JPH04102720A - Parallel key - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a parallel key that is press-fitted into a key groove of a rotation drive shaft and a key groove of a rotation driven shaft to connect the rotation drive shaft and the rotation driven shaft. The purpose of the present invention is to provide a parallel key that can connect a dynamic drive shaft and a rotation driven shaft easily and without any play, as well as easily release this connection. Regarding a parallel key that is press-fitted into a key groove and connects a rotational drive shaft and a rotational driven shaft, the intermediate area in the press-fitting direction of one side surface that is press-contacted to the inner surface of each key groove is made convex, and Both end regions in the press-fitting direction of the other side surface pressed against the inner surface of each of the key grooves are made convex to form a parallel key.

[Industrial application field]

The present invention relates to a parallel key, and particularly to a parallel key that can easily connect a rotational drive shaft and a rotational driven shaft without any play (hereinafter referred to as backlash), and can easily release this connection.

For devices that have a rotating drive shaft and a rotating driven shaft connected by a parallel key, the rotating driving shaft and rotating driven shaft must be disconnected and reconnected during maintenance and repair. There are also quite a few.

Therefore, it is possible to connect the rotary drive shaft and the rotary driven shaft easily and without any wobbling, and it also makes it easy to release the connection, which facilitates maintenance and repair work on the device. There is a strong need for parallel keys to simplify assembly of the device.

[Conventional technology]

Next, a conventional parallel key will be explained with reference to FIG.

FIG. 2 is a diagram for explaining the conventional parallel gear, in which (a) is a plan view of the parallel key, (b) is a front view of the parallel key, and (e) is a front view of the parallel key. is a sectional side view of the main part of the rotating drive shaft with a parallel key inserted into the key groove, (d) is a sectional side view of the main part of the rotating driven shaft, (e) is a sectional view taken along line AA, (
f) is a sectional view taken along the line B-B, FIG.

In addition, the same symbols are given to the same parts and materials throughout the drawings.

Conventional parallel keys are made of metal such as iron, and have an elongated columnar shape as shown in Figures (a) and (b), and the cross section perpendicular to the long axis is constant ( Seven were formed.

As shown in Figures (g) and (G), the rotation drive shaft 11 and rotation driven shaft 12 are connected by the parallel key 10, as shown in Figures (d) and (G). Move the rotary driven shaft 12 shown in f) in the direction of the arrow 2, and press the parallel key 10 into the key groove 11a of the rotary drive shaft 11 shown in FIGS. Key groove 12 of rotation driven shaft 12
It was press-fitted into a.

[Problem to be solved by the invention]

However, the parallel key 10 is inserted into the key groove 1 of the rotation driven shaft 12.
A large force was required to press fit into 2a.

In particular, when the cross-sectional dimensions of the parallel key 10 are 5 x 5 mm or more and the length is 20 mm or more, the press-fitting becomes an extremely difficult task.

Moreover, it is extremely difficult to disconnect the rotary drive shaft 11 and the rotary driven shaft 12 during maintenance or repair of the device or the like.

The present invention was made to solve these problems, and its purpose is to simply connect a rotating drive shaft and a rotating driven shaft without any play! Another advantage is to provide a parallel key that can easily release this connection.

[Means for Solving the Problem] As shown in FIG. In the parallel key 20 that connects the key grooves 11a and the rotation driven shaft 12, an intermediate region in the press-fitting direction of one side surface that is pressed against the inner surface of the key grooves 11a and 12a is formed as a convex surface 20a, and the key grooves 11a and 12a are This is achieved with a parallel key characterized in that both end regions in the press-fitting direction of the other side surface that is pressed against the inner surface of the key are formed as convex surfaces 20b.

[Function] In the parallel key of the present invention, the intermediate region in the press-fitting direction of one side surface that presses against the inner surfaces of the key grooves 11a and 12a is formed into a convex surface 2.
0a, and both end regions of the other side surface in the press-fitting direction are made convex surfaces 201].

Therefore, the parallel key 20 is inserted into the key groove 12 of the rotation driven shaft 12.
A small contact area with the inner surface of key groove 1
A space is formed between the inner surfaces of the parallel key 20 and the key grooves 12a in which the parallel key 20 and the side surfaces of the key grooves 11a and 12a can be elastically deformed when the parallel key 20 is press-fitted into the parallel key 2a.

As a result, the parallel key 20 can be press-fitted into the key groove 12a with a small force.

Moreover, the parallel key 20 has one convex surface 20b provided in the middle area of one side surface and both end areas of the other side surface. Since the two provided convex surfaces 20b are pressed against the inner surfaces of the key grooves 11a and 12a to connect the rotary drive shaft 11 and the rotary driven shaft 12, the rotary drive shaft 11 and the rotary It will be connected to the driven shaft 12 without any play.

〔Example〕

Hereinafter, a parallel key according to an embodiment of the present invention will be explained with reference to FIG.

FIG. 1 is a diagram for explaining a parallel key according to an embodiment of the present invention, and FIG. 1(a) is a plan view of the parallel key, and FIG.
b) is a front view of the parallel key, (c) is a plan view of the parallel key fitted into the key hole of the rotation drive shaft, and (d) is
A cross-sectional view taken along the line A, and FIG. 10E and FIG.

The parallel key according to an embodiment of the present invention is made of metal, for example, iron, and its shape is shown in FIG.
As shown in FIG. 2, the intermediate region in the press-fitting direction of one side surface that presses into contact with the inner surface of the key grooves 11a and 12a of the rotary drive shaft 11 and the rotary driven shaft 12 is made into a convex surface 20a, and the other side surface is made into a convex surface 20a in the press-fitting direction. Both end regions are made into convex surfaces 20b.

As shown in FIG. 2C and FIG. This is done by connecting the dynamic drive shaft 11 and the rotation driven shaft 12.

That is, the parallel key 20 is inserted into the key groove 1 of the rotation driven shaft 12.
2a, one convex surface 20a of the parallel key 200
Only the two convex surfaces 20b are the key groove 1 of the rotation driven shaft 12.
2a, and a space S is formed between the parallel key 20 and the inner surface of the key groove 12a, so that the parallel key 20
When press-fitting the parallel key 20 into the key groove 12a, the inner surfaces of the parallel key 20 and the key grooves 11a and 12a can be elastically deformed easily, and even with a small force, the parallel key 20 can be pressed into the key groove 12a.
This means that it can be press-fitted into the

In this way, the parallel key 20 according to an embodiment of the present invention not only simplifies the connection between the rotary drive shaft 11 and the rotary driven shaft 12, but also facilitates the connection between the rotary drive shaft 11 and the rotary driven shaft 12. This also makes it easier to release the .

Further, the parallel key 20 has one convex surface 20a provided in the middle region of one side surface, and two convex surfaces 20a provided in both end regions of the other side surface.
Since the two convex surfaces 20b press against the inner surfaces of the key grooves 11a and 12a and connect the rotary drive shaft 11 and the rotary driven shaft 12, the rotary drive shaft 11 and the rotary driven shaft 12 are It will be connected without any looseness.

Note that even if the parallel key 21 is constructed by making the middle area of one side surface a convex surface as shown in FIG. 2(e), or by making one surface a convex curved surface as shown in FIG. parallel key 2
2, it goes without saying that the same functions and effects as the parallel key 20 of the embodiment of the present invention described above can be obtained.

[Effects of the Invention] As is clear from the above description, according to the present invention, the rotary drive shaft and the rotary driven shaft can be connected easily and without backlash, and this connection can be easily released. Keys can be provided.

Therefore, in a device where it is necessary to connect a rotary drive shaft and a rotary driven shaft, if the parallel key of the present invention is used to connect the rotary drive shaft and the rotary driven shaft, assembly of the device will be easy. This makes maintenance and repair extremely easy.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining a parallel key according to an embodiment of the present invention, and FIG. 2 is a diagram for explaining a conventional parallel key. In the figure, 10 denotes a parallel key 11 as a rotary drive shaft, 11a as a key groove on the rotary drive shaft, 12 as a rotary driven shaft, 12a as a key groove on the rotary driven shaft, and 20 as a parallel key 20a according to the present invention. and 20b indicate convex surfaces, respectively. (Q+ -? -f key A pregnant and 1st page ηh +bt Jl Ue GL city 7121 fc 1 time?p snoring 11th axis □Kimiko゛l insert the flat key self-plane mη ,;￥*Journey of invention Xiao Ping Yi Ding key ti! RU million t mailbox〇Figure 12] f (11 Ping q': f generation - ＾ Ping T Encircle+b) Ping f'T~61M1K1 9) Ren paddy Company style 1 not (jutsu 1 danme sensozan + C-C massage analysis tsugoriguchi 1 key E translation C correction L ha hei diagram @ 2vA

Claims (1)

[Claims] Press-fitted into the key groove (11a) of the rotation drive shaft (11) and the key groove (12a) of the rotation driven shaft (12), the rotation drive shaft (11) and the rotation driven shaft In the parallel key (20) connected to the shaft (12), an intermediate region in the press-fitting direction of one side surface that is pressed against the inner surface of the key groove (11a, 12a) is formed as a convex surface (20a), and A parallel key characterized in that both end regions in the press-fitting direction of the other side surface pressed against the inner surface of the key groove (11a, 12a) are formed into convex surfaces (20b).