A water pump, engine and motorcycle

Abstract

The application relates to the technical field of motorcycle accessories, and discloses a water pump, an engine comprising the same and a motorcycle, wherein the water pump comprises a cover body and a shell, the cover body and the shell are connected into one body through connecting bolts, and the two enclose a water cavity; a water inlet communicating with the water cavity is arranged on the cover body; a water outlet communicating with the water cavity is arranged on the shell; the shell is fixedly connected with the engine through the connecting bolts; the side of the shell away from the cover body is attached to the engine; the shell and the side wall of the engine enclose an oil cavity; the water outlet of the shell and the water inlet of the engine are located on the connecting surface of the two; and the water outlet of the shell is directly connected with the water inlet of the engine in communication. Compared with the prior art, the water pump has a simple and reliable structure design, the occupied space caused by the design of the external pipeline in the prior art is reduced, and the sealing reliability between the shell and the engine is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of motorcycle accessories, in particular to a water pump, an engine and a motorcycle. Background Art

[0002] A motorcycle is a two- or three-wheeled vehicle powered by a gasoline engine and steered by handlebars. Lightweight and flexible, it offers high speed and is widely used for patrolling, transporting passengers and goods, and as a sports vehicle. Generally speaking, motorcycles can be categorized as street bikes, road racing bikes, off-road bikes, cruisers, and touring bikes. The cooling system, a crucial component of a motorcycle engine, plays a crucial role in its proper operation. It utilizes a water pump to circulate coolant through the pipes, removing heat from the engine and thus cooling it.

[0003] In the existing technology, the coolant enters the water pump and is transmitted to the engine through the water outlet pipe. This design makes the water pump structure complicated, which in turn causes the water pump to occupy a larger space. At the same time, it also puts forward high requirements for the sealing between the water pump and the water outlet pipe, which is not easy to implement. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a water pump which has the advantages of simple and reliable structure, small space occupation, and excellent sealing effect.

[0005] Based on this, the present invention provides a water pump, which includes a cover body and a shell, the cover body and the shell enclose a water cavity, the cover body is provided with a water inlet connected to the water cavity, and the shell is provided with a water outlet connected to the water cavity, the shell is fixedly connected to the engine and the side of the shell facing away from the cover body is in contact with the side wall of the engine, the shell and the side wall of the engine enclose an oil cavity, the water outlet of the shell and the water inlet of the engine are located on the connecting surface of the two, and the water outlet of the shell is connected to the water inlet of the engine.

[0006] In some embodiments of the present application, the edge of the shell extends along its outer contour to form a skirt covering the oil cavity and the water cavity.

[0007] In some embodiments of the present application, the skirt also covers the connection surface between the shell and the engine.

[0008] In some embodiments of the present application, a sealing ring is provided on the connecting surface between the housing and the engine, and the sealing ring is arranged along the projected edges of the oil cavity and the water outlet of the housing on the connecting surface.

[0009] In some embodiments of the present application, the water outlet of the shell is connected to the water cavity through a water outlet channel, and the water outlet channel is located inside the shell.

[0010] In some embodiments of the present application, a water pump shaft is arranged in the middle of the shell, two ends of the water pump shaft are located in the oil cavity and the water cavity respectively, a driven gear, a bearing seat and an impeller are arranged on the water pump shaft, the driven gear is located in the oil cavity, the bearing seat and the impeller are located in the water cavity, and the shell forms a protrusion matched with the bearing seat.

[0011] In some embodiments of the present application, reinforcing ribs are arranged on the protrusion, and a plurality of reinforcing ribs are arranged uniformly along the circumference of the protrusion.

[0012] In some embodiments of the present application, the water pump is arranged in the front part of the right engine box, the water pump comprises a balance shaft and a water pump shaft arranged on the shell, a driving gear is arranged on the balance shaft, a driven gear is arranged on the water pump shaft, the driving gear is in transmission connection with the driven gear, the driving gear is located outside the driven gear, the outer diameter of the addendum circle of the driving gear is smaller than the outer diameter of the shaft neck of the retaining ring and the flat washer, the outer diameter of the addendum circle of the driving gear is also smaller than the inner diameter of the driven gear, a drainage channel of the water pump extends from the lower part of the water seal and the oil seal space to the lower bolt side surface of the water pump, the lower part of the water pump extends outward to form a protruding part, the drainage channel is perpendicular to the side surface of the protruding part, an outer hexagonal column structure arranged along the water pump axis direction is arranged at the center of the water inlet of the impeller, the outer hexagonal column structure is matched with a sleeve, the cover is connected with the shell through three connecting bolts, and the installation direction of one of the connecting bolts is opposite to the installation direction of the remaining connecting bolts.

[0013] Another object of the present application is to provide an engine characterized by adopting the water pump.

[0014] Another object of the present application is to provide a motorcycle characterized by comprising the engine.

[0015] The embodiments of the present application provide an engine, which has the following beneficial effects compared with the prior art:

[0016] An embodiment of the present invention provides a water pump, which is used in the cooling system of an engine. The water pump includes a cover body and a shell body. The cover body and the shell body are connected as a whole by connecting bolts, and the two enclose a water cavity. The cover body is provided with a water inlet connected to the water cavity, and the shell body is provided with a water outlet connected to the water cavity. The shell body is also fixedly connected to the engine by connecting bolts. The side of the shell body facing away from the cover body is in contact with the engine. The shell body and the side wall of the engine enclose an oil cavity. The water outlet of the shell body and the water inlet of the engine are located on the connecting surface of the two. The water outlet of the shell body is directly connected to the water inlet of the engine. Based on the above structure, the water pump of the present application is directly fixed to the side wall of the engine after connecting the shell body to the cover body. The water outlet of the shell body is directly connected to the water inlet of the engine. Both are located on the connecting surface of the shell body and the engine. This design allows the coolant to enter the engine directly from the water pump, eliminating the need for additional external piping to connect the water pump and the engine. This simplifies the structure of the water pump and reduces the extra space previously occupied by the design of external piping. At the same time, the water outlet of the casing directly fits into the water inlet of the engine, making it easier for operators to seal, and the reliability of the seal between the casing and the engine is also effectively improved.

[0017] The present invention also provides an engine which adopts the above-mentioned water pump and thus has the advantages of clever structural design and small space occupation.

[0018] In addition, the present invention also provides a motorcycle, which adopts the above-mentioned engine and thus has the advantages of clever structural design and small space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the water pump structure according to an embodiment of the present invention;

[0020] Figure 2 This is a first explosion diagram of a water pump according to an embodiment of the present invention;

[0021] Figure 3 This is a second explosion diagram of a water pump according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the water pump assembly according to an embodiment of the present invention.

[0023] In the figure, 1. cover; 11. water inlet; 2. shell; 21. water outlet; 22. skirt; 23. water outlet channel; 3. water pump shaft; 4. reinforcing rib; 5. sealing ring; 6. driven gear; 7. impeller; 8. connecting bolt; 9. engine; 100. water chamber; 200. oil chamber. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] It should be understood that the present invention uses terms such as "front" and "back" to describe various types of information, but such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, "front" information could also be referred to as "back" information, and "back" information could also be referred to as "front" information without departing from the scope of the present invention.

[0026] like Figures 1 to 4 As shown, an embodiment of the present invention provides a water pump, which is used for the cooling system of an engine. Specifically, the water pump includes a cover body 1 and a shell body 2. The cover body 1 and the shell body 2 are connected as a whole by connecting bolts 8, and the two are enclosed to form a water cavity 100. The cover body 1 is provided with a water inlet 11 connected to the water cavity 100, and the shell body 2 is provided with a water outlet 21 connected to the water cavity 100. The shell body 2 is also fixedly connected to the engine 9 by connecting bolts 8. The side of the shell body 2 facing away from the cover body 1 is in contact with the engine 9. The shell body 2 and the side wall of the engine 9 enclose an oil cavity 200. The water outlet 21 of the shell body 2 and the water inlet of the engine 9 are located on the connecting surface of the two, and the water outlet 21 of the shell body 2 is directly connected to the water inlet of the engine 9.

[0027] Based on the above structure, the water pump of the present application is directly fixed to the side wall of the engine 9 after connecting the housing 2 and the cover 1. The water outlet 21 of the housing 2 is directly connected to the water inlet of the engine 9, and both are located on the connection surface between the housing 2 and the engine 9. This design allows the coolant to enter the engine 9 directly from the water pump, and there is no need to set up additional external pipes to connect the water pump and the engine 9. This simplifies the structure of the water pump and reduces the extra space occupied by the design of external pipes. At the same time, the water outlet 21 of the housing 2 is directly in contact with the water inlet of the engine 9, which is convenient for the operator to seal. The reliability of the seal between the housing 2 and the engine 9 is also effectively improved.

[0028] Optionally, the water pump of an embodiment of the present invention is arranged at the front of the right side housing of the engine, and includes a balance shaft and a water pump shaft passing through the housing. The balance shaft is equipped with a driving gear, and the water pump shaft is equipped with a driven gear. The driving gear and the driven gear are connected in a transmission manner. The driving gear and the driven gear are respectively assembled on the balance shaft and the water pump shaft. The water pump shaft is not coaxial with the balance shaft, and the arrangement is flexible. The speed ratio of the water pump to the crankshaft can be set as required. Furthermore, the driving gear is located on the outside of the driven gear, and the outer diameter of the tooth top circle of the driving gear is smaller than the outer diameter of the mounting shaft neck of the retaining ring and the flat washer. The outer diameter of the tooth top circle of the driving gear is also smaller than the inner diameter of the driven gear, so that the assembly and disassembly of the driven gear of the balance shaft is not affected.

[0029] Optionally, in some embodiments of the present application, the drainage channel of the water pump extends from the lower part of the water seal and oil seal space to the side of the lower bolt of the water pump, and the lower part of the water pump extends outward from the contour to form a protrusion, and the drainage channel is perpendicular to the side of the protrusion.

[0030] Furthermore, when observed along the pump axis from the water inlet direction of the impeller, the water pump impeller of the present application rotates clockwise, and an external hexagonal columnar structure arranged along the axis direction of the water pump is provided at the center of the impeller water inlet. The outer sleeve of the external hexagonal columnar structure is provided with a bolt sleeve, and a left-handed threaded bolt hole is provided at the bottom center of the impeller, which corresponds to the left-handed external thread at the end of the water pump shaft.

[0031] Furthermore, the cover is connected to the shell by three connecting bolts, the installation direction of one of the connecting bolts is opposite to the installation direction of the other connecting bolts, and the connecting bolt set in the opposite direction is set inside the water pump. When the water pump is installed on the engine, the connecting bolt cannot be directly observed from the outside of the engine, which is conducive to improving the aesthetics of the structure. At the same time, some of the connecting bolts set close to the outside can also be used as drain bolts of the water pump, using one bolt to achieve multiple functions.

[0032] In this way, the cylinder cooling water inlet passage adopts a built-in type, and the water inlet passage is arranged around the mounting ear at the front of the cylinder body. The vertical water passage overlaps with the ear, which ensures the strength of the ear while enhancing the rigidity of the vertical water channel mouth and greatly improving the sealing of the mouth. There is no need to add thickness reinforcement, which reduces weight; the overlapping arrangement of the vertical water channel and the ear also provides conditions for reducing the resistance of the water channel, that is, the vertical water inlet passage and the water cavity wall surrounding the cylinder hole adopt tangential and guide slopes for smooth transition; the horizontal water channel is close to the lower part of the ear and extends parallel to the ear mounting hole. The water channel is short and can be die-cast without cutting processing, avoiding the risk of water entering the casting shrinkage cavity.

[0033] Furthermore, for the shell water outlet 21 of the present application, it is connected to the water cavity 100 through the water outlet channel 23, and the water outlet channel 23 is located in the shell.

[0034] Optionally, in some embodiments of the present application, the edge of the housing 2 extends along its outer contour to form a skirt 22 that covers the oil chamber 200 and the water chamber 100. Specifically, the skirt 22 extends outward and also covers the connection surface between the housing 2 and the engine 9. Based on the above structure, the skirt 22 wraps the complex structure of the water pump near the engine 9 with a smooth structure, making the water pump look simpler; at the same time, it eliminates some small and complex gaps between the housing 2 and the engine 9, preventing foreign matter from accumulating there, which is conducive to the long-term use of the water pump; further, the provision of the skirt 22 effectively seals and isolates the oil chamber 200 and the water chamber 100, preventing leakage between the oil chamber 200 and the water chamber 100. This provision optimizes the arrangement of the oil chamber 200 and the water chamber 100, and can further reduce the volume of the water pump and reduce the space occupied by the water pump.

[0035] Optionally, in some embodiments of the present application, a sealing ring 5 is provided on the connection surface between the housing 2 and the engine 9. The sealing ring 5 is disposed along the projected edge of the oil chamber 200 and the housing's water outlet 21 on the connection surface. Obviously, the sealing ring 5 can further seal the connection surface when the housing 2 and the engine 9 are connected, particularly ensuring isolation between the oil chamber 200 and the water chamber 100, thereby preventing the lubricating oil in the oil chamber 200 from mixing with the coolant in the water chamber 100 and affecting the normal operation of the water pump.

[0036] It should be noted that in order to ensure the operation of the rotating moving parts of the water pump, it is usually necessary to provide a bearing structure on the water pump. Specifically, in the embodiment of the present invention, a water pump shaft 3 is provided in the middle of the housing 2, and the two ends of the water pump shaft 3 are respectively located in the oil chamber 200 and the water chamber 100. A driven gear 6, a bearing seat and an impeller 7 are passed through the water pump shaft 3. The driven gear 6 is located in the oil chamber 200, and the bearing seat and the impeller 7 are located in the water chamber 100. At the same time, in order to achieve the reasonable assembly of the bearing seat, the housing 2 forms a protrusion that matches the bearing seat.

[0037] Because the housing 2 is typically a thin-walled aluminum component, the existing structure of the housing 2 alone cannot guarantee support for the water pump shaft 3, the bearing seat, and other structures. Therefore, in some embodiments of the present application, reinforcing ribs 4 are provided on the raised portion. The reinforcing ribs 4 are also made of aluminum and are integrally formed with the housing 2. Obviously, to ensure effective support, multiple reinforcing ribs 4 can be provided, with each rib 4 evenly distributed along the circumference of the raised portion. The provision of the reinforcing ribs 4 effectively ensures that the housing 2 supports the bearing structure.

[0038] It should be noted that the bearing seat is located inside the housing 2, and the end of the bearing seat close to the engine 9 still does not exceed the connection surface between the housing 2 and the engine 9, that is, the entire bearing seat and the housing 2 covering the bearing seat are located outside the engine 9. Based on this structure, the operator can set the maximum size of the reinforcement rib 4 to further enhance the supporting effect of the housing 2 on the bearing structure.

[0039] Furthermore, in the present application, the contour of the oil chamber 200 is larger than the outer contour of the driven gear 6, that is, the opening of the engine 9 connection surface corresponding to the housing 2 is also larger than the outer contour of the driven gear 6. This design allows the operator to directly assemble the driven gear 6 on the water pump shaft 3. After the bearing seat and the driven gear 6 are assembled, the housing 2 and the engine 9 can be directly connected. There is no need to install the driven gear 6 in the engine 9 in advance, which makes the operation simpler and the assembly effect better.

[0040] In summary, the present invention provides a water pump, which includes a cover body and a shell, the cover body and the shell are connected as a whole by connecting bolts, the two enclose a water cavity, the cover body is provided with a water inlet connected to the water cavity, the shell is provided with a water outlet connected to the water cavity, the shell is also fixedly connected to the engine by connecting bolts, the side of the shell facing away from the cover body is in contact with the engine, the shell and the side wall of the engine enclose an oil cavity, the water outlet of the shell and the water inlet of the engine are located on the connecting surface of the two, and the water outlet of the shell is directly connected to the water inlet of the engine. Compared with the existing technology, the structural design of the water pump is simple and reliable, reducing the extra space occupied by the design of external pipelines in the past, and the reliability of the seal between the shell and the engine is also effectively improved.

[0041] In addition, the present invention also provides an engine that adopts the above-mentioned water pump, and thus also has the advantages of clever structural design and small space occupation.

[0042] In addition, the present invention also provides a motorcycle, which adopts the above-mentioned engine and thus has the advantages of clever structural design and small space occupation.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A water pump, characterized in that: The invention comprises a cover body and a shell, wherein the cover body and the shell enclose a water cavity, the cover body is provided with a water inlet communicating with the water cavity, the shell is provided with a water outlet communicating with the water cavity, the shell is fixedly connected to the engine and the side of the shell facing away from the cover body is in contact with the side wall of the engine, the shell and the side wall of the engine enclose an oil cavity, the water outlet of the shell and the water inlet of the engine are located on the connecting surface of the two, and the water outlet of the shell is connected to the water inlet of the engine; The water pump shaft comprises a water pump shaft passing through the middle of the housing, with both ends of the water pump shaft respectively located in the oil chamber and the water chamber, a driven gear, a bearing seat and an impeller passing through the water pump shaft, the driven gear being located in the oil chamber, the bearing seat and the impeller being located in the water chamber, and a raised portion being formed on the housing to match the bearing seat; The water pump is arranged at the front of the right side case of the engine. The water pump includes a balance shaft and a water pump shaft that pass through the housing. The balance shaft is equipped with a drive gear, and the water pump shaft is equipped with a driven gear. The drive gear is transmission-connected to the driven gear. The drive gear is located on the outside of the driven gear. The outer diameter of the tooth top circle of the drive gear is smaller than the outer diameter of the mounting shaft neck of the retaining ring and the flat washer. The outer diameter of the tooth top circle of the drive gear is also smaller than the inner diameter of the driven gear. The drainage channel of the water pump extends from the lower part of the water seal and oil seal space to the side of the lower bolt of the water pump. The lower part of the water pump extends outward from the contour to form a protrusion. The drainage channel is perpendicular to the side of the protrusion. An outer hexagonal columnar structure arranged along the axis of the water pump is provided at the center of the impeller water inlet. The outer hexagonal columnar structure matches the sleeve. The cover body is connected to the housing by three connecting bolts, and the installation direction of one of the connecting bolts is opposite to the installation direction of the other connecting bolts.

2. The water pump according to claim 1, characterized in that The edge of the shell extends along the outer contour of the shell to form a skirt covering the oil cavity and the water cavity.

3. The water pump according to claim 2, characterized in that The skirt also covers the connection surface between the shell and the engine.

4. The water pump according to claim 1, characterized in that A sealing ring is provided on the connection surface between the housing and the engine. The sealing ring is arranged along the projected edges of the oil cavity and the water outlet of the housing on the connection surface.

5. The water pump according to claim 1, characterized in that The water outlet of the shell is connected to the water cavity through a water outlet channel, and the water outlet channel is located in the shell.

6. The water pump according to claim 1, characterized in that The raised portion is provided with a reinforcing rib, and a plurality of the reinforcing ribs are provided. The reinforcing ribs are evenly arranged along the circumference of the raised portion.

7. An engine, characterized in that: The water pump comprises the water pump according to any one of claims 1 to 6.

8. A motorcycle, characterized in that: Comprising the engine of claim 7.

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