JPS6143204Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gyro compass, and more particularly to a gyro compass that is designed to prevent resonance of the gyro and indication errors caused by ship vibration.

A gyroscope compass mainly supports a wheel ball that has an integral needle card within the frame so that it can turn in the direction, but the frame is also designed so that it is always held horizontally against the rolling and pitching of the ship's hull. It is attached to the inner gimbal ring using a number of suspension springs and buffer springs, and the inner gimbal ring is connected to the outer gimbal ring by a left-right axis, and the outer gimbal ring is connected to the case by a front-rear axis. It is said that The shafts that connect the inner gimbal ring, the outer gimbal ring, and the case often have a ball bearing structure in order to make the relative movement between them easier.

However, with this gyroscope, if the bottom of the ship comes into contact with the wave crest at one or more points when the wave height is high, such as during stormy weather, the ship's body will bend around the center due to its own weight and vibrate. The cycle is 1 to 3 seconds. When this vibration occurs, the part of the ship where the gyro compass is installed appears to vibrate back and forth (strictly speaking, it is a reciprocating motion along an arcuate trajectory), and its amplitude is as high as 30 mm. When such back-and-forth vibration occurs, the bearing friction on the aforementioned shaft is too light, causing the inner gimbal ring and outer gimbal ring to resonate like a pendulum with respect to the outer gimbal ring and the case, respectively, resulting in damage to the frame and rotation. A phenomenon has occurred in which the wheels and balls vibrate violently. Therefore, there is a problem in that the center pin of the gyro compass is broken or bent, damaging the gyro compass, and even if the center pin is not broken, azimuth indication malfunctions occur.

To deal with this, it is possible to use a sliding bearing structure for the bearing, but using a conventional sliding bearing made of metal materials as is would require a lubricating oil supply structure, etc., which would complicate the structure. There is a problem in that the inner gimbal ring and the outer gimbal ring tend to wear out due to intense vibration, resulting in low durability.

The present invention was developed in view of the above points, and prevents resonance of the inner gimbal ring and outer gimbal ring due to severe vibrations of the ship's hull, thereby preventing damage to the gyro compass and malfunction of direction indication.
Moreover, it is an object of the present invention to provide a gyroscope compass that can achieve improved durability.

In order to achieve this purpose, the gyroscope compass of the present invention is configured to act as a bearing for the inner gimbal ring and the outer gimbal ring, and to apply a predetermined frictional force to the rocking motion of the inner gimbal ring and the outer gimbal ring. It is characterized by:

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

1 to 4 show an embodiment of the present invention, in which a gyro compass 1 is provided with a cylindrical container-shaped case 2 having a window 3 in the upper part. This case 2
An outer ball 6 in which a rolling ball 4 is supported by a supporting liquid 5 is arranged in the center of the frame 7, and bearings 8 and 9 at the upper and lower parts of the frame 7 cause azimuth rolling (horizontal rolling) within the frame 7. ) can be pivoted. This frame 7 has a plurality of suspension springs 10 around its upper part.
and a buffer spring 11 are disposed in an annular shape, and one end of each spring is hooked to the support ring 12 integrated with the frame, and the other end is hooked to the inner gimbal ring 13. Suspended and supported. Furthermore, a plurality of anti-sway springs 14 are hung between the lower part of the frame 7 and the case 2 to prevent the frame from swinging.

The inner gimbal ring 13 is formed into a short cylindrical shape and is arranged approximately horizontally within the case 2. On the other hand, an outer gimbal ring 15 in the form of a plate ring is interposed between the inner gimbal ring 13 and the case 2. I am wearing it. As shown in FIG. 2, the inner gimbal ring 13 and the outer gimbal ring 15 are connected by bearings 16, 16 so as to be vertically swingable at opposing positions along one direction of the gyro compass. At opposing positions along a direction perpendicular to the horizontal direction, the outer gimbal ring 15 and the case 2 are connected by bearings 17, 17 so as to be vertically swingable in a direction perpendicular to the above-mentioned direction. That is, the bearing 1
6 and 16, as shown in FIG. 3, an annular flange member 18 and a cylindrical container-shaped lid member 19 are integrally attached to the inside of the inner gimbal ring 13 to form a cylindrical bearing casing 20. On the other hand, the tip of a shaft 21 that is screwed and protrudes in the inner diameter direction inside the outer gimbal ring 15 is inserted into the bearing casing 20 . A thick disk-shaped bearing member 22 is mounted on the tip of the shaft 21, and is configured to be rotatable within the bearing casing 20. This bearing member 22 uses a resin material in the present invention, and the surface friction of the resin material causes the shaft 21 to
A slight frictional force acts between the bearing casing 20 and the bearing casing 20 in the axial rotation direction.

On the other hand, as shown in FIG. 4, the bearings 17, 17 connecting the outer gimbal ring 15 and the case 2 constitute a bearing casing 25 on the outside of the case 2 with a flange member 23 and a lid member 24, while the outer gimbal ring A shaft 26 is screwed and protruded in the radial direction on the outside of the ring 15, and is supported by a resin bearing member 27 rotatably installed inside the bearing casing 25. In other words, the bearings 16, 16
It is configured almost the same way.

The gyroscope 1 is attached to the hull so that the bearings 16, 16 are arranged in the left-right direction of the hull, and the bearings 17, 17 are arranged in the longitudinal direction of the hull.

According to the above configuration, when rocking or vibration occurs in the longitudinal direction of the hull, the inner gimbal ring 13 is integrated with the frame 7 and the rolling ball 4 inside the bearing 16, 16.
It swings up and down in the front and back direction with respect to the outer gimbal ring 15 with the axis as an axis, and keeps the rolling ball 4 and the like horizontally. On the other hand, when rolling or horizontal vibration occurs in the hull, the outer gimbal ring 15 is integrated with the inner gimbal ring 13, the frame 7, etc., and the bearings 17, 17
It is possible to keep the rolling ball 4 and the like horizontally by swinging up and down in the left and right directions with respect to the case 2 about the axis. In this case, in the bearings 16 and 17, the bearing casing 20,
Since the shafts 21 and 26 are rotated while the bearing members 22 and 27 are rotated in the bearing members 25, the friction of the bearing members 22 and 27 (mainly between the inner surface of the bearing casings 20 and 25 and the outer circumferential surface of the bearing members) ), a larger frictional force acts on the rotation of the shafts 21, 26 than in the case of ball bearings. Therefore, the inner gimbal ring 1
3 and the outer gimbal ring 15 are slightly resisted by this frictional force, and uncontrolled swinging is prevented. As a result, severe pitching and rolling occur in the hull during stormy weather, causing the frame 7
etc. are inner gimbal ring 13 and outer gimbal ring 1.
Even if the frame 7 and the like are rocked relative to the case 2 (hull), the frictional force in the bearings 16 and 17 prevents the frame 7 etc. from violent rocking or resonance, preventing the center pin from breaking or changing the direction. Erroneous instructions can be prevented.

The frictional force generated in the bearings 16 and 17 is due to the bearing members 22 and 27 made of resin material, but due to their self-lubricating properties, a lubricating oil supply structure is not necessary, and materials with high wear resistance should be used. In this case, it is possible to obtain a product with sufficiently excellent durability.

It should be noted that the specific configuration of the bearings 16 and 17 according to the present invention is not limited to that of the embodiment described above, and that the configurations of the bearing casing, shaft, bearing members, etc. can be changed as appropriate. Needless to say.

As described above, according to the gyroscope compass of the present invention, resin bearing members with a slight friction force are used for the bearings of the inner gimbal ring and outer gimbal ring, so the frame can withstand severe longitudinal vibrations of the hull. etc. will not resonate, thereby preventing damage to the gyro compass, preventing incorrect direction indication, and further improving the durability of the compass.

[Brief explanation of the drawing]

FIG. 1 is a broken sectional view of the gyro compass of the present invention, FIG. 2 is an exploded perspective view of the main parts, and FIGS. 3 and 4 are enlarged views of the main parts of FIG. 1, respectively. 1...Gyroscope compass, 2...Case, 4...
... Rolling ball, 7 ... Frame, 13 ... Inner gimbal ring, 15 ... Outer gimbal ring, 16, 17
... Bearing, 20 ... Bearing casing, 21 ...
Shaft, 22...Bearing member, 25...Bearing casing, 26...Shaft, 27...Bearing member.

Claims (1)

[Scope of utility model registration request] A frame containing a rolling ball, etc. inside is suspended and supported on an inner gimbal ring, while this inner gimbal ring is swingably supported on an outer gimbal ring by a bearing, and this outer gimbal ring is attached to the outer gimbal ring. In a gyroscope compass that is swingably supported in a case by one bearing and another bearing disposed perpendicularly to the horizontal direction, the one and other bearings are connected to the inner gimbal ring and the outer gimbal ring, respectively. A gyro compass characterized in that the case is configured to have a bearing structure that applies a predetermined frictional force to vibrations to prevent the case from resonating with external vibrations.