JP4652628B2 - Crawler-type turning dump vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crawler-type turning dump vehicle in which a vessel is provided on a vehicle body having a crawler-type traveling device so that the vessel can tilt, and more particularly to a crawler-type turning dump vehicle having a structure suitable for downsizing and ensuring stability.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a crawler-type turning dump vehicle in which a vessel is tiltably provided on an upper turning body that is turnably mounted on a lower traveling body having a crawler-type traveling device has been used. One disclosed in Japanese Patent No. 158338 is known. According to the above publication, the upper revolving unit is pivotably mounted substantially at the upper center of the lower traveling unit having a pair of left and right crawler type traveling devices, and the driver seat and the left or right side of the front part of the upper revolving unit A driving unit provided with a control device and the like, an engine room provided with an engine on the other side, and a vessel at a rear part of the upper revolving structure are provided so as to be tiltable rearward.
[0003]
[Problems to be solved by the invention]
On the other hand, with the diversification of construction sites in recent years, it has become necessary to travel on narrow roads in urban areas and narrow work areas on construction sites, so further downsizing of crawler-type turning dump vehicles is desired. Yes.
However, there is a limit to downsizing the conventional structure and device arrangement as described in Japanese Utility Model Publication No. 56-158338. That is, conventionally, since the operation unit and the engine room are arranged in the width direction at the front part of the upper revolving structure, the width of the upper revolving structure is required at least for the operation unit and the engine room. It is difficult to reduce the vehicle width sufficiently by simply downsizing the vehicle. Moreover, along with the miniaturization of vehicles, the stability during travel and work is becoming more important, and it is necessary to satisfy both.
[0004]
The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a crawler-type turning dump vehicle that enables both downsizing and ensuring stability.
[0005]
[Means, actions and effects for solving the problems]
In order to achieve the above object, the first aspect of the present invention is to mount an engine and a driver's seat on a front part of a turning frame that is turnably mounted on an upper part of a lower traveling body having a crawler type traveling device, and a rear part thereof. tiltably a crawler type turning dump vehicle equipped with a vessel, a partition plate for dividing the rotating frame back and forth in the turning center position near the rotating frame provided with a (6), a vessel behind the partition plate in the rotating frame There are installed, both with arranged close to the engine to the partition plate, and placed transversely between the front end portion of the pivot in side view center and crawler running gear, the upper in the driver's seat of the engine in plan view Are arranged so as to overlap each other, and a floor board for placing the operator's feet is provided in front of the engine.
[0006]
According to the first invention, since the horizontal engine is provided between the turning center and the front end portion of the crawler type traveling device, the center of gravity of the engine is near the turning center and in the outer edge of the lower traveling body in plan view. Thus, it is possible to ensure vehicle stability during running and working. In addition, since the driver's seat is arranged above the horizontally mounted engine so as to overlap in plan view, the length in the vehicle width direction is determined only by the longer of the engine and driver's seat (usually the engine). The size of the swivel frame can be reduced by reducing the width direction. Similarly, the front and rear length of the turning frame can be made shorter than when the engine and the driver's seat are arranged side by side in the front and rear, and the vehicle can be downsized. Furthermore, since the engine is mounted using the space below the driver's seat, the height of the driver's seat can be kept low, and stability during operation in the driver's seat is good. As described above, a crawler-type turning dump vehicle that can be downsized and ensure stability can be obtained.
[0007]
A second aspect of the present invention is a crawler in which an engine and a driver's seat are mounted on a front part of a turning frame that is rotatably mounted on an upper part of a lower traveling body having a crawler type traveling device, and a vessel is mounted on a rear part of the rotating frame. In this type of swivel dump vehicle, the engine is installed sideways on the swivel frame, and a driver's seat is arranged above the engine so that they overlap each other in plan view, and a floor plate for placing the operator's feet in front of the engine In the center of the left and right of the front end of the floor plate, a control unit provided with a traveling lever part, a work machine lever part, a display panel, etc. is provided, on either the left or right side of the control part of the turning frame and the engine, A fuel tank for an engine and a hydraulic oil tank for driving a working machine such as a crawler type traveling device or a vessel or a swivel are arranged side by side.
[0008]
According to the second invention, similarly to the first invention, the driver's seat is arranged above the horizontally placed engine so as to overlap in a plan view, so that the width direction of the turning frame can be made smaller than before, and the longitudinal length of the turning frame is also increased. Since the vehicle can be shortened, the size of the vehicle can be reduced, and the height of the driver's seat can be kept low, and the stability during operation in the driver's seat can be ensured. Furthermore, because the bulky devices such as the fuel tank and the hydraulic oil tank are mounted side by side on the left and right sides of the control unit provided at the center of the front of the floor plate and the left and right of the engine, , The floor height above the ground can be kept low, and the ground height of the driver's seat can be lowered accordingly. As a result, it is possible to obtain a crawler-type turning dump vehicle that can be downsized and ensure stability.
[0009]
According to a third aspect of the present invention, in the second aspect of the present invention, the control unit is a control device in which a travel lever unit, a work implement lever unit, and a display panel are integrated and integrated.
[0010]
According to the third aspect of the invention, the steering device is configured by integrating the traveling lever portion, the work implement lever portion, and the display panel, so that it can be configured compactly, and tanks such as a fuel tank are provided on either the left or right side of the floor board. The installation space can be secured. In addition, since a relaxed space can be secured at the operator's feet on the floor, operability and comfort in the driver's seat can be improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described in detail with reference to the drawings.
[0012]
FIG. 1 is a side view of a crawler-type dump vehicle according to an embodiment, and FIGS. 2 and 3 are a plan view and a front view, respectively.
In these drawings, the crawler type dump vehicle 1 includes a lower traveling body 2 having a pair of left and right crawler traveling devices 3a and 3b attached to the lower part of a traveling frame 4, and is turned upward substantially at the upper center of the lower traveling body 2. The turning frame 11 of the body 10 is mounted so as to be turnable via a turning device 5 having a known configuration. Between the turning center O in a side view and the front end portion P of the crawler type traveling devices 3a and 3b at the substantially central portion in the width direction of the turning frame 11, the engine 12 has a crank shaft center in the left-right width direction of the turning frame 11. It is installed sideways so that it faces. A cooling fan 13 and a radiator 14 are provided in front of the engine 12 in the crankshaft direction, and a hydraulic pump 15 is attached to a lower rear portion in the crankshaft direction. A support frame (not shown) attached to the revolving frame 11 is provided above the engine 12, and the upper surface of the support frame is provided on the left and right sides of the engine 12, the cooling fan 13, and the radiator 14, in front and above. A covering exterior cover 30 is attached. A cooling air outlet 31 is formed on the outer surface of the exterior cover 30 in the vicinity of the radiator 14. A driver's seat 7 is mounted on the upper part of the exterior cover 30 above the engine 12.
[0013]
Further, a floor plate 32 for placing a foot of an operator seated on the driver's seat 7 is provided at a predetermined distance from the turning frame 11 in front of the driver's seat 7 and the engine 12 in the vehicle. A steering device 20 is mounted on a substantially central upper surface on the left and right sides of the front end portion of the floor board 32 at a position separated from the driver's seat 7 by a predetermined distance. Further, a fuel tank 16 is mounted at the front end portion of the revolving frame 11 at either the left or right end portion (right side in the drawing) so that the lower portion protrudes below the floor plate 32. A hydraulic oil tank 17 is mounted on the rear side of the engine 12 in the crankshaft direction.
[0014]
A partition plate 6 is provided behind the engine 12, and the rear of the engine 12 is covered with the partition plate 6. A vessel 8 is provided on the revolving frame 11 behind the partition plate 6 so as to be tiltable toward the rear of the vehicle, and a dump hydraulic cylinder 9 is attached between the revolving frame 11 and the vessel 8. . By the expansion and contraction of the hydraulic cylinder 9, the vessel 8 is tilted, and the load such as earth and sand in the vessel 8 can be dumped (discharged) freely. Further, a notch 6a is formed in the lower left part of the partition plate 6 below the engine 12, and a bracket provided at the lower end position of the revolving frame 11 so as to penetrate the notch 6a in the front-rear direction. A battery 18 is mounted on the top.
[0015]
Below the control device 20, hydraulic pressure such as the hydraulic cylinder 9 for dumping, the turning motor (not shown) of the turning device 5, and the hydraulic motors (not shown) of the crawler type traveling devices 3a and 3b, etc. In order to control the operation of the equipment, a control valve unit 28 for controlling the pressure oil from the hydraulic pump 15 is mounted. The control valve unit 28 is covered with a front cover 33.
[0016]
The control device 20 includes a travel lever portion, a work implement lever portion, a display panel 26, an engine speed setting dial 25, a power key switch 24, and the like, and is configured integrally.
The travel lever portion includes a pair of left and right travel levers 21a and 21b provided substantially at the center of the upper portion of the control device 20, and the control valve unit 28 controls the travel levers 21a and 21b according to the operation amount before and after the travel lever 21a and 21b. By controlling the flow rate and direction of pressure oil to the hydraulic motors of the pair of left and right crawler type traveling devices 3a and 3b, the vehicle can be operated forward or backward, and steering.
The working machine lever portion is composed of a turning lever 22 and a dump lever 23 provided at the upper part of the control device 20 and on the left and right of the traveling levers 21a and 21b, respectively, and drives the turning motor by operating the turning lever 22. The upper swing body 10 is swung, and the hydraulic cylinder 9 is driven by operating the dump lever 23 to tilt the vessel 8.
[0017]
The display panel 26 is mounted on the upper portion of the surface facing the driver's seat 7 and includes various meters indicating vehicle conditions such as vehicle speed, engine speed, fuel remaining amount, oil temperature and water temperature, and various alarms. It has a display for monitoring information, operation information, control information and the like.
The engine speed setting dial 25 is attached to the right side surface portion in FIG. 3 of the control device 20, and sets the speed of the engine 12 during traveling and working.
The power key switch 24 is attached to the left side surface portion of the control device 20 in FIG.
[0018]
Further, as shown in FIG. 3, on the lower right side of the control device 20, an operating portion provided with a lock lever 27 extending in the front-rear direction is projected from the front cover 33 so as to be swingable up and down. It has been. By operating the lock lever 27 to a substantially vertical position, the control valve unit 28 is locked and controlled so that the vehicle travels and works are stopped and cannot be operated. A passage has been secured so that people can enter and leave 7 freely. On the other hand, the lock lever 27 is swung to the driver's seat 7 side and tilted to a substantially horizontal state to release the lock control, and the operation of the travel levers 21a and 21b, the turning lever 22 and the dump lever 23 causes the vehicle to In addition to enabling travel and work, the passage is blocked so that the operator cannot carelessly leave the driver's seat 7 in this unlocked state.
[0019]
Next, the operation and effect of the above configuration will be described.
The engine 12 is installed sideways between the turning center O and the front end portion P of the crawler type traveling devices 3a and 3b at a substantially central portion in the width direction of the turning frame 11, and a driver's seat 7 is mounted above the engine 12. Then, they were arranged so that both of them overlapped in plan view. For this reason, the left-right width of the turning frame 11 is smaller than arranging the engine room and the driver's seat 7 side by side, and the vehicle width can be greatly reduced. Since the axial length of the engine 12 is usually longer than the lateral width of the driver's seat 7, the lateral width of the turning frame 11 is substantially determined by the axial length of the engine 12. Further, since the engine 12 is installed using the space below the driver's seat 7, the height of the driver's seat 7 and the length in the front-rear direction of the vehicle can also be suppressed.
[0020]
Furthermore, since the center of gravity of the engine 12 is installed near the turning center O and within the outer edge of the lower traveling body 2 in plan view, the vehicle is very stable during traveling and during work. Further, the fuel tank 16 and the hydraulic oil tank 17 having a large volume are arranged on the left or right side of the revolving frame 11 so as to be vertically long and project above the floor plate 32 and arranged side by side in the front and rear, and the battery 18 is disposed in the engine 12. The control valve unit 28 is mounted below the control device 20 in a space below the rear and on a bracket provided at the lower end position of the revolving frame 11. As a result, since there is no mounted device having a high height between the floor plate 32 and the revolving frame 11, the height of the floor plate 32 can be kept low.
Therefore, since the operation height at the driver's seat 7 can be lowered, the stability during operation of the control device 20 can be ensured.
[0021]
A vehicle body width W (here, representing the maximum left and right widths of the lower traveling body 2 and the turning frame 11), the engine 12 arranged horizontally with the crankshaft centered in the left and right width direction of the turning frame 11, and The horizontal width of the radiator 14 disposed on either the left or right side of the engine 12 and the tanks 16 and 17 disposed on the other left and right sides of the engine 12 is set to be substantially equal to the driver seat above the engine 12. 7 and a control unit is installed in front of the engine 12. As a result, the width of the vehicle body can be reduced and the vehicle body can be reduced in size, so that it is easy to travel into a narrow place and the height of the driver's seat 7 can be reduced, so that stability during operation in the driver's seat 7 is also good. .
[0022]
The revolving frame 11 has a partition plate 6 that divides the frame 11 back and forth at a position near the revolving center, and the vessel 8 is installed on the revolving frame 11 on the rear side of the partition plate 6 so as to be tiltable. The horizontal engine 12 is installed on the front turning frame 11 so as to be close to the partition plate 6. Thereby, since the horizontal engine 12 is installed close to the turning center of the turning frame 11, the engine 12 is positioned inside the ground contact range of the crawler type traveling devices 3a, 3b of the lower traveling body 2, There is little loss of running stability due to engine weight. Furthermore, even if the turning frame 11 turns, since the range of movement of the engine 12 in the left-right width direction of the lower traveling body 2 is reduced, turning stability can be improved.
[0023]
Further, the engine 12, the cooling fan 13, and the radiator 14 are surrounded by the partition plate 6 disposed on the rear side thereof and the outer cover 30 that covers the left and right sides, the front side, and the upper side. An installation location for the driver's seat 7 is provided on the upper surface. Thereby, since the engine 12 is surrounded by the partition plate 6 and the exterior cover 30, the external propagation of the engine noise is suppressed, and even if the driver's seat 7 is provided on the upper surface of the exterior cover 30, the noise spread to the operator can be reduced.
[0024]
Further, either one of the fuel tank 16 and the hydraulic oil tank 17 (the hydraulic oil tank 17 in the drawing) is arranged facing either the left or right side (the right side in the drawing) of the engine 12, and the other tank ( In the drawing, a fuel tank 16) is arranged in series in front of one tank, and in front of the engine 12, either the left or right is closed with the other tank, and the left and right other is opened to the driver's seat 7. The one-side boarding space 34 is provided. As a result, the tanks are arranged in series in the front-rear direction at the upper position of the revolving frame 11 by being moved to one side of the revolving frame 11 and facing the left and right side of the engine 12. Therefore, the tanks, the engine 12 and the control device 20 do not overlap in the front-rear direction, and the length of the previous frame 11 in the front-rear direction can be shortened, and the turning radius of the revolving frame 11 can be reduced.
[0025]
The control unit includes a control device 20 erected at the front end of the turning frame 11, and the control device 20 includes a pair of travel levers 21a and 21b, a turning lever 22, a dump lever 23, a display panel 26, and an engine speed setting. The control device such as the dial 25 and the power key switch 24 is arranged. As a result, the control devices of the crawler-type turning dump vehicle are concentrated and arranged at a position in front of the operator, so that the control operation can be facilitated and the control device 20 can be configured compactly, so that the operator's foot space can be secured. And comfortable and easy to operate. In addition, a space can be secured on either the left or right of the control device 20 and the driver's seat 7, and the fuel tank 16 and the hydraulic oil tank 17 can be disposed.
[0026]
As described above, according to the present invention, since the horizontally placed engine and the driver's seat are arranged so as to overlap each other, the left and right width and the longitudinal length of the turning frame can be reduced, and the vehicle can be greatly downsized. . In addition, since the horizontally installed engine is installed near the turning center, the stability of the turning frame can be secured, and the vehicle stability during traveling and working can be secured. Furthermore, since the floor surface in front of the driver's seat is lowered to keep the height of the driver's seat low, stability during operation at the driver's seat is good. Furthermore, since the integrated control device is attached to the upper surface of the front surface of the front surface, the front surface device is configured compactly, and an empty space can be secured at the operator's feet, so Operability can be improved.
[Brief description of the drawings]
FIG. 1 is a side view of a crawler type dump vehicle according to an embodiment.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is a front view of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Crawler type turning dump vehicle, 2 ... Lower traveling body, 3a, 3b ... Crawler type traveling device, 4 ... Traveling frame, 5 ... Turning device, 6 ... Partition plate, 6a ... Notch part, 7 ... Driver's seat, 8 DESCRIPTION OF SYMBOLS ... Vessel, 9 ... Hydraulic cylinder, 10 ... Upper turning body, 11 ... Turning frame, 12 ... Engine, 13 ... Cooling fan, 14 ... Radiator, 15 ... Hydraulic pump, 16 ... Fuel tank, 17 ... Hydraulic oil tank, 18 ... Battery, 20 ... Control device, 21a, 21b ... travel lever, 22 ... swivel lever, 23 ... dump lever, 24 ... power key switch, 25 ... engine speed dial, 26 ... display panel, 27 ... lock lever, 28 ... Control valve unit, 30 ... exterior cover, 31 ... discharge port, 32 ... floor plate, 33 ... front cover, O ... turning center, P ... front end.

Claims (5)

A swivel frame (11) that is pivotably mounted on an upper part of a lower traveling body (2) having a crawler type traveling device (3a, 3b) is equipped with an engine (12) and a driver's seat (7) at the front part thereof. , a mounted crawler turning dump vehicle Bessel (8) tiltable in its rear,
A partition plate (6) for dividing the swivel frame forward and backward at a position near the swivel center of the swivel frame (11),
The vessel (8) is installed on the rear side of the partition plate (6) in the swivel frame,
Installing the engine (12) as well as arranged close to said partition plate (6), transversely between said pivot in a side view (O) and the front end portion of the crawler type traveling device (3a, 3b) and (P) And
Arrange the driver's seat (7) above this engine (12) so that they overlap in plan view,
A crawler-type turning dump vehicle characterized in that a floor plate (32) for placing an operator's feet is provided in front of the engine (12). In the center of the left and right of the front end portion of the floor plate (32), a traveling unit, a working unit lever unit, a control unit including a display panel (26) and the like are provided,
A fuel tank (16) for the engine 12 and the crawler type traveling device (3a, 3b) or vessel (8), turning, etc. on the left or right side of the steering part and the engine (12) of the turning frame (11) A hydraulic oil tank (17) for driving the work equipment was mounted side by side.
The crawler-type turning dump vehicle of Claim 1 . The crawler-type swivel dump truck according to claim 2, wherein the control unit is a control device (20) in which a travel lever unit, a work implement lever unit, and a display panel (26) are integrated and integrated. vehicle.   A hydraulic pump (15) disposed adjacent to the engine in a crankshaft direction substantially parallel to the short side direction of the vehicle body,
The crawler-type turning dump vehicle of any one of Claim 1 to 3.   A cooling fan (13) and a radiator (14) disposed adjacent to the engine (12) on the opposite side of the hydraulic pump (15) in the crankshaft direction substantially parallel to the short side direction of the vehicle body, In addition,
The crawler type turning dump vehicle of any one of Claim 1 to 4.

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