阅读说明：本技术 一种越野叉车后转向驱动桥 (Rear steering drive axle of cross-country forklift ) 是由 阴勇 韩振武 李娟� 姜广涛 张庆华 张国 李焕 于 2020-06-29 设计创作，主要内容包括：本发明涉及一种越野叉车后转向驱动桥,属于工程机械配件技术领域。所述后转向驱动桥包括桥壳、主减速总成、转向节总成轮毂和轮毂,所述桥壳中空,内穿有转向驱动轴,主减速总成位于桥壳的中部,齿轮连接转向驱动轴的中部,两端分别通过转向节总成连接轮毂,桥壳中部连接有安装架,后侧连接有液压油缸,液压油缸的液压杆的末端分别铰接两侧转向接头的一端,轮毂的轮边半轴分别穿过轴管并与之相对转动连接,并分别通过转向件与转向驱动轴的两端铰接,转向驱动轴的两端与桥壳内部空腔的两端分别设有两道挡圈,两端的两道挡圈之间设有氟橡胶油封。本发明的后转向驱动桥扭矩大,负载能力强,可应用于野外环境。(The invention relates to a rear steering drive axle of a cross-country forklift, belonging to the technical field of engineering machinery accessories. The rear steering drive axle comprises an axle housing, a main speed reducing assembly, a steering knuckle assembly hub and a wheel hub, a steering drive shaft penetrates the axle housing in the hollow cavity, the main speed reducing assembly is located in the middle of the axle housing, the gear is connected with the middle of the steering drive shaft, the two ends of the gear are respectively connected with the wheel hub through the steering knuckle assembly, the middle of the axle housing is connected with an installation frame, the rear side of the axle housing is connected with a hydraulic oil cylinder, the tail end of a hydraulic rod of the hydraulic oil cylinder is respectively hinged to one end of a steering joint on two sides, wheel-side half shafts of the wheel hubs respectively penetrate through an axle tube and are connected with the axle tube in a relative rotating mode, the two ends of the steering drive shaft are respectively hinged to the two ends of an. The rear steering drive axle has large torque and strong load capacity, and can be applied to the field environment.)

1. The utility model provides a cross country fork truck rear steering drive axle, its characterized in that, rear steering drive axle includes axle housing, main speed reduction assembly, left knuckle assembly, right knuckle assembly, left wheel hub and right wheel hub, the axle housing cavity has worn the steering drive axle in, main speed reduction assembly is located the middle part of axle housing, the middle part of gear connection steering drive axle, the left side end of axle housing connects left wheel hub through left knuckle assembly, the right side end of axle housing connects right wheel hub through right knuckle assembly, the upside at axle housing middle part is connected with the mounting bracket, the rear side of mounting bracket is connected with horizontal left hydraulic cylinder and the right hydraulic cylinder, the end of the hydraulic stem of two hydraulic cylinder articulates the one end of both sides steering joint respectively, left knuckle assembly and right knuckle assembly structure is the same, including the interior steering card of outer steering card and axle housing tip, the steering gear comprises an outer steering clamp and an inner steering clamp, wherein the outer steering clamp and the inner steering clamp are U-shaped, the rear sides of the upper ends of the outer steering clamp and the inner steering clamp at two sides are respectively provided with a steering plate, the other ends of steering joints at two sides are respectively hinged with the steering plates at two sides, the outer steering clamp is integrally wrapped at the outer side of the inner steering clamp, the upper clamp arm and the lower clamp arm of the outer steering clamp and the inner steering clamp are respectively provided with a pin hole correspondingly, the upper side and the lower side of the outer steering clamp and the upper side and the lower side of the inner steering clamp are respectively hinged through a steering knuckle pressing shaft, the middle part of the bottom side arm of the outer steering clamp is provided with a through hole, a shaft tube is fixed through a bolt, the two side ends of the steering driving shaft are respectively positioned in the inner steering clamps at two ends of the axle housing, wheel side half shafts of a left wheel hub and a right wheel hub respectively penetrate through the shaft tube and are connected with the, and a fluororubber oil seal is arranged between the two check rings at the two ends.

2. The off-road forklift rear steering drive axle according to claim 1, characterized in that the left hub and the right hub have the same structure, and further comprise a hub shell and a hub reduction assembly, the hub shell is connected with the axle tube through a first bearing and a second bearing, the hub reduction assembly comprises a gear ring, a planet carrier, a sun gear, a planet gear and a planet gear axle, the outer end of the planet carrier is connected with the end of the hub shell through a bolt, the outer end of the hub reduction assembly is provided with a sealing cover, and the edge of the sealing cover is fixed on the planet carrier through a circle of uniformly distributed bolts.

3. The off-road forklift rear steer-drive axle of claim 3, wherein said rear steer-drive axle has a final reduction ratio of 43/7, a wheel reduction ratio of 3.111, and a total reduction ratio of 19.11.

4. The off-road forklift rear steer-drive axle of claim 4, wherein said rear steer-drive axle has a maximum inside angle of 38.87 ° for the left and right knuckle assemblies and a maximum outside angle of 53 °.

5. The off-road forklift rear steer-drive axle of claim 1, wherein a first oil seal is provided between the wheel-side half shaft and the inboard end of the axle tube.

6. The off-road forklift rear steer-drive axle of claim 2, wherein a second oil seal is provided between the inboard end of the hub shell and the axle tube.

7. The off-road forklift rear steer-drive axle of claim 1, wherein the middle portions of the two hydraulic cylinders are fixedly connected to the left and right sides of the mounting frame through reinforcement members, respectively.

8. The off-road forklift rear steer-drive axle of claim 1, wherein opposing inner sides of the hub shells of said left and right hubs are provided with a plurality of reinforcing connecting plates.

9. The off-road forklift rear steer-drive axle of claim 1, wherein said axle housing body, said mounting bracket and said inner steer clips at said ends thereof are integrally cast.

10. The off-road forklift rear steering drive axle according to claim 1, wherein the two ends of the steering member are respectively provided with a U-shaped clamp, and the clamping directions of the U-shaped clamps at the two ends are arranged in a cross shape and respectively clamp the hinged drive shaft and the wheel side half shaft.

Technical Field

The invention relates to the technical field of engineering machinery accessories, in particular to a rear steering drive axle of a cross-country forklift.

Background

The existing forklift trucks on the market are all common forklift trucks, the driving bridge frame has small torque and limited loading capacity, the forklift trucks can be used on a flat road surface, the forklift trucks are not suitable for the environment with poor outdoor road conditions, and a steering drive axle with large loading capacity and large torque is urgently needed to enable the forklift trucks to adapt to the severe outdoor working condition environment.

Disclosure of Invention

In order to solve the problems in the prior art, the invention discloses a high-torque and high-load off-road forklift rear steering drive axle, which comprises an axle housing, a main speed reducing assembly, a left steering knuckle assembly, a right steering knuckle assembly, a left wheel hub and a right wheel hub, wherein the axle housing is hollow, a steering drive shaft penetrates through the axle housing, the main speed reducing assembly is positioned in the middle of the axle housing, a gear is connected with the middle part of the steering drive shaft, the left end of the axle housing is connected with the left wheel hub through the left steering knuckle assembly, the right end of the axle housing is connected with the right wheel hub through the right steering knuckle assembly, the upper side of the middle part of the axle housing is connected with an installation frame, the rear side of the installation frame is connected with a horizontally arranged left hydraulic oil cylinder and a right hydraulic oil cylinder, the tail ends of hydraulic rods of the two hydraulic oil cylinders are respectively hinged with one end of steering joints on two sides, and, the steering gear comprises an outer steering clamp and an inner steering clamp at the end part of an axle housing, wherein the outer steering clamp and the inner steering clamp are U-shaped, the rear sides of the upper ends of the outer steering clamps at two sides are respectively provided with a steering plate, the other ends of steering joints at two sides are respectively hinged with the steering plates at two sides, the outer steering clamp is integrally wrapped at the outer side of the inner steering clamp, the upper clamp arm and the lower clamp arm of the outer steering clamp and the inner steering clamp are respectively and correspondingly provided with a pin hole, the upper side and the lower side of the outer steering clamp and the upper side and the lower side of the inner steering clamp are respectively hinged through a steering knuckle pressing shaft, the middle part of the bottom side arm of the outer steering clamp is provided with a through hole, a shaft tube is fixed through a bolt, the two side ends of a steering driving shaft are respectively positioned in the inner steering clamps at two ends of the axle housing, wheel side half shafts of a left wheel hub and a right wheel hub respectively penetrate through the shaft tube and are connected with the shaft tubes in a rotating way and are respectively, and a fluororubber oil seal is arranged between the two check rings at the two ends.

Further, left side wheel hub is the same with right wheel hub structure, still includes wheel hub shell and wheel limit speed reduction assembly, the wheel hub shell with connect through first bearing and second bearing between the central siphon, wheel limit speed reduction assembly includes ring gear, planet wheel carrier, sun gear, 3 planet wheels and planet wheel axle, and the outside end of planet wheel carrier passes through the end connection of bolt and wheel hub shell, the outside end of wheel limit speed reduction assembly is equipped with the closing cap, the edge of closing cap is fixed on planet wheel carrier through the bolt of round equipartition.

Further, the rear steering axle has a final reduction ratio of 43/7, a wheel-side reduction ratio of 3.111, and a total reduction ratio of 19.11.

Further, the maximum inner rotation angle of the left steering knuckle assembly and the right steering knuckle assembly of the rear steering drive axle is 38.87 degrees, and the maximum outer rotation angle is 53 degrees.

Furthermore, a first oil seal is arranged between the wheel edge half shaft and the end part of the inner side of the shaft tube.

Furthermore, a second oil seal is arranged between the inner side end of the hub shell and the shaft tube.

Furthermore, the middle parts of the two hydraulic oil cylinders are fixedly connected to the left side and the right side of the mounting frame through reinforcing parts respectively.

Furthermore, the relative medial surface of the wheel hub shell of left wheel hub and right wheel hub is equipped with multichannel reinforcing connection board.

Further, the body of axle housing, mounting bracket and the interior steering card at both ends are integrated into one piece.

Furthermore, the two ends of the steering piece are respectively provided with a U-shaped clamp, the U-shaped clamps on the two sides are arranged in a cross shape and respectively clamp the hinged driving shaft and the wheel-side half shaft.

Compared with the prior art, the off-road forklift rear steering drive axle has the advantages that the axle housing body, the mounting frame on the axle housing body and the inner steering clamps at two ends of the axle housing body are integrally cast, so that the stability is high, and the load capacity is high; the steering assembly is controlled by the hydraulic oil cylinder to drive the wheel hub to steer inside and outside, the steering power is ensured, and enough inner and outer steering angle angles are ensured; a plurality of reinforcing connecting plates are arranged between the baffle of the wheel hub and the wheel edge half shaft, so that sufficient strength is ensured, and the load capacity of the drive axle is increased; the parts which are rotatably connected are sealed by fluororubber, so that the tightness of the connection part is improved.

Drawings

FIG. 1 is a schematic structural view of a rear steering drive axle of a cross-country forklift

FIG. 2 is a top view of a rear steer axle of a fork lift truck

In the figure, 1 axle housing, 2 main speed reducing assemblies, 3 left steering assemblies, 4 right steering assemblies, 5 left wheel hubs, 6 right wheel hubs, 7 left hydraulic oil cylinders, 8 right hydraulic oil cylinders, 9 mounting frames, 10 steering driving shafts, 11 inner steering clamps, 12 retaining rings, 13 fluororubber oil seals, 31 outer steering clamps, 32 steering parts, 33 steering knuckle shafts, 51-wheel half shafts, 52 wheel hub shells, 53 shaft tubes, 54 gear rings, 55 planetary gear frames, 56 sun gears, 57 planetary gear wheels, 58 planetary gear shafts, 59 end covers, 61 first oil seals, 62 second oil seals, 63 first bearings, 64 second bearings, 65 reinforcing connecting plates, 71 hydraulic rods, 72 steering joints and 73 steering plates

Detailed Description

The invention is further described with reference to the following figures and specific embodiments. The technical solutions in the embodiments of the present invention are clearly and completely described, and the described embodiments are only some embodiments, but not all embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the present patent discloses an embodiment of a rear steering drive axle of an off-road forklift truck, wherein the rear steering drive axle comprises an axle housing 1, a main speed reducing assembly 2, a left steering knuckle assembly 3, a right steering knuckle assembly 4, a left hub 5 and a right hub 6. The axle housing 1 is hollow, a steering driving shaft 10 penetrates through the axle housing 1, the middle part of the axle housing is a cylindrical raised cavity, and the main speed reducing assembly 2 is located in the middle cavity of the axle housing 1 and is connected with a middle gear of the steering driving shaft 10.

The left side end of axle housing 1 passes through left knuckle assembly 3 and connects left wheel hub 5, and the right side end of axle housing 1 passes through right knuckle assembly 4 and connects right wheel hub 6. The upside in axle housing 1 middle part is equipped with mounting bracket 9, and mounting bracket 9 and axle housing 1's body integrated into one piece. The rear side of the mounting frame 9 is connected with a left hydraulic oil cylinder 7 and a right hydraulic oil cylinder 8 which are horizontally arranged, the tail ends of hydraulic rods 71 of the two hydraulic oil cylinders are respectively hinged with one ends of steering joints 72 on two sides, and meanwhile the middle parts of the two hydraulic oil cylinders are respectively connected with the left side and the right side of the mounting frame 9 through reinforcing parts.

Left knuckle assembly 3 is the same with right knuckle assembly 4 structure, including the interior steering card 11 of the interior steering card 31 of outer steering card and axle housing 1 tip, the body integrated casting shaping of the interior steering card 11 and the axle housing 1 at axle housing 1 both ends. The outer steering clamp 31 and the inner steering clamp 11 are U-shaped, the rear sides of the upper clamp arms of the outer steering clamp 31 at the two sides are respectively provided with a steering plate 73 which is vertically arranged, the other ends of the steering joints 72 at the two sides are respectively hinged with the steering plates 73 at the two sides, and the outer steering clamp 31 is integrally wrapped at the outer side of the inner steering clamp 11. The upper clamping arm and the lower clamping arm of the outer transmission clamp 31 and the inner steering clamp 11 are respectively provided with a pin hole correspondingly and are hinged through a steering knuckle pressing shaft 33, and the steering knuckle pressing shaft 33 is fixed on the outer steering clamp 31 through a circle of bolt. The outer steering clip 31 has a through hole in the middle of the bottom side arm, in which a shaft tube 53 is fixed by a bolt. The two side ends of the steering driving shaft 11 are respectively positioned in the inner steering clamps 11 at the two ends, two check rings 12 are respectively arranged between the two ends of the steering driving shaft 10 and the two ends of the cavity in the axle housing 1, and a fluororubber oil seal 13 is arranged between the two check rings 12. The wheel-side half shafts 51 of the left hub 5 and the right hub 6 respectively penetrate through and are rotatably connected with the shaft tubes 53 on both sides, and are respectively hinged with both ends of the steering driving shaft 10 through the steering members 32. A ring of first oil seal 61 made of fluororubber is provided between the inner ends of both the wheel-side half shaft 51 and the shaft tube 53.

The two ends of the steering component 32 are respectively provided with a U-shaped clamp, the clamping directions of the U-shaped clamps at the two sides are arranged in a cross shape, and the U-shaped clamps at the two sides are respectively used for clamping and hinging the steering driving shaft 10 and the wheel-side half shaft 51.

The left wheel hub 5 and the right wheel hub 6 have the same structure, and further comprise a wheel hub shell 52 and a wheel hub reduction assembly, wherein the wheel hub shell 52 is rotatably connected with the axle tube 53 through a first bearing 63 and a second bearing 64, and a circle of second oil seal 62 made of fluororubber is arranged between the inner end of the wheel hub shell 52 and the axle tube 53.

The hub reduction assembly comprises a gear ring 54, a planet gear carrier 55, a sun gear 56, planet gears 57 and a planet gear shaft 58, wherein the sun gear 56 is sleeved on the hub half shaft 51, 3 planet gears 57 are uniformly distributed on the circumferential surface of the outer side of the sun gear and meshed with the sun gear, the 3 planet gears 57 are respectively sleeved on the planet gear shaft 58, and the 3 planet gears 57 are positioned on the inner side of the gear ring 54 and meshed with the gear ring 54. An end cover 59 is arranged at the outer side end of the hub reduction assembly, the end cover 59 is fixed on the planet wheel carrier 55 through bolts, and the outer side end of the planet wheel carrier 55 is connected with the end part of the hub shell 52 through bolts.

The opposite inner sides of the hub shell 52 of the left hub 5 and the right hub 6 are respectively provided with a plurality of reinforcing connecting plates 53.

The final drive ratio of steering transaxle behind fork lift truck that this patent designed is 43/7, and the wheel reduction ratio is 3.111, and the total reduction ratio is 19.11. The maximum inner rotation angle of the steering knuckle assemblies on the two sides is 38.87 degrees, and the maximum outer rotation angle is 53 degrees.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims and the description of the invention.