JPH0348043A - Coupling gear - Google Patents

Abstract

PURPOSE:To prevent a lip off of the one gear of two gears and to reduce an assembly cost of a coupling gear by a method wherein a brimform flange part protruded sideways is formed on the one surface of at least the other gear. CONSTITUTION:Shafts 2, 3, and 4 are secured to a base body 1 by means of screws 5. Gears 7, 8, and 9 are mounted to the shafts 2, 3, and 4, respectively. The gear 7 is a flange having a flange part 10, and a retaining ring 11 forms a slip-off preventing mechanism. Since a gap is provided between the gears 8 and 9 and the flange part 10, there is no trouble on operation of the gears, and the flange part prevents the occurrence of slip off. This constitution eliminates the need for a retaining ring for other gears and reduces a cost of an assembly process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connecting gear that reduces production costs by simplifying the installation of a gear train.

[Background Art] For example, in facsimile machines, copying machines, and the like, paper feeding operations necessary for operating the machine are performed by the action of a connecting gear that connects a plurality of gears. The gears used in this connection gear are each pivotally supported by a shaft erected on a base, and rotate while being connected to each other. Then, the power generated from the electric motor or the like is transmitted to, for example, a paper feeding mechanism located at the end. In addition, the gear train, which is an assembly of gears, has a groove formed at one end and has a shaft installed upright on the base. After the gear train is inserted in correspondence with the shaft row, a member such as a retaining ring or the like to prevent removal is inserted. It is assembled by being inserted into the groove.

[Problem B to be solved by the invention] However, when attaching gears to a base body using such a method, it is necessary to configure grooves for all the shafts corresponding to the required number of gears, and inevitably it is difficult to support the gears. The number of retaining rings corresponding to the number of shafts, that is, the number of gears, is also required.

Therefore, not only are there multiple steps for forming the connecting gear, but also time is required for assembly, which is a factor that increases production costs.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a connecting gear that can simplify the overall structure by improving the method for attaching the gear to the base body, thereby reducing production costs in the assembly process.

[Means to solve the problem]

In order to achieve the above object, the connecting gear of the present invention has at least two gears, and one of the gears has a flange-shaped flange portion projecting laterally on one side of the gear. It is characterized by being able to prevent the other gear from falling off.

(Function) In the connecting gear of the present invention, the flange gear having the flange portion is rotatably attached to the support shaft while forming a gap corresponding to the width of the gear between the flange portion and the base body. By connecting a flange gear to another gear while making a part of the peripheral edge of the other gear correspond to this gap, the other gear is supported by the flange of the flange gear while the corresponding other shaft is connected. mounted on.

〔Example〕

Embodiments of the connecting gear of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a top view showing how the connecting gear is assembled. When assembling the connecting gear, at a predetermined position on the base 1,
A cylindrical support shaft 2 and another shaft 3.4 as a shaft row are erected perpendicularly to the surface of the base body l. A fixing member such as a screw 5 is used to fix each shaft 2.3.4.
is firmly fixed to the base 1.

Here, each shaft 2.3.4 has a function as a rotating shaft of a gear train, and among these, the support shaft 2 has a function of supporting the entire gear train. That is, a groove 6 is formed on the side surface of the end of the support shaft 2 as a mechanism to prevent the gear train from being removed. In addition, the ends of each shaft 2.3.4 are chamfered to facilitate their insertion during installation.

A gear train is attached to the shaft train that has been completely installed on the base 1. The gear train consists of flange gear 7 and other gears 8
．． 9, and a through hole (not shown) corresponding to the diameter of each shaft 2.3.4 is formed in the center of each gear 7.8.9. Among these, on one side of the flange gear 7, there is a flange portion 10 that supports a part of the peripheral edge of the other gear 8.9.
is formed integrally with the main body of the flange gear 7.

The gear train is attached by first inserting the other gears 8.9. The other gear 8.9 is inserted into the corresponding other shaft 3.4 through its respective through hole, and once this insertion is completed, the other gear 8.9 can be freely rotated. Get status. Then, following completion of the insertion of the other gears 8 and 9, the flange gear 7 is inserted into the support shaft 2 through the through hole.

Here, when the flange gear 7 is inserted into the support shaft 2, the flange portion 10 thereof faces the base body 1 with the main body of the flange gear 7 interposed therebetween. Then, by meshing the teeth of the flange gear 7 with the teeth of the other gear 8.9, each gear 8.9 is integrally connected, forming a series of gear trains that are freely rotatable. .

When the attachment of the gear train to the shaft train is completed, the retaining ring 11 is installed in the groove 6 of the support shaft 2. This retaining ring 11 supports the inner wall of the groove 6 with its three parts, and acts to prevent the flange gear 7 from falling off the support shaft 2. That is, the retaining ring 11 and the groove 6 function as a mechanism to prevent the gear train from being removed.

Next, Figure 2 shows a top view of the assembled gear.
Similarly, FIG. 3 shows a front view. As shown in the figure, a part of the peripheral edge of the other gear 8.9 is simultaneously supported by the gap formed by the flange part 10 of the flange gear 7 and the base body 1, and the other gear 8.9 falling off from the other shafts 3, 4 is effectively prevented. This is the same when the connecting gears are in operation, that is, when each gear 7.8.9 is rotating, the flange portion 10 always supports a part of the peripheral edge of the other gear 8.9, and the connecting gear is The operation takes place without any problems.

Furthermore, the gear train must be mounted with some play between it and the base 1 so that each gear 7, 8, 9 rotates smoothly when the connecting gear is operated. For this reason, at the design stage, the gear width of the other gears 8 and 9 was changed to flange gear 7.
In addition, the length of the support shaft 2 from the base body 1 to the groove 6 is slightly longer than the overall width of the flange gear 7, and the width of the gap between the flange portion 10 and the base body l is determined to be an appropriate width. It is best to decide so that

The connecting gear formed in this manner is supplied with power generated from an electric motor or the like to a part of the gear train, and can be used, for example, in a paper feeding mechanism of a facsimile machine or a copying machine.

Above, one embodiment of a connecting gear has been explained using a connecting gear having three gears as an example, but even when the number of gears ranges from several to more than ten, flange gears and support shafts can be used at key points. If this is installed, the present invention can be similarly applied. Furthermore, the fixation of each shaft to the base body may be achieved by caulking the base side of the shaft, and the gear train removal prevention mechanism may have a function created by a combination of a groove and a retaining ring. For example, other members may be used instead.

〔Effect of the invention〕

As explained above, according to the connecting gear of the present invention, the support of the flange part of the flange gear prevents other gears from falling off, so there is no need to form any grooves on other shafts, and The use of rings is also limited to only the support shaft supporting the flange gear, which can significantly reduce production costs in the assembly process of the connecting gear.

[Brief explanation of drawings]

FIG. 1 is a top view showing how the connecting gear is assembled in an embodiment of the present invention, FIG. 2 is a top view of the connecting gear shown in FIG. 1 when the assembly is completed, and FIG. 3 is the same FIG. 2 is a front view of the connecting gear shown in FIG. 1 upon completion of assembly; 6... Groove, 7... Flange gear, 8.9... Other gear, 10... Flange portion, 11... Retaining ring. Figure 2 Figure 1

Claims (1)

[Claims] It has at least two gears, and one of the gears has a flange-shaped flange formed on one side of the gear that protrudes to the side, so that the flange can prevent the other gear from falling off. Connecting gear.