JP2006234064A - Mounting structure of rotating shaft to rotating member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide mounting structure of a rotating shaft to a rotating member which is easy in concentricity of the rotating shaft and the rotating member and does not damage the rotating shaft by screw implement or the like. <P>SOLUTION: The mounting structure of a rotating shaft to a rotating member is formed with a recessed part 11 on both ends of a through hole 10 of the rotating member 3 and is formed with a female screw 15 on internal surface of the recessed part 11 and is formed with a hole part 30 which penetrates the rotating shaft 2 on fastening member 3 and is formed on outer periphery of the fastening member 3 with a male screw 31 which can be threadably engaged with the female screw 15 of the rotating member 1. The fastening member 3 is divided into a plurality of split bodies 33 by a divided groove 32 directing from head toward axial direction. The plurality of the split bodies 33 are connected with bottom of the fastening member 3. The male screw 31 of the fastening member 3 threadably engages with the female screw 15 of the recessed part 11 by disposing the fastening member 3 on the recessed part 11 of the rotating member 1 and then turning the head and at the same time the hole part 10 of the fastening member 3 is reduced in diameter and thereby the fastening member is fastened to the rotating shaft 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure for accurately attaching a rotating shaft to rotating members such as gears, pulleys, rollers, and drums.

Conventionally, when fixing a rotating shaft to a through-hole formed in a rotating member, a method of providing a screw hole directly in the rotating member and stopping rotation with a key or the like, both ends of the rotating member as shown in FIG. A method of fixing the fixing portion 6 to the rotating shaft 2 by passing the rotating shaft 2 through the fixing shaft 6 and screwing the screw 4 into a radial screw hole provided in the fixing portion 6, or, for example, As shown in Japanese Patent No. 131976 (Patent Document 1), there has been proposed a method of fixing a rotating shaft to a rotating member by fitting a rotating body fixture to the rotating shaft and tightening a tightening bolt. However, adopting this method has the following disadvantages:
(1) It is necessary to process a rotation stop such as a key on the rotating member.
(2) When a rotating member is attached with a screw or the like perpendicular to the rotating shaft, it is difficult to obtain concentricity between the rotating shaft and the rotating member.
(3) The rotating shaft may be damaged by a screw tool or the like.
Japanese Patent Laid-Open No. 10-131976

  SUMMARY OF THE INVENTION An object of the present invention is to provide a structure for attaching a rotating shaft to a rotating member, in which the concentricity between the rotating shaft and the rotating member is easy and the rotating shaft is not damaged by a screw tool or the like.

  The rotating shaft mounting structure to the rotating member of the present invention is such that the rotating shaft is inserted into a through-hole formed in the rotating member, the fixing member is externally fitted to the rotating shaft, and the fixing member is screwed to the rotating member. By combining, the rotating shaft is attached to the rotating member, and the rotating shaft is fixed to the rotating member. Concave portions are formed at both ends of the through hole of the rotating member, and a female screw is formed on the inner surface of the recessed portion. A hole through which the rotating shaft passes is formed in the fixing member, a male screw that can be screwed into a female screw of the rotating member is formed on an outer periphery of the fixing member, and a taper is formed in the female screw of the fixing member And a taper that fits the taper of the male screw is formed in the female screw formed in the recess of the rotary member, and the fixing member is divided into a plurality of divisions by dividing grooves from the head to the axial direction. Divided into a body, and a plurality of divided bodies are connected at the bottom of the fixing member, and the fixing member By disposing the rotating member in the concave portion and turning its head, the male screw of the fixing member is screwed into the female screw of the concave portion, and the hole of the fixing member is reduced in diameter so that the fixing member is fixed to the rotating shaft. This achieves the above objective.

  In one embodiment, the head of the fixing member is formed in a hexagon.

  In one embodiment, the fixing member is divided into three parts.

  In one embodiment, the rotating member is a gear, a pulley, a roller, or a drum.

  Concave portions are formed at both ends of the through hole of the rotating member, a female screw is formed on the inner surface of the concave portion, a hole portion through which the rotating shaft passes is formed in the fixing member, and an outer periphery of the rotating member is formed on the outer periphery of the fixing member. A male screw that can be screwed to the female screw is formed, the fixing member is divided into a plurality of divided bodies by a dividing groove directed in the axial direction from the head, and the plurality of divided bodies are connected at the bottom of the fixing member, By positioning the fixing member in the concave portion of the rotating member and turning its head, the male screw of the fixing member is screwed into the female screw of the concave portion, and the hole of the fixing member is reduced in diameter so that the fixing member is rotated on the rotating shaft. Since the inner diameter of the fixing member becomes smaller as the fixing member is screwed to the fixing member, the fixing member is screwed into the concave portion of the rotating member, and at the same time, the fixing member is pressure-bonded to the rotating shaft.

Therefore, there are the following advantages.
(1) There is no need to process a rotation stop such as a key on the rotating member as in the prior art.
(2) The concentricity of the rotating shaft and the rotating member is easily obtained as compared with the method of attaching the rotating shaft with bolts and nuts perpendicular to the rotating shaft.
(3) There is no need to process the rotating shaft.
(4) Since the through hole of the rotating member does not affect the concentricity even if the clearance is large with respect to the rotating shaft, the rotating member can be easily attached and detached.
(5) Compared with the method of attaching a rotating member with a bolt or nut to the rotating shaft, the possibility of damaging the rotating shaft is low.

  Embodiments of the present invention will be specifically described below.

  As shown in FIGS. 1 and 2, the rotation member 1 is formed with a through hole 10 at the rotation center position, and the rotation shaft 2 is inserted into the through hole 10.

  Concave portions 11 are formed at both ends of the through hole 10 of the rotating member 1. A taper that narrows toward the back side is formed on the inner surface of the recess 11, and a female screw 15 is formed on the taper surface 12.

  A hole 30 through which the rotation shaft 2 passes is formed at the rotation center position of the fixing member 3 formed of metal or hard resin. The inner diameter of the hole 30 is set to be slightly larger than the outer diameter of the rotary shaft 2 and the outer inner diameter is set to be slightly larger. A male screw 31 that can be screwed into the female screw 15 of the recess 11 of the rotating member 1 is formed on the outer periphery of the fixing member 3. The fixing member 3 is divided into a plurality of divided bodies 33 by dividing grooves 32 extending in the axial direction from the head thereof, and the plurality of divided bodies 33 are connected to the bottom of the fixing member 3. That is, the dividing groove 32 is formed from the head to the bottom. The dividing groove 32 can be formed by performing a slitting process such as a collet chuck. In this embodiment, the fixing member 3 is divided into three by the three dividing grooves 32, but it may be divided into four or five or more. The head of the fixing member 3 is formed in a hexagon, and the body 35 excluding the head is formed in a substantially cylindrical shape. The male screw 31 is formed on the outer periphery of the body portion 35 as described above, and the taper is formed so that the outer shape becomes smaller toward the bottom portion.

  When the outer diameter of the rotating shaft 2 is L1 and the inner diameter of the fixing member 3 is L2 (rotating member side) to L3 (on the opposite side to the rotating member), L2 is set equal to or larger than L1 and L3 is set larger than L2. ing. Further, when the outer diameter of the bottom portion of the fixing member 3 is L10, the outer diameter of the body portion on the head side is L11, the inner diameter of the inner side of the concave portion 11 is L12, and the inner diameter of the outer side of the concave portion 11 is L13, L10 from L12 Are substantially equal to or greater than L13, and L11 is set equal to or greater than L13.

  The rotation shaft 2 is fixed to the rotation member 1 as follows.

  The fixing member 3 is externally fitted to the rotating shaft 2, the fixing member 3 is disposed in the concave portion 11 of the rotating member 1, and the head 36 is rotated, whereby the male screw 31 of the fixing member 3 is turned into the female screw 15 of the concave portion 11. Screw together. As the hole 30 is screwed, the diameter of the hole 30 of the fixing member 3 is reduced, so that the width of the dividing groove 32 is reduced, and the fixing member 3 is fixed to the outer surface of the rotary shaft 2 by pressure bonding. The fixing member 3 is fastened from both end faces of the rotating member 1 and fixed to the rotating shaft 2.

  The rotating member 1 includes, for example, a gear, a pulley, a roller, or a drum.

  The above configuration has the following advantages.

  The rotating member 1 does not need to be processed such as a rotation stopper such as a key. The concentricity of the rotating shaft 2 and the rotating member 1 can be easily obtained as compared with a method of attaching with a bolt or nut perpendicular to the rotating shaft 2. There is no need to process the rotating shaft 2 in particular. Since the through hole of the rotating member 1 does not affect the concentricity even if the clearance with respect to the rotating shaft 2 is large, the attaching and detaching of the rotating member 1 is easy. Compared to the method of attaching the rotating shaft 2 with bolts or nuts, the possibility of damaging the rotating shaft 2 is low.

FIG. 1 is a cross-sectional view of an essential part of a structure for attaching a rotating shaft to a rotating member according to an embodiment of the present invention. FIG. 2 is a plan view of the fixing member shown in FIG. It is the schematic of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating member 2 Rotating shaft 3 Adhering member 10 Through hole 11 Recess 30 Hole 32 Dividing groove 33 Dividing body

Claims (4)

Insert the rotating shaft into the through hole formed in the rotating member,
A mounting structure of the rotating shaft to the rotating member that fixes the rotating shaft to the rotating member by externally fitting the fixing member to the rotating shaft and screwing the fixing member to the rotating member,
Concave portions are formed at both ends of the through hole of the rotating member, and female threads are formed on the inner surface of the concave portion.
A hole for passing the rotating shaft is formed in the fixing member, a male screw that can be screwed into the female screw of the rotating member is formed on the outer periphery of the fixing member, and a taper is formed on the female screw of the fixing member. And a taper that matches the taper of the male screw is formed in the female screw formed in the recess of the rotating member,
The fixing member is divided into a plurality of divided bodies by dividing grooves directed from the head in the axial direction, and the plurality of divided bodies are coupled at the bottom of the fixing member,
By positioning the fixing member in the concave portion of the rotating member and turning its head, the male screw of the fixing member is screwed into the female screw of the concave portion, and the hole of the fixing member is reduced in diameter so that the fixing member is rotated on the rotating shaft. A structure for attaching a rotating shaft to a rotating member fixed to a shaft. The mounting structure of the rotating shaft to the rotating member according to claim 1, wherein the head of the fixing member is formed in a hexagonal shape. The structure for attaching a rotating shaft to a rotating member according to claim 1, wherein the fixing member is divided into three parts. The structure for attaching a rotating shaft to the rotating member according to claim 1, wherein the rotating member is a gear, a pulley, a roller, or a drum.

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