JPS5931804Y2 - Turning angle detection device for rotating body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting the turning angle of a construction vehicle having a revolving body.

When automating work on a construction vehicle having a revolving structure, it is necessary to detect and control the turning angle of the revolving structure.

Furthermore, when working in urban areas, it may be necessary to limit the turning angle of the revolving body.

The present invention is a device for detecting the rotation angle of the rotating body in such a case.

Conventional turning angle detection devices for this type of rotating structure have been designed to determine the turning angle by detecting the rotation angle of the rotating motor that turns the rotating structure. It was impossible to install it later because the means for installing it had to be considered.

The present invention has been made in consideration of the above-mentioned circumstances, and it is an object of the present invention to provide a turning angle detection device for a rotating body that has a simple configuration and can be easily installed later on a construction vehicle having a ready-made rotating body. It is something to do.

The configuration will be explained below based on the embodiment shown in the drawings.

Figure 1 shows the main body of a construction vehicle with a revolving body. This main body consists of a traveling body 1 and a revolving body 2, both of which can swing around a swing circle 3 fixed to the traveling body 1. It is connected to.

A gear is cut into the inner ring of the swing circle 3, and a pinion 4a rotated by a swing hydraulic motor 4 provided on the swinging body 2 meshes with the gear, and the rotation of this gear causes the swinging structure 2 to move against the traveling body 1. It makes a turning movement.

The traveling body 1 travels by rotating a sprocket 6 with a traveling hydraulic motor 5.

Pressure oil for the hydraulic motor 5 for traveling is supplied via a swivel joint 9 from a hydraulic pump 8 driven by an engine 7, similar to that for swivel.

The swing joint 9 is located at the center of rotation of the revolving body 2 and is provided on the side of the traveling body 1, the details of which are shown in FIG. The body 9b is rotated via a link 12 by a revolving frame 11 of the revolving structure 2.

The body 9b of the swivel joint 9 has a pipe 9C connected to the hydraulic pump 8 and the tank, and the shaft 9a has a pipe 9d connected to the hydraulic pump 5 for traveling, and these pipes 9C and 9d are connected to each other. A passage 9e is provided.

Additionally, drain elbows 13 and 14 are provided at the top and bottom of the swivel joint 9 to communicate with each other.

The elbow 14 on the shaft side fixed to the lower end of the shaft 9a is modified and the boss 15 is attached to the main body 16 of the elbow 14 together with an O-ring.

A rod 17 passing upward through the swivel joint 9 is screwed to the boss 15 and fixed with a nut 18.

The rod 17 passes through a retainer 19 provided at the elbow 13 on the body side.

A lever 20 is fixed to the tip of the rod 17 with a screw 21.

On the other hand, a sheet 22 is fixed to the polping frame 11, a bracket 23 is attached to this, and a potentiometer 24 is attached to the tip of this bracket 23.

A lever 26 is attached to the shaft 25 of the potentiometer 24 with a screw 2.
It is fixed at 7.

A groove 28 is provided at the tip of this lever 26 in a direction perpendicular to the axis.
A pin 29 protruding from the tip of the lever 20 of the rod 17 is fitted into the groove 28 of the lever 26.

When the rotating body 2 turns with respect to the traveling body 1, a deviation occurs between the rod 17 and the potentiometer 24 in the turning direction, and the potentiometer 24 is rotated by the amount of this deviation to detect the turning angle of the rotating structure 2. Ru.

The present invention is as described above, and has a revolving body 2 that rotates with respect to the traveling body 1, and a shaft portion 9a fixed at the center of rotation on the traveling body 1 side, coupled to the rotating body 2 side, and the above-mentioned Shaft part 9a
It has a swivel joint 9 consisting of a body 9b fitted to the swivel joint 9, and a drain hole is provided at the center of rotation of the shank 9a and body 9b of the swivel joint 9, and the upper and lower ends of the swivel joint 9 are connected to the body 9b and the shaft 9a. In a construction vehicle closed by an elbow 13.14 fixed to the axial center of the swivel joint 9,
A rod 17 is erected and protrudes upward through the upper elbow 14 whose lower end is fixed to the shaft portion 9a side and whose upper portion is fixed to the body 9b side. A potentiometer 24 is attached to the shaft 25 of the potentiometer 24 and a lever 26 having a groove 28 in the direction perpendicular to the axis is fixed to one of the shaft 25 of the potentiometer 24 and the rod 17,
On the other hand, a lever 20 having a protruding pin 29 at its tip is fixed, and the shaft 25 of the potentiometer 24 and the rod 17 are connected by engaging the pin 29 with the groove 28 of both levers 20.26. Because of the structure, the structure is simple and it can be easily installed later on a construction vehicle having a ready-made revolving body.

Further, according to the present invention, even if the shaft centers of the shaft 25 of the potentiometer 24 and the rod 17 are slightly shifted from each other, the two shaft portions can be connected in the rotational direction without any problem.

Further, according to the present invention, the rod 17 that drives the potentiometer 24 is fixed at its lower end to the lower elbow 14 fixed to the shaft portion 9a side, and the upper elbow 14 whose upper end is fixed to the body 9b side. By penetrating through the swivel joint 9, the drain elbows 13 and 14 at the upper and lower ends of the swivel joint 9 can operate without impairing the function of the slave side.
can support the rod 17 with only minor modification,
Furthermore, since this modification requires only both elbows 13 and 14, processing is easy and inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a construction vehicle with a general revolving body, Fig. 2 is a sectional view showing the main parts of the present invention, and Fig. 3 is a joint connecting a rod and a potentiometer. FIG. 4 is a side view thereof. 1 is a running body, 2 is a rotating body, 9 is a swing joint, 9a is a shaft portion,
9b is a body, 17 is a rod, 24 is a potentiometer, and 25 is a shaft.

Claims (1)

[Scope of utility model registration request] It has a rotating body 2 that rotates with respect to the traveling body 1, and a shaft portion 9a fixed at the turning center of the traveling body 1 side, and a body 9b that is connected to the rotating body 2 side and fitted to the shaft portion 9a. It has a swivel joint 9, and further has a drain hole at the pivot center of the shaft portion 9a and body 9b of the swivel joint 9,
In a construction vehicle whose upper and lower ends are closed by elbows 13.14 fixed to the body 9b and the shaft center of the shaft portion 9a, the lower end is fixed to the pivot center of the swivel joint 9 and the lower end is fixed to the shaft portion 9a side. A rod 17 is fixed to the upper elbow 14 and protrudes upwardly through the upper elbow 14 whose upper part is fixed to the body 9b side, and a potentiometer 24 is attached to the rotating body 2 side, and the shaft of this potentiometer 24 25 and the rod 17, a groove 28 is provided at the tip in the direction perpendicular to the axis.
A lever 26 with a pin 29 protruding from its tip is fixed on the other side, and both levers 2
A turning angle detection device for a rotating body, characterized in that a shaft 25 of a potentiometer 24 and a rod 17 are connected by engaging a groove 28 of 0.26 mm and a pin 29.