JPH02279835A - Excavating work car - Google Patents

Abstract

PURPOSE:To improve safety by a method wherein operations either in walking or standing positions of an operator are made possible by installing, over a lower car body equipped with crawler members, an upper car body so that it becomes capable of swinging, and by providing a footboard for the operator to the rear section of the upper car body. CONSTITUTION:To a lower car body 30 supporting crawler equipment 2L and the like, a blade 3 is installed and to an upper car body 1, an engine and the like is arranged, and a boom 4 equipped with an arm 5 is hinged to the front end of the car body 1. A swing-operating handle 8, an arm swing lever 10, a boom bucket lever 23 and operating direction levers 11 and 12 are installed to the rear end of an engine room 19 so that they are protruding therefrom, and a footboard 9 for an operator is further hinged thereto. Lift-up of the car body at execution of the work by the weight of the operator standing on the footboard 9 is prevented and, at the same time, handling of the levers becomes easy as the height of the levers 10 and 13 are made higher than the other levers, and thereby grasping of circumstances can be made sure. Therefore safety can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an excavation work vehicle that can be changed between a walking position and a riding position.

(b) Prior Art A walking type revolving excavation vehicle has been known for some time.

For example, there is a technique described in Japanese Utility Model Application Publication No. 60-4651.

(c) Problems to be Solved by the Invention However, in the conventional technology, since the work was performed only in a running position, there was a problem in that forward visibility could not be ensured during excavation work using a packet.

Furthermore, due to the compact structure, the weight of the machine was too light, causing problems such as the machine lifting up or falling over during excavation work.

The present invention is provided with an operator platform on which the operator can travel while traveling or during earth removal work using a blade, and on which the operator can ride during excavation work using a packet.

Furthermore, since the vehicle has two postures, the running posture and the riding posture, it is possible to select the position of the operating lever that matches each posture.

The engine is also covered so that you can see what's ahead when you're riding.

(d) Means for Solving the Problems The objects of the present invention are as described above. Next, the configuration for achieving the objects will be explained.

In an excavation work vehicle in which an upper body is rotatably mounted on a lower body having a running section, and a working machine, an engine, and an operating section are installed on the upper body, the operator's platform is placed behind the upper body, and the operator's stand is placed behind the upper body. This makes it possible to operate the vehicle in a walking position and in a riding position.

Additionally, the optimal position of the control lever can be selected for both walking and riding postures.

Further, the engine is disposed approximately in the center of the upper vehicle body, and a cover is provided to cover the engine.

(E) Embodiment The object and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

Fig. 1 is an overall side view of the revolving excavation vehicle of the present invention, Fig.
The figure is a rear view, FIG. 3 is a plan view, FIG. 4 is a side view showing the engine E, control pulp V, and operator platform 9 placed on the upper body 1, and FIG. 5 is a plan view. Figure 6 is a rear view, Figure 7 is a top view,
FIG. 8 is a side sectional view showing the lower vehicle body 30, the swing support part 29, and the upper vehicle body 1, FIG. 9 is a plan view showing the swing lock mechanism, and FIGS. 10 and 11 are 2 is a drawing showing an embodiment modified into a shape.

The overall configuration will be explained with reference to FIGS. 1, 2, and 3.

The crawler devices 2L and 2R constitute a running section.

The lower vehicle body 3 supports the crawler devices 2L and 2R.
0, the blade 3 is supported. The blade 3 can be rotated up and down by a hydraulic cylinder.

And by making it a traveling type, the overall weight is light, so
During excavation, the rear of the machine tends to lift up and fall forward, so to prevent this from falling, the blades 3 are grounded on the ground and an outrigger-like support is provided to prevent the machine from falling.

Furthermore, at the start of excavation, if the packet 6 is unable to penetrate into the hard ground, the front of the machine tends to lift up and fall backwards. By placing the blade 3 at the rear of the aircraft and touching the ground, it also serves as an outrigger to prevent the aircraft from tipping over backwards.

An engine compartment 19 is configured above the upper vehicle body 1,
In the engine chamber 19, an engine E and a control valve (2) are arranged.

Further, the engine compartment 19 is covered with a front cover 18 and a rear cover 20.

A pivot portion 1a of the boom 4 is provided from the front end of the upper vehicle body 1, and the boom 4 and the boom cylinder 17 are attached to the pivot portion 1a.
is supported.

A swing hydraulic cylinder 32 protrudes from the right side of the upper vehicle body 1 at the cough pivot portion 1a, and by horizontally rotating the boom 4 and the base of the boom cylinder 17 from side to side, trench digging is possible. -ing

An arm 5 is pivotally supported at the tip of the seam 4 and rotated by an arm cylinder 15. A packet 6 is pivotally supported at the tip of the arm 5, and the packet 6 is scooped up and rotated by a packet cylinder 16.

These devices constitute a working machine B.

Further, a step bracket 22 is protruded downward from the rear end of the engine compartment 19, and a fulcrum crossing spring 22 is attached to the lower end of the step bracket 22.
1 is interposed, and the operator's board 9 is arranged in ten sections.

Also, from the rear end of the engine compartment 19, there are a turning handle 8, an arm/swing lever 10, a boom/packet lever 13, left and right steering levers 11 and 12, and a blade lever 14.
is projected upward.

The arm/swing lever 10 is a lever that is operated while switching between an arm cylinder 15 and a swing hydraulic cylinder 32, and the boom/packet lever 13 is a lever that is operated while switching between a boom cylinder 17 and a packet cylinder 16.

The operator's platform 9 is not so much a place for the operator to rest his/her feet as it is for the operator to use his/her own weight as a weight to prevent lifting during work. ,
I always ride it when doing excavation work.

Therefore, the height H of the arm/swing lever 10 and the boom/packet lever 13, which are excavation-related levers, are adjusted to the height H of the arm/swing lever 10 and the boom/packet lever 13, so that the levers can be easily operated in this state, since the riding state is for excavating work. The height h is higher than the height h of the left and right steering levers 11 and 12 and the blade lever 14, which are levers operated in the steering state.

This allows the operator to perform excavation work, blade work, and driving work in an optimal posture.

Moreover, the turning handle 8 is a part that operates with a cage when turning the upper car body 1 with respect to the lower car body 30,
The cough swing handle 8 is provided with a lock release lever 7 for operating the swing lock mechanism.

Next, the explanation will be given with reference to FIGS. 4, 5, 6, 7, and 8.

A swivel joint 23 is arranged on a lower vehicle body 30 that connects the left and right crawler devices 2L and 2R.

The swivel joint 23 includes a swivel joint hub 23a fixed to the lower vehicle body 30 side and a swivel joint shaft 23b fixed to the upper vehicle body 1 side.

And around the swivel joint 23 there is a rotating support part 2.
It consists of 9.

The swing support part 29 is called a swing base bearing,
A bearing metal 36 is interposed between the external fixed body 29b and the internal rotating body 29a. A bearing ball may be interposed instead of the bearing metal 36.

A swing lock pin 25 is supported on the upper vehicle body 1 so as to be movable up and down. By operating the operating wire 27, the arm 26 is moved up and down, and the swing lock pin 25 at the tip of the arm 26 is moved up and down. Further, a return biasing spring 28 is interposed in the arm 26.

Further, a plurality of lock pin fitting holes 35 into which the swing lock pins 25 are fitted are opened in the opposing external fixing body 29b. In the embodiment shown in FIG. 9, the lock pin insertion hole 35
The number of lock pin insertion holes 35 is eight, and lock pin insertion holes 35 are arranged every 45 degrees.

These constitute the swing lock mechanism. The other end of the operating wire 27 is connected to a lock release lever 7 provided on the swing handle 8. By grasping and operating the lock release lever 7, the operator pulls out the swing lock pin 25 and removes the swing lock pin 25 from the upper vehicle body 1. This allows for free turning.

After rotating to an appropriate position, the swing lock pin 25 is lowered so that it fits into the designated lock pin insertion hole 35.

The front end of the upper vehicle body 1 is provided with the pivot portion 1a as described above, the swing hydraulic cylinder 32 is provided on the right side at a position away from the engine E, and the engine E is placed in the center. A control valve V is located at the rear. An operator platform 9 is supported at the rear of the control valve (2).

Further, as shown in FIG. 6, it is the left and right hydraulic motors 31L and 31R that give rotation to the driving sprockets of the crawler devices 2L and 2R.
31R, and a swivel joint 23 is provided in order to constantly supply pressure oil from a hydraulic pump provided in the engine to the hydraulic cylinder of the blade 3 even when the upper vehicle body 1 turns.

As shown in FIG. 4, a portion of the swivel joint shaft 23b is projected above the upper vehicle body 1, and a mounting table 38 for the engine E is supported in a floating state to avoid the portion of the swivel joint shaft 23b. , engine E
Hydraulic piping 39 leading to each part is passed between the mounting table 38 and the upper vehicle body l, thereby ensuring passage space for the hydraulic piping and making the whole compact.

Further, as shown in FIGS. 6 and 7, a hydraulic oil tank 37 is arranged on the left side of the engine E, the outer plate of the hydraulic oil tank 37 also serves as a cover for the engine compartment 19, and the bottom plate is attached to the upper vehicle body 1.
It is configured by combining the two.

And.

Next, the configuration of FIGS. 10 and 11 will be explained.

In this configuration, a seat-like protrusion 8a is provided on the swing handle 8 so that when the operator gets tired, he can sit on the swing handle 8 while riding on the operator stand 9. It is something.

(F) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

With the configuration as claimed in claim (1), when the operator is traveling and working using the blade 3, the operator is traveling and can reliably grasp the surrounding situation while traveling, so it is safe. ,Next, during excavation work, traveling is stopped and the operator rides on the operator stand 9 to operate the machine, so even though there are front and rear covers,
It is safe because you can see it from above.

Additionally, by increasing the total weight of the machine, it was possible to improve safety against falling during excavation.

With the configuration as claimed in claim (2), in the running position, the left and right steering levers 11 and 12 and the blade lever 14 necessary for running can be operated at a low position, resulting in good operability and safety. Also, when excavating, the arm swing lever 10 and boom packet lever 13 are located at the most optimal high position when riding in a riding position, so you do not have to take an unreasonable posture (work safely). It can be done.

With the structure as set forth in claim (3), the whole is compactly gathered at the central position, and the front cover 18 and the rear cover 20 can provide soundproofing for the engine E.

Furthermore, since the front cover 18 and the rear cover 20 are compact, forward visibility during excavation can be secured.

[Brief explanation of drawings]

Fig. 1 is an overall side view of the revolving excavation vehicle of the present invention, Fig.
Figure 3 is the same rear view, Figure 3 is the same plan view, Figure 4 is the side view showing the engine E, control valve ■, and operator platform 9 placed on the upper body l, and Figure 5 is the same plan view. Figure 6 is a rear view, Figure 7 is a top view,
FIG. 8 is a side sectional view showing the lower vehicle body 30, the swing support part 29, and the upper vehicle body 1, FIG. 9 is a plan view showing the swing lock mechanism, and FIGS. 10 and 11 are 2 is a drawing showing an embodiment modified into a shape. A...Operator B...Work equipment C...Operation unit D...Swivel lock mechanism E...Enginet...Upper vehicle body 2...Crawler device 3...Blade 7 ...Lock release lever 8 ...Swivel handle Applicant Yanmar Diesel Co., Ltd. Seirei Kogyo Co., Ltd.

Claims (3)

[Claims] (1) In an excavation work vehicle in which the upper body is rotatably mounted on the lower body with a running section, and the upper body is equipped with a work implement, engine, and operating section, the operator's platform is placed behind the upper body. An excavation work vehicle characterized in that the operator can operate the vehicle in a walking position and in a riding position. (2) The excavating work vehicle according to claim (1), characterized in that the operating lever position can be selected to an optimum position in a walking posture and a riding posture. (3) The excavating work vehicle according to claim (1), characterized in that the engine is disposed at a substantially central position of the upper vehicle body, and a cover is provided to cover the engine.