A sealing device and a chainsaw for sealing the opening of a refillable fuel tank

Abstract

The present invention provides a sealing device and a chainsaw for sealing the opening of a refillable fuel tank, and particularly relates to the technical field of cutting tools. The sealing device includes a main body and a pipeline. The main body is used to seal the opening of the fuel tank, at least part of the pipeline is located inside the main body, and the pipeline connects the inside and the outside of the fuel tank. When the main body is removed from the opening, the pipeline can be taken out from the fuel tank. The present invention can effectively reduce the structural space inside the chainsaw caused by the pipeline layout, improve the space utilization rate, and at the same time facilitate maintenance and troubleshooting.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting tools, and particularly to a sealing device and a chainsaw for sealing the opening of a refillable fuel tank. Background Art

[0002] A chainsaw is a tool that generates motion by driving the cutting teeth on a saw chain to cut trees, stones, etc. Generally, an oil tank is provided inside the chainsaw to replenish the lubricating oil stored in the oil tank to lubricate the saw chain. Most of the existing oil supply pipelines are arranged inside the chainsaw, which leads to an increase in the internal space of the chainsaw and an increase in the overall volume of the chainsaw. At the same time, when the sealing device on the oil tank fails, it is not convenient to repair it. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a sealing device and a chainsaw for sealing the opening of a refillable fuel tank, so as to improve the problem that it is not convenient to repair the sealing device when it fails and the internal space of the chainsaw is relatively large.

[0004] To achieve the above object and other related objects, the present invention provides a sealing device for sealing the opening of a refillable fuel tank, including:

[0005] A main body for sealing the opening of the fuel tank;

[0006] A pipeline, at least a part of the pipeline is located inside the main body, and the pipeline connects the inside of the fuel tank and the outside of the fuel tank.

[0007] When the main body is removed from the opening, the pipeline can be taken out of the fuel tank.

[0008] In an embodiment of the present invention, the pipeline includes: a first pipeline located inside the fuel tank and connected to the main body; and a second pipeline located outside the fuel tank and connected to the main body.

[0009] In an embodiment of the present invention, a filtering device is provided at one end of the first pipeline located inside the fuel tank.

[0010] In an embodiment of the present invention, one end of the second pipeline located outside the fuel tank is connected to an oil pump.

[0011] In an embodiment of the present invention, after the oil pump is driven, it can discharge the oil in the fuel tank.

[0012] In an embodiment of the present invention, a third pipeline is connected to the oil pump.

[0013] In an embodiment of the present invention, the first pipeline intersects with the second pipeline at the main body, and the angle therebetween is in the range of 45 to 135°.

[0014] In an embodiment of the present invention, a one-way valve is further provided on the fuel tank or the main body.

[0015] The present invention further provides a chainsaw, comprising: a main body housing; a guide plate mounted on the main body housing, a saw chain is circumferentially arranged on the guide plate, and the saw chain is driven by a prime mover to rotate circumferentially around the guide plate; and a fuel tank provided on the main body housing, the fuel tank is provided with a sealing device, the sealing device includes a main body and a pipeline, wherein at least part of the pipeline is located inside the main body, and the pipeline connects the inside and the outside of the fuel tank.

[0016] In an embodiment of the present invention, the pipeline includes a first pipeline and a second pipeline. The first pipeline is located inside the fuel tank and is connected to the main body. The second pipeline is located outside the fuel tank and is connected to the main body. One end of the second pipeline outside the fuel tank is connected to an oil pump, and the oil pump is driven by an oil pump driver.

[0017] In an embodiment of the present invention, the chainsaw further includes a limit pin, the limit pin is arranged inside the main body housing, and the limit pin passes through an opening formed on the guide plate.

[0018] In an embodiment of the present invention, the chainsaw further includes a tensioner, the tensioner is arranged inside the main body housing, the tensioner is located on one side of the limit pin, and the tensioner is connected to the saw chain.

[0019] In an embodiment of the present invention, the chainsaw further includes a sprocket, the sprocket is arranged inside the main body housing, the sprocket is located on the other side of the limit pin, and the sprocket is connected to the saw chain.

[0020] In an embodiment of the present invention, a third pipeline is further included, and the third pipeline communicates between an oil groove hole of the guide plate and an oil outlet of the oil pump.

[0021] In summary, through a sealing device and a chainsaw for sealing an opening of a refillable fuel tank disclosed by the present invention, the structural space inside the main body housing caused by the pipeline layout can be reduced. At the same time, the oil inlet pipeline of the oil pump passes through or is integrated on the main body, which can improve the space utilization rate. The filtering device is connected to one end of the oil inlet pipeline and can be taken out when the main body is opened, which is convenient for maintenance and troubleshooting. Description of the Drawings

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a chain saw in the present invention.

[0024] Figure 2 For Figure 1 the internal structural schematic diagram.

[0025] Figure 3 It is a schematic structural diagram of a sealing device for sealing the opening of a refillable fuel tank in the present invention.

[0026] Figure 4 It is a partial structural schematic diagram of a sealing device for sealing the opening of a refillable fuel tank in the present invention.

[0027] Element number description

[0028] 1. Saw chain; 2. Guide plate; 3. Main body housing; 4. Fuel tank; 5. Oil groove hole; 6. Third pipeline; 7. Oil pump; 8. Oil pump driver; 9. First pipeline; 10. Second pipeline; 11. Filter device; 12. Check valve; 13. Main body; 14. Bolt; 15. Limit pin; 16. Sprocket; 17. Tensioner; 18. Driving pin; 19. Protective cover; 20. Nut; 21. Tensioning hole. Specific embodiments

[0029] The following illustrates the embodiments of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present invention are for the purpose of describing specific specific implementation schemes, rather than for limiting the protection scope of the present invention. The test methods without specific conditions noted in the following embodiments are usually carried out under conventional conditions or according to the conditions recommended by each manufacturer.

[0030] Please refer to Figures 1 to 4. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0031] See also Figure 1 and Figure 2 As shown, the present invention provides a chain saw, which can be used to cut trees, concrete, stone, etc. The chain saw may include a saw chain 1, a guide plate 2, a main body shell 3, an oil tank 4, an oil pump 7, a bolt 14, a limit pin 15, a sprocket 16, a tensioner 17, a drive pin 18, a protective cover 19, a nut 20 and a sealing device. The saw chain 1 may be provided with cutting teeth. When the saw chain 1 is driven by the prime mover to move, it can drive the cutting teeth to move, and the trees, concrete, stone, etc. can be cut by the cutting teeth. The saw chain 1 can be arranged in the guide groove of the guide plate 2. The guide plate 2 may be provided with an oil groove hole 5, and the oil groove hole 5 can be connected with the guide groove of the guide plate 2. When the chain saw is working, the oil pump 7 can pump the lubricating oil stored in the oil tank 4 into the oil groove hole 5, and then flow into the guide groove through the oil groove hole 5 to lubricate the saw chain 1. The specific position of the oil groove hole 5 is not limited. For example, in this embodiment, the oil groove hole 5 can be located at one end of the guide plate 2 close to the main shell 3. Of course, in other embodiments, the oil groove hole 5 can also be located at other positions of the guide plate 2. The specific position of the oil groove hole 5 can be set according to actual needs, as long as it can meet the requirements of delivering the lubricating oil to the guide groove. The oil tank 4 can be installed on one side of the main shell 3, and the connection method between the two is not limited. For example, the oil tank 4 can be fixed on the main shell 3 by screws, etc., the oil tank 4 can also be fixed on the main shell 3 by welding, etc., and the oil tank 4 can also be integrally formed on the main shell 3, as long as it can meet the requirements of installing the oil tank 4 on the main shell 3.

[0032] See also Figure 2As shown, in an embodiment of the present invention, in order to facilitate the limitation of the guide plate 2 on the main body housing 3, bolts 14 and limit pins 15 may be provided on the main body housing 3, and openings or holes adapted to the bolts 14 and limit pins 15 may be provided on the guide plate 2. For example, in this embodiment, a waist-shaped hole may be provided on the guide plate 2, and the guide plate 2 can be limited on the main body housing 3 by the cooperation of the waist-shaped hole with the bolts 14 and limit pins 15. In other embodiments, two holes may also be provided on the guide plate 2, and the guide plate 2 can be limited on the main body housing 3 by the cooperation of the two holes with the bolts 14 and limit pins 15 respectively. The number and distribution positions of the bolts 14 and limit pins 15 are not limited. For example, in this embodiment, the number of the bolts 14 and limit pins 15 is one. In other embodiments, the number of the bolts 14 can be two, three, four, etc., and the number of the limit pins 15 can also be two, three, four, etc. The bolts 14 and limit pins 15 can be distributed in a straight line, in a rectangle, or in a ring. Of course, the bolts 14 and limit pins 15 can be cross-distributed or parallel-distributed. Alternatively, only the bolts 14 or the limit pins 15 can be provided. When only the bolts 14 are provided, the number of the bolts 14 is at least two. When only the limit pins 15 are provided, the number of the limit pins 15 is at least two. The specific number and specific distribution positions of the bolts 14 and limit pins 15 are not limited, as long as the guide plate 2 can be fixed on the main body housing 3 by the bolts 14 and limit pins 15.

[0033] Please refer to Figure 1 and Figure 2 As shown, in an embodiment of the present invention, in order to further fix the guide plate 2 on the main body housing 3, a protective cover 19 may also be provided on the main body housing 3. The protective cover 19 can be fixed on the main body housing 3 by a nut 20. The nut 20 is adapted to the bolt 14, and the fixation of the protective cover 19 can be achieved through the cooperation of the nut 20 and the bolt 14. The guide plate 2 can be pressed by the protective cover 19 to further limit the guide plate 2. Of course, the protective cover 19 can also protect internal components such as the tensioner 17 and the sprocket 16, preventing the internal components of the chain saw from being directly exposed to the outside and causing potential safety hazards.

[0034] Please refer to Figure 2As shown, in an embodiment of the present invention, in order to facilitate driving the transmission of the saw chain 1, a sprocket 16 is rotatably provided on the main body housing 3, and the sprocket 16 can be engaged with the saw chain 1. In order to drive the sprocket 16 to rotate, a driving member such as a prime mover is also provided on the main body housing 3, and the rotating end of the driving member can be drivingly connected to the sprocket 16 to drive the sprocket 16 to rotate. For example, the rotating end of the driving member can be connected to the sprocket 16 by a belt, and the sprocket 16 can be driven to rotate by the belt. Another example is that a gear can be provided on the driving end of the driving member, and a gear can also be provided on the sprocket 16, and the two gears mesh with each other to drive the sprocket 16 to rotate. Another example is that the transmission between the transmission end of the driving member and the sprocket 16 can also be carried out by means of a worm and worm gear transmission. The specific transmission method between the driving member and the sprocket 16 is not limited, as long as it can satisfy driving the sprocket 16 to rotate.

[0035] Please refer to Figure 2 As shown, in an embodiment of the present invention, in order to tension the saw chain 1, a tensioner 17 is also provided on the main body housing 3. The tensioner 17 can be connected to the saw chain 1, and a driving pin 18 is provided on the tensioner 17. The driving pin 18 can be used to adjust the tension degree of the saw chain 1. In order to facilitate the staff to adjust the driving pin 18 to adjust the tension degree of the saw chain 1, a tensioning hole 21 is also provided on the protective cover 19. One end of the driving pin 18 can pass through the tensioning hole 21 to facilitate the staff to adjust. The specific structure and installation position of the tensioner 17 are not limited, as long as it can realize tensioning the saw chain 1.

[0036] Please refer to Figure 3 As shown, in an embodiment of the present invention, the oil pump 7 can be installed on the main body housing 3. The oil pump 7 can be connected to the oil pump driver 8, and the oil pump 7 can be driven to work by the oil pump driver 8. In order to timely replenish lubricating oil to the saw chain 1, when the saw chain 1 is driving and working, the oil pump driver 8 synchronously drives the oil pump 7 to discharge lubricating oil from the fuel tank 4 through the sealing device to replenish the saw chain 1 in real time. The specific transmission method between the oil pump 7 and the oil pump driver 8 is not limited. For example, in this embodiment, the oil pump driver 8 can be connected to the prime mover, and the prime mover can drive the oil pump driver 8 to work. The oil pump driver 8 can be connected to the oil pump 7. Specifically, the rotating shaft of the oil pump driver 8 and the rotating shaft of the oil pump 7 can be connected by a belt, or a gear is provided on the rotating shaft of the oil pump driver 8, and a gear is also provided on the rotating shaft of the oil pump 7, and the two gears mesh with each other to realize the oil pump driver 8 driving the oil pump 7 to work, or the rotating shaft of the oil pump driver 8 and the transmission shaft of the oil pump 7 can be connected by means of a worm and worm gear transmission. Of course, in other embodiments, the oil pump driver 8 can also not be provided, and the oil pump 7 can be directly driven by a power source to work to realize the pumping and suction of lubricating oil.

[0037] Please refer to Figure 3As shown, the present invention also provides a sealing device for sealing the opening of a refillable oil tank, which can be applied to a chain saw, and the sealing device may include a pipeline and a main body 13. The pipeline may pass through the main body 13, and the main body 13 may be arranged at the opening of the oil tank 4. Among them, the pipeline may be integrated into the main body 13 in an integral manner, the pipeline may also pass through and be arranged on the main body 13, and the pipeline may also be slidably arranged on the main body 13. The pipeline may include a first pipeline 9 and a second pipeline 10. Among them, the first pipeline 9 may be located inside the oil tank 4, and one end thereof may be arranged on the main body 13. The main body 13 may be a tank cap, or a sealing cap, etc., as long as the oil tank 4 can be sealed through the main body 13. At the same time, the first pipeline 9 can be connected to the second pipeline 10, and the connection between the two can intersect on the main body 13, and a certain angle is formed between the two. The specific range of the angle is not limited. For example, in this embodiment, the range of the angle can be 45° to 135°, and in other embodiments, the range of the angle can also be 30° to 150°. The specific size of the angle can be set according to actual needs. One end of the second pipeline 10 can be connected to the oil inlet of the oil pump 7 to achieve the pumping of the lubricating oil stored in the oil tank 4. The pipeline is designed to pass through or be integrated on the main body 13 and be externally connected to the oil tank 4, which can reduce the setting of the internal oil circuit structure of the saw chain 1 and achieve the release of the internal space of the saw chain 1. The main body 13 can be movably sealed at the opening of the oil tank 4, and the lubricating oil can be added to the oil tank 4 by opening the main body 13, so that the oil tank 4 always maintains sufficient lubricating oil. At the same time, when the main body 13 is removed from the opening of the oil tank 4, the pipeline can be driven to be removed from the oil tank 4. The pipeline can be a hose, and its material can be rubber or plastic, etc., and the pipeline can also be a metal pipeline. The oil outlet of the oil pump 7 is also provided with a third pipeline 6, and the third pipeline 6 can be installed in the main body shell 3. One end of the third pipeline 6 can be connected to the oil groove hole 5 on the guide plate 2, and the other end of the third pipeline 6 can be connected to the oil outlet of the oil pump 7, and the guide groove on the guide plate 2 can be connected to the oil groove hole 5. The oil pump 7 can pump the lubricating oil stored in the oil tank 4 into the third pipeline 6, and the lubricating oil flows into the guide groove of the guide plate 2 through the oil groove hole 5. When the saw chain 1 moves, the lubricating oil can be applied between the saw chain 1 and the guide groove to achieve the lubrication effect of the saw chain 1. In this embodiment, the third pipeline 6 can be a hose, and its material can be rubber or plastic, etc., and in other embodiments, the third pipeline 6 can also be a metal pipeline. The specific material of the third pipeline 6 is not limited, as long as it can meet the requirements of conveying the lubricating oil to the oil groove hole 5.

[0038] See also Figure 3As shown, in an embodiment of the present invention, in order to prevent impurities mixed in the lubricating oil in the fuel tank 4 from being pumped into the oil trough hole 5 by the oil pump 7, which may cause the impurities to be pumped between the guide groove and the saw chain 1 and damage the structure of the saw chain 1 when the saw chain 1 is driven, a filtering device 11 may be installed at one end of the first pipeline 9 located in the fuel tank 4 to filter the pumped lubricating oil and retain the impurities in the fuel tank 4. In this embodiment, the filtering device 11 may include multiple layers of filter meshes to filter the lubricating oil through the multiple layers of filter meshes. In other embodiments, the filtering device 11 may also include multiple layers of sponges to filter the lubricating oil through the sponges. The specific structure of the filtering device 11 is not limited as long as it can filter the lubricating oil and remove the impurities. The filtering device 11 can be taken out when the main body 13 is opened, which can achieve the effect of resource utilization and has the advantages of small volume, simple installation, low cost, convenient troubleshooting and maintenance, etc.

[0039] Please refer to Figure 3 and Figure 4 As described above, in an embodiment of the present invention, since the oil pump 7 will suck the lubricating oil stored in the fuel tank 4 during operation, and since the fuel tank 4 is a sealed structure, the pressure inside the fuel tank 4 will gradually decrease, which will affect the subsequent pumping effect to a certain extent. In order to keep the pressure inside the fuel tank 4 stable, a check valve 12 may be provided on the fuel tank 4 and / or on the main body 13, and the stability of the pressure inside the fuel tank 4 can be achieved through the check valve 12. The specific installation form and installation position of the check valve 12 are not limited as long as the pressure inside the fuel tank 4 can be kept stable. For example, the check valve 12 may be installed on one side close to the oil trough hole 5. When there is a leak at the connection between the third pipeline 6 and the oil trough hole 5, the check valve 12 can suck the leaked lubricating oil back into the fuel tank 4 to achieve the recycling of the leaked lubricating oil.

[0040] In summary, through a sealing device and a chain saw for sealing the opening of a refillable fuel tank, the present invention can reduce the structural space inside the main body shell caused by the pipeline layout. At the same time, the oil inlet pipeline of the oil pump passes through or is integrated into the main body, which can improve the space utilization rate. The filtering device is connected to one end of the oil inlet pipeline and can be taken out when the main body is opened, which is convenient for maintenance and troubleshooting. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and practical significance.

[0041] In the description of this specification, the descriptions referring to terms such as "this embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0042] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A chain saw, characterized in that, Comprising: A main body housing; A guide plate, mounted on the main body housing, a saw chain being circumferentially provided on the guide plate, the saw chain being driven by a prime mover to rotate circumferentially around the guide plate; and A fuel tank, provided on the main body housing, the fuel tank being provided with a sealing device, the sealing device comprising a main body and a pipeline, wherein at least part of the pipeline is located within the main body, the pipeline connecting the interior of the fuel tank to the exterior of the fuel tank; The pipeline comprises: A first pipeline, located within the fuel tank and connected to the main body; A second pipeline, located outside the fuel tank and connected to the main body; the first pipeline communicates with the second pipeline at the main body; the first pipeline and the second pipeline pass through or are integrated on the main body; the second pipeline communicates with the inlet of an oil pump.

2. The chain saw according to claim 1, characterized in that, The oil pump is driven by an oil pump driver.

3. The chain saw according to claim 2, characterized in that, It further comprises a limit pin, the limit pin being provided within the main body housing, the limit pin passing through an opening formed in the guide plate.

4. The chainsaw according to claim 3, characterized in that, It further comprises a tensioner, the tensioner being provided within the main body housing, the tensioner being located on one side of the limit pin, the tensioner being connected to the saw chain.

5. The chain saw according to claim 4, characterized in that, It further comprises a sprocket, the sprocket being provided within the main body housing, the sprocket being located on the other side of the limit pin, the sprocket being connected to the saw chain.

6. The chain saw according to claim 2, wherein It further comprises a third pipeline, the third pipeline being connected between an oil groove hole of the guide plate and the outlet of the oil pump.

7. The chain saw according to claim 1, characterized in that, One end of the first pipeline located within the fuel tank is provided with a filtering device.

8. The chain saw according to claim 1, characterized in that, After being driven, the oil pump can discharge the oil within the fuel tank.

9. The chain saw according to claim 1, characterized in that, The angle at which the first pipeline intersects the second pipeline at the main body ranges from 45 to 135°.

10. The chain saw according to claim 1, characterized in that, A check valve is further provided on the fuel tank or the main body.

Images