JPS6030510Y2 - Rotary shaft drive device - Google Patents

Description

[Detailed description of the invention] This invention is based on an AZ (A
The present invention relates to a rotary shaft drive device that rotationally drives a shaft with a drive device that extends and contracts the shaft.

What has been conventionally considered as this type of rotary shaft drive device will be explained with reference to FIGS. 1 to 3.

Figure 1 shows its constituent countries, and Figures 2 and 3 show its constituent countries.
They are a sectional view taken along ■-■ and a sectional view taken along ■-■ of the figure.

In the figure, reference numeral 1 denotes an antenna reflector, which is rotatably supported around an EL (elevation) shaft 2 by a pair of supporting arms 1a and lb fixed to the back surface and a seat bearing 2a made of Teflon or the like.

3 is an EL axis drive device consisting of a hydraulic cylinder, an electric jack, etc. that rotates the antenna reflector 1 around the EL axis 2, and 4 is an EL axis 2 that supports the antenna reflector 1 and the E mentioned above.
This is an AZ (Azimath) shaft that supports the L-axis drive device 3, and is composed of an EL shaft mounting part 4a, the above-mentioned shaft part 4b, an intermediate part 4c, and a lower shaft part 4d. They are connected by fixing the parts with bolts 4e.

5 is a support rod, one end is fixed to the ground and the other end is M
A seat bearing 5 made of Teflon or the like is attached to the upper shaft portion 4b of the shaft 4.
The bearing 5a is rotatably supported via the bearing 5a.

6 is an AZ bearing fixed on the ground, bearing 6a
The lower shaft portion 4d of the AZ shaft 4 is rotatably supported through the shaft.

? A fan-shaped arm 8 is fixed to the flange of the lower shaft portion 4d of the AZ axis 4 by welding or the like, and 8 is an M drive device such as a hydraulic cylinder or an electric jack. A mounting hole 7a has one end rotatably attached to the arm 7 by a pin 8c and the other end provided on the outer periphery of the arm 7.
The cylinder 8b is rotatably attached to a joint 9 fixed by a bolt 7b to the cylinder 8b by a pin 8c.

In such a configuration, when rotating the M-axis 4 counterclockwise or clockwise around the axis by a certain angle range, the cylinder 8b can be expanded or contracted, but when the M-axis 4 is rotated by more than the above-mentioned certain angle, the cylinder 8b can be expanded or contracted. After stretching or contracting it as much as possible and rotating it at the above-mentioned constant angle in the predetermined direction, remove the bolt 1b, hold the cylinder 8b with your hand so as not to apply a large force to the connection part of the cylinder 8b with the support base 8a, The cylinder 8b is operated in the opposite direction from the previous time until the joint 9 fits into the adjacent mounting hole 7a, and the joint 9 is fixed with the bolt 7b.

Then, by repeating the process of making the AZ drive device 8 again, the M-axis 4 rotates around the axis beyond the above-mentioned predetermined angle range.

Although the rotary shaft 4 rotates in this way, if it is rotated beyond a certain angle range, the AZ-axis drive device 8, which is a heavy object, must be supported by a person, which has the drawback of poor work efficiency and a long time. Ta.

This idea was created in consideration of these points, and A.
To provide a rotary shaft drive device capable of rotating a rotary shaft over a certain angle range without the need for a person to support the Z drive device.

An embodiment of this invention shown in FIGS. 4 and 5 will be described below.

FIG. 5 is a sectional view taken along the line -■ in FIG. 4.

In the figures, the same reference numerals as in FIGS. 1 to 3 indicate the same or corresponding parts.

A support ring 10 is inserted into the lower shaft portion 4d to maintain the position of the bearing 6a and support the arm 11. The arm 11 is rotatably supported around the lower shaft portion 4d by a seat bearing 12. Bolt insertion holes 13 are provided at equal intervals on the same circumference in the flange of the arm 11, and bolt insertion holes 14 are provided in the arm 11 at the same radius as the bolt insertion holes 13 from the center of the lower shaft portion 4d. Insertion hole 13
．． The arm 11 is fixed to the lower shaft portion 4d by a bolt 15 passing through the arm 14, and rotates together with the AZ axis 4 around the M axis.

In such a configuration, when the AZ axis 4 supporting the antenna reflector 1 is rotated within a certain angle range, the arm 1 is rotated by operating the AZ drive device 3 and expanding and contracting the cylinder 8b.
1 receives a rotational force around A4d14, and the M-axis 4 fixed to this arm 11 rotates within a certain angle range counterclockwise or clockwise to track, for example, a geostationary satellite located in the upper left part in FIG. If you want to track a new geostationary satellite on the opposite side of this geostationary satellite, that is, rotate the antenna reflector 1 beyond the above-mentioned fixed angle range, in this case rotate it 180 degrees repeatedly at that azimuth position, and then rotate it within the fixed angle range above. When tracking a satellite, first drive the AZ drive device 8 to extend or contract the cylinder 3b as much as possible, rotate the AZ axis 4 counterclockwise or clockwise, then remove the bolt 15 and rotate the cylinder 3b in the opposite direction from the previous time. Rotate in the direction.

At this time, the cylinder 3b is supported by the arm 11.

In this state, the arm 11 is fixed to the AZ axis 4 and the AZi
By repeating the process of operating the M drive device 8, the AZ axis 4 is rotated 180 degrees around the axis.

In addition, in the above, the M axis 4 supporting the antenna reflector 1
Although the rotary drive has been described above, this is not limited to this, and the use may be made, for example, of a turning table of a transporter or a construction machine.

As described above, according to this invention, the rotary shaft can be rotated over a certain angle range without supporting the M drive device by hand, and has advantages such as improved workability compared to the conventional one.

[Brief explanation of the drawing]

Figure 1 shows the configuration of a conventional rotary shaft drive device, Figure 2 is a cross-sectional view taken along ■-■ in Figure 1, Figure 3 is a cross-sectional view taken along ■-■ in Figure 1, and Figure 4 is a cross-sectional view of this invention. A sectional view showing one embodiment, FIG. 5 is a sectional view taken along the line -■ in FIG. 4. In the figure, 4 is an AZ axis, 6 is an AZ axis bearing 6a, 8 is a drive device, 11 is an arm, and 15 is a bolt. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A rotating shaft 4 is rotatably provided on the base body 6, an arm 11 is rotatably attached to the rotating shaft 4, and both ends of the arm 11 and the support base 8a are rotatably attached. A telescopic drive device 8b, a means 15 for fixing the arm 11 to the rotation shaft 4, and a support ring 10 for supporting the arm 11 are provided, and the rotation shaft 4 can be rotated within a certain angle range by extension and contraction of the drive device 8b. , characterized in that the rotation shaft 4 is rotated over the predetermined angle range by fixing by the means 15, releasing the fix while supporting the arm 11 with the support ring 10, and expanding and contracting the drive device 8b. Rotary shaft drive device.