Evaporation structure for leaked liquid of motorcycle

Abstract

The utility model discloses a motorcycle leaked liquid evaporation structure which is used for being installed on an engine assembly, the engine assembly comprises a box body, a crankcase is arranged in the box body, an oil pump shaft is arranged in the crankcase in a rotating mode, an impeller cavity is arranged beside 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 utility model, liquid discharged from the liquid outlet is prevented from dropping on the ground and the box body.

Description

Technical Field

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

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

[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 drive 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 provided between the outer periphery of the drive 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. Utility Model Content

[0004] The utility model aims to provide a liquid leakage evaporation structure for a motorcycle, and solves the technical problem of 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 being installed at the engine assembly, the engine assembly includes a box body, a crankcase is provided in the box body, an oil pump shaft is rotatably arranged in the crankcase, an impeller chamber is provided next to the crankcase, a water pump impeller is installed in the impeller chamber, a transmission shaft is provided between the crankcase and the impeller chamber, the oil pump shaft is connected to the water pump impeller through the transmission shaft, for driving the water pump impeller to rotate, a sealing assembly is provided on the periphery of the transmission shaft between the crankcase and the impeller chamber, the sealing assembly is used to isolate the oil in the crankcase from the coolant in the impeller chamber, the box body is provided with a drain port, the drain port passes through the side wall of the box body, and is downwardly connected to the bottom side of the box body from the sealing assembly, the bottom side of the box body is detachably installed with a liquid collecting trough, and after the liquid collecting trough is installed, it is located directly below the drain port, for receiving the liquid discharged from the drain port.

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

[0007] The mechanical oil seal has an oil seal seat, a stationary ring, a rotating ring and an elastic pressing member. The oil seal seat, the stationary ring and the rotating ring respectively surround the outer periphery of the transmission shaft. The oil seal seat is located on the side of the rotating ring close to the crankcase. A seal is formed between the outer ring of the oil seal seat and the inner wall of the casing. The stationary ring is slidably sleeved on the oil seal seat, and a seal is formed between the inner ring and the oil seal seat. The rotating ring rotates with the transmission shaft and forms a seal with the transmission shaft or the impeller. The elastic pressing member elastically pushes against the stationary ring, so that the stationary ring axially abuts against the rotating ring to limit the coolant in the impeller cavity from flowing to the crankcase side;

[0008] The second oil seal is sleeved 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 inside the casing communicates to the space between the mechanical oil seal and the second oil seal.

[0010] Furthermore, a liquid passing gap is respectively 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 casing, so as to communicate from the axial abutting position of the rotating ring and the stationary ring to the drain port.

[0011] Furthermore, the second oil seal is a rubber oil seal, the outer ring elastically abuts against the inner wall of the casing, and the inner ring elastically abuts against the transmission shaft.

[0012] Furthermore, a slot is formed on the outer wall of the casing, and the liquid receiving groove slides into or out of the slot to be detachably installed on the bottom side of the casing.

[0013] Furthermore, after the liquid receiving groove is installed, at least the bottom wall or part of the side walls are in contact with the casing.

[0014] Furthermore, a drain opening is formed in the liquid receiving groove, the drain opening is spaced from the bottom of the liquid receiving groove in height, and the drain opening communicates downward to the outside of the liquid receiving groove.

[0015] Furthermore, the drain opening communicates to the outside of the liquid receiving groove through a one-way valve structure to only be able to drain liquid to the outside of the liquid receiving groove.

[0016] Furthermore, after the liquid receiving groove is installed on the casing, the top can communicate with the atmosphere.

[0017] After adopting the above scheme, the beneficial effects of the present utility model are as follows: A transmission shaft is arranged through between the crankcase and the impeller chamber. Between the crankcase and the impeller chamber, a sealing assembly is arranged around the transmission shaft. The sealing assembly is used to isolate the oil liquid in the crankcase from the coolant in the impeller chamber. The box body is provided with a liquid discharge port, which penetrates through the side wall of the box body and communicates downward from the sealing assembly to the bottom side of the box body. A liquid receiving groove is detachably installed at the bottom side of the box body. After the liquid receiving groove is installed, it is located directly below the liquid discharge port and is used to receive the liquid discharged from the liquid discharge port, so as to be able to export the liquid seeping out from the sealing assembly, enable the liquid to be discharged outside the box body, avoid the mutual mixing of the oil liquid in the crankcase and the coolant in the impeller chamber from causing functional failures. After the liquid is discharged from the box body, it will be collected by the liquid receiving groove and then evaporated by the heat of the outside and the engine, avoiding the liquid discharged from the liquid discharge port from dripping onto the ground and the box body. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 is a cross-sectional view of the present utility model in another direction;

[0020] Figure 3 is an exploded view of the present utility model;

[0021] Figure 4 is Figure 3 a partial enlarged view of part A in

[0022] Figure 5 is a structural diagram of the present utility model when arranged on the box body;

[0023] Figure 6 is Figure 5 a partial enlarged view of part B in

[0024] Figure 7 is a structural schematic diagram of the liquid receiving groove.

[0025] Reference numeral description: 1 - box body, 2 - crankcase, 3 - oil pump shaft, 4 - impeller chamber, 5 - water pump impeller, 6 - transmission shaft, 7 - sealing assembly, 8 - liquid discharge port, 9 - liquid receiving groove, 10 - mechanical oil seal, 11 - second oil seal, 12 - oil seal seat, 13 - stationary ring, 14 - moving ring, 15 - elastic extrusion member, 17 - liquid discharge port, 18 - slot, 19 - liquid passing gap, 20 - hollowing, 21 - oil liquid, 22 - coolant. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will describe the present utility model in detail with reference to the accompanying drawings and specific embodiments.

[0027] Embodiments of the present utility model will be described comprehensively below with reference to the accompanying drawings. It should be noted that the present utility model 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 utility model to those skilled in the art.

[0028] A liquid leakage evaporation structure for a motorcycle, as Figure 1-7 shown, is used to be installed at the engine assembly. The engine assembly includes a box body 1. There is a crankcase 2 inside the box body 1. A fuel pump shaft 3 is arranged inside the crankcase 2. The fuel pump shaft 3 rotates driven by the crankshaft inside the box body 1 to realize pumping of the oil liquid 21, which is a conventional design on the engine and will not be further elaborated in this embodiment;

[0029] There is an impeller chamber 4 beside the crankcase 2. A water pump impeller 5 is installed inside the impeller chamber 4. A transmission shaft 6 is arranged through between the crankcase 2 and the impeller chamber 4. The fuel pump shaft 3 is drivingly connected to the water pump impeller 5 through the transmission shaft 6 to drive the water pump impeller 5 to rotate, and then pump the coolant 22 inside the impeller chamber 4 out of the impeller chamber 4 to realize cooling of the engine, which is also a conventional design on the engine and will not be further elaborated in this embodiment;

[0030] Between the crankcase 2 and the impeller chamber 4, a sealing assembly 7 is arranged around the transmission shaft 6. The structure of the sealing assembly 7 is not specifically limited, and a preferred embodiment will be given later. The sealing assembly 7 is used to isolate the oil liquid 21 inside the crankcase 2 from the coolant 22 inside the impeller chamber 4. The box body 1 is provided with a liquid discharge port 8. The liquid discharge port 8 penetrates through the side wall of the box body 1 and communicates downward from the sealing assembly 7 to the bottom side of the box body 1. Thus, when the oil liquid 21 or the coolant 22 seeps into the sealing assembly 7, it can be discharged to the bottom side of the box body 1 through the liquid discharge port 8 to avoid environmental pollution. A liquid receiving groove 9 is detachably installed at the bottom side of the box body 1. After the liquid receiving groove 9 is installed, it is located directly below the liquid discharge port 8 and is used to receive the liquid discharged from the liquid discharge port 8. After the liquid receiving groove 9 is installed on the box body 1, its top can communicate with the atmosphere. After the oil liquid 21 or the coolant 22 enters the liquid receiving groove 9, it can evaporate into the air to avoid directly dripping onto the ground or the outer wall of the box body 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 rotating ring 14 and an elastic extrusion member 15. The oil seal seat 12, the stationary ring 13 and the rotating ring 14 are respectively arranged around 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 rotating 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 box body 1. The stationary ring 13 is slidably sleeved on the oil seal seat 12, and a seal is formed between the inner ring and the oil seal seat 12. The rotating ring 14 rotates with the transmission shaft 6, and a seal is formed between the rotating ring 14 and the transmission shaft 6 or the water pump impeller 5. Specifically, in this embodiment, on the side of the rotating ring 14 close to the water pump impeller 5, it is sealed and abutted against the water pump impeller 5. The elastic extrusion member 15 is between the stationary ring 13 and the oil seal seat 12, and elastically pushes against the stationary ring 13, so that the stationary ring 13 abuts against the rotating ring 14 axially to form the mechanical oil seal 10, so as to restrict the coolant 22 in the impeller chamber 4 from flowing to the side of the crankcase 2; 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 fluid 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 is elastically abutted against the inner wall of the box body 1, and the inner ring is elastically abutted against the transmission shaft 6; one end of the liquid discharge port 8 in the box body 1 is communicated to between the mechanical oil seal 10 and the second oil seal 11; during the working process, the coolant 22 in the impeller chamber 4 will enter the abutting contact position between the rotating ring 14 and the stationary ring 13 to form a liquid film. On the one hand, it enhances the seal between the rotating ring 14 and the stationary ring 13, and on the other hand, it lubricates the friction between the rotating ring 14 and the stationary ring 13. However, this will cause a small amount of the coolant 22 to seep into the space between the mechanical oil seal 10 and the second oil seal 11, and the liquid discharge port 8 is used to discharge the coolant 22 that has seeped into the space between the mechanical oil seal 10 and the second oil seal 11.

[0032] Specifically, in this embodiment, a liquid passing gap 19 is respectively 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 box body 1, so as to communicate from the axial abutting position of the rotating ring 14 and the stationary ring 13 to the liquid discharge port 8. Furthermore, the coolant 22 that seeps into the space between the mechanical oil seal 10 and the second oil seal 11 first enters the liquid passing gap 19 between the oil seal seat 12 and the transmission shaft 6, then enters the liquid passing gap 19 between the side of the oil seal seat 132 close to the crankcase 2 and the box body 1, and finally flows out of the box body 1 from the liquid discharge port 8.

[0033] To enable the heat generated during the working process of the engine assembly to be better conducted to the liquid receiving groove 9 to accelerate the evaporation of the coolant 22 in the liquid receiving groove 9, preferably, after the liquid receiving groove 9 is installed, at least the bottom wall or part of the side wall is attached to the box body 1.

[0034] For the convenience of installing the liquid receiving tank 9, it is preferred that a slot 18 is formed on the outer wall of the box body 1. The liquid receiving tank 9 slides into or out of the slot 18 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 tank 9. The liquid receiving tank 9 is horizontally 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. The liquid discharge port 17 is spaced from the bottom of the liquid receiving tank 9 in height. The liquid discharge port 17 communicates downward to the outside of the liquid receiving tank 9. The slot 18 forms a hollow 20 at this position. Thus, 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, to prevent the muddy water splashed during the motorcycle driving from entering the liquid receiving tank 9 through 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 to only discharge the liquid to the outside of the liquid receiving tank 9.

[0037] The above are only the preferred embodiments of the present invention, and do not limit the design of this case. All equivalent changes made according to the key design of this case fall within the protection scope of this case.

Claims

1. A liquid leakage evaporation structure for a motorcycle, which is used to be installed at an engine assembly, and is characterized in that: The engine assembly includes a housing (1). Inside the housing (1), there is a crankcase (2). Inside the crankcase (2), an oil pump shaft (3) is rotatably arranged. A water impeller chamber (4) is arranged beside the crankcase (2). A water pump impeller (5) is installed inside the water impeller chamber (4). A transmission shaft (6) penetrates between the crankcase (2) and the water impeller chamber (4). The oil pump shaft (3) is drivingly connected to the water pump impeller (5) through the transmission shaft (6) to drive the water pump impeller (5) to rotate. Between the crankcase (2) and the water impeller chamber (4), a sealing assembly (7) is arranged around the outer periphery of the transmission shaft (6). The sealing assembly (7) is used to isolate the oil in the crankcase (2) from the coolant in the water impeller chamber (4). The housing (1) is provided with a liquid discharge port (8). The liquid discharge port (8) penetrates the side wall of the housing (1) and communicates downward from the sealing assembly (7) to the bottom side of the housing (1). A liquid receiving groove (9) is detachably installed at the bottom side of the housing (1). After the liquid receiving groove (9) is installed, it is located directly below the liquid discharge port (8) and is used to receive the liquid discharged from the liquid discharge port (8).

2. The liquid leakage evaporation structure of a motorcycle according to claim 1, characterized in that: 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 rotating ring (14), and an elastic pressing member (15). The oil seal seat (12), the stationary ring (13), and the rotating ring (14) respectively surround the outer periphery of the transmission shaft (6). The oil seal seat (12) is located on the side of the rotating ring (14) close to the crankcase (2). The outer circle of the oil seal seat (12) forms a seal with the inner wall of the housing (1). The stationary ring (13) is slidably sleeved on the oil seal seat (12) and forms a seal between the inner circle and the oil seal seat (12). The rotating 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 pressing member (15) elastically presses against the stationary ring (13) to axially abut the stationary ring (13) against the rotating ring (14) to limit the flow of the coolant in the water impeller chamber (4) to the side of the crankcase (2); 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 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) inside the housing (1) communicates between the mechanical oil seal (10) and the second oil seal (11).

3. The liquid leakage evaporation structure of a motorcycle according to claim 2, wherein: Liquid passing gaps (19) are respectively 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) to communicate from the axial abutting position of the rotating ring (14) and the stationary ring (13) to the liquid discharge port (8).

4. The liquid leakage evaporation structure of a motorcycle according to claim 2, characterized in that: The second oil seal (11) is a rubber oil seal. The outer circle elastically abuts against the inner wall of the housing (1), and the inner circle elastically abuts against the transmission shaft (6).

5. The liquid leakage evaporation structure of a motorcycle according to claim 1, characterized in that: A slot (18) is formed on the outer wall of the housing (1). The liquid receiving groove (9) slides into or out of the slot (18) to be detachably installed at the bottom side of the housing (1).

6. The liquid leakage evaporation structure of a motorcycle according to claim 1, wherein: After the liquid receiving groove (9) is installed, at least the bottom wall or part of the side wall abuts against the housing (1).

7. The liquid leakage evaporation structure of a motorcycle according to claim 1, wherein: A liquid discharge port (17) is formed in the liquid receiving tank (9). The liquid discharge port (17) is spaced from the bottom of the liquid receiving tank (9) in height. The liquid discharge port (17) communicates downward to the outside of the liquid receiving tank (9).

8. The liquid leakage evaporation structure of a motorcycle according to claim 7, wherein: The liquid discharge port (17) is communicated to the outside of the liquid receiving tank (9) through a one-way valve structure so as to be able to discharge liquid only to the outside of the liquid receiving tank (9).

9. The liquid leakage evaporation structure of a motorcycle according to claim 1, characterized in that: After the liquid receiving tank (9) is installed on the box body (1), the top can communicate with the atmosphere.

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