JPH0534052Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a totalizer used in automobile odometers and the like.

[Prior Art] Conventionally, this type of totalizer has been known as disclosed in Japanese Unexamined Utility Model Publications No. 146209/1982 and No. 185069/1989.

8 to 13 show a conventional structure, in which a plurality of number rings 2 are rotatably inserted through a support shaft 1 provided on a frame (not shown), and the lower digit side surfaces of each number ring 2 are 20 internal gear-shaped continuous teeth 3
, and two intermittent teeth 4 and 5 in the shape of an internal gear wheel are formed on the side surfaces of the upper digit of each number ring 2, and a holder 6 is fixed by being locked to a frame etc. between each number ring 2. A pinion 8 is provided with six teeth 7 that can be simultaneously engaged with the continuous teeth and the adjacent intermittent teeth 4 and 5 on the holder 6.
The teeth 7 are provided with long teeth 7a with a long tooth width and short teeth 7b with a short tooth width alternately, and a locking surface 9 and a locking surface 9 that can be opposed to one side of the short teeth 7b are provided on the upper digit side of the number ring 2. A locking circumferential surface 10 that can simultaneously face the top surfaces of two adjacent long teeth 7a is provided in a region other than the valley 11 between the intermittent teeth 4 and 5, and a drive gear 12 is provided on the continuous tooth 3 of the lowest number wheel 2.
It is configured such that it can be engaged with.

When the drive gear 12 is rotated, the lowest number wheel 2 also rotates in the direction of the solid line arrow in FIG. 10, and when the lowest number wheel 2 rotates once as shown in FIG. meshes with the pinion 8, and the pinion 8 rotates 1/3 of a turn. Due to the meshing of the upper digit side of this pinion 8 and the continuous tooth 3 of the number wheel 2 of the next row, the number wheel 2 of the next row becomes 1/10. It rotates to perform a digit movement, and each number wheel 2 can display an integrated value.

In addition, except during the shifting movement, the short teeth 7b of the pinion 8 face the locking surface 9, and the top surfaces of the two adjacent long teeth 7a simultaneously face the locking peripheral surface 10, as shown in FIG. Rotation of the pinion 8 is restricted to prevent unexpected rotation of the number wheel 2.

[Problems to be solved by the invention] However, the pinion 8 of the above-mentioned conventional structure has teeth 7 in which six long teeth 7a and six short teeth 7b are alternately provided as shown in FIGS. 12 and 13. tooth 7
The upper digit sides of a and short teeth 7b are meshed with 20 consecutive teeth 3 to obtain a reduction ratio of 2 x 6/6 x 20 = 1/10, and the structure is such that the adjacent number ring 2 is sent 36 degrees. Therefore, the continuous tooth 3 and pinion 8 may be assembled with an 18 degree misalignment corresponding to one tooth, and the numbers 0 to 9 attached to each number ring 2 may be assembled with misalignment. It has the disadvantage that it can be stored away.

[Means for Solving the Problems] The purpose of the present invention is to solve these inconveniences. In the case where a plurality of continuous teeth are formed on the side, intermittent teeth are formed on the upper digit side of the number ring, and a pinion is provided that can mesh simultaneously with the continuous teeth and the adjacent intermittent teeth, the number of teeth of the above pinion and position specifying means for changing the tooth width or tooth height of the pinion teeth for each common divisor of the number of teeth of the continuous teeth, and correspondingly changing the tooth width or tooth height of the continuous teeth. The totalizer is characterized in that it is configured with the following features:

[Effect] For each common divisor of the number of pinion teeth and the number of continuous teeth,
The meshing position of the pinion tooth and the continuous tooth is determined by a position specifying means set by changing the tooth width or tooth height of the pinion tooth and correspondingly changing the tooth width or tooth shape of the continuous tooth. is specified.

[Example] Figures 1 to 7 show examples of the present invention. Figures 1 to 3 show the first embodiment, Figure 4 shows the second embodiment, and Figures 5 to 7 show the second embodiment. This is a third example.

Incidentally, in FIGS. 8 to 13, the same reference numerals are given to the same parts as the conventional structure.

In the first embodiment shown in FIGS. 1 to 3, 13
is a position specifying means, and in this case, only the upper digit side of the long teeth 7a of the pinion 8 is cut out by length x, and the tooth width of the pinion 8 is changed every other tooth, and the tooth width of the pinion 8 is changed every other tooth. A hill portion 14 is provided corresponding to the end face of the long tooth 7a which is notched every other tooth, and by changing the tooth width of the continuous tooth 3 every other tooth, the hill portion 14 is provided with a pinion 8. long tooth 7
The structure is such that only the upper digits of a can face each other.

Therefore, if the pinion 8 is misaligned by one tooth with respect to the normally assembled continuous tooth and pinion 8 meshing position during assembly work, in other words, the short tooth 7b of the pinion 8 is misaligned with the continuous tooth 3. When attempting to engage the valley with the hill 14, the pinion 8 and the continuous tooth 3 will not be able to be assembled, and the operator will have to make sure that the pinion 8 and the continuous tooth 3 are not in the normal assembly position. It is possible to recognize that there is an incorrect positional relationship.

Since this first embodiment has the above configuration, the short tooth 7b of the pinion 8 is located at the hill portion 14 by the position specifying means 13.
The long teeth 7a can mesh only with the valleys where the ridges 14 are present, and the position where the continuous teeth 3 and the pinion 8 mesh can be determined. Therefore, the mounting position of the pinion 8 can be determined. You can prevent it from shifting.

The second embodiment shown in FIG. 4 shows another example of the position specifying means 13, in which the depth h of the valley of the continuous tooth 3 is changed every other tooth to change the tooth height, and the tooth height of the pinion 8 is also changed. This is changed to every other piece to match h.

In this embodiment, the long teeth 7a of the pinion 8 are formed to have a high tooth height, and the short teeth 3 are formed to have a low tooth height, and the long teeth 7b, which are formed to have a high tooth height, are
It meshes only with the deeper valley of the continuous tooth 3 at depth h,
The short teeth 3 formed with a low tooth height have the depth h of the continuous teeth 3.
It is designed so that it can fit only in the shallower trough.

In this second embodiment as well, the meshing position between the continuous teeth 3 and the pinion 8 can be specified, and the same effects as in the first embodiment can be obtained.

The third embodiment shown in FIGS. 5, 6, and 7 uses the present invention in a so-called outer pinion type totalizer. In this case, the depth B of the valley of the continuous teeth 3 is changed to every other tooth, and the pinion The tooth width is changed every other tooth to match B.

In this third embodiment as well, the meshing position between the continuous teeth 3 and the pinion 8 can be specified, and the same effects as in the first and second embodiments can be obtained.

In the above embodiment, the tooth width or tooth height is changed every other tooth of the pinion 8, but it may also be changed, for example, for every common divisor of the number of teeth of the pinion 8 and the number of teeth of the continuous teeth 3. However, the present invention is not limited to the above embodiments.

[Effects of the invention] As described above, the present invention has a plurality of number rings rotatably provided on the support shaft, a plurality of continuous teeth are formed on the lower digit side of the number ring, and a plurality of continuous teeth are formed on the upper digit side of the number ring. In a pinion that forms intermittent teeth and is capable of simultaneously meshing with a continuous tooth and an adjacent intermittent tooth, the tooth width of the pinion tooth is determined for each common divisor of the number of teeth of the pinion and the number of teeth of the continuous tooth. Alternatively, the tooth height is changed, and the position specifying means is set by changing the tooth width or tooth height of the continuous teeth correspondingly, so that the meshing position of the continuous teeth and the pinion can be specified. Therefore, it is possible to prevent the pinion assembly position from shifting.

As described above, the intended purpose can be fully achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an exploded perspective view of the first embodiment, Fig. 2 is a sectional view thereof, Fig. 3 is a side view of the pinion, and Fig. 4 is a diagram showing the second embodiment. 5 is a front view of the third embodiment, FIG. 6 is a sectional view thereof, FIG. 7 is a partial perspective view thereof, FIG. 8 is an exploded perspective view of the conventional structure, and FIG. 9 is its sectional view, Figures 10 and 11 are its operation explanatory diagrams,
FIG. 12 is a front view of the pinion, and FIG. 13 is a side view thereof. 1...Support shaft, 2...Number ring, 3...Continuous teeth,
4, 5... Intermittent tooth, 8... Pinion, 13... Position specifying means.

Claims (1)

[Scope of utility model registration request] A plurality of number rings are rotatably provided on the support shaft, a plurality of continuous teeth are formed on the lower digit side of the number ring, intermittent teeth are formed on the upper digit side of the number ring, and intermittent teeth adjacent to the continuous teeth are formed on the upper digit side of the number ring. In a device equipped with a pinion that can mesh simultaneously with the teeth, the width or height of the pinion teeth is changed for each common divisor of the number of teeth of the pinion and the number of successive teeth, and the width or height of the pinion teeth is changed correspondingly. A totalizer comprising position specifying means that is set by changing the tooth width or tooth height of the continuous teeth.