Straddle-type motorcycle with CVT engine shaft transmission

Abstract

A straddle-type motorcycle with CVT engine shaft transmission, the motorcycle comprising a frame (1) and a rear wheel (2), which is arranged at the rear of the frame (1), wherein the frame (1) is further provided with a CVT engine (0) and a transmission assembly (3); the transmission assembly (3) comprises a transmission gear set (31), a transmission shaft (32) and a bevel gear set (33); and the transmission gear set (31) is connected to an output shaft (01) of the CVT engine (0) and one end of the transmission shaft (32) for transmission, and the other end of the transmission shaft (32) is connected to a rear axle (21) of the rear wheel (2) by means of the bevel gear set (33) for transmission, such that the CVT engine (0) drives the rear wheel (2) to rotate.

Description

A straddle-type motorcycle with CVT engine shaft transmission Technical Field

[0001] The invention belongs to the technical field of motorcycles, and more particularly to a straddle-type motorcycle with a CVT engine shaft drive. Background Art

[0002] A motorcycle is a two-wheeled or three-wheeled vehicle powered by a gasoline engine and steered by handlebars. It is light, flexible and fast. Among them, straddle-type motorcycles have been loved by straddle-type motorcycle enthusiasts all over the world for more than a hundred years because of their domineering style.

[0003] However, all current straddle-type motorcycles are manual transmission modes. The complex manual transmission mode not only affects the driver's experience but also often affects the driver's driving safety. In particular, it is difficult for beginners to use the manual transmission mode of the motorcycle, which is not convenient for beginners to drive.

[0004] Summary of the Invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a straddle-type motorcycle with a CVT engine shaft drive, so as to improve the safety and convenience of the straddle-type motorcycle.

[0006] The present invention provides the following technical solution: a straddle-type motorcycle with a CVT engine shaft drive, comprising a frame and a rear wheel arranged at the rear of the frame, the frame also being provided with a CVT engine and a transmission assembly, the transmission assembly comprising a transmission gear set, a transmission shaft and a bevel gear set, the transmission gear set being respectively connected to the output shaft of the CVT engine and one end of the transmission shaft for transmission, the other end of the transmission shaft being connected to the rear wheel axle of the rear wheel through the bevel gear set for transmission, so that the CVT engine drives the rear wheel to rotate.

[0007] As an improvement, the transmission gear set includes an output gear, a transfer gear and a transmission gear that mesh with each other in sequence. The output gear is set on the output shaft for synchronous rotation, and the transmission gear is set at one end of the transmission shaft for synchronous rotation.

[0008] As an improvement, the output gear, the intermediate gear and the transmission gear are rotatably accommodated in a mounting shell.

[0009] As an improvement, the diameters of the output gear, the intermediate gear and the transmission gear decrease successively, and the number of teeth decreases successively.

[0010] As an improvement, the bevel gear set includes a transverse bevel gear and a longitudinal bevel gear. The transverse bevel gear is arranged on the rear wheel shaft, and the longitudinal bevel gear is arranged at the end of the transmission shaft. The transverse bevel gear and the longitudinal bevel gear are engaged with each other for transmission.

[0011] As an improvement, universal joints are provided at both ends of the transmission shaft, and the transmission shaft is externally connected to the transmission gear set and the bevel gear set respectively through the universal joints.

[0012] As an improvement, the transmission shaft includes an outer shaft and an inner shaft which are sleeved on each other, and the lengths of the outer shaft and the inner shaft are changed by axial displacement.

[0013] The beneficial effects of the present invention are as follows: a continuously variable speed driving mode is realized by adopting a CVT engine plus a transmission assembly, thereby eliminating the complicated and chaotic manual shifting. Most of the reasons why novices fall off their motorcycles are due to manual shifting. The continuously variable speed driving mode makes it easier for novices to get started, thereby improving the safety of riding a straddle-type motorcycle and the driving experience of a straddle-type motorcycle, and making the operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic diagram of the three-dimensional structure of the straddle-type motorcycle of the present invention with some components removed.

[0015] FIG2 is an enlarged view of point A in FIG1 .

[0016] FIG3 is a schematic diagram of the three-dimensional structure of the straddle-type motorcycle of the present invention. DETAILED DESCRIPTION

[0017] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] As shown in Figures 1, 2, and 3, a specific embodiment of a straddle-type motorcycle with a CVT engine shaft drive according to the present invention is shown. This embodiment comprises a frame 1 and a rear wheel 2 disposed at the rear of the frame 1. The frame 1 is also provided with a CVT engine 0 and a transmission assembly 3. The transmission assembly 3 comprises a transmission gear set 31, a transmission shaft 32, and a bevel gear set 33. The transmission gear set 31 is connected to the output shaft 01 of the CVT engine 0 and one end of the transmission shaft 32, respectively, for transmission. The other end of the transmission shaft 32 is connected to the rear wheel axle 21 of the rear wheel 2 via the bevel gear set 33 for transmission, so that the CVT engine 0 drives the rear wheel 2 to rotate.

[0019] When the present invention is in use, the frame 1 is a frame-type structure that spans the front and rear axles of the motorcycle, commonly known as a beam. The frame 1 is a prior art and will not be described in detail here. The motorcycle itself also includes some other functional modules, such as assembly components, front wheels, electrical connectors, etc., which should be technologies well known to those skilled in the art and are not innovative parts of the present invention, and will not be described in detail here. The CVT engine 0 can improve driving comfort performance. The CVT engine 0 has no gears, the speed change process is continuous and linear, and there is no shift shock when speeding up. The CVT engine 0 is a prior art and will not be described in detail here. After the CVT engine 0 is integrated into the straddle-type motorcycle, it is necessary to complete the transmission of power through a brand-new transmission structure to drive the rear wheel 2 to rotate. As the core innovation of the present invention, a transmission assembly 3 is designed to match the layout direction of the output shaft 01 of the CVT engine 0. The position of the CVT engine 0 and the rear wheel 2 can be regarded as a three-dimensional space with an X-axis, a Y-axis, and a Z-axis. Here, the front-to-back direction of the motorcycle is set as the X-axis, the up-down direction of the motorcycle is set as the Y-axis, and the left-to-right direction of the motorcycle is set as the Z-axis. During structural design, the output shaft 01 of the CVT engine 0, the transmission assembly 3, and the rear wheel axle 21 of the rear wheel 2 can be set at the same height, thereby ignoring the Y-axis, reducing the design difficulty. In the X-axis direction, the design of the transmission shaft 32 forms a good front-to-back transmission structure connection and transmission. In the Z-axis direction, the design of the transmission gear set 31 makes the position of the output shaft 01 of the CVT engine 0 correspond to the end of the upper transmission shaft 32, thereby enabling effective transmission. The design of the bevel gear set 33 converts the rotation direction of the transmission shaft 32 into the rotation direction of the rear wheel 2, achieving effective transmission. Moreover, the design of the overall transmission assembly 3 is more stable than the traditional chain or belt transmission method, with less power loss and less noise.

[0020] As an improved specific embodiment, the transmission gear set 31 includes an output gear 311, a transfer gear 312 and a transmission gear 313 that are meshed and transmitted in sequence. The output gear 311 is set on the output shaft 01 for synchronous rotation, and the transmission gear 313 is set at one end of the transmission shaft 32 for synchronous rotation.

[0021] As shown in Figures 1 and 2, the transfer gear 312 cooperates with the output gears 311 and the transmission gear 313 on both sides to form a transmission match, thereby realizing power transmission when the output shaft 01 of the CVT engine 0 and the transmission shaft 32 are not coaxially corresponding, that is, adjusting the power transmission position when the Z axis is not aligned, thereby reducing the difficulty of arranging the CVT engine 0.

[0022] As an improved specific implementation manner, the output gear 311 , the transfer gear 312 and the transmission gear 313 are rotatably accommodated in a mounting shell 02 .

[0023] As shown in FIG2 , the outer shell on one side of the mounting shell 02 is removed to facilitate observation of the output gear 311 , the intermediate gear 312 and the transmission gear 313 inside. The complete mounting shell 02 not only effectively limits the output gear 311 , the intermediate gear 312 and the transmission gear 313 to ensure the meshing transmission effect of the gear set, but also provides good protection for the gear set.

[0024] As an improved specific implementation, the diameters of the output gear 311 , the transfer gear 312 and the transmission gear 313 decrease successively, and the number of teeth decreases successively.

[0025] As shown in FIG2 , by designing the gear diameters and the number of teeth to decrease successively, the transmission ratio between the gears is improved, thereby improving the rotation efficiency of the CVT engine 0 driving the transmission shaft 32 and the rear wheels 2 .

[0026] As an improved specific embodiment, the bevel gear set 33 includes a transverse bevel gear 331 and a longitudinal bevel gear 332. The transverse bevel gear 331 is arranged on the rear wheel shaft 21, and the longitudinal bevel gear 332 is arranged at the end of the transmission shaft 32. The transverse bevel gear 331 and the longitudinal bevel gear 332 are engaged with each other for transmission.

[0027] As shown in Figures 1 and 2, by relying on the transmission structure design in which the transverse bevel gear 331 and the longitudinal bevel gear 332 are meshed with each other, the rotation direction of the transmission shaft 32 is converted into the rotation direction of the rear wheel 2, thereby achieving effective transmission.

[0028] As an improved specific implementation, universal joints 320 are further provided at both ends of the transmission shaft 32 , and the transmission shaft 32 is externally connected to the transmission gear set 31 and the bevel gear set 33 through the universal joints 320 .

[0029] As shown in Figures 1 and 2, the design of the universal joint 320 makes the angles at both ends of the transmission shaft 32 equal, thereby ensuring that the instantaneous angular velocity of the output shaft and the input shaft are always equal, improving transmission stability, reducing power loss, and reducing the load and wear of the transmission shaft 32 under long-term use.

[0030] As an improved specific implementation, the transmission shaft 32 includes an outer shaft 321 and an inner shaft 322 that are sleeved with each other, and the lengths of the outer shaft 321 and the inner shaft 322 change through axial displacement.

[0031] As shown in Figures 1 and 2, through further structural design of the outer shaft 321 and the inner shaft 322, on the one hand, it is convenient to complete the docking installation of the transmission shaft 32 with the front and rear structures during assembly and maintenance, and on the other hand, in conjunction with the universal joint 320, the real-time length change of the transmission shaft 32 when the angle changes.

[0032] As an improved embodiment, a protective cover 4 is further provided outside the transmission shaft 32 and bevel gear assembly 33 to better protect the entire transmission assembly 3, preventing wear and tear from debris, improving safety, and extending the overall service life. Furthermore, the protective cover 4 and the vehicle frame 1 can be configured with matching limiting and accommodation structures based on the structure of the transmission shaft 32, universal joint 320, and bevel gear assembly 33, improving overall operational stability.

[0033] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that improvements and modifications that do not depart from the principles of the present invention are within the scope of protection of the present invention.

Claims

1. A straddle-type motorcycle with a CVT engine shaft drive, comprising a frame (1) and a rear wheel (2) arranged at the rear of the frame (1), characterized in that: The frame (1) is also provided with a CVT engine (0) and a transmission assembly (3), wherein the transmission assembly (3) comprises a transmission gear set (31), a transmission shaft (32) and a bevel gear set (33), wherein the transmission gear set (31) is respectively connected to an output shaft (01) of the CVT engine (0) and one end of the transmission shaft (32) for transmission, and the other end of the transmission shaft (32) is connected to a rear wheel shaft (21) of a rear wheel (2) through the bevel gear set (33) for transmission, so that the CVT engine (0) drives the rear wheel (2) to rotate.

2. A straddle-type motorcycle with CVT engine shaft transmission according to claim 1, characterized in that: The transmission gear set (31) comprises an output gear (311), a transfer gear (312) and a transmission gear (313) which are meshed and transmitted in sequence; the output gear (311) is arranged on an output shaft (01) for synchronous rotation; and the transmission gear (313) is arranged at one end of the transmission shaft (32) for synchronous rotation.

3. A straddle-type motorcycle with CVT engine shaft transmission according to claim 2, characterized in that: The output gear (311), the transfer gear (312) and the transmission gear (313) are rotatably accommodated in a mounting shell (02).

4. A straddle-type motorcycle with CVT engine shaft drive according to claim 2 or 3, characterized in that: The diameters of the output gear (311), the transfer gear (312) and the transmission gear (313) decrease successively, and the number of teeth decreases successively.

5. A straddle-type motorcycle with CVT engine shaft drive according to claim 1, 2 or 3, characterized in that: The bevel gear set (33) comprises a transverse bevel gear (331) and a longitudinal bevel gear (332); the transverse bevel gear (331) is arranged on the rear wheel shaft (21); the longitudinal bevel gear (332) is arranged at the end of the transmission shaft (32); the transverse bevel gear (331) and the longitudinal bevel gear (332) are meshed with each other for transmission.

6. A straddle-type motorcycle with CVT engine shaft drive according to claim 1, 2 or 3, characterized in that: Universal joints (320) are also provided at both ends of the transmission shaft (32), and the transmission shaft (32) is externally connected to a transmission gear set (31) and a bevel gear set (33) respectively through the universal joints (320).

7. A straddle-type motorcycle with CVT engine shaft transmission according to claim 6, characterized in that: The transmission shaft (32) comprises an outer shaft (321) and an inner shaft (322) which are sleeved with each other, and the lengths of the outer shaft (321) and the inner shaft (322) are changed through axial displacement.

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