JPS628447Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a speed reduction device that drives a geared cable.

Conventionally, when two parallel geared cables are moved by the same amount in opposite directions, there has been no suitable device for driving between the geared cables.

This idea is based on two geared cables and foils that interlock on both sides across the diameter. To drive this, a general transmission device is used, for example, when decelerating with a worm gear and gear transmission from the worm wheel, the gear is placed in parallel with the worm wheel on the shaft to which the worm wheel is fixed, or on one side of the worm wheel. It is usually fixed at . In this way, it is difficult to make these devices small when they are housed in a narrow space, and when using gear transmission, a large force is applied to the gear side. If the worm wheel and gear are fixed and rotated on a shaft, the bearing portion is likely to wear unevenly.

The purpose of this invention is to solve the above-mentioned problems in the driving method between two geared cables moving in opposite directions, and to provide a geared cable reducer with a narrow width and a small storage space.

Examples of this invention will be described below with reference to the drawings. FIG. 1 is a front view with a geared cable on the output side, and FIG. 2 is a sectional view taken along line AA in FIG. 1.
A cover 2 is fixed to the case 1 with machine screws 3. The cover 2 forms one end of a bearing on the worm side, and a rotary shaft 4 is fitted into a diagonally bored hole so as to be rotatable. A worm 5 is fixed to the shaft 4. The shaft 4 has its stepped part and the worm 5
The cover 2 is held between the sides of the cover 2 so that it cannot be moved. The tip of the shaft 4 is rotatably fitted into a hole in the case 1. The worm 5 and worm wheels 6, 6' are engaged with each other. (In the figure, it is shown as a helical gear.) The teeth of the worm wheels 6 and 6' are of a shape in which the center portion of the tooth width of the integral worm wheel is missing. The outer diameter of the boss of the worm wheel 6 is hexagonal, and the hexagonal hole in the center of the toothed foil 9 and the worm wheel 6' is fitted into the toothed foil 9, which has teeth parallel to each other in the circumferential direction and engages with the geared cables 7 and 8 on both sides across the diameter. The retaining ring 11 for the shaft is fitted into the groove at the end, and these are integrally constructed. That is, coaxial worm wheels 6, 6' having a larger diameter than the foil 9 are integrally provided on both sides of the foil 9.

The worm wheel 6 slides onto the shaft 12, and the side surfaces of the bosses of the worm wheel 6 abut against the case 1 and the cover 2 to prevent axial movement. The shaft 12 has one end inserted into a hole in the case 1 and the other end inserted into a hole in the cover 2 and fixed thereto.

Two guides 13, 13 and 14, 14 are provided on a straight line apart from each other on the case 1. The geared cables 7 and 8 slide in parallel into guides 13 and 14 integrally molded into the case 1, respectively. The geared cables 7 and 8 are each extended and connected to a moving part or other power transmission mechanism at a portion (not shown) for operation.
The shaft 4 is rotated manually or by power.

When the shaft 4 rotates, the worm 5 rotates together with the shaft 4, and the worm wheels 6, 6' and the toothed wheel 9 rotate together. Geared cables 7 and 8 are guided by guides 13 and 14, respectively, and move in opposite directions. If the helix angle of worm 5 is set below the automatic tightening angle, geared cables 7 and 8
It cannot be driven from the side.

As described above, this invention provides a toothed foil that engages with the geared cable on both sides across its diameter, and drives the toothed foil, so that the geared cable can be driven in the middle of parallel geared cables. The geared cable is supported by each of the two guides, and the geared cable is engaged with the toothed foil between the two guides, so that the rigidity of the geared cable is maintained. Since coaxial worm foils are integrally provided on both sides of the toothed foil that engages with the geared cable, the widthwise dimension of each foil is small, and the space required to fit it is small. Since the worm engages with the worm foils that are integrally provided on both sides of the toothed foil that engages with the geared cable, the bearing support conditions for the worm foil are good even if the dimension in the tooth width direction is small, and uneven bearing wear can be reduced. Since the worm is installed obliquely, the amount of protrusion of the worm shaft in the width direction is small. This has the advantage that there is no need to provide a speed reduction device separately from the geared cable drive device.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of this invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 5... Worm, 6, 6'... Worm foil, 7, 8... Geared cable, 9... Toothed foil, 13, 14... Guide.

Claims (1)

[Scope of utility model registration request] Two guides are arranged parallel to each other in a straight line apart from the case, and the two guides are supported so as to be movable on a straight line within the case by passing through the two guides respectively, and extend outward on both sides of the case. The geared cable is provided with toothed foils that engage with the geared cable on both sides across its diameter within the case, and worm foils having a larger diameter than the coaxial foils are integrally provided on both sides of the foil, and each of these A geared cable speed reducer consisting of a wheel rotatably supported in a case and a worm that engages with the worm wheel mounted on an oblique shaft.