JP3054448B2 - Flywheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flywheel used as a rotating member in electrophotography and the like.

[0002]

2. Description of the Related Art Conventionally, as a flywheel used for a rotating member in electrophotography or the like, for example, Japanese Utility Model Application Publication No.
There is one disclosed in 173765. In this case, in a potential photographic photosensitive member in which a flange (hereinafter, referred to as a flywheel) is attached to an end opening of a drum as a cylindrical substrate, a step is formed in an outer peripheral region of the flywheel, and the step is formed. There is one in which the rotation of the drum is prevented from being run by attaching it to the end opening of the drum using an adhesive.

[0003]

In the above-mentioned conventional flywheel, the material is generally made of iron or the like, and the material formed by integrating a plurality of such materials is made of sheet metal. The cost is high and the weight is heavy. Further, when the sheet metals are stacked, a plurality of the sheet metals are fixed using a shaft, so that when the moments of inertia are equal at the time of assembly, there is a problem that the weight becomes heavy. In addition, when the same shape sheet metal is made with the same mold, if the mold is eccentric, there is a problem that the eccentric portions are piled up by the superposition of the sheet metal.

FIGS. 4 to 6 show a conventional example as a specific example. First, as a first conventional example, as shown in FIG. 4, the flywheel 1 has a shape obtained by punching out a region A located at the center of the rotating shaft 2 in order to obtain a large inertia moment with a light weight. I have. However, when this shape is integrated and made using an iron material or the like, the cost is considerably higher than that of sheet metal in the process. Further, as a second conventional example, as shown in FIGS. 5 and 6, there is an example in which three sheet metals 3 are used in a stacked manner, thereby reducing the cost. In this case, a hole 3a is formed at the center of each sheet metal 3 and a screw hole 3b is formed at the periphery thereof.
A plurality of flywheels 1 can be integrally fixed to the fixture 4 by inserting the protrusion 4a serving as the rotation axis of the fixture 4 into the fixture 4 and fixing the flywheel 1 to the fixture 4 through the screw hole 3b. However, in such a configuration, since the projection 4a serving as the rotation axis is used for positioning, the thick part near the rotation axis cannot be removed, and as a result, the weight is heavier than the first conventional example. Tend to be.

[0005]

In the invention of SUMMARY OF THE INVENTION Claim 1, wherein, to have a middle Kokoroana in the center the center point of the central bore
On a plurality of straight lines provided for each predetermined angle θ
A pair of holes at a predetermined radius from the center point of the center hole
And passing through the center point of the center hole
The positions of the holes on a plurality of straight lines provided for each angle θ.
A pair of projections that fits into the hole on the circumference of the same radius as the
And the center point of the center hole of the hole and the projection
For screw penetration at every predetermined angle θ on the circumference with different radius from
A plurality of donut-shaped wheel plates provided with holes are provided, and the radius from the center point of the center hole is the same as the penetration hole.
Multiple screw holes are formed for each predetermined angle θ on the same circumference
The coupling member is provided by superposition is rotated by a constant angle θ where the wheel plate about said center hole one by one
Insert the screw connected to the screw hole into the hole for screw penetration.
The wheel body formed by integrally into communication
Was .

According to the second aspect of the present invention, the first aspect is provided.
In the described invention, the number M of wheel plates is
When the overlapping angle of the plates is θ, m = 360 ° / θ
Set to an integer multiple .

[0007]

[0008]

According to the first aspect of the present invention, since the wheel plates are provided so as to be rotated by a predetermined angle and overlapped with each other, the eccentricity of the wheel plate caused by the eccentricity of the die when forming the wheel plates with the same mold is obtained. As a result, the eccentricity of the flywheel as a whole wheel plate can be reduced.

According to the second aspect of the present invention, since the holes and projections are formed in the peripheral region of each wheel plate, it is possible to reduce the thickness near the rotation axis located at the center of the wheel plate. Thus, the weight of the entire wheel plate can be reduced.

According to the third aspect of the present invention, the eccentricity of the wheel plate due to the eccentricity of the mold is offset, so that the entire flywheel can have a balanced configuration.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The wheel plate 6 is made of a donut-shaped sheet metal, and has a central portion and a peripheral portion formed around the central portion. A center hole 7 is formed in the center. A pair of holes 9 are formed in the peripheral portion on a straight line 8 passing through the center point P of the center hole 7, and the radius from the center point P to the pair of holes 9 is formed around the center point P. R
And a constant angle, that is, the superposition angle θ = 90
A pair of projections 10 that fit into the holes 9 are formed at positions rotated by an angle of °. Therefore, the pair of projections 10 are also located on the same straight line 8 passing through the center point P, and the holes 9 and the projections 10 are alternately formed on the radius R at an angle of θ = 90 °. Will be. Also, a half angle of 90 ° between the hole 9 and the projection 10, that is, 45 °
The hole 1 for screw penetration on the radius r (r <R) located at °
1 is formed. In this case, four holes 11 are provided so as to face each other on a straight line 12 passing through the center point P, and four holes 11 are formed at a constant angle of 90 °.

When the wheel plates 6 configured as described above are overlapped with each other, as shown in FIG.
By rotating the wheel plate 6 located on the right side by θ = 90 ° with respect to the wheel plate 6 on the left side, the hole 9 and the projection 1 are rotated.
0 can be fitted, thereby positioning can be performed. By repeatedly performing such an operation, a plurality of wheel plates 6 can be overlapped as shown in FIG. 2, whereby the wheel body 13 can be formed. Finally, the wheel body 13
A flywheel centered on a rotating shaft 16 as shown in FIG. 3 is formed by fastening a screw (not shown) through a hole 11 of each wheel plate 6 to a screw hole 15 formed in a coupling plate 14 as a coupling member. can do.

In the present embodiment, the number M of the wheel plates 6 is represented by m when the overlapping angle of the wheel plates 6 is θ.
= 360 ° / θ is set to an integral multiple of 360 ° / θ. That is,
Here, since θ = 90 °, m = 4, whereby the number M is an integral multiple of 4, that is, eight wheel plates 6 are superimposed. Generally, when a sheet metal of the same shape is made with the same mold, the sheet metal is similarly eccentric due to the eccentricity of the mold. However, as in this embodiment, the wheel plate 6 is
By rotating each one and fixing and superimposing four,
The eccentricity of the wheel plate 6 due to the eccentricity of the mold can be offset, thereby achieving a balanced configuration. In addition, since the pair of the hole 9 and the projection 10 that are fitted to each other are formed in different shapes, they can be fixed in only one direction when they are rotated and fixed, so that assembly can be performed easily and accurately. it can.

Further, since the holes 9 and the projections 10 are provided on the wheel plate 6 and fixed as described above, the thickness of the center portion near the rotation axis can be removed, thereby making it possible to reduce the thickness. The weight can be further reduced. In addition, since the weight can be reduced in this manner, a number of wheel plates can be mounted in an overlapping manner, and the number of wheel plates can be changed as necessary. Therefore, this allows the use of a large number of sheets when using a model that requires a large value of the inertia moment value, and reduces the number of sheets when using a model that requires a small value of the moment of inertia. It can be changed and its application range can be further expanded.

[0015]

The invention of claim 1, wherein, according to the present invention is to have a middle Kokoroana the heart at every predetermined angle θ passing through the center point of the central bore
On a plurality of straight lines provided and the center point of the center hole
And forming a pair of holes at a predetermined radius from
The multiple holes provided at every predetermined angle θ passing through the center point of the center hole
On a straight line with the same radius as the position of the hole
Forming a pair of projections to be fitted with the holes and
A circumference having a different radius from the center point of the center hole with the projection
The Donna <br/> tool type wheel plate holes for screw through is formed at every predetermined angle θ of the upper is provided a plurality, or the center point of the center hole
Is a predetermined angle θ on the same circumference as the through hole.
Provided a coupling member having a plurality of screw holes formed in each constant angle at the e <br/> Eel plate about said center hole one by one θ
Rotate and superimpose on the screw through hole
Since the formation of the wheel body by integrating by penetrating the screw coupled to the screw holes, to create a wheel plate the same type, to the eccentric wheel plate caused by the eccentricity of that type are dispersed As a result, the eccentricity of the flywheel as a whole wheel plate can be reduced , and the rotation located at the center of the wheel plate can be reduced.
It is possible to reduce the wall thickness near the axis,
A shall be able to further reduce the weight of the entire wheel plate.

[0016]

According to a second aspect of the present invention, the number M of the wheel plates is such that when the overlapping angle of the wheel plates is θ, m = m
Since the angle is set to an integral multiple of 360 ° / θ, the eccentricity of the wheel plate due to the mold eccentricity is canceled out, and the flywheel as a whole can have a balanced configuration.

[Brief description of the drawings]

FIG. 1 is a front view of overlapping wheel plates showing one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a state in which a plurality of wheel plates are overlaid.

FIG. 3 is a side view of the flywheel.

FIGS. 4A and 4B show a first conventional example, in which FIG. 4A is a front view of a flywheel, and FIG. 4B is a side view thereof.

FIGS. 5A and 5B show a second conventional example, in which FIG. 5A is a front view of a flywheel, and FIG. 5B is a side view.

FIG. 6 is an exploded perspective view showing a second conventional example.

[Explanation of symbols]

 Reference Signs List 6 wheel plate 7 center hole 8 straight line 9 hole 10 projection 13 wheel plate 14 connecting member P center point

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-26674 (JP, A) JP-A-57-102744 (JP, U) JP-A-51-67362 (JP, U) 17414 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16F 15/31

Claims (2)

(57) [Claims] We claim: 1. have a middle Kokoroana in the center within the central bore
On a plurality of straight lines provided for each predetermined angle θ passing through the center point
And a pair at a position of a predetermined radius from the center point of the center hole.
Through the center point of the center hole
On a plurality of straight lines provided for each predetermined angle θ
A pair that fits with the hole on the circumference of the same radius as the position of the hole
Forming a projection, and defining the center hole between the hole and the projection.
Screws at predetermined angles θ on a circle with different radii from the center point
A plurality of donut-shaped wheel plates provided with holes for penetration are provided, and the radius from the center point of the center hole is
Multiple screw holes are formed for each predetermined angle θ on the same circumference as the hole
The coupling member is provided, a screw coupled to the screw hole superimposed is rotated by at a constant angle θ of the wheel plate about said center hole one by one in the holes for the screw through
Forming a wheel body by integrating by penetrating the <br/> and flywheel, wherein the kite. 2. The number M of wheel plates is determined by the weight of the wheel plates.
When the joining angle is θ, m is an integral multiple of 360 ° / θ
The flywheel according to claim 1, wherein the flywheel is set to: