JPH0246483Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wheel support device for a compaction vehicle.

[Conventional technology]

Wheels of compaction vehicles, such as steering wheels of tire rollers, are as shown in FIGS. 1 and 2.
Fork 2 rotatably installed vertically at the front of the vehicle body 1
The tire 8 is attached to the vehicle body 1 by swingably connecting both ends of the frame 3 to the front and rear center of the frame 3 which is attached to an axle (not shown) on which a tire 8 is mounted, and an arm protruding laterally from the upper center of the fork 2. 4 is connected to an operating cylinder 5 attached to the vehicle body 1. The actuating cylinder 5 is actuated by receiving hydraulic oil from a pump 7 by operating the steering handle 6, thereby rotating the fork 2 and turning the tires 8 to the right or left.

In the figure, 9 is a relief valve and 10 is an oil tank.

As shown in FIGS. 3 to 5, the fork 2 is formed by bending an elongated flat plate into an arc shape, and
A support shaft 11 is attached to the center top of the fork, and two large and small bearings 12 fitted into the support shaft 11 are used to rotatably attach the fork 2 to the vehicle body 1, and both ends of the fork 2 are attached to frames formed at the center of the front and back of the frame 3. A pin 14 is swingably attached to a bearing portion 13 having a shape. The frame 3 is attached to an axle 15 via bearings 16 mounted at the center of both ends thereof, and tires 8 are attached to both ends of each wheel 15.

When the wheel is a steel wheel roller, for example, as shown in FIGS. 6 to 8, one wheel 17 is attached to two steel wheels 18 via bearings 19, and both ends of the wheel 17 are attached to a frame surrounding the two steel wheels 18. 20, and both ends of the fork 2 are swingably attached to bearing portions 13 formed at the center of the front and back of the frame 20 using pins 14.

[The problem that the idea attempts to solve]

The fork 2, which is attached to the wheel via the axle and frame as described above, is formed by bending a long and thin flat plate into an arc shape, and therefore requires a certain width for strength reasons. On the other hand, the gap between the wheels 8 and 18 is set to be narrow in order to minimize the amount of undesired footing on the road surface. Therefore, the width B of fork 2
had to be made wider than the gap C between the wheels 8 and 18. Therefore, when taking out the wheels 8, 18 from the vehicle body 1, the vehicle body 1 had to be lifted to a height where the lower end of the fork 2 exceeded the upper limit of the wheels 8, 18, which had the disadvantage of requiring extensive work using a crane or the like. In particular, in vibrating rollers, the front wheel may be a steel wheel and the rear wheel may be a tire or a steel wheel, and the problem is that the tire and the steel wheel are often replaced, which requires extensive work each time.
Further, since the fork 2 is a long and thin flat plate bent into an arc shape, it is susceptible to impact and may be bent due to, for example, a head-on collision or a collision between a falling vehicle body and a road surface. For this reason, in addition to widening the plate width, ribs were added, which resulted in a complicated structure and increased production costs. In addition, in the past, the fork and frame protruded in front of the wheel, which obstructed rolling and made it impossible to roll close to the wall. With steel wheels, the frame also protruded from the side, making it difficult to close the width even when rolling on the side. It becomes difficult. There were also accidents where forks and frames came into contact with walls, etc.

Therefore, in the present invention, it is an object of the present invention to provide a wheel support device for a compaction vehicle that can strengthen the fork with a simple structure, allow for easy and quick wheel replacement, and allow compaction work up to almost the wall. The purpose is

[Means for solving problems]

In order to achieve this purpose, in the wheel support device for a compaction vehicle of the present invention, a beam is placed between the central wheels of an axle on which at least two wheels are rotatably mounted, and is perpendicular to the axle, and protrudes from the front and rear of the wheels. The lower ends of a fork rotatably supported on the vehicle body are swingably attached to both ends of this beam, and this fork has a maximum thickness smaller than the gap between the wheels and a wider width in the vertical direction. A special feature is that a part of the fork is interposed between the wheels.

[Effect]

Since the beam 27 and the fork 21 do not protrude from the front and rear of the wheels 8 and 18 and from the outer side of the wheels,
Compaction work can be performed up to the front and side walls. Since the fork 21 rotatably supported on the vehicle body 1 has a wide width in the vertical direction, the impact resistance of the fork 21 in the longitudinal direction and the vertical direction of the vehicle body is improved. Also, Folk 21
Since the maximum thickness of the fork 21 is made smaller than the gap between the wheels 8 and 18, the connection between the fork 21 and the beam 27 is released, and both lower ends of the fork 21 are connected to the beam 27.
If you lift the car body 1 until it passes the upper end, that is,
If you lift the car body a little, you can move the wheels 8 and 18 to the axle 26.
The whole can be taken out from the vehicle body 1. Further, the wheels 8, 18 taken out can be easily and quickly attached to the vehicle body 1 in the reverse order.

〔Example〕

Embodiments of the present invention will be described based on the drawings. In Figures 9 and 10, the fork 21 is an inverted T.
Fork body 2 made of a single plate shaped like a shape or an inverted Y shape
A downward connecting part 23 is provided protruding from both ends of the lower part of the bearing 2, and an upwardly directed support shaft 11 is provided protruding from the center top part of the bearing 2, and two large and small bearings 12 are fitted onto the support shaft 11.
The fork body 22 is rotatably attached to the vehicle body 1 via an arm 4 projecting laterally from the top of the fork body 22, and this arm 4 is connected to an operating cylinder 5 attached to the vehicle body 1. Fork body 22
The plate thickness of the fork body 22 and the plate width of the connecting portion 23 are set to be large enough to withstand right and left turns of the tires 8 by the steering handle 6 within a range narrower than the gap C between the tires 8, and the plate width of the fork body 22 in the vertical direction and the vehicle body. By making the plate width in the front and rear directions sufficiently wide, the strength in both directions is significantly improved. Axle 26
As shown in FIG. 9, four tires 8 are mounted at appropriate intervals via bearings 31, and a beam 27 is orthogonally connected between the tires 8 at the center of the axle 26 via bearings 33. And this beam 27
Both ends of the frame form a bearing part 28, and the connecting part 23 of the fork 21 is loosely fitted into the through hole 29 of this bearing part, and this connecting part is swingably attached to the bearing part 28 with a pin 30. .

In the wheel shown in FIG. 11 in which the wheels are iron wheels, a beam 27 having the same structure as the above-mentioned beam 27 is orthogonally connected between the iron wheels 18 of an axle 26 with two iron wheels 18 attached through bearings 32 through bearings 33. connect,
Frame-shaped bearing portions 28 at both ends of this beam 27
Fork 21 with the same configuration as the fork 21 above
A connecting portion 23 is loosely fitted, and this connecting portion is swingably attached to a bearing portion 28 with a pin 30.

Therefore, the fork 21 and the beam 2
The length of the wheel 7 in the longitudinal direction of the vehicle body is approximately equal to or shorter than the outer diameter of the wheels 8 and 18 so as not to protrude from the front and rear of the wheels.

Since this embodiment has the above-described configuration, there is nothing protruding from the front and rear of the wheels 8, 18 and the outer sides of the wheels 8, 18, so it is possible to perform compaction work up to the front and side walls, and
Collision accidents between the fork 21 and the beam 27 and walls etc. are also eliminated. Further, since a part of the fork body 22 is disposed between the wheels 8 and 18, the plate width is wide in the longitudinal direction and vertical direction of the vehicle body, that is, in the direction of a head-on collision and the direction of a collision between the falling vehicle body and the road surface. Become,
It can be made into a structure that is resistant to impact. In addition, Folk 2
1, the thickness of the fork body 22 and the plate width of the connecting part 23 are both smaller than the gap between the wheels 8 and 18. Therefore, when replacing the wheels, for example, the vehicle body 1 must be supported with jacks (not shown) and the fork can be replaced. 21, the pin 30 is removed from the connecting portion 23, and this connecting portion 2 is removed.
By lifting the vehicle body 1 with a jack until the wheel 3 passes the bearing portion 28 of the beam 27, the wheels 8 and 18 can be taken out from the vehicle body 1 along with the axle 26. That is,
Just by lifting the car body a little, you can take out the wheels along with the axle. In addition, the wheel taken out is supplied to a predetermined position on the vehicle body 1 along with the beam 27, and the vehicle body 1 is fixed with a jack.
is lowered, the connecting portion 23 of the fork 21 and the bearing portion 28 of the beam 27 are connected with the pin 30, and the jack is removed, completing the attachment of the wheel to the vehicle body 1.

[Effect of idea]

Since the present invention is configured as described above, it produces the following effects.

Since the forks and beams do not protrude from the front, rear, or sides of the wheel, compaction work can be carried out almost to the wall.

Since the maximum thickness of the fork is smaller than the gap between the wheels, when the fork is uncoupled from the beam and the fork is removed from the beam, i.e.
By lifting the car body a little, you can remove the wheels along with the axle from the car body. Therefore, wheels can be replaced easily and quickly.

The width of the fork in the vertical direction is increased to make it more rigid, which helps prevent deformation of the fork.

The fork can be constructed by fixing connecting plates to both ends of the lower part of a single plate, so it is easy to manufacture and the manufacturing cost can be reduced.

[Brief explanation of drawings]

Fig. 1 is a side view of a tire roller, Fig. 2 is an explanatory diagram of the steering mechanism of a steering wheel, Fig. 3 is a front view of a conventional steering tire, Fig. 4 is a side view of the same, and Fig. 5 is a diagram illustrating a steering mechanism of a steering wheel. 3 is a partially cutaway sectional view taken along the line A-A in FIG. 3, FIG. 6 is a front view of a conventional steering steel wheel, FIG. 7 is a side view of the same, and FIG. 8 is a section taken along the line B-B in FIG. 6. FIG. 9 is a partially cutaway sectional view showing an embodiment of the present invention, and FIG.
0 is a side view between the wheels at the center of the axle in FIG. 9, and FIG. 11 is a partially sectional front view showing another embodiment of the present invention. 1...Vehicle body, 8...Tire, 15, 26...Axle, 18...Iron wheel, 21...Fork, 27...
beam.

Claims (1)

[Scope of utility model registration request] At least two wheels 8, 18 are rotatably mounted on the axles 15, 26, and the beam 27 is placed between the central wheels 8, 18 so that it is perpendicular to the axles 15, 26 and does not protrude from the front and rear of the wheels 8, 18. The lower ends of the fork 21 rotatably supported on the vehicle body 1 are swingably attached to both ends of the beam 27.
This fork 21 has a maximum thickness smaller than the gap between the wheels 8 and 18, and is wide in the vertical direction so that a part of the fork 21 is interposed between the wheels 8 and 18. Wheel support device for pressure vehicles.