JPH078457U - Work machine angle detection sensor mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] The angle detection sensor that detects the relative swing angle of the arm of the hydraulic power shovel with respect to the boom
Avoid contact with and damage to obstacles. [Structure] Arm 2 pivotally attached to boom 1 by pin 3
A pipe 7 is welded across the pipe. The lid 20 having the boss 21 fastened to one side of the pipe 7 is fastened with the angle detection sensor 10 in which the potentiometer 12 and the encoder 13 are housed in the case 11.
Installed inside. A shaft 23 is fitted in the boss 21, one end is connected to the rotary shaft 17 of the potentiometer 12, and a lever 24 is fixed to the other end. A link 26 connects the lever 24 and the bracket 25 attached to the boom 1. When the arm 2 swings, the shaft 23 rotates via the link 26, and the swing angle is detected. Since the angle detection sensor 10 is provided inside the pipe 7, it does not come into contact with an external obstacle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure of an angle detection sensor for detecting a relative swing angle of a working machine such as a hydraulic power shovel.

[0002]

[Prior art]

 FIG. 4 is a side view of a conventional hydraulic power shovel working machine, and FIG. 5 is a plan view thereof. An arm 2 is rotatably attached to the tip of the boom 1 by a pin 3 and is operated by a boom cylinder 4. Reference numeral 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 cross-sectional view of the angle detection sensor 40. An angle sensor 42 is attached to the case 41 and is fastened to the outer surface of the arm 2 with a bolt 43. A shaft 44 is mounted on the case 41, one end of which is connected to the rotation shaft 45 of the angle sensor 42, and a lever 46 is mounted on 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 the angle sensor 42 is rotated to detect the swing angle.

[0004]

[Problems to be solved by the device]

 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 operation and be damaged. For example, when excavating the inside of the sheet pile 50 as shown in FIG. 7, when the portion in contact with the sheet pile 50 is tried to be excavated by the bucket 5, the angle detection sensor 40 is damaged because the portion B contacts the sheet pile 50. There is a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an angle detection sensor mounting structure for a working machine that is free from contact with or damage to an external obstacle during work or the like. .

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, in an angle detection sensor mounting structure for a working machine according to the present invention, a second member is rotatably attached to a first member via a coupling pin, and the angle detection sensor is attached to the second member. An angle detecting device for a working machine, wherein a second member is fixed and a relative swing angle of the second member with respect to the first member is detected through a link mechanism. However, the angle detection sensor is internally provided in the tubular member.

[0007]

[Action]

 According to the above configuration, the angle detection sensor for detecting the swing angle of the second member of the working machine with respect to the first member is attached to the cylindrical member that is fixed by traversing and penetrating the second member. Since it is provided, the angle detection sensor does not project to the outside of the second member. Therefore, there is no risk that the angle sensor will come into contact with an external obstacle during work or the like.

[0008]

【Example】

 An embodiment of an angle detection sensor mounting structure for a working machine according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a connecting portion between a boom that is a first member and an arm that is a second member of a working machine of a hydraulic power shovel, and FIG. 2 is a plan view. An arm 2 is rotatably attached to the end of the boom 1 by a pin 3. 4 is a boom 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 is a cross-sectional view taken along the line AA of FIG. 1, in which a pipe 7 which is a tubular member is welded to the arm 2 so as to penetrate therethrough, and an annular seat 8 is provided around the pipe 7. It is welded. A potentiometer 12 and an encoder 13 are attached to the case 11 of the angle detection sensor 10 in a connected state. A lid 20 having a boss 21 is fastened to an annular seat 8 on one side of the pipe 7 by a bolt 22, a plate 14 is fastened to the lid 20 with bolts 15, and an angle detection sensor is attached to the plate 14. A case 11 of 10 is fastened by a bolt 16. The shaft 23 is fitted into the boss 21 of the lid 20, one end of which is connected to the rotary shaft 17 of the potentiometer 12, and the other end of which is attached with a lever 24, which is different from the bracket 25 attached to the boom 1. They are connected by a pin 27 via a link 26. A lid 30 is fastened to the annular seat 8 on the other side of the pipe 7 with a bolt 22, and a wiring 31 from the potentiometer 12 and the encoder 13 is taken out from the center of the lid 30. Therefore, the angle detection sensor 10 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 a 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]

[Effect of device]

 As described above, according to the present invention, the pipe penetrating the arm of the hydraulic power shovel is welded, the angle detection sensor is internally provided in the pipe, and the lever attached to the shaft of the angle detection sensor taken out to the boom is linked. Since the arm is rocked, the angle detection sensor rotates via the link and detects the rocking angle. Further, since the angle detection sensor does not project to the outside of the arm, it is possible to obtain an angle detection sensor mounting structure for a working machine that is unlikely to be damaged by contact with an external obstacle during work or the like.

[Brief description of drawings]

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

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

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

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

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

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

FIG. 7 is an explanatory diagram when a conventional angle detection sensor comes into contact with 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

Claims (1)

[Scope of utility model registration request] 1. A second member is rotatably attached to a first member via a coupling pin, an angle detection sensor is fixed to the second member, and a relative swing angle of the second member with respect to the first member is determined. In the angle detection device for a working machine, which is configured to perform detection through a link mechanism, a tubular member that traverses and penetrates the second member is fixed, and the angle detection sensor is internally provided in the tubular member. The characteristic angle detection sensor mounting structure for work equipment.