensional diagram of another embodiment of the leak-proof oil tank of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] like Figures 1 to 3 As shown, the present invention provides a leak-proof oil tank 100 that can be used for a chain saw, including an oil tank body 10, a cover body 20, an oil pump assembly 30 and a pressure balance assembly 40, wherein a cavity 11 for accommodating oil (not shown) is formed inside the oil tank body 10; the cover body 20 is detachably connected to the oil tank body 10 at the top of the oil tank body 10 to close the cavity 11; the oil pump assembly 30 is connected to the oil tank body 10 at the bottom of the oil tank body 10, and the oil pump assembly 30 is configured to pump the oil in the cavity 11; the pressure balance assembly 40 includes a deformable member 41 and a pipe 42 connected to the deformable member 41, one end of the pipe 42 is connected to the inner cavity of the deformable member 41, and the deformable member 41 is configured to deform when the pressure in the cavity 11 increases / decreases to balance the pressure in the cavity 11. In this embodiment, the deformable member 41 is disposed in the cavity 11 , one end of the pipe 42 is communicated with the inner cavity of the deformable member 41 , and the other end of the pipe 42 is communicated with the external air.

[0037] like Figures 2 to 5 As shown, the fuel tank body 10 is generally fan-shaped, and the bottom size is larger than the top size. The advantage of this design is that it makes the fuel tank body 10 more stable. Of course, the shape and size of the fuel tank body 10 can be designed according to actual conditions and are not limited here.

[0038] Combination Figure 6As shown, the oil pump assembly 30 includes an oil pump 31 and a delivery channel 32 extending from the bottom of the oil tank body 10 into the oil tank body 10, a first mounting hole 12 is opened at the bottom of the oil tank body 10, one end of the delivery channel 32 extends from the first mounting hole 12 into the oil tank body 10, and a sealing ring 33 is provided at one end of the delivery channel 32, and the sealing ring 33 is sealed and connected to the first mounting hole 12, so as to prevent the oil in the oil tank body 10 from leaking from the first mounting hole 12.

[0039] A limit block 13 is provided at the bottom of the oil tank body 10. The limit block 13 is annularly arranged and surrounds the first mounting hole 12 to form a limit cavity 14 outside the first mounting hole 12. A positioning block 34 is also provided at one end of the delivery channel 32. The positioning block 34 is flat and located below the sealing ring 33. On the one hand, it can limit the sealing ring 33, and on the other hand, it can cooperate with the limit block 13 to ensure that the oil pump assembly 30 is stably connected to the bottom of the oil tank body 10.

[0040] In this embodiment, the positioning block 34 is accommodated in the limiting cavity 14 to play a positioning role; of course, the positioning block 34 may not fill the limiting cavity 14, so as to reduce the weight of the leak-proof oil tank 100 and facilitate disassembly and maintenance. The height of the delivery channel 32 extending into the oil tank body 10 is lower than the height of the pipeline 42, and the delivery channel 32 and the pipeline 42 are arranged on the same side of the oil tank body 10. The advantage of this arrangement is that it makes the installation structure of the delivery channel 32 and the pipeline 42 in the oil tank body 10 more compact. Of course, in other embodiments, the height of the delivery channel 32 extending into the oil tank body 10 can also be adjusted according to actual conditions, and the setting positions of the delivery channel 32 and the pipeline 42 on the oil tank body 10 can also be adjusted according to actual conditions, which are not limited here.

[0041] A second mounting hole 15 is provided on the side wall of the fuel tank body 10, one end of the pipe 42 passes through the second mounting hole 15 and is sealed and connected to the fuel tank body 10, and the other end of the pipe 42 extends into the cavity 11 and toward the top of the fuel tank body 10, so that the deformable member 41 is arranged close to the top of the fuel tank body 10. In this embodiment, the pipe 42 is a nitrile hose, and the deformable member 41 is a hollow silicone rubber ball, so that the weight of the pressure balance assembly 40 is lighter and the hollow silicone rubber ball is easier to deform. Of course, in other embodiments, the pipe 42 can also be made of other materials, and the deformable member 41 can also be made of other materials and other shapes, which are not limited here.

[0042] The second mounting hole 15 is a circular hole. A first protrusion 161 and a second protrusion 162 are protrudingly provided on the side wall of the fuel tank body 10. The cross sections of the first protrusion 161 and the second protrusion 162 are both circular. The first protrusion 161 is connected to the outer periphery of the second protrusion 162, and the protrusion depth of the first protrusion 161 is greater than the protrusion depth of the second protrusion 162, so as to form a step portion 163 between the first protrusion 161 and the second protrusion 162. The second mounting hole 15 is set through the second protrusion 162.

[0043] Combination Figure 7 As shown, two gaskets 43 are provided at one end of the pipe 42 passing through the second mounting hole 15, wherein one gasket 43 is located inside the tank body 10, and the other gasket 43 is accommodated in the step portion 163. In this way, the second mounting hole 15 can be sealed by the mutual cooperation of the two gaskets 43 to prevent the oil in the tank body 10 from leaking from the second mounting hole 15.

[0044] like Figure 5 As shown, the first protrusion 161 and the second protrusion 162 are both arranged in an inclined shape, that is, in the height direction of the tank body 10, the protrusion depth of the first protrusion 161 and the second protrusion 162 arranged on the right side is smaller than the protrusion depth of the first protrusion 161 and the second protrusion 162 arranged on the left side, so that the pipeline 42 fits the tank body 10 more closely and improves the sealing performance.

[0045] As another variation of this embodiment, the cavity 11 of the fuel tank body 10 is configured to be variable in volume so that the pressure in the cavity 11 is balanced with the external air pressure. In other words, the fuel tank body 10 itself can also be deformed to better adjust the pressure in the cavity 11.

[0046] Of course, one of the surfaces of the oil tank body 10 can also be configured as a flexible film, so that when subjected to pressure, the pressure in the cavity 11 can be balanced with the external air pressure through the deformation of the flexible film.

[0047] like Figure 5 , Figure 8 and Fig. 9 As shown, a mounting hole 17 is provided at the top of the fuel tank body 10, and the cover body 20 is threadedly connected to the fuel tank body 10 through the mounting hole 17. A refueling port 21 and a refueling pipe 22 extending downward from the refueling port 21 are provided on the cover body 20, and the refueling port 21 is communicated with the refueling pipe 22, so that oil can be transported to the cavity 11 of the fuel tank body 10 through the refueling port 21 and the refueling pipe 22.

[0048] When the leak-proof oil tank 100 of the present invention is used, as the oil level in the oil tank body 10 gradually rises, the pressure in the cavity 11 gradually increases, and the gas in the inner cavity of the deformable member 41 is discharged to the outside air through the pipe 42. At this time, the volume of the deformable member 41 gradually decreases, achieving pressure balance in the oil tank body 10. Preferably, the pressure in the oil tank body 10 of the present invention can be maintained at 0-0.2 bar, but the specific value depends on the type and parameters of the oil pump 31 itself.

[0049] When the oil level in the tank body 10 gradually decreases, the pressure in the cavity 11 gradually decreases. At this time, external air can enter the inner cavity of the deformable part 41 through the pipe 42, causing the volume of the deformable part 41 to gradually increase, thereby achieving pressure balance in the tank body 10.

[0050] Of course, when the oil level in the oil tank body 10 does not change, when the temperature in the oil tank body 10 rises, the pressure in the cavity 11 gradually increases, and the gas in the inner cavity of the deformable member 41 is discharged to the outside air through the pipe 42. At this time, the volume of the deformable member 41 gradually decreases, and the pressure balance in the oil tank body 10 is achieved. In other words, when the oil tank body 10 is moved from a low temperature environment to a high temperature environment for use, the oil in the oil tank body 10 will expand, so that the internal pressure of the oil tank body 10 increases; and the pressure inside the oil tank body 10 will compress the deformable member 41, reduce the volume of the deformable member 41, thereby reducing the pressure inside the oil tank body 10 and effectively preventing oil leakage.

[0051] When the temperature inside the oil tank body 10 decreases, the pressure in the cavity 11 gradually decreases, and at this time, the external air can enter the inner cavity of the deformable member 41 through the pipe 42, so that the volume of the deformable member 41 gradually increases, and the pressure balance inside the oil tank body 10 is achieved. In other words, when the oil tank body 10 is moved from a high temperature environment to a low temperature environment for use, the internal pressure of the oil tank body 10 decreases; and under the action of the external atmospheric pressure, the deformable member 41 will expand, so that the volume of the deformable member 41 increases, balancing the pressure inside the oil tank body 10, and effectively preventing oil leakage.

[0052] like Fig.10As shown, in another embodiment of the present invention, the deformable member 41' is disposed outside the cavity 11, and at this time, one end of the pipe 42' is communicated with the inner cavity of the deformable member 41', and the other end is communicated with the cavity 11. In this way, when the pressure in the cavity 11 gradually increases, the oil / gas in the cavity 11 can flow into the inner cavity of the deformable member 41' through the pipe 42', so as to increase the volume of the oil tank body 10 while adjusting the pressure in the cavity 11, thereby achieving pressure balance in the oil tank body 10. For example: when the oil level in the tank body 10 is higher than the end of the pipe 42' connected to the cavity 11, the oil in the tank body 10 is pressed into the deformable part 41', or the oil and gas are pressed into the deformable part 41' together; when the oil level in the tank body 10 is lower than the end of the pipe 42' connected to the cavity 11, the gas in the tank body 10 is pressed into the deformable part 41', or the oil and gas are pressed into the deformable part 41' together.

[0053] When the pressure in the cavity 11 gradually decreases, the oil / gas in the inner cavity of the deformable member 41' can flow into the cavity 11 through the pipe 42', so that the volume of the deformable member 41' gradually decreases, and the pressure balance in the oil tank body 10 is achieved. For example: when the oil level in the deformable member 41' is higher than the end of the pipe 42' connected to the deformable member 41', the oil in the deformable member 41' is pressed into the cavity 11, or the oil and gas are pressed into the cavity 11 together; when the oil level in the deformable member 41' is lower than the end of the pipe 42' connected to the deformable member 41', the gas in the deformable member 41' is pressed into the cavity 11, or the oil and gas are pressed into the cavity 11 together.

[0054] Of course, a one-way valve may also be installed at the position where the pipeline 42' is connected to the cavity 11, and the one-way valve only allows gas to pass through but does not allow oil to pass through, so that only gas can circulate back and forth.

[0055] In summary, the anti-leakage oil tank 100 of the present invention is provided with a pressure balancing assembly 40, which includes deformable parts 41, 41' and pipes 42, 42' connected to the deformable parts 41, 41', one end of the pipes 42, 42' is connected to the inner cavity of the deformable parts 41, 41', so that when the pressure in the cavity 11 increases / decreases, the deformable parts 41, 41' can be used to deform to balance the pressure in the cavity 11, and oil leakage will not occur.

[0056] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A leak-proof oil tank, characterized in that: include: The oil tank body has a cavity formed inside for containing oil; a cover body, detachably connected to the oil tank body at the top of the oil tank body to close the cavity; an oil pump assembly connected to the oil tank body at the bottom of the oil tank body, the oil pump assembly being configured to pump the oil in the cavity; as well as A pressure balancing assembly, comprising a deformable member and a pipe connected to the deformable member, wherein one end of the pipe is in communication with an inner cavity of the deformable member; Wherein, the deformable member is configured to deform when the pressure in the cavity increases / decreases to balance the pressure in the cavity.

2. The leak-proof oil tank according to claim 1, characterized in that: The deformable member is arranged in the cavity, one end of the pipe is communicated with the inner cavity of the deformable member, and the other end of the pipe is communicated with the external air.

3. The leak-proof oil tank according to claim 2, characterized in that: When the oil level in the oil tank body gradually rises, the pressure in the cavity gradually increases, the gas in the inner cavity of the deformable member is discharged into the external air through the pipeline, and the volume of the deformable member gradually decreases.

4. The anti-leakage oil tank according to claim 2, characterized in that: When the oil level in the oil tank body gradually decreases, the pressure in the cavity gradually decreases, and external air enters the inner cavity of the deformable member through the pipeline, and the volume of the deformable member gradually increases.

5. The leak-proof oil tank according to claim 2, characterized in that: When the temperature inside the oil tank body increases, the pressure in the cavity gradually increases, the gas in the inner cavity of the deformable member is discharged into the external air through the pipeline, and the volume of the deformable member gradually decreases.

6. The leak-proof oil tank according to claim 2, characterized in that: When the temperature inside the oil tank body decreases, the pressure in the cavity gradually decreases, and external air enters the inner cavity of the deformable member through the pipe, and the volume of the deformable member gradually increases.

7. The leak-proof oil tank according to claim 1, characterized in that: The deformable member is arranged outside the cavity, one end of the pipeline is communicated with the inner cavity of the deformable member, and the other end of the pipeline is communicated with the cavity.

8. The leak-proof oil tank according to claim 7, characterized in that: When the pressure in the cavity gradually increases, the oil / gas in the cavity flows into the inner cavity of the deformable member through the pipeline to adjust the pressure in the cavity.

9. The leak-proof oil tank according to claim 7, characterized in that: When the pressure in the cavity gradually decreases, the oil / gas in the inner cavity of the deformable member flows into the cavity through the pipeline, and the volume of the deformable member gradually decreases.

10. The leak-proof oil tank according to claim 2, characterized in that: A mounting hole is provided on the side wall of the tank body, one end of the pipe passes through the mounting hole and is sealedly connected to the tank body, and the other end of the pipe extends into the cavity and toward the top of the tank body, so that the deformable part is arranged close to the top of the tank body.

11. The leak-proof oil tank according to claim 1, characterized in that: The cavity of the oil tank body is configured to be variable in volume so that the pressure in the cavity is balanced with the external air pressure.

12. The leak-proof oil tank according to claim 1, characterized in that: The oil pump assembly comprises an oil pump and a delivery channel extending from the bottom of the oil tank body into the oil tank body, and the extending height of the delivery channel is lower than the height of the pipeline.

13. The anti-leakage oil tank according to claim 12, characterized in that: The delivery channel and the pipeline are arranged on the same side of the oil tank body.

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