JPS5810094Y2 - Integration device - Google Patents

Description

[Detailed description of the invention] The present invention provides an integration device that is built into a vehicle speedometer, for example, and that measures the distance traveled by the vehicle by sharing the rotational drive to the speedometer. The present invention relates to the improved integration device described above, which is configured such that it can be driven in one direction and cannot be driven in the other direction to prevent unauthorized backtracking.

Recently, US laws and regulations require that the totalizing device used to measure the mileage of a vehicle be removed from the vehicle so that the digits cannot be reset, as a means of preventing fraudulent transactions in activities such as vehicle transfers and transfers. It has been adopted to install a mechanism that drives only in the direction.

Incidentally, prior to filing this application, various devices that can be used to satisfy the above object have been proposed.

However, all of the above-mentioned devices suffer from several problems, such as complicated mechanisms and unstable operation, and there remain various points that need to be further improved in order to put them into practical use. .

The present invention solves these problems and makes it possible to construct a device that can be used for the above purpose with a simple structure and stable operation.One embodiment of the present invention will be described below in detail based on the attached drawings. .

In Fig. 1, 1 indicates an eddy current type speedometer,
As is well known, the rotary drive from the drive source of the vehicle is branched and transmitted through flexible wires (not shown), the main shaft 2 is rotated and the magnet 3 is moved together, and the magnetic field generated by the magnet 3 is transferred to the magnetic conductor 4. The circuit is configured to act on the rotating body 5, and in response to this, the subshaft 6 is balanced with the elasticity of a hair spring (not shown), converted into angular motion, and the speed is measured. In addition, 7 also indicates a well-known totalizing device, which is normally configured to carry up and rotate from the character wheel 8 of the lower digit to that of the higher digit by relaying an intermediate gear (not shown). and
The gear portion 9 formed on the main shaft 2 is meshed with the gear portion 11 formed on the horizontal shaft 10 to further branch and transmit the rotational drive, and the other gear portion 12 formed on the horizontal shaft 10 and the vertical shaft 13 are formed. Another gear part 15 formed on the vertical shaft 13 is attached to the machine frame 17 so as to mesh with the gear part 14 and to mesh with the drive gear part 16 of the lowest digit of the character wheel 8.

By the way, in FIGS. 2 and 3, a worm is formed in the gear portion 15 of the vertical shaft 13, and a worm wheel is provided between the ohm gear portion 15 and the gear portion 16 connected to the lowest digit of the character wheel 8. 18 are positioned so as to mesh with each other.

The worm wheel 18 is inserted through a pin 19, and the pin 19 is inserted into a long hole 20 formed in the machine frame 17 and located in the axial direction of the vertical shaft 13.
1. It is attached to the machine frame 17 with a washer 22.

Further, the worm wheel 18 is arranged so as to apply a constant pressure in the direction of the machine frame 17 with a spring 23 interposed therebetween.

The operation in the above configuration will be explained.

Now, if the vertical shaft 13 is rotated clockwise, the worm wheel 18 meshing with the worm gear portion 15 is rotated in the opposite direction, and the gear portion 16 of the character wheel 8 is rotated along the vertical shaft 13. Each time the character wheel 8 of the lower digit rotates once, the adjacent higher digit rotates by a certain angle via the intermediate gear, and is sequentially driven toward the higher digit, increasing the vehicle's mileage. Is displayed.

At this time, the worm wheel 18 is supported by the pin 19 in the long hole 20 of the machine frame 17, and since the worm gear portion 15 is formed to intersect with the axial direction of the vertical shaft 13 at a certain angle, the worm gear As the worm wheel 18 meshes with the rotation of the portion 15, a stress is applied which tends to cause the worm wheel 18 meshing with the portion 15 to slide in the axial direction of the vertical shaft 13, in this case upward in FIG. 2, along the elongated hole 20. Upper side of long hole 20 -
The worm wheel 18 is engaged with the terminal edge and the pin 19.
is held in mesh with the worm gear part 15 and another gear part 16.

When the vertical shaft 13 rotates to the left as the vehicle moves backward, the worm wheel 18 that meshes with the worm gear portion 15 is rotated in the opposite direction, and the pin 19 is moved into the elongated hole 2.
0, and the worm wheel 18 finally releases its meshing with the other gear portion 16 as shown by the broken line in FIG. cut.

At this time, the worm wheel 18 is connected to the worm gear part 15.
The position of the lower terminal edge of the elongated hole 20 is set so as not to disengage the mesh with the elongated hole 20.

When the vertical shaft 13 reversely rotates in the right direction from this state, stress due to the meshing with the worm gear portion 15 acts on the worm wheel 18 again, and the pin 19 is inserted into the elongated hole 20.
is moved upward and brought back into mesh with the gear portion 16 to connect the drive to the character wheel 8.

In this case, the movement of the worm wheel 18 along the inside of the long hole 20 is made more smooth by applying pressure in a direction orthogonal to the machine frame 17 by the spring 23.

Further, the moving direction of the worm wheel 18 in the elongated hole 20 can be determined by selecting the shape of the worm gear portion 15, that is, the direction of the intersecting angle of the gear portion 15 with respect to the axis of the vertical shaft 13. The direction of engagement and disengagement with the drive gear section 16 can be arbitrarily set, and the mechanism of the instrument can be adapted to various existing ones without any political change.

Therefore, in the forward direction of the vehicle, the worm gear section, the worm wheel 18, and the other gear section 16 mesh together to move the character wheel 8 up, and for example, the flexible wire is separated from the drive source of the vehicle and the wire is connected to the worm gear section. Even if the attached motor is connected separately and reverse rotation is applied, the rotational drive to the character wheel 8 can be cut off by the action of the worm gear section 15 and the worm wheel 18, and the character wheel 7 can be lowered automatically. Such things are definitely prevented.

Note that the rotational drive to the character wheel 8 is also cut off when the vehicle moves backwards, as described above, but the distance traveled by the vehicle backwards is extremely small compared to that when moving forwards. Since it is not subtracted unlike a general device that does not have an error, the value as an error with respect to the true distance traveled can be further reduced and ignored, and it does not cause any problem in measuring the distance traveled.

As described in detail above, the present invention transmits drive to adjacent character wheels by relaying intermediate gears to display, for example, the distance traveled by a vehicle numerically. A worm wheel is positioned between the worm wheel and another gear part formed on the lowest girder of the machine, and the worm wheel is formed in the machine frame and meshes with the worm gear part in a long hole facing in the axial direction of the shaft. The elongated hole moves the worm wheel, which meshes with the worm gear part when the shaft rotates in one direction, in one direction and meshes with the other gear part. When the shaft rotates in the other direction, the worm wheel that meshes with the worm gear moves in the other direction and disengages only with the other gear, thereby making it possible to rotate the worm wheel without making the device structure extremely complicated. In this case, the worm wheel is disposed in the elongated hole so that a constant pressure is applied to the machine frame in a direction perpendicular to the machine frame. It is possible to smoothly engage and disengage the gears.

[Brief explanation of drawings]

FIG. 1 is a structural diagram of a main part of a conventional device, and FIGS. 2 and 3 are structural diagrams of a main part of an embodiment of the proposed device.

Claims (2)

[Scope of utility model registration request] (1) In a device that transmits drive to an adjacent character wheel via an intermediate gear to display, for example, the distance traveled by a vehicle, the worm gear part formed on the shaft and the lowest digit of the character wheel A worm wheel is positioned between the formed other gear part, and the worm wheel is formed in the machine frame and meshes with the worm gear part in a long hole facing in the axial direction of the shaft to reduce the rotational stress. The elongated hole moves the worm wheel, which meshes with the worm gear part when the shaft rotates in one direction, in one direction and meshes with the gear part, and rotates the worm wheel in the other direction of the shaft. The integrating device is positioned so that the worm wheel that meshes with the worm gear moves in the other direction and disengages only with the other gear when the worm gear rotates. (2) The integrating device according to claim 1, wherein the worm wheel is disposed within the elongated hole so as to apply a constant pressure in a direction orthogonal to the machine frame.