Outer box body transmission device of middle power output system of motorcycle engine

Abstract

An outer box body transmission device of a power output system in a motorcycle engine is characterized in that a reversing mechanism is arranged on one side of the engine, an engine rear transmission box is arranged at the rear end of the engine, and a shaft head of a power output shaft penetrates through a box plate of the engine rear transmission box; a shaft head of a power output shaft, a transmission shaft and a power output shaft are longitudinally arranged in the engine rear transmission box respectively; a transmission gear set is arranged between a shaft head of the power output shaft and one end of the transmission shaft, a high-speed gear set is arranged between one end of the transmission shaft and the power output shaft, and a low-speed gear set is arranged between the other end of the transmission shaft and the power output shaft; the middle power output system of the motorcycle engine is arranged to be the outer box body transmission device, the high-speed transmission gear and the low-speed transmission gear are additionally arranged in the transmission shaft and the outer box body transmission device, contact faces of the gears are combined, gear abrasion is reduced, the mechanism is simple and reasonable, maintenance and repair of a change gear structure of the engine are facilitated, and the service life of the engine is prolonged. The service life of the engine is prolonged.

Description

Technical Field

[0001] The utility model relates to a box body of a motorcycle engine power output system, in particular to an outer box body transmission device of a motorcycle engine mid-mounted power output system. Background Art

[0002] At present, most of the speed change mechanisms of motorcycle engines are built-in gear structures. Due to the large number of gears inside the engine and the interference of oil flow, the transmission strength of the built-in gear speed change mechanism is high. During long-term operation, the gear contact surface is small, which is prone to rapid wear and tear, and the gap increases, resulting in unstable power output of the built-in gear structure of the engine. There is obvious jerking when shifting gears, which weakens the power output of the engine. The engine oil and gear oil are mixed, which affects the maintenance and repair of the engine gear structure. In addition, the existing structure has only one transmission mode and cannot adapt to the requirements under various complex conditions. In order to optimize the existing built-in gear structure of the mid-mounted power output system of the motorcycle engine, the gear contact surface is small and is prone to rapid wear and tear. In view of the above reasons, an outer box transmission device for the mid-mounted power output system of the motorcycle engine is proposed. Utility Model Content

[0003] The purpose of the utility model is to overcome the problems of high transmission strength, small gear contact surface, and small gear contact surface of the existing motorcycle engine mid-mounted power output system, which are easy to wear quickly; through reasonable design, an outer box transmission device of the motorcycle engine mid-mounted power output system is provided; the utility model sets the motorcycle engine mid-mounted power output system as an outer box transmission device, and performs reversing transmission through the outer box transmission device of the engine. A transmission shaft and an output shaft are longitudinally installed in the outer box transmission device, and contact surfaces of high-speed transmission gears and low-speed transmission gears are added to the transmission shaft and the outer box transmission device, thereby reducing gear wear and providing two engine high-speed and low-speed modes. When using the high-speed mode, the engine runs faster and saves more fuel, and when using the low-speed mode, the engine has greater power and a stronger load-bearing capacity. The utility model has a simple and reasonable structure, is convenient for maintenance and repair of the engine speed gear structure, and extends the service life of the engine.

[0004] In order to achieve the above-mentioned object, the utility model adopts the following technical scheme: an outer box transmission device of a motorcycle engine mid-mounted power output system is composed of: an engine, a reversing mechanism, a first power output shaft, an engine rear transmission case, a transmission shaft, a transmission bearing, a second power output shaft, a power output bearing, a shift lever, a main shaft, a transmission gear set, a high-speed gear set, and a low-speed gear set; a main shaft is provided in the engine, a reversing mechanism is provided on one side of the engine, a shift lever is provided on one side of the reversing mechanism, a first power output shaft is provided at the rear end of the reversing mechanism, an engine rear transmission case is provided at the rear end of the engine, one end of the engine rear transmission case is adjacent to the reversing mechanism, a shaft head of the first power output shaft is provided opposite to a box plate of the engine rear transmission case; a shaft head of the first power output shaft, a transmission shaft, and a second power output shaft are respectively provided in the engine rear transmission case longitudinally, a pair of transmission bearings are provided between the two ends of the transmission shaft and the engine rear transmission case, and a power output bearing is provided between the two ends of the second power output shaft and the engine rear transmission case;

[0005] A transmission gear set is arranged between the shaft head of the first power output shaft and one end of the transmission shaft, a high-speed gear set is arranged between one end of the transmission shaft and the second power output shaft, a low-speed gear set is arranged between the other end of the transmission shaft and the second power output shaft, and a shift fork device is arranged between the high-speed gear and the low-speed gear of the transmission shaft.

[0006] Beneficial effects: The utility model sets the mid-mounted power output system of the motorcycle engine as an outer box transmission device, and performs reversing transmission through the outer box transmission device of the engine. The transmission shaft and the output shaft are longitudinally installed in the outer box transmission device. The contact surface of the high-speed transmission gear and the low-speed transmission gear combined with the gear is added in the transmission shaft and the outer box transmission device, which reduces gear wear and provides two modes of engine high speed and low speed. When using the high-speed mode, the engine runs faster and saves more fuel. In the low-speed mode, the engine has greater power and a stronger load-bearing capacity. The structure is simple and reasonable, which facilitates the maintenance and repair of the engine speed gear structure and extends the service life of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention will be further described below with reference to the accompanying drawings:

[0008] Figure 1 : Engine 1, reversing mechanism 2, first power output shaft 2-1, engine rear transmission box 3, transmission shaft 4, transmission bearing 5, second power output shaft 6, power output bearing 7, gear lever 8, main shaft 9, transmission gear set 10, high-speed gear set 11, low-speed gear set 12. DETAILED DESCRIPTION

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0010] A main shaft 9 is provided in the engine 1, a reversing mechanism 2 is provided on one side of the engine 1, a shift lever 8 is provided on one side of the reversing mechanism 2, a first power output shaft 2-1 is provided at the rear end of the reversing mechanism 2, an engine rear transmission box 3 is provided at the rear end of the engine 1, one end of the engine rear transmission box 3 is provided adjacent to the reversing mechanism 2, and the shaft head of the first power output shaft 2-1 is provided to penetrate the box plate of the engine rear transmission box 3; the shaft head of the first power output shaft 2-1, a transmission shaft 4, and a second power output shaft 6 are respectively provided longitudinally in the engine rear transmission box 3, a pair of transmission bearings 5 are provided between the two ends of the transmission shaft 4 and the engine rear transmission box 3, and power output bearings 7 are provided between the two ends of the second power output shaft 6 and the engine rear transmission box 3;

[0011] A transmission gear set 10 is arranged between the shaft head of the first power output shaft 2-1 and one end of the transmission shaft 4, a high-speed gear set 11 is arranged between one end of the transmission shaft 4 and the second power output shaft 6, a low-speed gear set 12 is arranged between the other end of the transmission shaft 4 and the second power output shaft 6, and a shift fork device is arranged between the high-speed gear and the low-speed gear of the transmission shaft 4.

Claims

1. An outer box transmission device of a motorcycle engine mid-mounted power output system, comprising: an engine (1), a reversing mechanism (2), a first power output shaft (2-1), an engine rear transmission case (3), a transmission shaft (4), a transmission bearing (5), a second power output shaft (6), a power output bearing (7), a shift lever (8), a main shaft (9), a transmission gear set (10), a high-speed gear set (11), and a low-speed gear set (12); characterized in that: A main shaft (9) is provided in the engine (1), a reversing mechanism (2) is provided on one side of the engine (1), a shift lever (8) is provided on one side of the reversing mechanism (2), a first power output shaft (2-1) is provided at the rear end of the reversing mechanism (2), an engine rear transmission box (3) is provided at the rear end of the engine (1), one end of the engine rear transmission box (3) is provided adjacent to the reversing mechanism (2), and a shaft head of the first power output shaft (2-1) is provided to penetrate a box plate of the engine rear transmission box (3); a shaft head of the first power output shaft (2-1), a transmission shaft (4), and a second power output shaft (6) are respectively provided in the longitudinal direction of the engine rear transmission box (3), a pair of transmission bearings (5) are provided between the two ends of the transmission shaft (4) and the engine rear transmission box (3), and a power output bearing (7) is provided between the two ends of the second power output shaft (6) and the engine rear transmission box (3).

2. The outer box transmission device of the motorcycle engine mid-mounted power take-off system according to claim 1, characterized in that: A transmission gear set (10) is provided between the shaft head of the first power output shaft (2-1) and one end of the transmission shaft (4), a high-speed gear set (11) is provided between the transmission shaft (4) and one end of the second power output shaft (6), a low-speed gear set (12) is provided between the transmission shaft (4) and the other end of the second power output shaft (6), and a shift fork device is provided between the high-speed gear and the low-speed gear of the transmission shaft (4).

Images