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CN-224214643-U - Gear shifting structure of motorcycle engine

CN224214643UCN 224214643 UCN224214643 UCN 224214643UCN-224214643-U

Abstract

The utility model belongs to the technical field of motorcycle engines, and relates to a gear shifting structure of a motorcycle engine, which comprises a gear shifting box body, wherein a driving shaft in transmission connection with a crankshaft and an output shaft in transmission connection with a load are arranged in the gear shifting box body, the driving shaft is in transmission connection with the output shaft through a gear shifting mechanism, the gear shifting mechanism comprises a gear set and a shifting fork for changing the connection state of the gear set, a stepping motor is arranged on the outer side of the gear shifting box body, a crank is sleeved on a motor shaft of the stepping motor, the crank is hinged with one end of a connecting rod, the other end of the connecting rod is hinged with the shifting fork, the shifting fork is glidingly arranged on a guide rod, the guide rod is parallel to the driving shaft and the output shaft, and the stepping motor drives the shifting fork to glide along the axial direction of the guide rod so as to complete gear shifting action. The gear shifting structure of the motorcycle engine provided by the utility model can realize automatic gear shifting of the motorcycle.

Inventors

  • Li Xintu
  • OUYANG SHAOJI
  • ZHU CHENGZHI
  • YE ZIRONG

Assignees

  • 浙江新霸科技有限公司

Dates

Publication Date
20260508
Application Date
20250523

Claims (6)

  1. 1. The utility model provides a motorcycle engine's gearshift structure, includes gearbox body (1), be provided with in gearbox body (1) drive shaft (2) be connected with the crank drive, with load transmission output shaft (3) be connected, drive shaft (2) are connected through gearshift transmission with output shaft (3), gearshift includes gear train and change gear train connected state's shift fork (4), its characterized in that, the outside of gearbox body (1) is provided with step motor (5), the cover is equipped with crank (6) on step motor (5)'s the motor shaft, crank (6) are articulated with the one end of connecting rod (7), and the other end and the shift fork (4) of connecting rod (7) are articulated, shift fork (4) slide and are set up on guide bar (8), guide bar (8) are with drive shaft (2), output shaft (3) parallel arrangement, step motor (5) drive shift fork (4) are slided along the axial of guide bar (8) in order to accomplish the action of shifting.
  2. 2. A gear shifting structure of a motorcycle engine according to claim 1, characterized in that the shifting fork (4) is connected in a middle groove of the meshing sleeve (9), the meshing sleeve (9) is slidably arranged on the intermediate shaft (10), a first gear (11) and a second gear (12) are sleeved on the intermediate shaft (10) at two sides of the meshing sleeve (9), and the meshing sleeve (9) is driven by the shifting fork (4) to be selectively connected with the first gear (11) and the second gear (12).
  3. 3. A gear shifting structure of a motorcycle engine according to claim 2, characterized in that the inner ring of the engagement sleeve (9) is in spline transmission connection with the intermediate shaft (10), the engagement sleeve (9) is connected with the first gear (11) and the second gear (12) through matched convex blocks and groove structures, and the first gear (11) and the second gear (12) are in rotational connection with the intermediate shaft (10).
  4. 4. A gear shifting structure of a motorcycle engine according to claim 3, characterized in that the driving shaft (2) is provided with driving teeth (13), the driving teeth (13) are meshed with a first gear (11) on the intermediate shaft (10) and a third gear (15) on the transition shaft (14), the intermediate shaft (10) is provided with intermediate teeth (16), the intermediate teeth (16) are meshed with a fourth gear (17) sleeved on the output shaft (3), the transition shaft (14) is provided with transition teeth (18), and the transition teeth (18) are meshed with a second gear (12) on the intermediate shaft (10).
  5. 5. A gear shifting structure of a motorcycle engine according to claim 4, characterized in that the driving shaft (2), the intermediate shaft (10), the transition shaft (14), the output shaft (3) and the guide rod (8) are arranged in parallel, two ends of the driving shaft (2), the intermediate shaft (10), the transition shaft (14) and the output shaft (3) are rotatably connected with the transmission case (1) and supported by bearings, and two ends of the guide rod (8) are fixedly connected with the transmission case (1).
  6. 6. The gear shifting structure of the motorcycle engine according to claim 1, characterized in that a motor mounting groove (19) is formed in the gear box body (1), a motor mounting surface (20) and a motor bearing seat (21) are formed in the gear box body (1) corresponding to the motor mounting groove (19), a motor bearing for supporting a motor shaft is arranged in the motor bearing seat (21), the front end surface of the stepping motor (5) is attached to the motor mounting surface (20), the motor shaft penetrates through the gear box body (1) and is arranged in the motor bearing in a penetrating mode, and the rear end of the stepping motor (5) is fixedly connected with the gear box body (1) through a motor mounting seat (22).

Description

Gear shifting structure of motorcycle engine Technical Field The utility model belongs to the technical field of motorcycle engines, and relates to a gear shifting structure of a motorcycle engine. Background The existing motorcycles generally adopt a mechanical gear shifting structure, and pedal driving gear shifting is needed. The mechanical structure is complex, the production cost is high, the pedal is needed to be used for stepping every time when shifting gears, the force of each person is different, the shifting feeling of different people is different, some people feel inflexible in shifting gears, and some people feel too fast in shifting gears. Chinese utility model CN201884614U (publication day: 2011.06.29) discloses a transmission for an electric motorcycle, which comprises a gearbox body, a gear shifting mechanism and a gear shifting mechanism, wherein the gear shifting mechanism and the gear shifting mechanism are installed in the gearbox body, the gear shifting mechanism and the gear shifting mechanism are respectively located at the lower part and the upper part of the gearbox body, a motor in the gear shifting mechanism is installed at the right part of the gearbox body, and a shell of the motor and the gearbox body are in an integrated structure. The transmission is shifted through a stepping motor, and the gear shifting mechanism comprises a stepping motor, a pinion, a speed changing drum, a large gear, a first gear shifting fork, a second gear shifting fork, a small gear, a large gear, a first gear shifting fork and a second gear shifting fork, wherein the pinion is arranged at the output end of the stepping motor, the large gear is arranged at the end part of the speed changing drum, the first gear shifting fork and the second gear shifting fork are sleeved on the speed changing drum, the pinion is meshed with the large gear, the outer end of the first gear shifting fork stretches into a circumferential groove of the two driven gears, and the outer end of the second gear shifting fork stretches into a circumferential groove of the three-stage driven gear. In actual production, the gear shift of mechanisms such as a gear shift drum is realized by utilizing cam molded lines, and in order to realize accurate gear shift, the processing precision requirement of the gear shift drum is very high, so that the processing difficulty and the processing cost are increased. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a gear shifting structure of a motorcycle engine, which can realize automatic gear shifting of a motorcycle and has the advantages of simple structure, convenient operation, flexible and accurate gear shifting, low processing precision requirement and low cost. In order to solve the technical problems, the aim of the utility model is realized by the following technical scheme: The utility model provides a motorcycle engine's gearshift structure, includes the gearbox body, be provided with the drive shaft of being connected with the crank drive in the gearbox body, with the output shaft of load transmission connection, the drive shaft passes through gearshift transmission with the output shaft and is connected, gearshift includes the shift fork of gear train and change gear train connected state, the outside of gearbox body is provided with step motor, the cover is equipped with the crank on step motor's the motor shaft, the one end of crank and connecting rod articulates, the other end and the shift fork of connecting rod are articulated, the shift fork slides and sets up on the guide bar, guide bar and drive shaft, output shaft parallel arrangement, step motor drive shift fork slides along the axial of guide bar in order to accomplish the action of shifting. In the above-described gear shift structure of a motorcycle engine, the crankshaft is drivingly connected to the drive shaft through the CVT system. In the gear shifting structure of the motorcycle engine, the shifting fork is connected in the middle groove of the meshing sleeve, the meshing sleeve is arranged on the intermediate shaft in a sliding mode, a first gear and a second gear are sleeved on the intermediate shaft on two sides of the meshing sleeve, and the meshing sleeve is driven by the shifting fork to be selectively connected with the first gear and the second gear for transmission. In the gear shifting structure of the motorcycle engine, the inner ring of the meshing sleeve is in transmission connection with the intermediate shaft through the spline, the meshing sleeve is connected with the first gear and the second gear through the matched convex blocks and the groove structure, and the first gear and the second gear are in rotary connection with the intermediate shaft. In the gear shifting structure of the motorcycle engine, the driving gear is arranged on the driving shaft and is in meshed transmission with the first gear on the intermediate shaft and the third gear