JP2595349Y2 - Traveling device for asphalt pavement vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device for an asphalt-paved vehicle such as an asphalt finisher, a remixer, and a repeater.

[0002]

2. Description of the Related Art
Some types of asphalt pavement vehicles have a spreading device that spreads and spreads an asphalt mixture at the rear of the traveling machine, such as an asphalt finisher. Via a leveling arm whose base end is supported by the fuselage frame of
It is configured to be pulled by the traveling body.

[0003] By the way, in such a vehicle, a front wheel for constituting a traveling device is provided.
The wheel is composed of a pair of left and right front front wheels and a rear front wheel.
There are many things, and in such things, running
The front and rear of a pair of left and right support frames on the fuselage frame of the aircraft
The center is pivotally supported up and down so that it can swing up and down.
In addition, the front and rear front wheels are supported,
The support frame swings up and down
It is advisable to survive well. Place
However, the front wheels must be equipped with a steering function,
Are the front left and right front wheels and the rear front wheel
Connect with a tie rod, and in front of either left or right
The wheels are connected so that they are steered in conjunction with the steering operation.
The front wheel on the other side is configured to steer in a similar manner
Was. However, when this is done, the irregular road surface
Due to the unevenness, the left and right running frame moves reciprocally up and down
And the front wheels on the other side are pulled by tie rods
If the front wheels on multiple sides are steered and straightness is impaired
The problem that the present invention is trying to solve is
there were.

[0004]

This invention SUMMARY OF THE INVENTION, there was conceived for the purpose of providing a traveling device of the asphalt pavement vehicle capable to wipe these drawbacks in view of the such circumstances described above, the travel In the asphalt pavement vehicle that pulls a spreading device that spreads and spreads asphalt mixture, behind the traveling body with front and rear wheels as wheels,
The front wheels, left and right pair of first front wheel located on the front side (6)
And a pair of left and right second front wheels (7) located on the rear side. A substantially central portion in the front-rear direction of the pair of left and right traveling frames (10) facing the front-rear direction is attached to the body frame (1a) of the traveling body. vertically swingably to axially supported, the first to the front and rear end portions of the running frame, when supporting a second wheel, respectively,
The first and second front wheels are supported on the traveling frame by first and second front wheel brackets (11, 1) on which the front wheels are respectively supported.
3) is supported by the traveling frame (10) so as to be swingable about the longitudinal axis, and the swing arms projecting from the first and second front wheel brackets project from the longitudinal axis.
The distance is shorter for the first front wheel on the front side than for the second front wheel on the rear side.
And the steering hydraulic cylinder (1
The first steering link (1) that moves left and right based on the operation of 7)
6) and the same front-rear direction as the traveling frame,
A pair of left and right that move back and forth in conjunction with the left and right movement of the steering link
And a second steering link (18) is provided.
The left and right front wheel brackets on the same side.
It is characterized by being connected to each of the distal ends .

[0005] The present invention relates to a traveling machine
A hopper (2) is opened at the front of the body for charging the mixture.
The first and second front wheels are supported so that they can be closed.
Open and close the hopper on the swing shaft of the traveling frame held
A hydraulic cylinder (15) is provided .

According to the present invention, a road surface
Has irregular irregularities, and the running frame is upside down
Even if you move, you will not lose the straightness
It is.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling body of an asphalt finisher. The traveling body 1 includes a hopper 2 for receiving asphalt mixture, a bar feeder (not shown) for sending the asphalt mixture received by the hopper 2 backward, and a bar feeder. And various other devices such as a screw spreader 3 for uniformly spreading the asphalt mixture sent from the vehicle on the pavement surface. Further, behind the traveling body 1, the asphalt mixture spread on the pavement surface A screeding device (corresponding to the spreading device of the present invention) 4 for compacting the material and spreading the pavement surface smoothly is a leveling arm 5.
And the like, as in the past.

The traveling wheels of the traveling body 1 are a pair of left and right first front wheels 6, a pair of left and right second front wheels 7 disposed behind the first front wheel 6, and a pair of left and right rear wheels 8. It is composed of six convenient wheels, of which the first and second front wheels 6, 7
Are set as steering wheels, and all six wheels 6, 7, and 8 are set as driving wheels. Here, the rear wheel 8 is rotatably supported on the rear portion of the body frame 1a of the traveling body 1 and includes various power transmission mechanisms such as a transmission chain, a transmission gear, a transmission shaft, and a differential gear (all not shown). In the intervening state, it is interlockingly connected to a rear wheel drive hydraulic motor (neither is shown) driven based on hydraulic pressure supplied from a hydraulic pump powered by an engine mounted on the traveling body 1 as a power source, The rear wheel 8 is driven and rotated based on the drive of the hydraulic motor.

On the other hand, reference numeral 9 denotes a left-right supporting shaft which is supported through the front of the body frame 1a, and is provided at the left and right ends of the supporting shaft 9 at substantially the center of the front-rear running frame 10 in the front-rear direction. The parts are each pivotally supported vertically.
At the front end of the traveling frame 10, a first front wheel bracket 11 for rotatably supporting the first front wheel 6 is rotatably supported around a first longitudinal axis 12.
At the rear end, a second front wheel bracket 13 on which the second front wheel 7 is rotatably supported is rotatably supported about a second longitudinal axis 14. Also, in the figure, reference numeral 15 opens and closes the hopper 2.
A base end of the hydraulic cylinder 15 is attached to a portion of a support shaft 9 of the traveling frame 10. When the traveling frame 10 swings up and down about the support shaft 9, the hydraulic cylinder 15 are not affected.

At the rear of the second front wheel bracket 13,
An operating arm 13a projecting obliquely rearward is protruded, but the operating arms 13 of the left and right second front wheel brackets 13 are provided.
The leading end of a is swingably connected to the left and right ends of the first steering link 16 which faces in the left-right direction. The first steering link 16 is connected to a piston rod 17a of a steering hydraulic cylinder 17 via a bracket 16a. Although it is configured to move in the left-right direction, in the embodiment, as shown in FIG. 2, when the steering cylinder 17 is extended, the first steering link 1 is moved.
6 is set to move to the left, and when reduced, the first steering link 16 is set to move to the right. Then, the left and right second front wheel brackets 13 are configured to swing left and right integrally with the vertical axis 14 as a supporting axis as the first steering link 16 moves left and right.

Further, the second front wheel bracket 13 is provided with a second swinging arm 13b projecting obliquely forward so as to branch off from the operating arm 13a. The bracket 11 is provided with a first swing arm 11a that projects in a curved shape toward the rear. The distal ends of the first and second swing arms 11a and 13b are respectively swingably connected to the front and rear ends of a second steering link 18 pointing in the front and rear direction, whereby the first steering is performed. When the second front wheel bracket 13 swings left and right with the second vertical axis 14 as a support axis in association with the left and right movement of the link 16, the first front wheel bracket 11 also uses the first vertical axis 12 as a support axis in conjunction with this. It is set to swing left and right in the same direction as the second front wheel bracket 13. Here, the distance L1 from the axis position of the first vertical axis 12 to the connection position of the second steering link 18 of the first rocking arm 11a is calculated from the axis position of the second vertical axis 14 to the second rocking arm 13b. L to the second steering link 18 connection position
When the first and second front wheel brackets 11 and 13 swing left and right in conjunction with each other as described above, the right and left swing angle of the first front wheel 6 ( The steering angle is larger than the left-right swing angle (steering angle) of the second front wheel 7.

Reference numeral 19 denotes a hydraulic motor for driving the first front wheel provided on the first front wheel bracket 11, and reference numeral 20 denotes a hydraulic motor for driving the second front wheel provided on the second front wheel bracket 13. , 20 are driven based on the supply of hydraulic oil from a hydraulic pump (not shown) powered by the engine.
The first and second front wheels 6 and 7 are driven and rotated based on the 0 drive.

On the other hand, the screed device 4 is pulled by the traveling body 1 via the leveling arm 5 as described above, and the base end of the leveling arm 5 is located substantially at the center of the body frame 1a in the left-right direction. It is pivotally supported by a pivot 21 movably supported up and down. Reference numeral 22 denotes a pivot hydraulic cylinder connected to the pivot 21. The pivot 21 moves up and down by expanding and contracting the pivot hydraulic cylinder 22, and the working angle is adjusted by moving the pivot 21 up and down. (The angle between the lower surface of the screed plate 23 and the pavement surface) can be changed. Further, a pavement thickness adjusting tool (thickness control tool) 24 is provided between the rear portion of the leveling arm 5 and the front portion of the screed device 4, and the working angle of the screed device 4 is changed to change the pavement thickness. And an ascending cylinder 25 is provided between the traveling body 1 and the screed device 4 to lift the screed device 4 upward from a work position in contact with the pavement surface. At this time, the screed device 4 is set so as not to contact the ground.

In the embodiment of the present invention constructed as described above, the asphalt mixture received by the hopper 2 is sent backward by the bar feeder, spread on the pavement surface by the screw spreader 3, and further spread by the screed device 4.
In this case, there is almost no vertical movement of the pivot 21 that supports the base end of the leveling arm 5 that pulls the screed device 4, and the pavement finish surface is smooth. be able to.

That is, the traveling wheels of the traveling body 1 are composed of six wheels, that is, first and second front wheels 6 and 7 and a rear wheel 8, of which the first and second front wheels 6 and 7 are substantially in the front-rear direction. The central portion is supported by the front and rear ends of the traveling frame 10 which is pivotally supported on the body frame 1a side up and down. Therefore, when the road surface on which the pavement work is performed has unevenness and the front wheels run on the uneven surface, the first and second front wheels 6 and 7 move up and down in opposite directions about the support shaft 9 to form the road surface. By absorbing the unevenness, the vertical movement of the pivot 21 located behind the front wheels 6, 7 can be made as small as possible. As a result, inadvertent vertical movement of the leveling arm 5 due to unevenness of the working road surface can be eliminated, the working angle of the screed device 4 can be kept constant, and smoothness with almost no unevenness appears. It can be a paved surface.

In addition, the first and second front wheel brackets 11 and 13 for bearing the first and second front wheels 6 and 7 are swingable about the first and second longitudinal axes 12 and 14 on the traveling frame 10, respectively. The first swing arm 11a supported and projected from the first bracket 11 and the second swing arm 1 projected from the second bracket 13
3b via the second steering link 18 is connected to the second steering link 18 of the first swing arm 11a from the axis of the first vertical axis 12.
Since the distance L1 to the connection position is set to be shorter than the distance L2 from the axis of the second vertical axis 14 to the connection position of the second steering link 18 of the second swing arm 13b, The steering angle of one front wheel 6 is larger than the steering angle of the second front wheel 7. For this reason, when the four wheels of the first and second front wheels 6 and 7 are used as steering wheels, the steering angle of the first front wheel 6 is increased by the amount arranged forward, and smooth steering without any support is performed. Direction operation can be performed.

Further, in this case, the first and second front wheels 6,
7. Since all the six rear wheels 8 are drive wheels, sufficient traction driving force can be exerted on the front wheel side receiving the weight of the hopper 2 filled with the asphalt mixture, and powerful and reliable traction traveling work can be performed. This makes it possible to effectively avoid sinking of the front wheels even on fragile road surfaces,
Work traveling can be performed. Besides, when steering
In the above, the first front wheel 6 on the front side is
The steering angle is larger than that of the second front wheel 7 on the
In this case, the left and right sides are the same.
Of the first and second front wheels 6, 7 correspond to the left and right sides.
Link 18 and the second steering link
18 interlocks with the left and right movement of the first steering link 16
Move to steer the first and second front wheels 6 , 7 on the same side
It will be. As a result, irregular road surface irregularities
And the left and right running frames 10 have reciprocally rocked up and down.
Then, the left and right second steering links 18 are
Swing while following the left and right running frames 10
And the steering state of the first and second front wheels 6, 7 on the corresponding side.
That is,
Reliable without being affected by the reciprocal vertical movement of the arm 10
It is possible to run smoothly and straightness is not impaired,
Do smooth pavement finishing work with almost no appearance
Can be.

The present invention is of course not limited to the first embodiment, and can be carried out also when the traveling body of the asphalt pavement vehicle is a crawler type. In this case, As in the second embodiment shown in FIG. 4, the drive wheels of the crawler traveling body 26 are
And a pair of left and right second front wheels 28 and a pair of left and right rear wheels 29. The first and second front wheels 27 and 28 may be supported on the front and rear ends of the running frame 30 so as to be swingable. Also in this case, similarly to the first embodiment, the first and second front wheels 27 and 28 move up and down in opposite directions to absorb the unevenness of the road surface, so that the smoothness is obtained. While it can be a paved surface,
It will be able to demonstrate reliable traction.

Further, as in a third embodiment shown in FIG.
The traveling body of the asphalt pavement vehicle is constituted by a pair of left and right crawler traveling bodies 31 on the front side and a pair of left and right rear wheels 32 on the rear side. The drive wheels 31 are composed of a pair of left and right first front wheels 33 and a pair of left and right second front wheels 34, and are further mounted on a gantry of the traveling body at a substantially central portion of the pair of left and right traveling frames 35 in the longitudinal direction. The first and second front wheels 33 and 34 are provided at both front and rear ends of the traveling frame 35.
May be supported, and in such a case, the same operation and effect as those of the first and second embodiments are obtained. Incidentally, in the second and third embodiments, the crawler type is used as the traveling body of the asphalt pavement vehicle. In this case, the steering mechanism is performed by the speed difference between the left and right crawlers.

[0020]

[Effects] In summary, since the present invention is constructed as described above, the work of leveling the pavement surface is performed by the leveling device pulled behind the traveling body. In this case, the front and rear front wheels are supported at both front and rear ends of a traveling frame having a substantially central portion in the front-rear direction so as to be swingable up and down. in no event was the first, the second front wheel
When moving up and down in opposite directions to absorb road surface irregularities,
When steering, the first front wheel on the front side
The steering angle is larger than the second front wheel on the
In this case, the left and right sides are the same.
The first and second front wheels are connected to the left and right
And the second steering link is connected to the first steering link.
Linked to the left and right movement of the link
The first and second front wheels are steered. As a result,
Left and right running frames are contrary to each other in response to irregular surface irregularities
The left and right second steering links are
Swinging while following the left and right running frames
To maintain the steering state of the corresponding first and second front wheels.
And this may impair straightness.
No effect due to the reciprocal vertical movement of the left and right steering frames
It is possible to drive reliably without
Almost no smooth paving work can be performed.

[Brief description of the drawings]

FIG. 1 is a side view of an asphalt finisher.

FIG. 2 is a plan view of a front wheel portion.

FIG. 3 is a rear view of a second front wheel portion.

FIG. 4 is a schematic diagram of a traveling body showing a second embodiment.

FIG. 5 is a schematic view of a traveling body showing a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 traveling body 4 screed device 6 first front wheel 7 second front wheel 8 rear wheel 10 traveling frame 11 first front wheel bracket 11a first swing arm 12 first longitudinal axis 13 second front wheel bracket 13b second swing arm 14 second Longitudinal axis 18 Second steering link 26 Crawler traveling body 27 First front wheel 28 Second front wheel 29 Rear wheel 30 Traveling frame 31 Crawler traveling body 32 Rear wheel 33 First front wheel 34 Second front wheel 35 Traveling frame

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B62D 61/00 B62D 61/10 B62D 55/02-55/04

Claims (2)

(57) [Scope of request for utility model registration] An asphalt-paved vehicle comprising a spreading device for spreading and spreading an asphalt mixture material behind a traveling body having front and rear wheels as running wheels.
And a rear pair of right and left first front wheel located on the front side (6)
A traveling machine comprising a pair of left and right second front wheels (7)
A pair of left and right running frames (10) facing in the front-rear direction are substantially vertically centered on a body frame (1a) of the body so as to be vertically swingable. Upon supporting two front wheels, respectively, first, support for the second front wheel of the running frame, first, the vertical axis the second front wheel bracket (11, 13) in the traveling frame (10) that the front wheels are journalled respectively The projecting distance from the longitudinal axis of the swinging arm projecting from the first and second front wheel brackets should be
So that the first front wheel on the side is shorter than the second front wheel on the rear side
And the operation of the steering hydraulic cylinder (17)
A first steering link (16) that moves left and right based on
Facing the same front-back direction as the row frame, the first steering link
A pair of left and right second steering that moves back and forth in conjunction with the left and right movement of
Link (18), and each of the second steering links is
At the protruding tips of the first and second front wheel brackets on the same side,
A traveling device for an asphalt pavement vehicle, which is connected to each other . 2. The vehicle according to claim 1, further comprising:
Is equipped with a hopper (2) for charging the mixture
Running with the first and second front wheels supported
Hydraulic pressure for opening and closing the hopper is provided on the swing shaft of the row frame.
A traveling device for an asphalt pavement vehicle, comprising a cylinder (15) .