WO2018233181A1

WO2018233181A1 - Semitrailer rear-wheel axle lifting device

Info

Publication number: WO2018233181A1
Application number: PCT/CN2017/109395
Authority: WO
Inventors: 朱其安; 李光鑫; 别宜春; 李星; 赵威
Original assignee: 扬州市伏尔坎机械制造有限公司
Priority date: 2017-06-21
Filing date: 2017-11-03
Publication date: 2018-12-27
Also published as: CN207191218U

Abstract

A semitrailer rear-wheel axle lifting device, comprising a lifting oil cylinder (1) and a lifting rocker arm (2) which are hingedly connected to a frame (3); one end of the lifting rocker arm (2) is hingedly connected to the frame (3), and the other end is hingedly connected to the lifting oil cylinder (1); an axle (4) is hingedly connected to the lifting rocker arm (2); and a steering device (11) adopting spherical hinge is further provided on the axle 4. By providing the lifting oil cylinder (1) and the lifting rocker arm (2), when the semitrailer is in idle load, the hydraulic pressure of the lifting oil cylinder (1) is changed to pull up the lifting rocker arm (2) so as to suspend wheels to reduce the wheel friction and oil consumption.

Description

Rear-wheel axle lifting device for semi-trailer

Technical field

The utility model relates to the field of semi-trailers, in particular to a lifting device for a rear axle axle of a semi-trailer.

Background technique

At present, domestic highways transport large-scale components and heavy-weight items, and most of them use freight car semi-trailers. Generally, semi-trailers are equipped with two-axle or three-axle rear-wheel axles. When the semi-trailer is heavy and no-load, the axles of each axle are in contact with the ground, and all the wheels are rolling and advancing with the road surface. It is uneconomical when the load is empty. The tire wears more, the resistance is high, and the running cost is high.

Utility model content

The purpose of the utility model is to provide a rear axle axle lifting device for a semi-trailer that can suspend a rear wheel axle of a semi-trailer.

In order to achieve the above object, the technical proposal of a rear wheel axle bridge pulling device for a semi-trailer is:

A rear axle axle lifting device for a semi-trailer comprises a lifting cylinder and a lifting rocker hinged to the frame, one end of the lifting rocker arm is hinged to the frame, and the other end is hinged with the pulling cylinder, the vehicle The bridge is hinged to the lifting arm. When transporting by empty car, the lifting cylinder lifts the axle of the previous or the latter group through the lifting rocker arm, reducing the friction between the axle and the ground and reducing the fuel consumption.

Further, the frame is equipped with four axles hinged to the frame, and the two axles are arranged coaxially, and the front and rear axles are arranged in parallel, which are respectively a left front axle, a right front axle, a left rear axle and Right rear axle, front and rear two sets of axles, at least one set of axles is provided with a lifting rocker arm, and the axle is hinged with the lifting rocker arm.

Further, the axle is provided with a steering device, the steering device includes a link fixing device and a driving device; the driving device includes a cylinder and a support base; the support base passes through the pivot shaft and the frame Pivot, the support base is rotatable about the pivot shaft; one end of the cylinder is hinged to the frame, and the other end is hinged with the support base for driving the support base to rotate; the connecting rod fixing device comprises a support base The four hinged links are a left front link, a right front link, a left rear link, and a right rear link. One end of the four links is hinged to the support base, and the other end of the left front link is hinged to the left front bridge. The other end of the right front link is hinged to the right front axle, the other end of the left rear link is hinged to the left rear axle, and the other end of the right rear link is hinged to the right rear axle. By changing the hydraulic pressure, the piston rod of the cylinder is extended or contracted, and the driving force is applied to the four connecting rods through the supporting base, and the connecting rod is fixed on the axle, thereby driving the rear wheel steering and maintaining the turning radius of the rear wheel. Same as the front wheel.

Further, the four ends of the four links are spherically hinged. The spherical articulation avoids interference when lifting the axle and improves the lifting height of the axle.

Further, the driving device comprises two oil cylinders respectively a left oil cylinder and a right oil cylinder, and the two oil cylinders are respectively disposed on the left and right sides of the support base, and the two are linked to drive the support base to rotate. The two cylinders are provided to drive the support base to rotate, which improves the stability of the support base, and can reduce the diameter of the cylinder and facilitate the arrangement of the cylinders.

Further, the four axles are fixed with a steering arm, and the four steering arms are hinged correspondingly to the four links.

Further, based on the pivot axis of the support base, the left front link is hinged at the right front of the support base, the left front link is hinged above the support base, and the right front link is hinged to the support base. At the left front of the seat, the right front link is hinged below the support base. Said The left rear link is hinged to the left rear end of the support base, the left rear link is hinged below the support base, the right rear link is hinged to the right rear end of the support base, and the right rear link is hinged to the support Below the pedestal. The four hinge points are arranged to effectively articulate the connecting rod and the supporting base, and the steering angle of the supporting base can be accurately and efficiently transmitted to the connecting rod.

Further, based on the rotation center of the support base, the left cylinder is hinged at the left rear of the support base, and a positioning pin for limiting the maximum steering is provided beside the hinge point, and the right cylinder is hinged to the support base. At the right rear of the seat, there is a locating pin next to the hinge point to limit the maximum steering. The setting of the positioning pin limits the maximum steering angle and eliminates safety hazards.

Compared with the prior art, the beneficial effects of the utility model are:

By setting the lifting cylinder and the lifting rocker arm, the utility model can change the hydraulic pressure of the lifting cylinder when the semi-trailer is unloaded, so that the lifting rocker arm is pulled up, the lifting rocker arm and the axle are hinged, thereby the wheel Suspension reduces the friction of the wheels and reduces fuel consumption.

DRAWINGS

1 is a schematic structural view of a lifting device for a rear axle axle of a semi-trailer according to the present invention.

2 is a schematic structural view of a steering device of a rear axle axle pulling device for a semi-trailer according to the present invention.

Figure 3 is a right side view of Figure 2.

The figure shows: 1, lifting cylinder; 2, lifting rocker arm; 3, frame; 4, axle; 5, lifting rocker hinge point; 11, steering device; 6, support base; Right cylinder; 8, left cylinder; 61, left front hinge point; 62, right front hinge point; 63, pivot shaft; 64, right rear hinge Contact; 65, left rear hinge point; 66, left rear hinge point; 67, right rear hinge point; 68, positioning pin; 91, left front link; 92, right front link; 93, left rear link; , right rear link; 10, steering arm; 101, steering arm fixed contact point.

Detailed ways

The present invention will be further clarified with reference to the accompanying drawings and specific embodiments. It is understood that the embodiments are only used to illustrate the invention and not to limit the scope of the present invention. After reading the present invention, those skilled in the art will Modifications of the various equivalents of the invention are intended to be within the scope of the appended claims.

As shown in FIG. 1 to FIG. 3, a rear axle axle pulling device for a semi-trailer includes a frame 3, and the frame 3 is mounted with four axles hinged to the frame 3, and the two axles are the same group. Axis setting, the front and rear two sets of axles are arranged in parallel, which are left front axle, right front axle, left rear axle and right rear axle, front and rear two sets of axles, each axle 4 is provided with lifting rocker arm 2, axle 4 It is hinged with the lifting rocker arm 2, one end of the lifting rocker arm 2 is hinged to the frame 3, and the other end is hinged with the pulling cylinder 1, the lifting oil cylinder 1 is hinged to the frame 3 at one end, and the other end is hinged to the lifting rocker arm 2 . During the transportation of the empty car, the piston rod of the pulling cylinder 1 is controlled to retract, and the pulling force acts on the lifting rocker arm 2 hinged to the lifting cylinder 1, and the lifting rocker arm 2 is hinged with the frame 3, and is pulled around the pulling frame. The arm hinge point 5 rotates, and the axle 4 hinged to the lifting rocker arm 2 is lifted to reduce the friction between the wheel and the ground, thereby reducing fuel consumption.

As shown in FIGS. 2 and 3, the frame 3 is provided with a steering device 11 including a link fixing device and a driving device. The driving device includes a left cylinder 8, a right cylinder 7, and a support base 6. The support base 6 is pivotally connected to the frame through a pivot shaft 63, and the support base is rotatable about the pivot shaft 63. The left cylinder 8 and the right cylinder 7 are hinged to the frame 3 at one end, and the other end is The support base 6 is hinged for driving the support base 6 to rotate, the left cylinder 8 is hinged at the left rear portion 65 of the support base 6, and a positioning pin 68 for limiting the maximum steering is provided beside the hinge point 65. The right cylinder 7 is hinged at the right rear portion 64 of the support base 6, and a positioning pin 68 for limiting the maximum steering is provided beside the hinge point 64. The setting of the positioning pin 68 limits the maximum steering angle and eliminates safety hazards.

As shown in FIGS. 2 and 3, the link fixing device includes four links and a steering arm 10 hinged to the support base 6, and the four links are a left front link 91, a right front link 92, and a left rear link, respectively. 93. Right rear link 94. Based on the pivot shaft 63 supporting the base, the left front link 91 is hinged at the right front 62 of the support base, the left front link 91 is hinged above the support base 6, and the right front link 92 is hinged to the support base 6. At the left front 61, the right front link 92 is hinged below the support base 6. The left rear link 93 is hinged to the left rear end 66 of the support base 6, the left rear link 93 is hinged below the support base 6, and the right rear link 94 is hinged to the right rear end 67 of the support base 6, right rear The rod 94 is hinged below the support base 6. The other ends of the four links are respectively hinged with the four steering arms 10, and the steering arm 10 is fixedly coupled to the four axles. The piston rod of the cylinder is extended or contracted by changing the oil pressure, and the driving force is applied to the four connecting rods through the supporting base 6, and the connecting rod is fixed on the axle, thereby driving the rear wheel to turn and maintaining the rear wheel. The turning radius is the same as the front wheel.

As shown in Figure 3, the ends of the four links are spherically hinged. The spherical articulation avoids interference when lifting the axle and improves the lifting height of the axle.

Vehicle empty condition:

When the semi-trailer is unloaded, the piston rod of the pulling cylinder 1 is retracted by the hydraulic system, and the pulling force acts on the lifting rocker arm 2 hinged to the pulling cylinder 1, lifting the rocker arm 2 and the frame 3 Hinged, rotating clockwise around the lifting rocker hinge point 10, lifting the axle 9 hinged with the lifting rocker arm 7, reducing the friction between the wheel and the ground, reducing fuel consumption.

Vehicle full load situation:

When the semi-trailer is fully loaded, the pulling cylinder 6 is controlled by the hydraulic system so that the piston rod of the pulling cylinder 6 is extended. Correspondingly, the lifting rocker arm 7 hinged to the lifting cylinder 6 rotates counterclockwise around the lifting rocker hinge point 10, the lifting rocker arm 7 is hinged to the axle 9, and the wheel is lowered to contact the ground.

Left turn of the vehicle:

When the semi-trailer is to turn left, the hydraulic pressure of the left cylinder 8 is adjusted by the hydraulic system of the semi-trailer, the piston rod of the left cylinder 8 is extended by a corresponding distance, the hydraulic pressure of the right cylinder 7 is adjusted, and the piston rod of the right cylinder 7 is retracted accordingly. distance.

Since the output ends of the left and right cylinders 8 and 7 are hinged to the support base, the piston rod of the left cylinder 8 is extended, and the piston rod of the right cylinder 7 is retracted to rotate the support base 6 by a corresponding angle about the pivot shaft. The support base 6 and the four link hinges, the steering angle of the support base 6, will be transmitted to the four link mechanisms. The connecting rod and the steering arm 10, the steering arm 10 is fixed to the axle, and the steering angle of the connecting rod is transmitted to the axle through the steering arm 10. Through the axle, the steering angle is finally transmitted to the semi-trailer wheel set, and the left turn of the rear wheel is completed, thereby maintaining the same steering angle as the front wheel, and completing the steering of the semi-trailer.

Right turn of the vehicle:

When the right turn is required, the corresponding adjustment of the piston rod of the left cylinder 8 is retracted, and the piston rod of the right cylinder 7 is extended. As with the left turn, the steering angle is transmitted through a series of mechanisms, and the steering angle is finally transmitted to the rear wheel set of the semi-trailer, completing the right turn of the rear wheel so as to remain the same as the front wheel A steering angle completes the steering of the semi-trailer.

Claims

A rear axle axle lifting device for a semi-trailer, comprising: a pulling cylinder and a lifting rocker arm hinged to the frame, one end of the lifting rocker arm is hinged to the frame, and the other end is lifted The cylinder is hinged and the axle is hinged to the lifting arm.
A rear axle axle lifting device for a semi-trailer according to claim 1, wherein the frame is mounted with four axles hinged to the frame, and the two axles are coaxially arranged. The front and rear two sets of axles are arranged in parallel, which are left front axle, right front axle, left rear axle and right rear axle. The front and rear two axles are equipped with at least one set of axles with lifting rocker arms, and the axles and lifting rocker arms are hinged. .
A rear axle axle pulling device for a semi-trailer according to claim 2, wherein said frame is provided with a steering device, said steering device comprising a link fixing device and a driving device; said driving device The utility model comprises a cylinder and a support base; the support base is pivotally connected to the frame by a pivot shaft, and the support base is rotatable about the pivot shaft; the cylinder is hinged to the frame at one end and hinged to the support base at the other end For driving the support base to rotate; the link fixing device comprises four links hinged to the support base, respectively, a left front link, a right front link, a left rear link, a right rear link, and four links One end of the rod is hinged to the support base, the other end of the left front link is hinged to the left front bridge, the other end of the right front link is hinged to the right front axle, the other end of the left rear link is hinged to the left rear axle, and the right rear link is another One end is hinged to the right rear axle.
A rear axle axle lifting device for a semi-trailer according to claim 3, wherein the four ends of the four links are spherically hinged.
A rear axle axle lifting device for a semi-trailer according to claim 3, wherein said driving device comprises two oil cylinders, a left cylinder and a right cylinder, respectively. The cylinders are respectively disposed on the left and right sides of the support base, and the two are linked to drive the support base to rotate.
A rear axle axle lifting device for a semi-trailer according to claim 3, wherein said four axles are each fixed with a steering arm, and said four steering arms correspond to four links Hinged.
A lifting device for a rear axle axle of a semi-trailer according to claim 3, wherein: the left front link is hinged to the right front of the support base, and the left front is based on a pivot axis of the support base. The link is hinged above the support base, the right front link is hinged at the left front of the support base, the right front link is hinged below the support base, and the left rear link is hinged to the left of the support base The rear end is hinged below the support base, the right rear link is hinged to the right rear end of the support base, and the right rear link is hinged below the support base.
A lifting device for a rear axle axle of a semi-trailer according to claim 5, wherein: the left cylinder is hinged at the left rear of the support base, and is hinged with the pivot shaft of the support base as a base point A locating pin for limiting the maximum steering is provided beside the point, the right cylinder is hinged at the right rear of the support base, and a locating pin for limiting the maximum steering is provided beside the hinge point.