JP2000314147A - Bucket device for excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform satisfactory various work such as excavation, shaping without changing the location together with an excavator in a bucket device to be mounted to the arm of the excavator and used. SOLUTION: A bucket device 11 is provided with a mounting base 12 to be rotatably mounted to the tip part of the arm 7 of an excavator 1 via a shaft 13, a bucket 19 to be rotatably mounted to the mounting surface 12c of the mounting base 12 via a rotation transmitting mechanism 18, and a hydraulic motor 16 to rotate the bucket 19. As it is possible to rotate the bucket 19 not only (the arrow D) in a plane of rotation of the arm 7 via the shaft 13 but also (the arrow E) on the center line O2, it becomes possible to perform various work such as excavation, shaping without changing the location together with the excavator 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator bucket device which is used by being attached to the tip of an arm of an excavator.

[0002]

In an excavator such as a backhoe, a driver's cab is provided on a swivel base and a boom is provided so as to be rotatable in a vertical direction, and an arm is provided at a tip end of the boom. The bucket is rotatably provided, and a bucket is rotatably provided at the tip of the arm via a shaft. In this type of excavator, the boom and the arm are each turned by a hydraulic cylinder, and the bucket is turned by a hydraulic cylinder via a bucket link. By operating these booms, arms and buckets and turning the swivel, the buckets can be used to excavate soil, scoop up debris, load them into dump trucks, or shape slopes (laws). Used to do.

However, the bucket is configured to be rotatable via a shaft only in one plane on which the boom and the arm rotate. For this reason, for example, when excavating a ditch, the opening of the bucket cannot be directed to the side surface of the excavated groove, and the side surface of the groove is excavated in a direction intersecting the side surface. Can not. In order to excavate the side of the groove, it is necessary to change the position of each excavator. Further, when shaping a slope or the like on the outer surface of the bucket, work may not be possible unless the position of each excavator is changed even within the work range of the bucket.

[0004] The present invention has been made in view of the above circumstances, and an object thereof is to perform various operations such as excavation and shaping well without changing the position of each excavator. An object of the present invention is to provide an excavator bucket device that can be improved.

[0005]

In order to achieve the above object, a bucket apparatus for an excavator according to the first aspect of the present invention is rotatably attached to a tip end of an arm of an excavator via a shaft. A mounting base having a mounting surface substantially parallel to the axial direction of the shaft, and a mounting base rotatably mounted on the mounting surface of the mounting base about a center line substantially orthogonal to the shaft; The present invention is characterized in that a bucket having an opening in a plane intersecting with the plane and a drive source provided on the mounting base to rotate the bucket are provided.

According to the above means, the bucket attached to the tip of the arm of the excavator via the attachment base can rotate via the shaft in one plane on which the arm of the excavator rotates. In addition, the bucket can be rotated about a center line substantially orthogonal to the axis, so that the opening of the bucket can be directed sideways, for example, as seen by the driver of the excavator. Therefore, for example, when excavating a ditch, the opening of the bucket can be directed to the side surface of the excavated groove, and the side surface of the groove can be excavated in a direction intersecting the side surface. Will be possible. In addition, when the slope or the like is shaped on the outer surface of the bucket, by appropriately adjusting the angle of the bucket, it is possible to cope with the slope having various angles.

In this case, a rotation transmitting mechanism for transmitting the rotational force of the drive source to the bucket is provided between the mounting base and the bucket, and the rotation transmitting mechanism is a ring-shaped outer fixed to the mounting base. A ring, an inner gear rotatably disposed on an inner peripheral portion of the outer ring, the bucket connected thereto, and a ring-shaped internal gear having a plurality of teeth on the inner peripheral portion; It is arranged inside the gear at a position eccentric from the rotation center of the internal gear, and is provided so that the teeth of the outer peripheral portion mesh with the teeth of the internal gear, and is rotated by the drive source. Preferably, a pinion for rotating the bucket via the internal gear is provided based on the operation.

According to this structure, the bucket is rotated through the internal gear based on the fact that the pinion disposed at a position eccentric from the rotation center of the internal gear is rotated by the drive source, so that the bucket is rotated. The bucket can be rotated with a relatively small driving force unlike the case where the bucket is directly rotated by the drive source at the center of rotation of the bucket. Further, since the pinion is disposed inside the internal gear, the pinion and a driving source for driving the pinion can be prevented from protruding outward in the radial direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, in FIG. 5, the excavator 1 is a hydraulic backhoe. The swiveling base 4 is provided with a driver's cab 5 and a boom 6 so as to be pivotable at the center (see arrow A). The lower end of the boom 6 is rotatably supported by the swivel 4 and is provided to be rotatable in the up-down direction (see the arrow B). An arm 7 is provided at the tip of the boom 6 via a shaft 8 so as to be rotatable in the direction of arrow C. Boom 6 and arm 7
Are rotated by a hydraulic boom cylinder 9 and an arm cylinder 10, respectively.

A bucket device 11 according to the present invention is mounted on the tip of the arm 7.
The bucket device 11 will be described in detail. The mounting base 12 of the bucket device 11 is, as shown in FIGS.
A disk-shaped iron base plate 12a;
2a, two iron mounting plates 12b, 1
2b, the mounting plates 12b, 12b are rotatably mounted on the distal end of the arm 7 via a shaft 13, and the bucket link 14 is mounted via a mounting portion 13a.
Is rotatably attached to the tip of the.

The shaft 13 is perpendicular to the direction in which the arm 7 extends, and is attached to a mounting surface 12c of the base plate 12a (FIG. 1).
2 is substantially parallel to the axis 13 thereof. The arm 7 is provided with a hydraulic bucket cylinder 15, and the tip of a rod 15 a of the bucket cylinder 15 is connected to the bucket link 14. The mounting base 12 is configured to be rotated about the shaft 13 in the direction of arrow D by a bucket cylinder 15 via a bucket link 14.

A hydraulic motor 16 constituting a drive source is attached to a portion of the rear surface of the base plate 12a near the outer peripheral portion. One end of a plurality of hydraulic hoses 17 is connected to the hydraulic motor 16, and the other ends of the hoses 17 are connected to a hydraulic pressure source on the cab 5 side.

The mounting surface 12c of the base plate 12a
In addition, a bucket 19 is provided via a rotation transmission mechanism 18 so as to be rotatable along a mounting surface 12c about a center line O2 orthogonal to the shaft 13 (see an arrow E). As shown in FIGS. 2 to 4, the rotation transmitting mechanism 18 includes an outer ring 20 having a ring shape smaller than the base plate 12a, and a plurality of balls 21 on an inner peripheral portion of the outer ring 20 (see FIG. 4). A ring-shaped internal gear 22 having a plurality of teeth 22a formed on an inner peripheral portion thereof, and a rotatable internal gear 22 inside the internal gear 22. The pinion 23 is disposed at a position eccentric from the center line O2 (see FIG. 3), which is the center of rotation, and is provided so that the teeth 23a of the outer peripheral portion mesh with the teeth 22a of the internal gear 22. The pinion 23 is attached to the rotating shaft 16 a of the hydraulic motor 16.

The outer ring 20 is fixed to the base plate 12a of the mounting base 12 by screws 24,
Further, the iron bucket base 25 of the bucket 19 is used.
Are fixed to the internal gear 22 by screws 26. The outer ring 20 and the internal gear 2
2, a seal member 27 is provided so as to cover a gap between them, as shown in FIG. The above bucket 1
9 is a bucket base 25 and this bucket base 25
And an iron container-like bucket body 29 fixed to the mounting plates 25a, 25a by screws 28,
A rectangular opening 29a is formed on the upper surface side of the bucket body 29 in FIGS. Bucket body 29
The front side of the opening 29a (the right side in FIGS. 1 and 2)
And a plurality of excavating claws 30 are detachably attached by screws.

Therefore, the bucket 19 is attached to the mounting base 12.
Is mounted on the mounting surface 12c so as to be rotatable about the center line O2 through the rotation transmission mechanism 18 along the mounting surface 12c by one or more rotations, and an opening is provided on a surface intersecting the mounting surface 12c. It has a configuration having a portion 29a.

Here, when the pinion 23 is rotated by the rotating shaft 16a of the hydraulic motor 16, the internal gear 2 is rotated.
2 is rotated, and the bucket 19 is rotated about the center line O2 integrally with the internal gear 22. The hydraulic motor 16 is controlled by an operation in the cab 5. The above-described rotation transmission mechanism 18 has the same configuration as the above-described swivel seat bearing 4a that rotatably supports the swivel table 4 in the excavator 1 such as a backhoe. Are better.

Next, the operation of the above configuration will be described. Excavator 1
In the driver's cab 5, based on the driver operating the operation lever and the like, as shown in FIG. 5, the turntable 4 can be turned in the direction of arrow A about the center line O <b> 1, and the boom 6 and The arm 7 can be rotated in the directions of arrow B and arrow C.
3 and can be rotated in the direction of arrow E about the center line O2 by the hydraulic motor 16.

In this case, the bucket 19 is moved by the arrow D through the shaft 13 in one plane on which the boom 6 and the arm 7 rotate.
In addition to being able to rotate in the direction, it is also possible to rotate in the direction of arrow E around the center line O2 along the mounting surface 12c of the mounting base 12, so that, for example, the following can be performed.

(1) Since the pawls 30 and the openings 29a of the bucket 19 can be in a state of being horizontal when viewed from the driver of the excavator 1, for example, when the trench is excavated by the bucket 19, With the bucket 19 in a state in which the pawl 30 and the opening 29a face the side of the groove, the turning function of the swivel 4 is also used, so that the position of the excavator 1 is not changed and the side of the groove ( Excavation direction). In this case, although a large amount of excavation is not possible, it is effective when finishing the side surface of the groove.

(2) The bucket 19 can be set in a state where the claws 30 face the driver's seat 5 and the opening 29a faces upward (the state shown in FIGS. 1 to 3), and the claws 30 are set in the driver's seat 5 When the trench is excavated, the trench can be excavated in a direction approaching the driver's seat 5 and also excavated in a direction away from the driver's seat 5. It is possible to do. It is also possible to excavate diagonally. (3) In a state where the boom 6 and the arm 7 are rotated to the upper position, the bucket 19 can be in a state where the claw 30 thereof is directed upward. It becomes possible.

(4) With the claws 30 facing the side opposite to the driver's seat 5, the bucket 19 scoops cement mixed with, for example, water or sand, and lifts the bucket 19 to a high position. , The bucket 19 is rotated by the hydraulic motor 16 to rotate the bucket 19.
It is also possible to open the cement in a predetermined place. (5) When shaping a slope or the like on the outer surface of the bucket 19, by appropriately adjusting the angle of the bucket 19, it becomes possible to cope with a slope having various angles without changing the position of the excavator 1.

As described above, according to the present embodiment, the bucket 1
Reference numeral 9 indicates that the boom 6 and the arm 7 can rotate in the direction of arrow D via the shaft 13 in one plane in which the boom 6 and the arm 7 rotate, and the arrow about the center line O2 along the mounting surface 12c of the mounting base 12. Since it can be rotated in the E direction, various operations such as excavation and shaping can be performed well without changing the position of each excavator, thereby improving usability.

A rotation transmitting mechanism 18 is provided between the hydraulic motor 16 constituting the driving source of the bucket 19 and the bucket 19.
And the bucket 19 is rotated via the internal gear 22 based on the rotation of the pinion 23 disposed at a position eccentric from the rotation center of the internal gear 22 in the rotation transmission mechanism 18 by the hydraulic motor 16. With this configuration, the bucket 19 can be rotated with a relatively small driving force, unlike the case where the bucket 19 is directly rotated by the drive source at the center of rotation. Thereby, the load on the hydraulic motor 16 can be reduced. Further, since the pinion 23 is disposed inside the internal gear 22, the pinion 23 and the hydraulic motor 16 driving the pinion 23 can be prevented from protruding outside in the radial direction.

In addition, since the hydraulic motor 16 is used as a driving source of the bucket 19, in the case of the hydraulically driven excavator 1, piping of the hydraulic motor 16 can be easily performed. In addition, the hydraulic motor 16 can easily switch between normal rotation and reverse rotation, so that the usability is good.

FIG. 6 shows a second embodiment of the present invention. The second embodiment differs from the first embodiment in the following points. That is, the bucket body 32 of the bucket 31 rotatably provided on the mounting base 12 via the rotation transmission mechanism 18 is mainly used for shaping, and is shaped to be flatter than the bucket body 29 of the first embodiment described above. The surface 32b is large, and no excavation claw is attached to the opening 32a.

By using such a bucket 31, a horizontal surface 34a, such as a road, a slope 34 that rises forward,
b, the front slope 34c, the vertical face 34d, the upper slope 34e, the ceiling face 34f, and the like can be well shaped.

The present invention is not limited to the above embodiments, but can be modified or expanded as follows. As a drive source of the buckets 19 and 31, an electric motor may be used instead of the hydraulic motor 16. Also,
The buckets 19 and 31 may be rotated within one rotation without rotating more than one rotation. Bucket 19,
At 31, the bucket base 25 and the bucket body 2
9 and 32 may be integrated.

[0028]

As is clear from the above description, according to the present invention, the following effects can be obtained. Claim 1
According to the bucket apparatus for an excavator, in addition to the fact that the bucket of the excavator arm can rotate through an axis in one plane in which the arm of the excavator rotates, the bucket is centered on a center line substantially orthogonal to the axis. Therefore, various operations such as excavation and shaping can be performed satisfactorily without changing the position of each excavator, thereby improving usability.

According to the bucket apparatus for an excavator of the present invention, the bucket is rotated via the internal gear based on the fact that the pinion arranged at a position eccentric from the rotation center of the internal gear is rotated by the drive source. With this configuration, the bucket can be rotated with a relatively small driving force, unlike the case where the bucket is directly rotated by the drive source at the rotation center of the bucket. Further, since the pinion is disposed inside the internal gear, the pinion and a driving source for driving the pinion can be prevented from protruding outside in the radial direction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a first embodiment of the present invention.

FIG. 2 is a cutaway side view of a main part.

FIG. 3 is a cutaway front view of a main part.

FIG. 4 is an enlarged sectional view of a main part.

FIG. 5 is a side view of the entire excavator for explaining the operation.

FIG. 6 is a side view for explaining the operation of the second embodiment of the present invention.

[Explanation of symbols]

1 is an excavator, 4 is a turntable, 6 is a boom, 7 is an arm, 1
1 is a bucket device, 12 is a mounting base, 12c is a mounting surface, 13 is a shaft, 16 is a hydraulic motor (drive source), 18 is a rotation transmission mechanism, 19 is a bucket, 20 is an outer ring, 2
2 is an internal gear, 23 is a pinion, 25 is a bucket base, 29 is a bucket body, 29a is an opening, 31
Is a bucket, 32 is a bucket body, 32a is an opening, 3
2b indicates a shaping surface, and O2 indicates a center line.

Continuation of the front page (72) Inventor Hiroshi Inoue F-term of 5 Yagi Sangyo Co., Ltd. at 11 Fukada, Aoji, Miyoshi-cho, Nishikamo-gun, Aichi F-term (reference) 2D012 HA01

Claims (2)

[Claims] 1. A mounting base rotatably mounted on a tip of an arm of an excavator via a shaft, the mounting base having a mounting surface substantially parallel to an axial direction of the shaft, and the mounting surface of the mounting base. A bucket rotatably mounted about a center line substantially orthogonal to the axis, and having an opening in a plane intersecting with the mounting surface; and rotating the bucket by the mounting base. A bucket device for an excavator, comprising: a driving source provided in the excavator. 2. A rotation transmitting mechanism for transmitting a rotational force of a driving source to the bucket between the mounting base and the bucket, wherein the rotation transmitting mechanism has a ring-shaped outer ring fixed to the mounting base. A ring-shaped internal gear that is rotatably disposed on an inner peripheral portion of the outer ring, is connected to the bucket, and has a plurality of teeth on the inner peripheral portion; At the position eccentric from the rotation center of the internal gear,
A pinion that is provided so that a tooth portion of an outer peripheral portion meshes with a tooth portion of the internal gear, and that rotates the bucket via the internal gear based on rotation by the drive source. The bucket device for an excavator according to claim 1, wherein