JPH0716922Y2 - Anti-vibration device for rotation transmission device of indicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vibration isolator in a rotation transmission device of an indicating instrument that transmits rotation from a drive shaft to a rotation shaft at an appropriate angle.

[Prior Art] A conventional device of this type, for example, a rotation transmitting device of an eddy current pointer instrument as shown in FIGS. 4 and 5, has a plate 2 installed at an open end of a frame 1 formed in a U shape. A bearing 3 is fixed to the bottom wall of the frame 1 by a caulking portion 4, a rotary shaft 5 is rotatably supported by the bearing 3, and a magnet 6 is provided on the peripheral side portion of the upper end of the rotary shaft 5, and the plate 2 The upper end side of the pointer shaft 7 and the lower end of the pointer shaft 7 on the upper end portion of the rotary shaft 5, and the guide plate 8 arranged with the magnet 6 with a small clearance. , The pointer 9 is fixed to the upper end of the pointer shaft 7, the bearing 3 is inserted into the mounting hole 11 of the instrument case 10, and the drive shaft 13 orthogonal to the rotary shaft 5 and connected to the flexible cable 12 is provided. The drive gear 14 on the side of the drive shaft 13 and the driven gear on the side of the rotary shaft 5 that support the shafts and connect the shafts 5 and 13 to each other. The meter case the gear box 16 having a built-in 15
The gear box 16 is fitted into the bearing 3 from the outside of 10.
The instrument case 10 and the bearing 3 are fixed to each other by a plurality of screws 17. Therefore, when a disturbance factor such as a vibration of the vehicle occurs, the rotary shaft 5 is placed in the clearance between the rotary shaft 5 and the bearing 3.
Resonates in the radial direction, and as a result, since the lower end side of the pointer shaft 7 is pivotally supported by the rotating shaft 5, the pointer shaft 7 is linked to the resonance operation of the rotating shaft 5, and the rotating operation of the pointer shaft 7 is accurate. However, there is a problem in that the pointer 9 does not operate properly and the pointing operation of the pointer 9 is not performed accurately. On the other hand, the actual Kaisho 50-112
872 publication is proposed. It supports both sides of the worm shaft by a pair of tapered roller bearings that receive thrust loads in opposite directions, and an elastic ring is interposed between the outer ring of each tapered roller bearing and the end surface of its bearing cover. It is a bearing assembly device for a worm shaft in a worm reducer.

[Problems to be Solved by the Invention] In the above-mentioned prior art, even when the bearing assembly device of Japanese Utility Model Publication No. Sho 50-112872 is applied to the indicating instrument, the outer surface of the tapered roller bearing and the end surface of the bearing cover are disclosed in this publication. Although a thrust restriction structure that absorbs the extension of the worm shaft due to temperature rise during operation is disclosed by an elastic ring interposed between the and, the radial runout of the shaft caused by external factors such as vibration There is a problem that it cannot be prevented, and even if it is applied to an indicating instrument, a malfunction such as a needle shake cannot be prevented.

[Object of the Invention] The present invention is a rotation transmitting device for an indicating instrument, which can suppress the radial swinging due to resonance of a rotating shaft caused by a disturbance factor such as vibration, and can keep a good indication of a pointer. The purpose of the present invention is to provide a vibration-proof device.

[Outline of the Invention] In the present invention, a bearing for pivotally supporting a rotary shaft is provided on the bottom wall of a frame, a lower end of a pointer shaft is pivotally supported at an upper end portion of the rotary shaft, and a pointer is provided at an upper end of the pointer shaft. A gear box that rotatably supports a drive shaft that makes an appropriate angle with the rotary shaft and that incorporates a drive gear on the drive shaft side that connects the rotary shaft and the drive shaft and a driven gear on the rotary shaft side is provided directly or on the frame side. In a vibration-proof device in a rotation transmission device of an indicating instrument that is indirectly fixed through another member, a lower bearing that axially supports the lower side of the rotating shaft is provided, and a peripheral side portion of the lower bearing is
Since the rotary shaft is fixed to the gear box through the radial regulating elastic member that suppresses resonance of the rotary shaft in the radial direction due to the clearance between the bearing and the rotary shaft, the rotary shaft is mainly supported by the bearing. Since it is supported and the lower side is also axially supported by the lower bearing, the resonance action is suppressed, and the radial regulating elastic member can suppress the vibration action in the radial direction of the rotating shaft. As a result, the rotary operation of the pointer shaft rotatably supported on the upper end of the rotary shaft is stabilized.

Embodiments of the Invention Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the first embodiment of the present invention. Explaining the description of the eddy current type indicator instrument part, the upper wall of the rotary shaft 23 is attached to the bottom wall 22 of the frame 21 formed in a U shape. A bearing member 24 for supporting is provided.

The bearing member 24 is formed by a tubular boss portion 25 that is directly fixed to the frame 21 side and a bearing portion 26 that rotatably supports the rotating shaft 23. The tubular boss portion 25 is attached to a mounting hole 28 of the instrument case 27. The drive shaft 29 is fitted to the tubular boss portion 25, forms an appropriate angle with the rotary shaft 23, and is orthogonally supported to support a drive shaft 29 connected to a flexible cable (not shown). The gear box 32 containing the drive gear 30 on the side of the drive shaft 29 and the driven gear 31 on the side of the rotary shaft 23 that connect the 29 to each other is installed in the above instrument case.
It is fitted from the outside of 27 and is fixed integrally with the instrument case 27 side by a screw 33.

The lower side of the rotary shaft 23, that is, the lower bearing 34 that axially supports the lower side of the driven gear 31, is provided.
The gear box via the elastic member 35 for radial regulation that suppresses the resonance of the rotary shaft 23 in the radial direction due to the clearance between the bearing member 24 and the rotary shaft 23.
It is fixed at 32.

More specifically, in this embodiment, the lower bearing 34
Is made up of a cylindrical bearing portion 36 that rotatably supports the lower side of the rotary shaft 23, and a radial regulation elastic member 35 that holds the bearing portion 36.
Is placed on the concave lid 37, and the lid 37 is attached to the gear box 32.
The gearbox 32 side to which the lid body 37 is attached and fixed to the peripheral side portion of the bearing portion 36 which is the lower bearing 34 by fitting and fixing the lid body 37 through the radial regulating elastic member 35. It is fixed to.

Therefore, even if disturbance factors such as vibration and shock of the vehicle occur, the upper side of the rotary shaft 23 is supported by the bearing portion 26 of the bearing member 24, and the lower side of the rotary shaft 23 is also elastic member for radial regulation.
The bearing portion 36 of the lower bearing 34 supports and retains it via 35, and the resonance of the rotating shaft 23 generated by the clearance between the bearing portion 26 and the rotating shaft 23 is suppressed. The radial swing of the pointer 9 pivotally supported at the upper end is also suppressed, and the pointer 9 can be kept in good condition.

FIG. 2 shows a second embodiment of the present invention. When the same parts as those in the first embodiment are designated by the same reference numerals, the bearings of the lower bearing 34 supporting the lower side of the rotary shaft 23 are shown here. The bearing 39 is used as a member. In this case, the gear box 32
Directly to the frame 21 side without using the instrument case 27
Fixed by.

It is possible to obtain the same operation and effect as those of the first embodiment described above, and the bearing 39 rotates following the rotational movement of the rotary shaft 23, so that the rotary operation of the rotary shaft 23 can be performed smoothly. it can.

FIG. 3 shows a third embodiment of the present invention. When the same parts as those in the first embodiment are designated by the same reference numerals, the bearings of the lower bearing 34 which rotatably supports the lower side of the rotary shaft 23 are shown here. The portion 36 and the radial regulation elastic member 35 that holds the bearing portion 36 are fixed to the gear box 32.
A fitting portion 40 is formed on the opening 38 side of the fitting member 40 so as to face the outer peripheral surface of the radial regulation elastic member 35, and the bearing portion 36 is formed in the fitting portion 40.
The elastic member 35 holding the above is fitted and disposed, and the plate-shaped lid 41 is disposed from the outside of the gear box 32 in the opening 38, and the lid 41 is attached to the gear box 32 by the caulking portion 42. Attach and fix,
The elastic member 35 for radial regulation is held by the fitting portion 40 and the lid 41 so as to be supported by the bearing portion 36 on the lower side of the rotary shaft 23. In this case, the elastic member 35 for radial regulation is used. Is attached by the fitting portion 40 and the lid 41.
It is possible to prevent the accompanying movement of the bearing portion 36 and the radial regulation elastic member 35 linked to the rotational movement of the.

In this embodiment, the bearing 39 using the bearing portion 36 for the lower bearing 34 may be used, and the gear box 32 is fixed to a part of the bearing member 24 with screws 33 or the like. Attach the instrument case 27 to the flange 43 provided on 24 with screws 33
It may be rotated and fixed by A.

[Advantage of the Invention] As described above, the present invention provides the bearing for pivotally supporting the rotary shaft on the bottom wall of the frame, supports the lower end of the pointer shaft on the upper end of the rotary shaft, and supports the upper end of the pointer shaft on the upper end. A frame is provided with a gear box that has a pointer, supports a drive shaft that makes an appropriate angle with the rotary shaft, and incorporates a drive gear on the drive shaft side that connects the rotary shaft and the drive shaft and a driven gear on the rotary shaft side. In a vibration isolation device of a rotation transmission device of an indicating instrument, which is directly or indirectly fixed to a side of the rotary shaft, a lower bearing for supporting the lower side of the rotary shaft is provided, and a circumference of the lower bearing is provided. The side portion is fixed to the gear box via an elastic member for radial regulation that suppresses resonance of the rotation shaft in the radial direction due to the clearance between the bearing and the rotation shaft, thereby vibration of the vehicle, etc. The disturbance factor of Also support the rotating shaft by the upper and lower bearings,
Further, since the lower side of the rotary shaft is supported and supported by the lower bearing via the elastic member for radial regulation, the radial runout of the rotary shaft due to resonance can be suppressed, and the shaft at the upper end of the rotary shaft can be suppressed. The swing of the supported pointer shaft is also suppressed, and the pointer indication can be kept in good condition.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is an overall longitudinal sectional view showing a first embodiment of the present invention, and FIG. 2 is a schematic diagram showing a second embodiment of the present invention. FIG. 3 is a vertical sectional view of a main part showing a third embodiment of the present invention, FIG. 4 is an overall vertical front view showing a conventional device, and FIG. 5 is a vertical side view of FIG. Is. 21 …… Frame, 22 …… Bottom wall 23 …… Rotary shaft, 24 …… Bearing member 29 …… Drive shaft, 30 …… Drive gear 31 …… Driven gear, 32 …… Gear box 34 …… Lower bearing 35 ...... Elastic member for radial regulation

Claims (1)

[Scope of utility model registration request] 1. A bearing for pivotally supporting a rotary shaft is provided on a bottom wall of a frame, a lower end of a pointer shaft is pivotally supported at an upper end portion of the rotary shaft, and a pointer is provided at an upper end of the pointer shaft. A gear box that rotatably supports a drive shaft that makes an appropriate angle and that incorporates a drive gear on the drive shaft side that connects the rotary shaft and the drive shaft and a driven gear on the rotary shaft side directly to the frame side or another member. In a vibration-proof device in a rotation transmission device of an indicator instrument that is indirectly fixed via, a lower bearing that axially supports the lower side of the rotating shaft is provided, and a peripheral side portion of the lower bearing is used as the bearing. A vibration-proof device in a rotation transmission device of an indicating instrument, characterized in that it is fixed to the gear box via an elastic member for radial regulation that suppresses resonance of the rotation shaft in the radial direction due to clearance with the rotation shaft. .