Engine and motor tricycle
By employing a sliding rotating coupling to support the bridge gear shaft in the engine, combined with a reinforced structure and sliding bearings, the problem of insufficient load-bearing capacity of rolling bearings is solved, thereby improving the stability and durability of the engine starting system.
Patent Information
- Application Number
- CN202423234788.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The rolling bearings of an engine have limited load-bearing capacity, which makes the engine prone to damage under high-performance and large-displacement conditions, increasing maintenance costs.
The bridge gear shaft is supported by a sliding rotation mechanism, eliminating the need for rolling bearings. The support of the bridge gear shaft is enhanced by the reinforced structure of the housing and cover, and wear is reduced by the combination of sliding bearings and shims.
It improves the stability and durability of the engine starting system, reduces maintenance and repair costs, and decreases the likelihood of damage to transmission components.
Smart Images
Figure CN223676409U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of engine, concretely relates to an engine and a three-wheeled motorcycle. BACKGROUND
[0002] The electric starting system of the engine generally comprises a starting motor, a double gear, a bridge gear, a disc gear and an overrunning clutch, and the bridge gear at both ends is generally supported by bearings for rotation, due to the structural limitations of the engine box and the box cover, the bearings are generally rolling bearings (more rolling needle bearings are used), since the bearing capacity of the rolling bearings is limited, and the performance requirements of the market for the engine are higher and higher, and the displacement of the engine is larger and larger, but in order to save costs, the mounting structure of the engine is not adjusted for most vehicles, so that the space for adjusting the structure of the engine box is limited; in addition, the environment used by more vehicles (such as three-wheeled motorcycles) is relatively harsh and the load is relatively large, plus the increase of the displacement of the engine, the torque required during starting is larger, the stress between the gears is larger, and the stress of the bearing supporting the gear is also larger, since the bearing capacity of the rolling bearing is low, damage is easily caused, and the maintenance cost is increased.
[0003] Therefore, it is necessary to improve the structure of the existing engine starting system to avoid the problem of high maintenance and repair cost caused by bearing damage. SUMMARY
[0004] Therefore, the utility model aims at providing an engine and a three-wheeled motorcycle, improving the starting system of the engine, avoiding the problem of high maintenance and repair cost caused by bearing damage, reducing the damage probability of the transmission assembly to enhance the stability of the starting system, reducing the assembly and repair time and reducing the cost of the engine.
[0005] To achieve the above-mentioned purpose, the utility model provides an engine, which comprises a box, a cover and a starting system, the starting system comprises a starting power source and a transmission mechanism, the transmission mechanism comprises a bridge gear set, the bridge gear set comprises a bridge gear shaft and a transmission gear provided on the bridge gear shaft.
[0006] The bridge gear shaft is supported on the box and the cover by sliding rotation.
[0007] Further, the shaft section of the bridge gear shaft supported on the box is longer than the shaft section supported on the cover.
[0008] Further, the box is provided with a box intermediate shaft seat, the cover is provided with a cover intermediate shaft seat, and the bridge gear shaft is supported on the box intermediate shaft seat and the cover intermediate shaft seat by rotation, so that the bridge gear shaft is supported on the box and the cover by sliding rotation.
[0009] Further, the middle shaft seat of the box body is integrally formed in the box body through the reinforcing structure I, and the middle shaft seat of the box cover is integrally formed in the box cover through the reinforcing structure II.
[0010] Further, the reinforcing structure I is a reinforcing rib, reinforcing treatment at the connecting position of the middle shaft seat of the box body and the box body, or / and the middle shaft seat of the box body is in the shape of a truncated cone, the reinforcing structure II is a reinforcing rib, reinforcing treatment at the connecting position of the middle shaft seat of the box cover and the box cover, or / and the middle shaft seat of the box cover is in the shape of a truncated cone.
[0011] Further, the bridge gear shaft is supported on the middle shaft seat of the box body, and a gasket is arranged between the bottom of the seat hole of the middle shaft seat of the box body and the bottom of the seat hole of the middle shaft seat of the box cover.
[0012] Further, the length of the bridge gear shaft supported on the middle shaft seat of the box body accounts for 1 / 3-2 / 3 of the total length of the bridge gear shaft.
[0013] Further, the length of the bridge gear shaft supported on the middle shaft seat of the box body accounts for 1 / 3-2 / 3 of the total length of the bridge gear shaft.
[0014] The application further discloses a three-wheeled motorcycle adopting the engine.
[0015] The engine and the three-wheeled motorcycle have the advantages that the starting system structure of the engine is improved, the assembly mode of the rolling bearing of the existing bridge gear shaft is cancelled, the bridge gear shaft is supported on the box body through sliding rotation, the damage of the transmission assembly caused by the damage of the rolling bearing is eliminated, the stability and durability of the starting system of the engine are improved, the assembly and maintenance time is reduced, and the manufacturing cost and the maintenance cost of the engine are reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] The application will be further described below in combination with the drawings and embodiments:
[0017] Figure 1 Fig. 1 is a structural schematic view of the engine;
[0018] Figure 2 Fig. 4 is a structural schematic view of the middle shaft seat of the box body;
[0019] Figure 3 Fig. 5 is a structural schematic view of the middle shaft seat of the box cover;
[0020] Figure 4 Fig. 6 is a schematic view of the axial section of the bridge gear set along the bridge gear shaft.
[0021] In the drawings, the following reference signs are used:
[0022] 1. Motor; 2. Drive gear; 301. First intermediate gear; 302. Second intermediate gear; 4. Bridge gear set; 401. Third intermediate gear; 402. Fourth intermediate gear; 403. Bridge gear shaft; 5. Disc gear; 6. Crankshaft; 7. Housing intermediate shaft seat; 8. Reinforcing rib; 9. Housing cover intermediate shaft seat. Detailed Implementation
[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a schematic diagram of the intermediate bearing structure of the housing. Figure 3 This is a schematic diagram of the intermediate bearing structure of the box cover. Figure 4 This is a schematic cross-sectional view of the bridge gear set 4 along the axial direction of the bridge gear shaft 403, as shown below. Figures 1-4 As shown: The engine in this embodiment includes a housing, a cover, and a starting system. The starting system includes a starting power source and a transmission mechanism. The transmission mechanism includes a bridge gear set 4, which includes a bridge gear shaft 403 and a transmission gear mounted on the bridge gear shaft. The starting power source is generally a motor 1, which only needs to provide the starting power for the engine and will not be described in detail here. The output end of the motor 1 is provided with a drive gear 2, which drives the first intermediate gear 301 to rotate. The second intermediate gear 302 follows the rotation and drives the third intermediate gear 401 to rotate. The fourth intermediate gear 402 follows the rotation and drives the disc gear. 5. Rotation, the third intermediate gear 401 and the fourth intermediate gear 402 are double gears (double gears make the force on the bridge gear shaft 403 more uniform when transmitting torque, and also increase the rigidity of the entire transmission system, reducing the instability of movement caused by gear vibration, deformation and other factors during operation), and are the transmission gears of this utility model. The transmission gears are rotatably mounted on the bridge gear shaft 403. The bridge gear shaft 403 on which the third intermediate gear 401 and the fourth intermediate gear 402 are mounted is the bridge gear shaft 403 of this utility model. Of course, the starting system also includes other intermediate gear sets.
[0024] The bridge gear shaft 403 is supported by the housing and the cover through a sliding rotational fit. The sliding rotational fit leaves a certain gap between the bridge gear shaft 403 and the housing and the cover to allow relative rotation. During the rotation, sliding friction will occur on the contact surfaces, and the gap is lubricated by oil, thereby reducing the wear between the bridge gear shaft 403 and the housing and the cover. Compared with the prior art, this utility model eliminates the bearings at both ends of the bridge gear shaft 403. This embodiment enhances the strength of the bridge gear shaft 403 to further reduce the wear of the gear shaft. The enhancement method can be to add a carburizing and quenching process to the bridge gear shaft 403, which can improve the strength of the bridge gear shaft 403. It will not be described in detail here.
[0025] In the embodiment, the shaft section of the bridging gear shaft 403 supported on the box is longer than the shaft section supported on the box cover; the length of the shaft section of the bridging gear shaft 403 supported on the box is greatly improved compared with the length of the shaft section of the bridging gear shaft 403 supported on the box in the existing starting system, the length of the shaft section of the bridging gear shaft 403 supported on the box is effectively increased to increase the transfer torque that can be borne, thereby adapting to starting of an engine with a larger displacement and improving the success rate of starting the engine of a three-wheeled motorcycle that bears a larger load.
[0026] In the embodiment, the box is provided with a box intermediate shaft seat 7, the box cover is provided with a box cover intermediate shaft seat 9, and the bridging gear shaft 403 is rotationally supported on the box intermediate shaft seat 7 and the box cover intermediate shaft seat 9, so that the bridging gear shaft 403 is supported on the box and the box cover through sliding rotation; the box intermediate shaft seat 7 and the box cover intermediate shaft seat 9 are provided with a seat hole, the bridging gear shaft 403 extends into the seat hole and forms a sliding rotation with the seat hole; the sliding rotation can be that the bridging gear shaft 403 directly matches the seat hole, or a sliding bearing such as a sliding shaft sleeve or a sliding bushing is arranged between the bridging gear shaft 403 and the seat hole; the sliding bearing can be directly replaced when damaged, thereby reducing the damage probability of the engine box.
[0027] In the embodiment, the box intermediate shaft seat 7 is integrally formed on the box through a reinforcing structure I, and the box cover intermediate shaft seat 9 is integrally formed on the box cover through a reinforcing structure II; the reinforcing structure I, the box intermediate shaft seat 7 and the reinforcing structure II, and the box cover intermediate shaft seat 9 are integrally formed when the box and the box cover are cast, thereby optimizing the process, reducing the number of parts, and having better connectivity, higher strength, ensuring that the bridging gear shaft 403 can bear a larger starting torque, thereby increasing the stability and durability of the engine starting system.
[0028] In the embodiment, the reinforcing structure I is a reinforcing rib 8, reinforcing treatment at the connection between the box intermediate shaft seat 7 and the box, or / and the box intermediate shaft seat 7 has a conical frustum shape; the reinforcing structure II is a reinforcing rib, reinforcing treatment at the connection between the box cover intermediate shaft seat 9 and the box cover, or / and the box cover intermediate shaft seat 9 has a conical frustum shape; as shown in Figure 2 As shown in Figure 3 The reinforcing treatment is that the root of the box intermediate shaft seat 7 is thickened to form a boss or the like when connected with the box, which can enhance the stress intensity of the box intermediate shaft seat 7, and details are not described herein; the conical frustum shape is that the root of the box intermediate shaft seat 7 is larger than the end, and the reinforcing structure is integrally formed on the box; the box cover intermediate shaft seat 9 is the same as the box intermediate shaft seat 7, and details are not described herein.
[0029] In the embodiment, the bridge gear shaft 403 is correspondingly provided with a gasket between the bottom of the seat hole of the middle shaft seat 7 of the box body and the bottom of the seat hole of the middle shaft seat 9 of the box cover; during the starting process, the vibration generated by the driving of the motor 1 to drive the bridge gear set 4 to rotate will continuously wear the middle shaft seat 7 of the box body and the middle shaft seat 9 of the box cover and cause a slight impact, and in the embodiment, the gasket is correspondingly provided between the bridge gear shaft 403 and the bottom of the seat hole of the middle shaft seat 7 of the box body and the bottom of the seat hole of the middle shaft seat 9 of the box cover, and the gasket is generally made of rubber elastic material, which can prevent the bridge gear shaft 403 from wearing the box body and the box cover, thereby increasing the stability and durability of the engine starting system and reducing the engine maintenance and repair cost.
[0030] In the embodiment, the length of the bridge gear shaft 403 supported on the middle shaft seat 7 of the box body accounts for 1 / 3-2 / 3 of the total length of the bridge gear shaft 403; the proportion of 1 / 3-2 / 3 makes the bridge gear shaft 403 have a longer supporting length, the force distribution is more uniform, the bearing capacity is improved, the damage of the middle shaft seat 7 of the box body caused by excessive local force is reduced, the transmission torque of the bridge gear shaft 403 is improved, and the engine can adapt to larger load demand.
[0031] In the embodiment, the length of the bridge gear shaft 403 supported on the middle shaft seat 7 of the box body is 0.43 of the total length of the bridge gear shaft 403; as shown in the figure, Figure 4 the proportion of 0.43 in the embodiment ensures a larger supporting length and also makes the engine space more compact, and then the bridge gear shaft 403 can withstand larger transmission demand, thereby improving the stability of the engine.
[0032] As shown in the figure, Figure 1 when the engine starts, the driving gear 2 at the output end of the starting motor 1 drives the first intermediate gear 301 to rotate, the second intermediate gear 302 rotates and drives the third intermediate gear 401 to rotate, the fourth intermediate gear 402 rotates and drives the disc gear 5 to rotate, the disc gear 5 drives the crankshaft 6 to rotate through the one-way clutch, and when the crankshaft 6 reaches a certain speed, the engine is ignited, thereby completing the starting of the engine.
[0033] The application also discloses a three-wheeled motorcycle adopting the engine, and the starting system structure of the engine is improved, the rolling bearing assembly mode of the existing bridge gear shaft 403 is cancelled, the bridge gear shaft 403 is supported on the box body through sliding rotation, and the strength of the corresponding shaft seat is strengthened, thereby eliminating the damage of the transmission assembly caused by the damage of the rolling bearing, enhancing the stability and durability of the engine starting system, reducing the assembly, maintenance and repair time, and reducing the engine manufacturing cost, thereby improving the stability and durability of the three-wheeled motorcycle and reducing the cost.
[0034] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.
Claims
1. An engine characterized by: The engine comprises a casing, a cover and a starting system, the starting system comprises a starting power source and a transmission mechanism, the transmission mechanism comprises a bridge gear set, the bridge gear set comprises a bridge gear shaft and a transmission gear arranged on the bridge gear shaft; The bridge gear shaft is supported on the casing and the cover by sliding rotary fit; The length of the shaft section of the bridge gear shaft supported on the casing is longer than that supported on the cover; The casing is provided with a casing middle shaft seat, the cover is provided with a cover middle shaft seat, and the bridge gear shaft is supported on the casing middle shaft seat and the cover middle shaft seat by rotary fit, so that the bridge gear shaft is supported on the casing and the cover by sliding rotary fit.
2. The engine of claim 1, wherein: The casing middle shaft seat is integrally formed on the casing by a reinforcing structure I, and the cover middle shaft seat is integrally formed on the cover by a reinforcing structure II.
3. The engine of claim 2, wherein: The reinforcing structure I is a reinforcing rib, reinforcing treatment at the connection between the casing middle shaft seat and the casing, or / and the casing middle shaft seat has a conical frustum shape, and the reinforcing structure II is a reinforcing rib, reinforcing treatment at the connection between the cover middle shaft seat and the cover, or / and the cover middle shaft seat has a conical frustum shape.
4. The engine of claim 1, wherein: A gasket is arranged between the bottom of the seat hole of the casing middle shaft seat and the bottom of the seat hole of the cover middle shaft seat.
5. The engine of claim 1, wherein: The length of the bridge gear shaft supported on the casing middle shaft seat accounts for 1 / 3-2 / 3 of the total length of the bridge gear shaft.
6. The engine of claim 1, wherein: The length of the bridge gear shaft supported on the casing middle shaft seat is 0.43 of the total length of the bridge gear shaft.
7. A three-wheeled motorcycle characterized by: The three-wheeled motorcycle comprises the engine according to any one of claims 1-6.