An engine
By designing the give way groove and stagnant groove structure on the motorcycle engine case, the stability problem of the engine case under pulse impact is solved, the strength of the starter and the effective discharge and heat dissipation of rainwater are achieved, ensuring that the engine is in Stable operation under various conditions.
Patent Information
- Application Number
- CN202110494458.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-05-07
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2041-05-07
AI Technical Summary
During driving, the motorcycle engine case is subjected to pulse impact from the crankshaft and the balance shaft, resulting in unstable engine operation, and the prior art is difficult to effectively prevent the starter from being disengaged and bumped.
An engine case is designed, by providing a protruding mounting part on the outside side wall of the crankshaft chamber and forming a give way groove with the outside side wall of the gear chamber and the reinforcement plate, a protective case is formed when installing the starter, which enhances the connection strength, and Water leakage holes and ribs are provided on the bottom surface of the groove to prevent soaking, and at the same time, the bus section and stagnant tank are used to achieve rapid discharge and heat dissipation of rainwater.
It improves the working stability of the engine, prevents the starter from disengaging and bumping, ensures the engine to operate efficiently and stably under various weather conditions, and avoids problems caused by immersion and rust.
Smart Images
Figure CN113062814B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of engines and relates to an engine. Background Art
[0002] The motorcycle engine case is used to accommodate components such as the crankshaft, balance shaft and transmission assembly. It is also the installation platform for external components such as the starter. Most of them are cast in cast iron. During the driving process of the motorcycle, the case will be continuously subjected to pulse impacts from the internal crankshaft and balance shaft. The quality level of the case is closely related to the working stability of the engine.
[0003] A Chinese patent with publication number CN206092205U discloses a crankcase of a motorcycle engine, wherein the crankcase is provided with a bearing mounting hole, a balance shaft in the motorcycle engine is built into the crankcase and extends into the bearing mounting hole, a bearing sleeve in the motorcycle engine is arranged at the balance shaft and assembled in the bearing mounting hole, a diameter of the bearing mounting hole is 42 mm, a depth of the bearing mounting hole is 13 mm, and a size of the bearing matches a size of the bearing mounting hole.
[0004] The above-mentioned box structure can make the internal bearing work more smoothly, but the external starter components are easily interfered with, resulting in dislocation and failure, affecting the working stability of the engine. To solve the above problems, ordinary technicians in this field can easily consider: 1. Increase the connection strength of the external starter to prevent it from displacement; 2. Set a protective cover for the external starter to reduce the impact of bumps. Summary of the invention
[0005] The present invention aims at the above-mentioned problems existing in the prior art and provides an engine. The technical problem to be solved by the present invention is: how to improve the working stability of the engine.
[0006] The purpose of the present invention can be achieved by the following technical solutions:
[0007] An engine comprises a casing, wherein the casing has a gear chamber and a crank chamber, and is characterized in that the outer wall of the crank chamber has a mounting portion for the drive shaft of the starter to pass through, the mounting portion protrudes toward the side where the gear chamber is located, the outer end of the mounting portion is fixedly connected to the outer wall of the gear chamber by a reinforcing plate, and the outer wall of the crank chamber, the outer wall of the gear chamber, the mounting portion and the reinforcing plate together form a clearance groove for installing the starter.
[0008] The housing is the shell part of the engine. The gear chamber is used to accommodate the transmission assembly. The crankshaft chamber is used to accommodate and install the engine's crankshaft, balance shaft and other components. The starter is installed on the outside of the housing. The starter's drive shaft is rotatably connected to the crankshaft through a one-way transmission device. When the engine needs to be started, the starter can be controlled to energize and drive the crankshaft to rotate, thereby driving the piston stroke movement to facilitate the ignition operation. By providing a mounting portion protruding toward the side where the gear chamber is located on the outer wall of the crankshaft chamber, the mounting portion is a mounting platform for the starter, through which the drive shaft of the starter can pass, thereby driving the gear arranged in the mounting portion, and finally driving the crankshaft to move. At the same time, the outer end of the mounting portion is fixedly connected to the outer wall of the gear chamber by a reinforcing plate. The outer wall of the crankshaft chamber, the mounting portion of the outer wall of the gear chamber and the reinforcing plate form a clearance groove, which can fix the starter in the clearance groove. In this way, the outer wall of the case can form a protective shell to protect the starter in the circumference while the starter is installed, thereby reducing the probability of the starter being bumped to ensure stable operation of the engine. The reinforcing plate fills the space between the mounting portion and the outer wall of the gear chamber, so that a structural closed loop is formed in the circumference of the clearance groove, thereby improving the strength of the starter connection area and ensuring the stability of the engine operation.
[0009] In the above engine, the opening of the give way groove is arranged upward, the bottom surface of the give way groove has a water leakage hole arranged downward and connected to the outside world, and the junction of the bottom surface of the give way groove and the circumferential side wall of the give way groove has a plurality of ribs arranged in the vertical direction. The give way groove is arranged with the opening upward, and the water leakage hole arranged downward and connected to the outside world is arranged on the bottom surface of the give way groove, so that rainwater can flow to the outside world from the water leakage hole after falling into the give way groove, thereby avoiding soaking of the starter and causing work failure, thereby improving the working stability, and a plurality of vertically extending ribs are arranged at the junction of the bottom surface of the give way groove and the circumferential side wall of the give way groove, and the ribs in the vertical direction can strengthen the inner side wall of the give way groove, further ensuring the stability of the structure.
[0010] In the above-mentioned engine, the bottom surface of the give way groove has a downwardly concave and strip-shaped confluence section, the leakage hole is located on the confluence section, the lower edges of several ribs are engaged with the surface of the confluence section, and several ribs are arranged at intervals along the length direction of the confluence section and divide the confluence section into several water retention troughs. A strip-shaped confluence section that is concave downward is provided at a lower position on the bottom surface of the yield groove, so that the upper end of the leakage hole is located on the confluence section, and the lower side edge of the rib plate is engaged with the surface of the confluence section, and a plurality of rib plates are arranged at intervals along the length direction of the confluence section and divide the confluence section into a plurality of water retention grooves, so that rainwater entering the yield groove will preferentially flow into the confluence section under the action of gravity, and thus be quickly discharged from the leakage hole; and the rib plate divides the confluence section into a plurality of water retention grooves, so that part of the rainwater can be retained in the water retention groove in rainy weather, and can continuously provide heat dissipation for the box body through heat absorption and evaporation during the operation of the engine, which is conducive to more efficient and stable operation of the engine, and when the motorcycle is stored in the garage, the rainwater in the water retention groove can be evaporated by relying on the residual temperature of the engine box body, so as to avoid rust caused by accumulation and ensure stable operation.
[0011] In the above engine, the surface of the converging section is in the shape of a concave arc, and the edge of the converging section is processed by smooth transition. By setting the surface of the converging section in the shape of a concave arc and making the side of the converging section transition smoothly, rainwater can smoothly enter the converging section while avoiding stress concentration at the edge structure of the converging section, so that the structure is stable.
[0012] In the above-mentioned engine, the bottom surface of the clearance groove also has a limiting boss protruding upward. When the starter is installed in the clearance groove, the limiting boss is vertically opposite to the lowest point of the starter. The limiting boss is located between two adjacent ribs along the length direction of the confluence section, and the top position of the limiting boss is higher than the lowest position of the upper edge of the rib. By arranging an upwardly protruding limiting boss on the bottom surface of the yielding groove, the limiting boss is vertically opposite to the lowest point of the starter after the starter is installed, so that the limiting boss can limit the lowest position of the starter, which is beneficial to ensure the safe and accurate installation position of the starter. In addition, after the liquid level of rainwater in the water retention tank rises, it will flow out from the lowest position of the upper edge of the rib plate, so that the limiting boss is located between two adjacent rib plates along the length direction of the confluence section, and the top position of the limiting boss is higher than the lowest position of the upper edge of the rib plate, which can avoid the limiting boss affecting the maximum water level of the water retention tank, and is beneficial to ensure that rainwater will not continue to soak the starter, thereby improving working stability.
[0013] In the above engine, the crankshaft chamber and the gear chamber are sequentially arranged along the front-to-back direction of the engine, the engine includes a cylinder body arranged above the box body, the cylinder body has a plurality of cylinder barrels arranged along the left-right direction, and the clearance groove is directly opposite to the lower ends of the plurality of cylinder barrels along the front-to-back direction. By arranging the crankshaft chamber and the gear chamber sequentially along the front-to-back direction of the engine, and the engine includes a cylinder body arranged above the box body, so that the clearance groove is directly opposite to the lower ends of the cylinder barrels along the front-to-back direction, rainwater entering the clearance groove can more directly dissipate heat to the areas where the lower ends of the plurality of cylinder barrels are located at the same time, thereby improving the heat dissipation effect.
[0014] In the above engine, the confluence section is arranged along the left-right direction of the engine, and the length of the confluence section is adapted to the left-right dimension of the cylinder body. By arranging the confluence section along the left-right direction of the engine, and the length of the confluence section is adapted to the left-right dimension of the cylinder body, it is further ensured that the rainwater in each water retention tank can more evenly absorb the heat transferred by each cylinder body, and ensure uniform and stable cooling.
[0015] In the above engine, the leakage hole is located at the edge of the bottom surface of the clearance groove, and the lower end of the leakage hole is located on the outer surface of the box body below the mounting portion. By arranging the leakage hole at the edge of the bottom surface of the clearance groove, the lower end of the leakage hole is located on the outer surface of the box body below the mounting portion, which is conducive to shortening the length of the leakage hole, minimizing its impact on the structural strength and heat dissipation effect of the engine, and ensuring smooth water flow.
[0016] In the above engine, the bottom of the clearance groove has a plurality of mounting columns for mounting the starter, and the mounting columns are arranged in the up-down direction. By arranging the mounting columns arranged in the up-down direction at the bottom of the clearance groove, the other end of the starter can be fixedly connected to the mounting columns, thus ensuring that the forces at both ends of the starter are balanced, which is conducive to ensuring the stability of the mounting structure.
[0017] In the above engine, the top joint surface of the box is parallel to the bottom joint surface of the box. By making the top joint surface of the box parallel to the bottom joint surface of the box, it is convenient to perform casting processing, save production costs and help ensure the stability of the connection.
[0018] Compared with the prior art, the advantages of the present invention are as follows:
[0019] The engine forms a clearance groove by arranging a mounting portion, a reinforcing plate, an outer side wall of the crankshaft chamber and an outer side wall of the gear chamber, so that one end of the starter located in the clearance groove is connected to the mounting portion. In this way, the inner side wall of the clearance groove can form a protective shell for protecting the starter in the circumference while the starter is installed. The protective effect is excellent, and no additional accessories are required. The probability of the starter being bumped is reduced to ensure stable operation of the engine. In addition, the mounting portion and the outer side wall of the gear chamber are fixedly connected by a reinforcing plate, and the reinforcing plate fills the space between the mounting portion and the outer side wall of the gear chamber, so that a structural closed loop is formed in the circumference of the clearance groove, thereby improving the strength of the starter connection area and ensuring the stability of engine operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the engine in this embodiment.
[0021] Figure 2 It is a three-dimensional structural schematic diagram of the housing and the starter in this embodiment.
[0022] Figure 3 2 is a schematic diagram of the three-dimensional structure of the box body in this embodiment.
[0023] Figure 4 It is a three-dimensional structural schematic diagram of the housing and the starter from another angle in this embodiment.
[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the housing and the starter in this embodiment.
[0025] Figure 6 Yes Yes Figure 5 Enlarged view of part A in .
[0026] Figure 7 It is a schematic diagram of the three-dimensional exploded structure of the engine in this embodiment.
[0027] Figure 8 1 is a schematic diagram of the three-dimensional structure of the housing and the starter at an oblique angle in this embodiment.
[0028] In the figure, 1, housing; 11, gear chamber; 12, crankshaft chamber; 13, mounting portion; 14, reinforcement plate;
[0029] 2. Starter;
[0030] 3. Make way groove; 31. Leakage hole; 32. Rib plate; 33. Converging section; 34. Water retention groove; 35. Limiting boss; 36. Mounting column;
[0031] 4. Cylinder body; 41. Cylinder barrel. DETAILED DESCRIPTION
[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0033] like Figure 1-8As shown, the engine includes a housing 1, which has a gear chamber 11 and a crank chamber 12. The outer wall of the crank chamber 12 has a mounting portion 13 protruding toward the side where the gear chamber 11 is located. One end of the starter 2 can be connected to the mounting portion 13. The outer end of the mounting portion 13 is fixedly connected to the outer wall of the gear chamber 11 through a reinforcing plate 14. The outer wall of the crank chamber 12, the outer wall of the gear chamber 11, the mounting portion 13 and the reinforcing plate 14 together form a recess 3 for accommodating and installing the starter 2. The housing 1 belongs to the shell part of the engine. The gear chamber 11 is used to accommodate the transmission assembly. The crank chamber 12 is used to accommodate and install the crankshaft and balance shaft of the engine. The starter 2 is installed outside the housing 1. The drive shaft of the starter 2 is rotatably connected to the crankshaft through a one-way transmission device. When the engine needs to be started, the starter 2 can be controlled to be energized to drive the crankshaft to rotate, thereby driving the piston stroke movement to facilitate the ignition operation. By setting a clearance groove 3 on the outer wall of the case 1 between the gear chamber 11 and the crank chamber 12, and setting a mounting portion 13 protruding toward the gear chamber 11 on the outer wall of the crank chamber 12, one end of the starter 2 located in the clearance groove 3 can be connected to the mounting portion 13. The clearance groove 3 is formed by the outer wall of the crank chamber 12, the outer wall of the gear chamber 11, the mounting portion 13 and the reinforcing plate 14. In this way, the outer wall of the case 1 can form a protective shell to protect the starter 2 in the circumferential direction while the starter 2 is installed, reducing the probability of the starter 2 being bumped to ensure stable operation of the engine. In addition, the mounting portion 13 is fixedly connected to the outer wall of the gear chamber 11 by the reinforcing plate 14, and the reinforcing plate 14 fills the space between the mounting portion 13 and the outer wall of the gear chamber 11, so that the circumference of the clearance groove 3 forms a structural closed loop, thereby improving the strength of the connection area of the starter 2 and ensuring the stability of the engine operation. Further, the opening of the clearance groove 3 is set upward, the bottom surface of the clearance groove 3 has a water leakage hole 31 set downward and connected to the outside world, and the junction between the bottom surface of the clearance groove 3 and the circumferential side wall of the clearance groove 3 has four ribs 32 set in the up-down direction. The clearance groove 3 is set to be open upward, and the water leakage hole 31 connected to the outside world is set downward on the bottom surface of the clearance groove 3, so that rainwater can flow to the outside world from the water leakage hole 31 after falling into the clearance groove 3, avoiding soaking of the starter 2 and causing work failure, thereby improving work stability, and a number of vertically extending ribs 32 are set at the junction of the bottom surface of the clearance groove 3 and the circumferential side wall of the clearance groove 3, and the up-down ribs 32 can strengthen the inner side wall of the clearance groove 3, further ensuring structural stability. Preferably, the bottom surface of the yield groove 3 has a downwardly concave and strip-shaped confluence section 33, the leakage hole 31 is located on the confluence section 33, the lower edges of the four ribs 32 are engaged with the surface of the confluence section 33, and the ribs 32 are arranged at intervals along the length direction of the confluence section 33 and divide the confluence section 33 into a plurality of water retention troughs 34.By setting a downwardly concave and strip-shaped confluence section 33 at the bottom of the yield groove 3, the upper end of the leakage hole 31 is located on the confluence section 33, and the lower side edge of the rib plate 32 is engaged with the surface of the confluence section 33. Four rib plates 32 are arranged at intervals along the length direction of the confluence section 33 and divide the confluence section 33 into four sections of water retention grooves 34. In this way, rainwater entering the yield groove 3 will preferentially flow into the confluence section 33 under the action of gravity, and then quickly discharged from the leakage hole 31; and the rib plate 32 divides the confluence section 33 into four sections of water retention grooves 34, so that part of the rainwater can be retained in the water retention grooves 34 in rainy weather, and can continuously provide heat dissipation for the box body 1 through heat absorption and evaporation during the operation of the engine, which is conducive to more efficient and stable operation of the engine. When the motorcycle is put into the garage, the rainwater in the water retention groove 34 can be evaporated by relying on the residual temperature of the engine box body 1, so as to avoid rust caused by accumulation and ensure stable operation. The surface of the confluence section 33 is in the shape of a concave arc, and the edge of the confluence section 33 is processed with a smooth transition. By setting the surface of the confluence section 33 in the shape of a concave arc and making the side of the confluence section 33 transition smoothly, rainwater can smoothly enter the confluence section 33 while avoiding stress concentration on the edge structure of the confluence section 33, so that the structure is stable. The bottom surface of the recess 3 also has a limit boss 35 protruding upward. After the starter 2 is installed, the limit boss 35 is vertically opposite to the lowest point of the starter 2. The limit boss 35 is located between two adjacent ribs 32 along the length direction of the confluence section 33, and the top position of the limit boss 35 is higher than the lowest position of the upper edge of the rib 32. By providing an upwardly protruding limiting boss 35 on the bottom surface of the yield groove 3, the limiting boss 35 is vertically opposite to the lowest point of the starter 2, so that the limiting boss 35 can limit the lowest position of the starter 2, which is beneficial to ensure the safe and accurate installation position of the starter 2. In addition, after the liquid level in the water retention tank 34 rises, the rainwater will flow out from the lowest position of the upper edge of the rib plate 32, so that the limiting boss 35 is located between two adjacent rib plates 32 along the length direction of the confluence section 33, and the top position of the limiting boss 35 is higher than the lowest position of the upper edge of the rib plate 32, so that the limiting boss 35 can be prevented from affecting the maximum water level of the water retention tank 34, and it is beneficial to ensure that the rainwater will not continue to soak the starter 2, thereby improving the working stability. The crankshaft chamber 12 and the gear chamber 11 are arranged in sequence along the front-to-back direction of the engine. The engine includes a cylinder body 4 arranged above the housing 1. The cylinder body 4 has two cylinder barrels 41 arranged in the left-to-right direction. The clearance groove 3 is adjacent to the cylinder body 4 in front and back, and the clearance groove 3 is simultaneously opposite to the lower ends of the two cylinder barrels 41 in the front-to-back direction. By arranging the crankshaft chamber 12 and the gear chamber 11 in sequence along the front-to-back direction of the engine, and the engine includes a cylinder body 4 arranged above the housing 1, so that the clearance groove 3 is opposite to the lower ends of the cylinder barrels 41 in the front-to-back direction, rainwater entering the clearance groove 3 can more directly dissipate heat in the areas where the lower ends of the two cylinder barrels 41 are located at the same time, thereby improving the heat dissipation effect. The confluence section 33 is arranged along the left-to-right direction of the engine, and the length dimension of the confluence section 33 is adapted to the left-to-right dimension of the cylinder body 4.By setting the confluence section 33 along the left-right direction of the engine, and the length of the confluence section 33 is adapted to the left-right dimension of the cylinder body 4, it is further ensured that the rainwater in each water retention tank 34 can more evenly absorb the heat transferred by each cylinder body 4, ensuring uniform and stable cooling. The leakage hole 31 is located at the edge of the bottom surface of the clearance groove 3, and the lower end of the leakage hole 31 is located on the outer surface of the box body 1 below the mounting portion 13. By setting the leakage hole 31 at the edge of the bottom surface of the clearance groove 3, the lower end of the leakage hole 31 is located on the outer surface of the box body 1 below the mounting portion 13, which is conducive to shortening the length of the leakage hole 31, minimizing its impact on the structural strength and heat dissipation effect of the engine, and ensuring smooth water flow.
[0034] like Figure 2-5 As shown, the bottom of the clearance groove 3 has two vertically arranged mounting posts 36, and the other end of the starter 2 can be fixedly connected to the mounting posts 36. By arranging the vertically arranged mounting posts 36 at the bottom of the clearance groove 3, the other end of the starter 2 is fixedly connected to the mounting posts 36, so that the forces at both ends of the starter 2 are balanced, which is conducive to ensuring the stability of the installation structure. The top joint surface of the box body 1 is parallel to the bottom joint surface of the box body 1. By making the top joint surface of the box body 1 parallel to the bottom joint surface of the box body 1, it is convenient to perform casting processing, save production costs and help ensure the stability of the connection.
[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. An engine, comprising a housing (1), wherein the housing (1) has a gear chamber (11) and a crankshaft chamber (12), characterized in that: The outer wall of the crankshaft chamber (12) has a mounting portion (13) for the drive shaft of the starter to pass through, the mounting portion (13) protruding toward the side where the gear chamber (11) is located, the outer end of the mounting portion (13) is fixedly connected to the outer wall of the gear chamber (11) via a reinforcing plate (14), the outer wall of the crankshaft chamber (12), the outer wall of the gear chamber (11), the mounting portion (13) and the reinforcing plate (14) together form a clearance groove (3) for installing the starter; the opening of the clearance groove (3) is arranged upward, and the bottom surface of the clearance groove (3) is arranged downward and in contact with the outer wall. The bottom surface of the give way groove (3) and the circumferential side wall of the give way groove (3) are connected to each other, and a plurality of ribs (32) are arranged in the vertical direction at the junction of the bottom surface of the give way groove (3) and the circumferential side wall of the give way groove (3). The bottom surface of the give way groove (3) has a strip-shaped confluence section (33) that is concave downward. The leaking hole (31) is located on the confluence section (33). The lower side edges of the plurality of ribs (32) are connected to the surface of the confluence section (33). The plurality of ribs (32) are arranged at intervals along the length direction of the confluence section (33) and divide the confluence section (33) into a plurality of water retention grooves (34).
2. The engine according to claim 1, characterized in that The surface of the converging section (33) is in the shape of a concave arc surface, and the edge of the converging section (33) is processed with a smooth transition.
3. The engine according to claim 1, characterized in that The bottom surface of the clearance groove (3) also has a limiting boss (35) protruding upwards. When the starter is installed in the clearance groove (3), the limiting boss (35) is vertically opposite to the lowest point of the starter. The limiting boss (35) is located between two adjacent ribs (32) along the length direction of the confluence section (33). The top position of the limiting boss (35) is higher than the lowest position of the upper edge of the rib (32).
4. The engine according to claim 1, 2 or 3, characterized in that: The crankshaft chamber (12) and the gear chamber (11) are arranged in sequence along the front-rear direction of the engine. The engine comprises a cylinder body (4) arranged above the housing (1). The cylinder body (4) has a plurality of cylinder barrels (41) arranged along the left-right direction. The clearance groove (3) is directly opposite to the lower ends of the plurality of cylinder barrels (41) along the front-rear direction.
5. The engine according to claim 4, characterized in that The confluence section (33) is arranged along the left-right direction of the engine, and the length dimension of the confluence section (33) is compatible with the dimension of the cylinder body (4) in the left-right direction.
6. The engine according to claim 1, 2 or 3, characterized in that: The water leakage hole (31) is located at the edge of the bottom surface of the clearance groove (3), and the lower end of the water leakage hole (31) is located on the outer surface of the box body (1) below the mounting portion (13).
7. The engine according to claim 1, 2 or 3, characterized in that: The bottom of the clearance groove (3) is provided with a plurality of mounting columns (36) for mounting a starter, and the mounting columns (36) are arranged in the up-down direction.
8. The engine according to claim 1, 2 or 3, characterized in that: The top joint surface of the box body (1) is arranged parallel to the bottom joint surface of the box body (1).