JPH084779A - Rotary body fixing tool and its manufacture - Google Patents

Abstract

PURPOSE:To improve transmission torque by manufacturing wedge bodies by cutting or grinding work, forming an inner ring and an outer ring as partially opening annular bodies formed by bending a belt-like material in an annular shape, and forming opposed end parts opposed by sandwiching a slit of these inner ring and outer ring as waveform edge parts of the mutually meshing same shape. CONSTITUTION:Wedge bodies 31 and 32 are manufactured by cutting work, and an inner ring 1 and an outer ring 2 are formed as partially opening annular bodies by bending of a rolling roller. Opposed end parts opposed by sandwiching a slit S of the inner ring 1 and the outer ring 2 are formed as waveform edge parts N and N of the mutually meshing same shape. This rotary fixing tool is inserted between a boss of a rotary body and a shaft, and in a fastened condition, since the waveform edge parts N and N are put in a meshing condition, the mutual opposed end parts are not fastened in a condition of being dislocated in the axial direction. Thereby, since positions of respective parts of the inner ring 1 and the outer ring 2 are accurately opposed to inner and outer peripheral taper surfaces of the wedge bodies 31 and 32, transmission torque can be enlarged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary member fixing method and a manufacturing method thereof, and more particularly to a pair of annular wedge members and an inner ring.
The present invention relates to a rotary body fixing tool of a type in which (1) and an outer ring (2) are fitted to each other and the wedge bodies are fastened to each other in an axial direction, and a manufacturing method thereof.

[0002]

2. Description of the Related Art As a rotating body fixing device, there is a fixing device shown in FIG. 9, which has an inner ring (1) having a trapezoidal cross section convex on the outer peripheral side and an outer periphery thereof. The outer ring (2), which has a trapezoidal cross section that is convex on the inner peripheral side and is spaced from the outer ring (2), and a pair of wedges (31) (32) that are inserted from both ends of these gaps. Composed.

In this conventional type, both sides of the inner ring (1) are tapered surfaces (T) whose diameter gradually increases toward the center of the cross section, and both sides of the other outer ring (2) gradually increase toward the center of the cross section. It is a tapered surface (T) with a small diameter. And
The wedge bodies (31) and (32) are inserted between the tapered surfaces (T) and (T), and the inner peripheral surface of the wedge bodies (31) and (32) is the inner ring surface of the inner ring (1). It becomes a taper surface that matches the taper surface (T),
The other outer peripheral surface is a tapered surface that matches the tapered surface (T) of the outer ring (2). Of these wedges (31) (32), one of the wedges (31) has a plurality of through holes (33) (3
3) is opened, and the other wedge body (32) is similarly provided with screw holes (34) and (34).

In this case, the inner ring (1) is fitted onto the shaft (J) and the outer ring (2) is inserted into the boss (B) of the rotating body (R), and the screw is inserted from the through hole (33). When the tightening bolts (4) and (4) inserted in the holes (34) are tightened, the inner ring (1) shrinks due to the wedge action of the tapered surfaces because each tightening body has a slit (S). The outer ring (2) is pressurized in the opposite direction and is expanded in the opposite direction, so that the shaft (J) and the rotating body (R) are connected in a rotationally transmitted state.

As described above, the rotary member fixing device of the above type is advantageous in that it is not necessary to form a key groove in the shaft (J) and the boss (B). However, conventionally, the inner ring (1) and the outer ring (2) of the above-described type of rotating body fixture are manufactured by cutting similarly to the wedge bodies (31) and (32), and their productivity and performance are There is a problem in terms.

[0006] Therefore, the inner ring (1) and the outer ring (2) are partially opened annular bodies formed by roll-bending a band-shaped body (F) of a constant length having a cross-sectional shape close to the cross-section while slightly rolling. In this one, the tightening body is bent in a slightly rolled state, so that the taper surface (T), etc. The surface is finished to have a smoothness similar to that of the roll surface and has a certain work hardening. Therefore, when tightening in the axial direction in a manner in which the tapered surfaces are in pressure contact with each other, this tightening force is smoothly converted into the radial tightening force between the shaft and the rotating body.

Further, since the inner ring (1) and the outer ring (2) are formed by annularly bending a band-like body (F) which is cut into a predetermined size in advance, a burr or burr is formed at the slit (S). No burr will occur. Further, even if the band-shaped body (F) has extremely small burrs and burrs, these are crushed during roll bending. Therefore, when used as a rotating body fixture,
The tightening force for tightening these in the axial direction is efficiently converted into the shaft tightening force.

However, in the inner ring (1) and the outer ring (2) constructed as described above, both ends of the slit (S), that is, both ends of the strip (F) are hard to bend in an arc shape and are straight lines. It is easy to remain as it is. In this case, the slits are formed in the inner ring (1) and outer ring (2) that are formed in a ring shape.
A certain range of the ends facing each other with (S) sandwiched between the outer peripheral surface of the shaft, the inner peripheral surface of the boss, and the wedge body is insufficient and the transmission torque is insufficient. However, there is a problem in that the contact portion of is easily scratched. In addition, when the linear portion remains, the inner ring (1) and the outer ring (2)
Since the roundness is insufficient, the eccentricity of the rotating body fixing tool in the initial stage of tightening is large, and even if the tightening is completed, this remains unresolved and remains inconvenient.

The present invention has been made in view of the above point, and describes that "a taper surface (T) (T) in which the width of the inner end face in the radial direction is smaller than that of the outer end face and the inner and outer peripheries are substantially symmetrical to each other. ), The pair of endless ring-shaped wedges (31) (32) are arranged opposite to each other, and an axial slit (S) is partially provided in the inner ring.
(1) and the outer ring (2) are individually taper-fitted to the inner and outer peripheral sides of the wedge bodies (31) and (32), respectively, and the wedge body is mutually axially tightened by a plurality of tightening bolts (4) and (4). Tighten in the direction of the inner ring (1)
(J) side, the outer ring (2) is pressed to the boss (B) side, respectively. The problem is to make it difficult to scratch these contact parts in the vicinity of the slit (S) of the outer ring (2). [Invention of Claim 1]

[0010]

[Technical Means] The technical means of the present invention taken to solve the above-mentioned problem is that "the wedge bodies (31) (32) are manufactured by cutting, and the inner ring (1) and the outer ring (2) are , A partially opened annular body formed by bending the rolling rolls, and having substantially the same shape in which the opposite ends facing each other with the slits (S) of the inner ring (1) and the outer ring (2) engaged with each other are formed. The corrugated edge (N) (N) ”is used.

[0011]

[Function] The inner ring (1) and the outer ring (2) are partially open annular bodies bent in an annular shape from the belt-like body (F), and the opposite ends facing each other across the slit (S) are corrugated edges. Since it is the part (N) (N), the bending rigidity of the part of the corrugated edge part (N) (N) is weak, and therefore the part has a curvature continuous with other parts.

Further, the rotary member fixing device having the above structure is a rotary member.
(R) is inserted between the boss (B) and the shaft (J), and when the rotating body fixture is tightened, the corrugated edge portion is
(N) Since (N) is in the meshed state, the opposed ends are not tightened in a state where they are axially displaced from each other.

[0013]

[Effects] The present invention having the above-described structure has the following unique effects. The inner ring (1) or the outer ring (2) has a wavy edge (N) (N), that is, the opposite end facing each other across the slit (S) and another part have a uniform curvature. Since it is bent, there is no concern that the opposite end will damage the inner peripheral surface of the boss (B) and the surface of the shaft (J) when the rotating body fixture is tightened.

Since the corrugated edge portions (N) and (N) are intermeshed with each other, when the rotating body fixing tool is tightened, the opposite end portions do not shift in the direction of the fixing tool axis line. The positions of the inner ring (1) and the outer ring (2) are wedge-shaped.
(31) Accurately contact the inner and outer tapered surfaces of (32). Therefore, the transmission torque is increased and the variation in the transmission torque due to the tightening mode can be eliminated.

It is possible to eliminate the inconvenience caused by the fact that both ends of the slit (S) facing each other remain straight, that is, the inconvenience that the rotating body and the shaft are eccentrically tightened. [Regarding the Invention of Claim 2] The invention of Claim 2 relates to a method for manufacturing a rotary member fixing tool of the invention of Claim 1, and the technical means adopted for this purpose is the "wedge body (31 )
(32) is manufactured by cutting, and inner ring (1) and outer ring (2)
Is a strip-shaped body of a constant length (N) (N), which has a cross-sectional shape similar to the final finished cross-section and both ends of which have the same shape of corrugated edges (N) (N) that engage with each other when facing each other. F)
Is rolled into a ring-shaped body that is partially open.

In the rotating body fixture manufactured by this method, the corrugated edge portions (N) (N) of the inner ring (1) and the outer ring (2) are bent to have substantially the same curvature as the other portions. Therefore, the operation and effect of the rotating body fixing device of the above-mentioned claim 1 can be obtained. [Invention of Claim 3] The invention of Claim 3 specifies the cross-sectional shape of the strip (F) of the invention of Claim 2 and the cross-sectional shape of one roll when the roll is bent, It is intended to prevent the meandering of the strip at the time of roll bending.

The structure specified for this purpose is that "a groove (G) is formed on the surface of the thick portion of the strip (F) on the side where the inclined surface (K) (K) is formed.
(11) is formed, and both ends of this groove forming part are corrugated edges (N)
(N) is located at the center of the ridge or valley and the width of the center ridge of the corrugated edge (N) is set larger than the width of the groove (11), and the roll is in contact with this. And an annular rib that is just fitted into the concave groove (11) is formed.

With this means, the rib of the roll exerts a guide function during roll bending, and when the strip (F) is inserted between the rolls, the strip is placed at a right angle to the roll. Since it is fed while maintaining, the meandering of the strip (F) during roll bending can be prevented.
Therefore, the flatness of both axial end portions of the inner ring (1) or the outer ring (2) is improved.

Further, when the inner ring (1) or the outer ring (2) is bent by a roll, there is no fear that the shape of the corrugated edge portions (N) (N) will lose its shape. There is no concern about inconvenience, that is, the distorted corrugated edges (N) (N) are intermeshed with each other and the deformed portions damage the contact surface.

[0020]

Embodiments of the present invention will be described below with reference to FIGS. The rotary member fixing tool of this embodiment is shown in FIGS.
As described above, it has the same shape as the conventional rotary body fixture described above, and among the constituent parts thereof, the wedge bodies (31) (32) are finished into the final shape by cutting or grinding, and the inner ring ( 1) or outer ring (2) is manufactured by rolling.

Since the wedge bodies (31) and (32) are manufactured by cutting as in the conventional case, the inner ring will be described below.
The method for manufacturing (1) and the outer ring (2) will be described in detail. First, the method of molding the inner ring (1) will be described. The cross-sectional shape of the inner ring (1) manufactured by this method is a trapezoidal cross-sectional shape with a groove (11) formed at the center apex, as shown in Figs. 2 and 4. Band (F)
The inclination angle of the inclined surface (K) (K) formed at both ends of the cross section of
As shown in the figure, it is set to be larger than the inclination angle of the tapered surface (T) with respect to the axis of the inner ring (1). In this method, the inner ring (1) is manufactured from a coiled product of the strip-shaped body (F) having the cross-sectional shape. Therefore, the strip (F) drawn from this coil is shaped into a straight line through the roller leveler, and the strip (F) is linearized to the circumference of the inner ring (1). Cut to a length slightly shorter than the matching length to make a standard length material for the inner ring (1) as shown in Fig. 2.

In this standard length material, corrugated edge portions (N) (N) of the same shape are formed at both ends. In this embodiment, since the concave groove (11) is formed at the center of the cross section, the corrugated edge portions (N) (N) have a central mountain portion (the central mountain portion having an apex of an arcuate portion at the center thereof). N ₁ ) or central valley with an arcuate bottom (N ₂ )
The width of the central peak portion (N ₁ ) and the central valley portion (N ₂ ) is set to about 1.5 to 3 times the width of the concave groove (11). The widths of the peaks and valleys on both sides thereof are set to be smaller than the width of the central peak (N ₁ ) or central valley (N ₂ ).

If the cut end face has large burrs or burrs when it is made into the standard length material, it is removed at this stage. Next, the band-shaped body (F) is roll-bent into a ring by using a roll-bending device. A roll bending device for bending the inner ring (1) uses a device as shown in FIGS. 1 and 3. In this device, a pair of lower rolls (51) (5
1) and an upper roll (52).

As shown in FIG. 3, the lower rolls (51), (51) are shaped to have an annular rib (50) in the center of a small diameter recess (53) and have a cross-sectional shape on the outer peripheral side of the inner ring (1). The cross-sectional shape corresponding to. The other upper roll (52) is a roll having a smooth surface. Further, in this roll bending apparatus, the lower rolls (51) (51) are integrally movable up and down. With this upper roll (52) in a driven state, the strip (F) cut to a fixed length as described above is used as a lower roll (51) (51) and an upper roll (52).
When inserted between and, the strip (F) is bent into an annular shape as shown in FIG. The corrugated edge portions (N) (N) face each other in a meshed state or a meshable state as shown in FIG. 7.

At this time, as disclosed in Japanese Examined Patent Publication No. 5-51382, the central portion of the strip (F) is bent in a rolled state in which it is pressed more strongly than the other. Particularly, in the inclined surface (K), the pressure is gradually and strongly applied from the thin portion to the thick portion. As a result, distortion or deformation of the cross section after roll bending can be prevented. In particular, in this embodiment, since the groove (11) is formed in the thick portion at the center of the strip (F), the groove (11) exhibits a guide function during roll bending. . That is, when the strip (F) of the standard length material is inserted between the lower roll (51) (51) and the upper roll (52), the lower roll (5
Since the annular ribs (50) (50) corresponding to the concave groove (11) on the (1) side fit into this concave groove (11), the ring shape of the completed inner ring (1) becomes accurate. . In addition, when cutting the strip (F) into a standard length material, there is a possibility that the both ends of the concave groove (11) may lose their shape, but in the roll bending process, this shape collapse is corrected and normal Is restored to its normal state.

Next, the outer ring (2) is also manufactured by the same method as that of the inner ring (1), but in this embodiment, the strip (F) having the same cross section as that of the above embodiment is used. , Set the length of the standard length material to be slightly shorter than the length that matches the circumference of the outer ring (2). As shown in FIG. 4, as the roll bending device, contrary to the case of the first embodiment, a small diameter recess (53) is formed in the upper roll (52), and the small diameter recess (53) is As shown in FIG. 5, the annular rib (50) and the inclined surface corresponding to the concave groove (11)
The outer surface of the outer ring (2) having the final finish shape is made to coincide with the cross section on the inner peripheral side of the outer ring (2) in a final finish shape. And in this case, contrary to the case of manufacturing the inner ring (1),
As shown by the solid line in the figure, the strip-shaped body (F) with the cross-sectional shape shown by the imaginary line is the state in which the thin portion side is strongly pressed, and the inclined surface (K)
To make a bend.

When the belt-like body (F) is bent into an annular shape in this manner, the outer ring (2) is completed, and as shown in FIG. 6, the corrugated edge (N) is formed.
(N) faces the meshed state or the meshable state. In the above embodiment, the lateral width of the central peak portion (N ₁ ) and the central valley portion (N ₂ ) is set to about 1.5 to 3 times the width of the concave groove (11). And the depth is set to the extent that the guide function is exerted, the width of the groove (11) is 1.5
If it is less than double, the shape of the concave groove (11) becomes large when the corrugated edge (N) is punched out, and the accuracy of the shape after the completion of roll bending becomes insufficient. Also, the width of the groove (11) is 3
If it is set to be larger than double, the bending curvature of the central mountain portion and the bending curvature of other portions become small.

In the above embodiment, the inner ring (1) and the outer ring (2) are roll-molded by the band-shaped body (F) having the groove (11) at the center. It is also possible to use a band-shaped body that does not include In this case, as shown in FIG. 8, the peaks and valleys of the corrugated edge portions (N) (N) may be set to have the same shape. Also, the shape of each corrugated edge (N) does not necessarily have to be bilaterally symmetrical with respect to the horizontal width center of the standard length material of the strip (F). The finishing accuracy after bending is improved.

The widths of the peaks and valleys of the corrugated edge portion (N) are determined by the strength of the cutting die used to cut the strip (F) into a standard length material. Maximum wall thickness of F) is 3.
When the width is about 5 mm, the width is appropriately about 4 mm. In order to make the bending curvature of the corrugated end portion (N) at the time of roll bending coincide with that of the other portion, the height of the peak portion should be at least 3 times the wall thickness of the strip (F). About twice as much is needed.

[Brief description of drawings]

FIG. 1 is an explanatory view of a roll bending process according to an embodiment of the present invention.

[Fig. 2] Perspective view of a standard length material obtained by cutting the strip (F) into the circumferential length of the inner ring (1) or the outer ring (2).

FIG. 3 is a detailed view of essential parts of the roll bending apparatus shown in FIG.

FIG. 4 is an explanatory diagram of a roll bending process for bending the outer ring (2).

[Figure 5] Detailed view of this bending part

FIG. 6 is a plan view of an external fitting of the rotating body fixing tool of the present invention.

FIG. 7 is a sectional view thereof.

FIG. 8 is an explanatory diagram of another shape of the corrugated edge portion (N) (N).

FIG. 9 is a conventional explanatory view of a rotating body fixing tool which is an object of the present invention.

[Explanation of symbols]

 (1) ・ ・ ・ Shaft clamp (2) ・ ・ ・ Boss clamp (T) ・ ・ ・ Tapered surface (F) ・ ・ ・ Strip (J) ・ ・ ・ Shaft (B) ・ ・ ・ Boss (N) ... Corrugated edge

Claims (4)

[Claims] 1. A taper surface (T) whose inner end face has a radial width smaller than that of the outer end face and whose inner and outer peripheries are substantially symmetrical to each other.
(T) A pair of endless ring-shaped wedges (31) and (32) are arranged opposite to each other, and an inner ring (1) and an outer ring (2) partially provided with axial slits (S) are provided. The wedge body (31) (32) is individually taper-fitted on the inner peripheral side and the outer peripheral side, and the wedge body is tightened in the axial direction by a plurality of tightening bolts (4) (4) to axially rotate the inner ring (1).
In the rotating body fixture in which the outer ring (2) is pressed to the boss (B) side on the (J) side, the wedge bodies (31) and (32) shall be manufactured by cutting or grinding, and the inner ring (1 ) And outer ring
(2) is a partially open annular body formed by bending the belt-like material in an annular shape, and the opposing end portions facing each other across the slit (S) of the inner ring (1) and the outer ring (2) are A rotary member fixing tool having wavy edge portions (N) (N) of substantially the same shape that engage with each other. 2. A taper surface (T) in which the width of the inner end face in the radial direction is smaller than that of the outer end face and the inner and outer peripheries are substantially symmetrical to each other.
(T) A pair of endless ring-shaped wedges (31) and (32) are arranged opposite to each other, and an inner ring (1) and an outer ring (2) partially provided with axial slits (S) are provided. The wedge body (31) (32) is individually taper-fitted on the inner peripheral side and the outer peripheral side, and the wedge body is tightened in the axial direction by a plurality of tightening bolts (4) (4) to axially rotate the inner ring (1).
In the manufacturing method of the rotating body fixture in which the outer ring (2) is pressed to the boss (B) side on the (J) side, the wedge body (31) (32)
Are manufactured by cutting or grinding, and the inner ring (1) and outer ring are
(2) is a corrugated edge (N) (N) of the same shape that has a cross-sectional shape similar to the final finished cross-section and has a cross-sectional shape that meshes with each other when both ends face each other. Band
A method for producing a rotating body fixture, which is an annular body partially opened by rolling (F) while slightly rolling it. 3. A groove (11) is formed on the surface of the thick member (F) on the side where the inclined surface (K) (K) is formed, and both ends of this groove forming portion are corrugated edges. (N) is located at the center of the ridge or valley of (N), and the width of the center ridge of the corrugated edge (N) is set to the width of the groove.
3. The method for manufacturing a rotating body fixing tool according to claim 2, wherein the width is set larger than the width of (11), and an annular rib which is just fitted into the concave groove (11) is formed in a roll which is in contact with the width. 4. The corrugated edge portions (N) (N) have a central peak portion (N ₁ ) having a top of an arcuate portion at the center thereof or a central valley portion (N ₂ ) having an arcuate bottom portion. 4. The width of the central peak portion (N ₁ ) and the central valley portion (N ₂ ) is set to about 1.5 to 3 times the width of the concave groove (11). A method for manufacturing the rotating body fixture according to.