JPH0478618A - Dolly - Google Patents

Abstract

PURPOSE:To secure stability and safety of travelling regardless of existence of loaded articles, longitudinal inclination on the running ground and irregularity by each center of gravity of an engine, a transmission for travelling and a load-carrying platform within a grounding range of a travel device from a machine body side view or a spot nearest it. CONSTITUTION:A drive part 1 and a load-carrying platform 2 are arranged in parallel in the longitudinal direction of a machine body in the travel machine with a pair of right and left unleveled ground travel devices 4, 4. Additionally, an engine E is arranged between the right and left drive devices 4, 4 by placing it nearer to the side of the load-carrying platform 2 than in input shaft 4a of each of the unleveled ground drive devices 4, 4. Furthermore, a transmission M for travelling to transmit output of the engine E to each of the unleveled ground drive devices 4, 4 is installed in parallel with the engine E in the longitudinal direction of the machine body in a position inclined to the side of the engine E more on the upper edge from the machine body side view. Then, a recessed part 2a where the upper part of the engine E enters is provided on the side edge part of the drive part of the load-carrying platform 2.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a transport vehicle having an all-terrain traveling device.

[Conventional technology]

Conventionally, in the above transport vehicle, the engine and the driving section are arranged in parallel in the lateral direction of the vehicle, and the engine, the driving section, and the loading platform are arranged in parallel in the longitudinal direction of the vehicle.

[Problem to be solved by the invention]

Conventionally, the engine has been located protruding forward or rearward of the aircraft compared to the traveling gear when viewed from the side of the aircraft, and due to this, the traveling transmission has also been located in the same way, especially in the case of small transport vehicles, where the engine is located near the loading platform or the empty space. The weight balance between the front and rear was poor, and the stability of the aircraft tended to be particularly poor when the aircraft was tilted forward or backward.

An object of the present invention is to provide a transport vehicle that can maintain a good front and rear weight balance both when the vehicle is loaded and when the vehicle is unloaded, while preventing increases in overall length and height.

[Means to solve the problem]

In order to achieve the purpose of the transport vehicle according to the present invention, a running machine body having a pair of right and left all-terrain running devices is provided with a driving section and a loading platform in parallel in the longitudinal direction of the machine body, and an engine is installed in the vehicle body. A traveling transmission that transmits the output of the engine to the all-terrain traveling device is disposed closer to the loading platform side than the input shaft of the all-terrain traveling device and between the left and right traveling devices, and is disposed closer to the upper end as viewed from the side of the aircraft. The cargo platform is arranged side by side with the engine in the longitudinal direction of the aircraft in an inclined position toward the engine, and a recess into which the upper part of the engine enters is provided at the end of the loading platform on the driving section side. Its action and effects are as follows.

[For production]

According to the arrangement configuration of the engine, the traveling transmission, and the cargo platform, the centers of gravity of the engine, the traveling mission, and the cargo platform are located within the ground contact range of the traveling device when viewed from the side of the aircraft, or as close as possible to the ground contact range of the traveling device, so that The center of gravity can be positioned as close to the center of the ground contact range as possible whether or not the load weight is applied. Moreover, when viewed from the side of the aircraft,
The lower part of the engine overlaps with the traveling device, and the upper part of the engine overlaps with the loading platform, so that the loading platform is located as low as possible and as close to the moving parts as possible.

〔Effect of the invention〕

As a result, it has become possible to drive stably and safely, with less pitching, regardless of whether there is a load on board or not, regardless of whether the terrain is sloped forward or backward or uneven.

In addition, the overall height and overall length were minimized, making it compact and easy to maneuver and store.

〔Example〕

Next, examples will be shown.

As shown in Figure 1, a loading platform (2) is placed on the front end side of a crawler-type traveling body having a driving part (1) on the rear end side, so as to be parallel to the driving part (1) in the longitudinal direction of the machine. The dump cylinder (3) is attached so as to be able to swing up and down around the axis (X) on the front end side, thereby constructing a transport vehicle capable of dumping a cargo platform.

To enable the aircraft to travel, as shown in Figures 1 and 2, the center of gravity of the engine (E) should be located within the ground contact range of the left and right travel devices (4) and (4) when viewed from the side of the aircraft. , and the left/right traveling device (4) so that the lower part of the engine (E) overlaps with the traveling device (4).

(4) The engine (E) is placed closer to the loading platform side than the input shaft (4a) and placed between the left and right traveling device (4), (4),
Left and right running device (4), track frame (4) of (4)
b).

(4b) is attached to the engine mounting frame (5), and the traveling transmission (M) located at the rear of the engine (E) is placed in an inclined position with the upper end closer to the engine (E). ) and the left/right traveling device (4) in parallel in the longitudinal direction of the aircraft.

(4), and transmits the rotational output of the engine (E) to the left and right traveling device (4) based on the transmission structure shown in FIG.
(4). That is, the rotational output of the engine (E) is transferred to the transmission belt (6) and the input shaft (
7) to the hydraulic continuously variable transmission part (8), and the rotational output of this transmission part (8) can be changed to two high and low speeds through the input shaft (9). The rotational force of the forward output gear (11) of the transmission transmission section (10) is inputted to the transmission section (10) and transmitted to one of the traveling devices (4) through one of the pair of steering clutch members (12a) and (12b). ) and to the input shaft (4a) of the other traveling device (4) via the other steering clutch member (12b), respectively. A pair of rearward force gears (
13a).

(13b), the steering clutch member (12a)
) to the input shaft (4a) of one traveling device (4),
Further, the rotational force of the other rearward output gear (13b) is transmitted to the input shaft (4a) of the other traveling device (4) via the steering clutch member (12b).

A reversing clutch (14) and a brake (15) are attached to the gear type transmission transmission part (10) so as to act on the rearward output gears (13a) and (13b). Connect the reverse clutch member (14) to the reverse cylinder (C5)
The driving brake (15) is operated by the brake cylinder (C2), and the pair of steering latch members (1
2a), (12b) as a pair of traveling cylinders (C3),
(C,), and these cylinders (C1) to C3) are operated by a single steering lever (16) based on the operating structure shown in FIG. The apparatuses (4) and (4) are configured to perform different stopping, braking, and reversing operations to control the aircraft direction.

That is, a pair of steering cylinders (C3), one control valve (■) for (C3), and a mode switching valve for connecting and switching the reversing cylinder (C1) and brake cylinder (C2) to the operating oil path (17). (18), a variable relief valve that changes the relief pressure of the operating oil passage (17) to switch the reversing cylinder (C1) and the brake cylinder (C2) (
19) is linked to the steering lever (16) by a linkage mechanism (20) consisting of an operating wire or the like.

When the steering lever (16) is swung in the lateral direction of the aircraft and moved to the straight forward position (S), the control valve (V) or neutral position (N) is set, and both steering cylinders (C3) and (
C3) becomes the forward side, and the reverse cylinder (C1) becomes the clutch disengaged side, and the brake cylinder (C2) becomes the brake disengaged side. Move the steering lever (16) to the first left turning position (L
l) or the first right turning position (R1), the control valve (V) becomes the turning position (A1) or (A2) and one steering cylinder (C3) is operated on the forward side to turn the other. The cylinder (C3) is on the reverse side, and the variable relief valve (19) is under low pressure to the reverse cylinder (C1) and brake cylinder (C
2) Become the cutting side. When the steering lever (16) is operated to the second left turning position (R2) or the second right turning position (R2), the control valve (V) becomes the turning position (A1) or (A2) and is not operated in one direction. The steering cylinder (C3) becomes the forward drive side and the other steering cylinder (C3) becomes the reverse drive side, and the variable relief valve (
19) is at medium pressure, the mode switching valve (18) is in the brake position (B), the reverse rotation cylinder (C1) is on the off side, and the brake cylinder (C2) is on the on side. Steering lever (16
) to the third left turning position (R3) or the third right turning position (R
When operated in step 3), the control valve (V) becomes the turning position (A1) or (A2), and one steering cylinder (C3) becomes the forward drive side and the other steering cylinder (C3) becomes the reverse drive side.
Mode switching with variable relief valve (19) or high pressure (18)
At the reverse rotation position (R), the brake cylinder (C2) is on the cut side and the reverse rotation cylinder (C1) is on the cut side.

A recess (2) is provided at the rear end of the loading platform (2) into which the upper part of the engine (E) enters when the loading platform (2) is in the descending position.
a) is provided. In other words, regardless of the upper part of the engine protruding upward from the traveling body, the engine (E) and the loading platform (2) should be positioned so that the loading platform (2) is located as low as possible and close to the driver section (1). ) is intended to avoid interference with the recess (2a).

[Another example]

As shown in FIG. 5, the driving unit (1) may be arranged at the front end of the traveling machine and the loading platform (2) may be arranged at the rear end of the traveling machine. Therefore, the end of the loading platform (2) provided with the recess (2a) is referred to as the driver side end.

Instead of the crawler traveling device (4), a traveling device having three or more tires or wheels arranged in parallel in the longitudinal direction of the aircraft body may be used. Therefore, these are referred to as an all-terrain traveling device (4).

It should be noted that the present invention is not limited to the structure shown in the accompanying drawings by adding reference numerals in the claims for convenient comparison with the drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the transport vehicle according to the present invention, and FIG. 1 is a partially cutaway side view of the entire transport vehicle, FIG. 2 is a plan view of the entire transport vehicle, FIG. 3 is a hydraulic circuit diagram, and FIG. The figure is a schematic diagram of the traveling transmission, and FIG. 5 is a partially cutaway side view of another implementation of the transport vehicle. (1)...driver section, (2)...loading platform,
(2a)...Concavity, (4)...Rough terrain traveling device, (4a)...Input shaft, (E)...
...Engine, (M)...Transmission for driving.

Claims (1)

[Claims] A traveling body having a pair of left and right rough terrain traveling devices (4), (4) is provided with a driving section (1) and a loading platform (2) arranged in parallel in the longitudinal direction of the body, and an engine (E) is installed in the vehicle body. It is arranged between the left and right traveling devices (4), (4) closer to the loading platform side than the input shaft (4a) of the ground leveling traveling devices (4), (4), and the output of the engine (E) is connected to the The traveling mission (M) that transmits to the rough terrain traveling devices (4), (4) is placed side by side with the engine (E) in the longitudinal direction of the aircraft in an inclined position that approaches the engine (E) toward the upper end when viewed from the side of the aircraft. death,
The engine (E
) is equipped with a recess (2a) into which the upper part of the transport vehicle fits.