Motor tricycle engine transmission system and motor tricycle

Abstract

The utility model discloses a motor tricycle engine transmission system which comprises an auxiliary shaft arranged on an engine box body and a transmission shaft which is parallel to the auxiliary shaft and is in transmission connection with the auxiliary shaft. The reversing mechanism comprises an outer box body connected to the exterior of the engine box body and a reversing mechanism output shaft which is arranged on the outer box body, is perpendicular to the transmission shaft and is in transmission connection with the transmission shaft, the output end of the transmission shaft is located in the outer box body, and the axis of the reversing mechanism output shaft is arranged close to the center of the engine and near the center; the utility model further discloses a motor tricycle, the motor tricycle is provided with an engine with the motor tricycle engine transmission system, and the axis of the output shaft of the reversing mechanism is arranged right opposite to the center of a rear axle. According to the motor tricycle engine transmission system and the motor tricycle engine, longitudinal centered output of engine power can be achieved, meanwhile, good maintainability is achieved, and the maintenance cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle transmission system design, in particular to a three-wheeled motorcycle engine transmission system and a three-wheeled motorcycle. Background Art

[0002] Traditional three-wheeled motorcycle engines basically use the secondary shaft of the transmission mechanism as the transmission shaft. The secondary shaft is arranged horizontally on the whole vehicle, and the power is output horizontally. When in use, it is necessary to carry a bevel gear reverse gear on the whole vehicle to realize the reverse gear function, and at the same time convert the lateral power output into longitudinal output, so as to facilitate the connection with the rear axle drive shaft of the whole vehicle. However, due to the influence of the engine's own structure, the bevel gear reverse gear can usually only be arranged on the side of the engine close to the secondary shaft hole, and the output shaft of the bevel gear reverse gear deviates from the center arrangement of the engine body, which is not conducive to the equal length design of the rear axle half shaft, reduces the reliability of the use of the longer half shaft, and also affects the controllability of the whole vehicle, and the transmission efficiency needs to be improved. In the prior art, there is an engine that can realize the longitudinal center arrangement of the engine drive shaft by integrating the reverse gear mechanism and the reversing mechanism inside the engine case. However, since the engine case is also equipped with components such as a transmission mechanism and a clutch, this fully built-in structure of the reverse gear and reversing mechanism increases the complexity of the internal structure of the engine case, making it difficult to design and manufacture. In addition, the integration of all functional mechanisms in one case can easily lead to maintenance difficulties, especially the reversing mechanism, which often requires the use of a relatively easily damaged bevel gear transmission structure. If it is damaged, the engine needs to be disassembled and assembled as a whole, which results in high maintenance costs. In addition, if the reversing mechanism is damaged, it may also cause damage to other components such as the main and secondary shafts, which will also increase maintenance costs.

[0003] Therefore, there is an urgent need to provide a new three-wheeled motorcycle engine transmission system and a three-wheeled motorcycle, which are required to be able to achieve longitudinally centered output of engine power, and at the same time require the engine transmission system and the three-wheeled motorcycle to have good maintainability, which is conducive to reducing maintenance costs, and at the same time require to be conducive to simplifying the engine structure, improving the economy of use, and being able to improve the transmission efficiency to a certain extent. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a three-wheeled motorcycle engine transmission system, which can realize the longitudinal centered output of the engine power. At the same time, the engine transmission system has good maintainability, which is conducive to reducing maintenance costs. At the same time, it is conducive to simplifying the engine structure, improving the economy of use, and can improve the transmission efficiency to a certain extent.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-wheeled motorcycle engine transmission system, including a countershaft arranged in an engine housing and a transmission shaft arranged parallel to the countershaft and transmission-connected; also including a reversing mechanism, the reversing mechanism including an outer housing connected to the outside of the engine housing and a reversing mechanism output shaft arranged in the outer housing and arranged perpendicularly to the transmission shaft and transmission-connected, the output end of the transmission shaft is located in the outer housing, and the axis of the reversing mechanism output shaft is arranged near the center of the engine.

[0006] Furthermore, the reversing mechanism output shaft is connected to the transmission shaft via a bevel gear set, which includes a driving bevel gear coaxially fixed on the transmission shaft and a driven bevel gear coaxially fixed on the reversing mechanism output shaft and meshing with the driving bevel gear.

[0007] Furthermore, the engine case includes a left crankcase, and the rear portion of the left crankcase on the left side extends backward to form a protrusion, the protrusion is provided with a transmission shaft mounting hole and an outer case mounting surface, and the outer case is fixedly mounted on the outer case mounting surface.

[0008] Furthermore, the outer box body includes a shell fixedly mounted on the outer box body mounting surface and a bearing seat fixedly mounted on the rear end of the shell, and the output shaft of the reversing mechanism is rotatably mounted on the bearing seat and extends outward along its own axial direction to be exposed from the bearing seat.

[0009] Furthermore, the output shaft of the reversing mechanism is rotatably connected to the bearing seat through two sets of connecting bearings.

[0010] Furthermore, the driven bevel gear and the output shaft of the reversing mechanism are an integrated structure.

[0011] Furthermore, the transmission shaft and the secondary shaft are connected through a reverse gear set, and the engine case also includes a transmission case cover that is conformably covered on the left side of the left crankcase, a transmission cavity is formed between the transmission case cover and the left crankcase, and the reverse gear set is arranged in the transmission cavity.

[0012] Furthermore, the reverse gear set includes a forward gear driving gear and a reverse gear driving gear which are loosely 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 transmission shaft, and a bridge gear which is rotatably mounted on the engine housing, 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.

[0013] Furthermore, the reverse gear sleeve is slidably fitted on the countershaft through a spline, and a fork groove is provided in the middle of the reverse gear sleeve; the two axial ends of the reverse gear sleeve are respectively provided with reverse gear engaging teeth and forward gear engaging teeth, the reverse gear driving gear is provided with a reverse gear engaging portion for engaging with the reverse gear engaging teeth, and the forward gear driving gear is provided with a forward gear engaging portion for engaging with the forward gear engaging teeth.

[0014] The utility model also provides a three-wheeled motorcycle equipped with an engine having the three-wheeled motorcycle engine transmission system as described above, wherein the axis of the output shaft of the reversing mechanism is arranged directly opposite to the center of the rear axle.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] In the engine transmission system of the three-wheeled motorcycle provided by the utility model, the output shaft of the reversing mechanism is used as the output shaft for the engine to output power outwards at the end, so that the longitudinal center output of the power is realized, so that when the whole vehicle is arranged, it is beneficial to design the equal length of the rear axle half shaft, which is beneficial to improving the controllability of the whole vehicle; at the same time, the reversing mechanism is independent of the outside of the engine box, and the reversing mechanism can be disassembled and repaired separately, without breaking the engine box as a whole, which has good maintainability and is beneficial to reducing the maintenance cost; at the same time, the reversing mechanism is not integrated into the inside of the engine box, which is beneficial to reducing the complexity of the structure and reducing the design The utility model reduces the difficulty of design and manufacturing costs, avoids the influence of the secondary shaft and other components inside the engine case due to the damage of the reversing mechanism, reduces the loss, and is conducive to improving the economical use; at the same time, the transmission shaft serves as the input shaft of the reversing mechanism, simplifies the internal structure of the reversing mechanism, improves the transmission efficiency to a certain extent, and also improves the economical use; the three-wheeled motorcycle provided by the utility model has good maneuverability, is conducive to realizing the equal length setting of the rear axle half shafts, and 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.

[0017] 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

[0018] Figure 1 The cross-sectional structure of the utility model is shown in FIG.

[0019] Figure 2 This is a schematic diagram of the partial cross-section structure of the utility model

[0020] Figure 3 for Figure 2A partial enlarged schematic diagram of point A in the middle

[0021] Figure 4 Schematic diagram of the shaft side structure of the utility model

[0022] Figure 5 Schematic diagram of the left crankcase shaft side structure

[0023] Reference numerals: 1-engine case; 101-left crankcase; 101a-protrusion; 101a-1-transmission shaft mounting hole; 101a-2-outer case mounting surface; 102-transmission case cover; 102a-transmission cavity; 2-countershaft; 3-transmission shaft; 4-reversing mechanism; 401-outer case; 401a-housing; 401b-bearing seat; 402-reversing mechanism output shaft; 403-driving bevel gear; 4 04-driven bevel gear; 405-connecting bearing; 5-reverse gear set; 501-forward gear driving gear; 501a-forward gear meshing part; 502-reverse gear driving gear; 502a-reverse gear meshing part; 503-reverse gear sliding sleeve; 503a-fork groove; 503b-reverse gear engaging tooth; 503c-forward gear engaging tooth; 504-forward gear driven gear; 505-reverse gear driven gear; 506-bridge gear. DETAILED DESCRIPTION

[0024] 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.

[0025] It should be noted that, unless otherwise specified, the directional terms such as "rear end", "rear", "left", "right", "top", "rear", "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.

[0026] See also Figure 1-5The present embodiment discloses a three-wheeled motorcycle engine transmission system, comprising a countershaft 2 arranged in an engine housing 1 and a transmission shaft 3 arranged parallel to and transmission-connected with the countershaft 2, wherein the countershaft 2 and the transmission shaft 3 are transmission-connected via a gear pair, wherein the countershaft 2 is a transmission mechanism countershaft integrated in the engine housing 1; and further comprising a reversing mechanism 4, wherein the reversing mechanism 4 comprises an outer housing 401 connected to the outside of the engine housing 1 and a reversing mechanism output shaft 402 arranged perpendicularly to and transmission-connected with the outer housing 401 and transmission-connected with the transmission shaft 3, wherein the transmission shaft 3 and the reversing mechanism output shaft 402 are connected via a cone The gear set realizes transmission connection, the output end of the transmission shaft 3 is located in the outer box body 401, and the axis of the reversing mechanism output shaft 402 is arranged near the center of the engine and near the center. The arrangement near the center of the engine and near the center also 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, and can be determined according to the position that can be aligned with the center of the rear axle when the whole vehicle is arranged; of course, the engine transmission system also includes a heat engine, a clutch, a speed change mechanism, etc., which can be designed with reference to the existing three-wheeled motorcycle engine, and will not be repeated here;

[0027] In the above structural design, the reversing mechanism output shaft 402 is used as the output shaft for the engine to output power outward at the end, which realizes the longitudinal center output of power, so that when the whole vehicle is arranged, it is beneficial to design the equal length of the rear axle half shaft, which is beneficial to improve the controllability of the whole vehicle; at the same time, the reversing mechanism is independent of the outside of the engine case 1, and the reversing mechanism 4 can be disassembled and repaired separately, without the need to break the engine case 1 as a whole, which has good maintainability and helps to reduce maintenance costs; at the same time, the reversing mechanism 4 is not integrated into the engine case 1, which helps to reduce the complexity of the structure, reduce the difficulty of design, and help to reduce the design and manufacturing costs. It can also avoid the impact of damage to the reversing mechanism 4 on the auxiliary shaft and other components inside the engine case 1, reduce losses, and help improve economic efficiency. At the same time, the output end of the transmission shaft 3 is located in the outer case and serves as the input shaft of the reversing mechanism 4, which simplifies the internal structure of the reversing mechanism 4, improves the transmission efficiency to a certain extent, and improves economic efficiency. Specifically, the transmission shaft 3 is used as the input shaft of the reversing mechanism 4, which can eliminate the bearings separately designed on the input shaft of the reversing mechanism in the traditional bevel gear reversing mechanism, reduce the number of bearings used, and provide economy while reducing friction losses and improving transmission efficiency.

[0028] In this embodiment, the reversing mechanism output shaft 402 is connected to the transmission shaft 3 through a bevel gear set, and the bevel gear set includes a driving bevel gear 403 coaxially fixed on the transmission shaft 3 and a driven bevel gear 404 coaxially fixed on the reversing mechanism output shaft 402 and meshing with the driving bevel gear 403; the "coaxial fixation" mentioned here can be achieved by key fixation, spline fixation, flange fixation, pin fixation, etc. In other embodiments, the gear and the shaft can also be an integrated structure. Specifically, the driving bevel gear 403 and the transmission shaft 3 are fixed by splines, and the driven bevel gear 404 and the reversing mechanism output shaft 402 are an integrated structure; in this structural design, the power output reversing is achieved by adopting a bevel gear set structure, the structure is simple, and the transmission is smooth and reliable.

[0029] In this embodiment, the engine case 1 includes a left crankcase 101, and 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 transmission shaft mounting hole 101a-1 and an outer case mounting surface 101a-2, and the outer case 401 is fixedly mounted on the outer case mounting surface 101a-2; specifically, the transmission shaft 3 is mounted in the transmission shaft mounting hole 101a-1 through a bearing, and the outer case mounting surface 101a-2 is preferably a plane, and the outer case mounting surface 101a-2 is provided with a mounting hole, and the outer case 40 1 is mounted on the outer case mounting surface 101a-2 by bolts; in this structural design, by designing the protrusion 101a on the left crankcase 101, the transmission shaft 3 can be assembled at the protrusion 101a, and a mounting position for the outer case 401 can also be provided, the layout is reasonable, the engine case structure changes little, it is beneficial to further improve the compactness of the structure, and it is beneficial to the layout of the reversing mechanism 4; at the same time, the outer case 401 is directly mounted on the left crankcase 101, that is, the reversing mechanism output shaft 402 of the reversing mechanism 4 is used as the output shaft of the overall power of the engine, which is beneficial to improve the sealing performance and improve the reliability of use.

[0030] In this embodiment, the outer box body 401 includes a shell 401a fixedly installed on the outer box body mounting surface 101a-2 and a bearing seat 401b fixedly installed at the rear end of the shell 401a. Specifically, the shell 401a and the bearing seat 401b are fixedly installed by bolts respectively; the reversing mechanism output shaft 402 is rotatably installed on the bearing seat 401b and extends outward along its own axial direction and then exposed to the bearing seat 401b. It can be understood that the reversing mechanism output shaft 402 is usually installed through bearings; the bearing seat 401b of this structural design is reasonably positioned and has a simple structure. After disassembling the bearing seat 401b, the reversing mechanism output shaft 402 can be replaced, which is conducive to further improving maintainability.

[0031] In this embodiment, the reversing mechanism output shaft 402 is rotatably connected to the bearing seat 401b via two sets of connecting bearings 405; by designing and arranging two sets of connecting bearings 405, the load-bearing capacity can be improved, and the transmission smoothness and stability can be improved.

[0032] In this embodiment, the driven bevel gear 404 and the reversing mechanism output shaft 402 are an integrated structure; the integrated structure has good strength, which is beneficial to improving the service life and the installation accuracy.

[0033] In this embodiment, the transmission shaft 3 is connected to the secondary shaft 2 through the reverse gear set 5. The engine case 1 also includes a transmission case cover 102 which is shaped to cover the left side of the left crankcase 101. The left crankcase 101 and the transmission case cover 102 are fixedly connected by bolts. A transmission cavity 102a is formed between the transmission case cover 102 and the left crankcase 101. The reverse gear set 5 is arranged in the transmission cavity 102a. In this structural design, the power transmission between the transmission shaft 3 and the secondary shaft 2 is completed by the reverse gear set 5, that is, the reverse gear function is integrated inside the engine case, and the engine is arranged in the whole There is no need to set an additional reverse gear structure at the rear of the vehicle, which is beneficial to improving the compactness of the entire vehicle; at the same time, the reverse gear set 5 is set in a separate transmission chamber 102a, which does not affect the internal structural layout of the engine crankcase and has a relatively simple structure; and because the reverse gear set is an additional setting, the original normal driving gear of the motorcycle is retained, which improves the road adaptability of the motorcycle compared to the motorcycle engine in the prior art that reduces the normal gear to obtain a built-in reverse gear mechanism; at the same time, the reverse gear set 5 is set in a separate transmission chamber 102a, which is beneficial to separate it from the shifting operation of the engine speed change mechanism to avoid misoperation.

[0034] In this embodiment, the reverse gear set 5 includes a forward gear driving gear 501 and a reverse gear driving gear 502 which are sleeved on the countershaft 2, a reverse gear sliding sleeve 503 which is synchronously rotated and arranged on the countershaft 2, a forward gear driven gear 504 and a reverse gear driven gear 505 which are synchronously rotated and arranged on the transmission shaft 3, and a bridge gear 506 which is rotatably mounted on the engine housing 1, wherein the bridge gear 506 is meshed with the reverse gear driving gear 502, the reverse gear driven gear 505 is meshed with the bridge gear 506, and the forward gear driven gear 504 is meshed with the forward gear driving gear 501; the reverse gear sliding sleeve 503 can be driven to slide and respectively engage with the forward gear driving gear 501 and the reverse gear driving gear 502 and form a relatively fixed state; the reverse gear sliding sleeve 404 here can be shifted by a conventional reverse gear shift fork, and its driving method is an existing structure, which will not be repeated here; this structural design has reliable transmission, is conducive to realizing the reverse gear function, and has a simple structure.

[0035] In this embodiment, the reverse gear sleeve 503 is slidably fitted on the countershaft 2 through a spline, and a fork groove 503a is provided in the middle of the reverse gear sleeve 503, and the spline fitting installation transmission is reliable; the two axial ends of the reverse gear sleeve 503 are respectively provided with reverse gear engaging teeth 503b and forward gear engaging teeth 503c, and the reverse gear driving gear 502 is provided with a reverse gear engaging portion 502a for engaging with the reverse gear engaging teeth 503b, and the forward gear driving gear 501 is provided with a forward gear engaging portion 501a for engaging with the forward gear engaging teeth 503c; in this structural design, power is transmitted through the meshing of the spline and the combining teeth, and the power transmission is reliable.

[0036] The present embodiment also discloses a three-wheeled motorcycle equipped with an engine having the three-wheeled motorcycle engine transmission system described above, wherein the axis of the reversing mechanism output shaft 402 is arranged directly opposite the center of the rear axle; the three-wheeled motorcycle has good maneuverability, is conducive to achieving equal length setting of the rear axle half shafts, and 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.

[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 transmission system, characterized in that: It comprises a secondary shaft (2) arranged on an engine housing (1) and a transmission shaft (3) arranged parallel to and transmission-connected with the secondary shaft (2); The invention also comprises a reversing mechanism (4), the reversing mechanism (4) comprising an outer casing (401) connected to the outside of the engine casing (1) and a reversing mechanism output shaft (402) arranged on the outer casing (401) and arranged vertically with the transmission shaft (3) and connected in transmission connection, the output end of the transmission shaft (3) being located in the outer casing (401), and the axis of the reversing mechanism output shaft (402) being arranged close to or near the center of the engine.

2. The three-wheeled motorcycle engine transmission system according to claim 1, characterized in that: The reversing mechanism output shaft (402) is connected to the transmission shaft (3) through a bevel gear set, and the bevel gear set comprises a driving bevel gear (403) coaxially fixed on the transmission shaft (3) and a driven bevel gear (404) coaxially fixed on the reversing mechanism output shaft (402) and meshing with the driving bevel gear (403).

3. The three-wheeled motorcycle engine transmission system according to claim 2, characterized in that: The engine case (1) comprises a left crankcase (101), wherein a rear portion of the left crankcase (101) extends backwards to form a protrusion (101a), wherein the protrusion (101a) is provided with a transmission shaft mounting hole (101a-1) and an outer case mounting surface (101a-2), and the outer case (401) is fixedly mounted on the outer case mounting surface (101a-2).

4. The three-wheeled motorcycle engine transmission system according to claim 3, characterized in that: The outer box body (401) comprises a shell (401a) fixedly mounted on the outer box body mounting surface (101a-2) and a bearing seat (401b) fixedly mounted on the rear end of the shell body (401a); the reversing mechanism output shaft (402) is rotatably mounted on the bearing seat (401b) and extends outwardly along its own axial direction to be exposed from the bearing seat (401b).

5. The three-wheeled motorcycle engine transmission system according to claim 4, characterized in that: The reversing mechanism output shaft (402) is rotatably connected to the bearing seat (401b) via two sets of connecting bearings (405).

6. The three-wheeled motorcycle engine transmission system according to claim 4, characterized in that: The driven bevel gear (404) and the reversing mechanism output shaft (402) are an integrated structure.

7. The three-wheeled motorcycle engine transmission system according to claim 3, characterized in that: The transmission shaft (3) and the secondary shaft (2) are connected in transmission via a reverse gear set (5); the engine case (1) further comprises a transmission case cover (102) conformably fitted to the left side of the left crankcase (101); a transmission cavity (102a) is formed between the transmission case cover (102) and the left crankcase (101); and the reverse gear set (5) is arranged in the transmission cavity (102a).

8. The three-wheeled motorcycle engine transmission system according to claim 7, characterized in that: The reverse gear set (5) comprises a forward gear driving gear (501) and a reverse gear driving gear (502) which are loosely sleeved on the secondary shaft (2), a reverse gear sliding sleeve (503) which is synchronously rotatably arranged on the secondary shaft (2), a forward gear driven gear (504) and a reverse gear driven gear (505) which are synchronously rotatably arranged on the transmission shaft (3), and a bridge gear (506) which is rotatably mounted on the engine housing (1), wherein the bridge gear (506) meshes with the reverse gear driving gear (502), the reverse gear driven gear (505) meshes with the bridge gear (506), and the forward gear driven gear (504) meshes with the forward gear driving gear (501); the reverse gear sliding sleeve (503) can be driven to slide and respectively engage with the forward gear driving gear (501) and the reverse gear driving gear (502) to form a relative fixation.

9. The three-wheeled motorcycle engine transmission system according to claim 8, characterized in that: The reverse gear sliding sleeve (503) is slidably fitted on the secondary shaft (2) via a spline, and a fork groove (503a) is provided in the middle of the reverse gear sliding sleeve (503); The two axial ends of the reverse gear sliding sleeve (503) are respectively provided with reverse gear engaging teeth (503b) and forward gear engaging teeth (503c); the reverse gear driving gear (502) is provided with a reverse gear engaging portion (502a) for engaging with the reverse gear engaging teeth (503b); and the forward gear driving gear (501) is provided with a forward gear engaging portion (501a) for engaging with the forward gear engaging teeth (503c).

10. A three-wheeled motorcycle, characterized in that: The three-wheeled motorcycle is equipped with an engine having an engine transmission system according to any one of claims 1 to 9, wherein the axis of the output shaft (402) of the reversing mechanism is arranged directly opposite to the center of the rear axle.

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