초록 ▼

An outer sleeveless type resilient bush wherein a resilient body fixed to the outer circumference of an inner sleeve is brought into contact with the inside face of a support hole of an article to be supported, an inserted sleeve being embedded in the resilient body, axial notches and split grooves

An outer sleeveless type resilient bush wherein a resilient body fixed to the outer circumference of an inner sleeve is brought into contact with the inside face of a support hole of an article to be supported, an inserted sleeve being embedded in the resilient body, axial notches and split grooves are respectively formed on the inserted sleeve and the resilient body. flanges that bend in the diametrically outwards direction are formed at both ends of the inserted sleeve, and arranged to extend outwards in the diametrically outwards direction and the flange at one end is made capable of reduction in diameter, so that the resilient bush can be inserted into the support hole from the side of this flange, and resistance to withdrawal from the support hole can be increased and performance is improved by making the initial compression ratio of the resilient body large.

대표청구항 ▼

1. A resilient bush used to, by fitting into a support hole formed in an article to be supported, resiliently support the article comprising:an inner sleeve; a resilient body that directly contacts the inside face of the support hole and is fixed to the outer circumference of the inner sleeve; and a

1. A resilient bush used to, by fitting into a support hole formed in an article to be supported, resiliently support the article comprising:an inner sleeve; a resilient body that directly contacts the inside face of the support hole and is fixed to the outer circumference of the inner sleeve; and an inserted sleeve embedded in a diametrically intermediate part of the resilient body, characterized in that flanges bent in a diametrically outwards direction are formed at both ends of the inserted sleeve, the flanges at both ends extending in the diametrically outwards direction from a projection plane in an axial direction of the support hole in a condition in which the resilient bush is fitted into the support hole and a notch extending in a tubular portion of the inserted sleeve is formed in at least part, in the circumferential direction, of the flange at one end such that the flange at one end being capable of being reduced in diameter, the flange at one end being one of the flanges at both ends which is positioned at the leading end of the resilient bush in a direction of insertion of same with respect to the support hole. 2. The resilient bush according to claim 1, characterized in that a split groove reaching the end face of the leading end in said direction of insertion is formed in said resilient body in the same phase as said notch, and this split groove and said notch are respectively formed in shapes expanding in width towards the leading end in said direction of insertion.3. The resilient bush according to claim 1 or 2, characterized in that said flange at one end is formed in elliptical shape with the short-diameter dimension being less than the hole diameter of said support hole and said notch is formed on both sides in the short-diameter direction of this flange.4. The resilient bush according to claim 1 or 2, characterized in that a projection is formed projecting in the diametrical direction in a portion of the outer circumferential surface of said resilient body on the opposite side to that of the leading end in said insertion direction.5. The resilient bush according to claim 1 or 2, characterized in that a location where said flange at one end is subjected to grasp during vulcanizing molding of said resilient body is offset in the circumferential direction from a portion coinciding with the direction of reduction of diameter of this flange at one end.6. A resilient bush used to, by fitting into a support hole formed in the article to be supported, resiliently support the article, comprising:an inner sleeve; a resilient body having a tubular portion that directly contacts the inside face of the support hole and is formed with leg portions fixed to the inner sleeve at the inner circumference of an intermediate portion in an axial direction of the tubular portion; and an inserted sleeve embedded in the tubular portion of the resilient body, characterized in that flanges bent in a diametrically outwards direction are formed at both ends of the inserted sleeve, the flanges at both ends extending in the diametrically outwards direction from a projection plane in the axial direction of the support hole in a condition in which the resilient bush is fitted into the support hole; and a notch extending in a tubular portion of the inserted sleeve is formed in at least part, in a circumferential direction, of the flange at one end such that the flange at one end is capable of being reduced in diameter, the flanges at one end being one of the flanges at both ends which is positioned at the leading end of the resilient bush in the direction of insertion of same with respect to the support hole and in that a diametrical stopper portion is provided on one of the inner sleeve and the tubular portion of the resilient body that restricts reduction in diameter by abutting the other of the inner sleeve and the tubular portion of the resilient body when the flange at one end is reduced in diameter. 7. A resilient bush used to, by fitting into a support hole formed in an article to be supported, resiliently support the article to be supported, comprising:an inner sleeve; a resilient body having a tubular portion that directly contacts the inside face of the support hole and is formed with leg portions fixed to the inner sleeve at the inner circumference of an intermediate portion in an axial direction of the tubular portion; and an inserted sleeve, embedded in the tubular portion of the resilient body, characterized in that flanges bent in a diametrically outwards direction are formed at both ends of the inserted sleeve, the flanges at both ends extending in the diametrically outwards direction from a projection plane in the axial direction of the support hole in a condition in which the resilient bush is fitted into the support hole; and a notch extending in a tubular portion of the inserted sleeve are formed in at least part, in a circumferential direction, of the flange at one end such that the flange at one end is capable of being reduced in diameter, the flange at one end being one of the flanges at both ends which is positioned at the leading end of the resilient bush in the direction of insertion of same with respect to the support hole, and in that a split groove in the same phase as said notch and that reaches the end face at the leading end in said direction of insertion are formed in the tubular portion of the resilient body, a wedge member being provided that fit into the split groove. 8. A method of pressure-insertion, into a support hole, of a resilient bush used to, by fitting into a support hole formed in an article to be supported, resiliently support the article, the resilient bush comprising:an inner sleeve; a resilient body that directly contacts the inside face of the support hole and is fixed to the outer circumference of the inner sleeve; and an inserted sleeve embedded in a diametrically intermediate part of the resilient body, in which flanges are formed at both ends of the inserted sleeve, extending in an diametrically outwards direction from a projection plane in an axial direction of the support hole in a condition in which the resilient bush is fitted into the support hole; and a notch extending in a tubular portion of the inserted sleeve is formed in at least part, in a circumferential direction, of the flange at one end such that the flange at one end is capable of being reduced in diameter, the flange at one end being one of the flanges at both ends which is positioned at the leading end of the resilient bush in a direction of pressure-insertion of same with respect to the support hole, characterized in that an annular diameter reduction guide, whose internal diameter reduces with approach to the support hole, is arranged at an aperture face on an inlet side of the support hole of the article to be supported, and said flange at one end of the inserted sleeve is arranged to be guided into the support hole by diameter reduction performed by pressing the flange into the diameter reduction guide; and the diameter reduction guide is constituted by a plurality of segments that can be opened and closed in the diametrical direction, these segments being opened in the diametrical direction after pressure-insertion of the resilient bush. 9. A method of pressure-insertion, into a support hole, of a resilient bush used to, by fitting into a support hole formed in an article to be supported, resiliently support the article, the resilient bush comprising:an inner sleeve; a resilient body that directly contacts the inside face of the support hole and is fixed to the outer circumference of the inner sleeve; and an inserted sleeve embedded in a diametrically intermediate part of the resilient body, in which flanges are formed at both ends of the inserted sleeve, extending in a diametrically outwards direction from a projection plane in an axial direction of the support hole in a condition in which the resilient bush is fitted into the support hole; and a notch extending in a tubular portion of the inserted sleeve is formed in at least part, in a circumferential direction, of the flange at one end such that the flange at one end is capable of being reduced in diameter, the flange at one end being one of the flanges at both ends which is positioned at the leading end of the resilient bush in the direction of pressure-insertion of same with respect to the support hole, characterized in that an annular diameter reduction guide is arranged at an aperture face on the inlet side of the support hole of the article to be supported, guide projections, the amount of whose projection diametrically inwards increases with approach to the support hole, being provided at a plurality of locations in the circumferential direction of the inner circumference of the diameter reduction guide, said flange at one end of the inserted sleeve being arranged to be guided into the support hole by diameter reduction performed by the guide projections by pressing the flange into the diameter reduction guide; and recesses are formed at a plurality of locations in the circumferential direction in the same phase as the guide projections in the flange at the other end of the inserted sleeve, the diameter reduction guide being arranged to be separated in the axial direction such that the guide projections pass through the recesses after pressure-insertion of the resilient bush. 10. A method of pressure-insertion, into a support hole, of a resilient bush used to, by fitting into a support hole formed in the article to be supported, resiliently support the article, the resilient bush comprising:an inner sleeve; a resilient body that directly contacts the inside face of the support hole and is fixed to the outer circumference of the inner sleeve; and an inserted sleeve embedded in a diametrically intermediate part of the resilient body, in which flanges are formed at both ends of the inserted sleeve, extending in a diametrically outwards direction from a projection plane in an axial direction of the support hole in a condition in which the resilient bush is fitted into the support hole; and a notch extending in a tubular portion of the inserted sleeve is formed in at least part, in a circumferential direction, of the flange at one end such that the flange at one end is capable of being reduced in diameter, the flange at one end being one of the flanges at both ends, positioned at the leading end of the resilient bush in a direction of pressure-insertion of same with respect to the support hole, characterized in that a practically U-shaped diameter reduction guide is arranged at an aperture face on the inlet side of the support hole of the article to be supported, whose internal diameter decreases as the support hole is approached and which opens on one side in the diametrical direction matching said notch, guidance into the support hole being effected by diameter reduction of said flange at one end of the inserted sleeve by pressing the flange into the diameter reduction guide and; the diameter reduction guide being arranged to be separated in the direction opposite to the direction of opening of this guide after pressure-insertion of the resilient bush. 11. A method of pressure-insertion, into a support hole, of a resilient bush used to, by fitting into a support hole formed in an article to be supported, resiliently support the article to be supported, the resilient bush comprising:an inner sleeve; a resilient body that directly contacts the inside face of the support hole and is fixed to the outer circumference of the inner sleeve; and an inserted sleeve embedded in a diametrically intermediate part of the resilient body, in which flanges are formed at both ends of the inserted sleeve, extending in a diametrically outwards direction from a projection plane in an axial direction of the support hole in a condition in which the resilient bush is fitted into the support hole; and a notch extending in a tubular portion of the sleeve insert is formed in at least part, in a circumferential direction, of the flange at one end such that the flange at one end is of the flange at one end such that the flange at one end is capable of being reduced in diameter, the flange at one end being one of the flanges at both ends which is positioned at the leading end of the resilient bush in the direction of pressure-insertion of same with respect to the support hole, characterized in that the aperture face on the outlet side of the support hole of the article to be supported is contacted to a fixing jig so as to receive the pressure-insertion load of the resilient bush a concavity being formed in the fixing jig that receives said flange, at one end of the inserted sleeve, when this is extruded from the outlet of the support hole on completion of pressure-insertion of the resilient bush, this concavity being formed in elliptical shape whose long-diameter direction is a direction parallel with the width direction of said notch.