Water pump for cooling a motorcycle engine

Abstract

A water pump for cooling motorcycle engine belongs to the technical field of motorcycles. The water pump body and the water pump cover form a water cavity, which is divided into an inlet water cavity and an outlet water cavity. The radiator backwater connector and the small circulation backwater connector are evenly installed on the water pump cover and constitute inlet water port one and inlet water port two of the inlet water cavity. An outlet water port is arranged on the water pump cover. The pump shaft is rotatably installed in the water pump body through a bearing. The impeller is arranged in the water cavity and is installed on the pump shaft. The structure of the water pump is more compact. The recess structure is adopted for the driving position of the water pump shaft. Compared with the structure of the external convex driving, the size of the water pump is smaller. The water drain hole is integrated with the threaded hole of the water pump body and the water pump cover, which reduces the use of water drain bolt parts, reduces the cost of parts and assembly. The water pump has two inlet holes, which can realize the circulation of the cooling liquid of two cooling pipelines and improve the circulation efficiency.

Description

Technical Field

[0001] This invention belongs to the field of motorcycle technology, specifically relating to a water pump for cooling motorcycle engines. Background Technology

[0002] With the rapid development of the motorcycle industry, motorcycle performance is moving towards greater safety, reliability, energy efficiency, and environmental friendliness. Water pumps are widely used in motorcycle cooling systems and can well meet market demands.

[0003] Due to the highly compact structure of motorcycle engines, strict dimensional constraints are imposed on all accessories, including the water pump, within a limited space. Furthermore, the orientation of the water pump inlet is often strictly limited to meet the optimal layout of the vehicle and the cooling pipes. Therefore, how to rationally design the water pump structure and properly determine the inlet orientation within extremely limited space, so that it meets performance requirements and adapts to the overall engine layout, has become a key and challenging technical problem in water pump structure design. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a water pump for cooling a motorcycle engine.

[0005] The technical solution adopted in this invention is:

[0006] A water pump for cooling a motorcycle engine includes a pump body, a pump cover, a radiator return water pipe, a small circulation return water pipe, an impeller, a pump shaft, and bearings. The pump body and the pump cover form a water cavity, which is divided into an inlet cavity and an outlet cavity. The radiator return water pipe and the small circulation return water pipe are press-fitted onto the pump cover and form an inlet 1 and an inlet 2 of the inlet cavity. An outlet is provided on the pump cover. The pump shaft is rotatably mounted in the pump body through the bearings. The impeller is disposed in the water cavity and mounted on the pump shaft.

[0007] Furthermore, a coolant drain port communicating with the water cavity is provided on the outer surface of the water pump cover, and the coolant drain port is sealed with a sealing gasket and fastening bolts.

[0008] Furthermore, the axial direction of the inlet is set at an angle to the axial direction of the outlet.

[0009] Furthermore, the water inlet is oriented in the direction of the bearing.

[0010] Furthermore, the pump cover is provided with an auxiliary support plane for the press-fitted radiator return water pipe, and the auxiliary support plane is parallel to the outer circumferential surface of the inlet of the radiator return water pipe.

[0011] Furthermore, an auxiliary support plane two for press-fitted small circulation return water pipe is provided on the outside of the water pump cover.

[0012] Furthermore, a water seal, an oil seal, and two bearings are provided between the pump shaft and the pump body.

[0013] Furthermore, the impeller has a balancing hole on its bottom surface.

[0014] Furthermore, the water pump body is provided with a drip hole and an oil inlet hole.

[0015] Furthermore, the pump shaft drive section uses a groove structure.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The present invention has a more compact structure, and the water pump shaft drive position adopts a groove structure. Compared with the structure of outward drive, the present invention has a smaller external size.

[0018] 2. This invention provides a water pump that is easy to assemble and maintain.

[0019] 3. This invention adopts an integrated design of drain hole and threaded hole connecting water pump body and water pump cover, reducing the use of drain bolt parts and reducing parts cost and assembly cost.

[0020] 4. This invention has two water inlets, which can realize the circulation of coolant in two cooling pipes and improve circulation efficiency.

[0021] 5. The water inlet of this invention adopts a press-fit pipe method, which can realize the connection of cooling pipes in different directions, and facilitates the overall layout of the engine.

[0022] 6. The auxiliary support plane of the press-fit radiator return water pipe of the present invention is set inside the water pump cover, eliminating the risk of pressure damage to the outer surface of the water pump cover. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0024] Figure 2 This is a main sectional view of the present invention;

[0025] Figure 3 This is a schematic diagram of the water cavity of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the water pump cover of the present invention. Figure 1 ;

[0028] Figure 6 This is a schematic diagram of the water pump cover of the present invention. Figure 2 ;

[0029] The components include: 1. Pump body; 2. Pump cover; 3. Radiator return water pipe; 4. Small circulation return water pipe; 5. Positioning pin; 6. Impeller; 7. Pump shaft; 8. Water seal; 9. Oil seal; 10. Bearing; 11. O-ring seal; 12. Sealing gasket; 13. Fastening bolt; 101. Water inlet chamber; 102. Water outlet chamber; 201. Oil inlet hole; 301. Drip hole; 401. Auxiliary support plane one; 501. Coolant drain port; 601. Water inlet one; 602. Water inlet two; 603. Water outlet; 701. Auxiliary support plane two; 801. Balance hole; 901. Groove structure. Detailed Implementation

[0031] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0032] like Figures 1-6 As shown, a water pump for cooling a motorcycle engine includes a water pump body 1, a water pump cover 2, a radiator return water pipe 3, a small circulation return water pipe 4, a positioning pin 5, an impeller 6, a pump shaft 7, a water seal 8, an oil seal 9, a bearing 10, an O-ring seal 11, a gasket 12, and fastening bolts 13.

[0033] The water pump is driven by the engine, which in turn drives the impeller 6 to rotate. The centrifugal force generated by the impeller throws the coolant out. The water pump body 1 and the water pump cover 2 are connected by fastening bolts 13 and positioned by locating pins 5. The water pump body 1 and the water pump cover 2 form a water cavity, which is divided into an inlet cavity 101 and an outlet cavity 102. The inlet cavity 101 has two inlets, 601 and 602, which can realize the circulation of coolant in two cooling pipes and improve circulation efficiency. Inlet 601 and inlet 602 are composed of the radiator return water pipe 3, the small circulation return water pipe 4 and the water pump cover 2. The radiator return water pipe 3 is press-fitted onto the water pump cover 2, and the water pump cover 2 has an auxiliary support plane 401 inside for pressing the radiator return water pipe 3. The auxiliary support plane 401 and the radiator return water pipe are connected to each other. The outer circumferential surface of the inlet 601 of the radiator return water pipe 3 is parallel. The axis of the inlet 601 formed by the radiator return water pipe 3 is at a certain angle to the axis of the outlet 603. This is to allow for the subsequent installation of the engine cooling circuit hose on the radiator return water pipe 3 and the outlet 603. The outlet 603 is located on the water pump cover 2. The small circulation return water pipe 4 is press-fitted onto the water pump cover 2, and the outside of the water pump cover 2 is provided with an auxiliary support plane 701 for pressing the small circulation return water pipe 4. The direction of the inlet 602 formed by the small circulation return water pipe 4 is in the direction of the bearing 10. The coolant drain port 501, which communicates with the water cavity, is provided on the outer surface of the water pump cover 2. The coolant drain port 501 is sealed with a sealing gasket 12 and a fastening bolt 13. The fastening bolt 13 connects the water pump body 1 and the water pump cover 2. The positioning pin 5 is gap-connected with the water pump body 1 and the water pump cover 2, and the positioning positions of the water pump body 1 and the water pump cover 2 are accurate. O-ring 11 is installed on the water pump body 1 to seal the connection between the water pump body 1 and the water pump cover 2. The water pump uses two bearings 10 to ensure the stability of the pump shaft 7 during rotation. The outer ring of the bearing 10 is interference-fitted with the water pump body 1, and the inner ring of the bearing 10 is clearance-fitted with the pump shaft 7. The outer ring of the oil seal 9 is interference-fitted with the water pump body 1, and the inner ring of the oil seal 9 is interference-fitted with the pump shaft 7 to prevent engine oil leakage. The outer ring of the water seal 8 is interference-fitted with the water pump body 1, and the inner ring of the water seal 8 is interference-fitted with the pump shaft 7 to prevent coolant leakage from the water chamber. The impeller 6 is threaded to the pump shaft 7 and is housed inside the water chamber. The impeller 6 has a balance hole 801 on its bottom surface to ensure that the coolant pressure in the water chamber is equal to the coolant pressure at the bottom of the impeller 6 during water pump operation, eliminating axial force and extending the life of the bearing 10. The pump body 1 is equipped with a drip hole 301 to ensure that leaked water vapor at the water seal 8 is discharged in a timely manner, thereby extending the service life of the pump shaft 7. The pump body 1 is also equipped with an oil inlet hole 201 to ensure the lubrication of the oil seal 9 and the bearing 10. The drive section of the pump shaft 7 uses a groove structure 901 to reduce the overall size of the pump and make the structure more compact.

[0034] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A water pump for cooling a motorcycle engine, characterized in that: The pump includes a pump body (1), a pump cover (2), a radiator return water pipe (3), a small circulation return water pipe (4), an impeller (6), a pump shaft (7), and a bearing (10). The pump body (1) and the pump cover (2) form a water cavity, which is divided into an inlet cavity (101) and an outlet cavity (102). The radiator return water pipe (3) and the small circulation return water pipe (4) are press-fitted onto the pump cover (2) and form the inlet one (601) and inlet two (602) of the inlet cavity (101). The pump cover (2) is provided with an outlet (603). The pump shaft (7) is rotatably installed in the pump body (1) through the bearing (10). The impeller (6) is set in the water cavity and installed on the pump shaft (7).

2. A water pump for cooling a motorcycle engine according to claim 1, characterized in that: The water pump cover (2) has a coolant drain port (501) connected to the water chamber on its outer surface. The coolant drain port (501) is sealed with a sealing gasket (12) and a fastening bolt (13).

3. A water pump for cooling a motorcycle engine according to claim 1, characterized in that: The axial direction of the inlet (601) is set at an angle to the axial direction of the outlet (603).

4. A water pump for cooling a motorcycle engine according to claim 3, characterized in that: The direction of the second water inlet (602) is in the direction of the bearing (10).

5. A water pump for cooling a motorcycle engine according to claim 1, characterized in that: The pump cover (2) is provided with an auxiliary support plane (401) for the press-fit radiator return water pipe (3), and the auxiliary support plane (401) is parallel to the outer circumferential surface of the inlet (601) of the radiator return water pipe (3).

6. A water pump for cooling a motorcycle engine according to claim 5, characterized in that: The pump cover (2) is provided with an auxiliary support plane (701) for the press-fitted small circulation return water pipe (4).

7. A water pump for cooling a motorcycle engine according to claim 1, characterized in that: A water seal (8), an oil seal (9), and two bearings (10) are provided between the pump shaft (7) and the pump body (1).

8. A water pump for cooling a motorcycle engine according to claim 1, characterized in that: The impeller (6) has a balance hole (801) on its bottom surface.

9. A water pump for cooling a motorcycle engine according to claim 1, characterized in that: The pump body (1) is provided with a drip hole (301) and an oil inlet hole (201).

10. A water pump for cooling a motorcycle engine according to claim 1, characterized in that: The pump shaft (7) drive section uses a groove structure (901).

Images