CN105673784A

CN105673784A - Interaxial differential and transfer mechanism for twin-shaft gearbox and automobile with interaxial differential and transfer mechanism

Info

Publication number: CN105673784A
Application number: CN201610096616.2A
Authority: CN
Inventors: 干为民; 徐波; 潘光显; 褚辉生; 安静
Original assignee: Changzhou Institute of Technology
Current assignee: Changzhou Institute of Technology
Priority date: 2016-02-22
Filing date: 2016-02-22
Publication date: 2016-06-15
Anticipated expiration: 2036-02-22
Also published as: CN105673784B

Abstract

The invention discloses an interaxial differential and transfer mechanism for a twin-shaft gearbox and an automobile with the interaxial differential and transfer mechanism, belonging to the technical fields of differential and transfer of automobiles. The interaxial differential and transfer mechanism comprises two sets of planetary gear transmission mechanisms respectively connected to two ends of a driven shaft of the twin-shaft gearbox, wherein the driven shaft of the gearbox is a hollow shaft, one end of the driven shaft of the gearbox is connected with a planetary gear carrier of the first planetary gear transmission mechanism, and the other end of the driven shaft of the gearbox is connected with a gear ring of the second planetary gear transmission mechanism; a sun gear of the first planetary gear transmission mechanism is connected with a sun gear of the second planetary gear transmission mechanism through a differential transmission shaft penetrating through the middle of the driven shaft of the gearbox; a gear ring of the first planetary gear transmission mechanism is connected with a first power output shaft, and a planetary gear carrier of the second planetary gear transmission mechanism is connected with a second power output shaft. The interaxial differential and transfer mechanism has the advantages that the transmission efficiency is high, the stress of the driven shaft of the gearbox is small, and a large torque can be transferred.

Description

Shaft space difference speed and transfer gear and the automobile applying it for two-axis change speed gear box

Technical field

The present invention relates to the differential of a kind of four-wheel drive car and transfer system, more particularly, it relates to a kind of shaft space difference speed for two-axis change speed gear box and transfer gear and the automobile applying it.

Background technology

Four-wheel drive car is divided into full-time four-wheel drive, short-time four-wheel to drive and four-wheel drive three kinds in good time, and wherein full-time four-wheel drive at any time can realize four wheels driving force, performance is better than short-time four-wheel and drives and in good time four-wheel drive.

In order to realize full-time four-wheel drive, must equipped with transfer gear and inter-axle differential on automobile. As shown in Figure 1, a kind of method is transfer gear and inter-axle differential to be made of one, change speed gear box imparts power to transfer gear by the mode such as gear or chain, then is imparted power to antero posterior axis by transfer gear through differential mechanism, and the center differential in figure is inter-axle differential. When adopting the method, the power of change speed gear box passes to transfer gear by gear, owing to gear drive will necessarily bring kinetic equation loss, so adding the oil consumption of automobile.

In order to reduce the loss because splitter gear transmission causes, the driven shaft of transfer gear Yu change speed gear box is directly connected to by some vehicles using two-axis change speed gear box, thus reducing kinetic equation loss. As shown in Figure 2, at this moment the driven shaft of change speed gear box is hollow axle, differential mechanism is contained in one end of driven shaft, power output shaft is connected with differential mechanism, and one is directly passed through from change speed gear box, and another root passes in the middle of hollow driven shaft, wherein change speed gear box driving shaft drives driven shaft, driven shaft drives inter-axle differential, and inter-axle differential drives back axle output shaft and propons output shaft, and propons output shaft passes through from the centre of driven shaft. Eliminate, although adopting, the power attenuation using gear to transfer power to differential mechanism and to bring during the method, but also bring some problems. First, an axle therein is from traverse in the middle of change speed gear box driven shaft, and change speed gear box driven shaft must be hollow axle, when from the shaft diameter of its middle traverse too little time, its intensity is not enough, it is impossible to transmission torque too; And when, after the diameter increasing axle, the centre of driven shaft is empty too greatly, the strength reduction of driven shaft is too many, so the transmission torque of this differential system is less than upper one; Secondly, the power of this transfer device exports from one end of driven shaft completely, and driven shaft stress is big, and strength of materials utilization rate is not high.

Summary of the invention

1. invention to solve the technical problem that

Transmission efficiency is low, transmit the deficiency that torque is little to it is an object of the invention to overcome the transfer of existing four-wheel drive car and differential system to exist, a kind of shaft space difference speed for two-axis change speed gear box and transfer gear and the automobile applying it are provided, adopt technical scheme, there is transmission efficiency height, change speed gear box driven shaft subjected to stress is little, can transmit the advantages such as big torque.

2. technical scheme

For reaching above-mentioned purpose, technical scheme provided by the invention is:

A kind of shaft space difference speed for two-axis change speed gear box of the present invention and transfer gear, including the first planet gear drive and the second planetary gear mechanism that are connected to two-axis change speed gear box driven shaft two ends, wherein,

Described change speed gear box driven shaft is hollow axle, and one end of change speed gear box driven shaft is connected with the pinion frame of first planet gear drive, and the gear ring of the other end and the second planetary gear mechanism is connected; The sun gear of described first planet gear drive and the sun gear of the second planetary gear mechanism are connected by the differential gearing axle of traverse in the middle of change speed gear box driven shaft; Gear ring and first power output shaft of described first planet gear drive are connected, and pinion frame and second power output shaft of the second described planetary gear mechanism are connected.

A kind of automobile applying above-mentioned shaft space difference speed and transfer gear of the present invention, the first described power output shaft and the second power output shaft connect the front-rear axle of automobile respectively.

3. beneficial effect

Adopt technical scheme provided by the invention, compared with existing known technology, there is following remarkable result:

A kind of shaft space difference speed for two-axis change speed gear box of the present invention and transfer gear and the automobile applying it, with differential conventional at present compared with transfer system, it has transmission efficiency height, and change speed gear box driven shaft subjected to stress is little, can transmit the advantages such as big torque; And simple in construction, it is convenient to implement.

Accompanying drawing explanation

Fig. 1 is transfer and the differential system schematic diagram of a kind of four-wheel drive car of the prior art;

Fig. 2 is transfer and the differential system schematic diagram of another kind of four-wheel drive car of the prior art;

Fig. 3 is a kind of shaft space difference speed for two-axis change speed gear box principle schematic with transfer gear of the present invention.

Label declaration in schematic diagram:

1a, the first power output shaft; 1b, the second power output shaft; 2a, first planet gear; 2b, the second planetary gear; 3a, the first sun gear; 3b, the second sun gear; 4, differential gearing axle; 5, change speed gear box driven shaft; 6a, the first gear ring; 6b, the second gear ring; 7a, first planet tooth rest; 7b, the second pinion frame; 8, gear.

Detailed description of the invention

For further appreciating that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

Embodiment

Shown in Fig. 3, a kind of shaft space difference speed for two-axis change speed gear box of the present embodiment and transfer gear, including the first planet gear drive and the second planetary gear mechanism that are connected to two-axis change speed gear box driven shaft two ends, wherein:

First planet gear drive includes first planet gear 2a, the first sun gear 3a, the first gear ring 6a and first planet tooth rest 7a, first planet gear 2a and the first sun gear 3a external toothing, first planet gear 2a and the first gear ring 6a internal messing; The structure of the second planetary gear mechanism is identical with the structure of first planet gear drive, including the second planetary gear 2b, the second sun gear 3b, the second gear ring 6b and the second pinion frame 7b, second planetary gear 2b and the second sun gear 3b external toothing, the second planetary gear 2b and the second gear ring 6b internal messing.

Change speed gear box driven shaft 5 is hollow axle, and one end of change speed gear box driven shaft 5 is connected with the first planet tooth rest 7a of first planet gear drive, and the second gear ring 6b of the other end and the second planetary gear mechanism is connected; First sun gear 3a of first planet gear drive and the second sun gear 3b of the second planetary gear mechanism is by being connected from the differential gearing axle 4 of the middle traverse of change speed gear box driven shaft 5; The first gear ring 6a and the first power output shaft 1a of first planet gear drive are connected, and the second pinion frame 7b and the second power output shaft 1b of the second planetary gear mechanism are connected.

The present embodiment gives a kind of automobile applying above-mentioned shaft space difference speed and transfer gear, and in this vehicle transmission mechanism, the first power output shaft 1a and the second power output shaft 1b connects the front-rear axle of automobile respectively.

In order to be more fully understood that present disclosure, set forth a kind of shaft space difference speed for two-axis change speed gear box of the present invention and the operation principle of transfer gear in conjunction with Fig. 3.

When full-time four-wheel drive car travels, change speed gear box drives front-rear axle to drive vehicle to travel. When automobile turning, front-rear axle needs to produce speed difference, observes on differential mechanism if at this moment stood in, and the rotation direction of propons is contrary with the rotation direction of back axle, and now front-rear axle produces speed difference, thus realizing differential motion.

As shown in Figure 3, when the vehicle is running, the driving shaft (not shown) of change speed gear box drives change speed gear box driven shaft 5 to rotate by the gear 8 on change speed gear box driven shaft 5, and one end of change speed gear box driven shaft 5 drives first planet tooth rest 7a to rotate, and the other end drives the second gear ring 6b to rotate. At the left end of Fig. 3, first planet tooth rest 7a drives first planet gear 2a and the first gear ring 6a to rotate, thus driving the first power output shaft 1a to rotate; At the right-hand member of Fig. 3, the second gear ring 6b drives the second planetary gear 2b and the second pinion frame 7b to rotate, thus driving the second power output shaft 1b to rotate.

When needs produce differential motion, it is assumed that standing in and observe on change speed gear box driven shaft 5, change speed gear box driven shaft 5 is fixing, and now the direction of rotation of the first power output shaft 1a should be contrary with the direction of rotation of the second power output shaft 1b. Assume that the first power output shaft 1a is for rotating clockwise, at this moment the first gear ring 6a is for rotating clockwise, first planet tooth rest 7a maintains static, owing to first planet gear 2a and the first gear ring 6a is internal messing, therefore first planet gear 2a is also for rotating clockwise, first sun gear 3a and first planet gear 2a is external toothing, and therefore the first sun gear 3a rotates counterclockwise. Now, first sun gear 3a drives the second sun gear 3b to rotate counterclockwise by differential gearing axle 4, it is connected with change speed gear box driven shaft 5 by the second gear ring 6b and fixes, therefore the second sun gear 3b rotates counterclockwise with the second pinion frame 7b, thus driving the second power output shaft 1b also to rotate counterclockwise, and then realize the first power output shaft 1a and the differential motion of the second power output shaft 1b.

Owing to the power of mechanism is directly to be passed over by change speed gear box driven shaft 5, so transmission efficiency is high, when not needing differential, theoretic transmission efficiency is 100%; Exporting respectively simultaneously as power is the two ends from change speed gear box driven shaft 5, so every one end of change speed gear box driven shaft 5 is solely subjected to sub-load, suffered stress is little; Further, owing to the two ends of differential gearing axle 4 are connected with the sun gear of two planetary gear mechanisms, and the diameter of sun gear is little, so the stress of differential gearing axle 4 is little, therefore can transmit big torque.

Below schematically the present invention and embodiment thereof being described, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited thereto. So, if those of ordinary skill in the art is enlightened by it, when without departing from the invention objective, without creatively designing the frame mode similar to this technical scheme and embodiment, protection scope of the present invention all should be belonged to.

Claims

1. for the shaft space difference speed of two-axis change speed gear box and transfer gear, it is characterised in that: include the first planet gear drive and the second planetary gear mechanism that are connected to two-axis change speed gear box driven shaft two ends, wherein,

2. apply the automobile of the shaft space difference speed described in claim 1 and transfer gear, it is characterised in that: the first described power output shaft and the second power output shaft connect the front-rear axle of automobile respectively.