JPH084043A - Attachment for power shovel car - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an attachment for a power shovel car that does not change the mounting angle of the power shovel car with respect to an object such as a bucket to be mounted and has a wide adjustment range. [Structure] Pins 15 are provided in front holes formed in the main arm 11 and the link arm 12 of the power shovel car, respectively.
16, a block body 16a having a first hook portion 24 at the front lower portion, and a second hook having a U-shaped cross section that is rotatably supported by the block body 16a. Left and right swing support plates 25, 26 provided with a portion 27
And the left and right fixed support plates 22 and 23 and the rocking support plates 25 and 26 of the block body 16a respectively have female screw holes 2 at their centers.
Rotating rods 30 and 31 formed with 8 and 29, and adjusting bolts 32 that are screwed through the female screw holes 28 and 29, respectively.
And

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment used when attaching a bucket or the like to an arm of a power shovel car.

[0002]

2. Description of the Related Art A tip portion of a main arm and a tip portion of a link arm of a power shovel car have tip holes for attaching buckets and the like, and various buckets and forks are utilized by using the tip holes and pins. Etc. can be attached. Since the mounting and dismounting of the pin is troublesome in the field work, the applicant of the present application has previously described in Japanese Patent Application No. 6-98106 that the first and second connection holes having the connecting holes facing each other.
Block is rotatably attached by a connecting pin, the first and second upper parts are attached to a power shovel car, a bucket is attached to the lower part, and the rotation angle is adjusted by an adjusting screw provided in the middle. We proposed an attachment for a power shovel car that adjusts the distance between the hooks that form the pair of lower parts for attaching the bucket.

[0003]

However, in the power shovel car attachment filed above, when the adjusting screw is turned, not only the interval between the mounting parts such as the lower bucket is changed but also the upper power shovel car is mounted. Since the intervals between the mounting holes also change, the mounting angle of the power shovel car on the arm differs depending on the bucket to be mounted, and there is a problem that the operation is troublesome.
In addition, there is a problem that the adjustment hole of the lower hook portion is short with respect to the adjustment of the adjustment screw because it has a connecting hole in the center and a small space for mounting the adjustment screw. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an attachment for a power shovel car in which the mounting angle of the power shovel car with respect to an object such as a bucket to be mounted does not change and the adjustment range is wide. And

[0004]

A method according to the above-mentioned object.
The attachment for a power shovel car described is a left and right side plate having front and rear first and second mounting holes connected to front holes formed in a main arm and a link arm of the power shovel car, respectively, by pins. A block having a connecting plate for connecting the lower parts of the side plates, left and right fixed support plates attached to the front side of the lower part of the connecting plate, and a first hook portion having a U-shaped cross section provided in the front lower part of the fixed support plate. Body and
A second hook portion that penetrates through an opening provided in the center of the inside of the connecting plate and is rotatably supported by the left and right side plates inside the intermediate portion at the upper portion thereof and further has a U-shaped cross section at the lower portion thereof. And the left and right swing support plates are provided rotatably inside the left and right fixed support plates and inside the left and right swing support plates, respectively, and female screw holes are formed in the center in orthogonal directions. And a adjusting bolt which is fitted to the fixed support plate and the swing support plate and which is screwed through the female screw hole of the rotating rod. A power shovel car attachment according to a second aspect of the present invention is the power shovel car attachment according to the first aspect, wherein a power-type rotary drive source is provided at a tip portion of the adjustment bolt. The power here means hydraulic pressure, electricity, and air pressure.

[0005]

In the attachment for a power shovel car according to claims 1 and 2, since the front and rear mounting holes are formed in the upper part of the side plate forming the block body, and the positions thereof are fixed, the power shovel car arm is always fixed. The attachment for the power shovel car can be attached at the same opening angle. The load received when excavation work is performed by the attached lower bucket or the like is mainly received by the block body through the first hook portion, and the block body is provided with the connecting plate at the lower portion of the upper side plate. Since the fixed support plate is fixed to the lower part of the connecting plate and the first hook portion is provided at the tip of the fixed support plate, the block body according to the conventional example in which the opposite side plates are pin-coupled to each other is provided. The block body can support a large load. Moreover, since the impact load during excavation does not directly apply to the adjusting screw,
It is difficult for play to occur. The distance between the first and second hook portions can be widened because the second hook portion is attached to the swing support plate that rotates independently of the block body. Particularly, in the attachment for a power shovel car according to a second aspect of the present invention, the adjustment screw is provided with a power-type rotation drive source, and therefore, the first and second attachments are provided.
It is possible to adjust the distance between the hooks of the power shovel without manual operation, and for example, it is possible to perform remote control from the driver's seat of the power shovel car.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is a front view showing a usage state of the attachment for a power shovel car according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a view taken along the line AA in FIG.
FIG. 3 is a plan view of the attachment for the power shovel car.

As shown in FIGS. 1 to 4, an attachment 10 for a power shovel car according to an embodiment of the present invention is
Power shovel car main arm 11 and link arm 1
Pin 15 in the front holes 13 and 14 respectively formed in
A block body 16a made of a structure obtained by welding steel plates attached via 16 is provided. The block body 16
a is left and right side plates 19 and 20 having first and second mounting holes 17 and 18 connected to the front holes 13 and 14 via pins 15 and 16, respectively, and the side plates 19 and 2.
A connecting plate 21 connecting the lower part of 0, the left and right fixed support plates 22 and 23 attached to the front lower part of the connecting plate 21, and the front ends of the fixed support plates 22 and 23 are attached so as to be connected. And a first hook portion 24 having a U-shaped cross section.

Left and right swing support plates 25 and 26 are rotatably provided inside the left and right side plates 19 and 20, and second end portions of the swing support plates 25 and 26 are U-shaped in cross section. The hook portion 27 is provided. Then, the inside of the left and right fixed support plates 22 and 23 and the left and right swing support plates 25 and 26.
The rotating rod 3 is rotatably mounted inside and has female screw holes 28 and 29 formed in the center thereof in directions orthogonal to each other.
0 and 31 are provided, and the female screw holes 2 of the rotating rods 30 and 31 are provided.
Adjustment bolts 32 are screwed into the adjusting bolts 8 and 29, and the adjustment bolts 3
By turning 2, the swing support plates 25, 26 rotate, and the first and second hook portions 2 arranged opposite each other are turned.
The intervals of 4, 27 are changed.

Then, the left and right fixed support plates 22, 23
The guide plate 33 is attached to the
3 has a regular hexagonal column portion 3 at one end of the adjusting bolt 32.
A square hole 35, which is sufficiently larger than the maximum diameter of 4, is formed in the center. A loosening prevention plate 37 having a fixing hole 36 formed in the center thereof and having an inner side for sandwiching two opposite sides of the regular hexagonal column portion 34 is fitted and attached. A split pin hole 38 is formed in the regular hexagonal column portion 34, and after the loosening prevention plate 37 is mounted, the split pin hole 38 is prevented from coming off from the regular hexagonal column portion 34 so that the split pin can be mounted and fixed. Has become.

In FIGS. 1 and 2, reference numeral 45 is a bucket to be mounted, 46 is a protective cap for the adjusting bolt, and 4 is a protective cap.
7 is a bellows for the cover of the adjusting bolt, and 48 is a wrench for turning the regular hexagonal column portion of the adjusting bolt. The swing support plates 25 and 26 are rotatably attached to the insides of the side plates 19 and 20 by a pin 49, and the connecting plate 21 is provided with a substantially square opening 50. 26 projects downward from the connecting plate 21. Further, in FIGS. 1 to 3, reference numerals 51 to 54 denote bosses that reinforce the first and second mounting holes 17 and 18.

When the attachment 10 for a power shovel car is used, the adjustment bolt 32 is loosened by the wrench 48 to narrow the gap between the first and second hook portions 24 and 27, and the pin of the bucket 45 to be mounted. 55, 56
And the adjustment bolt 32 is rotated by the wrench 48 to widen the interval between the first and second hook portions 24 and 27, and the bucket 45 is attached to the power shovel car attachment 10. Then, the loosening prevention plate 37 is attached to the regular hexagonal column portion 34 of the adjusting screw 32 and is inserted into the removal hole 35, and the split pin is attached to the split pin hole 38 so that the loosening prevention plate 37 does not fall.

Next, an attachment for a power shovel car according to another embodiment of the present invention will be described.
As shown in FIG. 5, a hydraulic motor 57, which is an example of a power-type rotary drive source, is attached to the guide plate 33.
7 and the regular hexagonal column portion 34 are connected to each other. The hydraulic power source of the hydraulic motor 57 uses a hose so that it is taken from the power shovel car. As a result, the hydraulic motor 57 is rotationally driven from the control box provided at the driver's seat or another place, and the adjusting screw 32 is hydraulically rotated to achieve further automation.

The rotation of the adjusting screw by the hydraulic motor can be used for an attachment for a power shovel car that drives the first and second hook portions facing each other by using the screw, and the hydraulic pressure is the same as that of the present invention. It is also possible to prevent the adjusting screw from loosening by blocking the valve of the motor. Furthermore, since the hydraulic motor only needs to turn the adjusting screw, a hydraulic motor with a small torque can be used.

[0014]

As is apparent from the above description, the attachment for a power shovel car according to claims 1 and 2 has the following advantages.
Since the block body having the mounting hole provided at the fixed position is mounted, the mounting becomes easy. The impact load during excavation of the bucket is mainly applied to the block body, and a large load is not applied to the adjusting screw, so that it has a long life. Further, since the second hook portion facing the first hook portion arranged opposite to the back is attached to the swing support plate rotatably attached to the upper side plate, the first and second hook portions are provided. The intervals between the hooks can be widened. Furthermore, since the block body has a connecting plate that connects the left and right side plates at the bottom, the structure is more robust than the conventional one. Particularly, in the power shovel car attachment according to the second aspect of the present invention, since the adjusting screw is provided with the power type rotary drive source, it is possible to remotely control the work for attaching the bucket or the like to the power shovel car attachment.

[Brief description of drawings]

FIG. 1 is a front view showing a usage state of an attachment for a power shovel car according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a view taken along the line AA in FIG.

FIG. 4 is a plan view of the attachment for the power shovel car.

[Explanation of symbols]

 10 Attachment 11 Main Arm 12 Link Arm 13 Front Hole 14 Front Hole 15 Pin 16 Pin 17 First Mounting Hole 18 First Mounting Hole 19 Side Plate 20 Side Plate 21 Connecting Plate 22 Fixed Support Plate 23 Fixed Support Plate 24 First Hook part 25 Swing support plate 26 Swing support plate 27 Second hook part 28 Female screw hole 29 Female screw hole 30 Rotating rod 31 Rotating rod 32 Adjusting bolt 33 Guide plate 34 Regular hexagonal column portion 35 Extracting hole 36 Fixing hole 37 Loosening prevention plate 38 Split pin hole 45 Bucket 46 Protective cap 47 Cover bellows 48 Wrench 49 pin 50 Opening 51 Boss 52 Boss 53 Boss 54 Boss 55 pin 56 pin

Claims (2)

[Claims] 1. Left and right side plates having front and rear first and second mounting holes connected to front holes formed respectively in a main arm and a link arm of a power shovel car through pins, and a lower portion of the side plates. A connecting plate to be connected, left and right fixed supporting plates attached to the lower front side of the connecting plate, and a block body having a U-shaped first hook portion provided in the front lower part of the fixed supporting plate; A second hook portion having a U-shaped cross section is pierced through an opening provided in the center of the inner side of the connecting plate, and is pivotally supported by the left and right side plates inwardly of the middle portion at the upper portion thereof, and further in the lower portion thereof. Left and right swing support plates provided, and rotatably mounted inside the left and right fixed support plates and inside the left and right swing support plates, respectively, and female screw holes are formed in the center in a direction orthogonal to each other. Rotating rod, the fixed support plate and the swing support plate An attachment bolt for a power shovel car, comprising: an adjusting bolt which is screwed through a female screw hole of the rotating rod attached to the power shovel car. 2. The attachment for a power shovel car according to claim 1, wherein a power-type rotary drive source is provided at a tip portion of the adjusting bolt.