CN216714559U

CN216714559U - Motorcycle engine crankcase and straddle motorcycle

Info

Publication number: CN216714559U
Application number: CN202122978884.6U
Authority: CN
Inventors: 翁宝泉; 林大强; 黄宏伟
Original assignee: Xiamen Xiashing Motorcycle Co ltd
Current assignee: Xiamen Xiashing Motorcycle Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-06-10
Anticipated expiration: 2031-11-30

Abstract

The utility model relates to a motorcycle engine crankcase and a straddle motorcycle, comprising a crankcase body, a main shaft assembly and an auxiliary shaft assembly, wherein the main shaft assembly and the auxiliary shaft assembly are arranged in the crankcase body; an oil storage cavity with the horizontal height higher than that of the main shaft assembly and the auxiliary shaft assembly is arranged in the crankcase body, and the oil storage cavity is communicated with an oil pump through an oil conveying channel; the oil storage cavity is communicated with the main shaft assembly and the auxiliary shaft assembly through a side oil duct. According to the scheme, an oil storage cavity is arranged above a main shaft assembly and an auxiliary shaft assembly, engine oil is pumped into the oil storage cavity through an oil pump, and then the engine oil is conveyed to the main shaft assembly and the auxiliary shaft assembly through a side oil duct for lubrication. The engine oil stirring device has the advantages that the engine oil stirring device avoids stirring engine oil for rotating parts of the engine of the straddle motorcycle, solves the problems of horsepower loss, engine oil temperature rise and insufficient lubrication of a speed change gear set, improves the quality of the engine, and prolongs the service life of the engine.

Description

Motorcycle engine crankcase and straddle motorcycle

Technical Field

The utility model relates to the technical field of motorcycles, in particular to a motorcycle engine crankcase and a straddle motorcycle.

Background

The straddle motorcycle is deeply popular with suburb and rural users due to the characteristics of fuel saving, good trafficability, firmness, running resistance, large load, low requirement on road surface and the like. However, most straddle-type vehicles are vertical engines, and the transmission system thereof is provided with a set of transmission gears (i.e. a main and auxiliary shaft transmission gear set) for changing the torque output by the engine so as to adapt to various driving conditions (such as fast speed, slow speed, climbing, etc.). Some of the conventional lubricating methods for the speed change gear set utilize oil droplets splashed by rotation of a crankshaft member, and some of the conventional lubricating methods utilize an oil supply passage to supply oil to the speed change gear set in an injection manner. However, the two lubrication methods are limited by the small amount of splashed oil droplets and the unstable direction, and are limited by the injection direction and the injection range, so that the transmission gear set cannot be sufficiently lubricated. The crank shaft, the speed change system and other parts of the existing motorcycle are all concentrated in the crank case, and part of the parts are immersed in the engine oil, so that the engine oil is stirred during high-speed rotation to cause engine horsepower loss and engine oil temperature rise.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a crankcase for an engine of a motorcycle and a straddle type motorcycle, which solve the problems of loss of engine horsepower, increased engine oil temperature, and insufficient lubrication of a transmission gear set in the conventional motorcycle.

In one aspect, the present invention provides a motorcycle engine crankcase comprising: the main shaft assembly and the auxiliary shaft assembly are arranged in the crankcase body; an oil storage cavity with the horizontal height higher than that of the main shaft assembly and the auxiliary shaft assembly is arranged in the crankcase body, and the oil storage cavity is communicated with an oil pump through an oil conveying channel; the oil storage cavity is communicated with the main shaft assembly and the auxiliary shaft assembly through a side oil duct.

Further, the main shaft assembly comprises a main shaft and a main gear set sleeved on the main shaft; the countershaft assembly comprises a countershaft and a countershaft gear set sleeved on the countershaft.

Furthermore, central oil ducts are arranged in the main shaft and the auxiliary shaft, and the central oil ducts are communicated with the side oil ducts; the main shaft is provided with a main shaft through communicated with the central oil duct; and the auxiliary shaft is provided with an auxiliary shaft through hole communicated with the central oil duct.

Further, the oil storage cavity is arranged above the main gear set and the main gear set, and an oil injection hole facing to the preset gear is formed in the oil storage cavity.

Furthermore, an oil inlet communicated with the oil transportation channel is formed in the highest position of the oil storage cavity.

Further, an oil outlet communicated with the side oil duct is formed in the middle of the oil storage cavity at the height.

Further, the crankcase body comprises a left crankcase body, a right crankcase body and a crankcase cover which are sequentially locked together; the left box body and the right box body surround to form the oil storage cavity.

In another aspect, the utility model also provides a straddle motorcycle comprising a vertical engine including a motorcycle engine crankcase as described above.

Further, the oil storage cavity is arranged at the windward position right in front of the vertical engine.

Further, an oil pump communicated with the oil storage cavity is arranged on an engine oil pan of the vertical engine.

According to the technical scheme, the oil storage cavity is arranged above the main shaft assembly and the auxiliary shaft assembly, engine oil is pumped into the oil storage cavity through the oil pump and then is conveyed to the main shaft assembly and the auxiliary shaft assembly through the side oil duct for lubrication. The engine oil stirring device has the advantages that the engine oil stirring device avoids stirring engine oil for rotating parts of the engine of the straddle motorcycle, solves the problems of horsepower loss, engine oil temperature rise and insufficient lubrication of a speed change gear set, improves the quality of the engine, and prolongs the service life of the engine.

Drawings

FIG. 1 is a disassembled schematic view from one perspective of a crankcase of a motorcycle engine of the present invention;

FIG. 2 is a disassembled schematic view of another perspective of the crankcase of the motorcycle engine of the present invention;

FIG. 3 is a partial cross-sectional view of a main shaft portion of the crankcase of the motorcycle engine of the present invention;

fig. 4 is a partial cross-sectional view of a countershaft portion of a crankcase of a motorcycle engine of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

11. a left box body; 12. a right box body; 13. a crankcase cover; 2. an oil storage chamber; 3. an oil delivery passage; 4. a side oil duct; 5. a main shaft; 51. a main shaft through hole; 52. a main gear set; 6. a counter shaft; 61. a countershaft through hole; 62. and a secondary gear set.

Detailed Description

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is apparent that the specific details set forth in the following description are merely exemplary of the utility model, which can be practiced in many other embodiments that depart from the specific details disclosed herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

In one embodiment, referring to fig. 1-4, in one aspect, the present invention provides a crankcase of a motorcycle engine, comprising: the main shaft assembly and the auxiliary shaft assembly are arranged in the crankcase body; an oil storage cavity 2 with the horizontal height higher than that of the main shaft assembly and the auxiliary shaft assembly is arranged in the crankcase body, and the oil storage cavity 2 is communicated with an oil pump through an oil conveying channel 3; the oil storage cavity 2 is communicated to the main shaft assembly and the auxiliary shaft assembly through a side oil passage 4.

According to the technical scheme, an oil storage cavity 2 is arranged above a main shaft assembly and an auxiliary shaft assembly, engine oil is pumped into the oil storage cavity 2 through an oil pump and then is conveyed to the main shaft assembly and the auxiliary shaft assembly through a side oil duct 4 for lubrication. The engine oil stirring device has the advantages that the engine oil stirring device avoids stirring engine oil for rotating parts of the engine of the straddle motorcycle, solves the problems of horsepower loss, engine oil temperature rise and insufficient lubrication of a speed change gear set, improves the quality of the engine, and prolongs the service life of the engine.

Specifically, the crankcase body includes a left case body 11, a right case body 12, and a crankcase cover 13, which are sequentially locked together; the left box body 11 and the right box body 12 surround to form an oil storage cavity 2.

On the basis of the present embodiment, specifically, the spindle assembly includes a spindle 5 and a main gear set 52 sleeved on the spindle 5; the countershaft assembly includes a countershaft 6 and a countershaft gearset 62 journaled on the countershaft 6.

Furthermore, a central oil duct is arranged in the main shaft 5 and the auxiliary shaft 6, and the central oil duct is communicated with the side oil duct 4; a main shaft through hole 51 communicated with the central oil passage is formed in the main shaft 5; the counter shaft 6 is provided with a counter shaft through hole 61 communicated with the center oil passage.

It can be understood that, with the above structure, the engine oil stored in the oil storage chamber 2 can enter the central oil ducts of the main shaft 5 and the auxiliary shaft 6 through the two side oil ducts 4, respectively, and lubricate the speed change gear set through the through holes arranged on the surfaces of the main shaft 5 and the auxiliary shaft 6.

In addition to the present embodiment, the oil storage chamber 2 is disposed above the main gear set 52 and the main gear set 52, and an oil injection hole facing a predetermined gear is disposed on the oil storage chamber 2.

With the above structure, the gears on the main gear group 52 and the sub gear group 62 are lubricated at precise points. When the lubricating oil injection hole is used, which gear needs to be lubricated can be increased by increasing the oil injection hole to lubricate the gear independently.

In this embodiment, the highest position of the oil storage cavity 2 is provided with an oil inlet communicated with the oil transportation channel 3. This ensures that the oil reservoir 2 always stores oil therein.

Specifically, an oil outlet communicated with the side oil passage 4 is arranged at the middle height position of the oil storage cavity 2. This ensures that the main gear set 52 and the sub-gear set 62 can be lubricated quickly by the oil in the oil reservoir chamber 2, and the oil reservoir chamber can also store the oil.

It should be noted that, of course, the oil inlet and the oil outlet of the oil storage chamber 2 may be disposed at other positions, which is not described as a limitation in the present embodiment.

In another aspect, the utility model also provides a straddle motorcycle, which comprises a vertical engine, wherein the vertical engine comprises the motorcycle engine crankcase.

On the basis of the embodiment of the utility model, the oil storage cavity 2 is arranged at the windward position right in front of the vertical engine. When the motorcycle runs, the engine oil in the oil storage cavity 2 can be cooled by the oncoming airflow, so that the temperature of the engine oil is reduced.

Specifically, the oil pump that communicates with the oil reservoir 2 is provided on an engine oil pan of the vertical engine.

The utility model has the beneficial effects that: through set up large capacity oil storage chamber 2 in the crankcase body, send the machine oil of engine oil pan to the storage chamber 2 and store to this engine oil liquid level of reduction engine oil pan by a wide margin reduces the stirring of rotary parts such as engine crankshaft to machine oil, reduces engine horsepower loss and machine oil temperature. Through setting up side oil duct 4 in the crankcase body, draw the machine oil in the oil storage chamber 2 to main and auxiliary shaft department, the accurate main and auxiliary shaft speed gearset is lubricated.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, various changes, substitutions and alterations can be made without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present invention should be subject to the claims.

Claims

1. A motorcycle engine crankcase, comprising: the main shaft assembly and the auxiliary shaft assembly are arranged in the crankcase body; an oil storage cavity with the horizontal height higher than that of the main shaft assembly and the auxiliary shaft assembly is arranged in the crankcase body, and the oil storage cavity is communicated with an oil pump through an oil conveying channel; the oil storage cavity is communicated with the main shaft assembly and the auxiliary shaft assembly through a side oil duct.

2. A motorcycle engine crankcase according to claim 1, wherein the main shaft assembly includes a main shaft and a main gear set sleeved on the main shaft; the countershaft assembly comprises a countershaft and a countershaft gear set sleeved on the countershaft.

3. A motorcycle engine crankcase according to claim 2, wherein a central oil passage is provided in both the main shaft and the auxiliary shaft, the central oil passage being in communication with the side oil passages; a main shaft through hole communicated with the central oil duct is formed in the main shaft; and the auxiliary shaft is provided with an auxiliary shaft through hole communicated with the central oil duct.

4. A motorcycle engine crankcase according to claim 2, wherein the oil reservoir chamber is provided above the main gear set and the main gear set, and an oil jet hole directed toward a predetermined gear is provided in the oil reservoir chamber.

5. A motorcycle engine crankcase according to claim 1, wherein the highest position of the oil storage chamber is provided with an oil inlet communicated with the oil delivery passage.

6. A motorcycle engine crankcase according to claim 1, wherein an oil outlet communicating with the side oil passage is provided at a position at an intermediate height of the oil storage chamber.

7. A motorcycle engine crankcase according to claim 1, wherein the crankcase body includes a left case body, a right case body, and a crankcase cover that are sequentially locked together; the left box body and the right box body surround to form the oil storage cavity.

8. A straddle-type motorcycle comprising a vertical engine including a motorcycle engine crankcase according to any one of claims 1 to 7.

9. The straddle motorcycle of claim 8, wherein the oil reservoir chamber is disposed at a windward position directly in front of the vertical engine.

10. The straddle motorcycle of claim 8, wherein an oil pump communicating with the oil reservoir chamber is provided on an engine oil pan of the vertical engine.