JPH10195908A - Side-pitch excavation work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute an excavation work including side-ditch excavation without providing a parallelogrammatic link mechanism. SOLUTION: A boom swing mechanism consists of a swing pin 5 and a boom swing cylinder, and an arm swing mechanism holds an arm 8 so that the arm 8 can swing in the vertical direction. There are provided a bracket 6 to hold an arm cylinder 12 for driving the arm 8, a vertical pin 7 to horizontally and swingably support the bracket 6, and an arm swing cylinder 11 to swing the bracket 6 in the horizontal direction through the pin 7, and a boom constituting the front comprises a two-piece boom 4 consisting of a first division boom 4a and a second division boom 4b which are vertically swingably connected to each other, and a first boom cylinder 10 for driving the boom 4a and a second boom cylinder 10a for driving the boom 4b are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digging machine such as a hydraulic excavator having a digging function, and more particularly, to a boom that can be turned in a vertical direction, and a boom that can be turned in a horizontal direction perpendicular to the vertical direction. TECHNICAL FIELD The present invention relates to a gutter work machine having a boom swing mechanism for holding as much as possible.

[0002]

2. Description of the Related Art An example of this type of conventional trenching work machine is disclosed in Japanese Patent Application Laid-Open No. Hei 6-136778. Hereinafter, this conventional technique will be described with reference to FIGS.

The prior art shown in FIGS. 7 and 8 is a hydraulic excavator having a trenching function, and includes a traveling device 31, a revolving body disposed on the traveling device 31, that is, a body frame 32, and a body frame 32. A driver's seat 33 is provided above the driver's seat 32.

[0004] Further, a front boom 34 is disposed in front of the body frame 32 and performs excavation work. The front boom 34 can be rotated vertically.
And an offset boom 41 connected to the main boom 34 so as to be capable of turning in a lateral direction orthogonal to the vertical direction.
A bucket arm 38 connected to the tip of the offset boom 41 so as to be rotatable in the vertical direction, and a bucket 39 connected to the bucket arm 38 so as to be rotatable in the vertical direction. A boom cylinder 40 for driving the main boom 34 and one end of the main boom 34
An offset cylinder 45 for driving the offset boom 41, an arm cylinder 42 for driving the bucket arm 38, and an offset cylinder 45 for driving the offset boom 41. And a bucket cylinder 43 for driving the bucket 39.

As shown in FIG. 7, a rod 46 is arranged on the opposite side of the offset cylinder 45 so as to sandwich the offset boom 41 described above. This rod 46
Of the bracket 4 supporting the bucket arm 38
9 is connected to the base 9 via a vertical pin 47a so as to be relatively rotatable.
The other end is connected to a bracket fixed to the side of the main boom 34 via a vertical pin 47b so as to be relatively rotatable. That is, a parallelogram link is formed by the rod 46 and the offset boom 41. This parallelogram link is driven by the offset cylinder 45,
By changing the shape of the quadrilateral, the bucket arm 38 and the bucket 39 are moved in parallel as indicated by the two-dot chain line in FIG.

The above-described main boom 34 is connected to the body frame 32 via a swing support 35 so as to be capable of turning in the lateral direction. As shown in FIG. 7, a swing cylinder 35a is disposed near the swing support 35, one end of which is rotatably connected to the main boom 34, and the other end of which is relatively rotated with respect to the body frame 32. It is movably connected. The swing support 35 and the swing cylinder 35a constitute a boom swing mechanism for holding the main boom 34 on the body frame 32 so as to be rotatable in the lateral direction. The traveling device 31 is provided with an earth removal plate 44 used for the earth removal work of the excavated earth and sand and the ground leveling work.

In this prior art, the main boom 34, the offset boom 41, and the bucket arm 38 are positioned in a straight line, and the boom cylinder 40, the arm cylinder 42, and the bucket cylinder 43 are appropriately expanded and contracted, as shown by a posture S1 in FIG. The main boom 34, the offset boom 41, the bucket arm 38, the bucket 39
Are selectively rotated in the vertical direction, and a normal excavation operation by the bucket 39 is performed.

Further, by turning the body frame 32 clockwise from the state of the posture S1 shown in FIG. 7 and extending the swing cylinder 35a and contracting the offset cylinder 45, the main boom 34 is turned counterclockwise in the lateral direction. , And the offset boom 41 rotates clockwise in the horizontal direction, and the state shown in the posture S2 of FIG. 7 is obtained. In this state, when the main boom 34, the bucket arm 38, and the bucket 39 are selectively rotated in the vertical direction as described above, the trenching operation on one side (the upper side in FIG. 7) can be performed.

In addition, by turning the body frame 32 counterclockwise from the state of the posture S1 shown in FIG. 7 and contracting the swing cylinder 35a and extending the offset cylinder 45, the main boom 34 is turned clockwise in the horizontal direction. , And the offset boom 41 rotates counterclockwise in the horizontal direction, and the state shown in the posture S3 of FIG. 7 is obtained.
In this state, it is possible to perform a trench work on the other side (the lower side in FIG. 7).

[0010]

In the above-mentioned prior art, the main boom 34 is provided via a parallelogram link mechanism formed by the offset boom 41 and the rod 46.
, The offset boom 41 is relatively displaced, and the bucket arm 38 and the bucket 39 are relatively displaced with respect to the offset boom 41.
, And the limit of the relative displacement of the bucket arm 38 with respect to the offset boom 41 are susceptible to mechanical limitations associated with the structure of the parallelogram link. Here, for example, when it is desired to normally excavate a portion outside the posture S2 in FIG. 7 (upper portion of the posture S2), and when the building 50 such as a pillar is located near the outside of the front, for example, It is conceivable that a desired excavation operation is performed by operating the body frame 32 to turn while maintaining the form of the posture S3 in FIG. 7. However, mechanical limitations associated with the above-described parallelogram link mechanism are considered. The offset cylinder 45 and the offset boom 41 can easily interfere with the building 50 by the
Cannot be positioned to extend sufficiently outward in the lateral direction, and the area where the bucket 39 can excavate may be restricted. The same applies to a case where a building 51 such as a pillar exists outside the front forming the posture S3 of FIG. 7 and the outer portion of the posture S3 (the lower portion of the posture S3) is normally excavated. It is.

The above-mentioned prior art requires a rod 46 for forming a parallelogram link mechanism, two vertical pins 47a and 47b, a bracket for mounting these vertical pins 47a and 47b, and the like. The number is large, the production is complicated, the production cost is high, and the front weight tends to be basically heavy. Considering the weight balance with the body frame 32 that constitutes the revolving unit, the total length of the front is set longer. Is difficult to perform, and this also tends to limit the area where the bucket can excavate.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances in the prior art, and has as its object to perform a trench excavation operation capable of performing a trench excavation operation including a trench without interposing a parallelogram link mechanism. To provide a machine.

[0013]

Means for Solving the Problems To achieve the above object, an invention according to claim 1 of the present invention is directed to a revolving body, a boom connected to the revolving body in a vertically rotatable manner, An arm rotatably connected to the boom in a vertical direction, a bucket rotatably connected to the arm, and a boom for holding the boom on a revolving body so as to be rotatable in a lateral direction orthogonal to the vertical direction. An arm swing, comprising: a swing mechanism, wherein the boom swing mechanism is operated, and in which a ditch is excavated by the bucket, the arm is held by the boom so as to be rotatable in the lateral direction. In addition to the mechanism, the boom is configured as a two-piece boom including a first split boom and a second split boom that are connected to each other so as to be relatively rotatable in the vertical direction.

According to the first aspect of the present invention, the two-piece boom and the arm are kept in the most extended state by, for example, extending the first divided boom and the second divided boom to each other. By positioning these two pieces on a straight line and rotating these two-piece booms, arms, and buckets as appropriate, normal excavation work can be performed.

Further, the two-piece boom is extended to the most extended state by extending the first divided boom and the second divided boom as described above, and the boom swing mechanism is operated to rotate the two-piece boom in the lateral direction. In this state, the arm swing mechanism is operated to move the arm 2
By pivoting the arm relative to the piece boom in the lateral direction and appropriately rotating the arm, the two-piece boom, and the bucket in the vertical direction, the arm is aligned with the two-piece boom and the arm described above. It is possible to carry out a desired trench excavation which is arranged at a position shifted in parallel with the arm at the time of the normal excavation work.

Further, for example, from the state of the above-mentioned gutter work, the arm swing mechanism is operated to rotate the arm in the lateral direction so as to extend to the outside of the cut gutter, thereby forming a two-piece boom. When the arm is rotated in the vertical direction as appropriate while the first and second split booms are relatively rotated in the vertical direction relative to each other, the arm moves laterally with respect to the extension direction of the side groove formed as described above. Grooves that extend can be drilled.

The above-described boom swing mechanism merely rotates the two-piece boom in the lateral direction, and therefore includes means such as a boom swing cylinder capable of rotating the two-piece boom in the lateral direction with respect to the swing body. The arm swing mechanism only pivots the arm in the lateral direction relative to the two-piece boom, so that the arm swing mechanism also needs two arms. Any means including an arm swing cylinder that can be turned laterally with respect to the peace boom,
No parallelogram link is required. That is, by combining the operation of the boom swing mechanism and the operation of the arm swing mechanism, the arm can be moved in the horizontal direction without the interposition of the parallelogram link, and the trench can be realized.

Further, as described above, the arm is rotated in the vertical direction in accordance with the relative vertical rotation of the first split boom and the second split boom that constitute the two-piece boom, so that the horizontal direction is obtained. Can be formed. At this time, by appropriately considering the first split boom, the second split boom, and the rotation timing of the arm, the horizontal groove can be formed into a linear groove. It can be.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a gutter work machine according to the present invention. FIG. 1 is a side view showing an embodiment of the gutter work machine of the present invention. FIG. 2 is a side view showing a state of the embodiment shown in FIG. 1 during normal excavation.
Is a plan view showing an example of the operation of the embodiment shown in FIG. 1,
4 is a plan view showing another example of the operation of the embodiment shown in FIG. 1, FIG. 5 is a side view showing a state immediately before the start of the lateral groove excavation of the embodiment shown in FIG. 1, and FIG. It is a side view which shows the state at the time of the horizontal trench excavation of one Embodiment shown in FIG.

This embodiment is also an excavator, for example.
A traveling unit 1 having a pair of crawler tracks, a revolving unit 2 disposed on the traveling unit 1, and a driver seat 3 provided on the revolving unit 2
And a front desk which is disposed at a position in front of the revolving superstructure 2 and performs excavation work. The front is basically a two-piece boom 4 capable of vertical rotation and an arm 8 connected to the two-piece boom 4 and capable of vertical rotation.
And a bucket 9 connected to the arm 8 and rotatable in a vertical direction.

The above-described two-piece boom 4 includes a first divided boom 4 which is connected to each other so as to be relatively rotatable in the vertical direction.
a and a second divided boom 4b. The first split boom 4a is connected to the revolving unit 2 so as to be vertically rotatable, and the second split boom 4b is connected to the tip of the first split boom so as to be rotatable in the vertical direction. First split boom 4a
Is driven by a first boom cylinder 10 having one end rotatably connected to the revolving unit 2 and the other end rotatably connected to the first split boom 4a. The second split boom 4b is The second boom cylinder 10a has one end rotatably connected to the first split boom 4a and the other end rotatably connected to the second split boom 4b. The above-described arm 8 is driven by an arm cylinder 12, and the bucket 9 is driven by a bucket cylinder 13.

As shown in FIG. 3, a swing pin 5 for holding the two-piece boom 4 rotatably in the horizontal direction with respect to the swing body 2 and a first split boom having one end constituting the two-piece boom 4 4a and a boom swing cylinder 5a having the other end connected to the revolving unit 2. The swing pin 5 and the boom swing cylinder 5a constitute a boom swing mechanism for holding the two-piece boom 4 on the revolving unit 2 so as to be rotatable in the horizontal direction. Further, while holding the arm 8 rotatably in the vertical direction,
A bracket 6 for holding an arm cylinder 12 for driving the arm 8, a vertical pin 7 for supporting the bracket 6 rotatably in the horizontal direction with respect to the two-piece boom 4, and a two-piece boom 4 via the vertical pin 7 And an arm swing cylinder 11 for rotating the bracket 6 in the lateral direction. The bracket 6, the vertical pin 7, and the arm swing cylinder 11 constitute an arm swing mechanism that holds the arm 8 on the two-piece boom 4 so as to be rotatable in the horizontal direction. The traveling body 1 is provided with an earth removal plate 14 used for the earth removal work for excavated earth and sand and the ground leveling work.

In the embodiment configured as described above, for example, as shown in the posture S11 of FIG. 3, the two-piece boom 4 is divided into the first divided boom 4a and the second divided boom 4a at a substantially central front position of the swing body 2. Boom 4b is extended to the most extended state, and in this state, the two-piece boom 4
And the arm 8 are arranged on a straight line, and the first boom cylinder 10, the arm cylinder 12, and the bucket cylinder 13
By appropriately operating, the boom 4, the arm 8, and the bucket 9 are selectively rotated in the vertical direction, and a desired normal excavation operation can be performed as shown in FIG.

Also, from the state of posture S11 in FIG.
By rotating the revolving unit 2 in the clockwise direction, and extending the boom swing cylinder 5a to rotate the two-piece boom 4 relatively to the revolving unit 2 in the lateral direction (counterclockwise direction in FIG. 3). , S12, and excavation of a groove substantially along an extension of one crawler belt (upper crawler belt in FIG. 3) of the traveling body 1, that is, a side ditching operation can be performed.

Also, from the state of the posture S11 in FIG.
By rotating the revolving unit 2 in the counterclockwise direction and by contracting the boom swing cylinder 5a to rotate the two-piece boom 4 relative to the revolving unit 2 in the lateral direction (clockwise direction in FIG. 3). , S13, and the ditching work along the substantially extended line of the other crawler belt (the lower crawler belt in FIG. 3) of the traveling body 1 can be performed.

For example, when the revolving unit 2 is held stationary and the boom swing cylinder 5a and the arm swing cylinder 11 are contracted from the posture S11 during normal excavation shown in FIG. 4, the arm 8 moves in parallel from the posture S11. The arm 8 can be made to protrude considerably outside of one of the crawler tracks (the upper crawler track in FIG. 4) of the traveling body 1, and the guttering operation is performed at the protruding position. Can be.

When the arm swing cylinder 11 is fully extended from the state of the posture S14 in FIG. 4, the arm 8 turns clockwise in FIG.
The state shown in FIG. 14a is obtained, and normal excavation along the left-right direction at the diagonally right front position of the revolving superstructure 2 becomes possible. FIG.
The state at this time is shown. From this state, the first divided boom 4a, the second divided boom 4b of the two-piece boom 4,
The first boom cylinder 10 and the second boom cylinder 10 are moved so that the timing of the rotation of the arm 8 becomes appropriate to each other.
a, by driving the arm cylinder 12 and the bucket cylinder 13, forming a lateral linear groove perpendicular to the aforementioned lateral groove, for example, the linear lateral groove formed by the posture S14 in FIG. Can be. FIG.
Indicates the state of excavation work at this time.

As described above, when the revolving unit 2 is held stationary from the posture S11 during normal excavation shown in FIG. 4 and the boom swing cylinder 5a and the arm swing cylinder 11 are extended, the arm 8 moves from the posture S11. The arm 8 can be made to move to the posture S15 by moving in parallel, and the arm 8 can be made to protrude considerably outside of the other crawler belt (the lower crawler belt in FIG. 4) of the traveling body 1. Can be implemented.

When the arm swing cylinder 11 is sufficiently contracted from the state of the posture S15, the arm 8 is rotated outward by 90 ° in the counterclockwise direction in FIG.
And the normal excavation along the left-right direction at the diagonally forward left position of the revolving superstructure 2 becomes possible. At this time, as described above, the first divided boom 4a of the two-piece boom 4
By operating the split boom 4b and the arm 8 so that the timing of the rotation is mutually appropriate, for example, a lateral linear groove orthogonal to the linear side groove formed by the posture S15 in FIG. Can be formed.

In the embodiment configured as described above,
Since the boom swing mechanism is constituted by the swing pin 5 and the boom swing cylinder 5a, the boom swing mechanism does not require a parallelogram link structure.
Since this mechanism is constituted by the vertical pin 7 provided on the bracket 6 and the arm swing cylinder 11, this mechanism does not require any parallelogram link structure. That is, it is possible to realize the normal excavation, and to realize the side ditch by moving the arm 8 in parallel without interposing the parallelogram link.

Therefore, the limit of the relative displacement of the arm 8 with respect to the two-piece boom 4 depends on the stroke of the arm swing cylinder 11, and the two-piece boom 4
The arm 8 is turned over a wide area of 90 ° from a state in which a side ditch is possible, as exemplified by the posture S14 and the posture S14a shown in FIG. Can be. Accordingly, for example, FIG.
The arm swing cylinder 11 is driven even when it is desired to normally excavate a further outer portion (upper portion in FIG. 4) of the posture S14 of FIG. 4 and the building 15 such as a pillar is located near the outside of the front. Arm 8 to 90 °
By rotating in the lateral direction, a desired excavation operation can be performed without causing interference between the building 15 and the front. That is, the arm 8 can be positioned so as to be sufficiently extended laterally outward, and the bucket 9
This allows a relatively large area to be excavated. This is the case when there is a building 16 such as a pillar outside the front forming the posture S15 in FIG. 4 and when it is desired to normally dig a further outer portion of the posture S15.
The same can be done as shown in FIG.

In this embodiment, as described above, a rod for forming a parallelogram link mechanism in the arm swing portion and a vertical pin for connecting such a rod are not required. And the production is relatively easy, and the production cost can be kept low. Further, the front weight can be reduced, and the total length of the front including the two-piece boom 4 and the arm 8 can be set relatively long even in consideration of the weight balance with the revolving superstructure 2 constituting the main body. This also makes it possible to widen the area where the bucket 9 can excavate.

In the above embodiment, as illustrated in FIG. 1, the two-piece boom 4 mounted in front of the swing body 2
The arm swing cylinder 11 for rotating the arm 8 in the lateral direction is attached to the left position of the second split boom 4b, and the arm swing cylinder 11 is moved to the left position of the second split boom 4b. Alternatively, it may be mounted on the right side position. In the case of such a configuration, for example, in the case of the above-described posture S14 in FIG. 4, the arm swing cylinder 11 may be extended in the opposite direction to the above, and
In the case of setting the posture S14a, the arm swing cylinder 11 may be contracted in the opposite manner as described above. Posture S15, S
The same applies to 15a. Therefore, even in the case where the mounting position of the arm swing cylinder 11 is changed in this way, the same operation and effect as the above-described embodiment can be obtained.

[0034]

According to the present invention, it is possible to realize excavation work including ditching without interposing a parallelogram link mechanism, that is, an arm swing without a mechanical constraint peculiar to the parallelogram link mechanism. The arm can be rotated over a wider area from the state where the side ditch can be excavated via the mechanism, so that a desired normal excavation operation can be performed, and workability can be improved as compared with the related art.

Further, as described above, since there is no need for a rod for forming a parallelogram link mechanism in the arm swing portion or a vertical pin for connecting such a rod, the number of members is smaller than in the prior art. The production is relatively easy and the production cost can be kept low. Furthermore, with the reduction in the number of members, the weight of the front can be reduced, and the overall length of the front can be set relatively long even when the weight balance with the revolving superstructure constituting the main body is taken into consideration.
This also allows for a larger excavation area,
Workability can be improved as compared with the related art.

Also, since the boom is constituted by a two-piece boom comprising a first split boom and a second split boom, the arm swing mechanism and the boom swing mechanism are operated, and the first split boom and the second split boom are operated. By appropriately considering the rotation timing of the arm and the operation, it is possible to linearly form a groove in a direction perpendicular to the side ditch, and to obtain excellent ditch excavation performance. .

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a gutter work machine of the present invention.

FIG. 2 is a side view showing a state during normal excavation of the embodiment shown in FIG. 1;

FIG. 3 is a plan view showing an example of the operation of the embodiment shown in FIG.

FIG. 4 is a plan view showing another example of the operation of the embodiment shown in FIG. 1;

FIG. 5 is a side view showing a state immediately before the start of excavation in the lateral direction in the embodiment shown in FIG. 1;

FIG. 6 is a side view showing a state at the time of excavation in a lateral direction of the embodiment shown in FIG. 1;

FIG. 7 is a plan view showing a conventional gutter work machine.

FIG. 8 is a side view of the gutter work machine shown in FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Running body 2 Revolving structure 4 2 piece boom 4a 1st division boom (2 piece boom) 4b 2nd division boom (2 piece boom) 5 Boom swing pin (Boom swing mechanism) 5a Boom swing cylinder (Boom swing mechanism) 6 Bracket (Arm swing mechanism) 7 Vertical pin (Arm swing mechanism) 8 Arm 9 Bucket 10 First boom cylinder 10a Second boom cylinder 11 Arm swing cylinder (Arm swing mechanism) 12 Arm cylinder 13 Bucket cylinder

Claims (2)

[Claims] 1. A revolving structure, a boom connected to the revolving structure in a vertically rotatable manner, an arm connected to the boom in a vertically rotatable manner, and a rotatable connection to the arm. A bucket, and a boom swing mechanism for holding the boom on a revolving body so as to be rotatable in a lateral direction orthogonal to the vertical direction. In a state where the boom swing mechanism is operated, excavation of a groove by the bucket is performed. A possible trenching machine, comprising an arm swing mechanism for holding the arm on the boom so as to be rotatable in the lateral direction, and the booms are connected to each other so as to be relatively rotatable in a vertical direction. A side-grooving work machine comprising a two-piece boom comprising a first split boom and a second split boom. 2. A bracket for holding the arm rotatably in a vertical direction, and a bracket for holding an arm cylinder for driving the arm, the arm swing mechanism comprising: A vertical pin rotatably supported; and an arm swing cylinder for rotating the bracket in the lateral direction with respect to the boom via the vertical pin, wherein the first split boom of the two-piece boom is vertically extended. The side-grooving work machine according to claim 1, further comprising a first boom cylinder that rotates in a direction, and a second boom cylinder that rotates the second split boom in a vertical direction.