Evaporation structure for leaked liquid of motorcycle

Abstract

The motorcycle leaked liquid evaporation structure is used for being installed at an engine assembly, the engine assembly comprises a box body, a crankcase is arranged in the box body, an oil pump shaft is rotationally arranged in the crankcase, an impeller cavity is formed in the side of the crankcase, a water pump impeller is installed in the impeller cavity, and a transmission shaft is arranged between the crankcase and the impeller cavity in a penetrating mode; the oil pump shaft is in transmission connection with the water pump impeller through the transmission shaft and used for driving the water pump impeller to rotate, a sealing assembly is arranged between the crankcase and the impeller cavity and on the periphery of the transmission shaft and used for isolating oil in the crankcase from cooling liquid in the impeller cavity, and a liquid outlet is formed in the box body and penetrates through the side wall of the box body. The sealing assembly is communicated downwards to the bottom side of the box body, a liquid receiving groove is detachably installed on the bottom side of the box body, and after the liquid receiving groove is installed, the liquid receiving groove is located under the liquid discharging opening and used for receiving liquid discharged from the liquid discharging opening. According to the invention, liquid discharged from the liquid outlet is prevented from dropping on the ground and the box body.

Description

Technical Field

[0001] The invention relates to the technical field of motorcycles, in particular to a liquid leakage evaporation structure for a motorcycle. Background Art

[0002] In recent years, motorcycle manufacturers have been actively developing low-pollution, low-fuel-consumption and high-performance engines. Among them, the side-water-cooled engine technology has become one of the engine technologies for small and medium-sized scooters that combines low fuel consumption and high-performance output due to its compact design.

[0003] The water pump of this type of engine is arranged on the side of the engine case, and the power of the oil pump shaft in the crankcase is led out to the impeller cavity through the transmission shaft, driving the impeller to rotate and realize pumping coolant. In order to prevent the oil in the crankcase from entering the impeller cavity, and to prevent the coolant in the impeller cavity from entering the crankcase, a sealing structure (i.e., oil seal) is usually arranged between the outer periphery of the transmission shaft and the case. However, under the design of the existing sealing structure, the coolant may leak slightly from the oil seal. Therefore, in order to discharge the leaked liquid, a drain port is usually opened on the case to discharge the leaked liquid directly to the outside and drip onto the ground. The coolant is usually ethylene glycol water-based antifreeze. The discharged coolant drips onto the ground, which will pollute the environment and will also flow along the wall of the case, causing dirt on the surface of the case. Summary of the invention

[0004] The purpose of the present invention is to provide a motorcycle leakage evaporation structure, and the technical problem to be solved is how to prevent the liquid discharged from the liquid discharge port from dripping onto the ground and the box body.

[0005] To achieve the above-mentioned purpose, the solution of the present invention is: a motorcycle leakage evaporation structure for installation at an engine assembly, the engine assembly includes a housing, a crankcase is provided in the housing, an oil pump shaft is rotatably arranged in the crankcase, an impeller cavity is provided on the side of the crankcase, a water pump impeller is installed in the impeller cavity, a transmission shaft is provided through the crankcase and the impeller cavity, the oil pump shaft is connected to the water pump impeller through the transmission shaft, and is used to drive the water pump impeller to rotate, a sealing assembly is provided on the periphery of the transmission shaft between the crankcase and the impeller cavity, the sealing assembly is used to isolate the oil in the crankcase from the coolant in the impeller cavity, a drain port is provided in the housing, the drain port passes through the side wall of the housing, and is connected downward to the bottom side of the housing from the sealing assembly, a liquid collecting tank is detachably installed on the bottom side of the housing, and after the liquid collecting tank is installed, it is located directly below the drain port, and is used to receive the liquid discharged from the drain port.

[0006] Further, the sealing assembly includes a mechanical oil seal and a second oil seal;

[0007] The mechanical oil seal comprises an oil seal seat, a stationary ring, a dynamic ring and an elastic extrusion piece. The oil seal seat, the stationary ring and the dynamic ring surround the outer circumference of the transmission shaft respectively. The oil seal seat is located on the side of the dynamic ring close to the crankcase. The outer ring of the oil seal seat forms a seal with the inner wall of the case. The stationary ring is slidably sleeved on the oil seal seat. A seal is formed between the inner ring and the oil seal seat. The dynamic ring rotates with the transmission shaft and forms a seal with the transmission shaft or the impeller. The elastic extrusion piece elastically pushes against the stationary ring so that the stationary ring abuts against the dynamic ring along the axial direction to limit the coolant in the impeller cavity from flowing to the crankcase side.

[0008] The second oil seal sleeve is arranged on the outer periphery of the transmission shaft, and is located on the side of the mechanical oil seal close to the crankcase. The second oil seal is used to isolate the oil in the crankcase from entering between the second oil seal and the mechanical oil seal;

[0009] One end of the drain port located in the box body is connected to between the mechanical oil seal and the second oil seal.

[0010] Furthermore, a liquid gap is formed between the oil seal seat and the transmission shaft, and between the side of the oil seal seat close to the crankcase and the case body, so as to communicate from the axial abutment between the dynamic ring and the static ring to the drain port.

[0011] Furthermore, the second oil seal is a rubber oil seal, the outer ring of which is elastically pressed against the inner wall of the box body, and the inner ring of which is elastically pressed against the transmission shaft.

[0012] Furthermore, a slot is formed on the outer wall of the box body, and the liquid receiving tank slides into or out of the slot so as to be detachably mounted on the bottom side of the box body.

[0013] Furthermore, after the liquid receiving trough is installed, at least the bottom wall or part of the side wall is in contact with the box body.

[0014] Furthermore, a liquid discharge port is formed in the liquid receiving tank, the liquid discharge port is spaced apart from the tank bottom height of the liquid receiving tank, and the liquid discharge port is downwardly connected to the outside of the liquid receiving tank.

[0015] Furthermore, the liquid discharge port is connected to the outside of the liquid receiving tank through a one-way valve structure so that the liquid can only be discharged to the outside of the liquid receiving tank.

[0016] Furthermore, after the liquid receiving tank is installed in the box body, the top can be connected to the atmosphere.

[0017] After adopting the above scheme, the beneficial effects of the present invention are: a transmission shaft is arranged between the crankcase and the impeller cavity, and a sealing assembly is arranged on the periphery of the transmission shaft between the crankcase and the impeller cavity, the sealing assembly is used to isolate the oil in the crankcase from the coolant in the impeller cavity, the case body is provided with a drain port, the drain port passes through the side wall of the case body, and is downwardly connected to the bottom side of the case body from the sealing assembly, and a liquid receiving tank is detachably installed on the bottom side of the case body, and after the liquid receiving tank is installed, it is located directly below the drain port, and is used to receive the liquid discharged from the drain port, so as to realize the export of the liquid seeping from the sealing assembly, so that the liquid can be discharged out of the case body, so as to avoid the oil in the crankcase and the coolant in the impeller cavity from mixing with each other to cause functional failure, and after the liquid is discharged from the case body, it will be collected by the liquid receiving tank, and then evaporated by the heat of the outside world and the engine, so as to avoid the liquid discharged from the drain port from dripping onto the ground and the case body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the present invention;

[0019] Figure 2 A cross-sectional view of another direction of the present invention;

[0020] Figure 3 An exploded view of the present invention;

[0021] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0022] Figure 5 This is a structural diagram of the present invention when it is arranged in a box;

[0023] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0024] Figure 7 It is a schematic diagram of the structure of the liquid receiving tank.

[0025] Explanation of numbers: 1-casing, 2-crankcase, 3-oil pump shaft, 4-impeller chamber, 5-water pump impeller, 6-transmission shaft, 7-sealing assembly, 8-drain port, 9-liquid collecting tank, 10-mechanical oil seal, 11-second oil seal, 12-oil seal seat, 13-static ring, 14-dynamic ring, 15-elastic extrusion part, 17-drain port, 18-slot, 19-liquid gap, 20-hollow, 21-oil, 22-coolant. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The following will fully describe embodiments of the present invention with reference to the accompanying drawings. It should be noted that the present invention can be implemented in different forms and is not limited to the embodiments illustrated herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0028] A motorcycle leakage evaporation structure, such as Figure 1-7 As shown, it is used to be installed at an engine assembly, the engine assembly includes a housing 1, a crankcase 2 is provided in the housing 1, an oil pump shaft 3 is arranged in the crankcase 2, the oil pump shaft 3 is driven by the crankshaft in the housing 1 to rotate to realize pumping oil 21, which is a conventional design on the engine and will not be further described in detail in this embodiment;

[0029] An impeller chamber 4 is provided beside the crankcase 2, and a water pump impeller 5 is installed in the impeller chamber 4. A transmission shaft 6 is provided between the crankcase 2 and the impeller chamber 4, and the oil pump shaft 3 is connected to the water pump impeller 5 through the transmission shaft 6, so as to drive the water pump impeller 5 to rotate, and then pump the coolant 22 in the impeller chamber 4 out of the impeller chamber 4 to realize the cooling of the engine. This is also a conventional design on the engine and will not be further described in detail in this embodiment.

[0030] A sealing assembly 7 is provided on the periphery of the transmission shaft 6 between the crankcase 2 and the impeller chamber 4. The structure of the sealing assembly 7 is not specifically limited. A preferred embodiment is given later. The sealing assembly 7 is used to isolate the oil 21 in the crankcase 2 from the coolant 22 in the impeller chamber 4. The casing 1 is provided with a drain port 8, which runs through the side wall of the casing 1 and is downwardly connected to the bottom side of the casing 1 from the sealing assembly 7. When the oil 21 or the coolant 22 penetrates the sealing assembly 7, it can be discharged from the drain port 8 to the bottom side of the casing 1 to avoid environmental pollution. A liquid collecting tank 9 is detachably installed on the bottom side of the casing 1. After the liquid collecting tank 9 is installed, it is located directly below the drain port 8 to receive the liquid discharged from the drain port 8. After the liquid collecting tank 9 is installed in the casing 1, the top can be connected to the atmosphere. After entering the liquid collecting tank 9, the oil 21 or the coolant 22 can evaporate into the air to avoid directly dripping onto the ground or the outer wall of the casing 1.

[0031] Preferably, in this embodiment, the sealing assembly 7 includes a mechanical oil seal 10 and a second oil seal 11; the mechanical oil seal 10 has an oil seal seat 12, a stationary ring 13, a dynamic ring 14 and an elastic extrusion member 15, the oil seal seat 12, the stationary ring 13 and the dynamic ring 14 respectively surround the outer periphery of the transmission shaft 6, and are all located on the side of the water pump impeller 5 close to the crankcase 2, and the oil seal seat 12 is located on the side of the dynamic ring 14 close to the crankcase 2, the outer ring of the oil seal seat 12 forms a seal with the inner wall of the housing 1, and the stationary ring 13 is slidably sleeved on the oil seal seat 12 , a seal is formed between the inner ring and the oil seal seat 12, the dynamic ring 14 rotates with the transmission shaft 6, and forms a seal with the transmission shaft 6 or the water pump impeller 5. Specifically in this embodiment, the dynamic ring 14 is close to the side of the water pump impeller 5, and the seal abuts on the water pump impeller 5. The elastic extrusion piece 15 is between the static ring 13 and the oil seal seat 12, and elastically pushes the static ring 13, so that the static ring 13 axially abuts on the dynamic ring 14 to form a mechanical oil seal 10, so as to limit the coolant 22 in the impeller cavity 4 from flowing to the crankcase 2 side; The second oil seal 11 is sleeved on the outer periphery of the transmission shaft 6 and is located on the side of the mechanical oil seal 10 close to the crankcase 2. The second oil seal 11 is used to isolate the oil 21 in the crankcase 2 from entering between the second oil seal 11 and the mechanical oil seal 10. The second oil seal 11 can be any existing oil seal structure. Preferably, in this embodiment, the second oil seal 11 is a rubber oil seal, the outer ring of which is elastically pressed against the inner wall of the box body 1, and the inner ring of which is elastically pressed against the transmission shaft 6; one end of the drain port 8 located in the box body 1 is connected to the mechanical oil seal 10 and between the mechanical oil seal 10 and the second oil seal 11; during operation, the coolant 22 in the impeller chamber 4 will enter the abutting contact position between the dynamic ring 14 and the static ring 13 to form a liquid film, which on the one hand enhances the sealing between the dynamic ring 14 and the static ring 13, and on the other hand lubricates the friction between the dynamic ring 14 and the static ring 13. However, this will cause a small amount of coolant 22 to penetrate between the mechanical oil seal 10 and the second oil seal 11, and the drain port 8 is used to discharge the coolant 22 that has penetrated between the mechanical oil seal 10 and the second oil seal 11.

[0032] Specifically in the present embodiment, a liquid gap 19 is formed between the oil seal seat 12 and the transmission shaft 6, and between the side of the oil seal seat 12 close to the crankcase 2 and the housing 1, so as to be connected to the drain port 8 through the axial abutment between the driven ring 14 and the stationary ring 13, and then penetrate into the coolant 22 between the mechanical oil seal 10 and the second oil seal 11, first enter the liquid gap 19 between the oil seal seat 12 and the transmission shaft 6, then enter the liquid gap 19 between the side of the oil seal seat 132 close to the crankcase 2 and the housing 1, and finally flow out from the drain port 8 to the outside of the housing 1.

[0033] In order to better conduct the heat generated during the operation of the engine components to the liquid receiving tank 9 to accelerate the evaporation of the coolant 22 in the liquid receiving tank 9, it is preferred that after the liquid receiving tank 9 is installed, at least the bottom wall or part of the side wall is in contact with the box body 1.

[0034] To facilitate the installation of the liquid receiving trough 9, a slot 18 is preferably formed on the outer wall of the box body 1, and the liquid receiving trough 9 slides into or out of the slot 18 so as to be detachably installed on the bottom side of the box body 1. More specifically, the notch of the slot 18 is located on the side wall of the box body 1, and the cross-sectional shape matches the shape of the liquid receiving trough 9. The liquid receiving trough 9 is laterally inserted into the slot 18 and embedded in the box body 1.

[0035] A liquid discharge port 17 is formed in the liquid receiving tank 9, and the liquid discharge port 17 is spaced apart from the bottom height of the liquid receiving tank 9. The liquid discharge port 17 is downwardly connected to the outside of the liquid receiving tank 9, and the slot 18 is hollowed out at this position. When the liquid level in the liquid receiving tank 9 is too high, it can be discharged downward from the liquid discharge port 17 to avoid dripping onto the box body 1.

[0036] Preferably, muddy water splashed during the running of the motorcycle is prevented from entering the liquid receiving tank 9 from the liquid discharge port 17 . The liquid discharge port 17 is connected to the outside of the liquid receiving tank 9 through a one-way valve structure so that liquid can only be discharged to the outside of the liquid receiving tank 9 .

[0037] The above description is only a preferred embodiment of the present invention and is not a limitation on the design of this case. Any equivalent changes made based on the design key of this case shall fall within the protection scope of this case.

Claims

1. A motorcycle leakage evaporation structure, used for installation at an engine assembly, characterized in that: The engine assembly comprises a housing (1), wherein the housing (1) has a crankcase (2), an oil pump shaft (3) is rotatably arranged in the crankcase (2), an impeller chamber (4) is arranged beside the crankcase (2), a water pump impeller (5) is installed in the impeller chamber (4), a transmission shaft (6) is arranged between the crankcase (2) and the impeller chamber (4), the oil pump shaft (3) is connected to the water pump impeller (5) through the transmission shaft (6), and is used to drive the water pump impeller (5) to rotate, and between the crankcase (2) and the impeller chamber (4), A sealing assembly (7) is arranged on the periphery of the transmission shaft (6), and the sealing assembly (7) is used to isolate the oil in the crankcase (2) from the coolant in the impeller chamber (4). The casing (1) is provided with a drain port (8), and the drain port (8) penetrates the side wall of the casing (1) and is connected downward from the sealing assembly (7) to the bottom side of the casing (1). A liquid receiving trough (9) is detachably installed on the bottom side of the casing (1). After the liquid receiving trough (9) is installed, it is located directly below the drain port (8) and is used to receive liquid discharged from the drain port (8).

2. A motorcycle leakage evaporation structure as claimed in claim 1, characterized in that: The sealing assembly (7) comprises a mechanical oil seal (10) and a second oil seal (11); The mechanical oil seal (10) comprises an oil seal seat (12), a stationary ring (13), a dynamic ring (14) and an elastic extrusion piece (15). The oil seal seat (12), the stationary ring (13) and the dynamic ring (14) respectively surround the outer periphery of the transmission shaft (6). The oil seal seat (12) is located on the side of the dynamic ring (14) close to the crankcase (2). The outer ring of the oil seal seat (12) forms a seal with the inner wall of the case (1). The stationary ring (13) is slidably sleeved on the oil seal seat (12). The inner ring and the oil seal seat (12) form a seal. The dynamic ring (14) rotates with the transmission shaft (6) and forms a seal with the transmission shaft (6) or the water pump impeller (5). The elastic extrusion piece (15) elastically pushes against the stationary ring (13) so that the stationary ring (13) abuts against the dynamic ring (14) along the axial direction to limit the coolant in the impeller cavity (4) from flowing to the crankcase (2) side. The second oil seal (11) is sleeved on the outer periphery of the transmission shaft (6) and is located on a side of the mechanical oil seal (10) close to the crankcase (2). The second oil seal (11) is used to prevent the oil in the crankcase (2) from entering between the second oil seal (11) and the mechanical oil seal (10); One end of the liquid discharge port (8) located in the housing (1) is connected to between the mechanical oil seal (10) and the second oil seal (11).

3. A motorcycle leakage evaporation structure as claimed in claim 2, characterized in that: A liquid gap (19) is formed between the oil seal seat (12) and the transmission shaft (6), and between the side of the oil seal seat (12) close to the crankcase (2) and the crankcase body (1), respectively, so as to be connected to the drain port (8) from the axial abutment between the driven ring (14) and the stationary ring (13).

4. A motorcycle leakage evaporation structure as claimed in claim 2, characterized in that: The second oil seal (11) is a rubber oil seal, the outer ring of which is elastically pressed against the inner wall of the box body (1), and the inner ring of which is elastically pressed against the transmission shaft (6).

5. A motorcycle leakage evaporation structure as claimed in claim 1, characterized in that: A slot (18) is formed on the outer wall of the box body (1), and the liquid receiving groove (9) slides into or out of the slot (18) so as to be detachably mounted on the bottom side of the box body (1).

6. A motorcycle leakage evaporation structure as claimed in claim 1, characterized in that: After the liquid receiving tank (9) is installed, at least the bottom wall or part of the side wall is in contact with the box body (1).

7. A motorcycle leakage evaporation structure as claimed in claim 1, characterized in that: A liquid discharge port (17) is formed in the liquid receiving tank (9), the liquid discharge port (17) is spaced apart from the bottom of the liquid receiving tank (9) in height, and the liquid discharge port (17) is downwardly connected to the outside of the liquid receiving tank (9).

8. A motorcycle leakage evaporation structure as claimed in claim 7, characterized in that: The liquid discharge port (17) is connected to the outside of the liquid receiving tank (9) via a one-way valve structure so that liquid can only be discharged to the outside of the liquid receiving tank (9).

9. A motorcycle leakage evaporation structure as claimed in claim 1, characterized in that: After the liquid receiving tank (9) is installed on the box body (1), the top can be connected to the atmosphere.

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