Gear shifting mechanism of motorcycle

Abstract

The utility model relates to a gear shifting mechanism of a motorcycle, which comprises a main shaft, an auxiliary shaft and a first gear shifting lever shaft which are parallel to one another, the auxiliary shaft is a power output shaft, the first gear shifting lever shaft is connected with a gear shifting drum through a ratchet mechanism, and the gear shifting mechanism further comprises a second gear shifting lever shaft which is perpendicular to the first gear shifting lever shaft. One end of the second gear lever shaft is connected with the gear lever, and the other end of the second gear lever shaft is provided with a deflector rod; a shifting block is arranged on the first gear shift lever shaft, the shifting rod is connected with the shifting block, the second gear shift lever shaft rotates to drive the shifting rod to shift the shifting block, and the shifting block drives the first gear shift lever shaft to rotate around the axis of the first gear shift lever shaft. According to the scheme, the second gear shift lever shaft is additionally arranged at the front end of the transmission direction of the first gear shift lever shaft, reversing is achieved on the second gear shift lever shaft, the structure is simple, and the device is suitable for motorcycles with horizontally-opposed internal combustion engines.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycles, in particular to a gear shifting mechanism of a motorcycle. Background Art

[0002] The shifting principle of the motorcycle shift mechanism is summarized as follows: the external shift lever is connected to the shift lever shaft, and the other end of the shift lever shaft is connected to the ratchet mechanism. The ratchet mechanism rotates the shift drum at a specific angle, and a groove of a special shape is formed on the shift drum. One end of the shift fork slides with the groove of the shift drum. As the shift drum rotates, the shift fork drives the shift fork to slide along the groove. The change in the curvature of the groove forces the shift fork to move. The other end of the shift fork is connected to the sliding gear, so that the rotation of the shift drum will drive the translation of the sliding gear to switch the meshing state with the free gear on the countershaft (output shaft), and output with different transmission ratios to achieve shifting.

[0003] In a motorcycle with a horizontally opposed internal combustion engine, the shift lever shaft, main shaft (input shaft), and secondary shaft (output shaft) in the internal combustion engine are arranged in parallel. After being installed on the motorcycle body, the secondary shaft is arranged along the front and rear direction of the body, so that it is convenient for the driver to step on the shift lever from the side of the body to drive the shift lever shaft to rotate to achieve gear shifting operations. It is necessary to improve the setting of the shift lever shaft so that it can drive the rotation of the rear ratchet mechanism and subsequent mechanisms after the input end is reversed. Summary of the invention

[0004] In order to solve the above problems, the utility model aims to provide a gear shifting mechanism for a motorcycle, which adds a first-stage reversing structure at the input end of the gear lever shaft.

[0005] A shift mechanism for a motorcycle comprises a main shaft, a secondary shaft and a first shift rod shaft which are parallel to each other, the secondary shaft being a power output shaft, the first shift rod shaft being connected to a shift drum via a ratchet mechanism, and the second shift rod shaft being arranged perpendicular to the first shift rod shaft, one end of the second shift rod shaft being connected to a shift rod, and the other end of the second shift rod shaft being provided with a shift lever; a shift block being provided on the first shift rod shaft, the shift lever being connected to the shift block, the second shift rod shaft rotating to drive the shift lever to shift the shift block, and the shift block driving the first shift rod shaft to rotate around its axis.

[0006] Preferably, the shift rod is arranged radially along the second shift rod shaft, a first connecting hole is provided on the second shift rod shaft, and the shift rod is connected to the first connecting hole by interference fit.

[0007] As an optional solution, one end of the shift rod is a ball head structure, a spherical groove is formed on the shift block, and the ball head structure of the shift rod is located in the spherical groove.

[0008] As another alternative, the shift lever and the shift block are held against each other.

[0009] Preferably, a return mechanism is provided on the first shift lever shaft, and the return mechanism includes an elastic member, and the rotation of the first shift lever shaft drives the elastic member to undergo elastic deformation.

[0010] As an optional solution, the elastic member is a spring.

[0011] Due to the above structure, the first shift lever shaft can be arranged in the original shift lever shaft mode, and the ratchet mechanism, shift drum, etc. at the rear transmission end can also be arranged in the original mode. By adding a second shift lever shaft at the front end of the first shift lever shaft in the transmission direction, the second shift lever shaft can be used for reversing, and the structure is simple, which is suitable for motorcycles with horizontally opposed internal combustion engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of this application.

[0013] Reference numerals:

[0014] Horizontally opposed internal combustion engine 1 , first shift lever shaft 51 , shift rod 511 , second shift lever shaft 52 , shift block 521 , elastic member 522 . DETAILED DESCRIPTION

[0015] The embodiments of the present utility model are described in detail below.

[0016] like Figure 1 As shown, this embodiment provides a shift mechanism for a motorcycle, which is suitable for a horizontally opposed internal combustion engine 1 of a motorcycle, and includes a main shaft, a secondary shaft and a first shift rod shaft 51 parallel to each other, wherein the secondary shaft is a power output shaft, and the first shift rod shaft 51 is connected to a shift drum through a ratchet mechanism; it also includes a second shift rod shaft 52, which is vertically arranged with the first shift rod shaft 51, one end of the second shift rod shaft 52 is connected to a shift rod, and the other end of the second shift rod shaft 52 is provided with a shift lever 511; a shift block 521 is provided on the first shift rod shaft 51, and the shift rod 511 is connected to the shift block 521, and the rotation of the second shift rod shaft 52 drives the shift rod 511 to shift the shift block 521, and the shift block 521 drives the first shift rod shaft 51 to rotate around its axis.

[0017] The above-mentioned shift mechanism operates as follows: the external shift lever drives the second shift lever shaft 52 to rotate, and the second shift lever shaft 52 drives the shift lever 511 thereon, and the shift lever 511 shifts the shift block 521 to one side; the shift block 521 drives the first shift lever shaft 51 to rotate, and the first shift lever shaft 51 drives the ratchet mechanism to rotate the shift drum at a specific angle. A groove of a special shape is formed on the shift drum, and one end of the shift fork slides with the groove of the shift drum. As the shift drum rotates, the shift fork drives the shift fork to slide along the groove. The change in the curvature of the groove forces the shift fork to move. The other end of the shift fork is connected to the sliding gear, so that the rotation of the shift drum will drive the sliding gear to translate to switch the meshing state with the free gear on the countershaft, and output with different transmission ratios to achieve shifting.

[0018] In this embodiment, the first shift lever shaft 51 and the second shift lever shaft 52 are perpendicular to each other, the shift lever 511 is arranged along the radial direction of the second shift lever shaft 52, and the shift block 521 is arranged along the radial direction of the first shift lever shaft 51, so that the first shift lever shaft 51 and the second shift lever shaft 52 can be switched by the cooperation of the shift block 521 and the shift lever 511. In addition, the cooperation structure of the shift lever 511 and the shift block 521 does not form a self-locking for the first and second shift lever shafts relative to the reversal of the gear set, which is conducive to the first and second shift lever shafts returning to the normal position after the gear shift is completed.

[0019] Preferably, a first connecting hole is provided on the second shift lever shaft 52, and the shift rod 511 is connected to the first connecting hole by interference fit. By means of interference fit, there is no need to additionally set a connecting piece between the shift lever 511 and the second shift lever shaft 52, and the overall structure is more concise and the connection structure is reliable. As an optional embodiment, one end of the shift lever 511 is a ball head structure, and a spherical groove is formed on the shift block 521, and the ball head structure of the shift lever 511 is located in the spherical groove. Through the cooperation of the ball head and the spherical groove, the shift lever 511 and the shift block 521 can always be connected. In another optional embodiment, the shift lever 511 and the shift block 521 are kept in contact with each other, and the two are in contact and matched, and the connection structure is simple, and the transmission between the shift lever 511 and the shift block 521 can also be realized.

[0020] The first shift lever shaft 51 is provided with a return mechanism, which includes an elastic member 522. The rotation of the first shift lever shaft 51 drives the elastic member 522 to undergo elastic deformation. After the external force acting on the shift lever is removed, the return force of the elastic member 522 drives the first shift lever shaft 51, the second shift lever shaft 52 and the shift lever to return to the original position. Optionally, a spring is used as the elastic member 522, and the number of springs required can be selected according to actual needs.

[0021] and elastic coefficient.

[0022] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A shift mechanism for a motorcycle, comprising a main shaft, a secondary shaft and a first shift lever shaft parallel to each other, wherein the secondary shaft is a power output shaft, and the first shift lever shaft is connected to a shift drum through a ratchet mechanism, characterized in that: It also includes a second shift lever shaft, which is arranged perpendicular to the first shift lever shaft, one end of the second shift lever shaft is connected to the shift lever, and the other end of the second shift lever shaft is provided with a shift rod; the first shift lever shaft is provided with a shift block, the shift rod is connected to the shift block, and the rotation of the second shift lever shaft drives the shift rod to shift the shift block, and the shift block drives the first shift lever shaft to rotate around its axis.

2. A motorcycle gear shifting mechanism according to claim 1, characterized in that: The shift rod is arranged radially along the second shift rod shaft, a first connecting hole is arranged on the second shift rod shaft, and the shift rod is connected to the first connecting hole by interference fit.

3. A motorcycle gear shifting mechanism according to claim 1, characterized in that: One end of the shifting rod is a ball head structure, a spherical groove is formed on the shifting block, and the ball head structure of the shifting rod is located in the spherical groove.

4. A motorcycle gear shifting mechanism according to claim 1, characterized in that: The lever and the block remain in contact with each other.

5. The gear shifting mechanism for a motorcycle according to claim 1, characterized in that: The first shift lever shaft is provided with a return mechanism, and the return mechanism includes an elastic member. The rotation of the first shift lever shaft drives the elastic member to undergo elastic deformation.

6. A motorcycle gear shifting mechanism according to claim 5, characterized in that: The elastic member is a spring.

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