Engine and motorcycle

Abstract

An embodiment of the present invention provides an engine and motorcycle, the engine comprising: an output shaft; a crankshaft located forward of the output shaft; a countershaft located above a line connecting the center of the crankshaft and the center of the output shaft; a countershaft bearing assembled within a bearing hole in an upper housing; and a bearing baffle mounted on the upper housing of the engine via baffle bolts, the bearing baffle being used to position the countershaft bearing. The lines connecting the centers of the crankshaft, the countershaft, and the output shaft form a triangle, and threaded mounting holes for the baffle bolts are arranged within the magneto cavity of the engine. This application effectively resolves the technical problem of defective positioning of the bearing baffle mounting holes, which exists in the prior art.

Description

Technical Field

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

[0002] Motorcycles are driven by electric, fuel or hybrid power. They are light, flexible and fast, so they are widely used in patrol, passenger and cargo transportation, and are also used as sports equipment.

[0003] A motorcycle engine consists of a crankshaft, countershaft, and output shaft. The countershaft bearing hole is located entirely within the upper housing, and the left countershaft bearing is installed from right to left. To ensure proper operation of the bearing, a bearing baffle is required on the right side of the bearing to limit its axial position. Specifically, the bearing baffle is bolted to the upper housing of the engine, and the threaded mounting holes must be machined from the left side of the upper housing to the right. If the bolt holes are located outside the magneto cavity, an oil plug must be separately machined and press-fitted. Otherwise, oil will leak from the threaded holes into the engine. This structure significantly increases the number of manufacturing steps required, hindering the engine's compact design. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide an engine for solving the technical problem that the position of the bearing baffle mounting hole is defective in the prior art.

[0005] To solve the above technical problems, the embodiments of the present invention adopt the following technical solutions:

[0006] An embodiment of the present invention provides an engine, comprising:

[0007] output shaft;

[0008] a crankshaft, the crankshaft being located in front of the output shaft;

[0009] a countershaft, the countershaft being located above a line connecting a center of the crankshaft and a center of the output shaft;

[0010] The countershaft bearing is assembled in the bearing hole of the upper housing;

[0011] A bearing baffle, which is mounted on the upper housing of the engine via baffle bolts, and is used to limit the position of the countershaft bearing;

[0012] The center of the crankshaft, the center of the secondary shaft and the center of the output shaft are connected to form a triangle, and the threaded mounting hole for setting the baffle bolt is arranged in the magneto cavity of the engine.

[0013] In some embodiments of the present application, the engine further comprises:

[0014] an oil pump, wherein the center of the oil pump is located rearward and downward of the center of the crankshaft;

[0015] The connecting line of the center of the oil pump and the center of the crankshaft forms a first line segment, and the angle a formed by the first line segment and the perpendicular line of the connecting surface is less than 30°.

[0016] In some embodiments of the present application, the engine further comprises:

[0017] A lower housing, on which the crankshaft and the oil pump are both arranged;

[0018] The upper box body and the lower box body are connected to form a closed box, wherein the connection surface between the upper box body and the lower box body is the closed box surface.

[0019] In some embodiments of the present application, the engine further comprises:

[0020] A bearing seat, the bearing seat is mounted on the lower box body;

[0021] A bearing is mounted on the bearing, and the crankshaft is mounted on the bearing.

[0022] In some embodiments of the present application, the engine further comprises:

[0023] A connecting piece, the lower box body and the upper box body are connected by the connecting piece, one of the connecting pieces passes through the bearing seat, and the oil pump is adjacent to the connecting piece passing through the bearing seat.

[0024] In some embodiments of the present application, the oil pump includes a suction port and a discharge port, wherein the suction port and the discharge port are located on both sides of the connecting member passing through the bearing seat.

[0025] In some embodiments of the present application, the bearing seat includes:

[0026] a right seat, the right seat being mounted on the lower box body;

[0027] An intermediate seat, the intermediate seat being mounted on the lower box body;

[0028] The bearing comprises:

[0029] a first bearing, the first bearing being mounted on the right seat, and the crankshaft being mounted on the first bearing;

[0030] A second bearing is installed on the intermediate seat, and the crankshaft is installed on the second bearing.

[0031] In some embodiments of the present application, the engine further comprises:

[0032] a filter connected to the oil pump and configured to filter the oil;

[0033] Wherein, the filter is located between the right seat and the middle seat.

[0034] In some embodiments of the present application, a main oil channel is provided directly below the crankshaft and passes through the lower case on the left and right sides. Plugs are provided at both ends of the main oil channel, and the oil pump covers the plug on the same side as it.

[0035] The present invention further provides a motorcycle, which includes the engine as described above.

[0036] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0037] An embodiment of the present invention provides an engine, comprising an output shaft; a crankshaft, the crankshaft being located in front of the output shaft; a countershaft, the countershaft being located above a line connecting the center of the crankshaft and the center of the output shaft; a countershaft bearing, mounted in a bearing hole of an upper housing; a bearing baffle, disposed on the upper housing of the engine via baffle bolts, the bearing baffle being used to limit the countershaft bearing; wherein the center of the crankshaft, the center of the countershaft, and the center of the output shaft are connected to form a triangle, and a threaded mounting hole for setting the baffle bolt is arranged in a magneto cavity of the engine. Compared to the prior art, the threaded mounting hole in the present application is arranged in the magneto cavity, and there is no need to add a separate oil plug, which reduces the processing steps of the oil plug hole and does not increase the oil plug component and press-fitting steps, thereby effectively achieving the purpose of reducing costs.

[0038] An embodiment of the present invention further provides a motorcycle, which, by adopting the engine as described above, can effectively solve the technical problem of defective setting position of the bearing baffle mounting hole existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0040] Figure 1 This is a first structural schematic diagram of an engine provided by an embodiment of the present invention;

[0041] Figure 2 is a second structural schematic diagram of an engine provided by an embodiment of the present invention;

[0042] Figure 3 is a third structural schematic diagram of an engine provided by an embodiment of the present invention;

[0043] Figure 4 is a fourth structural schematic diagram of an engine provided by an embodiment of the present invention;

[0044] Figure 5 This is a fifth structural schematic diagram of an engine provided by an embodiment of the present invention.

[0045] in:

[0046] 100, output shaft; 200, crankshaft; 300, countershaft; 310, countershaft bearing; 400, bearing baffle; 401, baffle bolt; 402, threaded mounting hole; 403, magneto cavity; 500, oil pump; 600, joint surface; 700, lower housing; 800, upper housing; 900, connector. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0049] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0050] 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.

[0051] like Figure 1-5 As shown, this embodiment provides an engine, which includes:

[0052] Output shaft 100;

[0053] A crankshaft 200 , wherein the crankshaft 200 and the output shaft 100 are arranged in front and behind each other; and

[0054] A countershaft 300 , the countershaft 300 being located above a line connecting the center of the crankshaft 200 and the center of the output shaft 100 ;

[0055] The countershaft bearing 310 is assembled in the bearing hole of the upper housing;

[0056] A bearing baffle 400 is provided on the upper housing 800 of the engine via baffle bolts 401 , and the bearing baffle 400 is used to limit the position of the countershaft bearing 310 ;

[0057] The center of the crankshaft 200, the center of the secondary shaft 300 and the center of the output shaft 100 are connected to form a triangle, and the threaded mounting hole 402 for setting the baffle bolt 401 is arranged in the magneto cavity 403 of the engine.

[0058] In existing designs, threaded mounting hole 402 is typically located outside magneto cavity 403, requiring separate machining of an oil plug and press-fitting of an oil plug. Otherwise, engine oil could leak from threaded mounting hole 402 into the engine. The present invention places threaded mounting hole 402 within magneto cavity 403. Because the magneto cover seals the hole, a separate oil plug is not required. This reduces the number of oil plug hole machining steps and eliminates the need for additional oil plug components or press-fitting steps, thereby reducing costs.

[0059] The engine of this embodiment forms a triangle by connecting the center of the countershaft 300 and the center of the output shaft 100, that is, the center of the crankshaft 200, the center of the countershaft 300 and the center of the output shaft 100 are the three vertices of the triangle, so that the countershaft 300 is not on the same straight line as the crankshaft 200 and the output shaft 100, effectively shortening the distance between the crankshaft 200 and the output shaft 100, so that the engine can reduce the width space used on the same straight line, making the engine more compact and lighter; furthermore, the crankshaft, countershaft and output shaft are arranged in a triangle, the shift assembly is located below the countershaft and the output shaft, and the lower case is designed with a through hole to avoid the shift arm when shifting, thereby reducing the lower case layout area, making the structure compact and saving space.

[0060] In the field of existing motorcycles, functional improvements have reached a certain bottleneck. The motorcycle is light and flexible, and there are certain requirements for its weight and volume space, which has led to the need for lightweight and compact motorcycles. The engine provided in this embodiment is based on this demand. The center of the crankshaft 200, the center of the countershaft 300 and the center of the output shaft 100 are connected to form a triangle, so that the engine is more compact and lighter, thereby promoting the lightweight and compactness of the motorcycle.

[0061] This embodiment provides an engine, which further includes:

[0062] an oil pump 500 , wherein the center of the oil pump 500 is located below and behind the center of the crankshaft 200 ;

[0063] The joining surface 600 , the center of the oil pump 500 and the center of the crankshaft 200 form a first line segment, and the angle a formed by the first line segment and the perpendicular line of the joining surface 600 is less than 30°.

[0064] In the engine provided by an embodiment of the present invention, the crankshaft 200 converts the forward and backward motion into rotational motion under the action of the connecting rod to provide power for the secondary shaft output of the engine. The engine is powered by the crankshaft 200, and the oil pump 500 draws the oil from the oil suction port at the bottom of the oil pan, pressurizes it, and then sends it to various parts that need lubrication through the inlet passage formed inside the crankshaft 200 box for lubrication. Since the center of the oil pump 500 in this embodiment is located at the rear and lower part of the center of the crankshaft 200, and the angle a formed by the first line segment and the perpendicular to the case surface 600 is less than 30°, the oil can be efficiently supplied to the structure of each friction pair without additionally increasing the profile of the engine. At the same time, it is ensured that the water pump can be installed in an ideal position, thereby realizing the miniaturization and lightweight of the engine, thereby effectively solving the technical problem that in the arrangement of the oil pump 500 in the related art, the oil pump 500 is arranged at the front and lower part of the crankshaft 200, which increases the profile of the engine and makes the engine non-compact.

[0065] In the existing motorcycle field, the functional improvement of motorcycles has reached a certain bottleneck. The lightness and flexibility of motorcycles also have certain requirements for their weight and volume, which has led to the demand for motorcycles to be lightweight and compact.

[0066] In motorcycles of the related art, the oil pump 500 is arranged below and behind the crankshaft 200. If the angle a between the first line segment connecting the center of the oil pump 500 and the center of the crankshaft 200 and the perpendicular line to the joint surface 600 is greater than 30 degrees, and the oil is driven by the crankshaft 200 or the countershaft, this arrangement will lengthen the inlet passage (oil channel), increase the time it takes for the oil to reach the various lubrication parts, resulting in ineffective lubrication when the engine is started, causing high friction resistance and easily causing wear of the friction pair. In this case, in order to increase the oil supply speed, a larger oil pump 500 is required. However, in this case, the larger size of the oil pump 500 will lead to an increase in the size and weight of the entire engine.

[0067] The oil pump is arranged at the front and lower part of the crankshaft 200, which will increase the engine profile and occupy the space for the water pump arrangement, occupying the position of the water pump. The engine provided in this embodiment is based on this demand. The center of the oil pump 500 in this embodiment is located at the rear and lower part of the center of the crankshaft 200, and the angle a formed by the first line segment and the perpendicular line of the case surface 600 is less than 30°. This arrangement does not lengthen the length of the inlet passage, and there is no need to replace it with a large-sized oil pump 500. It can meet the requirement of transporting oil to various lubrication parts for lubrication when the engine is started, thereby reducing the wear of the friction pairs, and at the same time making the engine more compact and lighter, thereby promoting the lightweight and compactness of the motorcycle. The position below the front of the crankshaft 200 is reserved for the installation of the water pump, and the front of the crankshaft 200 is the ideal layout position for the engine water pump. It is close to the cylinder cooling water jacket and the radiator, and the cooling water inlet and outlet channels are short, which is conducive to the miniaturization and lightweight of the engine.

[0068] In some embodiments of the present application, the engine further comprises:

[0069] A lower housing 700 , on which the crankshaft 200 and the oil pump 500 are both mounted;

[0070] The upper box body 800 and the lower box body 700 are connected to form a closed box, wherein the connection surface between the upper box body 800 and the lower box body 700 is the closed box surface 600 .

[0071] The lower case 700 and the upper case 800 are connected to form a combined case of the crankshaft 200, which can protect the crankshaft 200 and other components in the combined case. At the same time, the connecting and fitting surface of the upper case 800 and the lower case 700 is a combined case surface 600.

[0072] In some embodiments of the present application, the engine further comprises:

[0073] A bearing seat, the bearing seat is mounted on the lower box body 700;

[0074] The bearing is mounted on the bearing, and the crankshaft 200 is mounted on the bearing.

[0075] The bearing seat is mounted on the lower housing 700, and the mounting method thereof can be welding or bolting. The bearing seat has a mounting hole, and the outer ring of the bearing is inserted and mounted in the mounting hole. The crankshaft 200 is inserted and mounted on the inner ring of the bearing, so that the crankshaft 200 can rotate relative to the bearing seat. The upper housing 800 is then covered on the upper portion of the lower housing 700 to achieve the housing closing. The bearing can be a roller bearing or a ball bearing.

[0076] In some embodiments of the present application, the bearing seat includes:

[0077] A right seat, the right seat being mounted on the lower box body 700;

[0078] An intermediate seat, the intermediate seat being mounted on the lower box body 700;

[0079] The bearing comprises:

[0080] a first bearing, the first bearing being mounted on the right seat, and the crankshaft 200 being mounted on the first bearing;

[0081] A second bearing is installed on the intermediate seat, and the crankshaft 200 is installed on the second bearing.

[0082] The bearing seat may include at least a right seat and a middle seat, and may also include a left seat, so that the crankshaft 200 can be stably rotatably installed in the lower box 700, so that when the connecting rod moves back and forth, it drives the crankshaft 200, and the crankshaft 200 can stably convert the power of the back and forth movement into rotational power.

[0083] The right seat and the middle seat are both mounted on the lower case 700 by bolts, the outer ring of the first bearing is mounted on the right seat, and the right end of the crankshaft 200 is inserted and mounted on the inner ring of the first bearing; the outer ring of the second bearing is mounted on the middle seat, and the middle end of the crankshaft 200 is inserted and mounted on the inner ring of the second bearing.

[0084] In some embodiments of the present application, the engine further comprises:

[0085] Connecting piece 900, the lower box body 700 and the upper box body 800 are connected via the connecting piece 900, wherein one of the connecting pieces 900 passes through the bearing seat.

[0086] The connecting member 900 is preferably a stud or a bolt. The lower box body 700 and the upper box body 800 are fixed together by multiple bolts and can also be disassembled by bolts. Corresponding threaded holes can be pre-set on the upper box body 800 or the lower box body 700. By screwing the bolts into the threaded holes and tightening them, the lower box body 700 and the upper box body 800 are assembled together.

[0087] In some embodiments of the present application, the oil pump 500 is adjacent to the connector 900 passing through the bearing seat.

[0088] By arranging the oil pump 500 adjacent to the connector 900 passing through the bearing seat, the limited space of the engine can be reasonably utilized, thereby effectively improving the compactness and lightness of the engine.

[0089] In some embodiments of the present application, the oil pump 500 includes a suction port and a discharge port, wherein the suction port and the discharge port are located on both sides of the connecting member 900 passing through the bearing seat.

[0090] The suction port is connected to the bottom of the oil pan, and is used to draw the lubricating oil in the oil pan into the oil pump 500 when the oil pump 500 is started, and discharge it from the discharge port to various parts that need lubrication after being pressurized in the oil pump 500; wherein, the suction port and the discharge port are located on both sides of the connecting member 900 passing through the bearing seat, which can reasonably utilize the space of the engine and avoid the connecting member 900, and at the same time can make the suction port close to the oil pan and the discharge port close to the parts that need lubrication.

[0091] In some embodiments of the present application, the engine further comprises:

[0092] a filter connected to the oil pump 500 and configured to filter the oil;

[0093] Wherein, the filter is located between the right seat and the middle seat.

[0094] The oil extracted by the oil pump 500 is filtered by the filter and then discharged through the discharge port to various positions that require lubrication, thereby achieving the lubrication effect. The filter is arranged between the right seat and the middle seat, which can reasonably utilize the empty space between the right seat and the middle seat, effectively improve the compactness of the engine, and reasonably use the space of the engine.

[0095] In some embodiments of the present application, a main oil channel is provided directly below the crankshaft 200 and passes through the lower case 700 on the left and right. Plugs are provided at both ends of the main oil channel, and the oil pump 500 covers the plug on the same side.

[0096] By providing a plug in the oil pump 500, the plug can be effectively shielded by the oil pump 500. Even if the plug leaks oil, it will only leak into the oil pump 500, thus maintaining a safer and cleaner engine.

[0097] The implementation of the present invention also provides a motorcycle, which includes the engine as described above. Since the motorcycle adopts the engine as described above, it can effectively solve the technical problem of the defective setting position of the bearing baffle mounting hole in the prior art.

[0098] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An engine, characterized in that: The engine comprises: output shaft; a crankshaft, the crankshaft being located in front of the output shaft; a countershaft, the countershaft being located above a line connecting a center of the crankshaft and a center of the output shaft; The countershaft bearing is assembled in the bearing hole of the upper housing; A bearing baffle, which is mounted on the upper housing of the engine via baffle bolts, and is used to limit the position of the countershaft bearing; The center of the crankshaft, the center of the secondary shaft and the center of the output shaft are connected to form a triangle, and the threaded mounting hole for setting the baffle bolt is arranged in the magneto cavity of the engine.

2. The engine according to claim 1, characterized in that The engine further comprises: an oil pump, wherein the center of the oil pump is located below and behind the center of the crankshaft; The connecting line of the center of the oil pump and the center of the crankshaft forms a first line segment, and the angle a formed by the first line segment and the perpendicular line of the connecting surface is less than 30°.

3. The engine according to claim 2, characterized in that The engine further comprises: A lower housing, on which the crankshaft and the oil pump are both arranged; The upper box body and the lower box body are connected to form a closed box, wherein the connection surface between the upper box body and the lower box body is the closed box surface.

4. The engine according to claim 3, characterized in that The engine further comprises: A bearing seat, the bearing seat is mounted on the lower box body; A bearing is mounted on the bearing, and the crankshaft is mounted on the bearing.

5. The engine according to claim 4, characterized in that The engine further comprises: A connecting piece, the lower box body and the upper box body are connected by the connecting piece, one of the connecting pieces passes through the bearing seat, and the oil pump is adjacent to the connecting piece passing through the bearing seat.

6. The engine according to claim 5, characterized in that The oil pump comprises a suction port and a discharge port, wherein the suction port and the discharge port are located on both sides of the connecting member passing through the bearing seat.

7. The engine according to claim 4, characterized in that The bearing seat comprises: a right seat, the right seat being mounted on the lower box body; An intermediate seat, the intermediate seat being mounted on the lower box body; The bearing comprises: a first bearing, the first bearing being mounted on the right seat, and the crankshaft being mounted on the first bearing; A second bearing is installed on the intermediate seat, and the crankshaft is installed on the second bearing.

8. The engine according to claim 7, characterized in that The engine further comprises: a filter connected to the oil pump and configured to filter the oil; Wherein, the filter is located between the right seat and the middle seat.

9. The engine according to claim 3, characterized in that A main oil passage is provided directly below the crankshaft and passes through the lower case body on the left and right sides. Plugs are provided at both ends of the main oil passage, and the oil pump covers the plug on the same side as the main oil passage.

10. A motorcycle, characterized in that: The motorcycle comprises: An engine as claimed in any one of claims 1 to 9.

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