JPS61175369A - Meshing power transmission parts - Google Patents

Abstract

PURPOSE:To facilitate the incorporation of a gear by forming the projections for guiding the teeth of the gear meshed with onto the side surface of a gear. CONSTITUTION:On the both sides of the edge part in the direction of the tooth trace of each tooth 2 of a gear body 1 having a plurality of tooth parts and bottom parts 3 alternately arranged, the inclined surface 4 on which the tooth width is gradually reduced toward the edge part and the ridge line 5 crossing with the inclined surface 4 are formed. Therefore, even if the tooth is shifted, when the gear body 1 is meshed with other gear by the shifting in the direction of tooth trace, the inclined surface 4 serves for guiding the opponent teeth, and the both gears can be easily meshed with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to interlocking power transmission parts such as gears and racks.

BACKGROUND OF THE INVENTION Recently, automation of assembly work has been progressing in the field of assembling various devices. gear.

Meshing power transmission parts such as racks are also assembled one by one by robots.

Problems to be Solved by the Invention However, since the center of the gear is fitted to the shaft or bearing, if the teeth are not aligned, the sides of the teeth will interfere with the sides of the previously assembled gear or rack. .

Humans would instantly adjust their hands to slightly move the gear in the direction of rotation, but robots cannot do that.

The present invention was made in view of the above points, and an object of the present invention is to develop a meshing power transmission component that can contribute to automation of assembly.

Means for Solving the Problems This invention provides a main body 1 in which a plurality of teeth 2 and troughs 3 are arranged alternately, and a plurality of troughs 3 are arranged on both sides of each tooth 2 toward the end. Slopes 4 whose tooth widths gradually become smaller and ridgelines 5 where these slopes 4 intersect are formed.

Function When assembling such a main body 1 by moving it in the direction of the teeth trace of the tooth 2, even if the centers of the tooth 2 and the tooth 2 of the previously assembled main body 1 do not coincide, the slopes 4 will come into contact with each other. Due to this guiding action, the previously assembled main body 1 moves slightly in the direction in which the teeth 2 are arranged, thereby preventing the side surfaces of the main body 1 from colliding with each other.

Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 to 5. 1 is a circular body. A plurality of teeth 2 and valleys 3 are alternately arranged and formed on the outer periphery of the main body 1. On both sides of one end of these teeth 2 in the tooth trace direction, slopes 4 whose tooth widths gradually become smaller toward the ends and ridgelines 5 where these slopes 4 intersect are formed. The slope 4 bounded by the ridgeline 5 reaches closer to the center of the main body 1 than the bottom of the valley 3.

Therefore, the straight line 6 that intersects at the hem of the slope 4 is the trough 3.
It is formed from the center of one end toward the side surface of the main body 1.

The angle θ at which the side surface of the main body 1 intersects with the striation 6 is set to 45°. Furthermore, one side of the main body 1 has a ridge line 5 and a stripe 6.
A straight ridge line 7 connecting one end of the tooth 2 is formed, and a chamfer 8 and a shaft hole 9 are formed on the outer periphery of one end of the tooth 2, thereby forming a gear G.

In such a configuration, as shown in FIG. 5, the shaft hole 9 of the gear G is fitted into the shaft 11 erected on the frame 1o of a certain kind of equipment. Although not shown, this assembly is carried out by gripping the gear G with a robot hand. In FIG. 5, the right gear G is fitted to the shaft 11 from behind the left gear G, but
Even if the centers of the teeth 2 and the troughs 3 of the two gears G are misaligned,
Due to the component force generated when the slopes 4 of the two gears G come into contact with each other, the previously assembled left gear G moves slightly around the shaft 11, thereby smoothly performing the meshing operation. Moreover, by forming the ridge line 5, the length of the slope 4 can be increased, and the guiding action for positioning can be performed very effectively. Therefore, even during automatic assembly, the sides of the gears G will not collide with each other and will not interfere with the assembly work.

Note that the gear G is prevented from moving in the thrust direction by fixing the stopper 12 to the shaft 11.

Next, a second embodiment of the present invention will be explained based on FIG. 6. The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, a rack R is constructed by forming teeth 2, troughs 3, slopes 4, ridges 5, lines 6°, ridges 7, and chamfers 8 on an elongated main body 13.

Therefore, although the rack R is assembled in combination with the gear G of the above embodiment, the frame 1 is guided by the guiding action based on the contact between the slopes 4 as in the above embodiment.
If the gear assembled at 0 first is gear G, then that gear G
If the rack R moves slightly in the rotational direction, the rack R will move slightly in the linear direction. In any case, the sides of gear G and rack R will not collide, and the problem of automated assembly will be eliminated.

Effects of the Invention Since the present invention is constructed as described above, when the main body is moved in the direction of the tooth line and assembled, even if the centers of the tooth and the valley of the previously assembled main body do not match, the slope The previously assembled main body moves slightly in the direction of tooth arrangement due to the guiding action of the comrades coming into contact with each other.

It can prevent the sides of the main body from hitting each other,
Moreover, by forming the ridgeline, the length of the slope can be increased, and the guiding action for positioning can be performed extremely effectively.
Therefore, it has the effect of promoting automation of assembly by robots.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is a front view and FIG. 2 is an A-A in FIG. 1.
3 is a partial plan view, FIG. 4 is a partially cutaway and enlarged perspective view, and FIG. 5 is a side view showing the assembly process in a reduced scale. FIG. 6 is a partially enlarged perspective view showing a second embodiment of the present invention. 1...Body, 2...Tooth, 3...Trough, 4...Slope, 5...Ridge line

Claims (1)

[Claims] A main body in which a plurality of teeth protruding on a circular arc or on a straight line and troughs are arranged alternately, and on both sides of each tooth in the tooth trace direction, a slope whose tooth width gradually decreases toward the end. and a ridgeline where these slopes intersect.