JP2000346086A - Rotary shaft connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To complete a work in an extremely short time. SOLUTION: Rotary shafts 10, 20 are engaged with each other in rugged connection manner through uneven engaging structures such as a flat plate-like projected part 11 and a groove-like recessed part 12 formed on the end faces of the rotary shafts 10, 20 so that they are easily separatable, but the connecting portion of these rotaty shafts is covered with a cylindrical collar 30 so that the rotary shafts cannot be disconnected when they are not required, and thus the rotary shafts can be extremely easily connected or disconnected simply by shifting the collar 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating shaft connecting structure.

[0002]

2. Description of the Related Art Heretofore, this type shown in FIGS. 10 to 13 is known. 10 and 11 show a split cylinder type using a key, in which key grooves 1a1 and 1b1 are formed on the side surfaces near the end faces of the rotating shafts 1a and 1b, and the key 2 is mounted. It is sandwiched between the split cylinders 3a and 3b from the outside. A key groove 3 corresponding to the key 2 is provided on the inner peripheral surface of the split cylinder 3a.
a1 is formed, and each split cylinder 3a, 3b is fastened with a plurality of bolts 4.

In FIGS. 12 and 13, a cylindrical inner ring 6 having a wedge-shaped cross section and having elasticity is mounted on a connecting portion of two rotating shafts 5a and 5b, and a cylindrical inner ring is provided on the outer peripheral side. Wedge-shaped side rings 8a and 8b are inserted into gaps on both sides while the outer ring 7 is mounted. One side ring 8a has a through hole 8a1 for the bolt 9, and the other side ring 8b has a female screw hole 8b1 into which the bolt 9 is screwed. Therefore, when the two side rings 8a and 8b are tightened so as to be close to each other with the bolt 9, the two rotating shafts 5a and 5b are connected to each other by the action of the two wedges.

[0004]

In the above-described conventional rotary shaft connecting structure, in any case, a plurality of bolts must be removed at the time of connecting and removing, and when it is desired to finish the operation in a short time. Was disadvantageous. The present invention has been made in view of the above problems, and an object of the present invention is to provide a rotating shaft coupling structure capable of completing an operation in an extremely short time.

[0005]

According to a first aspect of the present invention, there is provided a rotating shaft connecting structure for connecting a pair of rotating shafts to each other to transmit a rotating force. The coupling end has a concave-convex engagement structure that makes it impossible to rotate relative to each other when abutting, and a collar that penetrates through the same rotation shaft and slides at the time of the concave-convex engagement to cover the outer peripheral side of the coupling portion. In order to hold the collar at the connecting portion, the stopper is provided so as not to slide.

In the invention according to claim 1 configured as described above, by the concave and convex engagement structure provided at the connecting end of each rotating shaft, the two cannot rotate relative to each other only by bringing the rotating shafts into contact. . In addition, after the concave and convex engagement, when the collar mounted through the rotating shaft is slid to cover the outer peripheral side of the connection portion, each rotating shaft does not shift outward, and furthermore, the stopper is used. By holding the collar at the connection site, the stopper cannot slide and cannot be separated from the connection site.

That is, the rotating shafts are engaged with each other in an uneven shape and can be easily detached, but the connecting portion is covered with a cylindrical collar so as not to come off when unnecessary. Therefore, connection and disconnection can be performed very easily only by shifting the collar. According to a second aspect of the present invention, in the rotary shaft coupling structure according to the first aspect, the concave-convex engaging structure has a groove in which one has a flat plate-like convex portion and the other has the same convex portion inserted therein. The configuration is such that a concave portion is formed.

In the invention according to claim 2 configured as described above, a groove-shaped concave portion is formed on one of the rotating shafts, and a flat plate-shaped convex portion is formed on the other. If the protrusion is slid and inserted from the opening on the side surface of the recess having the groove shape, the connection can be performed without moving the rotating shaft in the length direction. In this case, the groove-shaped concave portion receives a force in the opening direction when transmitting the rotational force, but the outward deformation is restricted by the collar and is not easily deformed.

Further, according to a third aspect of the present invention, in the rotary shaft coupling structure according to the first aspect, the concave / convex engaging structure forms a convex portion having a uniform cross section in the axial direction on one side and the other on the other side. Is formed by forming a concave portion having a substantially equal cross section into which the convex portion can be inserted. In the invention according to claim 3 configured as described above, the convex portion and the concave portion basically have the same cross section in the axial direction, and the convex portion is inserted into and engaged with the concave portion, so that the side of the concave portion is opened. Never.

Further, the invention according to claim 4 is a rotary shaft connecting structure for connecting a pair of rotary shafts to each other to transmit a rotational force, wherein the concave and convex engagement for connecting the end surfaces of the rotary shafts so that they cannot rotate. The structure includes a collar that slides while surrounding the engaging portion from outside while forming a structure, and a stopper that holds the collar at the engaging portion. In the invention according to claim 4 configured as described above, even if it is not a definite shape such as which is convex and which is concave, uneven engagement is performed so that the end faces cannot rotate. Since the engagement portion is stopped by the stopper while being slid from the outside so as to be surrounded by the collar, the connection and detachment can be performed very easily.

Further, the invention according to claim 5 is a rotating shaft connecting structure for connecting a pair of rotating shafts to each other to transmit a rotating force, wherein the end surface of the rotating shaft has an uneven surface which is asymmetric with respect to the rotating direction. A coupling member having a concave-convex engagement that forms a shape, and is non-rotatably coupled to the both end surfaces while entering a gap generated when both end surfaces face each other, and an engagement portion between the coupling member and each rotation shaft. The structure includes a collar that can be slid so as to surround it from the outside and a stopper that holds the collar at the engagement site.

According to the fifth aspect of the present invention, the connecting member is inserted between the end faces of the rotating shaft, and the two are non-rotatably engaged with each other. Furthermore, since the collar is slid from the outside to the engagement portion between the connecting member and each rotation shaft, the engagement portion does not come off, and the collar itself is held at the engagement portion by the stopper. Further, the invention according to claim 6 is based on claim 5
Wherein the concave portion is formed on the side of the connecting member, and the convex portion is formed on the side of the rotary shaft.

According to the sixth aspect of the present invention, since the side of the concave portion is difficult to open because it is originally regulated by the collar, if the side of the connecting member is slightly opened to form a gap, By replacing only the members, it is possible to continue using both rotating shafts as they are.

[0014]

As described above, according to the present invention, since the collar is merely slid to the connecting portion while the end faces of the rotating shaft are engaged with each other, the attaching and detaching operation of the rotating shaft can be made extremely easy. Structure can be provided.

According to the second aspect of the present invention, since the groove-shaped concave portion that opens in the lateral direction is formed on one of the rotating shafts, a flat convex portion can be inserted from the side. This is convenient when it is difficult to move in the length direction. Furthermore, according to the third aspect of the present invention, since the convex portion having a cross-sectional structure that is continuous in the axial direction is inserted into the concave portion, the side of the concave portion can be hardly opened. Further, according to the invention of claim 4, it is possible to form a free uneven shape between the end faces of the rotating shaft, and it is possible to improve the degree of freedom of the shape of the engaging surface.

Further, according to the invention of claim 5,
Since the connecting member is inserted and engaged between the connecting members, the degree of freedom of the shape of the engaging surface can be improved. Further, since the connecting member can be replaced as a consumable item, it is easy to protect the rotating shaft by making the connecting member fragile. Furthermore, if several lengths of the connecting member are prepared, it is possible to improve the degree of freedom of the dimensional application location. Furthermore, according to the invention according to claim 6, the connection member can be easily replaced when it is opened by forming the connection member into a recess that is easy to open.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a rotary shaft connecting structure according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a connecting state. In FIG. 1, a flat convex portion 11 having a substantially rectangular cross section is formed by shaving both side surfaces on an end surface of a rotating shaft 10.
A groove-shaped concave portion 21 having a width into which the flat-plate-shaped convex portion 11 can be inserted is formed on the end face of the zero. This groove-shaped concave portion 21 is
Even when the rotation shafts 10 and 20 are close enough to be in contact with each other, if the rotation angles are the same, the plate-shaped projection 11 can be opened to the side of the groove-shaped recess 21. It can be inserted by sliding from the part.

The inner diameter of the collar 30 is substantially equal to the outer diameter of the rotating shafts 10 and 20.
It penetrates either 0 or 20. When the rotating shafts 10 and 20 are connected to each other, the collar 30 is slid so as to cover the connecting portion. Are formed, and are engaged with the grooves 12, 22 to restrict the movement of the collar.
A ring 40 is provided.

That is, as shown in FIG.
After connecting the plate-shaped convex portion 11 and the groove-shaped concave portion 21 in 20 by engaging and recessing engagement, the collar 30 is slid to cover the connection portion. In this way, the connection portion is covered with the collar 30 because, in part, the plate-like protrusion 11 is formed by the groove-like recess 21.
In order to prevent it from coming off from the side opening. As shown in FIG. 3, when it is attempted to transmit a rotational driving force at the concave / convex engagement portion between the flat convex portion 11 and the groove concave portion 21, as shown in FIG.
Acts so as to open outward from the inside of the groove-shaped recess 21, but the groove-shaped recess 21 does not open outward because the collar 30 is on the outside while being in close contact. Therefore, despite this simple configuration, the rotational driving force is reliably transmitted, and furthermore, the connecting portion is not deformed.

Then, when the collar 30 is moved to a predetermined position, the E-rings 40, 40 are mounted in the grooves 12, 22 to serve as stoppers. In the above-described embodiment, the concavo-convex engagement structure is constituted by the plate-shaped convex portion 11 and the groove-shaped concave portion 21, but various modifications are possible. FIG. 4 and FIG. 5 show an example thereof. Two short cylindrical projections 111 are formed on the end face of one rotating shaft 110, and the other rotating shaft 120 is formed.
Are formed with two circular concave portions 121 into which the short columnar convex portions 111 can be inserted. These short columnar projections 11
1 and the circular recess 121 have substantially the same cross section in the axial direction.
The short columnar convex portions 111 face each other and are
When they are inserted into both, they are engaged with the concave and convex.

In this case, the entire circumference of the short columnar convex portion 111 is covered by the circular concave portion 121, and the peripheral surface of the circular concave portion 121 is closed. It has the effect of being difficult to open. Further, an annular groove 112 is formed only on the rotation shaft 110 side as a stopper, and three notches 131 corresponding to the three convex portions 141 of the E-ring 140 are formed on the collar 130. Therefore, the collar 130 is held at the position where the notch 131 faces the groove 112 and the E-ring 140 is held.
Attach. Then, the three protrusions 141 enter the groove 112 through the three notches 131, and the collar 130 is connected to the rotation shaft 110 through the E-ring 140.
Can be fixed. It should be noted that since the force for moving the collar 130 in the axial direction does not act on the collar 130, the collar 130 does not come off even with this degree of engagement and fixing.

As another embodiment of the concavo-convex engagement structure, a structure shown in FIG. 6 is also possible. In this embodiment, convex portions 211 and 221 are formed at substantially equal intervals near the outer periphery of the end surfaces of the rotating shafts 210 and 220. At the same time, a concave portion is formed between the convex portions 211 and 221. Become. In this way, the rotation shafts 210 and 220 have commonality,
It is not always necessary to properly use one side on the male side and the other side on the female side.

Also, as shown in FIG.
If 1 is cylindrical, the gap can be sewn and inserted into the recess without strictly matching the directions.
Both can be engaged without moving the shaft 320 in the axial direction. In the above embodiment, one rotating shaft is directly connected to the other rotating shaft. However, a configuration in which a connecting member 450 is interposed therebetween as shown in FIG.

In the example shown in FIG.
Flat end portions 411 and 421 are formed on both end surfaces, and groove end portions 451 are formed on both end surfaces of the connecting member 450 therebetween.
Is formed. Although the groove-shaped recess is difficult to open by attaching the collar, it may be opened little by little. In such a case, only the connecting member 450 needs to be replaced. In addition, if used for many years, the concave and convex engaging portion may be deformed. In such a case, if the connecting member 450 is formed of a slightly softer material than the rotating shafts 410 and 420, the rotating shafts 410 and 420 are less likely to be deformed, and only the connecting member 450 needs to be replaced as appropriate. .

Further, in the example shown in FIG.
The middle of 0 is formed slightly narrower. This is to prevent the middle part from being broken in an emergency to break other parts. In this case, even if the intermediate portion is broken, both rotating shafts 410 and 420 are provided via the collar 430.
Since the shaft can be rotated without displacement of the axis, it is possible to prevent the secondary shaft from being damaged even if the connection in the rotation direction is broken.

In this example, a split pin 460 is used as a stopper, and a through hole is formed in the collar 430 and the rotating shaft 410. At the time of fixing, the collar 430 and the through hole of the rotating shaft 410 are aligned, and the split pin 460 is
Insert and bend the end. Thus, the rotating shaft 1
Flat plate-shaped convex portions 11 and groove-shaped concave portions 2 formed on the end faces of 0, 20
1, the rotating shafts 10, 20
Although they can be easily attached and detached because they engage with each other in an uneven shape, the connecting part is covered with a cylindrical collar 30 so that they do not come off when not needed, and it is extremely easy to connect as long as the collar 30 is shifted It can be removed or removed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rotation shaft connection structure according to an embodiment of the present invention.

FIG. 2 is a sectional view of a connection state of the rotation shaft connection structure.

FIG. 3 is a cross-sectional view showing how a force is applied to the rotation shaft connection structure.

FIG. 4 is a perspective view of a rotation shaft connection structure according to a modification.

FIG. 5 is a cross-sectional view of a connection state of the rotation shaft connection structure.

FIG. 6 is a perspective view of a rotation shaft coupling structure according to another modification.

FIG. 7 is an operation explanatory diagram when a part is deformed.

FIG. 8 is a perspective view of a rotation shaft coupling structure according to another modification.

FIG. 9 is a perspective view of a partially modified connecting member.

FIG. 10 is a perspective view of a conventional rotating shaft coupling structure.

FIG. 11 is a cross-sectional view of a connection state of the rotation shaft connection structure.

FIG. 12 is a perspective view of another conventional rotating shaft coupling structure.

FIG. 13 is a partially broken perspective view of a connection state of the rotation shaft connection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Rotating shaft 11 ... Plate-shaped convex part 12 ... Groove 20 ... Rotating shaft 21 ... Width groove-shaped recessed part 22 ... Groove 30 ... Collar 40 ... E-ring 110 ... Rotating shaft 111 ... Short cylindrical convex part 112 ... Groove 120 ... Rotating shaft 121 ... Circular recess 130 ... Collar 131 ... Notch 140 ... E-ring 141 ... Protrusion 210,220 ... Rotation shaft 211,221 ... Protrusion 310,320 ... Rotation shaft 311,321 ... Protrusion 410,420 ... Rotation Shafts 411, 421 Plate-shaped protrusion 430 Collar 450 Connection member 451 Groove-shaped recess 460 Split pin 1a, 1b Rotary shaft 1a1, 1b1 Key groove 1c Key 2a, 2b Split cylinder 2a1 Key groove 3a: a plurality of bolts 3b: a and nuts 4a, 4b: rotating shaft 5: inner ring 6: outer ring 7a: side rings 7a, 7b: side rings 7a1: through-hole 7b: si Dring 7b1 ... female screw hole 8 ... bolt

Claims (6)

[Claims] 1. A rotating shaft connecting structure in which a pair of rotating shafts are connected to each other to transmit a rotational force, and a concavo-convex engaging structure in which the connecting ends of the respective rotating shafts cannot rotate relative to each other when they come into contact with each other. A collar that penetrates the rotary shaft and slides at the time of engaging the concave and convex to cover the outer peripheral side of the connecting portion; and a stopper that disables sliding to hold the collar at the connecting portion. A rotating shaft coupling structure, characterized in that: 2. The rotating shaft coupling structure according to claim 1, wherein one of the concave-convex engaging structures has a plate-shaped convex portion and the other has a groove-shaped concave portion into which the convex portion can be inserted. A rotating shaft coupling structure characterized by what is to be done. 3. The rotating shaft connecting structure according to claim 1, wherein the concave-convex engaging structure forms a convex portion having an equal cross section in the axial direction on one side, and the convex portion can be inserted on the other side. A rotating shaft connecting structure, wherein a concave portion having a substantially equal cross section is formed. 4. A rotating shaft connecting structure for connecting a pair of rotating shafts to each other to transmit a rotating force, wherein a concavo-convex engagement structure for connecting end surfaces of the rotating shafts so that they cannot rotate is formed.
A rotating shaft coupling structure comprising: a collar slidable while surrounding the engaging portion from the outside; and a stopper for holding the collar at the engaging portion. 5. A rotary shaft connecting structure for connecting a pair of rotary shafts to each other to transmit a rotational force, wherein an end surface of the rotary shaft has an asymmetrical uneven shape with respect to a rotation direction, and both end surfaces. A coupling member having a concave and convex engagement that is non-rotatably coupled to the opposite end surfaces while entering a gap generated when facing each other, and is slidable so as to surround an engagement portion between the coupling member and each rotation shaft from outside. And a stopper for holding the collar at an engagement portion. 6. The rotating shaft connecting structure according to claim 5, wherein a concave portion is formed on the connecting member side and a convex portion is formed on the rotating shaft side.