JPH05244835A - Digger - Google Patents

Abstract

PURPOSE:To provide a digger smooth in turning, so designed that a digging blade is set up in a specific mode in the front part of a frame with covering belt traveling sections, thereby not making the body length unnecessarily long and enabling nursery stocks to be dug with root pots attached thereto. CONSTITUTION:A digging blade 8 is set up, via a vertically rotatable frame body B, in the front part of a frame 1 supported with covering belt traveling sections 3a, 3b, so as to be revolvable around the body centerline P-P. The length of the covering belt traveling part behind the revolving shaft center Q-Q of the frame B is made nearly equal to the extended length for the digging blade before the revolving shaft center in its digging operational attitude.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digging machine for digging a seedling or the like into a root pot with a digging blade that digs in a scooping manner while vibrating.

[0002]

2. Description of the Related Art A semi-circular arc-shaped excavating blade is mounted on an elevating frame mounted on the front of a walk-control type self-propelled vehicle, and the excavating blade is used to drive the width of the vehicle body. A digging machine is known in which a seedling or the like is dug into a root pot by rotating while oscillating in a direction orthogonal to the direction center line (see, for example, Japanese Utility Model Laid-Open No. 58-26848).

[0003]

By the way, in the conventional digging machine, the elevating frame body for supporting the digging blade is located at a position far forward of the ground contact portion of the front wheels of the four-wheel traveling type self-propelled vehicle body. Since it is configured to move up and down around the fulcrum axis, the rear part of the fuselage floats up when the excavation blade is lowered and vibrated to bite into the soil to dig up the roots of saplings. There is a problem that it is easy to lower the digging ability, and in order to prevent the rear part of the body from rising, a balance weight such as a battery and an oil tank had to be installed at the rear end of the body. Is long and requires a large operation space when turning around the vehicle, which is disadvantageous and inefficient in operation during normal operation or when operating the operation to match the digging blade to the root of the sapling to be mined. There was a problem. The present invention has been made for the purpose of solving the above problems in the conventional excavator.

[0004]

That is, a digging machine according to the present invention comprises an elevating frame body (up and down rotatably) at a front portion of a machine base (1) supported by crawler belt running portions (3a) (3a). B) is attached, and a digging blade (8) that rotates in the vehicle width direction with a rotation axis that coincides with the vehicle body center line (PP) is installed on the elevating frame body (B). In the excavator for excavating a seedling or the like in a root pot by vibrating and rotating the blade (8) by an excavation drive unit (5) installed in the elevating frame (B), the elevating frame ( The pivot axis (Q-Q) of B) is located in the vicinity of the ground contact front ends of the crawler belt running portions (3a) and (3b),
The crawler belt running portion (3) behind the rotation axis (Q-Q).
a) The contact length of (3b) and the extension length of the excavation blade (8) extending forward from the rotation axis (Q-Q) in the excavation work posture are substantially the same. It is characterized by being present.

[0005]

According to the excavator of the present invention, the rotary shaft center (Q-) of the elevating frame (B) that supports the excavation blade (8).
Q) is located near the ground contact front end of the track running parts (3a) (3b), and the ground contact length of the track running parts (3a) (3b) behind the rotation axis (Q-Q), and the rotation. Axial center (Q-
And the extension length of the excavating blade (8) extending forward from Q) in the excavation work posture is substantially the same,
Moreover, since the digging blade rotates on the rotation axis that coincides with the center line (P-P) of the vehicle body, before and after the digging blade (8) digs up the root of the seedling with the root pot. Direction load is received by the long ground contact surfaces of the crawler belt running portions (3a) (3b) located rearward from the rotation axis (Q-Q), and the rotation direction load of the excavation blade (8) is left and right. Crawler track (3
Since a) and (3b) can be firmly received, excavation with a good excavation capability can be performed. And since it is not necessary to install a balance weight at the rear end of the vehicle body, the vehicle body length is shortened and the turning ability is improved, and normal operation, operation in which the digging blade matches the root of the sapling to be digged The action can be carried out together advantageously.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is an overall side view of the excavator according to the present invention, and FIG. 2 is an overall plan view of the excavator. The excavator shown is composed of a self-propelled vehicle (A) and a self-propelled vehicle (A). It is composed of an elevating frame body (B) that is attached to the front part so as to be able to ascend and descend with respect to the self-propelled vehicle body.

The self-propelled vehicle body (A) has a pair of left and right crawler track running portions (3a) and (3b) for supporting the machine base (1), and a traveling mission (3) interlocking with an engine (2) mounted on the machine chassis (1). 4)
And a mounting portion (10) (10) for rotatably supporting the elevating frame body (B) in the vertical direction is provided in the front part of the machine base (1).

The engine (2) is mounted on the machine base (1) such that one crawler belt running portion (3a) is biased to the centerline (PP) of the self-propelled vehicle body (A). Its output shaft (14)
The other track running portion (3b) is projected to the alligator. Then, a transmission unit (6) for interlockingly connecting the output shaft (14) and the traveling mission (4), and interlocking between the output shaft (14) and an input shaft of a digging drive unit (5) described later. The connecting transmission part (7) is provided closer to the other crawler belt running part (3b) than the vehicle body center line (P-P).

Further, a necessary mechanism such as a hydraulic cylinder (11) and a hydraulic tank (12) for moving up and down the lifting frame (B) is arranged on the machine base (1). (12) is disposed on the side of the engine on the same side as the transmission parts (6) and (7), and has a hydraulic cylinder (11).
Is a hydraulic tank (1
It is arranged in the front part of the machine base facing 2) (see FIG. 2).
In addition, from the rear part of the machine base (1), a walking control handle (1
3) is extended.

On the other hand, in the elevating frame (B), the mounting arms (16) and (16) provided on the rear surface of the support frame (15) to which the excavation drive section (5) is mounted are attached to the mounting section (10) ( 10)
The piston rods of the hydraulic cylinders (11) are connected to the mounting portions (17) provided on the machine base (1) by being rotatably mounted on the machine base (1) respectively, and mounted on the rear surface of the support frame (15). Is composed of.

The excavation drive section (5) has a rear end portion as an input section (1
8) is input from one crawler track running part (3b) near the vehicle body center line (P-P), and a vibration imparting mechanism (19) is connected to the front part of the crawler track running part (3b). The output part (20) is provided in the front part, and the input part (1
The input shaft (21) of 8) is the mounting arm (16) (16).
It is provided so that its axis coincides with the axis of rotation (Q-Q), and is linked to the output shaft of the engine by the transmission section (7).

The output shaft (22) of the output unit (20)
Is projected forward such that its axis coincides with a line extending the vehicle body center line (P-P) forward. Output shaft (2
The rear base end of the excavation blade (8) is interlockingly supported by the excavation blade (8), and the excavation blade (8) is formed in a substantially semi-circular shape in plan view as seen in FIG. Has been
A pivot portion (23) whose center is located on the extension line of the axis of the output shaft (22) is provided at the tip end portion, and rotation of the output shaft (22) makes it possible to rotate the output shaft (22) with respect to the vehicle body center line (P-P). It is provided so as to rotate in a scooping manner in a direction orthogonal to each other.

Further, the excavating blade (8) is formed so as to have an appropriate width in the rotating direction and has an arc-shaped cross section, and is provided with a blade portion (24) at the rotating front edge. To be done. The pivoting portion (23) on the tip side of the excavating blade (8) is supported by a frame (9) extending from the support frame (15), and the frame (9) includes the transmission portion (6) ( 7) The base portion is attached to the side surface portion of the support frame (15) located at the installation side, and the forward extending portion is curved so as to follow the semi-arc shape of the excavating blade (8) in a plan view. , The supporting portion (2
5), the pivotally attached portion (23) at the tip of the excavating blade is rotatably supported. The above-described rotation axis (Q-Q) is located near the ground contact front end of the crawler belt running portions (3a), (3b), and the crawler belt running portion (3a) behind the rotation axis center (Q-Q). ) (3b) and the contact length of the excavation blade (8) extending forward from the rotation axis (Q-Q) in the excavation work posture are substantially the same. ..

[0014]

Next, the operation of the excavator constructed as above will be described. In the non-digging work posture, the digging blade (8) is stopped at the standby position along the frame (9) as shown in FIG. 2, and the lifting frame (B) is entirely hydraulic cylinder (11). Is raised around the rotation axis (Q-Q). Therefore, during normal operation of the digging machine in the non-working posture, the digging blade at the standby position, the frame supporting the digging blade, and one crawler track running portion (3a)
The engine, which is placed closer to the gutter, is in a diagonal position and the left and right balance of the entire machine is maintained to allow the vehicle to run straight ahead.In addition, a hydraulic tank, battery, etc. are arranged at the rear part of the vehicle body. Since it is not provided and the vehicle body length is short, it has good turning ability, so that the digging blade can be easily adapted to the trunk of a seedling or the like to be digging while operating with good straightness and turning.

After the excavation blade (8) is matched with the root of the seedling or the like to be excavated, the self-propelled vehicle body is stopped and the excavation drive unit (5) is actuated to move the lifting frame ( When B) is lowered about the center of the turning axis (Q-Q), in that state, the crawler belt running portion (3a) behind the turning axis (Q-Q).
The grounding length of (3b) and the forward extending length of the excavating blade (8) extending forward from the rotation axis (Q-Q) are substantially the same, and the vibrating excavating blade ( 8) is a blade (24)
The load when rotating through the soil by rotating the output shaft (22) while cutting into the soil from the crawler track running part (3a)
(3b) firmly receives it in the front-back and lateral directions.

After the root is cut off, the digging blade (8) is returned to the lower side of the root pot and the elevating frame (B) is raised to lift the seedling with the root pot. By appropriately moving the self-propelled vehicle body (A) forward and backward while maintaining the lifted state, it becomes possible to carry the dug up sapling or the like to another place. At this time, it is possible to reduce collapse of the root bowl by not applying vibration to the digging blade.

[Brief description of drawings]

1 is an overall side view of a digging machine according to the present invention.

FIG. 2 is an overall plan view of the excavator according to the present invention.

[Explanation of symbols]

 1 ... Machine stand 3a, 3b ... Belt running part 5 ... Horitori drive part 8 ... Horitori blade P-P ... Vehicle body center line Q-Q ... Rotation axis

Claims (1)

[Claims] 1. An elevating frame body (B) rotatably up and down in front of a machine base (1) supported by crawler belt running portions (3a) (3a).
Attached to the lifting frame (B), and the vehicle body center line (PP)
The excavation blade (8) that rotates in the vehicle body width direction with the rotation axis coinciding with is installed, and the excavation blade (8) is installed on the lifting frame body (B). In a digging machine for excavating a seedling or the like in a root bowl by rotating while vibrating by means of a sill, the rotation axis (Q-Q) of the elevating frame (B) is linked to the crawler belt running parts (3a) (3b). Crawler track running portion (3a) located in the vicinity of the grounding front end of the vehicle and behind the rotation axis (Q-Q).
The contact length of (3b) and the extension length of the excavation blade (8) extending forward from the rotation axis (Q-Q) in the excavation work posture are substantially the same. A digging machine characterized by that.