Complete engine transmission mechanism and motorcycle

Abstract

The present invention provides an engine transmission mechanism, comprising an output component, a reverse gear component, and a thermal engine component; the output component is transmission-connected to the reverse gear component via a bevel gear component; the reverse gear component comprises a reverse gear housing, within which a reverse gear main shaft and a reverse gear secondary shaft are rotationally connected, the reverse gear main shaft and the reverse gear secondary shaft being transmission-connected via a reverse gear gear set; the output component is further connected to a power take-off component, comprising a power take-off output shaft and a power take-off gear disposed on the power take-off output shaft. The present invention also provides a motorcycle. By providing a thrust assembly, the present invention ensures that the driven bevel gear always maintains good meshing with the driving bevel gear, thereby avoiding damage to the gears due to rigid collisions between the gears, reducing gear damage and increasing gear life, thereby increasing the service life of the engine transmission mechanism and significantly reducing engine maintenance and replacement costs.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a complete engine transmission mechanism and a motorcycle. Background Art

[0002] The engine is the core device that provides driving force for motor vehicles. Its transmission structure is usually composed of a crankshaft and a series of rotating shafts. Each rotating shaft is transmitted through transmission gears and finally transmits momentum to the tires.

[0003] In the engine transmission structure, lightweight, high power density and low noise have always been the goals pursued by transmission gears. Among them, bevel gear transmission is widely used in automobiles, motorcycles, etc. to change the transmission direction due to its advantages such as large overlap, high strength, low noise and simple structure.

[0004] When existing three-wheeled or four-wheeled motorcycles go downhill, they often use the engine's reverse drag to brake. However, due to the low power of the engine, when the vehicle suddenly stops or stalls, the reverse thrust generated by the rear wheel brake and the vehicle's weight will be transmitted to other transmission gears through the bevel gear, causing wear and poor meshing. At the same time, the rigid collision between gears can easily damage the gears, thereby reducing the service life of the engine transmission mechanism and greatly increasing the cost of engine maintenance and replacement. At the same time, the existing engine structure design is relatively cumbersome, and the reverse gear components and speed change components are all located in the engine housing, taking up space. It is difficult to repair and replace parts such as the reverse gear or speed change gear, affecting work efficiency. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention provides an engine transmission mechanism and a motorcycle to solve the technical problems in the related art that when the motorcycle suddenly stops or stalls, the reverse thrust generated by the rear wheel brake and the vehicle weight will be transmitted to other transmission gears through the bevel gear, causing wear and poor meshing, and the rigid collision between the gears will also easily damage the gears.

[0006] The present invention provides an engine transmission mechanism, comprising an output component, a reverse gear component and a heat engine component connected in sequence;

[0007] The output component includes an output housing, an output main shaft and an output counter shaft are rotatably connected in the output housing, the output main shaft and the output counter shaft are transmission-connected via an output gear set, and the output main shaft is transmission-connected to the reverse gear component via a bevel gear component;

[0008] The reverse gear component includes a reverse gear housing, in which a reverse gear main shaft and a reverse gear countershaft are rotatably connected, and the reverse gear main shaft and the reverse gear countershaft are transmission-connected via a reverse gear gear set;

[0009] The heat engine component includes a cylinder head, a cylinder body connected to the cylinder head, a piston assembly disposed in the cylinder body, and a crankshaft drivingly connected to the piston assembly. The crankshaft is disposed in the reverse gear housing and is drivingly connected to the output main shaft.

[0010] Wherein, the output component is also connected to a power take-off component, which includes a power take-off housing, a power take-off output shaft and a power take-off gear arranged on the power take-off output shaft, which are rotatably connected inside the power take-off housing, and the power take-off gear is transmission-connected to the output countershaft.

[0011] Furthermore, the bevel gear component includes:

[0012] Bevel gear housing:

[0013] A driving bevel gear assembly is disposed in the output portion housing, the driving bevel gear assembly comprising a driving bevel gear shaft, one end of the driving bevel gear shaft is sleeved with a driving wheel, the other end of the driving bevel gear shaft is provided with a driving bevel gear, and the driving bevel gear is drivingly connected to a countershaft provided on the reverse gear portion;

[0014] A driven bevel gear assembly is arranged in the output part housing, and the driven bevel gear assembly includes a driven bevel gear shaft. The driven bevel gear shaft is provided with a driven bevel gear meshing with the driving bevel gear. One end of the driven bevel gear shaft is sleeved with a driven wheel, and the driven wheel is transmission-connected to the output part main shaft. The other end of the driving bevel gear shaft is provided with a thrust assembly.

[0015] Furthermore, a protrusion is provided on the driven bevel gear shaft, the thrust cam has a through hole, and a recessed portion matching the protrusion is provided in the through hole, wherein the number of the recessed portions is multiple, and the multiple recessed portions are evenly distributed in the through hole, and the number of the protrusions corresponds to the number of the recessed portions, and the multiple protrusions are evenly distributed on the outer peripheral surface of the driven bevel gear shaft.

[0016] Furthermore, the thrust assembly includes a thrust cam sleeved on the driven bevel gear shaft, a thrust spring is provided at one end of the thrust cam away from the driven bevel gear, and the other end of the thrust spring is fixedly connected to a fixing seat sleeved on the driven bevel gear shaft.

[0017] Furthermore, the thrust cam includes a mounting block, which is arranged at one end of the thrust cam away from the thrust spring; the driven bevel gear includes a mounting groove that cooperates with the mounting block, wherein the number of the mounting grooves is multiple, and the number of the mounting slots corresponds to the number of the mounting blocks.

[0018] Furthermore, the reverse gear group includes forward gears, clutch gears and reverse gear gears sleeved on the reverse gear portion countershaft, the forward gears are connected to one side of the clutch gears, and the reverse gear gears are connected to the other side of the clutch gears.

[0019] Furthermore, the reverse gear component further includes:

[0020] an operating component, one end of the operating component being disposed outside the reverse gear housing and the other end being disposed inside the reverse gear housing;

[0021] A reverse gear shaft, the reverse gear shaft being transmission-connected to the reverse gear main shaft and the reverse gear countershaft respectively through bridge gears;

[0022] A shift fork, one end of which is connected to the operating component, and the other end is connected to the clutch tooth. The operating component drives the clutch tooth to move along the reverse gear countershaft through the shift fork, so that the clutch tooth engages with the forward gear or the reverse gear tooth, so that the engine can move forward or backward.

[0023] Furthermore, the operating component includes:

[0024] A shift fork rod, one end of which is connected to the shift fork and the other end of which is connected to an operating piece, the operating piece being located outside the reverse gear housing; the shift fork rod is provided with a forward slot, a reverse slot and a limit slot;

[0025] A fixing component, comprising a fixing rod penetrating the reverse gear housing, wherein the bottom of the fixing rod is connected to a self-locking steel ball used in conjunction with the forward slot or the reverse slot via a spring;

[0026] The limiting component includes a limiting rod penetrating the reverse gear housing, and one side of the limiting rod is connected to a limiting piece arranged in the limiting groove.

[0027] Furthermore, the output tooth group includes two gear tooth groups, which are respectively sleeved on the outside of the output main shaft and the output secondary shaft. The gear tooth group includes multiple gear teeth, and the multiple gear teeth of the two gear tooth groups correspond one to one, and one pair of the gear teeth in the two gear tooth groups are engaged.

[0028] The present invention also provides a motorcycle comprising the above-mentioned complete engine transmission mechanism.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The complete engine transmission mechanism provided by the present invention incorporates a thrust assembly on the driven bevel gear assembly. Due to the presence of a spring on the thrust assembly, the driven bevel gear always maintains good meshing with the driving bevel gear, thereby preventing damage caused by rigid collisions between the gears, reducing gear damage and improving gear life. Furthermore, the present invention also provides a motorcycle that, by incorporating the complete engine transmission mechanism, extends the motorcycle's service life and significantly reduces engine maintenance and replacement costs.

[0031] The engine transmission mechanism provided by the present invention has an output component and a reverse gear component that are both installed in a housing, thereby making the engine structure compact, reducing the space occupied by a separate reverse gear mechanism, saving costs, and at the same time alleviating safety hazards for users during use, providing convenience for people's travel.

[0032] The engine transmission mechanism provided by the present invention provides a reverse gear component between the output component and the heat engine component, thereby facilitating reverse gear shifting and providing convenience for people's use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the external structure of the transmission mechanism of the engine in one embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the internal structure of the transmission mechanism of the engine in one embodiment of the present invention;

[0035] Figure 3 Schematic diagram of the structure of the transmission mechanism of the engine in one embodiment of the present invention;

[0036] Figure 4 1 is a schematic diagram of the main structure of a thrust cam in one embodiment of the present invention;

[0037] Figure 5 Schematic diagram of the main structure of the driven bevel gear shaft in one embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the structure of the driven bevel gear in one embodiment of the present invention;

[0039] Figure 7 Schematic diagram of the structure of the reverse gear component in one embodiment of the present invention;

[0040] Figure 8 A schematic structural diagram of an output component and a power take-off component in one embodiment of the present invention;

[0041] Description of Figure Numbers:

[0042] Output component 1, output housing 11, output main shaft 12, output countershaft 13, reverse gear component 2, reverse gear housing 21, reverse gear main shaft 22, reverse gear countershaft 23, reverse gear shaft 24, reverse gear bridge tooth 25, shift fork 26, reverse gear gear set 27, forward gear 271, clutch gear 272, reverse gear 273, thermal engine component 3, cylinder head 31, cylinder block 32, piston assembly 33, crankshaft 34, power take-off component 4, power take-off housing 41, power take-off output shaft 42, power take-off gear 43, active bevel gear assembly 5, active bevel gear shaft 51, driving wheel 52, driving bevel gear 53, driven bevel gear assembly 6, driven bevel gear shaft 61, protrusion 611, driven bevel gear 62, mounting groove 622, driven wheel 63, thrust assembly 7, thrust cam 71, mounting block 711, recess 712, thrust spring 72, fixing seat 73, operating component 8, shift fork lever 81, forward groove 811, reverse groove 812, limiting groove 813, operating piece 82, fixing rod 83, self-locking steel ball 84, limiting rod 85, limiting piece 86, gear tooth group 9, gear tooth 91.

[0043] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and beneficial effects of the present invention more clearly understood, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] Example 1

[0046] like Figure 1-2 As shown, an embodiment of the present invention provides an engine transmission mechanism, comprising an output component 1, a reverse gear component 2 and a heat engine component 3 connected in sequence; the output component 1 comprises an output housing 11, an output main shaft 12 and an output secondary shaft 13 are rotatably connected in the output housing 11, the output main shaft 12 and the output secondary shaft 13 are connected by an output gear set, the output main shaft 12 is connected by a bevel gear component to the reverse gear component 2; the reverse gear component 2 comprises a reverse gear The reverse gear housing 21 is rotatably connected to a reverse gear main shaft 22 and a reverse gear countershaft 23, and the reverse gear main shaft 22 and the reverse gear countershaft 23 are transmission-connected via a reverse gear gear set 27; the heat engine component 3 includes a cylinder head 31, a cylinder body 32 connected to the cylinder head 31, a piston assembly 33 disposed in the cylinder body 32, and a crankshaft 34 transmission-connected to the piston assembly 33, the crankshaft 34 being disposed in the reverse gear housing 21 and transmission-connected to the reverse gear main shaft 22;

[0047] Among them, the output component 1 is also connected to the power take-off component 4, and the power take-off component includes a power take-off housing 41. The power take-off housing 41 is rotatably connected to a power take-off output shaft 42 and a power take-off gear 43 arranged on the power take-off output shaft 42. The power take-off gear 43 is transmission-connected to the output part countershaft 13. When the power take-off component 4 is required to output kinetic energy to the outside, the power take-off gear 43 cooperates with the power take-off output shaft 42 to achieve synchronous rotation; when the power take-off component 4 is not required to output kinetic energy to the outside, the power take-off gear 43 and the power take-off output shaft 42 are idling.

[0048] The engine transmission mechanism provided by the present invention comprises an output housing 11, a reverse gear housing 21 and a power take-off housing 41 which are all connected by bolts, thereby facilitating replacement and maintenance. Furthermore, the output component 1, the reverse gear component 2 and the power take-off component 4 are all installed in the housing, thereby making the engine structure compact and saving costs. At the same time, it reduces safety hazards for users during use, thereby providing convenience for people's travel.

[0049] In this embodiment, Figure 3 As shown, the bevel gear components include: a driving bevel gear assembly 5, which is arranged in the output housing 11, the driving bevel gear assembly 5 includes a driving bevel gear shaft 51, one end of the driving bevel gear shaft 51 is provided with a driving wheel 52, the other end of the driving bevel gear shaft 51 is provided with a driving bevel gear 53, the driving bevel gear 53 is transmission-connected to the reverse gear countershaft 23; a driven bevel gear assembly 6, which is arranged in the output housing 11, the driven bevel gear assembly 6 includes a driven bevel gear shaft 61, the driven bevel gear shaft 61 is provided with a driving wheel 52, and the other end of the driving bevel gear shaft 51 is provided with a driving bevel gear 53, and the driving bevel gear 53 is transmission-connected to the reverse gear countershaft 23; The driving bevel gear 53 is meshed with the driven bevel gear 62, and one end of the driven bevel gear shaft 61 is provided with a driven wheel 63, and the driven wheel 63 is transmission-connected to the output main shaft 12. The other end of the driving bevel gear shaft 51 is provided with a thrust assembly 7, and the thrust assembly 7 includes a thrust cam 71 sleeved on the driven bevel gear shaft 61, and the thrust cam 71 is provided with a thrust spring 72 at one end away from the driven bevel gear 62, and the other end of the thrust spring 72 is fixedly connected to a fixing seat 73 sleeved on the driven bevel gear shaft 61.

[0050] The bevel gear transmission mechanism provided by the present invention provides a thrust assembly 7 on the driven bevel gear assembly 6. The thrust spring 72 on the thrust assembly 7 gives thrust to the driven bevel gear 62, so that it can better mesh with the driving bevel gear 53, thereby preventing the driven bevel gear 62 from being subjected to the thrust of the rear wheel and causing a rigid collision with the driving bevel gear 53 during transmission, resulting in damage to the gear.

[0051] In this embodiment, Figure 4-5As shown, a protrusion 611 is provided on the driven bevel gear shaft 61, and the thrust cam 71 has a through hole, in which a recessed portion 712 is provided to cooperate with the protrusion 611, wherein the number of the recessed portions 712 is multiple, and the multiple recessed portions 712 are evenly distributed in the through hole, and the number of the protrusions 611 corresponds to the number of the recessed portions 712, and the multiple protrusions 611 are evenly distributed on the outer peripheral surface of the driven bevel gear shaft 61.

[0052] In this embodiment, the thrust cam 71 includes a mounting block 711, which is arranged at one end of the thrust cam 71 away from the thrust spring 72; the driven bevel gear 62 includes a mounting groove 622 that cooperates with the mounting block 711. Specifically, the mounting blocks 711 are spaced apart along the circumferential direction of the thrust cam 71, and the mounting grooves 622 are spaced apart along the circumferential direction of the thrust cam 71, wherein the number of the mounting grooves 622 is multiple, and the number of the mounting grooves 622 corresponds to the number of the mounting blocks 711. The thrust cam 71 and the driven bevel gear 62 are connected by the coordinated use of the mounting block 711 and the mounting grooves 622.

[0053] Based on the above further improvements, such as Figure 4 and Figure 6 As shown, in this embodiment, the mounting block 711 and the mounting groove 622 can both be arc-shaped structures. The setting of the arc-shaped structure makes the thrust cam 71 and the driven bevel gear 62 fit more tightly, and also reduces the wear of the contact surface between the two.

[0054] Based on the above further improvements, in this embodiment, the output main shaft 12, output countershaft 13, reverse gear main shaft 22, and other components can all be equipped with bearings. The provision of bearings enhances the radial stability of the shafts and reduces the resistance to shaft rotation. The bearings are connected to the shafts using an interference fit, and the number of bearings can be reduced as needed. Furthermore, in this embodiment, the gears on the shafts can be connected via splines, which ensures a more uniform force distribution, reduces stress concentration at the tooth roots, and minimizes strength loss. A larger number of teeth results in a larger total contact area, thus supporting greater loads. The components on the shafts are well aligned with the shafts, providing excellent guidance.

[0055] The working principle of the thrust assembly 7 in the present invention is:

[0056] When the driven bevel gear 62 is subjected to the reverse thrust generated by the rear wheel, the driven bevel gear 62 will be displaced forward, which may result in loose engagement, thereby causing wear when the driven bevel gear 62 and the driving bevel gear 53 are engaged and transmitted. At this time, due to the presence of the thrust spring 72, when the driven bevel gear 62 is pushed forward, the elastic force of the thrust spring 72 can offset its reverse thrust, so that the driven bevel gear 62 always remains stationary, thereby allowing the driven bevel gear 62 and the driving bevel gear 53 to always remain engaged, without generating rigid collisions, thereby reducing the possibility of gear damage.

[0057] In this embodiment, the reverse gear gear group 27 includes a forward gear 271, a clutch gear 272 and a reverse gear gear 273 which are sleeved on the reverse gear part countershaft 23. The forward gear 271 is connected to one side of the clutch gear 272, and the reverse gear gear 273 is connected to the other side of the clutch gear 272. When the clutch gear 272 is engaged with the forward gear 271, the engine moves forward; when the clutch gear 272 is engaged with the reverse gear gear 273, the engine moves backward.

[0058] In this embodiment, Figure 7 As shown, the reverse gear component 2 also includes: an operating component 8, one end of the operating component 8 is arranged outside the reverse gear housing 21, and the other end is arranged inside the reverse gear housing 21; a reverse gear shaft 24, the reverse gear shaft 24 is respectively connected to the reverse gear main shaft 22 and the reverse gear countershaft 23 through the reverse gear bridge teeth 25, and the reverse gear countershaft 23 is provided with a forward tooth 271, a clutch tooth 272 and a reverse gear tooth 273, the forward tooth 271 is connected to one side of the clutch tooth 272, and the reverse gear tooth 273 is connected to the other side of the clutch tooth 272; a shift fork 26, the shift fork 2 One end of 6 is connected to the operating component 8, and the other end is connected to the clutch tooth 272. The operating component 8 drives the clutch tooth 272 to move along the reverse gear countershaft 23 through the shift fork 26, so that the clutch tooth 272 is engaged with the forward tooth 271 or the reverse gear tooth 273, so that the engine can move forward or backward. During specific operation, when shifting is required, when the shift fork 26 is shifted to the left, the clutch tooth 272 is engaged with the forward tooth 271, and the engine moves forward; when the shift fork 26 is shifted to the right, the clutch tooth 272 is engaged with the reverse gear tooth 273, and the engine moves backward.

[0059] In this embodiment, the operating component 8 includes: a shift fork rod 81, one end of the shift fork rod 81 is connected to the shift fork 26, and the other end is connected to an operating piece 82, and the operating piece 82 is located outside the reverse gear housing 21; a forward groove 811, a reverse gear groove 812 and a limit groove 813 are provided on the shift fork rod 81; a fixing component, the fixing component includes a fixing rod 83 that passes through the reverse gear housing 21, and the bottom of the fixing rod 83 is connected to a self-locking steel ball 84 used in conjunction with the forward groove 811 or the reverse gear groove 812 through a spring; a limit component, the limit part The component includes a limit rod 85 that passes through the reverse gear housing 21, and one side of the limit rod 85 is connected to a limit plate 86 arranged in the limit groove 813. During specific operation, the operating plate 82 is toggled to drive the shift fork rod 81 to move left or right, so that the shift fork 26 moves left or right under the drive of the shift fork rod 81, so that the self-locking steel ball 84 is located in the forward groove 811 or the reverse groove 812 of the shift fork rod 81, realizing the shifting of the reverse gear component 2, so that the engine can realize forward or reverse movement, and at the same time, the limit component prevents the self-locking steel ball 84 from slipping out of the forward groove 811 or the reverse groove 812.

[0060] In this embodiment, Figure 8 As shown, the output gear set includes two gear gear sets 9, which are respectively sleeved on the output main shaft 12 and the output countershaft 13. The gear gear sets 9 include a plurality of gear teeth 91. The gear teeth 91 of the two gear gear sets 9 correspond to each other one by one, and one pair of the gear teeth 91 of the two gear gear sets 9 meshes. For example, each gear gear set 9 includes first gear teeth, second gear teeth, third gear teeth, fourth gear teeth, fifth gear teeth, and sixth gear teeth. The first gear teeth of the two gear gear sets 9 correspond to each other, and so on. Each gear corresponds to two gear teeth 91. One pair of the gear teeth 91 of the two gear gear sets 9 meshes. That is, during forward operation of the engine, only one pair of gear teeth 91 is meshed. When the reverse gear is engaged, all six pairs of gear teeth 91 are disengaged, and the reverse gear teeth 273, the clutch teeth 272, and the reverse gear bridge teeth 25 are meshed.

[0061] Example 2

[0062] An embodiment of the present invention provides a motorcycle, including an engine transmission mechanism as described in Example 1. When the thermal engine is working, it drives the crankshaft 34 to rotate, and the crankshaft 34 drives the reverse gear main shaft 22 to rotate through the clutch. The reverse gear main shaft 22 can selectively directly drive the reverse gear main shaft 22 to rotate through the clutch teeth 272 or indirectly drive the reverse gear secondary shaft 23 to rotate through the reverse gear shaft 24, thereby achieving normal power output or reverse gear output; the reverse gear secondary shaft 23 is connected to the output main shaft 12 of the output component 1 through a bevel gear component, and the output main shaft 12 is connected to the output secondary shaft 13 through multiple output gear groups, and is transmitted through the gear gear group 9 to achieve gear shifting; the gear teeth 9 on the output main shaft 12 are connected to the power take-off gear 43, and the power take-off gear 43 can drive the power take-off output shaft 42 to output power to the outside, such as the vehicle's hydraulic system output power.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An engine transmission mechanism, characterized in that: It includes an output component, a reverse gear component and a thermal engine component connected in sequence; The output component includes an output housing, an output main shaft and an output counter shaft are rotatably connected in the output housing, the output main shaft and the output counter shaft are transmission-connected via an output gear set, and the output main shaft is transmission-connected to the reverse gear component via a bevel gear component; The reverse gear component includes a reverse gear housing, in which a reverse gear main shaft and a reverse gear countershaft are rotatably connected, and the reverse gear main shaft and the reverse gear countershaft are transmission-connected via a reverse gear gear set; The heat engine component includes a cylinder head, a cylinder body connected to the cylinder head, a piston assembly disposed in the cylinder body, and a crankshaft drivingly connected to the piston assembly. The crankshaft is disposed in the reverse gear housing and is drivingly connected to the output main shaft. The output component is further connected to a power take-off component, which includes a power take-off housing, a power take-off output shaft and a power take-off gear arranged on the power take-off output shaft, which are rotatably connected in the power take-off housing, and the power take-off gear is drivingly connected to the output countershaft; The bevel gear component comprises: A driving bevel gear assembly is disposed in the output portion housing, the driving bevel gear assembly comprising a driving bevel gear shaft, one end of the driving bevel gear shaft is sleeved with a driving wheel, the other end of the driving bevel gear shaft is provided with a driving bevel gear, and the driving bevel gear is drivingly connected to the reverse gear portion countershaft; A driven bevel gear assembly is disposed in the output housing, the driven bevel gear assembly comprising a driven bevel gear shaft, the driven bevel gear shaft being provided with a driven bevel gear meshing with the driving bevel gear, one end of the driven bevel gear shaft being sleeved with a driven wheel, the driven wheel being transmission-connected to the output main shaft, and the other end of the driving bevel gear shaft being provided with a thrust assembly; The thrust assembly includes a thrust cam sleeved on the driven bevel gear shaft, a thrust spring is provided at one end of the thrust cam away from the driven bevel gear, and the other end of the thrust spring is fixedly connected to a fixing seat sleeved on the driven bevel gear shaft.

2. The complete engine transmission mechanism according to claim 1, wherein: A protrusion is provided on the driven bevel gear shaft, and the thrust cam has a through hole. A recessed portion matching the protrusion is provided in the through hole, wherein the number of the recessed portions is multiple, and the multiple recessed portions are evenly distributed in the through hole, and the number of the protrusions corresponds to the number of the recessed portions, and the multiple protrusions are evenly distributed on the outer circumferential surface of the driven bevel gear shaft.

3. The complete engine transmission mechanism according to claim 1 or 2, characterized in that: The thrust cam includes a mounting block, which is arranged at one end of the thrust cam away from the thrust spring; the driven bevel gear includes a mounting groove that cooperates with the mounting block, wherein the number of the mounting grooves is multiple, and the number of the mounting grooves corresponds to the number of the mounting blocks.

4. The complete engine transmission mechanism according to claim 1, wherein: The reverse gear group includes forward gears, clutch gears and reverse gear gears sleeved on the reverse gear portion countershaft. The forward gears are connected to one side of the clutch gears, and the reverse gear gears are connected to the other side of the clutch gears.

5. The complete engine transmission mechanism according to claim 4, wherein: The reverse gear component also includes: an operating component, one end of the operating component being disposed outside the reverse gear housing and the other end being disposed inside the reverse gear housing; A reverse gear shaft, the reverse gear shaft being transmission-connected to the reverse gear main shaft and the reverse gear countershaft respectively through reverse gear bridge teeth; A shift fork, one end of which is connected to the operating component, and the other end is connected to the clutch tooth. The operating component drives the clutch tooth to move along the reverse gear countershaft through the shift fork, so that the clutch tooth engages with the forward gear or the reverse gear tooth, so that the engine can move forward or backward.

6. The complete engine transmission mechanism according to claim 5, wherein: The operating components include: A shift fork rod, one end of which is connected to the shift fork and the other end of which is connected to an operating piece, the operating piece being located outside the reverse gear housing; the shift fork rod is provided with a forward slot, a reverse slot and a limit slot; A fixing component, comprising a fixing rod penetrating the reverse gear housing, wherein the bottom of the fixing rod is connected to a self-locking steel ball used in conjunction with the forward slot or the reverse slot via a spring; The limiting component includes a limiting rod penetrating the reverse gear housing, and one side of the limiting rod is connected to a limiting piece arranged in the limiting groove.

7. The complete engine transmission mechanism according to claim 1, wherein: The output tooth group includes two gear tooth groups, which are respectively sleeved on the output main shaft and the output secondary shaft. The gear tooth group includes multiple gear teeth, and the multiple gear teeth of the two gear tooth groups correspond one to one, and one pair of the gear teeth in the two gear tooth groups are engaged.

8. A motorcycle, characterized in that: It comprises the complete engine transmission mechanism as described in any one of claims 1 to 7.

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