JP2000121363A - Gyrocompass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the gyrocompass which can stably absorb the vibration and shock of a rolling ball support part in the gyrocompass. SOLUTION: A load support part perpendicularly penetrates a joint part 30 which connects a first shaft part 4 and a second shaft part 5 so that they freely slant. At the upper and lower ends of this load support part, a first spring part 20 and a second spring part 21 are installed. Further, a coupling part 11 made of an elastic body is installed at the outer periphery of the joint part 30, and a damper 10 is clamped radially outside a first support board 8 and a second support board 9. Consequently, operating vibration is effectively attenuated by the first and second spring parts 20 and 21, and the rotation of the second shaft part 5 is securely transmitted to the first shaft part 4 through the coupling part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gyro compass used for measuring an azimuth of a ship or the like.

[0002]

2. Description of the Related Art Conventionally, a gyro compass for measuring an azimuth angle with high accuracy has been installed in a ship. The gyro-compass uses a gyro that rotates at a high speed so that it can be freely oriented in any direction, and the axis of the gyro points in the north-south direction in accordance with the rotation axis of the earth. In order to stably rotate the gyro, measures have been taken to attenuate vibrations and impacts acting on the gyro portion.

FIG. 3 shows an example of a conventional gyrocompass. In FIG. 3, a gyro compass 50 is rotatably supported on a support body 51 by a bearing 52.
A shaft 53, a second shaft 55 that is tiltably supported by the first shaft 53 via a ball joint 54, and a first shaft 5.
A first support board 56 and a second support board 57 connected to the third and second shaft portions 55 are provided. A damper 58 is sandwiched between the first support board 56 and the second support board 57 outside the ball joint 54, and an outer bellows 59 made of a cylindrical bellows rubber is provided outward in the radial direction. Is provided. And the rotary ball 6 which is a gyro part
The rotary ball supporting portion 61 supporting the first rotating plate 0 is connected to the second supporting plate 57.

[0004]

In such a gyro compass 50, the outer bellows 59, which is a vibration absorbing portion, is provided so as to be held radially outward of the first support plate 56 and the second support plate 57. And large. Therefore, labor is required when it is desired to change the natural frequency of the vibration absorbing portion in order to cope with various vibration frequencies applied to the gyro compass 50, that is, when it is desired to change the outer bellows 59. In addition, since the number is one, vibration in a high frequency region cannot be sufficiently suppressed. Further, the entire gyro compass 50 is also enlarged.

[0005] The present invention has been made in view of such circumstances, and can stably absorb the vibration and impact of the rotary ball support portion in the compass, and also has a simplified gyro compass. It is intended to provide.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a first shaft portion having an azimuth indicating needle provided on an upper portion thereof, connected to the first shaft portion, and rotatably mounted on a support. A supported first support board, a second support board provided below and opposed to the first support board and connected to the rotary ball support, and a second shaft connected to the second support board. A gyro compass comprising: a joint portion that connects the first shaft portion and the second shaft portion so as to be tiltable with each other; and a first shaft portion and a second shaft portion provided around an outer periphery of the joint portion. A connecting portion made of an elastic body for mutually transmitting rotations, a plurality of dampers provided radially outward of the connecting portion and sandwiched between the first support plate and the second support plate, A load supporting portion penetrated in the vertical direction of the joint portion, and the upper end and the lower end of the load supporting portion The first support plate and the second support plate are penetrated until reaching the upper and lower portions thereof, and a first spring portion and a second spring portion are provided at an upper end and a lower end of the load support portion, respectively. .

According to the present invention, the first spring portion and the second spring portion are provided at the upper end and the lower end of the load supporting portion penetrated through the joint portion, respectively. , The two spring portions of the second spring portion are reliably absorbed.

Further, the vibration absorbing portion is a multi-degree-of-freedom system installed at a plurality of locations as the first spring portion and the second spring portion, and thus can effectively attenuate high frequency components of the acting vibration. . These resonance peaks can be suppressed by combining with a damper having an optimum viscosity coefficient. Further, in order to change the resonance frequency, only the first and second spring portions need to be replaced, so that it is possible to easily cope with the natural frequency of the mounted ship or the like.

A connecting portion for transmitting the rotation of the first shaft portion and the second shaft portion is installed around the outer periphery of the joint portion, and
Since the spring portion and the second spring portion are provided above and outside the joint portion, the entire device is simplified and downsized. Further, since the connecting portion is made of an elastic body, vibration is absorbed by the connecting portion, and the operation of the first and second spring portions is not hindered.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a gyro compass according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view showing one embodiment of a gyro compass of the present invention, and FIG. 2 is an enlarged view of a main part of FIG.

As shown in FIG. 1, the gyro compass 1
A first shaft portion 4 on which the direction indicator needle A is installed, a first support plate 8 connected to the first shaft portion 4, and a first shaft portion provided below and opposed to the first support plate 8. 2 is provided with a second support plate 9 and a second shaft portion 5 connected to the second support plate 9. The second support plate 9 is connected to the rotary ball support portion 2 that supports the rotary ball 2 a that is a gyro portion. Have been. And these are the case 6
It is provided inside.

A disk-shaped support 3 is provided above the housing 6. The support 3 is formed to have a convex cross section and has a flange 3a. A hollow support 3b is formed in the center, and a first shaft hole 3c is provided in the hollow support 3b upward. And
The flange 3a is supported by a step 6a above the housing 6.

At the center of the support 3, a support hollow 3b
The first shaft portion 4 is provided so as to be inserted from below, and comprises a columnar straight portion 4a formed above and a large diameter portion 4b formed below. The large diameter portion 4b is located inside the support hollow portion 3b, and has a first hollow portion 4c opened downward.

The columnar straight portion 4a of the first shaft portion 4 extends upward through the first shaft hole 3c of the support 3, and is rotatably driven by a bearing 7 installed on the upper portion of the support 3. Supported. The large diameter portion 4 connected to the columnar straight portion 4a
b rotates with the rotation of the columnar straight part 4a.

At the lower end of the large diameter portion 4b, there is provided a first support plate 8 having a first engagement hole 8a at the center. The first shaft portion 4 and the first support plate 8 The large-diameter portion 4b is engaged with the engagement hole 8a and fixed by screws or the like to be connected. The first engagement hole 8a of the first support plate 8 and the first hollow portion 4c are formed to be continuous. ing.

The cylindrical second shaft portion 5 has a second hollow portion 5c opened downward, and a second shaft hole 5a is formed in the upper portion. A second support plate 9 having a second engagement hole 9a formed at the center is connected to a lower end of the second shaft portion 5, so that the second engagement hole 9a and the second hollow portion 5c are continuous. It is connected to. And the 1st axis part 4 and the 2nd axis part 5 are provided so that it may be located on the same axis.

Between the first support plate 8 and the second support plate 9,
A plurality of dampers 10, such as air dampers, are provided. The damper 10 is fixedly installed at a portion of the first support plate 8 and the second support plate 9 located at radially outer ends.

As shown in FIG. 2, a connecting portion 11 is provided between the first shaft portion 4 and the second shaft portion 5. The connecting portion 11 is formed of a cylindrical member having elasticity, and is made of, for example, bellows rubber.

A joint portion 30 comprising a housing portion 12 and a ball portion 13 is provided in a cylindrical interior 11a of the connecting portion 11. The housing portion 12 is formed in a cylindrical shape with a bottom and opened downward, a through hole 12a is provided at an upper portion, and a flange portion 12b is formed at an upper end. The housing portion 12 and the connection portion 11 are connected by positioning the upper end of the connection portion 11 between the attachment portion 14 and the flange portion 12b and fixing the connection portion 11 with the screw 15. Also, mounting part 1
4 and the lower end of the first shaft 4 are fixed by screws 16, and the first shaft 4, the housing 12 and the connecting portion 11
Are connected and fixed via the mounting portion 14.

A ball portion 13 is provided inside the housing hollow portion 12c so as to be inserted from below.
The ball portion 13 is formed by a ball tip 1 formed on an upper portion.
3a and a flange portion 13b formed in a circular outline at the lower portion
The ball tip 13a and the flange 13
A straight pipe portion 13c is formed between the straight pipe portion 13b. Further, a through hole 17 is formed in the vertical direction so as to penetrate the center of the ball portion 13. The inner wall surface 12d of the housing portion 12 and the ball tip 13a of the ball portion 13 are in spherical contact.

The flange portion 13b of the ball portion 13 and the upper portion of the second shaft portion 5 are connected and fixed by screws 19.
Further, the lower end of the connecting portion 11 is located between the flange portion 13b and the second shaft portion 5, so that the second shaft portion 5 and the connecting portion 11 are connected to each other so as to be tiltable. It is in a state.

The through hole 17 formed in the ball portion 13
A load supporting portion 18 made of a wire or the like is inserted through. The upper end 18a of the load supporting portion 18 is
3 is provided so as to reach the first hollow portion 4c of the first shaft portion 4 through the through hole 12a of the housing portion 12 after passing through the lower portion 3, while the lower end 18b of the load support portion 18 is connected to the lower portion of the ball portion 13. After penetrating, it reaches the second hollow portion 5c of the second shaft portion 5.

The upper end 18a and the lower end 18 of the load support 18
The first spring part 20 and the second spring part 2
1 is installed. The first spring portion 20 is provided on a first spring engaging portion 20 a formed in a concave shape on the upper end surface of the flange portion 12. On the other hand, the second spring portion 21 is a second spring engaging portion 2 formed in a concave shape on the lower end surface of the ball portion 13.
1a.

The upper end 18a of the load supporting portion 18 extends through the inside of the first spring portion 20 until reaching the upper end portion of the first spring portion 20. On the other hand, the lower end 18b of the load support portion 18
Extends through the inside of the second spring portion 21 until reaching the lower end portion of the second spring portion 21. And the first spring portion 2
0 and the upper end 18a of the load supporting portion 18 are fixed by a first fixing portion 22, while the second spring portion 21 and the lower end 18b are fixed by a second fixing portion 23. At this time,
When installing the first spring portion 20 and the second spring portion 21, the first and second spring portions 20, 21 are fixed after being slightly compressed.

Rotary ball 2 supported by rotary ball support 2
In FIG. 1A, an inverted conical hollow portion 2b opened upward is formed, and a thin shaft 2c is engaged with the hollow portion 2b. And while the rotary ball 2a is supported by the fine shaft 2c,
It is rotated at high speed by an electric motor or the like. Then, the azimuth indicating needle A installed above the first shaft portion 4 is rotated by the horizontal rotation of the rotary ball support portion 2 and the first shaft portion 4 via the second support plate 9 and the connecting portion 11 interlocked therewith. By being rotated, it indicates the correct orientation.

Gyro compass 1 configured as described above
When vibration is applied to the first spring portion 20 and the second spring portion 20 connected by the load support portion 18,
It is absorbed by elastic deformation with the spring portion 21. At this time, the second shaft portion 5 and the second support plate 9 and the rotary ball support portion 2 connected thereto have a structure floating with respect to the first shaft portion 4. Then, the vibration applied by the floating of the second support plate 9 and the rotary ball support portion 2 is attenuated. The first spring portion 20 and the second spring portion 21 are optimally selected so as not to resonate in consideration of the natural frequency of each element of the device such as the marine vessel to be mounted and the rotary ball 2a to be used.

In the joint portion 30, the ball tip portion 13a of the ball portion 13 and the inner wall surface 12d of the housing portion 12 are in spherical contact, and the second shaft portion 5 is supported so as to be tiltable and also in the vertical direction. It is slidable. Therefore, the joint portion 30 does not hinder the action of the first spring portion 20 and the second spring portion 21, and since no moment acts on the joint portion 30, the second support board 9 side is stably floated. You.

The vibration of the second shaft portion 5 and the second support plate 9 in the floating state is attenuated and converged by the action of the damper 10. At this time, the viscosity coefficient of the damper 10 is optimally selected in consideration of the first and second spring portions 20 and 21 used and the frequency region to be damped. In this way, even when vibration is applied, the vibration can be reliably and quickly damped, and resonance can be prevented from occurring.

The rotation of the rotary ball support 2 and the second shaft 5 connected thereto and the rotation of the first shaft 4 rotatably supported by the bearing 7 are transmitted to each other through the connection 11. You.
At this time, since the connecting portion 11 is made of an elastic body such as bellows rubber, the operation of the first and second spring portions 20 and 21 and the tilting of the joint portion 30 are not hindered.

As described above, the first spring portion 20 and the second spring portion 20 are provided on the upper outer side and the lower outer side of the joint portion 30, that is, on the upper end 18a and the lower end 18b of the load supporting portion 18 penetrated through the joint portion 30, respectively. The spring part 21 is installed, and the first
By connecting the spring portion 20 and the second spring portion 21 by the load supporting portion 18 having the joint portion 30 penetrated, the applied vibration can be reliably performed by the two spring portions of the first and second spring portions 20 and 21. Absorbed.

Further, since the vibration absorbing portion is a two-degree-of-freedom system installed at two places of the first spring portion 20 and the second spring portion 21, the vibration acting portion is more effective than when one spring is provided. Are effectively attenuated. These resonance peaks can be suppressed by combining with the damper 10 having the optimum viscosity coefficient. Further, in order to change the resonance frequency, only the first spring portion 20 and the second spring portion 21 need to be exchanged, so that it is possible to easily cope with the natural frequency of each mounted element of the ship or the device. And a wide range of frequencies can be accommodated.

The connecting portion 11 for transmitting the rotation of the first shaft portion 4 and the second shaft portion 5 is installed on the outer periphery of the joint portion 30, and the first spring portion 20 and the second spring portion 21 are connected to the joint portion 30. The entire gyro compass 1 device is downsized by being provided on the upper outer side and the lower outer side. Further, since the connecting portion 11 is made of an elastic body,
The vibration is also absorbed by the connecting portion 11 and the first
The function of the spring portion 20 and the second spring portion 21 is not hindered.

The ball tip 13a of the ball portion 13
Is engaged with the housing hollow portion 12c of the housing portion 12, so that a large horizontal movement of the second shaft portion 5 with respect to the first shaft portion 4 is locked.

[0034]

The gyro compass of the present invention has the following effects. (1) The first and second spring portions are provided at the upper end and the lower end of the load support portion penetrated through the joint portion, respectively, so that the applied vibration is reduced by the first and second spring portions. It is reliably absorbed by the two spring portions. (2) Since the vibration absorbing portion is a multi-degree-of-freedom system installed at a plurality of locations as the first spring portion and the second spring portion, it is possible to effectively attenuate high frequency components of the acting vibration. These resonance peaks can be suppressed by combining with a damper having an optimum viscosity coefficient. Further, in order to change the resonance frequency, only the first and second spring portions need to be replaced, so that it is possible to easily cope with the natural frequency of the mounted ship or the like. (3) A connecting portion for transmitting the rotation of the first shaft portion and the second shaft portion is provided around the outer periphery of the joint portion, and the first spring portion and the second spring portion are located outside and above the joint portion. By being provided on the lower outer side, the entire device is simplified and downsized. Further, since the connecting portion is made of an elastic body, vibration is absorbed by the connecting portion, and the operation of the first and second spring portions is not hindered.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of an embodiment of a gyro compass of the present invention.

FIG. 2 is an enlarged view of a joint part of FIG.

FIG. 3 is a diagram illustrating a conventional gyrocompass.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 gyrocompass 2 rotary ball support 3 support 4 first shaft 5 second shaft 6 housing 7 bearing 8 first support board 9 second support board 10 damper 11 connecting part 12 housing part 13 ball part 14 mounting part 18 Load support part 20 First spring part 21 Second spring part 30 Joint part

Claims (1)

[Claims] A first shaft portion having an azimuth indicating needle installed at an upper portion thereof; a first support plate connected to the first shaft portion and rotatably supported by a support; and a lower portion of the first support plate. A gyro compass comprising: a second support plate connected to the rotary ball support portion; and a second shaft portion connected to the second support plate, wherein the first shaft portion and the second shaft portion A joint portion that connects the shaft portion to each other so as to be tiltable, and a connecting portion provided around the joint portion and formed of an elastic body for mutually transmitting rotation of each of the first shaft portion and the second shaft portion. A plurality of dampers provided radially outward of the connecting portion and sandwiched between the first support plate and the second support plate, and a load support portion penetrated in a vertical direction of the joint portion; The upper end and the lower end of the load support portion are the first support plate and the second support plate.
A gyrocompass, wherein the gyrocompass is penetrated until reaching the upper and lower parts of a support board, and a first spring part and a second spring part are respectively installed at an upper end and a lower end of the load support part.