JP2013079679A - Fixing ring for fixing rings to shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing ring by which tensile stress is concentrated when fixing rings such as bearings, and which does not use a fastening screw having individual differences at fastening work, or does use even a wedge which requires a wide-width cut clearance causing the lowering of rotation balance and is troublesome in storage.SOLUTION: The fixing ring 5 is radially cut at a portion of a ring body 6, the inside diameter of the ring body 6 is smaller than the outside diameter of the shaft 1, the fixing ring penetrates one cut face 11 of a cut, and the fixing ring has a clearance adjusting screw 25 whose tip can contact with the other cut face 12. The inside diameter of the ring body 6 is expanded until the ring body 6 can be fit into the shaft 1 by the progress of the clearance adjusting screw 25, the inside diameter of the ring body 6 is liable to be contracted more than the outside diameter of the shaft 1 by the contraction of the clearance adjusting screw 25, thus the shaft 1 is braced by the ring body 6, and the fixing ring 5 is fixed to the shaft 1 in a prescribed position in the axial direction.

Description

  The present invention relates to a fixing ring that holds and fixes rings on a shaft.

  First, a description will be given of a case where a radial ball bearing which is most expected to be used in practice of the present invention and has been a motivation for the present invention is fixed to a shaft.

  In order to fix the inner ring of the radial ball bearing to the shaft, the most commonly used method in the past is press-fitting. This is because press fitting does not damage the shaft, and the concentricity between the shaft and the bearing is reliable and the rotation balance is good, so that vibration during operation is small, work in the factory is easy, and it is suitable for mass production. In some cases, shrink fitting is also adopted, and the same advantages as press fitting are recognized.

  However, it is difficult or impossible to press-fit or shrink-fit in individual bearing installation sites as in the case where the bearing inner ring in the bearing housing is fixed to the shaft.

  First, a method for fixing the bearing inner ring in the bearing housing to the shaft, which has been conventionally employed, will be described.

  The most widely used method for fixing the inner ring to the shaft is the set screw method. In this method, the inner ring is extended in the axial direction, a screw hole is provided in the inner ring, and the tip of the screw threaded through the screw hole is firmly pressed against the shaft to fix the inner ring extension to the shaft. . This method is easy to work, but the shaft is damaged by the screw tip and the concentricity between the inner ring and the shaft cannot be obtained. It is not uncommon for the inner ring extension to crack after that.

  There is an adapter method as a method that has been conceived in order to avoid the damage of the shaft by the screw in the set screw method and the eccentric fixation between the inner ring and the shaft. In this method, an inner side of the inner ring is tapered in the axial direction, the same taper as the outer side of the inner ring is attached on the outer side, and a ring called an adapter is cut between the inner ring and the shaft. Pulling the adapter by tightening screws that are cut parallel to the small diameter end of the adapter and narrowing the slit width allows the outer surface of the adapter to be crimped to the inner ring, and at the same time, the adapter inner surface is used as a shaft. In this method, the bearing is fixed to the shaft as a result. This method has the advantage that the concentricity between the bearing and the shaft can be obtained without damaging the shaft, but the structure is complicated and the manufacturing cost is expensive, so that the bearing can be used as in the case where high-speed rotation and vibration may occur. It has been adopted only when concentricity between the axis and the axis is particularly required.

  There has been a demand for a method that does not require a complicated structure like the adapter method, expensive production costs, does not damage the shaft, maintains the concentricity between the bearing and the shaft, is simple and reliable, and is inexpensive to produce.

  In response to this demand, there are the following methods that are currently favored and adopted mainly in the United States.

  In this method, the inner ring is extended in the axial direction with a small outer diameter, and a plurality of slits from the root to the tip are cut in the inner ring extension, and the inner ring is thinned by the slit. This is a method of fixing the bearing to the shaft by hugging the extension portion by some method and pushing it inward, and as a result, hugging the shaft with the inner ring thin wall extension portion. The inventor has called this method the slit extension method. The slit extension method can be applied not only to bearings but also to other rings. In this method, the shaft is not damaged, and the bearing is fixed to the shaft in a concentric state (see, for example, Patent Document 1, third column, lines 26 to 42, and FIGS. 1 to 4).

  This method was first introduced in the United States in Patent Document 1, but since then, this method has been improved slightly (see Patent Document 2 and Patent Document 3). In any of these methods, as a method of hugging the inner ring thin wall extension portion, a ring cut at one place is fitted into this, and this cut portion clearance is tightened with a screw passing through it to narrow it. However, the ring material on both sides of the cut portion into which the screw is fitted has a threaded screw hole on both sides (Patent Document 2, page 3, upper left column, line 20 to the same page, lower right) Column, line 7, or patent document 3, paragraphs [0028] to [0032], FIG. 1 and FIG. 2), and a case where a threaded screw hole is drilled only on one side into which a screw tip portion is inserted (patent) Reference 1, column 3, lines 34-38 and FIG. 4). Hereinafter, in this specification, in any case, it is simply referred to as a screw hole. In any case, it is easier and cheaper to manufacture than the adapter method.

  However, even with these methods, relatively large labor is required for screw tightening, tensile stress is concentrated on a screw cross section that is considerably smaller than the ring cross section, and the inner ring is not sufficiently fixed to the shaft due to insufficient screw tightening. In addition, there is a drawback that the screw itself may be damaged by overtightening the screw, and the trouble of drilling a screw hole over the ring material on both sides of the cut portion is troublesome and expensive, and these are Delaying the spread of methods.

  Next, as a method in which the above-described drawbacks are eliminated, a ring ring body and a wedge are formed, a part of the ring body is cut in the radial direction, and the shaft is hugged by reducing the clearance of the cut part. There is a fixing ring that fixes the lens in a predetermined position (see, for example, Patent Document 4, paragraphs [0027] to [0031], FIGS. 1 and 2). That is, in the invention described in Patent Document 4, a ring 70 cut at one place as shown in FIG. 10 attached to the present specification is used, and the inner diameter of this ring 70 is the outer diameter of the inner ring thin wall extension 72. Smaller than. When the wedge 75 is inserted into the gap of the cut portion of the ring 70 to increase the inner diameter of the ring within a range not exceeding the yield point of the ring material, the ring is fitted into the thin inner wall extension 72, and then the wedge 75 is removed. Is hindered by the outer periphery of the inner ring thin wall extension part and cannot be sufficiently reduced, so that stress remains in the ring material. With this residual stress, the ring 70 holds the shaft 1 via the inner ring thin-walled extension 72, and the bearing (not shown) is fixed to the shaft 1 in the state shown in FIG. 10.

  In the invention described in Patent Document 4, it is very easy to remove the wedge on site, there is no individual difference of the worker like screw tightening, and there is no need to drill a screw hole in the ring. Costs are even cheaper.

  However, in the invention described in Patent Document 4, since the wedge is inserted in advance with a press-fitting tool or may be driven in the field, as shown in FIG. 10 from the viewpoint of using a wedge that does not break. It is necessary to make the clearance of the cut part of the fixing ring wide. The wide cut part clearance causes an increase in vibration due to a decrease in rotational balance during operation of the bearing and turbulent airflow around the bearing. Further, it is troublesome to store the removed wedge that is necessary again in the field when reviewing the positional relationship between the bearing and the shaft or moving the bearing.

  When fixing rings, such as bearings, to the shaft, the concentricity of the two is maintained and the slit extension method (see paragraph [0010] of this application, paragraph) narrows the ring cut portion without damaging the shaft. However, the above-mentioned method, which is currently known due to the residual stress of the ring material, inserts a wedge in advance to widen the clearance of the cut portion in advance, so that the tensile stress on the small screw cross section by the conventional screw tightening method is reduced. Concentration, the influence of individual work differences, and the troublesomeness of screw hole drilling in the ring have been removed, but the large clearance at the cut section reduces the rotational balance of the bearing in operation and increases vibration, and the surroundings Turbulent air flow, which is undesirable particularly at high-speed rotation, and since the wedge is removed during rotation, care must be taken when storing it. Also not a smart dressed wedge is caught in the ring at the time of the tube. In the ring material, it is desired not to use a screw having individual differences for concentration of tensile stress or tightening work, and not to use a wide cut portion clearance or a wedge that requires troublesome storage.

U.S. Pat. No. 3,276,828 JP 61-074913 A Registered Utility Model No. 3055655 Japanese Patent No. 4681974

  Accordingly, the present invention concentrates excessive tensile stress, does not use individual tightening screws for tightening work, and lowers the rotational balance during operation to cause vibration and ambient air turbulence. It is an object of the present invention to provide a fixing ring that fixes a ring that does not use a wedge that requires a wide cut portion clearance to the shaft.

  In order to solve the above problems, the shaft is clamped with a fixed ring that is cut at one place. Instead of tightening with a screw as in the conventional method, the screw is loosened and clamped without using a wedge. The following fixing ring with a small cut portion clearance was invented.

(1) In a fixing ring in which a part of an annular ring body is cut in the radial direction, the shaft is hugged by the ring body by reducing the clearance of the cut portion, and the rings are fixed at a predetermined position in the axial direction.
The inner diameter of the ring body is smaller than the outer diameter of the shaft,
A clearance adjustment screw that penetrates one cut surface of the cut portion and that has a tip that can contact the other cut surface,
The inner diameter of the ring main body is increased until the ring main body can be fitted into the shaft by advancement of the clearance adjusting screw, and the inner diameter of the ring main body is reduced from the outer diameter of the shaft by retreating the clearance adjusting screw. The ring body hugs the shaft,
A fixing ring for fixing the rings to the shaft.

(2) In a bearing fixing ring in which a part of the annular ring body is cut in the radial direction, the shaft is hung together with the bearing by the ring body by reducing the cut portion clearance, and the radial rolling bearing is fixed at a predetermined position in the axial direction
The bearing has a smaller outer diameter than the inner ring of the bearing and is thin, and has a plurality of slits extending in the axial direction from the end of the inner ring and extending in the axial direction from the end of the inner ring to the tip in the circumferential direction. With inner ring extension,
The bearing fixing ring includes a clearance adjusting screw that penetrates one cut surface of the cut portion and whose tip can contact the other cut surface, and an inner diameter of the ring body is twice the wall thickness of the inner ring extension portion And the sum of the outer diameters of the shafts,
By advancement of the clearance adjusting screw, the inner diameter of the ring main body is twice the wall thickness of the inner ring extension, the outer diameter of the shaft, and the sum of the fitting allowance between the shaft and the inner ring extension, The inner diameter of the ring main body is enlarged until it can be fitted into the extension, and the clearance adjustment screw is retracted so that the inner diameter of the ring main body is twice the wall thickness of the inner ring extension and the outer diameter of the shaft. The ring body hugs the shaft via the inner ring extension, trying to shrink more than,
A bearing fixing ring characterized by that.

(3) A part of the annular ring body is cut in the radial direction, and the transmission body is fixed at a predetermined position in the axial direction by hugging the transmission shaft together with the transmission body by the ring body by reducing the clearance of the cut portion. In the ring,
The transmission body has an outer diameter smaller than that of the hub of the transmission body and is thin, and a plurality of slits extending in the axial direction from the end of the hub and extending in the axial direction from the end of the hub to the tip are cut in the circumferential direction. Provided hub extension,
The transmission body fixing ring includes a clearance adjusting screw that penetrates one cut surface of the cut portion and has a tip that can come into contact with the other cut surface, and an inner diameter of the ring body is 2 times the thickness of the hub extension portion. Smaller than the sum of the double and the outer diameter of the transmission shaft,
By advancement of the clearance adjustment screw, the inner diameter of the ring body is larger than twice the wall thickness of the hub extension, the outer diameter of the transmission shaft, and the sum of the fitting allowance between the transmission shaft and the hub extension, The inner diameter of the ring main body is enlarged until it can be fitted into the hub extension, and the clearance adjustment screw is retracted so that the inner diameter of the ring main body is twice the thickness of the hub extension and the outer diameter of the transmission shaft. The ring body hugs the transmission shaft via the hub extension in an attempt to reduce the sum of
A transmission fixing ring characterized by that.

  (4) The fixing ring according to (1), wherein an object passing through the shaft is fixed at a predetermined position in the axial direction. Examples of the object that penetrates the shaft include a sprocket, a cam, a gear, and a bearing that are applied with an axial force.

  (5) The fixing ring according to (1), wherein the fixing ring itself is fixed to the shaft at a predetermined position in the axial direction.

  (6) The fixing ring according to (1), wherein the two shafts are connected at the ends of the shafts.

  (1) The use of the fixing ring according to the present invention eliminates the need for a relatively long screw where the tensile stress is concentrated, and further eliminates the need for drilling long screw holes over the ring portions on both sides of the cut portion, so that the individual can perform the screwing operation. The difference is gone. In addition, there is no need for a wide cut portion clearance for inserting a wedge (see comparison of FIGS. 1 and 10), and further, there is no need for wedge storage. Incidentally, for example, in the case of a fixing ring for a shaft diameter of 35 mm, the conventional wedge insertion type fixing ring requires a clearance of about 10 mm, but the fixing ring of the present invention only needs 1 mm.

  In addition, the manufacturing cost is lower compared with the conventional fixing ring to the shaft of the bearing that required a long screw by drilling a screw hole in the ring part on both sides of the cut part (see Patent Documents 1, 2, and 3). is there.

  (2) When the fixing ring according to the present invention is used to hug the inner ring thin wall extension portion by the slit extension method for fixing the bearing to the shaft, in addition to the effect described in (1), the above screw Is completely unloaded, and it is very safe because there is no individual difference in the screwing operation, and since the clearance of the cut part of the ring is extremely small, the rotation balance of the bearing is improved and vibration during rotation is reduced. Suppressed and less likely to generate turbulent airflow, especially in the case of high-speed rotation. Further, the manufacturing cost is low as in the case (1).

  (3) In addition to the effect described in (1), when the fixing ring according to the present invention is used for hugging the thin extension portion of the hub by the slit extension method for fixing the transmission body to the transmission shaft, (2) The effect is the same as that added to.

  (4) The effect described in (1) above is also obtained when the fixing ring of the present invention is used to fix an object that penetrates the shaft at a predetermined position in the axial direction.

  (5) Even when the fixing ring according to the present invention described in the above (1) is used as the shaft connection ring, the effect described in the above (1) is obtained.

It is a vertical front view of a fixing ring showing an embodiment of the present invention. It is a vertical side view of the fixing ring shown in FIG. It is a front view which shows the state which expanded the cut part clearance gap of the fixing ring of this invention, and was fitted in the axis | shaft. It is a front view which shows the state which reduced the cut part clearance of the fixing ring of this invention, and clamped the axis | shaft. It is a vertical front view which shows the state which fixed the bearing to the axis | shaft with the fixing ring of this invention. It is a vertical side view which shows the state which fixed the bearing to the axis | shaft with the fixing ring of this invention. It is a vertical side view which fixed the gear to the transmission shaft with the fixing ring of the present invention. It is the vertical side view which fixed the fixing ring of this invention to the axis | shaft as a positioning ring. It is a vertical side view of the fixing ring which connects 2 axes | shafts of this invention. It is a front view of the conventional fixing ring using a wedge.

  1 and 2 show a fixing ring in an unloaded state according to the present invention. FIG. 1 is a cross-sectional view taken along line 1-1 of FIG. 2, and FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. In these drawings, the outer peripheral surface 2 of the shaft 1 which is fitted into the fixing ring 5 and is intended to fix it is drawn with a chain line. In order to make the present invention easier to understand, the diameter of the outer peripheral surface 2 of the shaft 1, and hence the fastening allowance α, is exaggerated and greatly shown. 3 and FIG. 4 also exaggeratedly show the clearance between the outer peripheral surface of the shaft and the inner peripheral surface of the fixing ring, as in FIGS.

  The fixing ring 5 includes an annular ring body 6 and a clearance adjusting screw 25, and a part of the ring body 6 is cut in a radial direction at one place to form a cut portion clearance 10. A portion of the cut portion clearance 10 from the one surface 11 toward the rear is a shoulder portion 15. As shown in FIGS. 1 and 2, side frames 18 extend rearward from both side surfaces of the rear surface 17 of the shoulder portion 15. As shown in FIG. 2, the side frame 18 on both sides and the bottom of the space 22 form an upward U-shape. The shoulder 15 is provided with a screw hole 20 of a clearance adjusting screw 25 described below. The side frame 18 reinforces the shoulder 15 by supporting a backward force applied to the shoulder 15 by the advancement of the clearance adjustment screw 25. A space 22 immediately after the shoulder 15 is a space for operating the clearance adjusting screw 25.

The clearance adjusting screw 25 is screwed into the screw hole 20 of the shoulder portion 15. The head 26 of the clearance adjustment screw 25 is provided with a hexagonal hole 27, and the tip 28 is spherical. The distal end portion 28 penetrates one surface 11 (the distal end surface of the shoulder portion 15) of the cut portion clearance 10 and can contact the other surface 12 (a surface facing the surface 11). g ₀ represents the clearance of the cut portion when the ring body 6 is in an unloaded state. Make g ₀ as small as possible. For example, the thickness of a cutting tool or a gold saw may be used. Although not shown in these drawings, it is common to chamfer the inner peripheral corner surface of the fixing ring 5 so that it can be easily fitted into the shaft 1.

  Here, a method of fixing the fixing ring configured as described above to the shaft will be described with reference to FIGS. 3 and 4.

As shown in FIG. 3, the clearance adjusting screw 25 is rotated and advanced, and the other surface 12 of the cut portion clearance 10 is pushed by the screw tip 28. As a result, the cut portion clearance 10 is expanded with the lower end portion of the fixing ring 5 as a base point, and the fixing ring 5 is fitted into the shaft 1. In this state, the size of the cut portion clearance 10 is g ₁ , and a clearance β is generated between the outer peripheral surface 2 of the shaft 1 and the inner peripheral surface 8 of the fixing ring 5. Note that the shape of the clearance β changes due to the positional relationship of the fitting between the fixing ring 5 and the shaft 1 and the influence of distortion (a slightly oblong ellipse) generated in the fixing ring 5.

  The enlarged width of the cut portion clearance 10 is kept within a range in which the maximum stress generated in the fixing ring 5 does not exceed the vicinity of the yield point of the ring material that is governed by the diameter and section modulus of the fixing ring 5. For this reason, the screw head 26 is in contact with the shoulder rear surface 17 from the state in which the screw tip portion 28 is in contact with the cut portion clearance surface 12 (cut portion clearance 10 expansion start position) (the cut portion clearance 10 expansion restriction limit). The rotation angle of the screw is regulated by (position). The restriction value for the rotation angle is set in advance based on experimental results. Thereby, the advance distance of the screw front-end | tip part 28 is controlled reliably.

Next, as shown in FIG. 4, the clearance adjustment screw 25 is reversed and retracted, and the screw tip portion 28 is pulled away from the other surface 12 of the cut portion clearance 10. In the fixing ring 5, the cut portion clearance 10 is reduced with the lower end portion as a base point, and the size of the cut portion clearance 10 is g ₂ , which is smaller than the size g ₁ of the cut portion clearance 10. In this state, the upper part and the lower part between the outer peripheral surface 2 of the shaft 1 and the inner peripheral surface 9 of the fixing ring 5 are hugged. As a result, the fixing ring 5 holds the shaft 1 concentrically, and the fixing ring 5 is fixed to the shaft 1.

In FIG. 4, the left and right clearances γ _L and γ _R between the outer peripheral surface 2 of the shaft 1 and the inner peripheral surface 9 of the fixing ring 5 are greatly exaggerated, as described above (see paragraph [0033]). This is due to the fact that the difference α between the shaft radius and the fixed ring radius in FIG. 1 is exaggerated and drawn, and there is actually a gap that seems to appear as if it is crimped all around.

  5 and 6 show a bearing fixing ring 40 in which the radial ball bearing 30 is fixed to the shaft 1 by the slit extension method, which has been a motivation for the present invention. 5 is a sectional view taken along line 5-5 of FIG. 6, and FIG. 6 is a sectional view taken along line 6-6 of FIG.

  The radial ball bearing 30 is provided with an inner ring extension 34 that extends in the axial direction from the end of the inner ring and has a smaller outer diameter than the inner ring 32 of the radial ball bearing 30. The inner ring extension 34 has a plurality of slits 36 extending from the inner ring end to the tip in the axial direction at intervals in the circumferential direction. The bearing fixing ring 40 includes a clearance adjusting screw 25 that passes through one cut surface (the front end surface of the shoulder portion 46) of the cut portion described later. A part of the ring main body 41 is cut in the radial direction, and in a free state, the inner diameter is smaller than the sum of twice the wall thickness of the inner ring extension 34 and the outer diameter of the shaft 1. In order to facilitate the insertion of the fixing ring 40 into the inner ring extension 34, a chamfer 44 is provided on the surface of the fixing ring 40 facing the bearing inner ring 32 as shown in FIG.

  In the bearing fixing ring 40 configured as described above, the inner diameter of the ring body 41 is twice the wall thickness of the inner ring extension 34, the outer diameter of the shaft 1, and the shaft 1 and the inner ring extension. It expands and expands larger than the sum of the fitting allowance with 34. In this expanded state, the bearing fixing ring 40 is fitted into the inner ring extension 34. Next, the clearance adjustment screw 25 is retracted to reduce the inner diameter of the ring main body 41 so that the inner diameter of the inner ring extension 34 is smaller than the sum of the thickness of the inner ring extension 34 and the outer diameter of the shaft 1. The shaft 1 is hugged through. As a result, the radial ball bearing 30 is fixed to the shaft 1 at a predetermined position in the axial direction. The bearing may be a roller bearing instead of the radial ball bearing 30.

  The radial ball bearing 30 and the shaft 1 are not damaged, the eccentricity of both is not, and the clearance 10 (see FIG. 1) of the bearing fixing ring 40 during the operation of the bearing is minimized. Therefore, since the bearing rotation balance is excellent, vibration during operation is suppressed, and the surrounding air turbulence is extremely small, which is particularly effective for high-speed rotation. Since there is no failure due to excessive or insufficient screwing operation of the clearance adjustment screw 25, the operation is reliable, and the clearance adjustment screw 25 is always stored in the screw hole 20. In addition, the manufacturing cost is low due to the simple structure.

  FIG. 7 is a longitudinal sectional view showing an example in which a spur gear, which is one of transmission members, is fixed to a transmission shaft by the fixing ring of the present invention by the slit extension method.

  As shown in FIG. 7, the spur gear 58 has a hub having an outer diameter smaller than that of the spur gear hub 59 (hereinafter simply referred to as a hub), and extending in the axial direction from the end of the hub. An extension 60 is provided. The hub extension 60 is formed with a plurality of slits (not shown) extending in the axial direction from the hub end to the tip at intervals in the circumferential direction. The gear fixing ring 52 includes a clearance adjusting screw 25 penetrating one cut surface of a cut portion described later. A part of the ring main body 53 is cut in the radial direction, and in the free state, the inner diameter is smaller than the sum of twice the thickness of the hub extension 60 and the outer diameter of the transmission shaft 50. In order to facilitate the insertion of the gear fixing ring 52 into the transmission shaft 50, a chamfer 55 is provided on the surface of the gear fixing ring 52 facing the hub 59 as shown in FIG.

  The gear fixing ring 52 configured as described above has an inner diameter of the ring body 53 that is twice the wall thickness of the hub extension 60, an outer diameter of the transmission shaft 50, and the transmission shaft 50. It expands and expands larger than the sum of the allowance for fitting with the hub extension 60. In this expanded state, the gear fixing ring 52 is fitted into the hub extension 60. Next, the clearance adjustment screw 25 is retracted so that the inner diameter of the ring body 53 is reduced to be smaller than the sum of the thickness of the hub extension 60 and the outer diameter of the transmission shaft 50, and the ring body 53 is reduced to the hub extension 60. The transmission shaft 50 is hugged through. As a result, the spur gear 58 is fixed to the transmission shaft 50 at a predetermined position in the axial direction.

  Although the spur gear has been described above, there are a belt wheel and a sprocket as a transmission body in addition to the spur gear. In the present invention, the magnitude of the transmission torque of these transmission bodies is restricted to a relatively low torque that does not require a key or press-fitting due to the structure of the transmission body fixing ring.

  When fixing a transmission body such as gears, belt wheels, sprockets to the transmission shaft, there is no need to machine a keyway on the transmission shaft, which was essential in the conventional method, and there is no eccentricity between the fixing ring and the transmission shaft. Smooth rotation, easy installation and removal, and reliable.

  The extension 34, 60 of the inner ring or hub of the bearing or the transmission body is usually extended only on one side of the inner ring or the hub as shown in FIGS. When stability or particularly strong fixing strength is required, it can be extended to both sides, and both extensions can be similarly hugged by a fixing ring.

In addition, as in the case of FIGS. 5, 6, and 7, when the slit extension method is applied, a plurality of divided pieces by the plurality of slits of the bearing inner ring and the thin extension of the hub are separately pressed, Since the shaft is hugged, the clearances γ _L and γ _{R that} are recognized on the left and right of the shaft in FIG. 4 are generally not recognized.

  FIG. 8 shows a positioning ring (set collar) that fixes the fixing ring 40 itself to the shaft 1 at a predetermined position in the axial direction. The set operation on the shaft 1 and the set position change operation are simple and reliable.

  FIG. 9 shows a wide fixing ring that connects two shafts 64 and 65 at the ends of these shafts. The shaft coupling ring main body 67 includes a side frame 68 and a clearance adjusting screw 25 similar to the U-shaped side frame 18 shown in FIG. The connecting and removing operations of the shafts 64 and 65 are simple and reliable, and it is not necessary to process the screws for connecting the shafts to the ends of the two shafts 64 and 65. Further, a clearance adjusting screw may be separately provided in the vicinity of both end portions of these adjacent shafts, but this is generally not necessary. Note that. In order to facilitate the insertion of the shaft connection ring 66 into the shafts 64 and 65, chamfers 69 are provided on both ends of the inner peripheral surface of the shaft connection ring main body 67, respectively.

  When removing the holding ring that is hugged for diverting the fixing ring, etc., it is only necessary to advance the clearance adjustment screw to increase the inner diameter of the fixing ring. Since the clearance adjustment screw is always stored in the screw hole, there is no need to pay particular attention to storage.

  In many mechanical structures, the opposing surfaces are brought closer by a tightening operation for moving the screw forward, and the opposing surfaces are moved away by a returning operation for moving the screw backward, but the reverse is true in the present invention. Therefore, in the present invention, a reverse screw (left-hand screw) may be employed as the clearance adjustment screw for work feeling.

  Furthermore, in the field of using the fixing ring according to the present invention including bearings, mass production of the same kind is usually performed. Therefore, the regulation value described in the paragraph [0038] can be set by the following experiment without considering economic considerations.

  Prototype of a fixed ring of the desired dimensions, and in the unconstrained state, the range where the cut clearance expanded by screw advancement (see paragraph [0038]) returns to the original width by screw retraction, that is, yield point on the ring material It is to confirm that a dimension that can be fitted into the shaft and a fixing strength as required after fixing can be obtained by expanding the cut portion clearance within a range in which stress exceeding the vicinity does not occur.

  Further, since the fixing ring of Patent Document 4 uses a wedge, the cost for drilling a screw hole as in the fixing ring of the present invention is unnecessary, but the manufacturing cost of the wedge is required. Therefore, the production costs of the fixing ring of the present invention and the fixing ring of Patent Document 4 are not very different. However, as described above, when the fixing ring of the present invention is used for a bearing, the effect of improving the rotational balance during operation and the reduction of the surrounding air resistance, screw storage is easier and more reliable than wedge storage, and the screw in the screw hole It has the advantage that it is smarter in appearance than the protrusion of the wedge.

  However, as a precaution to ensure work, it is possible to visually confirm that the screw tip is separated from the side of the cut part of the ring body visually or through a thin plate when the screw is retracted and the fastening ring is finished. Highly desirable.

  The advantages of the above-described fixing ring of the present invention can be expected to promote the adoption of the slit extension method (see the present specification, paragraph [0010]), which has been lagging in popularity, particularly in the bearing industry.

DESCRIPTION OF SYMBOLS 1 Axis 5 Fixing ring 6 Fixing ring main body 7 Inner peripheral surface of the fixing ring in an unloaded state 8 Inner peripheral surface of the fixing ring in an expanded state 9 Inner peripheral surface of the fixing ring in a state where the shaft is clamped 10 Cut portion clearance 11 One side of the clearance of the cut part 12 The other side of the clearance of the cut part 15 Shoulder part 18 Side frame 20 Screw hole 22 Space 25 Clearance adjustment screw 26 Clearance adjustment screw head 27 Hexagon hole 28 Clearance adjustment screw tip 30 Radial ball Bearing 32 Bearing inner ring 34 Inner ring extension 36 Slit 40 Bearing fixing ring 41 Bearing fixing ring main body 46 Bearing fixing ring shoulder 48 Side frame 50 Transmission shaft 52 Gear fixing ring 53 Gear fixing ring main body 56 Gear fixing ring shoulder 57 Side Frame 58 Spur gear 59 Spur gear hub 60 Spur gear hub extension 64, 6 Axis 66 Axis coupling ring 67 axially connected ring body 68 side frame 70 conventional fixing ring 72 inner thin extension 75 wedge

Claims (6)

A part of the annular ring main body is cut in the radial direction, the shaft is hugged by the ring main body by reducing the cut portion clearance, and the ring is fixed at a predetermined position in the axial direction.
The inner diameter of the ring body is smaller than the outer diameter of the shaft;
A clearance adjustment screw that penetrates one cut surface of the cut portion and that has a tip that can contact the other cut surface,
The inner diameter of the ring body is expanded until the ring body can be fitted to the shaft by advancement of the clearance adjustment screw, and the inner diameter of the ring body is reduced from the outer diameter of the shaft by retreating the clearance adjustment screw. Trying to hug the shaft the ring body,
A fixing ring for fixing the rings to the shaft. In a bearing fixing ring in which a part of the annular ring body is cut in the radial direction, the shaft is hung together with the bearing in the ring body by reducing the clearance of the cut portion, and the radial rolling bearing is fixed at a predetermined position in the axial direction.
The bearing has a smaller outer diameter than the inner ring of the bearing and is thin, and has a plurality of slits extending in the axial direction from the end of the inner ring and extending in the axial direction from the end of the inner ring to the tip in the circumferential direction. With inner ring extension,
The bearing fixing ring main body includes a clearance adjusting screw that penetrates one cut surface of the cut portion and whose tip can be in contact with the other cut surface, and the inner diameter of the ring main body is 2 times the thickness of the inner ring extension portion. Smaller than the sum of the double and the outer diameter of the shaft,
Due to the advance of the clearance adjusting screw, the inner diameter of the ring main body is twice the wall thickness of the inner ring extension, the outer diameter of the shaft, and the sum of the fitting allowance between the shaft and the inner ring extension. The inner diameter of the ring main body is enlarged until it can be fitted into the extension, and the clearance adjustment screw is retracted so that the inner diameter of the ring main body is twice the wall thickness of the inner ring extension and the outer diameter of the shaft. The ring body hugs the shaft via the inner ring extension, trying to shrink more than,
A bearing fixing ring characterized by that. In the transmission body fixing ring in which a part of the annular ring body is cut in the radial direction, the transmission shaft is hugged together with the transmission body by reducing the clearance of the cut portion, and the transmission body is fixed at a predetermined position in the axial direction.
The transmission body has an outer diameter smaller than that of the hub of the transmission body, and has a thin wall. Provided hub extension,
The transmission fixing ring main body includes a clearance adjusting screw that penetrates one cut surface of the cut portion and that can be brought into contact with the other cut surface, and the inner diameter of the ring main body is the thickness of the hub extension portion. Smaller than the sum of twice and the outer diameter of the transmission shaft,
By advancement of the clearance adjustment screw, the inner diameter of the ring body is larger than twice the thickness of the hub extension, the outer diameter of the transmission shaft, and the sum of the fitting allowance between the transmission shaft and the hub extension, The inner diameter of the ring main body is enlarged until it can be fitted into the hub extension, and the clearance adjustment screw is retracted so that the inner diameter of the ring main body is twice the thickness of the hub extension and the outer diameter of the transmission shaft. The ring body hugs the transmission shaft via the hub extension in an attempt to reduce it from the sum of
A transmission fixing ring characterized by that.   The fixing ring according to claim 1, wherein an object penetrating the shaft is fixed at a predetermined position in the axial direction.   The fixing ring according to claim 1, wherein the fixing ring itself is fixed to the shaft at a predetermined position in the axial direction.   The fixing ring according to claim 1, wherein the two shafts are connected at the ends of the shafts.

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