WO2013140700A1 - 防振装置 - Google Patents
防振装置 Download PDFInfo
- Publication number
- WO2013140700A1 WO2013140700A1 PCT/JP2012/084191 JP2012084191W WO2013140700A1 WO 2013140700 A1 WO2013140700 A1 WO 2013140700A1 JP 2012084191 W JP2012084191 W JP 2012084191W WO 2013140700 A1 WO2013140700 A1 WO 2013140700A1
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- WIPO (PCT)
- Prior art keywords
- outer cylinder
- rubber
- cylindrical member
- peripheral surface
- cylinder part
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
- F16F1/3807—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type characterised by adaptations for particular modes of stressing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
- F16F1/3828—End stop features or buffering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
- F16F1/3863—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type characterised by the rigid sleeves or pin, e.g. of non-circular cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
Definitions
- the present invention relates to a vibration isolator, and more particularly to a vibration isolator capable of increasing the spring constant in the axial direction while reducing the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis.
- the inner cylinder member and the outer cylinder member are connected by a rubber base made of a rubber-like elastic body. It is required to reduce the spring constant.
- a spherical bulging portion 4 bulging outward in the radial direction is provided at an axially intermediate portion of the inner cylinder 1 (inner cylinder member).
- An anti-vibration bush 101 antioxidant-vibration device that forms an inner peripheral surface portion of the outer cylinder 2 (outer cylinder member) surrounding the bulging portion 4 into a concave spherical surface that is concentric with the convex spherical surface of the bulging portion 4.
- the rubber-like elastic body 3 (rubber base) is mainly formed between a convex spherical surface and a concentric concave spherical surface with respect to an input of displacement in the twisting direction. Since it can be deformed in the shearing direction, the spring constant in the twisting direction can be reduced.
- JP 2008-019927 paragraphs 0006, 0020, FIG. 1, etc.
- the conventional anti-vibration bushing 101 described above has a problem that it is not possible to sufficiently increase the spring constant in the axial direction while reducing the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis.
- the present invention has been made to solve the above-described problems, and is a vibration isolator capable of increasing the spring constant in the axial direction while reducing the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis.
- the purpose is to provide.
- the inner cylinder member having a spherical bulge that bulges radially outward, and the concave shape that is a concave spherical surface that surrounds the bulge of the inner cylinder member. Since it has an outer cylinder member having an inner peripheral surface and a rubber base that connects between the outer peripheral surface of the bulging portion of the inner cylindrical member and the concave inner peripheral surface of the outer cylindrical member, Thus, the rubber substrate can be deformed mainly in the shear direction. Therefore, there is an effect that the spring constant in the twisting direction can be reduced.
- the outer cylinder member is divided into two parts in the axial direction, the first outer cylinder part and the second outer cylinder part, and the concave inner peripheral surface and the second outer cylinder part in the first outer cylinder part.
- the first inner cylindrical portion and the second outer cylindrical portion are connected to each other between the concave inner peripheral surface of the outer cylindrical portion and the outer peripheral surface of the bulging portion of the inner cylindrical member by the first rubber portion and the second rubber portion, respectively. Is held and fixed by a cylindrical cylindrical member disposed on the outer peripheral side.
- the dividing surface of the first rubber portion and the dividing surface of the second rubber portion are separated in the axial direction so that there is a space between the dividing surfaces.
- the first outer cylinder part and the second outer cylinder part can be held and fixed by the cylindrical member.
- the shear component of the rubber substrate in the twisting direction and the rubber substrate in the direction perpendicular to the axis can be formed.
- the compression component of the rubber base in the axial direction can be ensured while suppressing the compression component.
- the first rubber portion and the second rubber portion do not need to be completely divided (divided) in the axial direction, and it is sufficient that the rubber base is divided in the axial direction at least on the outer cylinder member side. Therefore, the 1st rubber part and the 2nd rubber part may be connected by the inner cylinder member side (it does not need to be divided in the direction of an axis). That is, the first rubber part and the second rubber part may be connected by a part of the rubber base that covers the outer peripheral surface of the inner cylinder member.
- the maximum outer diameter of the bulging portion of the inner cylinder member is the first outer cylinder portion and the second outer cylinder. Since it is made larger than the minimum inner diameter at the axial end opening of the cylindrical portion, the pressure receiving area can be increased with respect to displacement in the axial direction, and the compression component of the rubber base can be secured. As a result, the effect of increasing the spring constant in the axial direction can be made remarkable while reducing the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis.
- the configuration according to claim 2 is the rubber in the axial direction.
- the shear component of the rubber base in the twisting direction and the compressive component of the rubber base in the direction perpendicular to the axis also increase, and thus cannot be employed.
- This is possible for the first time by forming a space between the dividing surface and the dividing surface of the second rubber part, thereby ensuring the compression component of the rubber base in the axial direction and the rubber in the twisting direction.
- the shear component of the substrate and the compression component of the rubber substrate in the direction perpendicular to the axis can be suppressed. That is, the spring constant in the axial direction can be increased while reducing the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis.
- the first rubber part and the second rubber part are prevented from peeling and cracking while There is an effect that preliminary compression in the radial direction (perpendicular to the axis) can be applied to the first rubber portion and the second rubber portion.
- the vibration isolator imparts a radial pre-compression to the rubber substrate in order to ensure its durability.
- the provision of the precompression in the radial direction to the rubber base is usually performed by drawing the outer cylinder member.
- the concave spherical surface and the concave spherical surface are not formed. A difference in thickness occurs between the portions and the thickness of the portion where the concave spherical surface is not formed becomes thick, so that drawing of the outer cylinder member becomes difficult.
- a plurality of concave grooves extending in the axial direction and having a depth equivalent to that of the concave spherical surface are formed on the inner peripheral surface of the outer cylinder member in the circumferential direction.
- the outer cylinder member undergoes drawing deformation so that the groove width of each concave groove becomes narrow with drawing, so there is a difference in thickness and the thickness of the portion where the concave spherical surface is not formed. Drawing can be performed even if the thickness is large.
- the spring constant in the twisting direction can be reduced, but by forming a concave groove in the outer cylindrical member to enable drawing, the rubber base (rubber-like elastic body) can be pre-compressed. Since it is a structure to be applied, when the outer cylinder member is drawn, deformation concentrates on the concave groove, and the rubber-like elastic body is peeled off at the portion bonded to the concave groove, and the groove width is narrowed. Cracks are generated in the rubber substrate between the concave grooves.
- the first outer cylinder portion and the second outer cylinder portion are held and fixed by the cylindrical member in a state where the first outer cylinder portion and the second outer cylinder portion are drawn. Therefore, there is an effect that preliminary compression in the radial direction can be applied to the first rubber portion and the second rubber portion.
- the first outer cylinder part and the second outer cylinder part are formed from a material having a constant plate thickness into a shape having a concave inner peripheral surface, the first outer cylinder part and the second outer cylinder part can be drawn. It is not necessary to form a concave groove for Therefore, there is an effect that radial compression can be applied to the first rubber portion and the second rubber portion while suppressing occurrence of peeling and cracking of the first rubber portion and the second rubber portion.
- the cylindrical member holds and fixes the first outer cylinder part and the second outer cylinder part
- the shape as an attachment site to the mating member for example, press-fitting into the press-fitting hole of the suspension arm is possible.
- the outer shape can be carried by the cylindrical member, and the first outer cylinder portion and the second outer cylinder portion do not need to take into account the shape as an attachment site to the mating member. Therefore, the first outer cylinder part and the second outer cylinder part can be formed from a material having a constant plate thickness, for example, by pressing, and as a result, the first outer cylinder part and the second outer cylinder part can be formed without providing a concave groove.
- the second outer cylinder portion can be drawn.
- the cylindrical member is subjected to drawing processing, that is, the first outer cylinder portion. Since the first outer cylinder part and the second outer cylinder part are held and fixed by the cylindrical member by tightening the outer peripheral surface side of the second outer cylinder part by the inner peripheral surface side of the cylindrical member, the holding and fixing are performed. There is an effect that it can be performed easily. Further, since the inner diameter of the cylindrical member before the drawing process can be made larger than the outer diameters of the first outer cylinder part and the second outer cylinder part, the first outer cylinder part and the second outer cylinder in the assembly process. There is an effect that the operation of inserting the portion into the inner peripheral side of the tubular member along the axial direction can be efficiently performed.
- a rubber film portion composed of a rubber-like elastic body is provided on at least a part of at least one of the outer peripheral surface of the first outer cylinder portion and the second outer cylinder portion or the inner peripheral surface of the cylindrical member. Since it is covered, the friction coefficient can be secured by the intervention of the rubber film portion. Further, the rubber film portion is interposed, so that the shortage of the tightening allowance due to the spring back of the cylindrical member can be compensated by the compressive force due to the elastic recovery of the rubber film portion. Therefore, there is an effect that it is possible to secure a holding force against the axial withdrawal and to prevent the first outer cylinder portion and the second outer cylinder portion from coming out of the cylindrical member in the axial direction.
- the first outer cylindrical portion and the second outer cylindrical portion are radially arranged (perpendicular to the axis) on the inner peripheral side of the cylindrical member.
- the inner surface of the outer peripheral surface of the first outer cylinder part and the second outer cylinder part and the inner peripheral surface of the cylindrical member Since the rubber film part is covered only on the outer peripheral surfaces of the first outer cylinder part and the second outer cylinder part, and the rubber film part continues to at least one of the first rubber part or the second rubber part, There is no need to cover the rubber film part, and the rubber film part can be vulcanized and formed at the same time as the first rubber part and the second rubber part, so that the manufacturing cost can be reduced accordingly. There is.
- segmentation surface of a 2nd outer cylinder part Are spaced apart in the axial direction, and the outer peripheral surface of the stopper rubber portion and the inner peripheral surface of the cylindrical member are radially separated, and are interposed between the divided surfaces of the first outer cylindrical portion and the second outer cylindrical portion.
- the stopper protruding part is inserted into the cylindrical member via the stopper rubber part. It is possible to exert a stopper function that abuts the inner peripheral surface of the rubber substrate and restricts the deformation of the rubber base accompanying the input displacement to a predetermined amount. Thereby, there is an effect that the durability of the rubber substrate can be improved.
- the portion for exerting the stopper function can be accommodated in the space formed between the divided surface of the first rubber part and the divided surface of the second rubber part. There is an effect that it is possible to reduce the size of the vibration isolator by effectively utilizing the space that becomes the dead space while improving the durability of the rubber base by exerting the stopper function.
- the vibration isolator according to claim 7 in addition to the effect of the vibration isolator according to any one of claims 1 to 5, while reducing the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis,
- the spring constant in the direction can be increased, and the first outer cylinder portion and the second outer cylinder portion can be prevented from being displaced in the direction in which the split surfaces are brought close to the cylindrical member. .
- the outer peripheral surface of the bulging part in the first inner cylinder part and the first outer cylinder part is configured such that the concave inner peripheral surfaces are connected by the first rubber part, and the divided surface of the second inner cylinder part and the divided surface of the second outer cylinder part are arranged at the same axial position.
- the outer peripheral surface of the bulging portion in the portion and the concave inner peripheral surface in the second outer cylinder portion are connected by the second rubber portion, and the first rubber portion is formed between the split surface of the first outer cylinder portion and the first inner cylinder portion.
- the second rubber portion is positioned so as to be retracted in the axial direction from the dividing surface, and the second rubber portion is positioned so as to be retracted in the axial direction from the dividing surface of the second outer cylindrical portion and the dividing surface of the second inner cylindrical portion.
- the first outer cylinder portion and the second outer cylinder in a state in which the division surfaces of the inner cylinder portion and the first outer cylinder portion are brought into contact with the division surfaces of the second inner cylinder portion and the second outer cylinder portion.
- the space between the dividing surface of the first rubber part and the dividing surface of the second rubber part is set, and the dividing surface of the first outer cylinder part and the dividing surface of the second outer cylinder part are brought into contact with each other. Since it can be made to contact, it can control that these 1st outer cylinder parts and the 2nd outer cylinder part move to the direction which makes a mutual division surface approach. That is, since the movement in such a direction can be regulated without relying on the friction with the inner peripheral surface of the cylindrical member, when the large displacement is input in the axial direction, the first outer cylinder portion or the second outer cylinder It can suppress reliably that a part shifts position with respect to a cylindrical member.
- the cylindrical member is subjected to drawing processing, so that one end side of the cylindrical member in the axial direction, the axial direction, etc. Since the end side is formed in a shape reduced in diameter along the outer peripheral surface which is the back side of the concave inner peripheral surface of the first outer cylindrical portion and the second outer cylindrical portion, There is an effect that it is possible not only to move the cylindrical portion and the second outer cylindrical portion in a direction in which the divided surfaces are brought close to each other but also to move in a direction in which the divided surfaces are separated from each other.
- the first outer cylinder part and the second outer cylinder part move in the direction in which the respective divided surfaces are brought close to each other, the movement is restricted by the contact of the divided surfaces and the divided surfaces are separated from each other.
- the movement can be restricted by one axial end side or the other axial end side of the cylindrical member.
- the movement in both directions can be regulated without relying on the friction with the inner peripheral surface of the cylindrical member. Therefore, when a large displacement is input in the axial direction, the first outer cylinder portion or the second outer It is possible to reliably suppress the displacement of the tubular portion with respect to the tubular member.
- FIG. 4A is a top view of the cylindrical member, and FIG.
- FIG. 4B is a cross-sectional view of the cylindrical member taken along line IVb-IVb in FIG.
- A) is a top view of the vulcanized molded body
- (b) is a cross-sectional view of the vulcanized molded body taken along the line Vb-Vb in FIG. 5 (a).
- A) is a sectional view of a vulcanized molded body in a state before being drawn in the outer cylinder drawing step
- (b) is a vulcanization in a state after being drawn in the outer cylinder drawing step. It is sectional drawing of a molded object.
- (A) is sectional drawing of a vulcanization molded object and a cylindrical member in the state where a rubber base was compressed in the direction of an axis in a rubber base compression process
- (b) is a cylindrical member in a cylindrical member squeezing process. It is sectional drawing of a vulcanization molded object and a cylindrical member in the state after drawing processing.
- (A) is sectional drawing of the vulcanization molded object and a cylindrical member in the state before a bending process is given in a bending process
- (b) is in the state after a bending process was given in the bending process. It is sectional drawing of a vulcanization molded object and a cylindrical member.
- (A) is sectional drawing of the vulcanization molded object B which comprises the vibration isolator in 2nd Embodiment
- (b) is sectional drawing of the vibration isolator in 2nd Embodiment.
- (A) is sectional drawing of the vulcanization molded object which comprises the vibration isolator in 3rd Embodiment
- FIG.10 (b) is sectional drawing of the vibration isolator in 3rd Embodiment.
- (A) is a top view of the vibration isolator in 4th Embodiment
- (b) is sectional drawing of the vibration isolator in the XIb-XIb line
- (A) is a top view of a 1st outer cylinder part
- (b) is sectional drawing of the 1st outer cylinder part in the XIIb-XIIb line
- (A) is a side view of the vulcanized molded body, and (b) is a cross-sectional view of the vulcanized molded body taken along line XIIIb-XIIIb in FIG. 13 (a).
- (A) is a sectional view of a vulcanized molded body in a state before being drawn in the outer cylinder drawing step, and (b) is a vulcanization in a state after being drawn in the outer cylinder drawing step. It is sectional drawing of a molded object.
- (A) is sectional drawing of the vulcanization molded object and a cylindrical body in the state before a cylindrical member is drawn in a cylindrical member drawing process
- (b) is a cylindrical member drawing process. It is sectional drawing of the vibration isolator in the state after the drawing process was given to the cylindrical member. It is sectional drawing of the vibration isolator in 5th Embodiment. It is sectional drawing of the vulcanization molded object in 6th Embodiment.
- (A) is a cross-sectional view of the vulcanized molded body that has been subjected to drawing in the outer cylinder drawing step and the cylindrical member in a state before drawing in the cylindrical member drawing step, and (b) These are sectional drawings of the vibration isolator in the state after a cylindrical member was drawn in the cylindrical member drawing process. It is sectional drawing of the vibration isolator in 7th Embodiment.
- FIG. 1A is a top view of the vibration isolator 100 according to the first embodiment of the present invention
- FIG. 1B is a cross-sectional view of the vibration isolator 100 taken along the line Ib-Ib in FIG. FIG.
- a vibration isolator 100 is a vibration isolating bush used for an automobile suspension device (suspension device), and is arranged on a cylindrical inner cylinder member 10 and an outer peripheral side of the inner cylinder member 10.
- the outer cylinder member 20 is provided, the inner cylinder member 10 and the outer cylinder member 20 are connected to each other, and the rubber base 30 formed of a rubber-like elastic body is disposed on the outer peripheral side of the outer cylinder member 20.
- a tubular member 40 having a tubular shape.
- the vibration isolator 100 is configured such that the end surface in the axial O direction of the inner cylinder member 10 is clamped and fixed between a pair of clamping portions in the bracket of the suspension member via an attachment bolt inserted into the inner cylinder member 10.
- the shaped member 40 is press-fitted into a press-fitting hole at one end of the suspension arm (in this embodiment, the lower arm), and is thereby mounted on the suspension device of the automobile.
- FIG. 2A is a top view of the inner cylinder member 10
- FIG. 2B is a cross-sectional view of the inner cylinder member 10 taken along the line IIb-IIb in FIG. 2A.
- the inner cylinder member 10 includes a cylindrical shaft part 11 in which an insertion hole through which a mounting bolt is inserted is formed along the axis O, and a radially outer side from the outer peripheral surface of the shaft part 11. And a spherical bulging portion 12 that bulges toward the direction, and these are integrally formed of a metal material.
- the shaft portion 11 and the bulging portion 12 may be configured separately from different materials (for example, the bulging portion 12 is a resin material).
- the bulging portion 12 is disposed at the center of the shaft portion 11 in the axis O direction (the center in the vertical direction in FIG. 2B), and the center of the convex spherical surface of the bulging portion 12 is on the axis O of the shaft portion 11.
- the inner cylinder member 10 is formed in a rotationally symmetric shape with the axis O as the axis of symmetry (rotation center).
- FIG. 3A is a top view of the first outer cylinder portion 21, and FIG. 3B is a cross-sectional view of the first outer cylinder portion 21 taken along the line IIIb-IIIb of FIG. 3A.
- FIG. 3 shows a state before the drawing process (see FIG. 6) in the outer cylinder drawing process.
- the outer cylinder member 20 is divided into a first outer cylinder part 21 and a second outer cylinder part 22 at the center in the direction of the axis O (see FIG. 1). Since the first outer cylinder portion 21 and the second outer cylinder portion 22 are the same member (configuration) and are different only in names, the first outer cylinder portion 21 will be described below. Description of the 2 outer cylinder part 22 is abbreviate
- the first outer cylinder portion 21 is a member obtained by forming a plate-like metal material (steel material in the present embodiment) with a constant plate thickness into a vessel shape by pressing, It is formed in rotational symmetry with the axis O as the axis of symmetry (rotation center).
- the 1st outer cylinder part 21 is formed from a raw material with a fixed plate
- the first outer cylinder portion 21 (and the second outer cylinder portion 22) is held and fixed to the cylindrical member 40 (see FIG. 1), the shape (this embodiment) as an attachment site to the counterpart member Then, the cylindrical member 40 can be made to bear the outer shape that can be press-fitted into the press-fitting hole of the lower arm, and the first outer cylinder portion 21 does not need to consider the shape as an attachment site to the counterpart member. Therefore, the 1st outer cylinder part 21 can be shape
- the first outer cylinder portion 21 includes an annular portion 20a formed in an annular plate shape orthogonal to the axis O, a curved portion 20b that is connected to the inner edge of the annular portion 20a and whose cross-sectional shape is curved in an arc shape, A conical cylindrical enlarged portion 20c that is connected to the end of the curved portion 20b (lower side in FIG. 3 (b)) and is spaced apart from the curved portion 20b so that the inner diameter is gradually enlarged, and the largest diameter side of the enlarged portion 20c And a cylindrical part 20d having a substantially constant inner diameter, and these parts 20a to 20d are integrally formed coaxially along the axis O.
- the enlarged diameter portion 20c and the cylindrical portion 20d are smoothly connected in an arc shape in cross section. Further, when the annular portion 20a is formed in an annular plate shape orthogonal to the axis O, and the end portion in the axis O direction of the cylindrical member 40 is bent radially inward in a bending step (see FIG. 8) described later. The bent portion overlaps the annular portion 20a in the direction of the axis O (see FIG. 1). Therefore, the engagement between the bent portion of the tubular member 40 and the annular portion 20a can be strengthened.
- the inner peripheral surface of the enlarged diameter portion 20c and the cylindrical portion 20d is a concave inner peripheral surface IS.
- the concave inner peripheral surface IS is a portion surrounding the bulging portion 12 of the inner cylinder member 10, and the diameter-expanded portion 20c and the cylindrical portion 20d are drawn in the outer cylinder drawing step (see FIG. 6).
- the shape of the concave inner peripheral surface IS is formed as a concave spherical surface concentric with the convex spherical surface in the bulging portion 12 of the inner cylinder member 10 (see FIG. 1).
- the outer diameter of the annular portion 20a (the diameter at the outer edge of the annular portion 20a) D1 is the outer diameter of the cylindrical portion 20d (the diameter of the outer peripheral surface of the cylindrical portion 20d) D2. (D1 ⁇ D2).
- FIG. 4A is a top view of the cylindrical member 40
- FIG. 4B is a cross-sectional view of the cylindrical member 40 taken along line IVb-IVb in FIG. 4A. 4 shows a state before the cylindrical member drawing step (see FIG. 7) (that is, the cylindrical member 40 before drawing).
- the cylindrical member 40 is a member formed in a cylindrical shape having an axis O from a metal material (a steel material in the present embodiment). That is, the cylindrical member 40 is formed in a shape that is rotationally symmetric with the axis O as the axis of symmetry (rotation axis).
- the inner diameter of the cylindrical member 40 is the maximum outer diameter of the vulcanized molded body A after the drawing process (see FIG. 6B) in the outer cylinder drawing process described later (the outer peripheral surfaces of the rubber film portions 33 and 34). Larger than the diameter). In the present embodiment, it is made larger than the maximum outer diameter (outer diameter D2 of the cylindrical portion 20d) of the vulcanized molded body A before drawing. Thereby, in the assembly work of the vibration isolator 100, the work of inserting the vulcanized molded body A into the inner peripheral side of the tubular member 40 along the axis O direction can be efficiently performed (FIG. 7A). reference).
- chamfering is performed on the corner on the inner peripheral surface side to form a chamfered surface 40a having a linear cross section.
- the formation of the chamfered surface 40a can also improve the workability of inserting the vulcanized molded body A along the axis O direction into the inner peripheral side of the cylindrical member 40.
- the chamfered surface 40a it is possible to easily bend the end portion in the axial O direction of the tubular member 40 radially inward in a bending step (see FIG. 8) described later.
- FIG. 5A is a top view of the vulcanized molded body A
- FIG. 5B is a cross-sectional view of the vulcanized molded body A along the line Vb-Vb in FIG. 5A.
- the vulcanized molded body A is a part molded by a vulcanization mold and constitutes one element of the vibration isolator 100. That is, the vibration isolator 100 is configured by mounting the tubular member 40 on the vulcanized molded body A.
- the vulcanized molded body A is manufactured by placing the inner cylinder member 10 and the outer cylinder member 20 (the first outer cylinder portion 21 and the second outer cylinder portion 22) in a vulcanization mold, and after clamping the mold, a rubber material And the rubber substrate 30 is vulcanized and molded. Thereby, the outer peripheral surface of the inner cylindrical member 10 and the inner peripheral surface of the outer cylindrical member 20 (the first outer cylindrical portion 21 and the second outer cylindrical portion 22) are connected by the rubber base 30, and the vulcanized molded body A Is manufactured.
- the 1st outer cylinder part 21 and the 2nd outer cylinder part 22 are coaxially installed in a vulcanization metal mold
- the vulcanization mold includes an intermediate mold located in the center of the inner cylinder member 10 in the direction of the axis O (the vertical direction in FIG. 5 (b)).
- the intermediate mold has an annular shape after clamping, The inner peripheral front end edge of the middle mold is in close contact with the outer peripheral surface of the bulging portion 12 and the top of the spherical surface.
- the middle type is interposed between the split surfaces of the first outer cylinder portion 21 and the second outer cylinder portion 22, so that the first outer cylinder portion 21 and the second outer cylinder portion 22 have their split surfaces
- the end portion of the cylindrical portion 20d in the axis O direction and the lower side surface of FIG. 3 (b) are placed in the vulcanization mold in a state of being separated in the direction of the axis O, and the rubber base 30 includes the first rubber portion 31 and the second rubber. It is vulcanized and molded into a portion 32 divided into two in the direction of the axis O.
- the rubber base 30 (the first rubber portion 31 and the second rubber portion 32) of the vulcanized molded body A has a split surface of the first outer cylinder portion 21 and a split surface of the second outer cylinder portion 21 in the axis O direction. And a state in which a predetermined interval is provided.
- the first rubber portion 31 is a portion that connects the outer peripheral surface of the bulging portion 12 of the inner cylinder member 10 and the concave inner peripheral surface IS of the first outer cylinder portion 21, and the second rubber portion 32 is the inner cylinder member 10. This is a portion for connecting the outer peripheral surface of the bulging portion 12 and the concave inner peripheral surface IS in the second outer cylindrical portion 22.
- the first rubber part 31 and the second rubber part 32 are disposed with a predetermined interval between the divided surfaces. The interval between the divided surfaces is formed so as to become narrower from the first outer cylinder portion 21 and the second outer cylinder portion 22 toward the bulging portion 12 of the inner cylinder member 10.
- the first rubber part 31 and the second rubber part 32 do not need to be completely divided (divided) in the direction of the axis O. For example, even if the first rubber part 31 and the second rubber part 32 are connected by a part (for example, a film-like body) of the rubber base 30 that covers the outer peripheral surface of the bulging part 12 of the inner cylinder member 10. good.
- the rubber base 30 includes rubber film portions 33 and 34 that are covered on the outer peripheral surfaces of the first outer cylinder portion 21 and the second outer cylinder portion 22.
- the rubber film portions 33 and 34 are portions that form a circular outer peripheral surface with the axis O as the center, and are formed in a range from the annular portion 20a to the middle of the conical portion 20c, and the annular portion 20a.
- the outer diameter of the rubber film portions 33, 34 is the outer diameter of the cylindrical portion 20d (cylindrical portion 20d). Is smaller than D2 (D3 ⁇ D2).
- the covering range of the rubber film portions 33 and 34 is a range up to the middle of the conical portion 20c, and the rubber film portion 33 and the remaining portion of the conical portion 20c on the cylindrical portion 20d side are disposed on the cylindrical portion 20d. 34 is not covered (that is, the outer peripheral surface is exposed).
- the cylindrical portion 20d and the conical portion 20c can be directly pressed by the drawing die (not shown) without using the rubber film portions 33 and 34.
- the drawing process can be performed with high accuracy.
- the rubber film portions 33 and 34 are provided with receiving recesses 33a and 34a that are recessed from the outer peripheral surface thereof toward the conical portion 20c and are located on the cylindrical portion 20d side.
- the contact area between the vulcanization mold and the conical portion 20c can be secured and the sealing performance at the time of vulcanization molding can be improved, so that the rubber film portions 33 and 34 are formed on the outer peripheral surface of the cylindrical portion 20d.
- a space is formed between the inner peripheral surface of the cylindrical member 40 and the outer peripheral surface of the conical portion 20c in the cylindrical member drawing step (see FIG. 7). In the space, the rubber film portions 33 and 34 that have become surplus can be received.
- the vibration isolator 100 is assembled by an outer cylinder drawing step (see FIG. 6) for drawing the outer cylinder member 20 (first outer cylinder portion 21 and second outer cylinder portion 22), and a rubber base 30 (first rubber portion). 31 and the second rubber portion 32) in the direction of the axis O, a rubber base compression step (see FIG. 7), a cylindrical member drawing step for drawing the cylindrical member 40 (see FIG. 7), and a cylindrical member This is performed by sequentially performing a bending step (see FIG. 8) for bending the end portions of the 40 axis O directions.
- FIG. 6A is a cross-sectional view of the vulcanized molded body A in a state before the drawing process is performed in the outer cylinder drawing process
- FIG. 6B is a diagram after the drawing process is performed in the outer cylinder drawing process. It is sectional drawing of the vulcanization molding A in the state.
- the drawing die for drawing the outer cylinder member 20 (the first outer cylinder portion 21 and the second outer cylinder portion 22) is an annular die and an annular shape that holds and guides the annular die from the outer peripheral side. (All are not shown).
- the die is divided into a plurality of die pieces in the circumferential direction, and a tapered surface is formed on the outer peripheral surface.
- the holder has a tapered surface corresponding to the tapered surface of the die formed on the inner periphery.
- the die is held by a holder installed on the table of the press device, the vulcanized molded body A is set on the inner peripheral side of the die, and then the die is pressed against the holder by the pressing force of the press device.
- each die piece is guided radially by the taper surface of the inner peripheral surface of the holder to the axial center O of the vulcanized molded body A toward the axis O. Are moved closer to each other and the diameter of the die is reduced.
- the cylindrical portion 20d of the first outer cylinder portion 21 and the second outer cylinder portion 22 is reduced in diameter from the outer diameter D2 to the outer diameter D4 (D4 ⁇ D2). Thereby, preliminary compression in the radial direction (direction perpendicular to the axis O) can be applied to the rubber base 30 (the first rubber portion 31 and the second rubber portion 32).
- the conical portion 20c and the cylindrical portion 20d are drawn and deformed so as to be bent radially inward with the curved portion 20b as a fulcrum. Is curved.
- the shape of the concave inner peripheral surface IS can be brought close to a concave spherical surface that is concentric with the convex spherical surface of the bulging portion 12 of the inner cylinder member 10.
- the outer diameter D2 is 53.6 mm and the outer diameter D4 is 52.0 mm. Further, the outer diameter D4 is made smaller than the outer diameter D3 (see FIG. 5) of the rubber film portions 33 and 34 (D4 ⁇ D3). That is, in the vulcanized molded body A shown in FIG. 6B after the outer cylinder drawing process is performed, the rubber film portions 33 and 34 have a larger diameter than the cylindrical portion 20d, and the rubber film portions 33 and 34 are formed.
- the outer peripheral surface is disposed radially outward (a position spaced apart from the axis O) from the outer peripheral surface of the cylindrical portion 20d.
- FIG. 7A is a cross-sectional view of the vulcanized molded body A and the cylindrical member 40 in a state where the rubber base 30 is compressed in the axis O direction in the rubber base compression step
- FIG. It is sectional drawing of the vulcanization molded object A and the cylindrical member 40 in the state after the drawing process was given to the cylindrical member 40 in the member drawing process.
- the vulcanized molded body A is inserted into the cylindrical member 40 along the direction of the axis O, and the vulcanized molded body A is inserted into the cylindrical member 40. Install on the circumference side. Subsequently, the first outer cylinder portion 21 and the second outer cylinder portion 22 of the vulcanized molded body A are divided into the split surfaces of both the outer cylinder portions 21 and 22 (the end surface in the axis O direction of the cylindrical portion 20d, FIG. 3B lower). Side surface) Relatively move in the direction of axis O so that they are close to each other.
- the annular part 20a of the first outer cylinder part 21 and the annular part 20a of the second outer cylinder part 22 are sandwiched between the end surfaces of the pair of cylindrical jigs J, and the upper jig J is placed on the lower side. Push down toward the jig J by a predetermined amount in the direction of the axis O. In the present embodiment, as shown in FIG. 7A, a predetermined gap is formed between the divided surface of the first outer cylinder part 21 and the divided surface of the second outer cylinder part 22. The pair of jigs J is fixed.
- the drawing of the tubular member 40 by the tubular member drawing step is performed with the pair of jigs J fixed (that is, the rubber base 30 (the first rubber portion 31 and the second rubber member 30).
- the rubber part 32) is carried out while maintaining the state compressed in the direction of the axis O).
- the configuration of the drawing die for drawing the cylindrical member 40 and the operation thereof are the same as those of the drawing die used in the outer cylinder drawing step, and the description thereof will be omitted.
- the drawing of the cylindrical member 40 is performed by pressing the cylindrical portion 20d of the first outer cylindrical portion 21 and the second outer cylindrical portion 22 inward in the radial direction by the inner peripheral surface of the cylindrical member 40.
- a predetermined fastening allowance (in the present embodiment, about 0.01 mm to 0.02 mm in radius) is given to the portion 20d, so that the first outer cylinder portion 21 and the second outer cylinder portion 22 are placed in the cylindrical member 40.
- the purpose is to hold on.
- the tightening margin is set to a small value, and drawing can be performed by the operation of the drawing die with a relatively low pressure, so that the press device can be downsized.
- the inner peripheral surface of the tubular member 40 and the rubber film portions 33 and 34 are brought into close contact with each other by the elastic recovery force of the compressed rubber film portions 33 and 34.
- FIG. 8A is a cross-sectional view of the vulcanized molded body A and the cylindrical member 40 in a state before the bending process is performed in the bending process
- FIG. 8B is a diagram illustrating the bending process performed in the bending process. It is sectional drawing of the vulcanization molded object A and the cylindrical member 40 in the state after being done.
- the caulking die for bending the end of the cylindrical member 40 in the axis O direction includes a pair of annular dies and a holder that holds the pair of dies so as to be movable in the axis O direction.
- a curved concave portion which is a concave portion in which a cross-sectional shape cut along a plane including the axis O curves in a circular arc shape, is recessed at a portion where the end portion in the axial O direction of the cylindrical member 40 abuts.
- the cylindrical member 40 has been subjected to the drawing process in the cylindrical member drawing step described above (see FIG. 7), so that the pair of jigs J are removed as shown in FIG. Even in this state, the first outer cylinder part 21 and the second outer cylinder part 22 can be held on the inner peripheral side.
- the first outer cylinder portion 21 and the second outer cylinder portion 22 and the inner peripheral surface of the cylindrical member 40 are in direct contact (that is, the metal materials are in contact with each other), It is difficult to ensure the coefficient of friction. Further, since the spring back after the drawing process is enlarged by the cylindrical member 40 located on the outer peripheral side, it is difficult to secure the tightening allowance. Therefore, the first outer cylinder portion 21 and the second outer cylinder portion 22 may come out from the cylindrical member 40 in the axis O direction.
- rubber film portions 33 and 34 made of a rubber-like elastic body are covered on part of the outer peripheral surfaces of the first outer cylinder portion 21 and the second outer cylinder portion 22.
- the friction coefficient can be secured by the intervention of the rubber film portion.
- the rubber film portions 33 and 34 are interposed, so that the shortage of the tightening allowance due to the spring back of the tubular member 40 can be compensated by the compression force due to the elastic recovery of the rubber film portions 33 and 34. Therefore, it is possible to secure a holding force against the withdrawal in the axis O direction, and to prevent the first outer cylinder portion 21 and the second outer cylinder portion 22 from coming out of the cylindrical member 40 in the axis O direction.
- the caulking die used in the bending process does not need to consider the relationship with the jig J (that is, the bending process can be performed with the jig J removed). It can be simplified.
- first outer cylinder portion 21 and the second outer cylinder portion 22 are slightly shifted in the direction of the axis O (moved in the direction of withdrawal) by removing the pair of jigs J,
- the bent portions are used to push back the first outer cylindrical portion 21 and the second outer cylindrical portion 22 to define the position in the axial O direction. (Can be placed at an appropriate position).
- the cylindrical member 40 is subjected to drawing processing, and the inner peripheral surface thereof is in close contact with the first outer cylinder portion 21 and the second outer cylinder portion 22 and the rubber film portions 33 and 34, thereby preventing vibration.
- the vulcanized molded body A can be prevented from rattling in the radial direction (perpendicular to the axis O) on the inner peripheral side of the tubular member 40.
- the rubber base 30 (the first rubber portion 31 and the second rubber portion 32) includes the outer peripheral surface of the bulging portion 12 of the inner cylinder member 10 and the outer cylinder member 20 ( Since the connection is made between the concave inner peripheral surface IS of the first outer cylinder portion 21 and the second outer cylinder portion 22) (that is, the concentric concave spherical surface surrounding the bulging portion 12 of the inner cylinder member 10).
- the rubber base 30 In response to the input of the directional displacement, the rubber base 30 can be deformed mainly in the shearing direction. Therefore, the spring constant in the twisting direction of the vibration isolator 100 can be reduced.
- the division surface of the first outer cylinder portion 21 and the division surface of the second outer cylinder portion 22 are separated in the axis O direction by a vulcanization process (with a predetermined interval).
- the first rubber portion 31 and the second rubber portion 32 are vulcanized (see FIG. 6A).
- the vulcanized molded body A vulcanized and molded in such a form has a rubber base compression step (see FIGS. 6B and 7A) and a cylindrical member squeezing step (FIGS. 7A and 7). (B)) and the bending process (see FIGS.
- the first outer cylinder portion 21 and the second outer cylinder portion 22 are relatively moved in the axis O direction and divided. It is held and fixed by the cylindrical member 40 in a state where the surfaces are close to each other. Thereby, preliminary compression in the direction of the axis O can be applied to the first rubber part 31 and the second rubber part 32.
- the first outer cylinder part 21 and the second outer cylinder part 22 that are relatively moved in the direction of the axis O can be provided only by adopting a structure in which the cylindrical member 40 holds and fixes the first outer cylinder part 21 and the second outer cylinder part 22.
- the spring constant in the direction of the axis O can be increased, and the durability against the displacement in the direction of the axis O can be improved.
- the vulcanized molded body A has the divided surface of the first outer cylinder part 21 and the divided surface of the second outer cylinder part 22 separated in the axis O direction.
- Vulcanization molding is performed in a state (with a predetermined interval) (see FIG. 6A), and after the vulcanization molding, the first outer cylinder portion 21 and the second outer cylinder portion 22 are relatively moved in the direction of the axis O. (Refer to FIG. 6B and FIG. 7A) Since it is configured to be held and fixed by the cylindrical member 40 (see FIG. 8B), it is between the first outer cylinder portion 21 and the second outer cylinder portion 22.
- the relative distance in the axis O direction (that is, the separation distance in the axis O direction between the split surfaces when held and fixed to the cylindrical member 40 (the vertical distance in FIG. 8B)) can be adjusted. Thereby, since the amount of preliminary compression in the direction of the axis O applied to the first rubber part 31 and the second rubber part 32 can be adjusted, the value of the spring constant in the direction of the axis O can be increased or decreased.
- FIG. 9A is a cross-sectional view of the vulcanized molded body B constituting the vibration isolator 200 in the second embodiment
- FIG. 9B is a cross section of the vibration isolator 200 in the second embodiment.
- FIG. 9A shows the vulcanized molded body B in a state before the outer cylinder member 20 is drawn by the outer cylinder drawing step.
- the vulcanized molded body B in the second embodiment has other configurations except that the configuration (formation range) of the rubber film portions 233 and 234 is different from the configuration of the rubber film portions 33 and 34 in the first embodiment. Is the same as the vulcanized molded product A in the first embodiment.
- the method for manufacturing the vibration isolator 200 is the same as that for the vibration isolator 100. Therefore, these descriptions are omitted.
- the rubber film portions 233 and 234 in the second embodiment are covered over the entire outer peripheral surfaces of the first outer cylinder portion 21 and the second outer cylinder portion 22. That is, the covering range of the rubber film portions 33 and 34 in the first embodiment is a range extending from the annular portion 20a to the middle of the conical portion 20c (see FIG. 5B). The range is extended, and the rubber film portions 233 and 234 are also covered on the outer peripheral surface of the conical portion 20c and the outer peripheral surface of the cylindrical portion 20d.
- the rubber film parts 233 and 234 form a circular outer peripheral surface with the axis O as the center, as in the case of the first embodiment.
- the outer diameters of these rubber film parts 233 and 234 are made smaller than the inner diameter of the tubular member 40.
- the contact area with the inner peripheral surface of the tubular member 40 can be increased by expanding the covering range of the rubber film portions 233 and 234. Accordingly, the holding force of the vulcanized molded body B by the cylindrical member 40 can be secured, and therefore, after the cylindrical member 40 is drawn by the cylindrical member drawing process, the process proceeds to the bending process (see FIG. 8), it is possible to more reliably suppress the vulcanized molded body B from coming out in the direction of the axis O from the inner peripheral side of the tubular member 40.
- FIG. 10A is a cross-sectional view of the vulcanized molded body C constituting the vibration isolator 300 in the third embodiment
- FIG. 10B is a cross section of the vibration isolator 300 in the third embodiment.
- the configuration of the first outer cylinder part 321 and the second outer cylinder part 322 is the same as that of the first outer cylinder part 21 and the second outer cylinder part 22 in the first embodiment. Except for the differences from the configuration, the other configurations are the same as those of the vulcanized molded body A in the first embodiment. However, the rubber film portions 233 and 234 are the same as the vulcanized molded body B in the second embodiment.
- the manufacturing method of the vibration isolator 300 is the same as that of the vibration isolator 100 except that the outer cylinder drawing step (see FIG. 6, drawing of the outer cylinder member 320) is omitted. . Therefore, these descriptions are omitted.
- the outer cylinder member 320 in the third embodiment is a solid member (a member made of aluminum die casting in the present embodiment) formed by casting, and on the inner peripheral side.
- a concave inner peripheral surface IS formed as a concave spherical surface is provided, and is divided into a first outer cylindrical portion 321 and a second outer cylindrical portion 322 at the central portion in the axis O direction of the concave inner peripheral surface IS.
- the first outer cylinder part 321 and the second outer cylinder part 322 are the same member (configuration).
- the divided surface of the first outer cylinder portion 321 and the divided surface of the second outer cylinder portion 322 are spaced apart in the axis O direction as in the case of the vulcanized molded body A in the first embodiment. Then, it is vulcanized and formed at a predetermined interval.
- the concave inner circumferential surface IS is formed so that the first outer cylinder part 321 and the second outer cylinder part 322 are close to each other in the divided surfaces of the outer cylinder parts 321 and 322 in the rubber base compression process (see FIG. 7). Further, by being relatively moved in the direction of the axis O, a convex spherical surface is formed concentrically with the convex spherical surface in the bulging portion 12 of the inner cylinder member 10.
- the rubber base 30 (the first rubber part 31 and the second rubber part 32) can be mainly deformed in the shearing direction in response to the input of the displacement in the twisting direction.
- the spring constant at can be reduced.
- first outer cylinder part 321 and the second outer cylinder part 322 are relatively moved in the direction of the axis O and the divided surfaces are brought close to each other, the first outer cylinder part 321 and the second outer cylinder part 322 are held and fixed by the cylindrical member 40. Preliminary compression in the direction of the axis O can be applied to the part 31 and the second rubber part 32.
- the outer cylinder member 320 (the first outer cylinder portion 321 and the second outer cylinder portion 322) has a shape that cannot be subjected to drawing processing (diameter reduction processing)
- the first rubber portion 31 and the second rubber portion 31 are provided.
- the spring constant in the axis O direction can be increased, and durability against displacement in the axis O direction can be improved.
- FIG. 11A is a top view of the vibration isolator 400 according to the fourth embodiment
- FIG. 11B is a cross-sectional view of the vibration isolator 400 taken along the line XIb-XIb in FIG. .
- symbol is attached
- the inner cylinder member 410 is a member formed in a rotationally symmetric shape having an axis O as a symmetric axis (rotation center), and a cylindrical shape in which an insertion hole is formed through the axis O.
- a shaft portion 411 and a spherical bulging portion 412 that bulges radially outward from the outer peripheral surface of the shaft portion 411 are formed integrally from a metal material.
- the bulging portion 412 is disposed in the center of the shaft portion 411 in the axis O direction (the center in the vertical direction in FIG. 11B), and the center of the convex spherical surface of the bulging portion 412 is on the axis O of the shaft portion 411. To position.
- the outer cylinder member 420 is divided into a first outer cylinder part 421 and a second outer cylinder part 422 at the center in the axis O direction.
- the detailed structure of the outer cylinder member 420 is demonstrated.
- the 1st outer cylinder part 421 and the 2nd outer cylinder part 422 are the same members (structure), and are only members from which a name differs, the 1st outer cylinder part 421 is demonstrated below, The description of the second outer cylinder portion 422 is omitted.
- FIG. 12A is a top view of the first outer cylinder portion 421, and FIG. 12B is a cross-sectional view of the first outer cylinder portion 421 taken along the line XIIb-XIIb in FIG.
- FIG. 12 shows a state before the drawing process (see FIG. 14) in the outer cylinder drawing process.
- the first outer cylinder portion 421 is a member obtained by forming a plate-like metal material (steel material in the present embodiment) having a constant plate thickness into a container shape by pressing, It is formed in rotational symmetry with the axis O as the axis of symmetry (rotation center).
- groove for enabling a drawing process like the conventional product with respect to the 1st outer cylinder part 421, and the effect are the 1st outer cylinder parts 21 in 1st Embodiment. Since this is the same, the description thereof is omitted.
- the first outer cylinder portion 421 is located on one end side in the axis O direction (upper side in FIG. 12B), and has a cylindrical portion having a substantially constant diameter (inner diameter and outer diameter), and the cylindrical portion. And the diameter is gradually enlarged toward the dividing surface (lower end surface in FIG. 12 (b)) and the cross-sectional shape is curved in an arc shape.
- the first outer cylinder portion 421 has an inner diameter dimension of the cylindrical portion (that is, an opening at the end of the first outer cylinder portion 421 in the direction of the axis O in the state before being drawn by an outer cylinder drawing step described later).
- the minimum inner diameter dimension in FIG. 12B (upper side) is made smaller than the maximum outer diameter dimension in the bulging portion 412 of the inner cylinder member 410 (see FIG. 13B).
- a plurality of (four in the present embodiment) through-holes 421a are formed at equal intervals in the circumferential direction at a portion where the cross-sectional shape is curved in an arc shape.
- the inner peripheral surface of the portion curved in an arc shape is a concave inner peripheral surface IS surrounding the bulging portion 412 of the inner cylinder member 410.
- the concave inner circumferential surface IS is a concentric concave spherical surface that is concentric with the convex spherical surface in the bulging portion 412 of the inner cylindrical member 410 by drawing (drawing deformation) in the outer cylinder drawing step (see FIG. 14). To be close to.
- the cylindrical member 440 has the same configuration as that of the cylindrical member 40 in the first embodiment except that the formation of the chamfered surface 40a is omitted (see FIGS. 4 and 15A). Is omitted.
- FIG. 11 the cylindrical member 440 after drawing by the cylindrical member drawing process (refer FIG. 15) is illustrated.
- FIG. 13A is a side view of the vulcanized molded body D
- FIG. 13B is a cross-sectional view of the vulcanized molded body D along the line XIIIb-XIIIb of FIG. 13A.
- the vulcanized molded body D includes an inner cylinder member 410 and an outer cylinder member 420 (first outer cylinder part 421 and second outer cylinder part 422), as in the case of the first embodiment.
- the rubber base 430 (the first rubber portion 431 and the second rubber portion 432) is vulcanized to form the outer peripheral surface of the inner cylinder member 410 and the outer cylinder member 420 (first outer cylinder).
- the part 421 and the inner peripheral surface of the second outer cylinder part 422) are connected by a rubber base 430 to be manufactured.
- the vulcanization mold is provided with an intermediate mold that is located in the center of the inner cylinder member 410 in the axis O direction (the vertical direction in FIG. 13 (b)) and has an annular shape after the mold clamping.
- the inner peripheral front end edge of the middle mold faces the outer circumferential surface (top) of the bulging portion 412 with a predetermined interval, and the upper and lower surfaces of the middle mold are the first outer cylinder portion 421 and the second outer cylinder portion 422. Support the split surface.
- type of this division surface is intermittently arrange
- the first outer cylinder part 421 and the second outer cylinder part 422 are installed in the vulcanization mold with their divided surfaces spaced apart in the direction of the axis O, and the rubber base 430 is the first rubber.
- the part 431 and the second rubber part 432 are vulcanized and molded into two parts in the direction of the axis O. That is, the vulcanized molded body D has a space between the dividing surface of the first rubber portion 431 and the dividing surface of the second rubber portion 432 (and the dividing surface of the first outer cylinder portion 421 and the division of the second outer cylinder portion 422).
- a space SP having a shape corresponding to the middle size in the present embodiment, a U-shaped cross section
- the first rubber portion 431 is a portion that connects the outer peripheral surface of the bulging portion 412 of the inner cylinder member 410 and the concave inner peripheral surface IS of the first outer cylinder portion 421, and the second rubber portion 432 is the inner cylinder member 410.
- the outer peripheral surface of the bulging portion 412 and the concave inner peripheral surface IS in the second outer cylinder portion 422 are connected to each other.
- the rubber base 430 includes rubber film parts 431a and 431b that are provided on the outer peripheral surface of the first outer cylinder part 421.
- the rubber film portions 431a and 431b are two belt-like films that are continuous in the circumferential direction.
- the rubber film portion 431a is passed through the through hole 421a of the first outer cylinder portion 421, and the rubber film portion 431b is the first outer cylinder.
- the first rubber portions 431 are connected to each other through the dividing surface of the portion 421.
- the rubber film portion 431b employs a configuration that continues to the first rubber portion 431 via the dividing surface of the first outer cylinder portion 421, in addition to the through hole 421a, a rubber film is further provided. There is no need to form a through hole in the first outer cylinder part 421 for connecting the part 431b to the first rubber part 431. Therefore, since formation of a through-hole can be suppressed to the minimum, the rigidity of the 1st outer cylinder part 421 can be ensured by that much, and the durable improvement can be aimed at.
- the covering range of the rubber film portions 431a and 431b is partial, and there is a rubber film portion in the region above the rubber film portion 431a (upper side in FIG. 13B) and between the rubber film portions 431a and 431b. 431a and 431b are not covered (that is, the outer peripheral surface of the first outer cylinder portion 421 is exposed).
- the outer peripheral surface of the first outer cylinder part 421 can be directly pressed by a drawing die (not shown) without using the rubber film parts 431a and 431b. Drawing can be performed with high accuracy.
- the rubber base 430 includes rubber film portions 432a and 432b that are covered on the outer peripheral surface of the second outer cylinder portion 422.
- the rubber film portions 432a and 432b are configured in the same manner as the rubber film portions 431a and 431b, respectively, and thus description thereof is omitted.
- FIG. 14A is a cross-sectional view of the vulcanized molded body D in a state before the drawing process is performed in the outer cylinder drawing process
- FIG. 14B is a diagram after the drawing process is performed in the outer cylinder drawing process. It is sectional drawing of the vulcanization molding D in the state.
- the first outer cylinder part 421 and the second outer cylinder part 422 are reduced in diameter from the outer diameter D401 to the outer diameter D402 (D402 ⁇ D401).
- preliminary compression in the radial direction perpendicular to the axis O
- the configuration and operation of the drawing die are the same as in the case of the first embodiment, and a description thereof will be omitted.
- FIG. 15A is a cross-sectional view of the vulcanized molded body D and the cylindrical body 440 in a state before the cylindrical member 440 is drawn in the cylindrical member drawing process
- FIG. FIG. 5 is a cross-sectional view of the vibration isolator 400 in a state after the cylindrical member 440 has been subjected to drawing processing in the cylindrical member drawing step.
- the vulcanized molded body D is inserted into the tubular member 440 along the axis O direction, and the vulcanized molded body D is inserted.
- the cylindrical member 440 is drawn in the cylindrical member drawing step (FIG. 15B).
- the cylindrical member drawing process two-stage drawing is performed on the cylindrical member 440. That is, the entire cylindrical member 440 is reduced from the outer diameter D403 to the outer diameter D404 by the first stage drawing (D404 ⁇ D403).
- the cylindrical member 440 has the first outer cylinder portion 421 and the second outer cylinder at the one end side in the axis O direction and the other end side in the axis O direction excluding the central portion in the axis O direction.
- the diameter of the portion 422 is reduced to a shape close to the outer peripheral surface of the concave inner peripheral surface IS of the concave inner peripheral surface IS (that is, a portion where the cross-sectional shape is curved in an arc shape) (inward in the radial direction in a cross-sectional view). Bend).
- the tubular member 440 is mounted on the vulcanized molded body D, and the assembly thereof (manufacture of the vibration isolator 400) is completed.
- first stage drawing and the second stage drawing may be performed by different drawing dies, or may be performed by the same drawing dies.
- the first stage drawing and the second stage drawing may proceed simultaneously.
- the first outer cylindrical portion 421 and the second outer cylindrical portion 422 are pressed radially inward by the inner peripheral surface of the cylindrical member 440, and the first outer cylindrical portion 421 and the second outer cylindrical portion 422 are pressed.
- a predetermined fastening allowance (in the present embodiment, a radius of about 0.01 mm to 0.02 mm) is given to the cylindrical portion 422.
- the 1st outer cylinder part 421 and the 2nd outer cylinder part 422 can be firmly hold
- the inner peripheral surface of the tubular member 440 and the rubber film portions 431a to 432b are brought into close contact with each other by the elastic recovery force of the compressed rubber film portions 431a to 432b.
- the inner diameter of the cylindrical member 440 is the outer cylinder member 420 (first outer cylinder) after the drawing process (see FIG. 14B) by the outer cylinder drawing process.
- Part 421 and second outer cylinder part 422) are made larger than the outer diameter D402.
- the inner diameter of the tubular member 440 is made larger than the maximum outer diameter of the vulcanized molded body D (the outer diameter on the outer peripheral surface of the rubber film portions 431b and 432b).
- the inner diameter of the cylindrical member 440 is larger than the outer diameter D402 of the outer cylindrical member 420 and smaller than the maximum outer diameter of the vulcanized molded body D (the diameter on the outer peripheral surface of the rubber film portions 431b and 432b).
- the rubber film portions 431b and 432b may be press-fitted while being elastically deformed. The processing amount of the drawing process applied to the cylindrical member 440 can be suppressed, and the yield can be improved and the processing cost can be reduced.
- the friction coefficient is ensured as in the case of the first embodiment, and the shortage of the fastening allowance due to the spring back of the cylindrical member 440 can be compensated by the compressive force due to the elastic recovery of the rubber film portions 431a to 432b. Therefore, even if the dividing surface of the first outer cylinder portion 421 and the dividing surface of the second outer cylinder portion 422 are separated from each other, a holding force against movement in the axis O direction can be ensured.
- the rubber base compression step is omitted, and the divided surface of the first rubber part 431 and the divided surface of the second rubber part 432 are separated from each other in the axis O direction.
- the first outer cylinder portion 421 and the second outer cylinder in a state in which the space SP is formed between them (that is, the first rubber portion 431 and the second rubber portion 432 are not preliminarily compressed in the direction of the axis O).
- the portion 422 is held and fixed by the cylindrical member 440.
- the first rubber portion 431 and the first rubber portion 431 in the twisting direction corresponding to the space SP.
- the compression component of the first rubber part 431 and the second rubber part 432 in the axis O direction while suppressing the shear component of the two rubber parts 432 and the compression component of the first rubber part 431 and the second rubber part 432 in the direction perpendicular to the axis O Can be secured.
- the spring constant in the axis O direction can be increased while the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis O are reduced.
- the maximum outer diameter dimension (outer diameter at the central portion in the axis O direction) of the bulging portion 412 of the inner cylinder member 410 is the first outer cylinder portion 421 and the second outer cylinder portion 422. Is larger than the minimum inner diameter dimension (inner diameter dimension of the cylindrical portion) at the end opening in the axis O direction, so that the pressure receiving area is increased with respect to the displacement in the axis O direction, and the first rubber section 431 and The compression component of the second rubber part 432 can be ensured.
- the effect of increasing the spring constant in the axis O direction can be made remarkable while reducing the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis O.
- the relationship between the maximum outer diameter of the bulging portion 412 and the minimum inner diameter of the outer cylindrical member 420 is between the bulging portion 412 of the inner cylindrical member 410 and the concave inner peripheral surface IS of the outer cylindrical member 420.
- the rubber base in which the rubber base is continuously disposed (that is, having no space SP)
- the rubber base shear component in the twisting direction and the direction perpendicular to the base O are simultaneously with the compressive component of the rubber base in the axial O direction. Since the compression component of the rubber base is also increased, it is impossible to employ the compression component, and the space SP is formed between the divided surface of the first rubber portion 431 and the divided surface of the second rubber portion 432 as in the vibration isolator 400. Can be adopted for the first time.
- the present embodiment omits the rubber base compression step (see FIG. 7) compared to the first embodiment, and pre-compresses the first rubber portion 431 and the second rubber portion 432 in the axis O direction.
- the cylindrical member squeezing step see FIG. 15
- the first rubber portion 431 and the cylindrical member 440 are deformed on one end side in the axis O direction and the other end side in the axis O direction.
- the second rubber portion 432 is allowed to be compressed and deformed in the axis O direction. That is, it is sufficient that a space SP is secured between the dividing surface of the first rubber part 431 and the dividing surface of the second rubber part 432.
- FIG. 16 is a cross-sectional view of a vibration isolator 500 according to the fifth embodiment.
- the vibration isolator 500 according to the fifth embodiment is the same as that according to the fourth embodiment except that the configuration of the inner cylinder member 510 is different from that of the inner cylinder member 410 according to the fourth embodiment. Identical to device 400. Therefore, description of these same parts is omitted.
- the inner cylinder member 510 of the vibration isolator 500 includes a cylindrical shaft portion 411 and a spherical expansion that bulges outward from the shaft portion 411 in the radial direction.
- the bulging part 512 is made of a resin material. That is, the shaft portion 411 and the bulging portion 512 are configured separately from different materials. Also in the vibration isolator 500 that employs the inner cylinder member 510 configured as described above, the same operational effects as those of the vibration isolator 400 in the fourth embodiment can be achieved.
- a vibration isolator 600 according to the sixth embodiment will be described with reference to FIGS. 17 and 18.
- the first embodiment only the outer cylinder member 20 is divided into two at the center portion in the axis O direction.
- the inner cylinder member 610 is also the center in the axis O direction. Divided into two parts.
- symbol is attached
- the first inner cylinder part 610 a, the first outer cylinder part 621, and the first rubber part 631 are the same members (configuration) as the second inner cylinder part 610 b, the second outer cylinder part 622, and the second rubber part 632. Yes, since only the names are different members, only the former will be described below, and description of the latter will be omitted.
- FIG. 17 is a cross-sectional view of a vulcanized molded body E according to the sixth embodiment.
- the inner cylinder member 610 in the sixth embodiment is the first inner cylinder part at the center in the axis O direction of the inner cylinder member 410 (see FIG. 13B) in the fourth embodiment.
- 610a and the second inner cylinder portion 610b are formed into two divided shapes. That is, the inner cylinder member 610 has a cylindrical shaft portion 411 and a radial direction from the shaft portion 411 by bringing the divided surfaces of the first inner cylinder portion 610a and the second inner cylinder portion 610b into contact with each other. It is formed in the same shape as the inner cylinder member 410 having a spherical bulging portion 412 that bulges outward (see FIG. 18A).
- the outer cylinder member 620 (first outer cylinder part 621 and second outer cylinder part 622) in the sixth embodiment is the same as the outer cylinder member 420 (first outer cylinder part 421 and second outer cylinder part in the fourth embodiment). 422) (see FIG. 13 (b)), the cross-sectional shape is formed into a shape extending in the direction of the axis O at the part where the section is curved in an arc shape.
- the first outer cylinder portion 621 is located on one end side in the axis O direction (upper side in FIG. 17), and is connected to a cylindrical portion having a substantially constant diameter and the cylindrical portion, and a split surface ( The cross-sectional shape in which the diameter is gradually increased toward the lower end surface in FIG.
- the vulcanized molded body E is obtained by vulcanizing and molding the first rubber portion 631 in a vulcanization mold in which the first inner cylinder portion 610a and the first outer cylinder portion 621 are installed, and expanding the first inner cylinder portion 610a. It is manufactured by connecting the outer peripheral surface of the protruding portion 412 and the concave inner peripheral surface IS of the first outer cylinder portion 621 with a first rubber portion 631. That is, the vulcanized molded body E has the same shape (configuration) in the upper half and the lower half shown in FIG.
- the divided surface of the first inner cylinder portion 610a and the divided surface of the first outer cylinder portion 621 are arranged at the same position in the direction of the axis O (that is, both divided surfaces are the same).
- the first rubber portion 631 is positioned so as to recede in the axis O direction from the dividing surface of the first inner cylinder portion 610a and the dividing surface of the first outer cylinder portion 621. It is formed.
- the first rubber portion 631 includes the first inner cylinder portion 610a between the outer peripheral surface of the bulging portion 412 of the first inner cylinder portion 610a and the concave inner peripheral surface IS of the first outer cylinder portion 621.
- the split surface side of the 1st outer cylinder part 621 is open
- FIG. 18A is a cross-sectional view of the vulcanized molded body E that has been subjected to drawing in the outer cylinder drawing step and the cylindrical member 440 in a state before drawing in the cylindrical member drawing step.
- FIG. 18B is a cross-sectional view of the vibration isolator 600 in a state after the cylindrical member 440 has been subjected to drawing processing in the cylindrical member drawing step.
- the vulcanized molded body E was subjected to drawing processing on the first outer cylinder portion 621 and the second outer cylinder portion 622 in the outer cylinder drawing step, and the outer diameter was reduced. Then, it inserts in the cylindrical member 440 along the axis
- the divided surface of the first inner cylinder part 610a and the divided surface of the second inner cylinder part 610b are brought into contact with each other, and the inner cylinder member 610 is moved by a jig (not shown).
- Drawing is applied to the outer cylindrical member 620 or the cylindrical member 440 in a state where the pressure is held from both sides in the axis O direction.
- the first outer cylinder part 621 and the second outer cylinder part 622 are also in a state in which the divided surfaces are in contact with each other.
- the first outer cylinder part 621 and the second outer cylinder part 622 can be held and fixed by the cylindrical member 440 in a state where the part 610b and the split surface of the second outer cylinder part 622 are in contact with each other. Therefore, it is possible to avoid the preliminary compression in the direction of the axis O being applied to the first rubber portion 631 and the second rubber portion 632.
- a space SP can be formed between the dividing surface of the first rubber portion 631 and the dividing surface of the second rubber portion 632, and the space SP reduces the spring constant in the twisting direction and the spring constant in the direction perpendicular to the axis O.
- the spring constant in the direction of the axis O can be increased.
- the space SP is set between the divided surface of the first rubber portion 631 and the divided surface of the second rubber portion 632, and the first outer cylinder portion 621 is divided. Since the surface and the split surface of the second outer cylinder part 622 can be kept in contact with each other, the first outer cylinder part 621 and the second outer cylinder part 622 are separated from each other inside the cylindrical member 440. It is possible to restrict movement in the direction in which the surfaces are brought close to each other.
- the first outer cylinder portion 421 and the second outer cylinder are provided on the one end side in the axis O direction and the other end side in the axis O direction excluding the central portion in the axis O direction of the cylindrical member 440.
- the diameter of the portion 422 is reduced to a shape close to the outer peripheral surface of the concave inner peripheral surface IS of the concave inner peripheral surface IS (that is, a portion where the cross-sectional shape is curved in an arc shape) (inward in the radial direction in a cross-sectional view). Therefore, the movement of the first outer cylinder part 621 and the second outer cylinder part 622 in the direction in which the divided surfaces are separated from each other can be restricted with respect to the cylindrical member 440.
- the movement is restricted by the contact of the divided surfaces, and the divided surfaces are also made.
- the movement can be restricted by the portion of the cylindrical member 440 on one end side in the axis O direction or the other end side in the axis O direction.
- FIG. 19 is a cross-sectional view of a vibration isolator 700 according to the seventh embodiment.
- the stopper protruding portion 713 protrudes radially outward from the center portion in the axis O direction of the bulging portion 412 on the inner cylinder member 710.
- the stopper projecting portion 713 is formed continuously in the circumferential direction, and its projecting tip surface is formed as an outer peripheral surface of a cylinder centering on the axis O (that is, the projecting tip surface is an axis O in the cross-sectional view shown in FIG. 19). Formed in a straight line parallel to the
- the outer cylinder member 720 (first outer cylinder part 721 and second outer cylinder part 722) is different from the outer cylinder member 420 (first outer cylinder part 421 and second outer cylinder part 422) in the fourth embodiment (see FIG. 13 (b)), the sectional shape of the portion whose cross-sectional shape is curved in an arc shape is formed in a shape shortened in the axis O direction. Therefore, the dimension of the space SP in the axis O direction is increased with respect to the vibration isolator 400 according to the fourth embodiment.
- a separation dimension along the axis O direction between the dividing surface of the first outer cylinder portion 721 and the dividing surface of the second outer cylinder portion 722 is set to a size that allows a stopper rubber portion 735 to be described later to pass.
- the rubber base 730 includes a stopper rubber portion 735 that covers the entire stopper protruding portion 713, and the stopper rubber portion 735 includes the concave inner peripheral surface and the inner cylinder of the first outer cylinder portion 721 and the second outer cylinder portion 722.
- the first rubber portion 731 and the second rubber portion 732 are connected to the outer peripheral surface of the bulging portion 412 of the member 710, respectively.
- the stopper rubber portion 735 has a thickness dimension (dimension in the left-right direction in FIG. 19) such that a predetermined gap is formed in the radial direction between the outer peripheral surface and the inner peripheral surface of the cylindrical member 440.
- the stopper protruding portion 713 is inserted into the tubular member 440 via the stopper rubber portion 735. It is possible to exert a stopper function for restricting the deformation of the rubber base body 730 due to the input displacement to a predetermined amount. Thereby, the durability of the rubber base 730 can be improved.
- the portions for performing the stopper function are divided between the divided surface of the first rubber portion 731 and the divided surface of the second rubber portion 732. Since the space can be accommodated in the space SP formed between them, the durability of the rubber base 730 can be improved by exhibiting the stopper function, and the space SP that becomes a dead space can be effectively used to reduce the size of the vibration isolator 700. Can be achieved.
- a part or all of the vibration isolator in each of the above embodiments is combined with a part or all of the vibration isolator in the other embodiment, or a part or all of the vibration isolator in the other embodiment.
- a vibration isolator may be configured.
- the bulging portion 412 of the inner cylinder member 710 in the seventh embodiment is replaced with the bulging portion 512 of the inner cylinder member 510 in the fifth embodiment, and the stopper protruding portion is added to the resin bulging portion 512. 713 may be combined and formed integrally. Since it is not necessary to perform a cutting process or a complicated forging process for forming the stopper protruding portion 713, it is possible to improve the yield and reduce the manufacturing cost.
- the first rubber part 31 and the second rubber part 32 are divided (the respective divided surfaces are separated in the axis O direction).
- the present invention is not necessarily limited thereto, and a part of the dividing surface of the first rubber part 31 and the dividing surface of the second rubber part 32 (the outer peripheral surface of the bulging part 12 of the inner cylinder member 10) (A part of the side) may be connected.
- the fourth and fifth embodiments the case where the divided surface of the first rubber portion 431 and the divided surface of the second rubber portion 432 are partially connected is described, but the present invention is not necessarily limited thereto.
- the first rubber part 431 and the second rubber part 432 may be divided.
- the divided surfaces of the first outer cylinder portions 21 and 321 and the divided surfaces of the second outer cylinder portions 22 and 322 in the completed state (state of the vibration isolator 100 to 300).
- the present invention is not necessarily limited to this, and in the completed state, the divided surfaces of the first outer cylinder portions 21 and 321 and the divided surfaces of the second outer cylinder portions 22 and 322 May be in contact with each other.
- the rubber base 430 (the first rubber portion 31 and the first rubber portion 31) is moved to a position where the split surfaces of the first outer cylinder portions 21 and 321 and the split surfaces of the second outer cylinder portions 22 and 322 abut. 2) the rubber part 32) is compressed in the direction of the axis O, and in this state, the cylindrical member 40 is drawn in the cylindrical member drawing process, and in the bending process, the end of the cylindrical member 40 in the axial O direction direction.
- the vibration isolator 100 to 300 may be manufactured so as to be in the above state by bending.
- the rubber base compression step may be omitted. That is, after the outer cylinder squeezing process, the process may be shifted to the cylindrical member squeezing process without performing the rubber base compression process (without providing the rubber base 430 with preliminary compression in the axis O direction).
- the rubber film portions 33, 34, 233, 234, 431a, 431b are covered on the outer peripheral surface of the outer cylinder member 20, 320, 420, 620, 720 has been described.
- the rubber film portions 33, 34, 233, 234, 431 a and 431 b may be provided on the inner peripheral surface of the cylindrical members 40 and 440 instead of or in addition to this. .
- the vibration isolator 100 to 300 may be manufactured by omitting. That is, the vulcanized molded products A to C are formed on the cylindrical member 40 by the holding force between the cylindrical member 40 that has been subjected to drawing processing in the cylindrical member drawing step and the rubber film portions 33, 34, 333, and 334. You may hold
- the description is omitted, but through holes may be formed in the first outer cylinder portions 21 and 321 and the second outer cylinder portions 22 and 322. Since the fluidity of the rubber-like elastic body in the vulcanization molding process can be ensured by the through holes, the yield of the rubber film portions 33, 34, 333, 334 connected to the first rubber portion 31 and the second rubber portion 32 is increased. be able to.
- the description is omitted, but after the bending step, the inner cylinder members 10, 410, 510, 610, 710 are subjected to diameter expansion processing (the inner cylinder member 10 is compressed in the direction of the axis O, and the axis O You may give the process which expands the area of a seat surface by enlarging a direction edge part.
- the outer cylinder squeezing step is performed (outer cylinder members 20, 420, 620, 720 (first outer cylinder portions 21, 421, 621, 721 and second cylinders).
- outer cylinder members 20, 420, 620, 720 first outer cylinder portions 21, 421, 621, 721 and second cylinders.
- the present invention is not necessarily limited to this, and the outer cylinder drawing step is omitted and the vibration isolation devices 100, 200, 400 to 700 may be manufactured.
- the present invention is not necessarily limited thereto, and the outer cylinder member 320 may be formed by forging or cutting, for example.
- the case where the rubber base compression step is omitted has been described.
- the invention is not necessarily limited to this, and the rubber bases 430, 630, and 730 are moved in the axis O direction by the rubber base compression step.
- the anti-vibration devices 400 to 700 may be manufactured in a state where the preliminary compression is applied.
- the present invention is not necessarily limited to this, and is formed intermittently in the circumferential direction. Also good.
- the “concave spherical surface” described in claim 1 does not require a complete spherical shape, but is formed as a concave surface disposed opposite to the convex spherical surface at least in the bulging portion of the inner cylinder member. If it is done, it is enough.
- “concentric with a convex spherical surface” does not require that the centers coincide completely, and the center of the concave spherical surface is viewed from the first outer cylindrical portion and the second outer cylindrical portion, This means that it suffices if it is located on the same side as the center of the convex spherical surface.
- Vibration isolator 10 410, 510, 610, 710 Inner cylinder member 610a First inner cylinder part 610b Second inner cylinder part 12, 412 Swelling part 713 Stopper protrusion 20, 320, 420, 620, 720 Outer cylinder member 21, 321, 421, 621, 721 First outer cylinder part 22, 322, 422, 622, 722 Second outer cylinder part IS Concave inner peripheral surface 30, 430, 630 , 730 Rubber base 31,431,631,731 First rubber part 32,432,632,732 Second rubber part 33,333,431a, 431b Rubber film part 34,334,432a, 432 Rubber film portion 735 stopper rubber portion 40,440 tubular member O shaft SP space
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Abstract
Description
10,410,510,610,710 内筒部材
610a 第1内筒部
610b 第2内筒部
12,412 膨出部
713 ストッパ突出部
20,320,420,620,720 外筒部材
21,321,421,621,721 第1外筒部
22,322,422,622,722 第2外筒部
IS 凹状内周面
30,430,630,730 ゴム基体
31,431,631,731 第1ゴム部
32,432,632,732 第2ゴム部
33,333,431a,431b ゴム膜部
34,334,432a,432b ゴム膜部
735 ストッパゴム部
40,440 筒状部材
O 軸
SP 空間
Claims (8)
- 径方向外方へ向けて膨出する球状の膨出部を軸方向中央に有する内筒部材と、
前記内筒部材の膨出部における凸状の球面と同心状の凹状の球面に形成され前記内筒部材の膨出部を取り囲む凹状内周面を有すると共に、前記内筒部材の外周側に配設される外筒部材と、
前記内筒部材の膨出部の外周面および外筒部材の凹状内周面の間を連結すると共にゴム状弾性体から構成されるゴム基体とを備えた防振装置において、
筒状に形成され前記外筒部材の外周側に配設されると共に前記外筒部材を保持固定する筒状部材を備え、
前記外筒部材が、第1外筒部と第2外筒部とに軸方向に2分割されると共に、前記ゴム基体が、前記内筒部材の膨出部の外周面および第1外筒部における凹状内周面の間を連結する第1ゴム部と、前記内筒部材の膨出部の外周面および第2外筒部における凹状内周面の間を連結する第2ゴム部とに少なくとも前記外筒部材側で軸方向に2分割され、
前記第1ゴム部の分割面と第2ゴム部の分割面とが軸方向に離間し互いの分割面の間に空間が形成された状態で、前記第1外筒部および第2外筒部が前記筒状部材により保持固定されることを特徴とする防振装置。 - 前記内筒部材の膨出部における最大の外径寸法が、前記第1外筒部および第2外筒部の軸方向端部開口における最小の内径寸法よりも大きくされることを特徴とする請求項1記載の防振装置。
- 前記第1外筒部および第2外筒部は、板厚が一定の素材から前記凹状内周面を備える形状に形成され、
前記第1外筒部および第2外筒部に絞り加工が施された状態で、前記第1外筒部および第2外筒部が前記筒状部材により保持固定されることを特徴とする請求項1又は2に記載の防振装置。 - 前記第1外筒部および第2外筒部の外周面または前記筒状部材の内周面の少なくとも一方の少なくとも一部に覆設されると共にゴム状弾性体から構成されるゴム膜部を備え、
前記第1外筒部および第2外筒部と筒状部材とが金属材料からなり、
前記筒状部材に絞り加工が施されることで、前記第1外筒部および第2外筒部が前記筒状部材により保持固定されることを特徴とする請求項1から3のいずれかに記載の防振装置。 - 前記第1外筒部および第2外筒部の外周面および前記筒状部材の内周面の内の前記第1外筒部および第2外筒部の外周面のみに前記ゴム膜部が覆設され、
前記ゴム膜部が前記第1ゴム部または第2ゴム部の少なくとも一方に連なることを特徴とする請求項4記載の防振装置。 - 軸方向における前記膨出部の中央部から径方向外方へ向けて突出されるストッパ突出部と、
前記ストッパ突出部に覆設されると共にゴム状弾性体から構成され前記第1ゴム部または第2ゴム部の少なくとも一方に連なるストッパゴム部とを備え、
前記第1外筒部の分割面と第2外筒部の分割面とが軸方向に離間されると共に、前記ストッパゴム部の外周面と前記筒状部材の内周面とが径方向に離間され、前記第1外筒部および第2外筒部の分割面の間を介して前記ストッパゴム部の外周面が前記筒状部材の内周面に当接可能とされることを特徴とする請求項1から5のいずれかに記載の防振装置。 - 前記内筒部材が、軸方向における前記膨出部の中央部で第1内筒部と第2内筒部とに2分割され、
前記第1内筒部の分割面および第1外筒部の分割面が同じ軸方向位置に配置される状態で、前記第1内筒部における膨出部の外周面および前記第1外筒部における凹状内周面の間が前記第1ゴム部により連結されると共に、前記第1ゴム部が前記第1外筒部の分割面および第1内筒部の分割面よりも軸方向に後退して位置し、
前記第2内筒部の分割面および第2外筒部の分割面が同じ軸方向位置に配置される状態で、前記第2内筒部における膨出部の外周面および前記第2外筒部における凹状内周面の間が前記第2ゴム部により連結されると共に、前記第2ゴム部が前記第2外筒部の分割面および第2内筒部の分割面よりも軸方向に後退して位置し、
第1内筒部および第1外筒部の分割面と第2内筒部および第2外筒部の分割面とを当接させた状態で、前記第1外筒部および第2外筒部が前記筒状部材により保持固定されることを特徴とする請求項1から5のいずれかに記載の防振装置。 - 前記第1外筒部および第2外筒部は、板厚が一定の素材から前記凹状内周面を備える形状に形成されることで、前記凹状内周面の背面側となる外周面が軸方向端部へ向かうほど縮径された形状とされ、
前記筒状部材には、絞り加工が施され、前記筒状部材の軸方向一端側および軸方向他端側が、前記第1外筒部および第2外筒部の前記凹状内周面の背面側となる外周面に沿って縮径された形状に形成されることを特徴とする請求項7記載の防振装置。
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MX2014010604A MX2014010604A (es) | 2012-03-20 | 2012-12-28 | Amortiguador de vibracion. |
US14/368,470 US10316920B2 (en) | 2012-03-20 | 2012-12-28 | Anti-vibration device |
DE112012005861.5T DE112012005861B4 (de) | 2012-03-20 | 2012-12-28 | Antischwingungsvorrichtung |
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Also Published As
Publication number | Publication date |
---|---|
US20150014906A1 (en) | 2015-01-15 |
JP2013224728A (ja) | 2013-10-31 |
MX2014010604A (es) | 2014-11-25 |
DE112012005861T5 (de) | 2015-04-16 |
JP5400929B2 (ja) | 2014-01-29 |
DE112012005861B4 (de) | 2022-01-05 |
CN103987988A (zh) | 2014-08-13 |
CN103987988B (zh) | 2016-08-24 |
US10316920B2 (en) | 2019-06-11 |
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