JPS6034840Y2 - unequal pitch gears - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to gear teeth.

Conventionally, when two gears that are located far apart are automatically brought together by bringing the distance between their axes closer together, the two gears are brought closer together in the tangential direction on the same plane and the teeth of the two gears mesh, Alternatively, the teeth of the two gears were meshed by rotating only one gear while bringing the other gear closer in the tangential direction, but according to an experiment, approximately 1 in 0 times the teeth of both gears mesh. The ridges were in contact with each other, causing a meshing problem.

The present invention has been made to provide a gear that does not cause meshing problems in order to solve the problems of the above-mentioned prior art, and the structure and operation thereof will be explained below based on the drawings.

In the gear 1 of the present invention shown in Fig. 1, which has an unequal pitch on the outermost diameter, at least one side of the adjacent teeth is provided with a tooth surface connecting the tooth tip and the tooth bottom in the tooth width direction. By forming inclined surfaces with the same cross-sectional shape,
The tooth tips are chamfered so that the meshing pitch of the gears is equal, but the pitch of the outermost diameter is unequal.

For example, tooth 1a is on the left, tooth 1b is on the right, tooth 1c is on the left,
The right side of the tooth 1d and the left side of the tooth 1e are chamfered by ΔL,
If the outermost diameter pitch of gear 1 before being chamfered is P, then the outermost diameter pitch between teeth 1a and 1b is P-ΔL, and tooth 1b
The outermost diameter pitch between and tooth 1c is P+ΔL, and tooth 1c and tooth 1d.
The outermost diameter pitch between the teeth 1d and 1e is P-ΔL, and the outermost pitch between the teeth 1d and 1e is P+ΔL, so that the outermost pitches are unequal.

FIG. 2 shows a state in which the gear 2 of the present invention and the gear 3 without chamfering are meshed.

In the case of this gear combination in which the gear 2 having uneven pitch teeth and the gear 3 having equal pitch teeth are meshed with each other, the gear 3 is rotated in the tangential direction of the gear 2 (see FIG. 2) while rotating the gear 2 to the left in FIG. When the teeth 2a of the gear 2 and the peaks of the teeth 3a of the gear 3 come into contact with each other at first, causing a meshing problem, but with the next tooth, for example, the tooth 2b of the gear 2 and the gear 3 Since the peaks of the teeth 2b of the gear 2 are chamfered, the pitch of the outermost diameter is different from that of the adjacent teeth, so slipping occurs between the gears 2 and 3. Gear 2 and gear 3 mesh smoothly.

Regarding the method of meshing two gears, as mentioned above, there is a method of rotating only one gear and bringing the other gear closer to the rotating gear from a tangential direction. If the outermost diameter pitch of the gears is unequal like the unequal pitch gear of the present invention, one gear cannot be brought close to the rotating gear in the tangential direction. There is also a method of meshing vertically or at an angle close to it.

In addition, the chamfering method for the tips of teeth is limited to one direction only.
In other words, if only the right side is chamfered, the pitches of the outermost diameters of adjacent teeth will become equal, which is not appropriate.

In other words, in order to make the outermost diameter pitch unequal, chamfering is performed as in this embodiment, or as shown in Fig. 3, chamfering is performed on both sides of the right side 9, on both sides of the left side 9, on the right side, etc.・Do as follows.

As described above, in the present invention, by forming an inclined surface having the same cross-sectional shape in the tooth width direction on at least one side of the adjacent teeth that connects the tooth tip and the tooth bottom, the gear can be improved. Using gears characterized by having equal meshing pitches but unequal outermost diameter pitches, a tooth tip shape having a plurality of outermost diameter portions having a flat surface in the circumferential direction is created. Even when mating gears are to be meshed with each other, they can be easily meshed, and therefore, there is an effect that meshing problems will not occur.

[Brief explanation of drawings]

Figure 1 is a diagram of the main parts of the gear of the present invention, Figure 2 is a diagram showing the gear of the present invention in a state of meshing with a general gear, and Figure 3 is a diagram of the gear of the present invention with chamfering using another method. A diagram of the main parts of the gear is shown. 1...Gear, 2...Gear, 3...
...Gear, la. lb, Icy ld, let 2at 2b
t 3at 3b...teeth.

Claims (1)

[Scope of Claim for Utility Model Registration] An unequal pitch gear that meshes with a mating gear having a tooth tip shape with a flat surface in the circumferential direction of the outermost diameter part, the tooth tip having a tooth tip on at least one side of the adjacent tooth. By forming an inclined surface with the same cross-sectional shape in the tooth width direction on the tooth surface that connects the tooth bottom and the tooth bottom, the outermost diameter pitch of the gear can be maintained evenly while the meshing pitch of the gear is equal. An unequal pitch gear characterized by the following.