JPH0620543U - Power shovel - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a power shovel that has durability and can perform efficient work. [Structure] A discharge port 7 is provided on the back surface of the bucket 1 from below the connecting plate 2 to the bottom. One side of the opening / closing plate 8 is pivotally attached to the upper portion of the discharge port 7. A base end of a hydraulic cylinder 10 is rotatably connected to the other side of the opening / closing plate 8, and a tip of a rod 10a of the hydraulic cylinder 10 is rotatably connected to the connecting plate 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a power shovel, and more particularly to a bucket structure.

[0002]

[Prior art]

 Conventionally, as this type of power shovel, the following structure is known. That is, as shown in FIG. 4, a bucket 21 is attached to the front end 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 adapted to be opened and closed by an opening / closing body 23 pivotally attached to the upper part thereof. Then, with the opening / closing body 23 closed, earth and sand are excavated and scooped by the opening 24 of the bucket 21, and the opening / closing body 23 is opened to discharge the earth and sand and the like 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]

[Problems to be solved by the device]

 However, in the conventional bucket 21, the entire back surface 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. When excavating earth and sand for a long period of time, the bucket 21 may be deformed or damaged. In addition, 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 of the bucket 21, so that in order to secure the sufficient discharge port 22 to discharge the earth and sand, etc. It is necessary to move the rod 25a of the hydraulic cylinder 25 considerably to open the opening / closing body 23, and as a result, there is a problem that the earth and sand cannot be discharged quickly. SUMMARY OF THE INVENTION 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]

[Means for Solving the Problems]

 For this reason, in the present invention, a boom pivotally attached to the main body and lifted up by the boom cylinder, an arm pivotally attached to the tip of the boom and swung by an arm cylinder, and pivotally attached to the tip of the arm. And a bucket that is tilted by a bucket cylinder, in which a discharge port is provided in the lower rear portion of the bucket, 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 rotatably connected to the opening / closing body, and the other end is rotatably connected to the bucket side.

[0005]

【Example】

 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 operation explanatory view thereof.

As shown in FIG. 1 and FIG. 2, the bucket 1 is provided with a connecting plate 2 on the back surface thereof, and the connecting plate 2 has a swivel shaft 4 protruding toward the opening 3 side of the bucket 1. It is fixed. The swing 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 in a tilted manner. 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 to.

A discharge port 7 is provided on the back surface of the bucket 1 from below the connecting plate 2 to the bottom. One side of the opening / closing plate 8 is pivotally attached to the upper portion of the discharge port 7, and 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. Are connected to. The rotary gear box 6 is provided with a well-known pressure oil supply unit 11 having a hydraulic motor, an electromagnetic valve, etc. on its upper surface, and the hydraulic cylinders 9 and 10 are connected via the pressure oil supply unit 11. It is connected to a pressure oil tank 13 mounted on the main body 12 of the power shovel A. Here, the pressure oil supply unit 11 includes a battery 16 mounted on the main body 12 and a control switch 18 provided on the driver's seat 17 by a cable 16 arranged along the arm 14, the boom 15 and the like of the power shovel A. It is connected to the. 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, the control switch 18 provided in the driver's seat 17 is opened to extend the rods 9a and 10a of the hydraulic cylinders 9 and 10 to close the discharge port 7 of the bucket 1 with the opening / closing plate 8 (see FIG. 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 directed toward the main body 12 of the power shovel A. (Fig. 3 (b)). Then, when the bucket 1 is lowered to the position of the earth and sand 19 and is 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 rear portion 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 can be obtained. Even if excavating the sand 19 for a long period of time with No. 1, there is no fear that the bucket 1 will be deformed or damaged. After the soil 19 has been scooped out as described above, the opening 3 of the bucket 1 is directed upward by a normal operation and then raised as it is (FIG. 3 (a)). Next, the power shovel A is moved to a place where the earth and sand 19 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 to open the discharge port 7 of the bucket 1. Then, the earth and sand 19 in the bucket 1 is discharged | emitted (FIG.3 (c)). In this case, since the discharge port 7 is provided only on the lower portion of the back surface of the bucket 1, the vertical length of the opening / closing plate 8 is correspondingly shortened, and as a result, the entire back surface of the bucket is opened as in the conventional case. As compared with the case where the discharge port is formed by opening the discharge port 7 sufficiently, it is possible to open the opening / closing plate 8 at the same angle and discharge the earth and sand 19 without moving the rods 9a, 10a of the hydraulic cylinders 9, 10 so much. Therefore, the earth and sand 19 can be quickly discharged.

[0009]

[Effect of device]

 As described above, according to the present invention, the boom pivotally attached to the main body and raised by the boom cylinder, the arm pivotally attached to the tip of the boom and swung by the arm cylinder, and the arm attached to the tip of the arm. In a power shovel comprising a bucket mounted and tilted by a bucket cylinder, a discharge port is provided at a lower rear portion of the bucket, and one side of the opening / closing body is pivotally attached to an upper end of the discharge port. One end of the hydraulic cylinder is rotatably connected to the opening / closing body and the other end is rotatably connected to the bucket side, so that sufficient strength is provided around the opening of the bucket. Therefore, even if excavating earth and sand in the same bucket for a long period of time, there is no danger that the bucket will be deformed or damaged. Also, by providing the discharge port only on the lower part of the back surface of the bucket, the vertical length of the opening / closing plate is correspondingly shortened, and as a result, the entire back surface of the bucket is opened to form the discharge outlet as in the conventional case. Compared with the case, it is possible to open the opening and closing plate at the same angle and secure a sufficient discharge port for discharging sediment, without moving the rod of the hydraulic cylinder so much. It has the excellent effect that it can be done.

[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 which is pivotally attached to a main body and which is elevated by a boom cylinder, an arm which is pivotally attached to the tip of the boom and swings by an arm cylinder, and a bucket cylinder which is pivotally attached to the tip of the arm. In a power shovel comprising a bucket tilted by
A discharge port is provided in the lower rear portion of the bucket, 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 on the bucket side. A power shovel characterized by being rotatably connected.