JPH0744869U - Parabolic antenna bearing - Google Patents

Abstract

(57) [Abstract] [Purpose] In the bearing used for the parabolic antenna,
(EN) Provided at low cost, a bearing having a mechanism for narrowing a gap between a shaft and a bearing as much as possible. A parabolic antenna bearing including a main reflecting mirror side bearing portion 2 rotatably attached to a pedestal side bearing portion 1 which is a fulcrum of a reflecting mirror driven by an elevation jack. Axis 3
Two blocks 4A, 4B inserted between the housing part 11 for supporting the bottom plate part 12 of the main reflecting mirror side bearing part 2
And a bolt 7 for fastening the two blocks to each other in a wedge shape with an appropriate force to narrow the gap between the shaft 3 and the pedestal side bearing portion 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bearing for a parabolic antenna used for satellite communication.

[0002]

[Prior art]

 As shown in the general configuration diagram of FIG. 3, a conventional antenna used for satellite communication has a pedestal portion 13 and a main reflecting mirror portion 14 and a sub-reflecting mirror portion via a bearing body 17 described later in the pedestal portion 13. The unit 15 is mounted. The direction of the main reflecting mirror portion 14 is adjusted by an EL (elevation) jack 16 for elevation adjustment with the bearing body 17 as an axis. On the other hand, when this antenna is used for high frequencies above the KU band and is a parabolic antenna with a large or medium diameter, the radio wave directivity is very sharp, so the backlash of the bearing jack and EL jack 16 is minimized. It must be narrowed so that it does not rattle when adjusting the direction of the antenna. As shown in FIG. 2, a bearing main body 17 used for a bearing portion of a conventional parabolic antenna of this kind has a shaft 10 having a taper end portion and a shaft side sliding portion in the central portion of the shaft 10 which is tapered. The side sliding member 5 is provided, and the fitting taper sleeve 9 is pushed in to eliminate the gap between the shaft and the pedestal side and the main reflecting mirror side bearings 1 and 2 to prevent rattling. .

[0003]

[Problems to be solved by the device]

 This conventional parabolic antenna bearing can eliminate the gap between the shaft and the pedestal bearing on the fixed side, but in order to reduce the gap between the shaft and the bearing on the main reflecting mirror on the rotating side, There is no choice but to rely on the machining dimensional accuracy, and there is the drawback that it becomes a very expensive bearing including the machining of the tapered shaft.

[0004]

[Means for Solving the Problems]

 The parabolic antenna bearing of the present invention is a parabolic antenna bearing having a main reflecting mirror side bearing portion rotatably attached to a pedestal side bearing portion serving as a fulcrum of a reflecting mirror driven by an elevation jack. Two blocks inserted between the housing that supports the shaft of the bearing and the bottom plate of the main reflector side bearing, and bolts that tighten the two blocks in a wedge shape with appropriate force. And have.

[0005]

【Example】

 Next, the present invention will be described with reference to the drawings. FIG. 1 (a) is a structural view of a bearing body (see FIG. 3) which is a main part of an embodiment of the present invention, and FIG. 1 (b) is a vertical sectional view of FIG. 1 (a). In the embodiment shown in FIGS. 1A and 1B, the pedestal side bearing portion 1 and the main mirror side bearing portion 2 are connected by a shaft 3 and rotate about the shaft 3. The pedestal-side bearing portion 1 supports the central portion of the shaft 3 with the housing portion 11, and the bearing portion 2 supports both sides of the shaft 3. Here, the two blocks 4A and 4B inserted in a wedge shape are inserted into the space formed by the housing portion 11 of the pedestal side bearing portion 1 and the bottom plate portion 12 of the main reflecting mirror side bearing portion 2 and tightened. By tightening the blocks 4A and 4B with the bolt 7, the space between the housing portion 11 and the bottom plate portion 12 is expanded, and the housing portion 11 pushes down the shaft 3 so that the wedge side sliding member 6 is interposed. The gap between the shaft 3 and the bearing portion 1 can be reduced. Further, since the sliding member 6 attached to the concave portions of the blocks 4A and 4B is in contact with the outer peripheral portion of the housing portion 11 and has a circular shape, it does not hinder the rotation of the bearing portion. The bearing portion 17 of the parabolic antenna of the present invention can be implemented in the EL jack tip portion as shown in FIG.

[0006]

[Effect of device]

 As described above, according to the present invention, the block is inserted like a wedge between the housing part of the pedestal side bearing part and the main reflector side bearing part, and tightened with bolts, so that the bearing part can be simply added. There is an effect that can reduce the gap.

[Brief description of drawings]

1 is a block diagram of an embodiment of the present invention (a), and FIG.
It is an AA sectional view of (a).

FIG. 2 is a configuration diagram of a bearing portion of a conventional parabolic antenna.

FIG. 3 is an overall configuration diagram including a bearing portion of a general parabolic antenna.

[Explanation of symbols]

 1 Pedestal side bearing part 2 Main reflecting mirror side bearing part 3,10 Shafts 4A, 4B block 5 Shaft side sliding member 6 Wedge side sliding member 7 Tightening bolt 8 Bearing mounting bolt 9 Tapered sleeve 11 Housing part 12 Bottom plate part 13 Pedestal Part 14 Main reflecting mirror part 15 Sub-reflecting mirror part 16 EL jack 17 Bearing body

Claims (2)

[Scope of utility model registration request] 1. A parabolic antenna bearing including a main reflecting mirror side bearing portion rotatably attached to a pedestal side bearing portion serving as a fulcrum of a main reflecting mirror driven by an elevation jack, wherein the pedestal side bearing portion is provided. Has two blocks inserted between the housing part supporting the shaft of the shaft and the bottom plate part of the main reflecting mirror side bearing part, and bolts for tightening the two blocks in a wedge shape with appropriate force. A bearing for a parabolic antenna, wherein a gap between the shaft and the pedestal-side bearing portion is narrowed. 2. The two contacting with the outside of the housing part
The bearing for a parabolic antenna according to claim 1, wherein a sliding member is attached to the circular surface of each block.