A water pump, engine and motorcycle

Abstract

The application relates to the technical field of motorcycle accessories, and discloses a water pump structure for an engine, which comprises a cover body, a shell and a water pump shaft, the shell is fixedly connected with the engine, the cover body is fixedly connected with the shell and encloses a water cavity for transmitting cooling liquid, the water pump shaft is arranged on the shell, a water seal and an impeller are arranged on the water pump shaft in the water cavity, the shell is provided with a mounting seat matched with the water seal, the bottom edge of the shell extends outward to form a boss, the boss and the engine enclose a buffer cavity, a drainage channel extending from the mounting seat to the buffer cavity is arranged in the shell, and the edge of the boss is provided with a drainage hole communicating the buffer cavity with the outside. Compared with the prior art, the water pump optimizes the existing water seal drainage structure, ensures the discharge of the cooling liquid and avoids the entry of foreign matters from the outside, and has a clever structure design and good sealing effect.

Description

Technical Field

[0001] This invention relates to the field of motorcycle parts, and in particular to a water pump, engine, and motorcycle. Background Technology

[0002] A motorcycle is a two- or three-wheeled vehicle powered by a gasoline engine and steered by handlebars. It is lightweight, agile, and fast, widely used for patrolling, passenger and freight transport, and also as sports equipment. Broadly speaking, motorcycles can be categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring motorcycles.

[0003] The cooling system, as a crucial component of a motorcycle engine, has a significant impact on the normal operation of the motorcycle. The water pump in the cooling system is usually a centrifugal water pump, which includes structures such as an impeller and a pump housing. To ensure a seal between rotating parts (such as the impeller) and stationary parts (such as the pump housing), a water seal is required to achieve a dynamic seal.

[0004] It should be noted that no matter what form of water seal is used, it cannot guarantee the long-term stability of the sealing structure. Therefore, a small amount of coolant leakage is allowed in actual use. For example, the industry standard JB / T11242-2011 specifies that the sealing performance of water seal is an average of 3ml / 100h.

[0005] To prevent minor coolant leaks from the water seal from damaging internal components such as oil seals in the water pump, a drain channel or steam channel is usually installed on the water pump to drain the coolant out of the pump. However, existing drain channels or steam channels are relatively short and directly connected to the outside environment. During use, foreign objects from the external environment can enter the water pump through the drain channel or steam channel, causing damage to the water pump. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the purpose of this invention is to provide a water pump with advantages such as ingenious structural design and good sealing effect.

[0007] Based on this, the present invention provides a water pump, which includes a cover, a housing, and a water pump shaft. The cover is fixedly connected to the housing. A water seal and an impeller are mounted on the water pump shaft. The housing is provided with a mounting seat that matches the water seal. The bottom edge of the housing extends outward to form a boss. The housing is fixedly connected to an engine. The boss and the engine enclose a buffer cavity. The housing is provided with a drainage channel extending from the mounting seat to the buffer cavity. The edge of the boss is provided with a drainage hole that connects to the outside and the buffer cavity.

[0008] In some embodiments of this application, the outlet of the drainage channel and the drainage hole are arranged alternately.

[0009] In some embodiments of this application, the bosses located around the drain hole protrude outward to form a protrusion surrounding the drain hole.

[0010] In some embodiments of this application, the buffer cavity is provided with reinforcing ribs.

[0011] In some embodiments of this application, the bottom of the housing is provided with a plurality of mounting holes for mounting bolts, the cover is provided with through holes that match the mounting holes, and at least one of the mounting holes is provided on the boss.

[0012] In some embodiments of this application, the remaining edges of the housing extend along its outer contour to form a skirt that covers the housing, and the skirt also covers the connection surface between the housing and the engine.

[0013] In some embodiments of this application, the water pump is located at the front of the right side housing of the engine.

[0014] The water pump includes a balance shaft and a pump shaft passing through the housing. A drive gear is mounted on the balance shaft, and a driven gear is mounted on the pump shaft. The drive gear and the driven gear are connected in a driving relationship.

[0015] The drive gear is located outside the driven gear. The outer diameter of the tip circle of the drive gear is smaller than the outer diameter of the journal on which the retaining ring and flat washer are mounted. The outer diameter of the tip circle of the drive gear is also smaller than the inner diameter of the driven gear.

[0016] In some embodiments of this application, the impeller inlet is provided with an external hexagonal columnar structure arranged along the pump axis, and the external hexagonal columnar structure matches the sleeve.

[0017] Another object of this application is to provide an engine characterized by employing the aforementioned water pump.

[0018] Another object of this application is to provide a motorcycle characterized by employing the aforementioned engine.

[0019] This invention provides a water pump, which has the following advantages compared to the prior art:

[0020] This invention provides a water pump comprising a cover, a housing, and a water pump shaft. The housing is fixedly connected to an engine. The cover and housing are fixedly connected and enclose a water cavity for transmitting coolant. The water pump shaft passes through the housing, and a water seal and an impeller are mounted on the water pump shaft within the water cavity. The housing has a mounting seat that matches the water seal. The bottom edge of the housing extends outward to form a boss, which, together with the engine, forms a buffer cavity. A drainage channel extending from the mounting seat to the buffer cavity is provided inside the housing. The edge of the boss has a drainage hole connecting the outside to the buffer cavity. Based on the above structure, the water pump of this application has a boss at the bottom of the housing, and the buffer cavity formed by the boss and the engine connects to and extends the drainage channel and drainage hole. Thus, the buffer cavity optimizes the existing water seal drainage structure, preventing splashed foreign objects from directly entering the water seal cavity and damaging the water pump. Furthermore, the buffer cavity itself can store a certain amount of coolant, allowing for coolant collection and preventing coolant from flowing out directly and affecting the vehicle's appearance.

[0021] The present invention also provides an engine that uses the aforementioned water pump, and therefore also has the advantages of ingenious structural design and good sealing effect.

[0022] The present invention also provides a motorcycle that uses the above-mentioned engine, and therefore also has the advantages of ingenious structural design and good sealing effect. Attached Figure Description

[0023] Figure 1 This is an exploded view of the water pump structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the water pump structure according to an embodiment of the present invention;

[0025] Figure 3 for Figure 2 Detailed drawing at point A in the diagram;

[0026] Figure 4 This is a front view of the water pump structure according to an embodiment of the present invention;

[0027] Figure 5 for Figure 4 B-B cross-section view.

[0028] In the diagram, 1 is the cover; 11 is the through hole; 2 is the shell; 21 is the boss; 211 is the buffer cavity; 212 is the drain hole; 213 is the protrusion; 214 is the reinforcing rib; 22 is the skirt; 23 is the drainage channel; 24 is the assembly hole; 3 is the pump shaft; 4 is the impeller; 5 is the water seal; and 6 is the cover bolt. Detailed Implementation

[0029] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0030] It should be understood that the terms "before," "after," etc., are used in this invention to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, "before" information can also be called "after" information, and "after" information can also be called "before" information, without departing from the scope of this invention.

[0031] like Figures 1 to 5 As shown, an embodiment of the present invention provides a water pump, which includes a cover 1, a housing 2, and a water pump shaft 3. The housing 2 is fixedly connected to an engine. The cover 1 is fixedly connected to the housing 2 and encloses a water cavity for transmitting coolant. The water pump shaft 3 passes through the housing 2. A water seal 5 and an impeller 4 are provided on the water pump shaft 3 located in the water cavity. The housing 2 is provided with a mounting seat that matches the water seal 5. The bottom edge of the housing 2 extends outward to form a boss 21. The boss 21 and the engine enclose a buffer cavity 211. The housing 2 is provided with a drainage channel 23 extending from the mounting seat to the buffer cavity 211. The edge of the boss 21 is provided with a drainage hole 212 that connects to the outside and the buffer cavity 211.

[0032] Based on the above structure, the water pump of this application has a boss 21 at the bottom of the housing 2. The buffer cavity 211 formed by the boss 21 and the engine is connected to the drainage channel 23 and the drainage hole 212, respectively. In this way, the setting of the buffer cavity 211 optimizes the existing drainage structure of the water seal 5, and prevents splashed foreign objects from directly flying into the inner cavity of the water seal 5 and damaging the water pump. Furthermore, the buffer cavity 211 itself can store a certain amount of coolant, which can collect the coolant and prevent the coolant from flowing out directly and affecting the appearance of the vehicle.

[0033] Optionally, in this embodiment of the invention, the water pump is arranged at the front of the right side housing of the engine. It includes a balance shaft and a water pump shaft passing through the housing. A drive gear is mounted on the balance shaft, and a driven gear is mounted on the water pump shaft. The drive gear and the driven gear are connected in a transmission manner. The drive gear and the driven gear are respectively mounted on the balance shaft and the water pump shaft. The water pump shaft is not coaxial with the balance shaft, allowing for flexible arrangement. The speed ratio between the water pump and the crankshaft can be set as required. Furthermore, the drive gear is located outside the driven gear. The outer diameter of the addendum circle of the drive gear is smaller than the outer diameter of the journal on which the retaining ring and flat washer are installed. The outer diameter of the addendum circle of the drive gear is also smaller than the inner diameter of the driven gear, so that the assembly and disassembly of the balance shaft and the driven gear are not affected.

[0034] Furthermore, when viewed from the impeller inlet direction along the pump axis, the impeller of this application rotates clockwise. The center of the impeller inlet is provided with an external hexagonal columnar structure arranged along the pump axis. A bolt sleeve is fitted over the external hexagonal columnar structure. The center of the bottom of the impeller is provided with a left-hand threaded bolt hole, which corresponds to the left-hand external thread on the pump shaft end.

[0035] Thus, the cylinder cooling water inlet passage adopts an internal design, with the water inlet passage set around the mounting lugs at the front of the cylinder block. The vertical water passage overlaps with the lugs, ensuring the strength of the lugs while enhancing the rigidity of the vertical water passage opening and greatly improving the sealing performance of the opening. It also eliminates the need for thick reinforcement, reducing weight. The overlapping arrangement of the vertical water passage with the lugs also provides conditions for reducing the resistance of the water passage. Specifically, the vertical water inlet passage and the water cavity wall surrounding the cylinder bore transition smoothly with tangential and guide slopes. The horizontal water passage is close to the lower part of the lugs and extends parallel to the lug mounting holes. The water passage is short and can be die-cast without machining, avoiding the risk of water seeping into the casting shrinkage cavities.

[0036] Furthermore, in some embodiments of this application, the outlet of the drainage channel 23 and the drainage hole 212 are staggered. This design can further enhance the barrier effect against foreign objects and prevent excessive accumulation of impurities in the buffer cavity 211.

[0037] Furthermore, in some embodiments of this application, the length of the drain hole 212 is increased. Obviously, increasing the length of the drain hole 212 can also increase the difficulty for foreign objects to enter the buffer cavity 211, and enhance the blocking effect of the boss 21 on external foreign objects. Similarly, in embodiments of the present invention, the boss 21 located around the drain hole 212 continues to extend outward to form a protrusion 213 surrounding the drain hole 212.

[0038] Optionally, in some embodiments of this application, a reinforcing rib 214 is provided in the buffer cavity 211. The reinforcing rib 214 can improve the structural strength of the boss 21 and ensure the normal use of the buffer cavity 211.

[0039] It should be noted that, in order to reduce the difficulty of manufacturing, the axis of the drainage channel 23 is almost perpendicular to the side of the boss 21.

[0040] In addition, in order to achieve an effective connection between the housing 2 and the cover 1, the bottom of the housing 2 is provided with a number of assembly holes 24 for setting the cover bolts 6. Correspondingly, the cover 1 is provided with through holes 11 that match the assembly holes 24. Obviously, some of the assembly holes 24 are located on the boss 21. Therefore, in order to improve the strength of the boss 21, the buffer cavity 211 also needs to be provided with reinforcing ribs 214.

[0041] For the remaining edges of the housing 2, each edge also extends along its outer contour to form a skirt 22 that covers the housing 2. Specifically, the skirt 22 extends outward to cover the connection surface between the housing 2 and the engine. Based on the above structure, the skirt 22 smoothly wraps around the complex structure of the water pump near the engine, making the water pump's appearance simpler. This design also eliminates some small and complex gaps between the housing 2 and the engine, preventing the accumulation of foreign objects here, reducing the space occupied by the water pump, and facilitating the long-term use of the water pump.

[0042] In summary, this invention provides a water pump comprising a cover, a housing, and a water pump shaft. The housing is fixedly connected to an engine. The cover and housing are fixedly connected and enclose a water cavity for transmitting coolant. The water pump shaft passes through the housing, and a water seal and an impeller are mounted on the water pump shaft within the water cavity. The housing has a mounting seat that matches the water seal. The bottom edge of the housing extends outward to form a boss, which, together with the engine, forms a buffer cavity. A drainage channel extending from the mounting seat to the buffer cavity is provided inside the housing. The edge of the boss has a drainage hole connecting the outside to the buffer cavity. Compared with the prior art, this water pump optimizes the existing water seal drainage structure, ensuring coolant discharge while preventing the entry of foreign objects. It features a clever structural design and excellent sealing performance.

[0043] The present invention also provides an engine that uses the aforementioned water pump, and therefore also has the advantages of ingenious structural design and good sealing effect.

[0044] In addition, the present invention also provides a motorcycle that uses the above-mentioned engine, and therefore also has the advantages of ingenious structural design and good sealing effect.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A water pump, characterized in that, The device includes a cover, a housing, and a water pump shaft. The cover is fixedly connected to the housing. A water seal and an impeller are mounted on the water pump shaft. The housing has a mounting seat that matches the water seal. The bottom edge of the housing extends outward to form a boss. The housing is fixedly connected to an engine. The boss and the engine enclose a buffer cavity. The housing has a drainage channel extending from the mounting seat to the buffer cavity. The edge of the boss has a drainage hole communicating with the outside and the buffer cavity. The outlet of the drainage channel and the drainage hole are staggered. The boss around the drainage hole protrudes outward to form a protrusion surrounding the drainage hole. The water pump is located at the front of the right side of the engine compartment. The water pump includes a balance shaft and a pump shaft passing through the housing. A drive gear is mounted on the balance shaft, and a driven gear is mounted on the pump shaft. The drive gear and the driven gear are connected in a driving relationship. The drive gear is located outside the driven gear. The outer diameter of the tip circle of the drive gear is smaller than the outer diameter of the journal on which the retaining ring and flat washer are mounted. The outer diameter of the tip circle of the drive gear is also smaller than the inner diameter of the driven gear.

2. The water pump according to claim 1, characterized in that, The buffer cavity is equipped with reinforcing ribs.

3. The water pump according to claim 1, characterized in that, The bottom of the housing is provided with a plurality of mounting holes for mounting bolts, and the cover is provided with through holes that match the mounting holes, and at least one of the mounting holes is provided on the boss.

4. The water pump according to claim 1, characterized in that, The remaining edges of the housing extend along its outer contour to form a skirt that covers the housing and also covers the connection surface between the housing and the engine.

5. The water pump according to claim 1, characterized in that, The impeller inlet has an external hexagonal columnar structure at its center, which is arranged along the pump axis and matches the sleeve.

6. An engine, characterized in that, Including the water pump as described in any one of claims 1-5.

7. A motorcycle, characterized in that, Including the engine as described in claim 6.

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