JPH0743203Y2 - Power shovel - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power shovel, and more particularly to a bucket structure.

[0002]

2. Description of the Related Art Conventionally, as this type of power shovel, one having the following structure is known. That is, as shown in FIG. 4, a bucket 21 is attached to the tip of the arm 20 of the power shovel. The bucket 21 is provided with a discharge port 22 with its rear surface opened, and the discharge port 22 is configured to be opened and closed by an opening / closing body 23 pivotally attached to the upper portion thereof. Then, with the opening / closing body 23 closed, the opening 24 of the bucket 21 excavates and scoops out the earth and sand, and the opening / closing body 23 is opened to discharge the earth and sand from the discharge port 22. The opening / closing body 23 is opened / closed by a hydraulic cylinder 25 having one end rotatably connected to the opening / closing body 23 and the other end rotatably connected to the bucket 21 side.

[0003]

However, in the above-mentioned conventional bucket 21, the entire back surface thereof is opened to form the discharge port 22, and the rear end of the opening 24 is supported only by the upper end of the opening / closing body 23. Therefore, when excavating earth and sand or the like with the same bucket 21 for a long period of time, the bucket 21 may be deformed or damaged. Further, the opening / closing body 23 has one side pivotally attached to the upper portion of the discharge port 22 and the other side extending to the bottom portion of the bucket 21,
In order to secure the sufficient discharge port 22 for discharging the earth and sand, the rod 25a of the hydraulic cylinder 25 has to be moved considerably to open the opening / closing body 23, and as a result, the earth and sand can be discharged quickly. There is a problem that you cannot do it. The present invention has been made in view of the above problems in the prior art, and an object of the present invention is to provide a power shovel having durability and capable of performing efficient work.

[0004]

Therefore, in the present invention, a boom pivotally attached to the main body and held down by the boom cylinder, and an arm pivotally attached to the tip of the boom and swingable by the arm cylinder are provided. In a power shovel comprising a bucket pivotally attached to the tip of the arm and tilted by a bucket cylinder, the bucket is tilted.
In addition, it is set so that it can be turned freely, and it covers the entire front side of the bucket.
In addition to providing an inclined surface , a discharge port is provided in the lower part on the back side ,
One side of the opening / closing body is pivotally attached to the upper end of the discharge port, one end of a hydraulic cylinder is rotatably connected to the opening / closing body, and the other end is rotatably connected to the bucket side.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view around a bucket, FIG. 2 is an overall view of a power shovel according to the present invention, and FIG. 3 is an explanatory view of its operation.

As shown in FIGS. 1 and 2, the bucket 1 is provided with a connecting plate 2 on the back surface thereof.
The swivel shaft 4 is fixed to the bucket 1 so as to project toward the opening 3 side of the bucket 1. The turning shaft 4 is supported by a rotary gear box 6 which is pivotally attached to the tip of an arm 14 of the power shovel A so as to be tiltable. As a result, if a normal operation is performed from the driver's seat 17 of the power shovel A, the bucket 1 can be freely tilted via the rotary gear box 6 and the bucket 1 can be freely rotated via the turning shaft 4. Can be turned.

On the back surface of the bucket 1, the connecting plate 2
A discharge port 7 is provided from below to the bottom.
One side of the opening / closing plate 8 is pivotally attached to the upper portion of the discharge port 7,
The opening / closing plate 8 can open and close the discharge port 7. The base ends of hydraulic cylinders 9 and 10 are rotatably connected to the other side of the opening / closing plate 8, and the tips of rods 9a and 10a of the hydraulic cylinders 9 and 10 are rotatably connected to the connecting plate 2. It is connected. The rotary gear box 6 is provided with a well-known pressure oil supply unit 11 provided with a hydraulic motor, a solenoid valve, etc. on its upper surface, and the hydraulic cylinders 9 and 10 are powered via the pressure oil supply unit 11. It is connected to a pressure oil tank 13 mounted on the main body 12 of the shovel A. Here, the pressure oil supply unit 11 is a battery 1 mounted on the main body 12 by a cable 16 arranged along the arm 14, boom 15, etc. of the power shovel A.
4 and the control switch 18 provided in the driver's seat 17. Accordingly, if the pressure oil supply unit 11 is controlled by closing or opening the control switch 18, the rods 9a and 10a of the hydraulic cylinders 9 and 10 can be sucked or extended to open and close the opening / closing plate 8.

Next, the operation of this embodiment will be described. First, open the control switch 18 provided in the driver's seat 17,
By extending the rods 9a and 10a of the hydraulic cylinders 9 and 10, the discharge port 7 of the bucket 1 is closed by the opening / closing plate 8 (FIG. 3 (a)). Then, by a normal operation, the bucket 1 is tilted via the rotary gear box 6, and the bucket 1 is swung via the swivel shaft 4, so that the opening 3 of the bucket 1 is moved to the main body 1 of the power shovel A.
In the direction of 2 (FIG. 3 (b)). Then, when the bucket 1 is lowered to the position of the earth and sand 19 and pulled toward the main body 12 as it is (arrow (a) in FIG. 3B), the earth and sand 19 can be excavated and scooped by the opening 3 of the bucket 1. In this case, since the discharge port 7 is provided in the lower portion of the back surface of the bucket 1, sufficient strength can be provided around the opening 3 of the bucket 1 (see FIG. 1), and as a result, the same bucket 1 Even when excavating the earth and sand 19 for a long time, the bucket 1 is not likely to be deformed or damaged. After scooping out the sand 19 as described above,
With the normal operation, face the opening 3 of the bucket 1 upwards,
It is raised as it is (FIG. 3 (a)). Next, earth and sand 19
The excavator A is moved to a place where the bucket should be transported, and the bucket 1 is lowered by a normal operation. In this state, the control switch 18 is closed to suck the rods 9a and 10a of the hydraulic cylinders 9 and 10,
The outlet 7 of the bucket 1 is released. Then, bucket 1
The earth and sand 19 inside are discharged | emitted (FIG.3 (c)). in this case,
By providing the discharge port 7 only at the lower rear portion of the bucket 1, the vertical length of the opening / closing plate 8 is correspondingly shortened, and as a result, the entire rear surface of the bucket is opened to form the discharge port as in the conventional case. Compared with the case where the rods 9a and 10a of the hydraulic cylinders 9 and 10 are not moved so much, the opening / closing plate 8 can be opened at the same angle and the discharge port 7 sufficient to discharge the earth and sand 19 can be secured. Therefore, the sand 19 can be quickly discharged.

[0009]

[Effect of the Invention] Since the present invention is configured as described above,
It has the excellent effects described below. (1). The bucket can be tilted and swung freely,
Since the inclined surface is provided over the entire front surface of the bucket, slope cutting and sandblasting can be performed. (2). Since the discharge port is provided only on the lower part on the back side of the bucket, the length of the opening / closing plate is correspondingly shortened, and as a result, compared to the conventional case where the entire back surface of the bucket is opened to form the discharge port. , Even if the rod of the hydraulic cylinder is not moved so much, it is possible to open the opening / closing plate at the same angle and to secure a sufficient discharge port for discharging the earth and sand, etc., so that the earth and sand can be discharged quickly. . (3). An outlet is provided in the lower portion on the back side of the bucket, one side of the opening / closing body is pivotally attached to the upper end of the outlet, one end of the hydraulic cylinder is rotatably connected to the opening / closing body, and the other end is on the bucket side. Since it is rotatably connected to the bucket, sufficient strength can be provided around the opening of the bucket, and as a result, the bucket will not deform even when excavating earth and sand for a long period of time with the same bucket. There is no risk of damage or damage.

[Brief description of drawings]

FIG. 1 is a perspective view around a bucket.

FIG. 2 is an overall view of a power shovel according to the present invention.

FIG. 3 is an explanatory view of the operation of the power shovel according to the present invention.

FIG. 4 is a perspective view showing a conventional technique.

[Explanation of symbols]

 A power shovel 1 bucket 7 discharge port 8 opening / closing plate 9 hydraulic cylinder 9a rod 10 hydraulic cylinder 10a rod 11 pressure oil supply section 13 pressure oil tank 14 battery 18 control switch

Claims (1)

[Scope of utility model registration request] 1. A boom pivotally attached to a main body and held down by a boom cylinder, an arm pivotally attached to the tip of the boom and swung by an arm cylinder, and a bucket pivotably attached to the tip of the arm. A power shovel comprising a bucket tilted by a cylinder, wherein the bucket is tiltably and swingably provided, and
An inclined surface is provided over the entire surface side , a discharge port is provided in the lower portion on the back side , one side of the opening / closing body is pivotally attached to the upper end of the discharge port, and one end of the hydraulic cylinder is attached. A power shovel, which is rotatably connected to the opening / closing body and is rotatably connected to the bucket side at the other end.