External engine fine filtering device of motorcycle

Abstract

The invention discloses an external engine fine filtration device of a motorcycle, and aims to provide the external engine fine filtration device of the motorcycle, which enables an operator to conveniently and quickly disassemble, assemble and replace a fine filter on a crankcase of the motorcycle engine so as to facilitate the maintenance work of the motorcycle engine. One end of the fine filter is provided with an oil outlet hole and a threaded inlet, and the fine filter is externally arranged below an oil pan at the bottom of a crankcase; the bottom face of the oil pan is provided with a threaded connector, one end of the threaded pipe connector is in sealed connection with the threaded connector, and the other end of the threaded pipe connector is in sealed connection with a threaded inlet of the fine filter. The oil inlet channel is communicated with the oil cavity of the crankcase and the oil inlet channel of the threaded connector; and the oil return channel is communicated with the oil outlet hole and the oil cavity of the crankcase.

Description

Technical Field

[0001] The invention relates to the technical field of engine oil fine filters, and in particular to a fine filter structure for a motorcycle engine. Background Art

[0002] The crankcase of a motorcycle engine generally needs to be equipped with a fine filter, which filters the oil in the crankcase. It is an important component to ensure the cleanliness of the oil and needs to be replaced regularly. At present, the fine filter on the crankcase of a motorcycle engine is usually built-in and arranged on the front side of the crankcase body, while the front, rear and left and right sides of the crankcase of a motorcycle are generally arranged with other parts of the motorcycle. The structural space on the front, rear and left and right sides of the crankcase is relatively compact, which makes the disassembly, assembly and replacement of the fine filter inconvenient and inefficient, which is not conducive to the maintenance of the motorcycle engine. Summary of the invention

[0003] The purpose of the present invention is to provide a motorcycle external engine fine filter device which enables operators to conveniently and quickly disassemble, assemble and replace the fine filter on the crankcase of a motorcycle engine, so as to facilitate the maintenance of the motorcycle engine.

[0004] The technical solution of the present invention is: A motorcycle external engine fine filter device, comprising: A fine filter, one end of which is provided with an oil outlet hole and a threaded inlet, and the fine filter is externally placed below the oil pan at the bottom of the crankcase; A threaded pipe joint, a threaded interface is provided on the bottom surface of the oil pan, one end of the threaded pipe joint is sealedly connected to the threaded interface, and the other end of the threaded pipe joint is sealedly connected to the threaded inlet of the fine filter; An oil inlet passage connecting the oil chamber of the crankcase and the oil inlet passage of the threaded interface; The oil return channel connects the oil outlet hole and the oil chamber of the crankcase. The oil in the oil chamber of the crankcase enters the fine filter through the oil inlet channel, and is filtered by the fine filter. The filtered oil flows back to the oil chamber of the crankcase through the oil outlet hole and the oil return channel, forming an oil filtration cycle. Since other parts of the motorcycle are generally arranged on the front, rear and left and right sides of the crankcase of a motorcycle, the structural space on the front, rear and left and right sides of the crankcase is relatively compact; but there are no parts below the crankcase, so the fine filter of this scheme is installed in the threaded interface on the bottom surface of the oil pan at the bottom of the crankcase of the motorcycle engine through a threaded pipe joint, so that the fine filter is installed in an empty position below the crankcase (the fine filter is externally arranged below the oil pan), so that on the one hand, the fine filter can be directly disassembled and replaced from the bottom of the crankcase, and the disassembly and replacement of the fine filter is not affected by other parts of the motorcycle (no other parts of the motorcycle need to be disassembled during the replacement of the fine filter), and the disassembly can be completed by directly unscrewing the fine filter, and the installation can be completed by directly screwing on the fine filter, so the fine filter is easy to disassemble and replace, which can effectively improve the efficiency of disassembly and replacement of the fine filter, which is beneficial to the maintenance of the motorcycle engine; on the other hand, the fine filter is installed in the empty position below the crankcase, so that more space can be provided on the front or rear side of the crankcase to install other parts of the motorcycle, which is beneficial to the arrangement of other parts of the motorcycle.

[0005] Preferably, a fine filter sealing ring is provided at one end of the fine filter, the threaded inlet is located inside the fine filter sealing ring, the oil outlet is located between the threaded inlet and the fine filter sealing ring, and the fine filter sealing ring forms a sealed connection between the fine filter and the oil pan.

[0006] As a preference, it also includes: The bottom shell sealing ring is provided with a sealing ring installation groove on the bottom surface of the oil sump, the bottom shell sealing ring is embedded in the sealing ring installation groove, the bottom shell sealing ring surrounds the outside of the fine filter sealing ring, and the bottom shell sealing ring forms another sealing connection between the fine filter and the oil sump; An annular detection groove is arranged on the bottom surface of the oil pan and is located between the fine filter sealing ring and the pan sealing ring; The monitoring sensor is arranged on the oil pan, and the monitoring sensor detects the oil in the annular detection groove in real time. In this way, an inner and outer sealing connection structure can be formed between the fine filter and the oil pan through the fine filter sealing ring and the pan sealing ring, thereby further effectively improving the sealing between the fine filter and the oil pan, and effectively avoiding the problem of oil leakage between the fine filter and the oil pan. On the other hand, due to the long-term use of the motorcycle, the threads may become loose due to vibration (for example, the threaded interface between the threaded pipe joint and the oil pan becomes loose, or the threaded pipe joint and the threaded inlet of the fine filter become loose), resulting in oil leakage between the fine filter and the oil pan. In order to solve this problem, the present invention provides an annular detection groove on the bottom surface of the oil pan between the fine filter sealing ring and the bottom shell sealing ring, and detects the engine oil in the annular detection groove in real time through a monitoring sensor. When the seal formed by the fine filter sealing ring between the fine filter and the oil pan leaks oil, the engine oil will enter between the fine filter sealing ring and the bottom shell sealing ring and accumulate in the annular detection groove. When the monitoring sensor detects the accumulation of engine oil in the annular detection groove, an alarm can be issued to remind the user to promptly inspect and repair the fine filter.

[0007] Preferably, the oil return channel includes a bottom shell channel and a case channel, wherein the bottom shell channel is arranged in the shell wall of the oil pan, the case channel is arranged in the case wall of the crankcase, one end of the bottom shell channel is connected to the oil outlet, the other end of the bottom shell channel is connected to one end of the case channel, and the other end of the case channel is connected to the oil chamber of the crankcase. In this way, the oil return channel can be directly built into the shell wall of the oil pan and the case wall of the crankcase without the need to arrange external pipelines, which can reduce parts and save the installation steps of corresponding external pipelines, which is conducive to reducing production costs and improving production efficiency.

[0008] Preferably, the oil return channel also includes an annular oil groove, which is arranged on the bottom surface of the oil pan, and is located between the fine filter seal ring and the threaded interface, the oil outlet is connected to the notch of the annular oil groove, and one end of the pan channel is connected to the annular oil groove. In this way, the oil outlet of the fine filter can be connected to the pan channel through the annular oil groove, ensuring that the oil filtered by the fine filter can smoothly flow back to the oil cavity of the crankcase through the oil outlet and the oil return channel, forming an oil filtration cycle.

[0009] Preferably, the oil inlet passage is arranged in the wall of the crankcase, one end of the oil inlet passage is connected to the threaded interface, and the other end of the oil inlet passage is communicated with the oil chamber of the crankcase. In this way, the oil inlet passage can be directly built into the wall of the crankcase without the need to arrange an external pipeline, which can reduce parts and save the installation steps of the corresponding external pipeline, which is conducive to reducing production costs and improving production efficiency.

[0010] Preferably, an annular boss is provided on the bottom surface of the oil pan, the threaded interface is located in the annular boss, the end surface of the annular boss forms a sealing connection surface, and the fine filter sealing ring forms a sealing connection between the fine filter and the sealing connection surface. In this way, it can be ensured that the fine filter sealing ring forms a sealing connection between the fine filter and the sealing connection surface, thereby ensuring a sealing connection between the fine filter and the bottom surface of the oil pan.

[0011] Preferably, the oil pan and the annular boss are an integrally formed structure.

[0012] Preferably, the fine filter is located at the front of the crankcase bottom. The position of the fine filter at the crankcase bottom can be arranged according to actual needs and different vehicle models to facilitate actual production and subsequent disassembly and replacement of the fine filter. In this solution, the fine filter is located at the front of the crankcase bottom.

[0013] Preferably, the fine filter is located in the middle of the crankcase bottom. The position of the fine filter at the crankcase bottom can be arranged according to actual needs and different vehicle models to facilitate actual production and subsequent disassembly and replacement of the fine filter. In this solution, the fine filter is located in the middle of the crankcase bottom.

[0014] Preferably, the fine filter is located at the rear of the crankcase bottom. The position of the fine filter at the crankcase bottom can be arranged according to actual needs and different vehicle models to facilitate actual production and subsequent disassembly and replacement of the fine filter. In this solution, the fine filter is located at the rear of the crankcase bottom.

[0015] Preferably, the oil pan has a protrusion protruding downward, and the protrusion is located on one side of the fine filter. In this way, on the one hand, the fine filter can avoid the protrusion on the oil pan, and on the other hand, the protrusion can play a certain protective role on one side of the fine filter.

[0016] Preferably, a side guard plate is provided on the bottom surface of the oil pan, and the fine filter is located between the protrusion and the side guard plate. In this way, the protrusion and the side guard plate can play a certain protective role on one side of the fine filter.

[0017] The beneficial effects of the present invention are as follows: on the one hand, the fine filter can be directly disassembled and replaced from the bottom of the crankcase, and the disassembly and replacement of the fine filter is not affected by other parts of the motorcycle, and the fine filter can be directly unscrewed, so the fine filter is convenient and quick to disassemble and replace, which can effectively improve the efficiency of disassembly and replacement of the fine filter, and is beneficial to the maintenance of the motorcycle engine; on the other hand, the fine filter is installed in an empty position under the crankcase, so that more space can be provided on the front or rear side of the crankcase to install other parts of the motorcycle, which is beneficial to the arrangement of other parts of the motorcycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1The present invention is a three-dimensional partial structural schematic diagram of the motorcycle external engine fine filter device.

[0019] Figure 2 The utility model is a partial side view of the motorcycle external engine fine filter device of the present invention.

[0020] Figure 3 It is a partial cross-sectional structural schematic diagram of an embodiment of a motorcycle external engine fine filter device of the present invention.

[0021] Figure 4 It is a partial cross-sectional structural schematic diagram of another embodiment of the motorcycle external engine fine filter device of the present invention.

[0022] In the figure: Fine filter 1, threaded inlet 1.1, fine filter sealing ring 1.2, oil outlet hole 1.3; Crankcase 2, oil inlet channel 2.1; Oil pan 3, protrusion 3.1, side guard plate 3.2, threaded interface 3.3, annular oil groove 3.4, pan channel 3.5; Threaded pipe joint 4; Bottom shell sealing ring 5; Annular detection groove 6; Monitoring sensor 7. DETAILED DESCRIPTION

[0023] Specific embodiment 1, as Figure 1-Figure 3 As shown, a motorcycle external engine fine filter device includes a fine filter 1, a threaded pipe joint 4, an oil inlet channel 2.1 and an oil return channel. A fine filter seal ring 1.2 and a threaded inlet 1.1 located inside the fine filter seal ring 1.2 are provided at one end of the fine filter 1. An oil outlet hole 1.3 is also provided at one end of the fine filter 1. The threaded inlet 1.1 is located in the middle of one end of the fine filter 1. The fine filter seal ring 1.2 is extended along the edge of one end of the fine filter 1. The oil outlet hole 1.3 is located between the threaded inlet 1.1 and the fine filter seal ring 1.2. The threaded pipe joint 4 refers to a pipe fitting with threads, and both ends of the threaded pipe joint 4 are provided with external threads. The fine filter is externally placed below the oil pan at the bottom of the crankcase (the "external" in the motorcycle external engine fine filter device in the text means that the fine filter is externally placed below the oil pan).

[0024] A threaded interface 3.3 is provided on the bottom surface of the oil pan 3 at the bottom of the crankcase 2 of the engine. Specifically, the crankcase 2 includes an upper case and a lower case, the upper case and the lower case are connected by bolts, and the oil pan 3 is connected to the lower end surface of the lower case by bolts. One end of the threaded pipe joint 4 is sealed with the threaded interface 3.3. The fine filter 1 is placed outside below the oil pan 3. The other end of the threaded pipe joint 4 is sealed with the threaded inlet 1.1. The fine filter sealing ring 1.2 forms a sealed connection between the fine filter 1 and the oil pan 3. Specifically, one end of the fine filter 1 is close to the bottom surface of the oil pan 3, so that the fine filter sealing ring 1.2 forms a sealed connection structure between the fine filter 1 and the oil pan 3.

[0025] The oil inlet channel 2.1 is connected to the oil chamber of the crankcase 2 and the threaded interface 3.3. Specifically, one end of the oil inlet channel 2.1 is connected to the threaded interface 3.3, and the other end of the oil inlet channel 2.1 is connected to the oil chamber of the crankcase. In this embodiment, the oil inlet channel 2.1 is arranged in the box wall of the crankcase 2, and the oil inlet channel 2.1 and the box wall of the crankcase 2 are an integrally formed structure. In this way, the oil inlet channel can be directly built into the box wall of the crankcase without the need to arrange additional external pipelines, which can reduce parts and eliminate the installation steps of corresponding external pipelines, which is conducive to reducing production costs and improving production efficiency.

[0026] The oil return channel connects the oil outlet hole 1.3 with the oil chamber of the crankcase 2. The oil in the oil chamber of the crankcase 2 enters the fine filter 1 through the oil inlet channel 2.1, and is filtered by the fine filter 1. The filtered oil flows back to the oil chamber of the crankcase 2 through the oil outlet hole 1.3 and the oil return channel, forming an oil filtration cycle.

[0027] Since other parts of the motorcycle are generally arranged on the front, rear and left and right sides of the crankcase 2 of the motorcycle (decorative panels are generally arranged on the left and right sides of the crankcase 2, and functional parts of the motorcycle are generally arranged on the front and rear sides), the structural space on the front, rear and left and right sides of the crankcase 2 is relatively compact; but there are generally no parts under the crankcase 2. Therefore, the fine filter 1 of this embodiment is installed in the threaded interface 3.3 on the bottom surface of the oil pan 3 at the bottom of the crankcase 2 of the motorcycle engine through the threaded pipe joint 4, so that the fine filter 1 is installed in an empty position below the crankcase 2 (the fine filter is externally arranged below the oil pan). In this way, on the one hand, the fine filter 1 can be directly disassembled and replaced from the bottom of the crankcase 2, and the disassembly and replacement of the fine filter 1 is not affected by other parts of the motorcycle (no other parts of the motorcycle need to be disassembled during the replacement of the fine filter). The disassembly can be completed by directly unscrewing the fine filter, and the installation can be completed by directly screwing on the fine filter. Therefore, the fine filter 1 is easy to disassemble and replace, which can effectively improve the efficiency of disassembly and replacement of the fine filter 1, which is beneficial to the maintenance of the motorcycle engine; on the other hand, the fine filter 1 is installed in the empty position below the crankcase 2, so that the front side or rear side of the crankcase 2 can also have more space to install other parts of the motorcycle, which is beneficial to the arrangement of other parts of the motorcycle.

[0028] Specific embodiment 2, as Figure 1-Figure 3 As shown, a motorcycle external engine fine filter device includes a fine filter 1, a threaded pipe joint 4, an oil inlet channel 2.1 and an oil return channel. A fine filter seal ring 1.2 and a threaded inlet 1.1 located inside the fine filter seal ring 1.2 are provided at one end of the fine filter 1. An oil outlet hole 1.3 is also provided at one end of the fine filter 1. The threaded inlet 1.1 is located in the middle of one end of the fine filter 1. The fine filter seal ring 1.2 is extended along the edge of one end of the fine filter 1. The oil outlet hole 1.3 is located between the threaded inlet 1.1 and the fine filter seal ring 1.2. The threaded pipe joint 4 refers to a pipe fitting with threads, and both ends of the threaded pipe joint 4 are provided with external threads. The fine filter is externally placed below the oil pan at the bottom of the crankcase.

[0029] The threaded pipe joint 4 refers to a pipe fitting with threads, and both ends of the threaded pipe joint 4 are provided with external threads.

[0030] A threaded interface 3.3 is provided on the bottom surface of the oil pan 3 at the bottom of the crankcase 2 of the engine. One end of a threaded pipe joint 4 is sealedly connected to the threaded interface 3.3. The fine filter 1 is externally arranged below the oil pan 3. The other end of the threaded pipe joint 4 is sealedly connected to the threaded inlet 1.1. The fine filter sealing ring 1.2 forms a sealed connection between the fine filter 1 and the oil pan 3. Specifically, one end of the fine filter 1 is closely attached to the bottom surface of the oil pan 3, so that the fine filter sealing ring 1.2 forms a sealed connection between the fine filter 1 and the oil pan 3.

[0031] The oil inlet channel 2.1 is connected to the oil chamber of the crankcase 2 and the threaded interface 3.3. Specifically, one end of the oil inlet channel 2.1 is connected to the threaded interface 3.3, and the other end of the oil inlet channel 2.1 is connected to the oil chamber of the crankcase. In this embodiment, the oil inlet channel 2.1 is arranged in the box wall of the crankcase 2, and the oil inlet channel 2.1 and the box wall of the crankcase 2 are an integrally formed structure. In this way, the oil inlet channel can be directly built into the box wall of the crankcase without the need to arrange additional external pipelines, which can reduce parts and eliminate the installation steps of corresponding external pipelines, which is conducive to reducing production costs and improving production efficiency.

[0032] The oil return channel connects the oil outlet hole 1.3 with the oil chamber of the crankcase 2. The oil in the oil chamber of the crankcase 2 enters the fine filter 1 through the oil inlet channel 2.1, and is filtered by the fine filter 1. The filtered oil flows back to the oil chamber of the crankcase 2 through the oil outlet hole 1.3 and the oil return channel, forming an oil filtration cycle.

[0033] Specifically, the crankcase 2 includes an upper case and a lower case, the upper case and the lower case are connected by bolts, and the oil pan 3 is connected to the lower end surface of the lower case by bolts. The oil inlet channel 2.1 is arranged in the case wall of the lower case of the crankcase 2, one end of the oil inlet channel 2.1 is connected to the lower end surface of the lower case of the crankcase 2, and the upper end of the threaded interface 3.3 is communicated with the upper end surface of the oil pan 3. One end of the oil inlet channel 2.1 is aligned with the upper end of the threaded interface 3.3, and the lower end surface of the lower case where one end of the oil inlet channel 2.1 is located is sealed and connected with the upper end surface of the oil pan 3 where the upper end of the threaded interface 3.3 is located, so that one end of the oil inlet channel 2.1 is sealed and connected with the upper end of the threaded interface 3.3.

[0034] Further, such as Figure 1 , Figure 2 As shown, the oil pan 3 has a protruding portion 3.1 protruding downward, and the protruding portion and the oil pan 3 are an integrally formed structure. The protruding portion is located on one side of the fine filter 1. In this way, on the one hand, the fine filter 1 can avoid the protruding portion on the oil pan 3, and on the other hand, the protruding portion can play a certain protective role on one side of the fine filter 1.

[0035] In one example, the lowest position of the fine filter 1 is higher than the lowest position of the protrusion on the oil pan 3. This arrangement can prevent the lowest position of the fine filter 1 from being too low and occupying too much lower space.

[0036] In another example, the lowest position of the fine filter 1 is lower than the lowest position of the protrusion on the oil sump 3. This is conducive to the arrangement of a fine filter 1 with a larger volume.

[0037] Further, such as Figure 1 , Figure 2As shown, a side guard plate 3.2 is provided on the bottom surface of the oil pan 3, and the side guard plate and the oil pan 3 are an integrally formed structure. The fine filter 1 is located between the protrusion and the side guard plate. In this way, the protrusion and the side guard plate can play a certain protective role on one side of the fine filter 1.

[0038] Further, such as Figure 3 As shown, the oil return channel includes a bottom shell channel 3.5 and a case channel, wherein the bottom shell channel 3.5 is arranged in the shell wall of the oil pan 3; the case channel is arranged in the case wall of the crankcase 2. One end of the bottom shell channel 3.5 is connected to the oil outlet hole 1.3, and the other end of the bottom shell channel 3.5 is connected to one end of the case channel. The other end of the case channel is connected to the oil chamber of the crankcase 2. In this way, the oil return channel can be directly built into the shell wall of the oil pan 3 and the case wall of the crankcase 2, without the need to arrange additional external pipelines, which can reduce parts and save the installation steps of the corresponding external pipelines, which is conducive to reducing production costs and improving production efficiency.

[0039] Further, such as Figure 3 As shown, the oil return channel also includes an annular oil groove 3.4. The annular oil groove 3.4 is arranged on the bottom surface of the oil pan 3. The opening of the annular oil groove 3.4 faces downward. The annular oil groove 3.4 is located between the fine filter sealing ring 1.2 and the threaded interface 3.3, so that one end of the fine filter 1 seals and covers the notch of the annular oil groove 3.4. The oil outlet hole 1.3 is connected to the notch of the annular oil groove 3.4. One end of the bottom shell channel 3.5 is connected to the annular oil groove 3.4. In this way, the oil outlet hole 1.3 of the fine filter 1 can be connected to the bottom shell channel 3.5 through the annular oil groove 3.4, ensuring that the engine oil filtered by the fine filter 1 can smoothly flow back to the oil chamber of the crankcase 2 through the oil outlet hole 1.3 and the oil return channel, forming an engine oil filtration cycle.

[0040] Further, such as Figure 3 As shown, an annular boss is provided on the bottom surface of the oil pan 3. The threaded interface 3.3 is located inside the annular boss. The end surface of the annular boss forms a sealing connection surface. The fine filter sealing ring 1.2 forms a sealing connection between the fine filter 1 and the sealing connection surface. In this way, it can be ensured that the fine filter sealing ring 1.2 forms a sealing connection between the fine filter 1 and the sealing connection surface, thereby ensuring a sealing connection between the fine filter 1 and the bottom surface of the oil pan 3.

[0041] In this embodiment, the end face of the annular boss is a machined plane, which can ensure the smoothness and flatness of the sealing connection surface, so as to ensure that the fine filter sealing ring 1.2 forms a sealed connection between the fine filter 1 and the sealing connection surface, thereby ensuring the sealed connection between the fine filter 1 and the bottom surface of the oil pan 3.

[0042] In this embodiment, the annular oil groove 3.4 is arranged on the end surface of the annular boss.

[0043] Since other parts of the motorcycle are generally arranged on the front, rear and left and right sides of the crankcase 2 of the motorcycle (decorative panels are generally arranged on the left and right sides of the crankcase 2, and functional parts of the motorcycle are generally arranged on the front and rear sides), the structural space on the front, rear and left and right sides of the crankcase 2 is relatively compact; but there are generally no parts under the crankcase 2. Therefore, the fine filter 1 of this embodiment is installed in the threaded interface 3.3 on the bottom surface of the oil pan 3 at the bottom of the crankcase 2 of the motorcycle engine through the threaded pipe joint 4, so that the fine filter 1 is installed in an empty position below the crankcase 2 (the fine filter is externally arranged below the oil pan). In this way, on the one hand, the fine filter 1 can be directly disassembled and replaced from the bottom of the crankcase 2, and the disassembly and replacement of the fine filter 1 is not affected by other parts of the motorcycle (no other parts of the motorcycle need to be disassembled during the replacement of the fine filter). The disassembly can be completed by directly unscrewing the fine filter, and the installation can be completed by directly screwing on the fine filter. Therefore, the fine filter 1 is easy to disassemble and replace, which can effectively improve the efficiency of disassembly and replacement of the fine filter 1, which is beneficial to the maintenance of the motorcycle engine; on the other hand, the fine filter 1 is installed in the empty position below the crankcase 2, so that the front side or rear side of the crankcase 2 can also have more space to install other parts of the motorcycle, which is beneficial to the arrangement of other parts of the motorcycle.

[0044] Specific embodiment 3: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, the difference is that: like Figure 4 As shown, a motorcycle external engine fine filter device also includes a bottom shell sealing ring 5. A sealing ring installation groove is provided on the bottom surface of the oil pan 3. The bottom shell sealing ring 5 is embedded in the sealing ring installation groove. The bottom shell sealing ring 5 is a solid sealing ring or a hollow sealing ring. The bottom shell sealing ring 5 surrounds the outside of the fine filter sealing ring 1.2. The bottom shell sealing ring 5 forms another sealing connection between the fine filter and the oil pan 3. In this way, an inner and outer two-way sealing connection structure can be formed between the fine filter and the oil pan 3 by the fine filter sealing ring 1.2 and the bottom shell sealing ring 5, thereby further effectively improving the sealing effect between the fine filter and the oil pan 3, and effectively avoiding the problem of oil leakage between the fine filter and the oil pan 3.

[0045] Further, such as Figure 4 As shown, a motorcycle external engine fine filter device also includes an annular detection groove 6 and a monitoring sensor 7. The annular detection groove 6 is arranged on the bottom surface of the oil pan 3, and the annular detection groove 6 is located between the fine filter seal ring 1.2 and the bottom shell seal ring 5. The monitoring sensor 7 is arranged on the oil pan 3, and the monitoring sensor 7 is used to detect the oil in the annular detection groove 6 in real time. Specifically, a mounting hole connected to the annular detection groove 6 is provided on the outer surface of the oil pan 3, and the monitoring sensor 7 is sealed and connected in the mounting hole, and the probe of the monitoring sensor 7 extends into the annular detection groove 6.

[0046] In this embodiment, a motorcycle external engine fine filter device also includes an alarm and a controller, the controller can be the original controller of the motorcycle, or an additional controller, the monitoring sensor 7 and the alarm are electrically connected to the controller respectively. The alarm can be a warning light and / or a buzzer.

[0047] During the long-term use of the motorcycle, the threads may become loose due to vibration (for example, the threaded interface between the threaded pipe joint and the oil pan 3 becomes loose, or the threaded interface between the threaded pipe joint and the threaded inlet of the fine filter becomes loose), resulting in oil leakage between the fine filter and the oil pan 3. In order to solve this problem, the present embodiment sets an annular detection groove 6 on the bottom surface of the oil pan 3 between the fine filter seal ring 1.2 and the bottom shell seal ring 5, and detects the oil in the annular detection groove 6 in real time through the monitoring sensor 7. When the seal formed by the fine filter seal ring 1.2 between the fine filter and the oil pan 3 leaks oil, the oil will enter between the fine filter seal ring 1.2 and the bottom shell seal ring 5 and accumulate in the annular detection groove 6. When the monitoring sensor 7 detects the accumulation of oil in the annular detection groove 6, an alarm can be issued to remind the user or maintenance personnel, so that the fine filter can be repaired in time.

[0048] In addition, the bottom shell sealing ring 5, the annular detection groove 6 and the monitoring sensor 7 of the present embodiment are all arranged on the oil pan 3, so that after replacing the fine filter, an inner and outer sealing connection structure can also be formed between the fine filter and the oil pan 3; and the normal operation of the monitoring sensor 7 will not be affected.

[0049] Specific embodiment 4: The rest of the structure of this embodiment refers to specific embodiment 1, specific embodiment 2 or specific embodiment 3, except that: The position of the fine filter 1 at the bottom of the crankcase 2 can be arranged according to actual needs and different vehicle models, so as to facilitate actual production and subsequent disassembly, assembly and replacement of the fine filter 1. In this embodiment, the fine filter 1 is located at the front of the bottom of the crankcase 2. The fine filter 1 is located at the front of the bottom of the crankcase 2, which is suitable for the situation where the front of the bottom of the crankcase 2 has a large vacant position, meets the actual needs of such vehicle models, and facilitates the actual production of such vehicle models and subsequent disassembly, assembly and replacement of the fine filter 1.

[0050] Specific embodiment 5: The rest of the structure of this embodiment refers to specific embodiment 1, specific embodiment 2 or specific embodiment 3, the difference is that: The position of the fine filter 1 at the bottom of the crankcase 2 can be arranged according to actual needs and different vehicle models, so as to facilitate actual production and subsequent disassembly and replacement of the fine filter 1. In this embodiment, the fine filter 1 is located in the middle of the bottom of the crankcase 2. The fine filter 1 is located in the middle of the bottom of the crankcase 2, which is suitable for the situation where there is a large vacant position in the middle of the bottom of the crankcase 2, and meets the actual needs of such vehicle models, so as to facilitate the actual production of such vehicle models and subsequent disassembly and replacement of the fine filter 1.

[0051] Specific embodiment 6: The rest of the structure of this embodiment refers to specific embodiment 1, specific embodiment 2 or specific embodiment 3, the difference is that: The position of the fine filter 1 at the bottom of the crankcase 2 can be arranged according to actual needs and different vehicle models, so as to facilitate actual production and subsequent disassembly, assembly and replacement of the fine filter 1. In this embodiment, the fine filter 1 is located at the rear of the bottom of the crankcase 2. The fine filter 1 is located at the rear of the bottom of the crankcase 2, which is suitable for applications where there is a large vacant position at the rear of the bottom of the crankcase 2, and meets the actual needs of such vehicle models, so as to facilitate the actual production of such vehicle models and subsequent disassembly, assembly and replacement of the fine filter 1.

[0052] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A motorcycle external engine fine filter device, characterized in that: include: A fine filter (1) is provided with an oil outlet hole (1.3) and a threaded inlet (1.1) at one end, and the fine filter (1) is externally arranged below an oil pan (3) at the bottom of a crankcase (2); A threaded pipe joint (4), a threaded interface (3.3) is provided on the bottom surface of the oil pan (3), one end of the threaded pipe joint (4) is sealedly connected to the threaded interface (3.3), and the other end of the threaded pipe joint (4) is sealedly connected to the threaded inlet (1.1) of the fine filter (1); An oil inlet passage connecting the oil chamber of the crankcase (2) and the oil inlet passage of the threaded interface (3.3); The oil return passage communicates the oil outlet hole (1.3) with the oil chamber of the crankcase (2).

2. A motorcycle external engine fine filter device according to claim 1, characterized in that: A fine filter sealing ring (1.2) is also provided at one end of the fine filter (1), the threaded inlet (1.1) is located inside the fine filter sealing ring (1.2), the oil outlet hole (1.3) is located between the threaded inlet (1.1) and the fine filter sealing ring (1.2), and the fine filter sealing ring (1.2) forms a sealed connection between the fine filter (1) and the oil pan (3).

3. A motorcycle external engine fine filter device according to claim 2, characterized in that: Also includes: A bottom shell sealing ring, wherein a sealing ring installation groove is provided on the bottom surface of the oil sump (3), the bottom shell sealing ring is embedded in the sealing ring installation groove, the bottom shell sealing ring surrounds the outside of the fine filter sealing ring (1.2), and the bottom shell sealing ring forms another sealing connection between the fine filter (1) and the oil sump (3); An annular detection groove is arranged on the bottom surface of the oil pan (3) and is located between the fine filter sealing ring (1.2) and the pan sealing ring; A monitoring sensor is arranged on the oil pan (3), and the monitoring sensor detects the engine oil in the annular detection groove in real time.

4. A motorcycle external engine fine filter device according to claim 1, 2 or 3, characterized in that: The oil return channel comprises a bottom shell channel and a case channel, wherein the bottom shell channel is arranged in the shell wall of the oil bottom shell (3), the case channel is arranged in the case wall of the crankcase (2), one end of the bottom shell channel is connected to the oil outlet hole (1.3), the other end of the bottom shell channel is connected to one end of the case channel, and the other end of the case channel is connected to the oil chamber of the crankcase (2).

5. The motorcycle external engine fine filter device according to claim 3, characterized in that: The oil return channel also includes an annular oil groove (3.4), which is arranged on the bottom surface of the oil pan (3) and located between the fine filter seal ring (1.2) and the threaded interface (3.3), the oil outlet hole (1.3) is connected to the annular oil groove (3.4), and one end of the pan channel is connected to the annular oil groove (3.4).

6. A motorcycle external engine fine filter device according to claim 1, 2 or 3, characterized in that: The oil inlet channel is arranged in the wall of the crankcase (2), one end of the oil inlet channel is connected to the threaded interface (3.3), and the other end of the oil inlet channel is communicated with the oil chamber of the crankcase.

7. A motorcycle external engine fine filter device according to claim 1, 2 or 3, characterized in that: An annular boss is provided on the bottom surface of the oil pan (3), the threaded interface (3.3) is located inside the annular boss, the end surface of the annular boss forms a sealing connection surface, and the fine filter sealing ring (1.2) forms a sealing connection between the fine filter (1) and the sealing connection surface.

8. A motorcycle external engine fine filter device according to claim 1, 2 or 3, characterized in that: The fine filter (1) is located at the front part of the bottom of the crankcase (2).

9. A motorcycle external engine fine filter device according to claim 1, 2 or 3, characterized in that: The fine filter (1) is located in the middle of the bottom of the crankcase (2).

10. A motorcycle external engine fine filter device according to claim 1, 2 or 3, characterized in that: The fine filter (1) is located at the rear of the bottom of the crankcase (2).

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