CN202826980U

CN202826980U - Rear axle of off-road vehicle

Info

Publication number: CN202826980U
Application number: CN 201220350513
Authority: CN
Inventors: 万勇; 谭继荣; 黄兴刚; 张劲航; 谭江湖
Original assignee: Chongqing Dajiang Industry Co Ltd
Current assignee: Chongqing Dajiang Axle Co ltd
Priority date: 2012-07-19
Filing date: 2012-07-19
Publication date: 2013-03-27
Anticipated expiration: 2022-07-19

Abstract

The utility model relates to a rear axle of an off-road vehicle. The rear axle of the off-road vehicle comprises a rear axle shell, a rear main reducing gear, two rear half shafts of two front half shafts, rear axle half shaft sleeves, and rear wheel side driving devices, wherein the rear main reducing gear is arranged in the middle of the rear axle shell, one end of each rear half shaft is connected with the rear main reducing gear in a matched mode, the other end of each rear half shaft is connected with a hub of a wheel through splines, each rear axle half shaft sleeve is matched with one end of one rear half shaft, and each rear wheel side driving device is arranged on one half shaft sleeve in a matched mode and connected with the end portion of the rear axle shell. The rear axle of the off-road vehicle is characterized in that the rear main reducing gear is a single-stage reduction mechanism, and the range of the speed ratio is from 1.208 to 2.727. According to the rear axle of the off-road vehicle, driving gears and driven gears in the rear wheel side driving devices and the rear main reducing gear are designed innovatively, and therefore the rear axle of the off-road vehicle is compact in structure and reliable in performance, and the problem that under specific working conditions, an existing heavy-duty vehicle rear axle cannot have a dynamic property, a fuel economical property and passing ability at the same time is solved.

Description

A kind of cross-country car back axle

Technical field

The utility model relates to automobile component, is specifically related to a kind of cross-country car back axle.

Background technology

At present, still there are some technical matterss in 10T level single-stage speed reducing cross-country vehicle axle, and its Major Difficulties is how to carry out the structural design of vehicle bridge, makes it when satisfying its dynamic property requirement, has good fuel economy and crossing ability.Along with the development of heavy motor vehicle technology, also more and more higher to the performance requriements of heavy motor vehicle.The automobile of designing according to requirements such as the varying environment of Vehicle Driving Cycle, operating modes should guarantee that it has enough dynamic property, guarantees that again it has good manoevreability.

Existing single-stage speed reducing cross-country vehicle axle, speed ratio is larger, and corresponding basin tooth diameter is large, and its vehicle bridge bridge bag is just large, thereby carrying capacity is just poor, therefore, need to be improved.

Summary of the invention

The purpose of this utility model provides a kind of cross-country car back axle, and it can be under varying environment and different operating modes, makes cross-country car not only have good dynamic property, but also have fuel economy and good crossing ability.

A kind of cross-country car back axle described in the utility model, comprise rear-axle casing, be located at semiaxis after two that rear primary gearbox in the rear-axle casing middle part and an end be connected with rear primary gearbox respectively, respectively with two after the rear-axle tube that cooperates of semiaxis one end, the trailing wheel limit actuator that is engaged on the rear axle tube and is connected with the rear-axle casing end, it is characterized in that:

Described rear primary gearbox is single-stage speed reducing mechanism, and speed ratio is 1.208 transmitting ratios to the 2.727(driven gear number of teeth and the driving gear number of teeth); Because rear primary gearbox is single-stage speed reducing mechanism, compact conformation, corresponding bridge bag is little, and the ground Clearance is large, and this point is different from traditional bridge pack arrangement (speed ratio is 4.111 to 7.166 scopes), thereby has guaranteed that this kind cross-country car has good crossing ability.

Further, described trailing wheel limit actuator by rear-wheel hub, be located in the rear-wheel hub and the bearing set that directly cooperates with rear semiaxis and oil sealing, cooperate with the other end of rear semiaxis and be connected to the rear driving flange on the rear-wheel hub and the consequence sliding piece that is connected on the rear driving flange by second group of screw forms by first group of screw; One end of rear driving flange and rear semiaxis passes through spline fitted.Thereby realization transfer of torque; Rear driving flange links together by eight first group of screws and rear-wheel hub, to guarantee the reliability of transmission.

Rear-axle casing is cast steel structure, principal feature has been to abandon the bridge pack arrangement of traditional single-stage speed reducing axle shell, and selected the foot bridge pack arrangement of the better class formula of crossing ability dual-ratio reduction bridge, it is requirement in 1.208 to 2.727 scopes that speed ratio of main reducer also can be satisfied in the locus of this structure bridge bag.

The difference of rear-axle tube and traditional axle tube is without male splines, because it does not need fifth wheel limit actuator.

Trailing wheel limit single reduction gear has the characteristics of dual-ratio reduction bridge in shape, but actual inner structure has the character of single-stage speed reducing bridge, that is to say that the wheel limit of this bridge is without planetary reduction gear, rear-wheel hub is connected with rear driving flange by eight bolts, rear driving flange is connected with semiaxis by the female splines of self again, thereby realizes transfer of torque.

Further, be respectively equipped with a rear brake at described two trailing wheel limit actuators.

The utility model is because the novelty design that the driving gear in trailing wheel limit actuator, the rear primary gearbox and ring gear have been carried out, so compact conformation, dependable performance, actv. has solved under specific operating mode, and existing heavy automobile bridges can not have the problem of dynamic property, fuel economy and crossing ability concurrently.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of Fig. 1 one end;

Fig. 3 is the profile scheme drawing of rear primary gearbox;

Fig. 4 is trailing wheel limit single reduction gear structural representation;

Fig. 5 is the structural representation of back axle driving flange;

Fig. 6 is the A-A cutaway view of Fig. 5;

Fig. 7 is the structural representation of axle tube.

The specific embodiment

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

Embodiment one: referring to Fig. 1 to a kind of cross-country car back axle shown in Figure 7, comprise rear-axle casing 17, be located at semiaxis 21 after two that rear primary gearbox 18 in the rear-axle casing middle part and an end be connected with rear primary gearbox respectively, respectively with two after the rear-axle tube 31 that cooperates of semiaxis one end, be engaged on the rear axle tube and the trailing wheel limit actuator 19 that is connected with rear-axle casing 17 ends, its innovative point is: rear primary gearbox 18 is single-stage speed reducing mechanism, and speed ratio is 1.208.Described trailing wheel limit actuator 19 by rear-wheel hub 22, be located in the rear-wheel hub and the bearing set 24 and the oil sealing 25 that directly cooperate with rear semiaxis, cooperate with the other end of rear semiaxis 21, and be connected to the rear driving flange 23 on the rear-wheel hub and be connected to consequence sliding piece 27 compositions on the rear driving flange by second group of screw 28 by first group of screw 26; Rear driving flange 23 passes through spline fitted with an end of rear semiaxis 21; Be respectively equipped with a rear brake 20 at described two trailing wheel limit actuators 19.

Embodiment two: referring to Fig. 1 to a kind of cross-country car back axle shown in Figure 7, comprise rear-axle casing 17, be located at semiaxis 21 after two that rear primary gearbox 18 in the rear-axle casing middle part and an end be connected with rear primary gearbox respectively, respectively with two after the rear-axle tube 31 that cooperates of semiaxis one end, be engaged on the rear axle tube and the trailing wheel limit actuator 19 that is connected with rear-axle casing 17 ends, its innovative point is: rear primary gearbox 18 is single-stage speed reducing mechanism, and speed ratio is 2.727.Described trailing wheel limit actuator 19 by rear-wheel hub 22, be located in the rear-wheel hub and the bearing set 24 and the oil sealing 25 that directly cooperate with rear semiaxis, cooperate with the other end of rear semiaxis 21, and be connected to the rear driving flange 23 on the rear-wheel hub and be connected to consequence sliding piece 27 compositions on the rear driving flange by second group of screw 28 by first group of screw 26; Rear driving flange 23 passes through spline fitted with an end of rear semiaxis 21; Be respectively equipped with a rear brake 20 at described two trailing wheel limit actuators 19.

Embodiment three: referring to Fig. 1 to a kind of cross-country car back axle shown in Figure 7, comprise rear-axle casing 17, be located at semiaxis 21 after two that rear primary gearbox 18 in the rear-axle casing middle part and an end be connected with rear primary gearbox respectively, respectively with two after the rear-axle tube 31 that cooperates of semiaxis one end, be engaged on the rear axle tube and the trailing wheel limit actuator 19 that is connected with rear-axle casing 17 ends, its innovative point is: rear primary gearbox 18 is single-stage speed reducing mechanism, and speed ratio is 2.135.Described trailing wheel limit actuator 19 by rear-wheel hub 22, be located in the rear-wheel hub and the bearing set 24 and the oil sealing 25 that directly cooperate with rear semiaxis, cooperate with the other end of rear semiaxis 21, and be connected to the rear driving flange 23 on the rear-wheel hub and be connected to consequence sliding piece 27 compositions on the rear driving flange by second group of screw 28 by first group of screw 26; Rear driving flange 23 passes through spline fitted with an end of rear semiaxis 21; Be respectively equipped with a rear brake 20 at described two trailing wheel limit actuators 19.

Claims

1. cross-country car back axle, comprise rear-axle casing (17), be located at semiaxis (21) after two that rear primary gearbox (18) in the rear-axle casing middle part and an end be connected with rear primary gearbox respectively, respectively with two after the rear-axle tube (31) that cooperates of semiaxis one end, be engaged on the rear axle tube and the trailing wheel limit actuator (19) that is connected with rear-axle casing (17) end, it is characterized in that: described rear primary gearbox (18) is single-stage speed reducing mechanism, and speed ratio is 1.208 to 2.727.

2. a kind of cross-country car back axle according to claim 1, it is characterized in that: described trailing wheel limit actuator (19) by rear-wheel hub (22), be located in the rear-wheel hub and the bearing set (24) and the oil sealing (25) that directly cooperate with rear semiaxis, cooperate with the other end of rear semiaxis (21), and be connected to the rear driving flange (23) on the rear-wheel hub and be connected to consequence sliding piece (27) composition on the rear driving flange by second group of screw (28) by first group of screw (26); Rear driving flange (23) passes through spline fitted with an end of rear semiaxis (21).

3. a kind of cross-country car back axle according to claim 1 and 2 is characterized in that: be respectively equipped with a rear brake (20) at described two trailing wheel limit actuators (19).