JPH06136778A - All-round rotary type excavator - Google Patents

Abstract

PURPOSE:To prevent the projection of the rear side of a machine body frame even though the excavator rotates 180 deg.; to make an operator sit on an operator seat in the stable condition constantly, and operate an operation pedal, even though the excavator is inclined longitudinally, by reclining the operator seat and the operation pedal; and to make the operator operate running operation levers with a single hand in the normal relaxed posture sitting on the operator seat. CONSTITUTION:In this all-round rotary excavator, a machine frame F is made rotatable 360 deg., a main boom 1 is made possible to swing to the left and to the right to the machine frame F, an offset boom 2 is installed between the main boom 1 and a bucket arm 3, and the rear side rotary circle of the machine frame F is arranged within the car width. And when the machine body is inclined in the longitudinal direction, an operator seat S and an operation pedal 6 are made possible to incline symultaneously to make the operator seat S and the operation pedal 6 horizontal. Furthermore, the left side and the right side running operation levers 7L and 7R are provided at the side of the operator seat S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full swing excavator such as a backhoe.

[0002]

2. Description of the Related Art FIG. 10 shows a main frame 1 swingable, an offset boom 2 provided, and a body frame F.
FIG. 11 is a plan view of a conventional full-swing excavator that can be fully swung, FIG. 11 is a plan view of a conventional full-swivel excavator that can be fully swung, and can swing the main boom 1 FIG. 3 is a plan view of the related art in which the main boom 1 cannot swivel and the offset boom 2 can be swiveled.

In the case of the prior art shown in FIG. 10, the body frame F is fully rotatable, the main boom 1 is swingable, and the offset boom 2 is also interposed. Since the center of all turning is not in the center of the main boom 1 and the body frame F is formed in a rectangular shape in a plan view, when turning the main boom 1 to arrange the bucket 4 at the leftmost position, The rear end of the machine body frame F largely protruded in the opposite right direction, and the work required space b was increased. In the case of the present invention, the machine body frame F is formed in a circular shape in a plan view, and the turning center thereof is located at the circular center position of the machine body frame F. Therefore, even if the machine body frame F is rotated, the width of the machine body is increased. Since it does not come out from the inside, the work-necessary space a becomes small, and it is possible to freely ditch a narrow alley.

Further, in the case of the prior art shown in FIG. 11, the body frame F can be fully swung and can swing at the base of the main boom 1, but between the main boom 1 and the bucket arm 3. Since the offset boom 2 is not interposed, the main boom 1 interferes with the gutter on the left side as shown in FIG. 11 and the gutter is difficult to see. In addition, there was a problem that the offset width c of the bucket 4 at the time of digging the gutter could not be made large.

Further, in the case of the prior art shown in FIG.
At the time of digging the right side gutter shown in FIG. 12, the main boom 1 and the offset boom 2 interfere with each other so that the gutter becomes difficult to see. Also, the bucket offset width d of the side groove is limited.

Further, in the conventional full-swing excavator, when excavating on a sloping ground, if the machine body tilts, the driver's seat and the operation pedal are simultaneously tilted, which makes it difficult for the operator to operate. is there.

Further, in the conventional full swing excavator,
The left and right levers were placed side by side in front of the driver's seat. Therefore, it was necessary for the operator to hold the traveling operation lever and operate it back and forth with the arm extended forward. Further, since the gap between the driver's seat and the traveling operation lever in the front is narrowed, it is difficult to get on and off the vehicle.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention makes the body frame F circular so that the rear turning circle fits within the vehicle width with respect to all the turns of the body frame F, and The center of all turns is arranged at the center of the circle, the main boom 1 can be swung, and the offset boom 2 is arranged between the main boom 1 and the bucket arm 3. Even if the aircraft is tilted, the driver's seat S
The operation pedal 6 is configured to be horizontal. Further, in order to reduce fatigue when the operator operates the traveling operation lever, the left and right traveling operation levers are provided upright on the operation column on the side of the driver's seat S.

[0009]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, it is a full swing type excavator capable of swinging the body frame F by 360 degrees, and the main boom 1
Is capable of swinging left and right with respect to the body frame F, an offset boom 2 is interposed between the main boom 1 and the bucket arm 3, and a rear turning circle of the body frame F is arranged within the vehicle width. Of.

Further, in order to make the driver's seat S and the operation pedal 6 horizontal when the body of the full swing excavator is tilted forward and backward,
At the same time, it is possible to tilt.

Further, in the full swing excavator, the left and right traveling operation levers 7L and 7R are arranged side by side on the driver's seat S.

[0012]

[Operation] Next, the operation will be described. When digging a gutter in a narrow alley or the like, the bucket 4 is excavated in a state in which it is projected to either the left or right of the machine body. In the case of the conventional full swing excavator, when the bucket 4 is swung to the most lateral position, the rear part of the machine body frame F projects to the side in a state of protruding from the vehicle width, which destroys the earthen wall and the wall. Or
He was in contact with passers-by and vehicles. In the case of the present invention, since the body frame F is circular and its center is at the same position as the center O of the swivel bearing 18, the rear portion of the body frame F does not project even when rotated by 180 degrees. In addition, even if the full swing excavator tilts back and forth,
By reclining the driver's seat S and the operation pedals 6L, 6R, the operator can always sit in the driver's seat S in a stable state and operate the operation pedals 6L, 6R. Further, since the traveling operation levers 7L and 7R are arranged side by side on the operation column 8 on the side of the driver's seat S,
The operator is in the normal comfortable posture sitting in the driver's seat S,
The traveling operation levers 7L and 7R are operated with one arm.

[0013]

EXAMPLES Next, examples will be described. 1 is an overall side view of a full swing excavator of the present invention, FIG. 2 is an overall plan view of the full swing excavator of the present invention, and FIG. 3 is a plan view showing the arrangement of each device inside a machine frame F. FIG. 4 is a side view of a configuration in which the driver's seat S and the operation pedal 6L can be reclined, FIG. 5 is a rear view of a configuration in which the operation pedal 6 can be reclined, and FIG. 6 is a structure of the driver's seat S in which the operator can recline. FIG. 7 is a front view, FIG. 7 is a drawing showing the operating pedal 6, a hydraulic cylinder for reclining the driver seat S, and a hydraulic circuit, FIG. 8 is a plan view showing the arrangement of the travel operating levers 7L and 7R, and FIG. 9 is a travel operating lever of the present invention. It is a perspective view which shows arrangement | positioning of 7L * 7R.

This will be described with reference to FIGS. A swivel base bearing 18 is arranged substantially in the center of the crawler type traveling device 10, and a body frame F capable of 360-degree full swivel is arranged on the swivel base bearing 18. As shown in FIG. 2, the body frame F is configured as a circular frame centered on the center O of the swivel bearing 18. A driver's seat S, a hood, and a canopy 17 are arranged on the body frame F, and the main boom 1 is attached to the front of the body frame F.
A swing support body 11 that swings freely is pivotally supported on a pivot shaft 23. It is the swing cylinder 5 that swings the swing support 11, which is interposed between the swing support 11 and the machine frame F. An earth discharging plate 16 is arranged on the side opposite to the main boom 1.

The lower part of the main boom 1 and the lower part of the boom cylinder 12 are pivotally supported by the swing support 11 which is pivotally supported by the body frame F by a pivot shaft 23. The main boom 1, the boom cylinder 12, and the swing cylinder 5 are integrally swung right and left. The main boom 1
An offset boom 2 that is offset to the left and right is pivotally supported at the upper end of the, and an offset cylinder 15 is provided along the offset boom 2. A bucket arm 3 is pivotally supported at the tip of the offset boom 2, and an arm cylinder 13 for vertically moving the bucket arm 3 is arranged. A bucket 4 is pivotally supported at the tip of the bucket arm 3, and a bucket cylinder 14 for rotating the bucket 4 is interposed. In the present invention, the machine body frame F is circular in plan view, and the center of the circular machine body frame F is made to coincide with the center O of the swivel base bearing 18. Therefore, even if the body frame F is rotated 360 degrees, the body frame F does not project to the left and right.

FIG. 3 shows the arrangement inside the hood above the machine frame F. A valve mechanism V is arranged under the driver's seat S, and an engine E is arranged on the right side of the machine body frame F in a diagonal direction of 45 degrees. The pump mechanism P is arranged on the crankshaft protruding to the left of the engine E, and the radiator 21 is arranged on the portion protruding to the right. A splitter 20, which is a rectifying plate for exhaust air, is arranged on the left side of the radiator 21.
A reserve tank 19 is arranged in the front part of the above, and a fuel tank 24 is arranged in the center front part.

As in the above structure, an offset boom 2 is interposed between the main boom 1 and the bucket arm 3 so that the main boom 1 can be offset to the left and right, and the lower portion of the main boom 1 is formed by the swing support member 11. , Airframe F
The body frame F has a circular shape, and the center of the circle is aligned with the center O of the swivel bearing 18. As a result, as shown in FIG.
In contrast to the conventional work required space b, the narrow work required space a enables ditch digging work.

Next, description will be given with reference to FIGS. 4, 5, 6 and 7. The driver's seat S is a seat reclining cylinder 25.
By 26, it can be rotated back and forth. The pivot point in the case of the back-and-forth rotation is 32. The elastic body 3 is provided below the driver's seat S in case the driver's seat S is largely rotated.
The recessed part into which 0 is inserted is configured. A reclining valve 32 that switches the pressure oil from the pump mechanism P is configured, and the reclining lever 31 that operates the reclining valve 32 simultaneously switches the pressure oil to the left and right reclining cylinders 25 and the pedal reclining cylinders 27 and 28. is there. As a result, the driver's seat S and the operation pedals 6L and 6R are reclining at the same time.

The pedal reclining cylinders 27 and 28 are arranged so that the operation pedals 6L and 6R are rotated back and forth at the same time when the driver's seat S is rotated back and forth.
The operation pedals 6L and 6R are a PTO operation pedal and a swing operation pedal, and the pedal reclining cylinder 2
By pivoting left and right around a ball joint arranged at the upper end of 7.28, the left and right links are configured to operate the PTO and the swing. Therefore, even if the operation pedals 6L and 6R recline back and forth by the pedal reclining cylinders 27 and 28,
The operation of PTO and swing is possible. Further, below the operation pedals 6L and 6R, a concave portion in which the elastic body 29 is fitted is formed, and the depression can be performed even when the operation pedals 6L and 6R are deeply inclined.

Next, a description will be given with reference to FIGS. As shown in FIG. 8, in the conventional full swing excavator, the traveling operation levers 7'L and 7'R are arranged in front of the driver's seat S. Therefore, when carrying out a traveling operation, it was necessary for the operator to put both arms forward and operate both levers. In addition, the traveling operation lever 7'L.7
The operation pedals 6L and 6R were arranged on both sides of the'R.

On the other hand, in the present invention, the traveling operation levers 7L and 7R are arranged in parallel with the operation column 8 on the left side of the driver's seat S. Therefore, it is only the left arm that operates the traveling operation levers 7L and 7R. When the left and right traveling operation levers 7L and 7R are simultaneously operated by the left arm, the vehicle moves straight, and when only one is operated, the vehicle travels. The right arm is not necessary for running operation. Reference numeral 9 is an accelerator lever, 41 is a work machine operating lever left, 42 is a work machine operating lever right, and 40 is an earth plate operating lever.

[0022]

Since the present invention is constructed as described above, it has the following effects. That is, since it is configured as in claim 1, the main boom 1 and the offset boom 2 do not enter the range of the field of view of the operator looking at the gutter excavation portion during excavation of the gutter, so that the visibility can be improved. . Further, as shown in FIG. 10, since the rear portion of the machine body frame does not project to the left and right as in the case of the conventional rectangular machine body frame F, the work required space a can be reduced, and the ditch can be dug in a narrow alley. I did. Further, since the body frame F does not project to the left and right from the width of the vehicle, it is no longer necessary to break the wall or come into contact with an obstacle or a passerby.

According to the second aspect of the invention, when the full swing excavator tilts forward and backward on a sloping ground, the driver seat S and the operation pedals 6L and 6R can be reclining forward and backward at the same time. The operator is prevented from slipping off the driver's seat S to reduce the risk, and the operation pedals 6L and 6R for supporting the body are set at the normal angle, so that the operation force is not particularly increased and the fatigue is small. .

The driver's seat S has the structure as described in claim 3.
By eliminating the travel control lever in front of the vehicle, the comfortability of the front part of the driver's seat S can be improved.
Further, by arranging the traveling operation levers 7L and 7R on the operation column 8 on the side of the driver's seat S, the left and right traveling operation levers 7L and 7R are operated by one arm, and the other arm can be rested. It reduces fatigue. Moreover, since the operator does not operate the traveling operation levers 7L and 7R in a state where the operator is bent forward, the operator's shoulder stiffness can be reduced.

[Brief description of drawings]

FIG. 1 is an overall side view of a full swing excavator of the present invention.

FIG. 2 is an overall plan view of the full swing excavator of the present invention.

FIG. 3 is a plan view showing the arrangement of respective devices inside a machine body frame F.

FIG. 4 is a side view of a configuration in which a driver's seat S and an operation pedal 6L can be reclined.

FIG. 5 is a rear view of the configuration in which the operation pedal 6 can be reclined.

FIG. 6 is a front view of a configuration in which a driver's seat S can be reclined.

FIG. 7 is a drawing showing an operating pedal 6, a hydraulic cylinder for reclining the driver's seat S, and a hydraulic circuit.

FIG. 8 is a plan view showing an arrangement of travel operation levers 7L and 7R.

FIG. 9 is a perspective view showing an arrangement of travel operation levers 7L and 7R of the present invention.

FIG. 10 is a plan view of a conventional full swing type excavator in which the main boom 1 can swing, the offset boom 2 is provided, and the body frame F can fully swing.

FIG. 11 is a plan view of a conventional full swing type excavator capable of full swing and swinging of the main boom 1.

FIG. 12 is a plan view of the related art in which the main boom 1 is not swingable and the offset boom 2 is interposed, which is capable of making full swings.

[Explanation of symbols]

 F Airframe Frame S Driver Seat 1 Main Boom 2 Offset Boom 3 Bucket Arm 4 Bucket 5 Swing Cylinder 6 Control Pedal 7 Travel Control Lever 11 Swing Support

Claims (3)

[Claims] 1. A full-swivel excavator in which a machine body frame F can be rotated 360 degrees, in which a main boom 1 can swing to the left and right with respect to the machine body frame F, and the main boom 1 and a bucket arm 3. A full-swing excavator, characterized in that an offset boom 2 is interposed between the two, and a rear swing circle of the body frame F is arranged within the vehicle width. 2. A full-swivel excavator, which is capable of tilting at the same time so that the driver's seat S and the operation pedal 6 are horizontal when the body of the full-swivel excavator is tilted back and forth. 3. A full swing type excavator in which left and right traveling operation levers 7L and 7R are arranged side by side on a driver's seat S in the full swing type excavator.