Motor tricycle engine with external reversing mechanism and motor tricycle

Abstract

The utility model discloses a motor tricycle engine with an external reversing mechanism. The motor tricycle engine comprises a main box body, a built-in reverse gear mechanism arranged in the main box body and an outer box body installed outside the main box body. The built-in reverse gear mechanism is provided with a reverse gear mechanism output shaft, the outer box body is provided with a reversing mechanism, the reversing mechanism comprises a reversing output shaft which is perpendicular to the reverse gear mechanism output shaft and is in transmission connection with the reverse gear mechanism output shaft, and the axis of the reversing output shaft is arranged close to the center of the engine and near the center. The engine provided by the utility model integrates the reverse gear function and the reversing function, so that the whole vehicle has better compactness, and as the axis of the reversing output shaft is arranged close to the center of the engine and near the center, the whole vehicle has better controllability; meanwhile, the use universality and the economical efficiency are better; the utility model further provides a motor tricycle which is provided with the motor tricycle engine with the external reversing mechanism, and the axis of the reversing output shaft is arranged right opposite to the center of a rear axle.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-wheeled motorcycles, and in particular relates to a three-wheeled motorcycle engine with an externally arranged reversing mechanism and a three-wheeled motorcycle. Background Art

[0002] The existing three-wheeled motorcycle engine integrates the reverse gear and the reversing mechanism into the engine housing, and arranges the output pump of the reversing mechanism in the longitudinal center during the design. The reversing output shaft can be aligned with the center of the rear axle when the whole vehicle is arranged, which is conducive to improving the controllability of the whole vehicle, as well as improving the compactness and transmission reliability of the whole vehicle. However, in this structure, when the vehicle chassis design changes, the reversing output shaft can only be aligned with the center of the rear axle by adjusting the installation position of the entire engine, or the position of the reversing output shaft can be changed by redesigning and adjusting the internal structure size of the engine, which has high modification costs and low versatility. At the same time, since the engine housing is also equipped with components such as a speed change mechanism and a clutch, this fully built-in structure of the reverse gear and the reversing mechanism increases the complexity of the internal structure of the engine housing, and the design and manufacturing are difficult; and the integration of all functional mechanisms in one housing easily leads to maintenance difficulties, especially the reversing mechanism often needs to adopt a relatively easy-to-damage bevel gear transmission structure. If it is damaged, the engine needs to be disassembled and assembled as a whole, which has high maintenance costs; and if the reversing mechanism is damaged, it may also cause damage to other components such as the main output shaft, which will also increase the maintenance cost, and the economic efficiency of use is low. Therefore, there is an urgent need to provide a new three-wheeled motorcycle engine that can help the entire vehicle have better controllability and compactness, while also having better versatility and economy. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a three-wheeled motorcycle engine with an external reversing mechanism, which can help the whole vehicle have better controllability and compactness, while also having better versatility and economy.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-wheeled motorcycle engine with an external reversing mechanism, comprising a main housing, a built-in reverse gear mechanism arranged in the main housing and an outer housing installed outside the main housing; the built-in reverse gear mechanism is provided with a reverse gear mechanism output shaft, the outer housing is provided with a reversing mechanism, the reversing mechanism comprises a reversing output shaft arranged perpendicularly to and transmission-connected with the reverse gear mechanism output shaft, and the axis of the reversing output shaft is arranged near the center of the engine and near the center.

[0005] Furthermore, the reversing mechanism further comprises a reversing input shaft, the reversing input shaft is transmission-connected to the output shaft of the reverse gear mechanism, and the reversing output shaft is transmission-connected to the reversing input shaft via a bevel gear set.

[0006] Furthermore, the reversing input shaft is coaxially connected to the reverse gear mechanism output shaft.

[0007] Furthermore, the main case includes a left crankcase and a transmission case cover covering the left side of the left crankcase, a transmission cavity is formed between the transmission case cover and the left crankcase, and the built-in reverse gear mechanism is arranged in the transmission cavity.

[0008] Furthermore, it also includes a secondary shaft arranged on the main housing, the output end of the secondary shaft extends into the transmission cavity, and the output shaft of the reverse gear mechanism is arranged in parallel with the secondary shaft.

[0009] Furthermore, the built-in reverse gear mechanism also includes a forward gear driving gear and a reverse gear driving gear which are freely sleeved on the countershaft, a reverse gear sliding sleeve which is synchronously rotated and arranged on the countershaft, a forward gear driven gear and a reverse gear driven gear which are synchronously rotated and arranged on the output shaft of the reverse gear mechanism, and a bridge gear which is rotatably installed on the main case, the bridge gear is meshed with the reverse gear driving gear, the reverse gear driven gear is meshed with the bridge gear, and the forward gear driven gear is meshed with the forward gear driving gear; the reverse gear sliding sleeve can be driven to slide and respectively engage with the forward gear driving gear and the reverse gear driving gear and form a relative fixation.

[0010] Furthermore, a rear portion of the left crankcase on the left side extends backward to form a protrusion, and a reverse gear mechanism output shaft mounting hole and an outer case mounting surface are provided on the protrusion, and the outer case is mounted on the outer case mounting surface.

[0011] Furthermore, the outer box body includes a shell body fixedly mounted on the mounting surface of the outer box body and a right bearing cover fixed to the right end of the shell body, and both ends of the reversing input shaft are correspondingly rotatably mounted on the shell body and the right bearing cover.

[0012] Furthermore, the outer box body also includes a rear bearing cover fixed to the rear end of the shell body, and the reversing output shaft is rotatably mounted on the rear bearing cover and extends outward along its own axial direction to be exposed from the rear bearing cover.

[0013] The utility model also provides a three-wheeled motorcycle equipped with a three-wheeled motorcycle engine with an externally mounted reversing mechanism as described above, wherein the axis of the reversing output shaft is arranged directly opposite to the center of the rear axle.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The engine provided by the utility model has integrated reverse gear and reversing functions, which is conducive to the compactness of the whole vehicle, and because the axis of the reversing output shaft is arranged close to the center of the engine and near the center, it is conducive to the good maneuverability of the whole vehicle; at the same time, because the reversing mechanism is arranged in an independent outer box body, when the chassis design of the whole vehicle is changed, it is only necessary to adjust the design of the reversing mechanism and the outer box body to meet the adjustment of the lateral position of the reversing output shaft in the whole vehicle, so as to achieve alignment with the center of the rear axle, without adjusting the installation position of the whole engine on the whole vehicle or redeveloping and designing a new engine, and has good versatility and economy of use; at the same time, the internal structure of the main box body of the engine is simplified, which is conducive to reducing the design and manufacturing costs and improving the economy of use; at the same time, when the reversing mechanism is damaged, the reversing mechanism can be inspected and repaired separately. The utility model can be repaired and maintained, which reduces the maintenance cost and improves the economical use. At the same time, the damage of the reversing mechanism will not cause collateral losses to the main shaft, the secondary shaft, etc., which improves the economical use. At the same time, compared with the traditional engine without reversing function, the volume of the engine box of the three-wheeled motorcycle engine changes less (the volume of the existing structure box with fully built-in shifting and reversing mechanisms changes greatly), which is particularly suitable for the modified design on the traditional frame. The traditional engine can be directly replaced by the engine in the present application without changing the suspension position, and the economical use and versatility are good. The three-wheeled motorcycle provided by the utility model has good maneuverability, which is conducive to the equal length setting of the rear axle half shafts, and at the same time has good maintainability and economical use. When the reversing mechanism is damaged, there is no need to dismantle the engine, and only the reversing mechanism needs to be repaired.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the partial cross-section structure of the utility model

[0018] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle

[0019] Figure 3 This is a left-side structural schematic diagram of the utility model after removing the transmission box cover

[0020] Figure 4 Schematic diagram of the shaft side structure of the utility model

[0021] Figure 5 Schematic diagram of the left crankcase shaft side structure

[0022] Reference numerals: 1-main housing; 101-left crankcase; 101a-protrusion; 201a-1-reverse gear mechanism output shaft mounting hole; 201a-2-outer housing mounting surface; 102-transmission housing cover; 102a-transmission chamber; 2-countershaft; 3-outer housing; 301-housing; 302-right bearing cover; 303-rear bearing cover; 4-reversing mechanism; 401-reversing output shaft; 402-reversing input shaft; 403-driving bevel gear; 404-driven bevel gear; 5-built-in reverse gear mechanism; 501-reverse gear mechanism output shaft; 502-forward gear driving gear; 502a-forward gear internal gear joint; 503-reverse gear driving gear; 503a-reverse gear internal gear joint; 504-reverse gear sliding sleeve; 504a-fork groove; 504b-reverse gear engaging teeth; 504c-forward gear engaging teeth; 505-bridge gear; 506-forward gear driven gear; 507-reverse gear driven gear. DETAILED DESCRIPTION

[0023] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

[0024] It should be noted that, unless otherwise specified, the directional words such as "front", "rear", "left", "right", "lateral" and "longitudinal" mentioned below are all based on the position of the engine on the vehicle, where the front and rear direction of the vehicle is the longitudinal direction and the left and right direction of the vehicle is the lateral direction.

[0025] See also Figure 1-5The present embodiment discloses a three-wheeled motorcycle engine with an external reversing mechanism, comprising a main housing 1, a built-in reverse gear mechanism 5 arranged in the main housing 1, and an outer housing 3 installed outside the main housing 1. The main housing 1 here generally refers to the crankcase of the three-wheeled motorcycle engine. The crankcase is generally formed by docking and fixing a left crankcase 101 and a right crankcase. The design can be made with reference to the existing structure and will not be repeated here. The outer housing 3 is preferably installed with the main housing 1 by bolts; the built-in reverse gear mechanism 5 is provided with a reverse gear mechanism output shaft 501, and the outer housing 3 is provided with a reverse gear mechanism output shaft 501. The body 3 is provided with a reversing mechanism 4, the reversing mechanism 4 includes a reversing output shaft 401 arranged vertically and transmission-connected to the output shaft 501 of the reverse gear mechanism, and the axis of the reversing output shaft 401 is arranged near the center of the engine or near the center, and the reversing output shaft 401 can be arranged near the center of the engine or near the center by a gear transmission mechanism, and the arrangement near the center of the engine certainly includes the arrangement through the center of the engine, that is, the arrangement near the middle of the engine, which can be determined according to the position that can be aligned with the center of the rear axle when the whole vehicle is arranged;

[0026] The engine in the above structural design has integrated reverse gear and reversing functions, which is conducive to the compactness of the whole vehicle. Since the axis of the reversing output shaft 401 is arranged close to the center of the engine and near the center, it is conducive to the good maneuverability of the whole vehicle and the equal length design of the rear axle half shaft. At the same time, since the reversing mechanism 4 is arranged in an independent outer box body 3, when the chassis design of the whole vehicle is changed, it is only necessary to adjust the design of the reversing output shaft in the lateral direction of the whole vehicle, so as to achieve alignment with the center of the rear axle, without adjusting the installation position of the whole engine on the whole vehicle or redeveloping and designing a new engine, which has good versatility and economy. At the same time, the main box body 1 of the engine is simplified. The internal structure is conducive to reducing the design and manufacturing costs and improving the economical use. At the same time, when the reversing mechanism 4 is damaged, the reversing mechanism 4 can be inspected and maintained separately, which reduces the maintenance cost and improves the economical use. At the same time, the damage of the reversing mechanism 4 will not cause collateral losses to the main shaft, output shaft, etc., which improves the economical use. At the same time, compared with the traditional engine without reversing function, the volume of the engine box of the three-wheeled motorcycle engine changes less (the volume of the existing structure box with fully built-in shifting and reversing mechanisms changes greatly), which is particularly suitable for the modified design on the traditional frame, and the traditional engine can be directly replaced by the engine in this application without changing the suspension position, and the economical use and versatility are good.

[0027] In this embodiment, the reversing mechanism 4 also includes a reversing input shaft 402, and the reversing input shaft 402 is transmission-connected with the reverse gear mechanism output shaft 501. Preferably, the reversing input shaft 402 is directly connected with the reverse gear mechanism output shaft 501, and the reversing output shaft 401 is transmission-connected with the reversing input shaft 402 through a bevel gear set; specifically, the bevel gear set includes a driving bevel gear 403 coaxially fixed to the reversing input shaft 402 and a driven bevel gear 404 meshing with the driving bevel gear 403 and coaxially fixed to the driven bevel gear 404. More specifically, the driving bevel gear 403 is fixed to the reversing input shaft 402 through a spline, and the driven bevel gear 404 and the reversing output shaft 401 are an integrated structure; this structural design can realize the transmission of power from the reverse gear mechanism output shaft 501 to the reversing output shaft 401, and the structure is simple; the reversing output shaft 401 is transmission-connected with the reversing input shaft 402 through the bevel gear set, and the transmission structure is simple and reliable, and the transmission efficiency is high.

[0028] In this embodiment, the reversing input shaft 402 is coaxially connected to the reverse gear mechanism output shaft 501; specifically, the reversing input shaft 402 and the reverse gear mechanism output shaft 501 are connected via a spline; the reasonable arrangement and coaxial connection are beneficial to further improving the compactness of the overall structure, and at the same time, the transmission chain is short, which is beneficial to improving the transmission efficiency.

[0029] In this embodiment, the main case 1 includes a left crankcase 101 and a transmission case cover 102 covering the left side of the left crankcase 101. Specifically, the transmission case cover 102 is fixed to the left crankcase 101 by bolts, and a transmission chamber 102a is formed between the transmission case cover 102 and the left crankcase 101, and the built-in reverse gear mechanism 5 is located in the transmission chamber 102a; by providing an independent transmission chamber 102a on the left crankcase 101 and providing the transmission case cover 102, it is convenient to perform separate maintenance on the built-in reverse gear mechanism 5 located in the transmission chamber 102a, and it is also convenient for manufacturing and assembly; at the same time, it is convenient to separate the shifting operation from the engine speed change mechanism to avoid misoperation; at the same time, it does not affect the internal structure design of the crankcase, and is convenient to simplify the internal structure design of the crankcase; it is provided on the left side of the left crankcase, with a reasonable position and high compactness.

[0030] In the present embodiment, it also includes a countershaft 2 arranged in the main housing 1. The countershaft 2 refers to the countershaft of the speed change mechanism integrated in the main housing 1, and can be designed with reference to the existing three-wheeled motorcycle starting structure, which will not be described in detail here. The output end of the countershaft 2 extends into the transmission cavity 102a, and the reverse gear mechanism output shaft 501 is arranged in parallel with the countershaft 2; in this structural design, the reverse gear mechanism output shaft 501 is arranged in parallel with the countershaft 2. At the same time, by extending the output end of the countershaft 2 into the transmission cavity 102a, the countershaft 2 can be used to complete the arrangement of the built-in reverse gear mechanism 4, and the docking connection with the countershaft 2 can be omitted. The structure is simple, which is conducive to simplifying the arrangement structure of the built-in reverse gear mechanism 4.

[0031] In this embodiment, the built-in reverse gear mechanism also includes a forward gear driving gear 502 and a reverse gear driving gear 503 which are sleeved on the countershaft 2, a reverse gear sliding sleeve 504 which is synchronously rotated and arranged on the countershaft 2, a forward gear driven gear 506 and a reverse gear driven gear 507 which are synchronously rotated and arranged on the output shaft 501 of the reverse gear mechanism, and a bridge gear 505 which is rotatably installed on the main housing 1, wherein the bridge gear 505 is meshed with the reverse gear driving gear 503, the reverse gear driven gear 507 is meshed with the bridge gear 505, and the forward gear driven gear 506 is meshed with the forward gear driving gear 502; the reverse gear sliding sleeve 504 can be driven to slide and respectively engage with the forward gear driving gear 502 and the reverse gear driving gear 507. 3 is engaged and relatively fixed; the reverse gear sliding sleeve 504 can be shifted by a conventional reverse gear fork, and its driving mode is an existing structure, which will not be described here; the above-mentioned "synchronous rotation setting" can be realized by but not limited to spline connection and other methods. In this structural design, since the rotation of the secondary shaft 2 may be in different speed gears, the motorcycle can achieve reverse driving in multiple gears, thereby improving the performance of the motorcycle; in addition, since the built-in reverse gear mechanism is an additional setting, the original normal driving gear of the motorcycle is retained, and compared with the motorcycle engine of the prior art that reduces the normal gear to obtain the built-in reverse gear mechanism, the road adaptability of the motorcycle is improved; the built-in reverse gear mechanism 5 has a simple structure and reliable transmission;

[0032] More specifically, the reverse gear sleeve 504 is slidably fitted on the countershaft 2 through a spline, a fork groove 504a is provided in the middle of the reverse gear sleeve 504, and the spline fitting installation transmission is reliable; the reverse gear sleeve 504 is provided with a reverse gear engaging tooth 504b and a forward gear engaging tooth 504c at both axial ends thereof, respectively, and the reverse gear driving gear 503 is provided with a reverse gear engaging portion 503a for engaging with the reverse gear engaging tooth 504b, and the forward gear driving gear 502 is provided with a forward gear engaging portion 502a for engaging with the forward gear engaging tooth 504c; in this structural design, power is transmitted through the meshing of the spline and the combining teeth, and the power transmission is reliable.

[0033] In this embodiment, the rear portion of the left crankcase 101 on the left side extends backward to form a raised portion 101a, and the raised portion 101a is provided with a reverse gear mechanism output shaft mounting hole 101a-1 and an outer box body mounting surface 101a-2, and the outer box body 3 is mounted on the outer box body mounting surface 101a-2. Specifically, the reverse gear mechanism output shaft 501 is mounted on the reverse gear mechanism output shaft mounting hole 101a-1 through a bearing, and the outer box body mounting surface 101a-2 is preferably a plane, and a mounting hole is provided on the outer box body mounting surface 101a-2. The body 103 is mounted on the outer case mounting surface 201a-2 by bolts; in this structural design, by designing a protrusion 101a on the left crankcase 101, the reverse gear mechanism output shaft 501 can be assembled on the protrusion 101a, which is beneficial for the reversing input shaft 402 to be directly connected to the reverse gear mechanism output shaft 501, and can also provide a mounting position for the outer case 103. The layout is reasonable, and the engine case structure changes little, which is beneficial to further improve the compactness of the structure, facilitate the layout of the reversing mechanism 1, and also help to improve the sealing of the outer case 103 installation point and improve reliability.

[0034] In this embodiment, the outer box body 3 includes a shell body 301 fixedly mounted on the outer box body mounting surface 101a-2 and a right bearing cover 302 fixed to the right end of the shell body 301, and the two ends of the reversing input shaft 402 are correspondingly rotatably mounted on the shell body 301 and the right bearing cover 302; specifically, here the two ends of the reversing input shaft 402 complete the corresponding rotational installation through bearings, and the shell body 301 and the rear bearing cover 303 are respectively fixed and installed by bolts. In this structural design, the two ends of the reversing input shaft 402 are supported, the transmission is reliable, and the disassembly and assembly are good, which is conducive to further reducing maintenance costs.

[0035] In this embodiment, the outer box body 3 also includes a rear bearing cover 303 fixed to the rear end of the shell 301, and the reversing output shaft 401 is rotatably installed on the rear bearing cover 303 and extends outward along its own axis to be exposed from the rear bearing cover 303; specifically, the rear bearing cover 303 is fixed to the shell 301 by bolts. Through the design of the rear bearing cover 303, a mounting position can be provided for the reversing output shaft 401, and it has good disassembly and assembly performance, which is conducive to further reducing maintenance costs.

[0036] The present embodiment also discloses a three-wheeled motorcycle, which is equipped with a three-wheeled motorcycle engine with an external reversing mechanism as described above, and the axis of the reversing output shaft 401 is arranged directly opposite the center of the rear axle; the three-wheeled motorcycle has good maneuverability, which is conducive to achieving equal length setting of the rear axle half shafts, and at the same time has good maintainability and economic use. When the reversing mechanism is damaged, there is no need to dismantle the engine, and only the reversing mechanism needs to be repaired.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A three-wheeled motorcycle engine with an external reversing mechanism, characterized in that: It comprises a main housing (1), a built-in reverse gear mechanism (5) arranged in the main housing (1), and an outer housing (3) installed outside the main housing (1); The built-in reverse gear mechanism (5) is provided with a reverse gear mechanism output shaft (501), and the outer box body (3) is provided with a reversing mechanism (4), the reversing mechanism (4) comprises a reversing output shaft (401) arranged vertically and transmission-connected to the reverse gear mechanism output shaft (501), and the axis of the reversing output shaft (401) is arranged close to the center of the engine or in the vicinity of the center.

2. The three-wheeled motorcycle engine with an externally mounted reversing mechanism according to claim 1, characterized in that: The reversing mechanism (4) further comprises a reversing input shaft (402), the reversing input shaft (402) being transmission-connected to the reverse gear mechanism output shaft (501), and the reversing output shaft (401) being transmission-connected to the reversing input shaft (402) via a bevel gear set.

3. The three-wheeled motorcycle engine with an externally mounted reversing mechanism according to claim 2, characterized in that: The reversing input shaft (402) is coaxially connected to the reverse gear mechanism output shaft (501).

4. The three-wheeled motorcycle engine with an externally mounted reversing mechanism according to claim 2, characterized in that: The main case (1) comprises a left crankcase (101) and a transmission case cover (102) covering the left side of the left crankcase (101); a transmission chamber (102a) is formed between the transmission case cover (102) and the left crankcase (101); and the built-in reverse gear mechanism (5) is arranged in the transmission chamber (102a).

5. The three-wheeled motorcycle engine with an externally mounted reversing mechanism according to claim 4, characterized in that: It also comprises a secondary shaft (2) arranged on the main housing (1), the output end of the secondary shaft (2) extending into the transmission cavity (102a), and the reverse gear mechanism output shaft (501) being arranged in parallel with the secondary shaft (2).

6. The three-wheeled motorcycle engine with an externally mounted reversing mechanism according to claim 5, characterized in that: The built-in reverse gear mechanism further comprises a forward gear driving gear (502) and a reverse gear driving gear (503) which are loosely sleeved on the secondary shaft (2), a reverse gear sliding sleeve (504) which is synchronously rotatably arranged on the secondary shaft (2), a forward gear driven gear (506) and a reverse gear driven gear (507) which are synchronously rotatably arranged on the output shaft (501) of the reverse gear mechanism, and a bridge gear (505) which is rotatably mounted on the main housing (1), the bridge gear (505) being meshed with the reverse gear driving gear (503), the reverse gear driven gear (507) being meshed with the bridge gear (505), and the forward gear driven gear (506) being meshed with the forward gear driving gear (502); the reverse gear sliding sleeve (504) can be driven to slide and respectively engage with the forward gear driving gear (502) and the reverse gear driving gear (503) to form a relative fixation.

7. The three-wheeled motorcycle engine with an externally mounted reversing mechanism according to claim 5, characterized in that: A rear portion of the left crankcase (101) on the left side extends backward to form a protrusion (101a), the protrusion (101a) is provided with a reverse gear mechanism output shaft mounting hole (101a-1) and an outer case mounting surface (101a-2), and the outer case (3) is mounted on the outer case mounting surface (101a-2).

8. The three-wheeled motorcycle engine with an externally mounted reversing mechanism according to claim 7, characterized in that: The outer box body (3) comprises a shell (301) fixedly mounted on the outer box body mounting surface (101a-2) and a right bearing cover (302) fixed to the right end of the shell body (301), and the two ends of the reversing input shaft (402) are correspondingly rotatably mounted on the shell body (301) and the right bearing cover (302).

9. The three-wheeled motorcycle engine with an externally mounted reversing mechanism according to claim 8, characterized in that: The outer box body (3) further comprises a rear bearing cover (303) fixed to the rear end of the housing (301), and the reversing output shaft (401) is rotatably mounted on the rear bearing cover (303) and extends outwardly along its own axial direction to be exposed from the rear bearing cover (303).

10. A three-wheeled motorcycle, characterized in that: A three-wheeled motorcycle engine is equipped with an externally mounted reversing mechanism according to any one of claims 1 to 9, wherein the axis of the reversing output shaft (401) is arranged facing the center of the rear axle.

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