JP2591378Y2 - Work machine angle detection sensor mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of an angle detection sensor for detecting the relative swing angle of a working machine of a working machine such as a hydraulic excavator.

[0002]

2. Description of the Related Art FIG. 4 is a side view of a working machine of a conventional hydraulic power shovel, and FIG. 5 is a plan view. An arm 2 is pivotally mounted on a tip end of the boom 1 by a pin 3 so as to be rotatable, and is operated by an arm cylinder 4. 5 is a bucket and 6 is a bucket cylinder. An angle detection sensor 40 is mounted on the arm 2 to detect a relative swing angle between the boom 1 and the arm 2, and a lever 46 of the angle detection sensor 40 and the boom 1 are connected by a link 47.

FIG. 6 is a sectional view of an angle detection sensor 40. An angle sensor 42 is mounted on a case 41 and fastened to the outer surface of the arm 2 with bolts 43. A shaft 44 is mounted on the case 41, and one end of the shaft 41 is
5 and a lever 46 is attached to the other end. When the arm 2 swings with respect to the boom 1, the shaft 44 of the angle detection sensor 40 rotates via the link 47, and rotates the angle sensor 42 to detect the swing angle.

[0004]

However, according to the above configuration, since the angle detection sensor 40 is mounted on the outer surface of the arm 2, it may come into contact with an obstacle during work and may be damaged. For example, when excavating the inside of the sheet pile 50 as shown in FIG.
There is a problem that the portion contacts the sheet pile 50 and is broken.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an angle detection sensor mounting structure for a working machine which is not likely to come into contact with or break an external obstacle during work or the like. .

[0006]

In order to achieve the above object, a first device for mounting an angle detection sensor of a working machine according to the present invention is provided.
Are a first member and a second member which are sequentially rotatably connected to the vehicle body.
Relative rotation angle between the working machine made of a member and the first and second members
Angle detection of a work machine equipped with an angle detection sensor for detecting an angle
In the sensor mounting structure, between the left and right side walls of the second member
A hole passing therethrough, and inserted into said hole and
And a pipe whose outer periphery is fixed to the left and right side walls of the second member.
Having a relative rotation angle between the first and second members of the first and second members.
Angle detected via link mechanism provided between outer walls of members
The detection sensor body is housed in the pipe.
It is. The second invention is the same as the first invention, except that
The body of the angle detection sensor is detachably stored in the pipe
The configuration is as follows.

[0007]

According to the structure of the first invention, the second member is
The second part is inserted into a hole that penetrates between the right and left side walls.
Angle detection sensors are attached to pipes whose outer periphery is fixed to the left and right side walls of the material.
Since the sensor body is housed, the angle detection sensor is
Does not protrude outside of the
No risk of contacting the angle detection sensor with external obstacles
In addition, the strength of the second member can be improved. In addition, the second device
According to the configuration, the angle sensor body can be detachably attached to the pipe.
Since it is stored, assemblability is improved.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a structure for mounting an angle detection sensor of a working machine according to the present invention. FIG. 1 is a side view of a connecting portion between a boom 1 as a first member and an arm 2 as a second member of a working machine of a hydraulic excavator, and FIG. 2 is a plan view. Arm 2 at the end of boom 1
Are rotatably mounted on a pin 3. 4 is Ah
It is a non-cylinder. The lever 24 of the angle detection sensor 10 mounted on the arm 2 and the bracket 25 mounted on the boom 1 are connected by a link 26.

FIG. 3 shows a cross section taken along line AA of FIG.
Is welded in a state where a pipe 7 as a cylindrical member penetrates therethrough, and an annular seat 8 is welded around the pipe 7. A potentiometer 12 and an encoder 13 are attached to a case 11 of the angle detection sensor 10 in a connected state. A lid 20 having a boss 21 is fastened to the annular seat 8 on one side of the pipe 7 by a bolt 22, a plate 14 is fastened to the lid 20 by a bolt 15, and the plate 14 is provided with an angle detection sensor 10. The case 11 is fastened by bolts 16. A shaft 23 is fitted into the boss 21 of the lid 20, one end is connected to the rotating shaft 17 of the potentiometer 12, and the other end is connected to the lever 24.
Is attached and the bracket 25 is attached to the boom 1
Are connected via a link 26 by a pin 27. A lid 30 is fastened to the annular seat 8 on the other side of the pipe 7 by a bolt 22, and a wiring 3 from the potentiometer 12 and the encoder 13 is provided from the center of the lid 30.
1 has been removed. Therefore, the angle detection sensor 1
0 does not protrude from the side surface of the arm 2. When the arm 2 swings with respect to the boom 1, the shaft 23 rotates via the link 26, the potentiometer 12 converts the displacement into a voltage, and the encoder 13 converts the voltage into a pulse to detect the displacement angle.

[0010]

[Effects of the Invention] As described above, in the present invention, a pipe penetrating the arm of a hydraulic excavator is welded, an angle detection sensor is provided inside the pipe, and a lever attached to a shaft of the angle detection sensor taken out is provided. Since the arm and the boom are connected via the link, if the arm swings, the angle detection sensor rotates via the link and detects the swing angle. Further, since the angle detection sensor does not protrude to the outside of the arm, an angle detection sensor mounting structure of a working machine which is not likely to be damaged by contacting an external obstacle during operation or the like can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a working machine equipped with an angle detection sensor according to the present invention.

FIG. 2 is a plan view of the working machine equipped with the angle detection sensor of the present invention.

FIG. 3 is a cross-sectional view of the angle detection sensor mounting portion of the present invention.

FIG. 4 is a side view of a working machine equipped with a conventional angle detection sensor.

FIG. 5 is a plan view of a working machine equipped with a conventional angle detection sensor.

FIG. 6 is a sectional view of a conventional angle detection sensor mounting portion.

FIG. 7 is an explanatory diagram when a conventional angle detection sensor contacts an obstacle during work.

[Explanation of symbols]

1 Boom 23 Axis 2 Arm 24 Lever 7 Pipe 25 Bracket 10 Angle Detection Sensor 26 Link 11 Case 12 Potentiometer 13 Encoder 14 Plate 20, 30 Lid 21 Boss

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-173562 (JP, U) JP-A-2-45978 (JP-A-4-4213) Microfilm photographing the contents (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E02F 9/26 E02F 3/38 G01B 21/22

Claims (2)

(57) [Scope of request for utility model registration] 1. A first part which is sequentially rotatably connected to a vehicle body.
Work machine consisting of a material and a second member, and between the first and second members
Work machine provided with an angle detection sensor that detects a relative rotation angle
In the angle detection sensor mounting structure, the left side of the second member
A hole that passes through between the right sidewalls and
And an outer periphery fixed to left and right side walls of the second member.
Relative rotation angle between the first and second members.
Through a link mechanism provided between the outer walls of the first and second members.
The body of the angle detection sensor to be detected was stored in the pipe
An angle detection sensor mounting structure for a working machine. 2. The apparatus according to claim 1 , wherein the body of the angle detection sensor is connected to the pie
2. The storage device according to claim 1, wherein the storage device is detachably accommodated in the pump.
Mounting structure of the angle detection sensor of the work machine.