CN209262116U - A synchronous device arranged in a gearbox of a four-wheel drive walk-behind tractor - Google Patents

Abstract

The utility model relates to a kind of synchronizing devices of four-wheel drive hand tractor, by gear box casing, transmission gear, balladeur train and master, the compositions such as passive bevel gear, the VIIIth hole that one is used to install the 8th transmission shaft will be added on the downside of the rear portion of its gear box casing and an axis hole for being used to install rear power output shaft, 8th transmission shaft is splined shaft, the balladeur train with fork slot is housed in its left end, driving bevel gear is housed in its right end, driving bevel gear is meshed with passive bevel gear, a transmission gear is added on the left of central driver gear, balladeur train is meshed with transmission gear, passive bevel gear passes through rear power output shaft, first universal shaft, clutch and the second universal shaft is driven mutually to move connection with rear axle afterwards.The number of teeth of transmission gear is 18 teeth, and the number of teeth of balladeur train is 24 teeth, and the number of teeth of active and passive bevel gear is identical, is 25 teeth.

Description

A synchronous device arranged in a gearbox of a four-wheel drive walk-behind tractor

technical field

The utility model relates to a synchronizing device of a four-wheel drive walking tractor, in particular to a synchronizing device arranged in a gearbox of a four-wheel driving walking tractor.

Background technique

At present, the walking tractors widely used in rural areas are front-wheel drive, and the power of the engine drives the two front wheels to rotate through the clutch, gearbox and steering clutch to drive the whole vehicle forward or backward. Its trailer wheel is a driven wheel and is not connected with the driving device. Since the center of gravity of the walking tractor is in the front, the load is in the back, and the front part has a small self-weight, the adhesion of the front wheels to the ground is relatively insufficient, and it is difficult to generate sufficient traction. In addition, most of the road conditions in rural areas are not good, there are many slopes, the road surface is soft, uneven or muddy, and the front wheels often slip during the operation of the vehicle, so that the vehicle cannot walk normally, the power of the engine cannot be fully exerted, and the front wheels are damaged. Severe wear and increased fuel consumption affect the user's production efficiency and economic benefits. In order to solve this shortcoming of walking tractors, people have carried out technical improvements on walking tractors. Without affecting the power of the gearbox to the front wheels, the trailers are then driven through devices such as cardan shafts, transmission boxes, and trailer rear axles. The wheels rotate, and a four-wheel drive walking tractor is developed. However, due to structural and design reasons, most of the improved four-wheel drive walking tractors often have the problem of out-of-synchronization of the front and rear wheels when walking, stagnation and idling, resulting in unstable working conditions and even difficult manipulation. Potential safety hazards during operation have been increased.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a synchronous device installed in the gearbox of a four-wheel drive walking tractor, which not only has a reasonable structure, but also operates synchronously with front and rear wheels during operation, and has large traction force and flexible operation , good stability and strong security.

The technical solution adopted by the utility model to solve its technical problems is: a gearbox housing, a fourth transmission shaft, a transmission gear, an eighth transmission shaft, a rear power output shaft, etc. For the synchronous device inside, the lower side of the rear part of the gearbox housing is appropriately enlarged, and a hole Ⅷ for installing the eighth transmission shaft and a shaft hole for installing the rear power output shaft are added. The eighth transmission shaft is The spline shaft, the sliding gear with shift fork groove is installed on the left end of the eighth transmission shaft, and the active bevel gear is installed on the right end of the eighth transmission shaft, and the active bevel gear meshes with the passive bevel gear installed on the rear power output shaft , add a transmission gear on the left side of the central transmission gear on the fourth transmission shaft, the sliding gear meshes with the transmission gear under the toggle of the shift fork, the driven bevel gear passes through the rear power output shaft and the first cardan shaft, rear The driving clutch and the second cardan shaft are rotationally connected with the rear axle.

Described a kind of synchronous device that is located in four-wheel drive walk-behind tractor gearbox, the number of teeth of its transmission gear is 18 teeth, the number of teeth of sliding gear is 24 teeth, and the number of teeth of its active and passive bevel gear is the same, both 25 teeth.

The beneficial effect of the utility model is to add an eighth transmission shaft and a rear driving force output shaft in the gearbox, to add a transmission gear on the fourth transmission shaft, and to install a rear transmission shaft between the first cardan shaft and the second cardan shaft. Drive the clutch, so that the walking tractor changes from the front two-wheel drive to the front and rear four-wheel drive. At the same time, according to the number of revolutions of the front drive shaft, the ratio of the diameter of the front wheel to the number of revolutions of the rear drive shaft, and the diameter of the rear wheel, scientifically calculate the number of teeth of the transmission gear, sliding gear, and active and passive bevel gears, so that the four-wheel When driving the walking tractor, the front wheels are synchronized with the trailer wheels, improving its traction ability and passing ability on muddy, potholes and slopes, reducing fuel consumption and tire wear, and running smoothly, safely and reliably.

Description of drawings

Fig. 1 is a structural schematic diagram of the transmission device of the present invention.

Fig. 2 is a schematic side view of the gearbox of the present invention.

In the figure: 1. Central transmission gear; 2. Fourth transmission shaft; 3. Sliding gear; 4. Eighth transmission shaft; 5. Active bevel gear; 6. Passive bevel gear; 7. Rear power output shaft; 8. The first 1. cardan shaft; 9. clutch power input shaft; 10. rear drive clutch; 11. second cardan shaft; 12. transmission gear; 13. gearbox housing.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a structural schematic diagram of the transmission device of the present utility model, and Fig. 2 is a schematic side view of the gearbox of the present utility model. The utility model is composed of a gearbox housing (13), a fourth transmission shaft (2), a central transmission gear (1), an eighth transmission shaft (4), and a rear power output shaft (7). Appropriately increase the rear underside of the gearbox housing (13), add a hole VIII for installing the eighth transmission shaft (4) and a shaft hole for installing the rear power output shaft (7), the first The eighth transmission shaft is a spline shaft, a sliding gear (3) with a shift fork groove is installed on the left end of the eighth transmission shaft, and an active bevel gear (5) is installed on the right end of the eighth transmission shaft, and the active bevel gear (5) It meshes with the driven bevel gear (6) installed on the rear power output shaft (7), and a transmission gear (12) is added on the left side of the central transmission gear (1) on the fourth transmission shaft, and the sliding gear (3) is on the When the shift fork is moved, it meshes with the transmission gear (12), and the driven bevel gear (6) passes through the rear power output shaft (7) and the first cardan shaft (8), the clutch power input shaft (9), and the rear drive clutch (10), the second cardan shaft (11) is rotationally connected with the rear axle. The transmission gear (12) has 18 teeth, the sliding gear (3) has 24 teeth, and the active and passive bevel gears (5, 6) have the same number of teeth, 25 teeth.

The central transmission gear on the fourth transmission shaft (2) rotates, and the transmission gear on the left side and the sliding gear meshed with it are driven by the fourth shaft to rotate. The sliding gear drives the active bevel gear to rotate, and the active bevel gear drives the passive bevel gear to rotate. And drive the rear drive output shaft, the first cardan shaft, the rear drive clutch and the second cardan shaft through the driven gear to pass to the rear axle drive gear to rotate. According to the number of revolutions of the front drive shaft, the ratio of the diameter of the front wheel to the number of revolutions of the rear drive shaft, and the diameter of the rear wheel, scientifically calculate the number of teeth of the transmission gear, sliding gear, and active and passive bevel gears to achieve a reasonable transmission ratio. When the four-wheel drive walking tractor is operating, the front wheels and the wheels of the trailer have the same walking distance to achieve synchronization.

Claims (2)

1. A synchronous device located in the gearbox of a four-wheel drive walking tractor is composed of a gearbox housing, the fourth transmission shaft, transmission gears, the eighth transmission shaft, sliding gears and active and passive bevel gears, etc., its The feature is: the lower side of the rear part of the gearbox housing is appropriately enlarged, and a hole Ⅷ for installing the eighth transmission shaft and a shaft hole for installing the rear power output shaft are added. The eighth transmission shaft is a spline shaft, a sliding gear with shift fork groove is installed on the left end of the eighth transmission shaft, and an active bevel gear is installed on the right end of the eighth transmission shaft. The active bevel gear meshes with the passive bevel gear installed on the rear power output shaft. A transmission gear is added to the left side of the central transmission gear on the fourth transmission shaft. The sliding gear meshes with the transmission gear under the toggle of the shift fork. The driven bevel gear passes through the rear power output shaft and the first cardan shaft and the rear drive clutch. And the second cardan shaft is rotatably connected with the rear axle. 2. A kind of synchronous device that is located in the four-wheel drive walking tractor gearbox according to claim 1 is characterized in that: the number of teeth of the transmission gear is 18 teeth, the number of teeth of the sliding gear is 24 teeth, and its main , The number of teeth of the driven bevel gear is the same, which is 25 teeth.