CN221187990U - All-terrain vehicle rear axle assembly - Google Patents

Abstract

The utility model discloses an all-terrain vehicle rear axle assembly, which comprises a left half axle, a right half axle, a universal transmission shaft, a driving gear shaft and a driven gear, wherein the left half axle and the right half axle are coaxially arranged; the differential mechanism assembly comprises a left driving gear, a right driving gear and two planetary gears which are vertically distributed and are arranged in a differential mechanism shell, wherein the left driving gear is sleeved at one end of a left half shaft and fixedly connected with the left half shaft, the right driving gear is sleeved at one end of a right half shaft and fixedly connected with the right half shaft, and the planetary gears are fixed at the inner side of a driven gear, are arranged between the left driving gear and the right driving gear and are simultaneously meshed with the left driving gear and the right driving gear.

Description

All-terrain vehicle rear axle assembly

Technical Field

The utility model relates to an all-terrain vehicle rear wheel transmission mechanism, in particular to an all-terrain vehicle rear axle assembly.

Background

All-terrain vehicles refer to vehicles capable of running on any terrain, can freely run on the terrain where common vehicles are difficult to run, and are commonly called beach vehicles in China. The rear axle assembly is an important component in a vehicle transmission mechanism, and China patent with the application number 2019103875385 discloses a rear axle assembly of an all-terrain vehicle, and the rear axle assembly comprises a rear axle, a rear cradle assembly and bearing seat assemblies, wherein rear wheel mounting seats are respectively fixed at two ends of the rear axle, the bearing seat assemblies are arranged in the middle of the rear axle, and the rear cradle assembly is matched with the bearing seat assemblies. The rear axle adopted in the rear axle assembly is a whole axle, and when the vehicle is in a running process, if the vehicle turns, the strokes of the two rear wheels are different, but the rotating speeds of the left rear wheel and the right rear wheel are the same, so that the whole vehicle is easy to sideslip.

In a rear axle transmission mechanism of an automobile, in order to avoid the phenomenon of sideslip during turning, the rear axle assembly of the automobile mainly comprises a speed reducer assembly, a differential mechanism assembly and two axle tubes connected to the left end and the right end of a differential mechanism shell, a half axle driven to rotate by the differential mechanism assembly is arranged in the axle tubes in a penetrating manner, and a hub driven to rotate by the half axle is arranged at the outer end part of the axle tubes. Through set up differential mechanism between the semi-axis of both sides, when turning, the rotational speed of both sides semi-axis can be automatically regulated to guarantee that the outer wheel can not drag on the road surface, avoid the wearing and tearing of tire to aggravate, thereby guarantee the factor of safety of traveling vehicle, improve the operating life of reduction gear. The differential mechanism adopted in the automobile has large integral volume and complex structure, and is not suitable for all-terrain vehicles.

Based on this, applicant considered the design of a reference automotive rear axle assembly, incorporating a differential in the rear axle of an all-terrain vehicle to address cornering sideslip phenomena.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide an all-terrain vehicle rear axle assembly, which solves the problem that the existing all-terrain vehicle is easy to sideslip when turning with a rear axle as a whole.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The rear axle assembly of the all-terrain vehicle comprises a left half axle and a right half axle which are coaxially arranged, a differential mechanism assembly connected with the left half axle and the right half axle is arranged between the left half axle and the right half axle, the rear axle assembly also comprises a universal transmission shaft, a driving gear shaft and a driven gear, the lower end of the universal transmission shaft is connected with the upper end of the driving gear shaft, the driven gear is meshed with teeth on the driving gear shaft, and the driven gear is sleeved on a differential mechanism shell of the differential mechanism assembly and is fixedly connected with the differential mechanism shell; the differential mechanism assembly comprises a left driving gear, a right driving gear and two planetary gears which are vertically distributed and are arranged in a differential mechanism shell, wherein the left driving gear is sleeved at one end of a left half shaft extending into the differential mechanism shell and is fixedly connected with the left half shaft, the right driving gear is sleeved at one end of a right half shaft extending into the differential mechanism shell and is fixedly connected with the right half shaft, and the planetary gears are fixed on the inner side of a driven gear and are arranged between the left driving gear and the right driving gear and are simultaneously meshed with the left driving gear and the right driving gear. In this way, after being transmitted to the driving gear shaft through the universal transmission shaft, the power is sequentially transmitted to the driven gear, the transmission shell, the planetary gear and the left and right driving gears, and finally, the power is output to the left half shaft and the right half shaft through the left driving gear and the right driving gear. The middle part of the power output is provided with the differential mechanism assembly, when the vehicle turns, the inner side wheels can generate larger resistance, the two side half shafts are stressed differently, so that the planetary gears in the middle can generate autorotation, the two side half shafts have rotating speed difference, and the outer side is faster than the inner side wheels, therefore, the vehicle can turn smoothly, and the sideslip phenomenon can not occur. The driven gear is directly fixed on the differential mechanism shell, and the size of the differential mechanism shell in rear axle transmission can be effectively reduced, so that the structure is more compact, the weight of the rear axle can be effectively reduced, and the rear axle is suitable for all-terrain vehicles.

Furthermore, the lower end circumference of the driving gear shaft is provided with bevel gears, and the driven gear is a bevel gear. Thus, the direction of the transmission output can be changed through the meshing transmission of the bevel gears.

Further, a brake is sleeved at the middle part of the left half shaft and/or the middle part of the right half shaft. In this way, the rear axle has double braking, enabling double braking.

Further, the left driving gear is connected with a left half shaft spline, and the right driving gear is connected with a right half shaft spline; the middle part of the differential mechanism shell is also provided with a planetary wheel shaft fixedly connected with the differential mechanism shell, and two planetary gears are sleeved on the planetary wheel shaft. Thus, when the left and right driving gears are rotated, the half shafts on the corresponding sides are also rotated together.

Further, an assembly box is arranged outside the differential shell, and the driven gear and the differential shell are completely covered by the assembly box; the left side and the right side of the assembly box are respectively provided with a bridge pipe fixedly connected with the assembly box, and a rear bottom fork is fixedly connected with the two bridge pipes. Therefore, the assembly box can be fixed with the rear bottom fork to form a support for the differential mechanism, and meanwhile, the assembly box is connected with the rear bottom fork to form a closed space to protect the whole transmission mechanism in the rear axle.

Further, the rear bottom fork comprises a transversely arranged lining pipe, the middle part of the lining pipe is fixedly connected with a vertical pipe communicated with the lining pipe, and left and right mounting brackets connected with the vertical pipe are arranged on the left and right sides of the vertical pipe; the left mounting bracket and the right mounting bracket are distributed in a splayed shape, and the lower ends of the left mounting bracket and the right mounting bracket are respectively clamped and fixed on bridge pipes at the corresponding sides; the universal transmission shaft and the driving gear shaft are arranged in the vertical pipe, and the lower end of the vertical pipe is fixedly connected with the assembly box. In this way, the vertical pipe can be used for cladding the universal transmission shaft and the driving gear shaft of power input and is fixedly connected with the assembly box. Two mounting brackets on the rear bottom fork can be fixedly connected with bridge pipes on two sides of the assembly box, and the rear axle transmission mechanism is protected and supported through the bottom fork and the assembly box. The left mounting bracket and the right mounting bracket in the rear bottom fork are distributed in a splayed shape, so that the interval between the lower ends is larger, and the formed support is more stable.

Furthermore, the lower ends of the left mounting bracket and the right mounting bracket are fixedly provided with mounting plates which are clamped and fixed on the bridge pipes at the corresponding sides, the lower end of each mounting plate is provided with a U-shaped bayonet, and the U-shaped bayonet is clamped on the bridge pipes at the corresponding sides and is welded and fixed with the bridge pipes; the lower end of the vertical pipe is provided with a box body installation seat which is propped against the upper end of the assembly box and is fixedly connected through a fastener. Like this, the box mount pad that the riser lower extreme set up can be convenient for assemble fixed connection between case and the riser, and the U-shaped bayonet socket that sets up on the mounting panel can be convenient for the mounting panel be connected with the bridge pipe.

Drawings

FIG. 1 is a schematic cross-sectional view of a power transmission mechanism in an ATV rear axle assembly according to an embodiment;

fig. 2 is a schematic cross-sectional view of an all-terrain vehicle rear axle assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-2, the rear axle assembly of the all-terrain vehicle provided by the embodiment comprises a left half axle 9, a right half axle 10, a universal transmission shaft 1, a driving gear shaft 2 and a driven gear 4, wherein the differential assembly connected with the left half axle 9 and the right half axle 10 is arranged between the left half axle 9 and the right half axle 10, the lower end of the universal transmission shaft 1 is connected with the upper end of the driving gear shaft 2, the driven gear 4 is meshed with teeth on the driving gear shaft 2, and the driven gear 4 is sleeved on a differential shell 3 of the differential assembly and is fixedly connected with the differential shell 3; the differential mechanism assembly comprises a left driving gear 7, a right driving gear 8 and two planetary gears 5 which are vertically distributed, wherein the left driving gear 7 is sleeved at one end of a left half shaft 9 extending into the differential mechanism housing 3 and fixedly connected with the left half shaft 9, the right driving gear 8 is sleeved at one end of a right half shaft 10 extending into the differential mechanism housing 3 and fixedly connected with the right half shaft 10, and the planetary gears 5 are fixed at the inner side of a driven gear 4, are arranged between the left driving gear 7 and the right driving gear 8 and simultaneously meshed with the left driving gear 7 and the right driving gear 8. In this way, the power is transmitted to the driving gear shaft 2 via the universal transmission shaft 1, then sequentially transmitted to the driven gear 4, the transmission housing, the planetary gear 5 and the left and right driving gears 8, and finally output to the left half shaft 9 and the right half shaft 10 via the left driving gear 7 and the right driving gear 8. The middle part of the power output is provided with the differential mechanism assembly, when the vehicle turns, the inner side wheels can generate larger resistance, so that the two side half shafts are stressed differently, the middle planetary gear 5 can further generate autorotation, the two side half shafts have rotating speed difference, the outer side is faster than the inner side wheel, the vehicle can turn smoothly, and sideslip phenomenon can not occur. The driven gear 4 is directly fixed on the differential mechanism shell 3, and the size of the differential mechanism shell 3 in rear axle transmission can be effectively reduced, so that the structure is more compact, the weight of a rear axle can be effectively reduced, and the rear axle is suitable for all-terrain vehicles. In a specific application, if the vehicle runs straight, the planetary gear 5 revolves around only the driven gear 4 and drives the driving gear and the right driving gear to rotate together.

In order to facilitate the rotation of the differential case 3, the left and right sides of the differential case 3 are cylindrical, have smaller diameters, and are sleeved with bearings on the left and right sides of the differential case 3.

Specifically, the lower end of the driving gear shaft 2 in this embodiment is circumferentially provided with bevel gears, and the driven gear 4 is a bevel gear. Thus, the direction of the transmission output can be changed through the meshing transmission of the bevel gears.

For braking, a brake 14 is fitted in the middle of the left half shaft 9. The all-terrain vehicle with the structure is braked when running, and the left brake is decelerated until the speed is zero, so that the left connecting disc connected with the left brake disc, the left half shaft connected with the left connecting disc and the left rear wheel connected with the left half shaft are driven to have zero speed, and the right rear wheel connected with the right half shaft keeps a certain speed to move forwards due to no braking, so that the right rear wheel takes the left rear wheel as an origin turning circle.

In a specific implementation, the brakes 14 may be provided on both the left half shaft 9 and the right half shaft 10, so that the rear axle has double braking, enabling double-sided braking. The left side stopper includes left brake disc and left connection pad, and the right side stopper includes right brake disc and right connection pad, and left brake disc is connected with left connection pad, left connection pad is connected with left semi-axis, and left semi-axis is connected with left rear wheel, and right brake disc is connected with right semi-axis, and right semi-axis is connected with right rear wheel, braking left and right brake disc simultaneously when driving to drive left and right rear wheel and slow down simultaneously until the speed is zero, avoided only 1 brake disc and take the unsafe factor that the ATV of differential mechanism takes place the rim phenomenon and bring when braking.

Further, the left driving gear 7 is in spline connection with the left half shaft 9, and the right driving gear 8 is in spline connection with the right half shaft 10; the middle part of the differential mechanism shell 3 is also provided with a planetary wheel shaft 6 fixedly connected with the differential mechanism shell, and two planetary gears 5 are sleeved on the planetary wheel shaft 6. Thus, when the left and right drive gears 8 are rotated, the half shafts on the corresponding sides are also rotated together.

Further, an assembly box 11 is arranged outside the differential case 3, and the assembly box 11 completely covers the driven gear 4 and the differential case 3; the left side and the right side of the assembly box 11 are respectively provided with a bridge pipe 12 fixedly connected with the assembly box, and a rear bottom fork 13 is fixedly connected with the two bridge pipes 12. In this way, the assembly box 11 can be fixed with the rear bottom fork 13 to form a support for the differential mechanism, and meanwhile, the assembly box is connected with the rear bottom fork 13 to form a closed space to protect the whole transmission mechanism in the rear axle.

Further, the rear bottom fork 13 includes a lining tube 131 transversely arranged, a vertical tube 132 fixedly connected to the middle of the lining tube 131, and a left mounting bracket 133 and a right mounting bracket 134 connected to the left and right sides of the vertical tube 132; the left mounting bracket 133 and the right mounting bracket 134 are distributed in a splayed shape, and the lower ends of the left mounting bracket 133 and the right mounting bracket 134 are respectively clamped and fixed on the bridge pipe 12 at the corresponding side; the universal transmission shaft 1 and the driving gear shaft 2 are arranged in the vertical pipe 132, and the lower end of the vertical pipe 132 is fixedly connected with the assembly box 11. In this way, the stand pipe 132 can be used to cover the universal drive shaft 1 and the drive gear shaft 2 of the power input, and is connected and fixed with the fitting box 11. The two mounting brackets on the rear bottom fork 13 can be fixedly connected with the bridge pipes 12 on the two sides of the assembly box 11, and the rear axle transmission mechanism is protected and supported by the bottom fork and the assembly box 11. The left mounting bracket 133 and the right mounting bracket 134 in the rear bottom fork 13 are distributed in a splayed shape, so that the interval between the lower ends is larger, and the formed support is more stable.

Further, mounting plates which are clamped and fixed on the bridge pipes 12 at the corresponding sides are fixedly arranged at the lower ends of the left mounting bracket 133 and the right mounting bracket 134, and a U-shaped bayonet is arranged at the lower end of each mounting plate and is clamped on the bridge pipe 12 at the corresponding side and is welded and fixed with the bridge pipe 12; a box mounting seat is arranged at the lower end of the vertical pipe 132, and the box mounting seat is propped against the upper end of the assembly box 11 and is fixedly connected through a fastener. Thus, the box body mounting seat arranged at the lower end of the vertical pipe 132 can facilitate the fixed connection between the assembly box 11 and the vertical pipe 132, and the U-shaped bayonet arranged on the mounting plate can facilitate the connection between the mounting plate and the bridge pipe 12.

The upper end of the left mounting bracket 133 is welded and fixed with the lining pipe 131, a reinforced connecting seat is arranged between the left mounting bracket 133 and the vertical pipe 132, the upper end of the reinforced connecting seat is covered on the lining pipe 131 and welded and fixed with the lining pipe 131, and the left side and the right side of the reinforced connecting seat are respectively wrapped on the upper end of the left mounting bracket 133 and the vertical pipe 132 and welded and fixed with the left mounting bracket 133 and the right mounting bracket 134; meanwhile, a reinforcing pipe 135 is provided between the left mounting bracket 133 and the vertical pipe 132. The upper end of the right mounting bracket 134 is welded and fixed with the lining pipe 131 or the vertical pipe 132, a reinforcing box 136 is also connected between the right mounting bracket 134 and the vertical pipe 132, the left side of the reinforcing box 136 is fixed with the vertical pipe 132, and the upper end and the right side of the reinforcing box 136 are clamped on the right mounting bracket 134 and welded and fixed with the right mounting bracket 134. After adopting above-mentioned structure, all welded fastening between left installing support 133 and the inside lining pipe 131, between left installing support 133 and the riser 132, can pass through riser 132 and the outside force that the inside lining pipe 131 received with the rear axle and transmit in the frame. The mode of welded fastening, fixed knot constructs also comparatively firm, and the reinforced connection seat that sets up is convenient for not only welded fastening between the pipe fitting, can also further strengthen the structure of junction. The reinforcing box 136 can effectively increase the connection strength between the upper end of the right mounting bracket 134 and the vertical pipe 132, so that the overall structure is more stable.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the present utility model, and all such modifications and equivalents are included in the scope of the claims.

Claims (7)

1. The rear axle assembly of the all-terrain vehicle comprises a left half axle and a right half axle which are coaxially arranged, and a differential mechanism assembly connected with the left half axle and the right half axle is arranged between the left half axle and the right half axle; the differential mechanism assembly comprises a left driving gear, a right driving gear and two planetary gears which are vertically distributed and are arranged in a differential mechanism shell, wherein the left driving gear is sleeved at one end of a left half shaft extending into the differential mechanism shell and is fixedly connected with the left half shaft, the right driving gear is sleeved at one end of a right half shaft extending into the differential mechanism shell and is fixedly connected with the right half shaft, and the planetary gears are fixed on the inner side of a driven gear and are arranged between the left driving gear and the right driving gear and are simultaneously meshed with the left driving gear and the right driving gear.

2. The all-terrain vehicle rear axle assembly of claim 1, wherein the lower end of the drive gear shaft is circumferentially provided with bevel gears, and the driven gear is a bevel gear.

3. The all-terrain vehicle rear axle assembly of claim 1 or 2, wherein a brake is provided in the middle of the left axle shaft and/or the middle of the right axle shaft.

4. The all-terrain vehicle rear axle assembly of claim 3, wherein the left drive gear is in splined connection with a left axle shaft and the right drive gear is in splined connection with a right axle shaft; the middle part of the differential mechanism shell is also provided with a planetary wheel shaft fixedly connected with the differential mechanism shell, and two planetary gears are sleeved on the planetary wheel shaft.

5. The all-terrain vehicle rear axle assembly of claim 1, 2 or 4, further comprising an assembly box outside the differential housing, the assembly box completely encasing the driven gear and differential housing; the left side and the right side of the assembly box are respectively provided with a bridge pipe fixedly connected with the assembly box, and a rear bottom fork is fixedly connected with the two bridge pipes.

6. The all-terrain vehicle rear axle assembly of claim 5, wherein the rear bottom fork comprises a transversely arranged lining pipe, a vertical pipe communicated with the lining pipe is fixedly connected to the middle part of the lining pipe, and a left mounting bracket and a right mounting bracket connected with the vertical pipe are arranged on the left side and the right side of the vertical pipe; the left mounting bracket and the right mounting bracket are distributed in a splayed shape, and the lower ends of the left mounting bracket and the right mounting bracket are respectively clamped and fixed on bridge pipes at the corresponding sides; the universal transmission shaft and the driving gear shaft are arranged in the vertical pipe, and the lower end of the vertical pipe is fixedly connected with the assembly box.

7. The all-terrain vehicle rear axle assembly of claim 6, wherein the lower ends of the left mounting bracket and the right mounting bracket are fixedly provided with mounting plates which are clamped and fixed on the corresponding side bridge pipes, and the lower end of each mounting plate is provided with a U-shaped bayonet which is clamped on the bridge pipe on the corresponding side and is welded and fixed with the bridge pipe; the lower end of the vertical pipe is provided with a box body installation seat which is propped against the upper end of the assembly box and is fixedly connected through a fastener.