JPH04232181A - Assistant vehicle directional change device - Google Patents

Abstract

PURPOSE:To increase turning performance of a large-sized vehicle and assist directional change effectively by a steering device, by connecting rotatably an axle casing for rear wheels to a vehicle body and fixedly in lateral direction and providing a drive device for rotating. CONSTITUTION:In normal running, a lock pin 24 of a lock device 7 and a positioning pin 26 of a positioning device 8 are passed through a rotating seat 4 and a rotating supporting seat 5, respectively, to keep an axle casing 3 in a condition lateral to a chassis. On the other hand, in narrow curves, etc., a drive device 16 is operated after a vehicle is stopped temporarily. Namely, the lock pins 24, 24 are extracted from the rotating seat 4 by a hydraulic cylinder and the lever position pin 26 is extracted from a hole 28 of the rotating seat 4. Then hydraulic cylinders 21, 21 are started, and rams 20, 20 are telescoped to rotate the rotating seat 4 around a rotating shaft part 14. Thus rear wheels can be rotated in right and left directions together with the axle casing 3 to assist the change of direction of the vehicle.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direction change assisting device for improving the turning performance of large freight vehicles, truck cranes, etc.

0002

[Prior Art] Large vehicles generally used for construction work, etc. tend to become larger in order to improve transportation efficiency, and recently 11-ton truck class freight cars and truck cranes have been provided. .

[0003] These large vehicles have longer wheel bases and larger overall vehicle weights. Therefore, in order to make the steering of the vehicle simple and easy, power steering devices are employed to improve the steering performance.

0004

[Problem to be solved by the invention] However, in the case of large vehicles, there are many cases where it is impossible to enter due to road conditions, especially when there is a sharp curve on the road leading to the construction site. You may not be able to turn around and pass. Therefore, it goes without saying that the vehicles that can enter the construction site are determined depending on the road conditions, and whether or not large vehicles can smoothly enter the construction site has a great influence on the progress of the construction work. This is a problem that increases as vehicles become larger, and traditionally,
This is also a problem with large vehicles.

[0005] Therefore, the present invention has been made with the object of providing a direction change assisting device that can improve turning performance by being used in cases where a large vehicle cannot turn only by operating the steering wheel of the steering device. be.

[0006]

[Means for Solving the Problems] A direction change assisting device for a vehicle according to the present invention connects a rear wheel axle casing to the vehicle body in a rotatable and fixable manner in a state where the two are perpendicular to each other, and connects the axle casing It is characterized by having a drive device for rotating the.

[0007]

[Operation] When the vehicle is running normally, the axle casing is fixed perpendicular to the vehicle body. When turning around a sharp curve, etc., the axle casing is allowed to rotate relative to the vehicle body, and the drive device By rotating the casing at a predetermined angle with respect to the vehicle body, the rear wheels are rotated along with the axle in the left and right directions to assist in changing direction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the body of a large vehicle, and FIG. 2 is a rear front view. In the figure, 1 is the chassis (vehicle body), 2 is the rear wheel,
3 is an axle casing, 4 is a rotating seat, 5 is a rotating seat, 6 is a drive device, 7 is a locking device, and 8 is a positioning device.

As shown in FIG. 3, the rotary seat 4 is constructed by attaching both ends of the axle casing 3 to a table-shaped sheet metal 9 with washers 10,
10 and fixed via bolts 11, 11. sheet metal 9
A circular hole 12 is bored in the center of the circular hole 12, and a differential gear portion 13 is fitted into the circular hole 12, and an annular rotation shaft portion 14 is formed at the inner peripheral edge of the circular hole 12. . Reference numeral 15 denotes an annular clasp, which is connected and fixed onto the rotation shaft portion 14 after being fitted into the circular hole 16 of the rotation seat 5. Rotating shaft part 1
4 and the annular clasp 15 are connected through holes 14 drilled in each.
a and 15a through the bolt 15b and the circular hole 1 of the rotating seat 4.
They are passed through a hole 13a drilled on the periphery of 2 and fixed by tightening with a nut, or connected to each other by welding.

As shown in FIG. 3, the rotating seat 5 is made of a table-shaped sheet metal 17 with a circular hole 16 in the center into which the rotating shaft 14 of the rotating seat 4 is fitted. Bolts 19 are attached to springs 18, 18, which have the same shape as the sheet metal 9 and are rotatably supported at both ends on the chassis 1.
, 19.

[00011] As shown in FIG. 1, the drive device 6 is arranged such that when the axle casing 3 is orthogonal to the chassis 1, as shown in FIG. It consists of hydraulic cylinders 21, 21 in which the ends of rams 20, 20 are rotatably mounted, and the ends of the hydraulic cylinders 21, 21 are rotatably connected to the rotating seat 5, respectively. hydraulic cylinder 2
1 and 21 are connected to a hydraulic control device via hydraulic piping (not shown), and for example, the left and right hydraulic cylinders 21 are
, 21 can be expanded and contracted independently.

As shown in FIG. 3, the locking device 7 has holes 22 and 23 formed in the rotary seat 4 and the rotary catch 5 that match each other, and lock pins that can be engaged with the holes 22 and 23, respectively. 24, 24 are made perpendicular to and detachable from the rotating seat 4 and the rotating seat 5, and as shown in FIG.
A hydraulic cylinder 25 is fixed perpendicularly to the back side of the cylinder facing the hole 22, and a lock pin 24 that extends and contracts from the upper end thereof.
is formed at the end of the ram. hydraulic cylinder 25
are connected to a hydraulic control device via hydraulic piping (not shown), and for example, the left and right hydraulic cylinders 25, 25 are installed in the driver's cab.
can be operated at the same time.

[00013] The rotation seat 5 is attached to the spring 1 with a bolt 19.
The positioning device 8 is for improving the rigidity of the rotating seat 5 by detachably fixing the rotating seat 5 to an arm 39 fixed to the chassis 1. Similar to the locking devices 7, 7, the rotating seats 5 and 4 are locked at the apex positions of the substantially triangular devices 7, 7. That is, as shown in FIG. 5, a hole 29 that matches the hole 28 of the rotary seat 5 is bored in the rotary seat 5, a cylindrical body 30 is placed in the hole 29, and a position pin 26 is attached to the cylindrical body 30. The lever 33 is rotatably connected to the shaft 32 at the upper end of the position pin 26, and the approximately central portion of the lever 33 is connected to the fulcrum 35.
A ram 37 of a hydraulic cylinder 38 is rotatably connected to the other end of the lever 33 by a shaft 36. The fulcrum stand 35 is suspended and fixed to an arm 39 fixed to the chassis 1. hydraulic cylinder 3
8 is fixedly supported by an arm 39 and can be expanded and contracted from inside the driver's cab via a hydraulic control device (not shown). Note that a stopper 31 is attached to the position pin 26.
is provided.

It is preferable to provide outriggers on both left and right sides of the chassis 1 in the vicinity of the axle casing 3 with extendable legs for lifting the vehicle body by touching the road surface under hydraulic control.

The operation of the above embodiment will be explained. During normal driving, as shown in FIG. 1, the lock pin 24 and the position pin 26 pass through the rotating seat 4 and rotating seat 5, respectively, and are connected to each other, so that the axle casing 3 is perpendicular to the chassis 1. Hold it in place so that it does not interfere with driving.

[00016] When the road has a narrow, sharp curve, etc., when the turn cannot be completed simply by turning the steering device, the system stops temporarily, and the hydraulic cylinder 25 is actuated by hydraulic control to lock the lock pin 24, 24 from the rotary seat 4, and also drive the hydraulic cylinder 38 to push down the shaft 36 of the lever 33, causing the shaft 32 to rise and pull out the position pin 26 from the hole 28 of the rotary seat 4. It becomes possible to rotate with respect to the seat 5.

Next, the hydraulic cylinders 21, 21 are started by hydraulic control, and the rams 20, 20 expand and contract to rotate the rotary seat 4 about the rotation shaft 14 in either the left or right direction as required. For example, as shown in phantom lines in FIG. 1, when rotating the rear wheels 2, 2 to the left, the ram 20 of the left hydraulic cylinder 21 is extended and the ram 20 of the right hydraulic cylinder 21 is pulled. It is.

Therefore, if the rotary seat 4 rotates at a required angle around the rotary shaft portion 14 at the lower part of the rotary seat 5, the vehicle turns by rotating the steering device while moving slowly. When the sharp curve is completed, the hydraulic cylinders 21, 21 are operated in the opposite manner to the above operation to align the rotary seat 4 with the rotary catch 5, and the lock pins 24, 24 and position pin 26 are placed in the rotary seat 4, respectively. The axle casing 3 is passed through and connected to the rotating seat 5, and the axle casing 3 is locked in a state perpendicular to the chassis 1 for normal driving.

Note that a spacer or a bearing may be interposed between the rotating seat 4 and the rotating seat 5 to ensure smooth rotation. In addition, the rotatable angle of the rotary seat 4 cannot be made very large (for example, about 12 degrees) due to structural constraints in large vehicles, so if the rotation seat 4 cannot be turned at this maximum rotation angle, the above-mentioned The bend can be made by repeating the same operation. Furthermore, when the vehicle is equipped with outriggers, the telescopic legs are brought into contact with the road surface and the rear wheels 2, 2 are lifted off the ground.
It is effective to rotate the rotary seat 4 as desired in this state, but it can also be operated in a stationary manner as described above even without an outrigger.

00020

[Effects of the Invention] According to the present invention as described above, the axle casing is rotatably connected to the vehicle body and fixedly perpendicular to the vehicle body, and the axle casing is fixed perpendicularly to the vehicle body. When driving normally, or when normal steering such as turning around is not enough to complete a turn, the axle casing can be turned independently at a desired angle relative to the vehicle body. By making it possible to enter even when roads are difficult to enter, the area that large vehicles can enter on our country's roads, which are narrow and have many sharp curves, has been expanded, improving transportation efficiency and making it necessary to transport materials, etc. The work efficiency can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a chassis of a large vehicle according to an embodiment of the present invention.

FIG. 2 is a rear front view of the chassis.

FIG. 3 is an exploded perspective view of essential parts.

FIG. 4 is a longitudinal side view showing the locking device.

FIG. 5 is a longitudinal side view showing the positioning device.

[Explanation of symbols]

1...Chassis 2...Rear wheel 3...Axle casing 4... Rotating seat 5...Rotating catch 6...Drive device 7... Locking device 8...Positioning device 12, 16... circular hole 14...Rotation shaft part 15...Annular clasp 21, 25, 38...hydraulic cylinder 24...Lock pin 26...Position pin

Claims (6)

[Claims] 1. Direction of a vehicle, characterized in that the axle casing is rotatably connected to the vehicle body and fixedly connected in a state where the two are perpendicular to each other, and has a drive device that rotates the axle casing. Conversion aid. Claim 2: A rotating seat is fixed to the upper center of the axle casing, a rotating seat that overlaps the rotating seat is fixed to the vehicle body, and a rotating seat is provided between the rotating seat and the rotating seat to lock and unlock both. What is claimed is: 1. A direction change assisting device for a vehicle, comprising: a locking device for rotating a rotating seat; and a driving device for rotating a rotating seat at a desired angle with respect to a rotating receiver. [Claim 3] A rotating seat is fixed to the upper center of the axle casing, a rotating seat that overlaps the rotating seat is fixed to the vehicle body, and the rotating seat and the rotating seat are fixed in a state where the axle casing and the vehicle body are perpendicular to each other. 1. A direction change assist device for a vehicle, comprising a locking device having a penetrating lock pin and a drive device for rotating a rotating seat at a desired angle with respect to a rotating receiver. 4. A locking device that provides a rotating seat in the upper center of the axle casing, fixes a rotating seat that overlaps the rotating seat to the vehicle body, and locks both the rotating seat and the rotating seat. 1. A direction change assisting device for a vehicle, comprising: a drive device having an extendable and retractable hydraulic cylinder disposed between a rotating seat and a rotating receiver. 5. A rotating seat is provided at the upper center of the axle casing, a rotating seat that overlaps the rotating seat is fixed to the vehicle body, and a rotating seat that penetrates the rotating seat and the rotating seat when the axle casing and the vehicle body are perpendicular to each other. 1. A direction change assisting device for a vehicle, comprising: a locking device having a locking pin; and a drive device having an extendable and retractable hydraulic cylinder disposed between a rotating seat and a rotating receiving seat. 6. A rotating seat is provided at the upper center of the axle casing, a rotating seat that overlaps the rotating seat is fixed to the vehicle body, and a rotating seat that penetrates the rotating seat and the rotating seat when the axle casing and the vehicle body are perpendicular to each other. A drive device comprising a locking device having a locking pin for engaging the rotating seat and a positioning device having a positioning pin for engaging the rotating seat with the vehicle body, and having an extendable and retractable hydraulic cylinder disposed between the rotating seat and the rotating seat. A direction change assisting device for a vehicle, comprising: