JP2548176Y2 - Unit type coupling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a unit-type coupling used for a connecting portion that transmits rotation of a drive shaft to a driven shaft.

[Conventional technology]

Generally, in the path of the power shaft system transmitting the rotational driving force,
For example, a connection for transmitting power to the coupling via a gear is often provided.

As a conventional method of transmitting power by the coupling, for example, as shown in FIG. 4, an intermediate shaft 22 connected to a gear 20 for transmitting a rotational driving force and supported by a bearing 21 is connected to a coupling 23, A method of transmitting a rotational driving force to the driven shaft 24 via the coupling 23 is generally performed.

[Problems to be solved by the invention]

However, since the power transmission mechanism uses the intermediate shaft 22, the axial length from the input gear to the output shaft increases. For this reason, when such a power transmission mechanism is incorporated in equipment, the entire device becomes longer and the weight becomes heavier.

In addition, a key is required to connect the gear 20 and the coupling 23 with the intermediate shaft 22, so that the number of parts is large, and there is a disadvantage that assembling is troublesome.

This invention has been made in view of the state of the art of the conventional shaft coupling described above, and its purpose is to use gears, sprockets,
Various types of external power transmission parts, such as pulleys, are coupled to the coupling holes provided at one end of the external power transmission parts to make them unitized, making the overall length short and compact, and making the coupling members common parts. It is an object of the present invention to provide a unit-type coupling with a reduced number of points.

[Means for solving the problem]

Therefore, in the present invention, as a means for solving the above-mentioned problem, an external power transmission unit having a power transmission wheel such as a gear for transmitting external transmission power on an outer diameter surface and having a fitting hole at one end thereof, A coupling having a universal joint for connecting a rotary shaft to the inside of which the diameter portion is fitted in the fitting hole, wherein the coupling has an axially concave portion or a convex portion on its outer diameter portion. The external power transmission portion is provided with a convex portion or a concave portion in the inner diameter portion thereof in the axial direction, and power is transmitted by freely fitting the coupling and the concave / convex portion of the external power transmission portion. The configuration of a unit-type coupling configured to be able to be used was adopted.

[Action]

The unit type coupling of the present invention configured as described above, the external power is directly transmitted from the external power transmission unit to the coupling unit by fitting the coupling unit integrally into the fitting hole provided in the external power transmission unit. And transmitted to the rotating shaft of the coupling unit.

The coupling unit is integrated in the rotational direction via an uneven portion provided between the coupling unit and the external power transmission unit.
In the coupling unit, power is transmitted to a universal joint provided inside the coupling unit and to a rotating shaft connected to the universal joint.

The above makes the overall length short and compact.
Regardless of the type of the external power transmission unit, a coupling unit having the same shape can be used, and the whole can be unitized.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a unit type coupling of this embodiment.

Reference numeral 1 denotes an external power transmission unit, and power is transmitted from the outside by a gear meshing with the gear 2. At one end thereof, a fitting hole 3 is provided, into which a coupling member 4 is fitted. A convex portion 5 provided on the inner surface of the fitting hole 3 and a concave portion 6 provided on the coupling member 4 are provided. Are provided in three places in the illustrated example, and are fitted to each other so that the external power transmission unit 1 and the coupling member 4 are integrated with each other for rotational operation.

The coupling member 4 has an annular space 7 formed therein, for example, a second space.
As shown in the figure, a universal joint is provided in which three ball grooves 9 are provided at equal intervals, and three balls 11 are held in pockets 10 provided in a retainer 8 fitted in the gap 7. I have.

The ball 11 and the retainer 8 fitted into the gap 7 are prevented from falling off in the end of the fitting hole 3 so as not to fall off in the axial direction.
Is provided. Reference numeral 13 denotes a rotating shaft following the retainer 8.

FIG. 3 is an exploded perspective view of the unit-type coupling, in which an external power transmission unit 1, a coupling member 4, and a stopper 12 are shown as main components.

The convex portion 5 of the fitting hole 3 and the coupling member 4
Conversely, the concave portion 6 may have a concave portion 5 'in the fitting hole 3 and a convex portion 6' (not shown) in the coupling member 4. The gear 2 is provided as a torque transmission wheel, and may be a sprocket or a pulley.

In the unit type coupling configured as described above, external power is transmitted from the torque transmitting wheel of the gear 2, the coupling member 4 fitted in the fitting hole 3 is rotated, and the rotating shaft 13 Power is transmitted to.

Since the inner diameter of the fitting hole is determined by the maximum torque of the shaft power, it can be standardized in several steps depending on the magnitude of the torque. Therefore, if the type of the external power transmission unit 1 is a gear,
Whether the sprocket or the pulley is provided with a fitting hole 3 of a predetermined shape determined by the magnitude of the torque in the external power transmission unit 1, the coupling member 4 can be commonly used and unitized. be able to.

In addition, since the coupling member 4 is directly connected to the fitting hole 3 in the external power transmission unit 1, the axial length of the torque transmission system using the coupling can be made short and compact, and the external power transmission unit 1 can be made compact. The transmitting portion 1 and the coupling member 4 are provided with an uneven portion or an uneven portion 5, 6 or 5 ',
Since they are integrated by 6 ', a key for connection is unnecessary, and the number of parts can be reduced.

〔effect〕

As described in detail above, in the present invention, the external power transmission unit and the coupling member having the universal shaft joint inside are integrally fitted into the fitting hole of the external power transmission unit, so that the number of parts is small. The overall length can be made short and compact, the fitting hole diameter determined by the magnitude of the transmission torque is standardized in several steps, and within each torque range, the coupling member is used in common and made into a common part and unitized. Accordingly, various advantages can be obtained in that the cost can be reduced, and when a force does not act in the axial direction, it can be easily attached to and detached from the fitting hole at the fitting portion.

[Brief description of the drawings]

FIG. 1 is a main longitudinal sectional view of the unit type coupling according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is an exploded perspective view of the unit type coupling, FIG.
FIG. 1 is an overall layout view of a conventional coupling device. 1 ... external power transmission unit, 2 ... gear, 3 ... fitting hole, 4
... coupling member, 5 ... convex part, 6 ... concave part,
7: air gap, 8: cage, 9: ball groove, 10: pocket, 11: ball, 12: retaining, 13: rotating shaft.

Claims (1)

(57) [Scope of request for utility model registration] An external power transmission portion having a power transmission wheel such as a gear for transmitting external transmission power on an outer diameter surface and having a fitting hole at one end thereof, and an outer diameter portion fitted into the fitting hole. A coupling having a universal joint for connecting to a rotating shaft on the inside, the coupling having an axially concave portion or a convex portion on an outer diameter portion thereof, and the external power transmission portion having An axially convex portion or a concave portion is provided in the inner diameter portion, and the coupling and the concave and convex portion or the concave and convex portion of the external power transmission portion are fitted so that power can be transmitted. Unit-type coupling.