JPH03208920A - Bucket with detector of quantity of earth - Google Patents

Abstract

PURPOSE:To enable a grasp of a quantity of earth in a bucket and to make it possible to efficiently excavate by providing a detection plate which pivots in accordance with a quantity of earth in the bucket to the bucket of a construction machinery, and detecting a quantity of the pivoting plate. CONSTITUTION:A notch hole 3 is provided to the upper part of a bucket 1, and a detection plate 4 is inserted and fixed to a bracket 2 through a support pine 8. The detection plate 4 is pivoted in accordance with a quantity of earth coming into a bucket 1, and the support pin 8 is so constructed that it turns together with the detection plate. After that, the body section of a potentiometer 7 is fixed to a bracket 2, and a rotary section thereof is mounted to the support pin 8. In addition, proper reaction force is given to the detection plate 4 by a spring 5, and the detection plate 4 is turned back to the initial position in the event the earth in the bucket 1 is discharged. According to the constitution, a quantity of earth coming into the bucket 1 can be displayed by the potentiometer 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bucket that is installed in a construction machine such as a hydraulic excavator or a bucket wheel loader and has a device for detecting the amount of soil in the bucket.

[Conventional technology] There is no technology of this kind in the past, and the amount of soil in the bucket is grasped intuitively based on the operator's experience and intuition.

[Problems to be Solved by the Invention] FIG. 5 shows an example of a conventional hydraulic excavator. In FIG. Stick cylinder 11. By operating the bucket cylinders 12 in combination, the bucket 1 is operated and excavated.
Carry out work such as loading. Operators usually use bucket 1
While observing the movement of the bucket, the operator constantly monitors how much dirt is in the bucket and when to involve bucket 1 and start the lifting operation, thereby ensuring efficient operation by scooping up as much dirt as possible. However, as the excavation depth increases, the area in front of cab 9 becomes a blind spot, making it difficult to see the movement of bucket 1, and the operator uses experience and intuition to determine when bucket 1 is full of soil. Start lifting bucket 1. At this time,
There are problems such as continuing to excavate even when the soil is full, consuming unnecessary hydraulic energy, or starting lifting operations when there is little soil, resulting in inefficient operation. This tendency is particularly noticeable when Baquerato 1 cannot be seen at all, such as when excavating a riverbed. The present invention aims to provide a bucket that solves these problems.

[Means for Solving the Problems] A bucket with a soil amount detection device according to the present invention is a bucket for a construction machine, and has a detection plate provided with a cutout hole in the upper part of the bucket and rotates according to the amount of soil flowing into the bucket. 4
and means for detecting the rotation amount of the detection plate 4, and means for applying an appropriate reaction force to the detection plate 4 and returning the detection plate to its original position based on the rotation amount at the time of evacuation. Features.

[Function] By connecting a potentiometer to the support bin of the detection plate that rotates as the earth and sand moves, the support bin rotates, so rotational displacement can be replaced by a resistance change due to the potentiometer, so this resistance change must be monitored. The amount of earth and sand in the bucket can be easily detected. If a limit switch or a proximity switch is used as a means for detecting the amount of rotation of the detection plate, the amount of soil can be detected by monitoring the on/off state of its contacts.

[Example] Examples of the present invention are shown in FIGS. 1 to 4.

FIG. 1 shows a perspective view of a bucket according to an embodiment of the invention. In FIG. 1, a notch hole 3 is provided in the upper center of a conventional bucket 1, a detection plate 4 is inserted therein, and the bucket is fixed to a bracket 2 via a support bin 8 as shown in FIG. Brackets 2 are provided on both sides and are designated 2a and 2b, respectively.

The support bin 8 and the detection plate 4 are fixed with screws, etc., and the detection plate 4 is
Create a structure that rotates in response to the rotation of the The main body part of the potentiometer tube is fixed to the bracket 2a, and the rotating part is fixed to the support bin 8. As shown in FIG. 2, the spring 5 is used to return the detection plate 8 to its initial position and to apply an appropriate reaction force, and is fixed to the bucket 1 with a spring support 6a. Since the rotation range of the detection plate 4 depends on the length of the notch hole 3, it is set to a required length according to the size of the bucket 1.

In Fig. 2, when earth and sand enters during excavation, the length of the sensing plate 4 is adjusted so that the amount of earth is, for example, about 20% of the bucket capacity immediately before the earth and sand hits the initial position of the sensing plate 4. Once set, the detection plate 4 will rotate in the direction of ■ as excavation progresses.

As the detection plate 4 rotates, the support bin 8 shown in FIG. 3 also rotates in the same way, and the rotation axis of the potentiometer 7 fixed to the support bin 8 also rotates, so that the output of the potentiometer changes as shown in FIG. Changes in a certain relationship with quantity. In FIG. 4, it is shown as a straight line. Since the detection plate 4 has a structure in which it contacts the notch hole at 100% at the 0 point and does not move any further, the output of the potentiometer remains constant at 100% when the amount of stacking is high. If you want a signal with a certain fixed capacity, use a limit switch, proximity switch, etc.

[Effects of the Invention] As described above, the present invention provides the following effects because the soil volume detection plate and detectors such as a potentiometer and a limit switch are installed in the bucket.

(1) When an operator performs excavation work where the bucket cannot be seen, it is possible to eliminate unnecessary energy loss and inefficient excavation such as only collecting a small amount.

(2) It can be used as an excavated soil volume detector for automatic operation.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a bucket with a soil amount detection device according to an embodiment of the present invention, FIG.
4 is an output diagram of a detector according to an embodiment of the bucket of the present invention, and FIG. 5 is an overall view of a conventional hydraulic excavator. DESCRIPTION OF SYMBOLS 1... Bucket, 2... Bracket (including 2a, 2b), 3... Notch hole, 4... Detection plate, 5... Spring, 6... Spring bracket, 7... Potentiometer, 8... Support bin, 9... Cab, 10... Boom cylinder, 11. ...Stick cylinder, 12...Bucket cylinder. Tagani's agent Patent attorney Suzue Takehiko Procedural amendment filing average Heisei & 5.10 days

Claims (1)

[Claims] A bucket for construction machinery includes: a detection plate (4) having a notch in the upper part of the bucket and rotating according to the amount of earth and sand flowing into the bucket; a means for detecting the amount of rotation of the detection plate (4); and the detection plate (4). A bucket with an earth amount detection device, characterized in that it is equipped with means for applying an appropriate reaction force to the plate (4) and returning the plate (4) to its original position based on the amount of rotation of the detection plate at the time of evacuation.