CN1378926A - Differential independent unit for individual 4 drivers of moto-driven vehicle - Google Patents

Abstract

A differential independent driver for 4-drive motor-driven vehicle is disclosed. The input drive shaft is driven by an input shaft gear via speed variator. The gear installed on input drive shaft is engaged with the gear on the mainshaft. The non-shelled differential unit is installed to the mainshaft via spline. The shaft holes is left or right semi-shaft gear is matched with the mainshaft in slide mode and their external cylindrical gears are respectively engaged with the gears on two parallel drive shafts of back wheels. The drive shaft of rear wheels are linked to the drive shafts of front wheel via clutch. It can prevent skid of wheels.

Description

Motor vehicle independent four-wheel drive differential transfer device

Technical field: the invention belongs to the improvement of the differential transmission device of the motor vehicle, especially the independent four-wheel drive differential transmission device of the motor vehicle.

Background technology: my country is a large agricultural country, and agriculture is gradually realizing mechanized production, and tractors are the main members of agricultural machinery. In work, the tractor is required to be able to adapt to arable land operations on various road surfaces, and to be able to drive normally and have good passing performance. The current four-wheel drive tractor is in the form of four-wheel drive controlled by two differentials. The transfer case is too large in size, which limits the ground clearance and affects the passing performance of the vehicle. When the tractor is running on a bad road, the wheels tend to slip and the traction force decreases, so that the vehicle cannot run normally, and its structure is complicated and its manufacturing cost is high.

Summary of the invention: The purpose of the present invention is to provide an independent four-wheel drive differential transfer device for a motor vehicle, which can prevent the wheels from slipping and turn freely when the tractor is running on a bad road, so as to ensure the normal driving of the vehicle; and the structure is simple, and the transfer case The outer dimension is small, the ground clearance is increased, and the passing performance of the vehicle is improved.

The purpose of the present invention is achieved in this way: an independent four-wheel drive differential transfer device for a motor vehicle, including a differential, the input shaft gear drives the input transmission shaft to rotate through the speed change device, the gear installed on the input transmission shaft and the gear on the main shaft The gears are meshed, and the shellless differential is installed on the main shaft through splines. The shaft holes of the left and right side gears are respectively slidably matched with the main shaft, and the outer cylindrical gears of the left and right side gears are respectively installed in symmetrical parallel. The gears on the two rear wheel drive shafts are meshed, and the other sides of the two rear wheel drive shafts are respectively connected to the two front wheel drive shafts through the clutch device.

The present invention connects the two rear wheel drive shafts arranged symmetrically and parallel to the two front wheel drive shafts through two symmetrical clutch devices, and finally outputs the power to the corresponding front and rear wheel side reducers to drive the vehicle. go ahead. Realized that the wheels on the same side are linked and rotate at the same speed. In this way, the wheels on both sides are allowed to have a speed difference, therefore, the steering performance of the vehicle will not be affected, so that the vehicle can steer freely.

When the vehicle equipped with the present invention is running on a normal road surface, the clutch device is manipulated so that the two rear wheel drive shafts are respectively disconnected from the two front wheel drive shafts. At this moment, the vehicle adopts the form of rear wheel drive to travel. When the vehicle is running on a bad road, the clutch device is manipulated so that the two rear wheel drive shafts are respectively connected with the two front wheel drive shafts. In this way, four-wheel drive is realized, and the wheels on the same side will rotate at the same speed. When one wheel slips, the power of the other three wheels still exists, and the vehicle can run normally. When the two wheels on the same drive axle or on the diagonal slip, because the wheels on the same side are linked, the power of the non-skidding wheel will increase due to the reduction of the power of the slipping wheel. In this case, the vehicle can still drive normally. The grip performance of the wheels is enhanced, the wheels do not slip during farmland operations and transportation, the steering is free, and the power of the engine is fully utilized.

Due to the simple structure of the present invention, a differential gear is used to drive the transfer case of four wheels, which reduces the external dimension of the transfer case, increases the ground clearance, and improves the passing capacity.

BRIEF DESCRIPTION OF THE DRAWINGS: Fig. 1 is a schematic cross-sectional structure diagram of the present invention, and Fig. 2 is a schematic cross-sectional structural diagram along A-A of Fig. 1 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS: The present invention will be further described in detail below in conjunction with the accompanying drawings. An independent four-wheel-drive differential transmission device for a motor vehicle, including a differential gear, two paths of power are output from the gearbox, and one path of power is input to the transmission shaft 16, which is used to transmit independent output power to meet the needs of various advanced agricultural tools at present or in the future. job requirements. The other way is input to the transfer case through the input shaft gear 1, and one end of the input transmission shaft 4 is installed in the shaft hole of the input shaft gear 1 through the bearing support, and the other end is installed on the bearing seat, and the input shaft gear 1 is driven by the speed change device. The input transmission shaft 4 rotates, and the gear 3 installed on the other side of the input transmission shaft 4 meshes with the gear 11 on the main shaft 8. The large gears are meshed, and the sliding composite gear 2 is installed through a spline in the middle of the input transmission shaft 4. The sliding composite gear 2 has an inner ring gear and an outer cylindrical gear; when the sliding composite gear 2 is located on the right side of the input transmission shaft 4, its The outer cylindrical gear meshes with the pinion of the large and small composite gear 15 installed by bearings on the main shaft 8. When the sliding composite gear 2 is located on the left side of the input transmission shaft 4, its internal ring gear meshes with the input shaft gear 1. The sliding compound gear 2 is controlled by the shift fork to mesh with the pinion of the input shaft gear 1 or the large and small compound gear 15, so that the input transmission shaft 4 can obtain different rotational speeds. The caseless differential 6 is mounted on the main shaft 8 through a spline, and the shaft holes of the left and right side gears 5 and 7 are slidingly fitted with the main shaft 8 respectively, and the outer cylindrical gears of the left and right side gears 5 and 7 are respectively It meshes with the gears 12, 10 installed on the symmetrically parallel two rear wheel drive shafts 17, 9, and the other sides of the two rear wheel drive shafts 17, 9 are respectively connected to the two front wheel drive shafts 14 through the clutch device , Note: the labels of the two front wheel drive shafts are all 14. The clutch device is an overrunning clutch installed respectively on two rear wheel drive shafts 17, 9 and two front wheel drive shafts 14 through splines, and the overrunning clutch is a friction wedge type one-way overrunning clutch or a roller type one-way overrunning clutch ; As shown in Figure 1, wherein the bushing of the housing 13 of the roller type one-way overrunning clutch is respectively installed on the two rear wheel drive shafts 17,9 through splines, and the star wheel 18 is respectively installed on the two front wheels through splines. on the wheel drive shaft 14; when the wedge type one-way overrunning clutch is used, its star wheels are respectively installed on the two rear wheel drive shafts 17 and 9 through splines, and the axle sleeves of the shell are respectively installed on the two front wheel drive shafts through splines. On drive shaft 14; Vehicle is in operation, and when front wheel slips or vehicle turns, when front wheel speed is greater than the speed of rear wheel drive shaft, overrunning clutch cuts off the power that is transmitted by front wheel automatically, is that whole transmission system does not take place parasitic power. When the vehicle is running on a good road or sliding downhill, the overrunning clutch is moved by the shift fork, so that the two overrunning clutches are respectively disconnected from the rear drive shaft and the front wheel drive shaft, so as to improve the transmission efficiency.

The invention satisfies various requirements of the country for tractors, achieves linkage of the wheels on the same side, increases the ground clearance, improves the passing capacity, enhances the grip of the wheels, and prevents the wheels from slipping during farmland operations and transportation. The steering is free and the power of the engine is fully utilized.

Claims (3)

1. differential independent unit for individual 4 drivers of moto-driven vehicle, comprise diff, it is characterized in that: input shaft gear (1) drives input shaft (4) by transmission system and rotates, the gear (3) that input shaft (4) is upward installed is meshed with the gear (11) on the main shaft (8), no shell-type diff (6) is installed on the main shaft (8) by spline, its left side, right axle shaft gear (5,7) axis hole respectively with main shaft (8) bearing fit, a left side, right axle shaft gear (5,7) outer cylinder gear respectively with two back-wheel drive axles (17 that are installed in symmetrical parallel, 9) gear (12 on, 10) be meshed, the opposite side of two back-wheel drive axles (17,9) is connecting two front wheel driving shafts (14) by arrangement of clutch respectively.

2. differential independent unit for individual 4 drivers of moto-driven vehicle according to claim 1, it is characterized in that: to be input shaft gear (1) be meshed with big gear wheel by the big or small compound gear (15) of bearing installation on main shaft (8) transmission system, middle part at input shaft (4) is installed with slip compound gear (2) by spline, and slip compound gear (2) has internally toothed annulus and outer cylinder gear; When it was positioned at the right side of input shaft (4), the miniature gears that its outer cylinder gear and main shaft (8) are gone up by the big or small compound gear (15) of bearing installation was meshed; When it was positioned at the left side of input shaft (4), its internally toothed annulus was meshed with input shaft gear (1).

3. differential independent unit for individual 4 drivers of moto-driven vehicle according to claim 1 is characterized in that: arrangement of clutch is for being installed in the overriding clutch on two back-wheel drive axles (17,9) and two front wheel driving shafts (14) respectively by spline.

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