JP2002310198A - One-way clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a one-way clutch with great strength, simply productive and reductive in size. SOLUTION: The one-way clutch comprises a rotating shaft, a casing for supporting the rotating shaft, and a clutch mechanism c provided in the casing, the clutch mechanism c having a shaft to slide in the casing when rotated to one side and to be precluded from sliding when rotated to the other side. The casing 22 composed of a bottom plate member 23a and a plurality of intermediate plate members 23b layered on each other has a press-in recessed portion 31 formed over the whole periphery on one face and a press-in protruded portion 32 formed on the other face corresponding to the press-in recessed portion and pressed therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way clutch in which when a rotating shaft rotates in one direction, the rotating shaft slides in a casing, and when the rotating shaft rotates in the other direction, the casing also rotates integrally.

[0002]

2. Description of the Related Art FIG. 9 is a view showing the entire structure of a conventional one-way clutch, and FIG. 10 is a sectional view of the conventional one-way clutch. As shown in FIGS. 9 and 10, this one-way clutch includes a cover 1, a casing 2 incorporated inside the cover 1, a cap 3 of the cover 1, and a rotating shaft 4. The cover 1 is
It comprises a cylindrical portion 5 and a closing portion 6 for closing one end of the cylindrical portion 5. A plurality of convex portions 7 are formed inside the cylindrical portion 5, and a bearing hole 8 for supporting the rotating shaft 4 is provided in the closing portion 6.

The casing 2 has a plurality of recesses 9 formed on the outer periphery thereof so as to mesh with the projections 7 of the cover 1. Therefore, if the convex portion 7 and the concave portion 9 are engaged with each other, the casing 2 can be incorporated inside the cover 1. The casing 2 has a shaft hole 10 into which the rotary shaft 4 is inserted, and a plurality of needle holes 12 around which the needle 11 is inserted.

Further, a plurality of spring holes 14 into which the spring members 13 are inserted are formed in the casing 2. The spring member 13 applies a spring force to the needle 11. The spring member 13 has a spring hole 14
And a plurality of spring portions 1 inserted into the
5 are connected to each other. The needle hole 12 and the spring hole 14 are connected while sharing a part thereof. The needle hole 12 has an outer surface 12a,
It comprises a spring hole 14 and an end surface 12b on the opposite side.

The outer surface 12a is inclined from the spring hole 14 toward the end surface 12b. That is, the distance from the side surface of the rotary shaft 4 to the spring hole 14 side of the outer surface 12a is longer than the diameter of the needle 11, and the distance from the side surface of the rotary shaft to the end surface 12b is the diameter of the needle 11 Shorter than that. That is,
The outer surface 12a and the outer periphery of the rotating shaft 4 form a wedge-shaped holding portion. In the needle hole 12 having the outer surface 12a as described above, the spring force of the spring member 13 is:
Acts to bring the needle 11 into contact with the rotating shaft 14.

[0006] The needle 11 and the spring member 13,
The needle hole 12 and the spring hole 14 into which this is inserted are combined to form a clutch mechanism c. The cap 3 closes the other end of the cylindrical portion 5 of the cover 1 and forms a bearing hole 17 for supporting the rotating shaft 4. In the above-described configuration, the casing 2 is incorporated into the cover 1, and further, the needle 1 is attached to the casing 2.
1 and the spring member 13 are assembled. When the cap 3 is placed on the cover 1 and the casing 2, the rotary shaft 4 is inserted so as to pass through the bearing hole 8 of the cover 1, the shaft hole 10 of the casing 2, and the bearing hole 17 of the cap 3.

FIG. 10 shows a cross section of a one-way clutch. In the above configuration, FIG.
Using 0, the operation will be described. In FIG.
The rotation shaft 4 is rotated in the arrow X direction. When the rotating shaft 4 rotates in the direction of the arrow X in this way, with this rotation,
The needle 11 is strongly pushed in the direction of the end face 12 b of the needle hole 12 by the rotational force and the spring force of the spring member 13. When the needle 11 is strongly pushed toward the end face 12b in this manner, the needle 11 is completely clamped by a wedge-shaped clamping portion formed by the outer surface 12a and the outer periphery of the rotating shaft 4.

[0008] When the needle 11 is held between the holding portions, the pressing force of the needle 11 against the rotating shaft 4 increases, and the needle 11 locks the rotation of the rotating shaft 4. When the rotating shaft 4 is locked, the rotating shaft 4 cannot rotate relative to the casing 2.
In this state, the rotation shaft 4 is locked and cannot rotate relative to the casing 2.
Is rotated in the direction of the arrow X, the casing 2 rotates in the direction of the arrow X with this rotation.

On the other hand, when the rotating shaft 4 is rotated in the direction of the arrow Y in FIG. 10, the needle 11 is pressed in the direction of the arrow Y with this rotation. Needle 1
When the needle 1 is pressed in the arrow Y direction, the needle 11 bends the spring portion 15 and
Move to 4 side. The size of the needle hole 12 on the spring hole 14 side is larger than the diameter of the needle 11, so that the needle 11 comes off the holding portion. That is, the needle 11 is not pressed in the direction of the rotating shaft 4 and the relative rotation between the rotating shaft 4 and the casing 2 is not locked. That is, the rotation of the rotating shaft 4 is kept free.

Therefore, when the rotating shaft 4 is rotated in the direction of arrow Y, the rotating shaft 4 rotates relative to the casing 2. In other words, even if the rotating shaft is rotated in the direction of the arrow Y, the casing 2 does not rotate with this rotation. As described above, the one-way clutch transmits the rotational force to the casing 2 when the rotating shaft 4 is rotated in one direction, and does not transmit the rotational force to the casing 2 when the rotating shaft 4 is rotated in the other direction.

In the conventional one-way clutch as described above, a high precision is particularly required for the needle hole 12 and the spring hole 14 which are the clutch mechanism c. Because, for example, if the holding portion of the needle hole 12 becomes larger than the set value, when the needle 11 moves in the arrow X direction,
The time until the rotation shaft 4 is locked becomes long.
In other words, the time from rotating the rotating shaft 4 until the rotating shaft 4 is locked and the rotation is transmitted to the casing 2 becomes longer, and the responsiveness of the clutch function is deteriorated.

As described above, a simple method for maintaining the accuracy of the needle hole 12 and the spring hole 14 is as follows.
It is conceivable that the casing 2 in which the spring holes 2 and the spring holes 14 are formed is made of plastic. Plastics can be molded and obtained with high precision.

[0013]

However, since the plastic is susceptible to heat, if the casing 2 is made of plastic as described above, there is a problem that the one-way clutch cannot be used in high temperatures. So this method is rarely used. Therefore, the casing 2 is made of a sintered metal. This is because the sintered metal is resistant to heat and can form the spring hole 14 and the needle hole 12 with high accuracy. However, in the case of this sintered metal, if the shape is complicated, the molding process becomes complicated, and a high technology is required, so that the molding cost increases. Therefore, there is a problem that the entire one-way clutch becomes expensive.

Further, in the case of this sintered metal, there is a problem that its strength is weak. That is, as described above, when the rotating shaft 4 is rotated in the arrow X direction, the needle 1
1 is pressed against the outer side surface 12a with a strong force. Moreover,
When the relative rotation between the rotating shaft 4 and the casing 2 is locked and this locked state is maintained, especially when the needle 11 is extremely strong, the outer surface 1 of the needle hole 12 is
2a. In order to resist this pressing force, the casing 2 needs to have strong strength.

Therefore, the following method has been considered as a method for forming the needle hole 12 and the spring hole 14 with high precision using metal. This is a method in which the needle hole 12 and the spring hole 14 are formed in a metal plate member by press working, and a plurality of the plate members are stacked. Furthermore, the plate members were stacked, and press-fitting of the plate members was considered in order to maintain the stack.

As a method of laminating the pressed metal plate members by press fitting, for example, a method shown in FIG. 11 is known. FIG. 11 shows a plate member 18 used for a motor core. The plate member 18 has a ring-shaped member 19 and a branch portion 20 around which a conductive wire is wound. Further, a press-fit portion 21 in a dot shape is formed in the branch portion 20. Since the press-fit portion 21 is formed by embossing, a concave portion is formed on one surface of the plate member 18 and a convex portion is formed on the other surface.

The plate members 18 as described above are stacked, and the convex portion of the press-fit portion 21 of the upper plate member 18 is pressed into the concave portion of the press-fit portion 21 of the lower plate member 18. I try not to peel off. When the plurality of plate members 18 are stacked in this manner, a conductive wire is wound around the stacked branch portions 20. The laminated structure formed by such a method,
This is effective in a case where a particularly strong force does not act on the laminated end face, such as a motor core. Further, in the case of the motor, as described above, since the conductor is wound around the branch upper portion 20, the connection between the respective plate members 18 can be reinforced.

However, if the method used for the core of the motor shown in FIG. 11 is applied to a one-way clutch as it is, there are the following problems. That is, a one-way clutch having the same shape as the cross section of the casing 2 shown in FIG. 10 is punched out from a plate member by press working, and a dot-shaped press-fit portion 21 is formed at any of a plurality of positions on the plate member. Then, the press-fitting portions are press-fitted with each other, and a plurality of plate members are stacked. The laminated product is used as the casing 2.

In the casing thus laminated,
When the clutch function is generated, the needle presses the support portion of the needle hole with a large force, particularly when locking the rotating shaft. Thus, when the needle presses the needle hole with a large force, between the laminated plate member and the plate member,
A force acts in a direction in which this peels off. In particular, when the needle is slightly inclined, a pressing force acts on the plate member in a direction deviated. When the pressing force acts in such a deviated direction, the laminated plate members are easily peeled off from each other.

Since the area of the dot-shaped press-fitted portion formed on the plate member is smaller than the area of the entire casing, the force for holding the press-fitted plate-shaped member was not sufficient. If the holding force is not sufficient as described above, when a force is applied in a direction in which the plate members are separated from each other, the press-fitted portion of one plate member and the press-fitted portion of the other plate member are separated from each other. There is.

In addition, if a large number of dot-shaped press-fitting portions are formed on the plate member in order to sufficiently secure the holding force of the press-fitting portions, there is a problem that the entire one-way clutch becomes large. . Because another press-fit portion is press-fitted into the press-fit portion, the press-fit portion cannot be press-fitted unless the press-fit portion itself has a certain strength. In order to maintain the strength of the press-fitted portion, a flat portion that has not been deformed was required in a wide range around the press-fitted portion.

Therefore, when a press-fit portion capable of maintaining a certain strength is to be formed in the plate member, the press-fit portion is made to have a certain size or more, and the periphery of the press-fit portion is formed by a flat plate. It must be covered over a wide area with components. Therefore, in order to form a large number of press-fit portions, the plate member itself needs a large area, and there is also a disadvantage that the entire one-way clutch becomes large.
An object of the present invention is to provide a small one-way clutch which has high strength and is easy to manufacture.

[0023]

According to a first aspect of the present invention, there is provided a rotating shaft, a casing for supporting the rotating shaft, and a clutch mechanism provided in the casing, wherein the clutch mechanism rotates when the shaft rotates to one side. In a one-way clutch in which the shaft slides in the casing and rotates in the other direction, the sliding is locked. In the one-way clutch, the casing is formed by stacking a plurality of plate members. The press-fit projection formed on the other surface and corresponding to the press-fit recess is press-fitted into the formed press-fit recess.

According to a second aspect of the present invention, the plate member is die-cut by press working, and a press-fitting concave portion and a press-fitting convex portion are formed by this press working. A third invention is characterized in that the press-fitting concave portion and the press-fitting convex portion are formed along the outer periphery of the plate member.

A fourth invention is characterized in that the plate member comprises a bottom plate member forming a bottom plate of the casing, a middle plate member forming a clutch mechanism, and a lid plate member forming a lid of the casing. . The fifth invention is characterized in that the lid plate member is provided with a bearing hole for supporting the rotating shaft.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 5 show a first embodiment of the present invention. In the present invention, a metal plate member is stamped out by press working, and the stamped plate members are laminated to form a casing 22 of a one-way clutch.
The greatest feature is that a press-fit portion is formed over the entire circumference of the casing 22. The configuration other than this feature is the same as that of the conventional example, and a detailed description thereof will be omitted.

FIG. 1 shows an overall view of the casing 22 of the first embodiment, and FIG.
Is mounted on the cover K, and the rotating shaft 2
FIG. 4 is a sectional view when 4 is inserted. The cover K shown in FIG. 2 is designed as a gear component, but this cover K is designed and used as a pulley component and other components in addition to the gear component. Figure 1 above
As shown in FIG. 2, the casing 22 is constituted by a plurality of plate members. This plate member includes a bottom plate member 23a of the lowermost layer, a lid plate member 23c of the uppermost layer, and a middle plate member 23b laminated therebetween. Further, the cover K includes a cylindrical portion Ka and a closing portion Kb for closing one end of the cylindrical portion Ka. A plurality of convex portions (not shown) are formed inside the cylindrical portion Ka, and a bearing portion Kc for supporting the rotating shaft 24 is provided in the closing portion Kb. The cover K is made of resin and has the cylindrical portion Ka,
The closing portion Kb, the convex portion, and the bearing portion Kc are integrally formed.

FIG. 3 is an enlarged view of the intermediate plate member 23b. The intermediate plate member 23b has a shaft hole 25a into which the rotary shaft 24 is inserted, and a plurality of needle holes 27a into which the needle 26 is inserted around the shaft hole 25a. Further, around the shaft hole 25a,
A plurality of spring holes 29a are formed in the needle holes 27a and into which spring members 28 for applying a spring force to the needles 26 are inserted. The casing 22 has a plurality of recessed portions 30a formed on the outer periphery thereof.

Further, a press-fit portion is formed on the outer peripheral side of the needle hole 27a and the spring hole 29a of the middle plate member 23b. This press-fit portion will be described with reference to a cross-sectional view of the middle plate member 23b shown in FIG. That is, the press-fit recess 31 formed over the entire circumference of one surface A is formed in the middle plate member 23b, and the press-fit protrusion 32 corresponding to the press-fit recess 31 is formed on the other surface B. . The press-fit recess 31 and the press-fit protrusion 32 are formed in a circular shape along the outer periphery of the casing 22. The press-fit concave portion 31 and the press-fit convex portion 32 are formed by stamping the middle plate member 23b by press working.

In the bottom plate member 23a, similarly to the middle plate member 23b, a press-fit recess 31 is formed on one surface A.
A press-fit projection 32 is formed on the other surface B. The lid plate member 23c has a press-fit projection 32 similar to that formed on the middle plate member 23b and a press-fit recess 35 having a shape different from that of the middle plate member 23b. A ring-shaped driving member D is press-fitted into the press-fitting recess 35. However, the needle hole 27a and the spring hole 29a are not formed in the bottom plate member 23a and the lid plate member 23c. That is, only the shaft hole 25a is formed in the bottom plate member 23a and the lid plate member 23c.
Note that the bottom plate member 23a does not need to be formed with a press-fit projection having the same shape as the middle plate member 23b. However, if the press-fitting protrusion having the same shape as the press-fitting protrusion 31 of the middle plate member 23b is also formed on the bottom plate member 23a as in the first embodiment, the bottom plate member 23a and the middle plate member 23b are connected. It can be formed in the same mold.

The casing 22 is formed by laminating a plurality of intermediate plate members 23b having the press-fit recesses 31 and the press-fit protrusions 32 formed as described above, a bottom plate member 23a, and a bottom plate member 23c. That is, as shown in FIG. 1, the first middle plate member 23b is laminated on the bottom plate member 23a. And
The press-fit projection 32 of the middle plate member 23b is pressed into the press-fit recess 32 of the bottom plate member 23a. When the first middle plate member 23b is pressed into the bottom plate member 23a, the first middle plate member 23
The second intermediate plate member 23b is laminated on the second intermediate plate member 23b, and the second intermediate plate member 23b is similarly pressed into the first intermediate plate member 23b. In this way, in this embodiment, eight middle plate members 23b are stacked and press-fitted.
Further, when the intermediate plate member 23b is laminated, the needle hole portion 27a and the spring hole portion 29a formed in the intermediate plate member 23b are made to exactly match.

As described above, when the casing 22 is formed by press-fitting the plurality of middle plate members 23b into the bottom plate member 23a so that the needle hole portions 27a and the like are exactly aligned, the inside of the casing 22 is A plurality of needle holes 27a of the plate member 23b are connected to form needle holes 27 each holding one needle 26. Also,
Similarly, the plurality of spring holes 29a are connected to form the spring member 2.
8, a plurality of spring holes 29 are formed.

Each of the plurality of needle holes 27 has an outer surface 33 and an end surface 34. The outer surface 33 is inclined from the spring hole 29 side toward the end surface 34 side. That is, the distance from the spring hole 29 to the outer peripheral surface of the rotary shaft 24 is increased, and the distance from the end surface 34 to the side surface of the rotary shaft 24 is reduced. A holding portion is formed at a portion where the distance between the outer surface 33 and the outer periphery of the rotating shaft 24 is reduced. The holding portion is a position where the rotating shaft 24 is locked by the needle 26 pushed into the holding portion, as in the conventional example. Further, when the needle 26 is on the spring hole 29 side,
The needle hole 27 has such a size that the needle 26 can easily rotate.

By stacking the above plate members, the needle holes 27,
After the spring hole 29 is formed, the needle 26 is inserted into the needle hole 27, and the spring member 28 is inserted into the spring hole 29. When the needle 26 and the spring member 28 are inserted in this manner, the bottom plate 23a is located on the bottom side of the casing 22, so that the needle 26 and the spring member 28 are supported by the bottom plate 23a. Therefore, the needle hole 27
The needle 26 inserted into the spring hole 28 and the spring member 28 inserted into the spring hole 29 do not fall down.

As described above, the needle 2 is
After the 6 and the spring member 28 are inserted, the lid plate member 23c is press-fitted into the uppermost middle plate member 23b. That is, the press-fit projection 32 of the lid plate member 23c is
Press-fit into the press-fit recess 31 of b. Thus, the middle plate member 23
By pressing the lid plate member 23c into b, the lid can be formed on the casing 22. When the lid plate member 23c is press-fitted in this manner, the concave portion forming portion 30a formed on the outer periphery of the intermediate plate member 23b and the concave portion forming portion 30a formed on the lid plate member 23c exactly match.

By closing the lid in this manner, the needle 26 and the spring member 28 once inserted will not fall even if the one-way clutch is inverted.
Further, as described above, the plurality of middle plate members 23b are press-fitted into the bottom plate member 23a, and the lid plate member 23c is press-fitted into the middle plate member 23b, so that the shaft hole portions 25a formed in the respective plate members are connected to each other, A hole 25 is formed. The rotating shaft 24 is inserted into the formed shaft hole 25. A bearing member 49 is press-fitted into the inner diameter portion of the lid plate member 23c. The bearing hole 49 of the bearing member 49 and the cover K
The rotation shaft 24 supports the rotation shaft 24 by bearings c. This bearing member 49 is desirably formed using a material suitable for a bearing function such as copper. However, it is also possible to directly support the rotating shaft 24 at the inner diameter of the lid plate member 23c without separately providing the bearing member 49. In this case, the material of the lid plate member 23c needs to be a material suitable for the bearing function, and a bearing hole needs to be formed in the center.

Further, as described above, each of the plate members 23
By press-fitting a, 23b, and 23c, the concave portion forming portion 30a is connected to form the concave portion 30 on the outer periphery of the casing 22. The concave portion 30 is designed to mesh with a convex portion formed on the inner periphery of the cover K (not shown). Therefore,
The casing 22 can be incorporated into the cover by engaging the convex portion of the cover with the concave portion 30. In addition, the engagement of the convex portion and the concave portion 30 in this way prevents the casing 22 from sliding on the inner periphery of the cover K.

In the above-described one-way clutch, the casing 22 is formed by stacking the bottom plate member 23a and a plurality of middle plate members 23b. As a method of laminating the bottom plate member 23a and the plurality of middle plate members 23b, a lamination press method can be used. The laminating press method is a processing method of punching a plate material, stacking a plurality of the punched plate materials, and press-fitting the punched plate material to form a laminated pressed product.

In the first embodiment, the inner diameters of the bottom plate member 23a and the middle plate member 23b are different. That is, only the shaft hole 25a is formed in the bottom plate member 23a, but the middle plate portion 23b forms the shaft hole 25a and also forms a needle hole in the shaft hole 25a. Since the inner diameters of the bottom plate member 23a and the middle plate member 23b are different from each other, the casing 22 is formed by the following method. That is, in the case of the bottom plate member 23a, the shaft hole 2
The plate material is punched out by an inner diameter punch for forming only the portion 5a. Next, the inside diameter of the middle plate member 23b to be laminated on the bottom plate member 23a is punched. At this time, the bottom plate member 2
A punch for forming the inner diameter of the bottom plate member 23a;
The punch for punching the inside diameter of the hole is changed instantaneously. That is, the punch for the bottom plate member 23a is retracted, and the punch for the middle plate member 23b comes out.

After the punching of the inner diameter shape, the press-fitting concave portion 31 and the press-fitting convex portion 32 are formed in the bottom plate member 23a and the middle plate member 23b by half punching. Further, the outer diameters of the bottom plate member 23a and the middle plate member 23b are punched. Then, a plurality of middle plate members 23b are overlapped on the bottom plate member 23a, and when the required number of sheets overlaps, these are press-fitted. By press-fitting in this way, the laminated bottom plate member 23a and the plurality of middle plate members 23b are integrated,
The casing 22 is completed.

The needle 26 and the spring member 28 are inserted into the casing 22 formed as described above, and the lid plate member 23c is pressed into the casing 22 into which the needle 26 and the spring member 28 are inserted.
In the first embodiment, after the lid member 23c is press-fitted, the driving member D is press-fitted into the press-fit recess 35 of the lid member 23c.

The operation of the one-way clutch constructed as described above will be described with reference to FIG. FIG. 5 is a diagram when the lid plate member 23c of the one-way clutch is removed and viewed from above. In FIG. 5, the rotating shaft 2
When the rotating member 4 is rotated in the direction of the arrow X, the rotating shaft 24 is locked so as not to move relative to the casing 22. Further, when the rotating shaft 24 is rotated in the direction of arrow Y, the rotating shaft 24 is free, and the rotating shaft 24 moves relatively to the casing 22.

That is, when the rotating shaft 24 is rotated in the direction of the arrow X, the needle 26 is pushed into the holding portion with this rotation, that is, the pressing force of the needle 26 against the rotating shaft 24 increases. Due to this pressing force, the needle 26 locks the rotation of the rotating shaft 24. When the rotation shaft 24 is locked, the rotation shaft 24 cannot rotate relative to the casing 22. Thus, the entire casing 22 is
Rotates in the direction of arrow X with the rotation of.

On the other hand, when the rotating shaft 24 is rotated in the direction indicated by the arrow Y in FIG. 5, the needle 26 is bent along the outer portion 24 a with this rotation. It moves in the direction of the spring hole 29. When the needle 26 moves toward the spring hole 29 in this manner, the needle 26 rotates with the rotation of the rotating shaft 24. That is, since the needle 26 is not strongly pressed against the rotating shaft 24, the needle 26 does not lock the relative rotation between the rotating shaft 24 and the casing 22. That is, the rotation of the rotating shaft 24 is kept free. Therefore, even if the rotation shaft is rotated in the arrow Y direction, the casing 2
2 does not rotate with this rotation.

According to the first embodiment as described above, the press-fitting concave portions 31 and the press-fitting convex portions 32 are formed in a plurality of plate members constituting the casing 22 in a circular shape along the outer periphery of the casing 22. The press-fit projections of the other plate member are press-fitted into the press-fit recesses 31 of one plate member, and these are laminated. Therefore, the holding force between the plate members due to the press-fitting is maintained uniformly over the entire circumference. Moreover, since the press-fit area can be made wider than the conventional press-fitting method,
Its holding power becomes strong. As described above, since the holding force between the plate members by the press-fitting concave portions 31 and the press-fitting convex portions 32 becomes strong, even if a large pressing force by the needle 26 is applied to the plate members, the press-fitting concave portions 31
Will not come off.

Further, the press-fitting concave portion 31 and the press-fitting convex portion 32
Is formed along the outer periphery of the casing 22,
No special space is required for forming the press-fit concave portion 31 and the press-fit convex portion 32. Therefore, the size of the casing 22 can be reduced. Further, in the case where the press-fit portion is formed by dots as in the related art, a sufficient space is required around each of the plurality of dots in order to maintain the strength of the press-fit portion. However, in the first embodiment, since there is only one large annular press-fit portion, a space for maintaining the strength of the press-fit portion may be provided only around this annular portion. This space is smaller in the whole casing than in the related art. Therefore, the casing 22 of the first embodiment can be further downsized.

Further, according to the first embodiment, since a large space for each dot of the press-fitting portion is not required as in the above-described conventional case, the spring hole can be enlarged accordingly. By increasing the size of the spring hole in this way, various springs can be used, and a structure in which the needle 26 is pressed with a wide flat surface of the spring can be easily obtained. When the needle 26 can be pushed with a wide plane of the spring, the needle 2
6 can be stably supported, and the needle 26 does not become oblique. Since the needles 26 do not become slanted, they are stacked by the needles 26.
The force for peeling the plate member is also reduced.

Further, in the first embodiment, the bottom plate 23
a, and a plurality of middle plate portions 23b are cut out,
The press-fitting operation can be performed in a series of flow operations. Therefore, manufacturing is easy and work efficiency is improved. Since the work is easy and the efficiency is good, the cost of the whole one-way clutch can be reduced. A middle plate member 23c in which the lid plate members 23c are laminated.
And the bearing member 49 is press-fitted into the lid plate member 23c to support the rotating shaft 24 as a bearing. Therefore, the bearing can be reliably formed, and the dimensional accuracy of the shaft hole 25a of the bottom plate member 23a and the middle plate member 23b does not have to be as accurate as the bearing.

Further, according to the one-way clutch of the first embodiment, the thickness of the whole one-way clutch can be freely changed only by changing the number of the stacked middle plate members 23b. In addition, since no special device is required to change the number of layers, this design change is easy, and
It can be performed at low cost. Further, since the middle plate member 23b can be formed by press working, the middle plate member 23b is maintained with high accuracy. Since the casing 22 is formed by stacking the high-precision middle plate members 23b, the entire casing 22 can be maintained with high precision. In particular, the pressing process allows the needle hole 27
It is possible to maintain the accuracy of fine processing portions such as the spring holes 29 and the like.

In the first embodiment, after the cover plate member 23c is press-fitted into the casing 22, the driving member D is further press-fitted into the press-fitting recess 31 of the lid plate member 23c. D does not have to be press-fitted. Then, when the driving member D is not press-fitted, it is not necessary to form the press-fitting concave portion 35 in the lid member 23c. However, by press-fitting the driving member D into the press-fitting concave portion 31 of the lid plate member 23c, the lid plate member 23c and the middle plate member 23b are pressed, the middle plate members 23b are press-fitted, and the middle plate member 23b and the bottom plate member 23a. Can be strengthened respectively.

In the first embodiment, the press-fit recess 31 is used.
And only one press-fit projection 32 is formed, but this is not limited to a pair. That is, as shown in FIG. 6, the press-fit recess 3 is inserted into one middle plate member 23b.
One and a plurality of press fitting projections 32 may be formed. As described above, the plurality of press-fit concave portions 31 and the press-fit convex portions 3
By press-fitting, the intermediate plate members 23b are more firmly held.

FIG. 7 shows a second embodiment of the present invention. The second embodiment is characterized in that the press-fit portion of the middle plate member 36b is formed on the needle hole 37a and the spring hole 38a. The configuration other than this feature is the same as in the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted.

As shown in FIG. 7, in the second embodiment, the press-fit concave portions 39 and the press-fit convex portions 40 are connected to the middle plate member 36.
The b is formed in the portion where the needle hole 37a and the spring hole 38a are formed. That is, a shaft hole 41a is formed in the intermediate plate member 26b, and a plurality of needle holes 37a and spring holes 38a are formed around the shaft hole 41a.

By forming the needle hole 37a and the spring hole 38a around the shaft hole 41a in this manner, one needle hole 37a and the spring hole 38a are formed.
A plurality of protrusions 42 are formed between the needle hole 37a and the spring hole 38a adjacent thereto. In the second embodiment, the press-fit recess 39 and the press-fit protrusion 40 are formed on the protrusion 42.

The press-fit recess 39 and the press-fit protrusion 40 are
Although cut by the needle hole 37a and the spring hole 38a, it is formed on a concentric circle on the outer periphery of the intermediate plate member 36b. That is, by forming the press-fitting concave portions 39 and the press-fitting convex portions 40 on the plurality of protrusions 42 as described above, the press-fitting concave portions 39 and the press-fitting convex portions 40 are formed over the outer periphery of the intermediate plate member 36b. I am trying to be. Also, a press-fit portion is formed on the bottom plate member 36a and the lid plate member 36c (not shown) at positions corresponding to the press-fit concave portions 39 and the press-fit convex portions 40 formed on the middle plate member 36b.

As described above, the bottom plate member 36a and the middle plate member 3
6b, when the press-fitting concave portion 39 and the press-fitting convex portion 40 are formed in the lid plate member 36c, the bottom plate member 36a and the middle plate member 36b are press-fitted by press working as in the first embodiment to form a casing. Then, a needle and a spring member are inserted into this casing, and the lid plate member 36c is inserted.
Close the lid. This lid plate member 36c is also press-fitted by press working.

In the one-way clutch of the second embodiment formed as described above, the operation of locking or freeing the rotating shaft is the same as in the first embodiment. Here, the detailed description is omitted.

In the one-way clutch according to the second embodiment, the press-fit recess 39 and the press-fit protrusion 40 are connected to the needle hole 3.
7a and the protrusion 42 forming a part of the spring hole 38a
As a result, the press-fit recesses 40 were harder to come off from the press-fit recesses 39. Because, in this one-way clutch, the strongest disengagement force acts on the press-fit portion when the rotating shaft is locked, and the needle hole portion 37a against which the needle is strongly pressed is applied. However, in the second embodiment, the press-fitting recess 39 and the press-fitting protrusion 40 are formed on the protrusion 42 forming the needle hole 37a on which the strong force acts, so that the middle plate member is more effectively formed. The holding force between 36b can be maintained.

FIG. 8 shows a third embodiment of the present invention. The third embodiment is most characterized in that the press-fit portion of the middle plate member 43b is formed along the outer circumference of the needle hole 44a and the spring hole 45a. The components using the same reference numerals as those in the first and second embodiments indicate the same components as those in the first and second embodiments. The detailed description of the same components as those in the first and second embodiments will be omitted.

As shown in FIG. 8, in the third embodiment, the press-fit concave portions 46 and the press-fit convex portions 47 are
B is formed along the outer circumference of the needle hole 44a and the spring hole 45a. Thus, the needle hole 44a
By forming the press-fitting concave portion 46 and the press-fitting convex portion 47 along the outer periphery of the spring hole portion 45a, the press-fitting concave portion 46 and the press-fitting convex portion 47 are formed over the outer periphery of the middle plate member 36b. I have. Further, the bottom plate member and the lid plate member (not shown) also have press-fit portions formed at positions corresponding to the press-fit concave portions 46 and the press-fit convex portions 47 formed on the middle plate member 43b.

As described above, the bottom plate member, the middle plate member 43b,
After the press-fit recess 46 and the press-fit recess 47 are formed in the lid plate member, the bottom plate member and the middle plate member 43b are press-fitted by press working in the same manner as in the second embodiment to form a casing. Then, a needle and a spring member are inserted into the casing, and a lid is closed with a lid plate member. This lid plate member is also press-fitted by press working.

In the one-way clutch of the third embodiment formed as described above, the operation of locking or freeing the rotating shaft is the same as in the second embodiment. Here, the detailed description is omitted.

In the one-way clutch according to the third embodiment, the press-fitting concave portion 46 and the press-fitting convex portion 47 are connected to the needle hole 4.
Since it was formed along the outer periphery of 4a and the spring hole 45a, the press-fitting recess 46 and the press-fitting recess 47 were more difficult to come off. This is because, in this one-way clutch, the force that most tends to remove the press-fit portion from the casing acts on the needle hole portion 44a where the needle is strongly pressed when the rotating shaft is locked. Therefore, the press-fit concave portion 46 and the press-fit convex portion 47 are formed along the needle hole portion 44a on which the strong force acts, and these are press-fitted, so that the holding force between the intermediate plate members 43b is more effectively reduced. Can be maintained.

Further, according to the third embodiment, since the press-fit concave portion 46 and the press-fit convex portion 47 can be formed over a wider range, the holding force between the intermediate plate members 43b can be further strengthened. And these are inserted into the press-fit recesses 46.
And the press-fit projection 47 can be prevented from coming off.

[0065]

According to the first invention, the casing is formed by laminating a plurality of plate members, and is formed on the press-fitting recess formed over the entire circumference of one surface, and on the other surface, and Since the press-fit projections corresponding to the press-fit recesses are press-fitted, the press-fit area of the plate member can be increased, and the press-fit is firmly maintained. Therefore, even if a strong external force acts on the press-fitted portion, there is an effect that the press-fitted convex portion does not come off from the press-fitted press-fitted concave portion.

According to the second aspect of the present invention, the plate member is stamped out by press working, and the press-fitting concave portion and the press-fitting convex portion are formed by this press working, so that the plate member can be obtained with high precision. This has the effect that the casing can be easily formed.

Further, according to the third aspect, the press-fitting concave portion and the press-fitting convex portion are formed along the outer periphery of the plate member, so that the plate member has a holding force for holding the plate members evenly. Works. Further, since no special space is required for forming the press-fitting concave portion and the press-fitting convex portion, there is an effect that the entire one-way clutch can be reduced in size.

According to the fourth aspect of the present invention, the plate member includes the bottom plate member forming the bottom plate of the casing, the middle plate member forming the clutch mechanism, and the lid plate member forming the lid of the casing. The mechanism member of the clutch mechanism can be assembled while being supported by the bottom plate member of the casing, and after being assembled, can be supported by the lid member so as not to fall. Therefore, there is an effect that the mechanism members of the clutch mechanism do not fall from above and below.

According to the fifth aspect of the present invention, since the bearing hole for supporting the rotary shaft is provided in the lid plate member, there is an effect that the bearing effect can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a first embodiment.

FIG. 2 is a sectional view when the one-way clutch of FIG. 1 is assembled.

FIG. 3 shows a middle plate member 23b of the first embodiment.

FIG. 4 is a cross-sectional view of the middle plate member 23b of FIG.

FIG. 5 is a view of the lid plate member 23c shown in FIG.

FIG. 6 is a sectional view showing another embodiment of the first embodiment.

FIG. 7 is a view showing a middle plate member 36b of a second embodiment.

FIG. 8 is a view showing a middle plate member 43b of a third embodiment.

FIG. 9 is a diagram showing an entire configuration of a conventional example.

FIG. 10 is a view showing a cross section when FIG. 9 is assembled.

FIG. 11 is a diagram showing a motor core.

[Explanation of symbols]

 Reference Signs List 22 Casing 23a Bottom plate member 23b Middle plate member 23c Lid plate member 24 Rotating shaft 25 Axis hole 25a Axis hole 31 Press-fit recess 32 Press-fit protrusion 36a Middle plate member 39 Press-fit recess 40 Press-fit protrusion 41a Shaft hole 43b Middle plate member 46 Press-fit recess 47 Press-fit protrusion 48a Shaft hole c Clutch mechanism

[Procedure amendment]

[Submission date] December 27, 2001 (2001.12.
27)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

On the other hand, when the rotating shaft 4 is rotated in the direction of the arrow Y in FIG. 10, the needle 11 is pressed in the direction of the arrow Y with this rotation. Needle 1
When the needle 1 is pressed in the arrow Y direction, the needle 11 bends the spring portion 15 and
4 to move to the side. Since the size of the needle hole 12 is larger than the diameter of the needle 11 on the spring hole 14 side, the needle 11 comes off the holding portion. That is, the needle 11 is not pressed in the direction of the rotating shaft 4 and the relative rotation between the rotating shaft 4 and the casing 2 is not locked. That is, the rotation of the rotating shaft 4 is kept free.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

[0023]

According to a first aspect of the present invention , there is provided a casing for supporting a rotating shaft, and a clutch mechanism provided in the casing, wherein the clutch mechanism is inserted into the casing.
When input is a shaft is rotated in one direction, the shaft slides in the casing, when rotated in the other, the one-way clutch whose sliding is locked, the casing is formed by laminating a plurality of plate members A press-fit recess formed over the entire circumference of one surface, formed on the other surface, and
A press-fit projection corresponding to the press-fit recess is press-fitted.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

FIG. 1 shows an overall view of the casing 22 of the first embodiment, and FIG.
Is mounted on the cover K, and the rotating shaft 2
FIG. 4 is a sectional view when 4 is inserted. The cover K shown in FIG. 2 is designed as a gear component, but the cover K is designed and used as a pulley component and other components in addition to the gear component. Figure 1 above
As shown in FIG. 2, the casing 22 is constituted by a plurality of plate members. This plate member includes a bottom plate member 23a of the lowermost layer, a lid plate member 23c of the uppermost layer, and a middle plate member 23b laminated therebetween. Further, the cover K includes a cylindrical portion Ka and a closing portion Kb for closing one end of the cylindrical portion Ka. A plurality of convex portions (not shown) are formed inside the cylindrical portion Ka, and a bearing portion Kc for supporting the rotating shaft 24 is provided in the closing portion Kb. The cover K is made of resin and has the cylindrical portion Ka,
The closing portion Kb, the convex portion, and the bearing portion Kc are integrally formed.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0058

[Correction method] Change

[Correction contents]

In the one-way clutch according to the second embodiment, the press-fit recess 39 and the press-fit protrusion 40 are connected to the needle hole 3.
7a and the protrusion 42 forming a part of the spring hole 38a
Formed from the press-fitting recess 39
The press-fit projections 40 became hard to come off. Because this one
The strongest disengagement force acts on the press-fitting portion in the y-clutch when the rotating shaft is locked, and is in the needle hole 37a where the needle is strongly pressed. However, in the second embodiment, the press-fitting recess 39 and the press-fitting protrusion 40 are formed on the protrusion 42 forming the needle hole 37a on which the strong force acts, so that the middle plate member is more effectively formed. The holding force between 36b can be maintained.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0061

[Correction method] Change

[Correction contents]

As described above, the bottom plate member, the middle plate member 43b,
After the press-fitting concave portion 46 and the press-fitting convex portion 47 are formed in the lid plate member, the bottom plate member and the middle plate member 43b are press-fitted by press working as in the second embodiment to form a casing. Then, a needle and a spring member are inserted into the casing, and a lid is closed with a lid plate member. This lid plate member is also press-fitted by press working.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0063

[Correction method] Change

[Correction contents]

In the one-way clutch according to the third embodiment, the press-fitting concave portion 46 and the press-fitting convex portion 47 are connected to the needle hole 4.
Since it was formed along the outer periphery of 4a and the spring hole 45a, the press-fit concave portion 46 and the press-fit convex portion 47 were more difficult to come off. Because Oite <br/> this one-way clutch, the force to try to remove most press-fit portion in the casing acts is a time of locking of the rotation axis, with the needle hole portion 44a which needle is pressed strongly is there. Therefore, the press-fit concave portion 46 and the press-fit convex portion 47 are formed along the needle hole portion 44a on which the strong force acts, and these are press-fitted, so that the holding force between the intermediate plate members 43b is more effectively reduced. Can be maintained.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0067

[Correction method] Change

[Correction contents]

Further, according to the third aspect, the press-fitting concave portion and the press-fitting convex portion are formed along the outer periphery of the plate member, so that the plate member has a holding force for holding the plate members evenly. Works. Moreover, it does not require a special space for forming the press-fit recess and press-fitting the convex portion, Wa
This has the effect of reducing the size of the entire one- way clutch .

Claims (5)

[Claims] A rotating shaft, a casing supporting the rotating shaft, and a clutch mechanism provided in the casing. The clutch mechanism slides in the casing when the shaft rotates in one direction. And a one-way clutch whose sliding is locked when rotated to the other side, wherein the casing is formed by laminating a plurality of plate members, and is formed over the entire circumference of one surface of the plate members. A one-way clutch formed by press-fitting a press-fit projection formed on the other surface into the press-fit recess and corresponding to the press-fit recess. 2. The one-way clutch according to claim 1, wherein the plate member is die-cut by press working, and a press-fit concave portion and a press-fit convex portion are formed by the press work. 3. The one-way clutch according to claim 1, wherein the press-fitting concave portion and the press-fitting convex portion are formed along an outer periphery of the plate member. 4. The plate member comprises: a bottom plate member forming a bottom plate of a casing; a middle plate member forming a clutch mechanism;
The one-way clutch according to any one of claims 1 to 3, comprising a lid plate member forming a lid of the casing. 5. The cover plate member according to claim 1, further comprising a bearing hole for supporting a rotating shaft.
The described one-way clutch.