JP2007263148A - Member mount and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a member mount having novel construction actualizing sufficient durability by giving effective pre-compression on a body rubber elastic material and allowing easy reuse of an inner cylinder member having no problem of deterioration, and to provide its novel manufacturing method. <P>SOLUTION: The body rubber elastic material 16 is formed with an integrally vulcanized molding 40 having an outer cylinder member 14 vulcanized and adhered onto the outer peripheral face. An outer periphery rubber 32 is fixed and formed onto the outer peripheral face of the outer cylinder member 14. On the other hand, the inner cylinder member 12 is formed separately of the body rubber elastic material 16 and pressed and assembled into a center hole 34 of the body rubber elastic material 16. The outer diameter size of the inner cylinder member 12 is larger than the inner diameter size of the center hole 34 of the body rubber elastic material 16. The inner cylinder member 12 is pressed therein to give radial previous compression to the body rubber elastic material 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a member mount for vibration-proofing and supporting a member member such as a suspension member with respect to a vehicle body body in an automobile and a method for manufacturing the same.

  Conventionally, a member for attaching a member member such as a subframe to a vehicle body body of an automobile has a vibration isolator for the purpose of reducing vibration transmission from a member member side to which a wheel or a power unit is attached to the vehicle body body side. A kind of member mount is mounted.

  Such a member mount generally has a structure in which an inner cylinder fitting and an outer cylinder fitting are connected by a thick-walled cylindrical rubber elastic body as described in Patent Document 1 (Japanese Patent Laid-Open No. 07-004457). Has been. Such a member mount fixes the inner cylinder member to the vehicle body with a fixing bolt or the like inserted through the inner cylinder fitting, and press-fits and fixes the outer cylinder fitting to the mounting hole formed in the member member. It comes to be installed.

  However, the mounting hole in the member mount has a problem that it is difficult to ensure sufficient dimensional accuracy. In particular, in a thick member mount, it is inevitable that a manufacturing error increases with respect to the inner diameter of the mounting hole for reasons of processing accuracy. Therefore, even if the outer diameter dimension of the outer cylinder fitting in the member mount is managed with high accuracy, the outer cylinder fitting cannot be press-fitted into the mounting hole of the member mount, or the press-fit fixing force cannot be obtained sufficiently. There is a fear.

  Therefore, in order to deal with such a problem, as described in Patent Document 2 (Japanese Patent Laid-Open No. 10-252797), for example, a rubber elastic layer (rubber elastic protrusion) is formed on the outer peripheral surface of the outer cylindrical fitting of the member mount. It is proposed that the inner diameter error in the mounting hole of the member mount is absorbed by elastic deformation of the rubber elastic layer.

  However, if a rubber elastic layer is formed on the outer peripheral surface of the outer cylinder fitting, effective pre-compression cannot be applied to the main rubber elastic body, which makes it difficult to obtain the intended durability. It was. That is, in the member mount, the outer cylinder fitting is reduced in diameter after vulcanization molding of the main rubber elastic body in order to reduce the tensile stress of the main rubber elastic body when vibration load is input and to improve the durability. Thus, it is desirable to pre-compress the main rubber elastic body. However, if a rubber elastic layer is formed on the outer peripheral surface of the outer tube fitting, the rubber elastic layer is easily damaged when the outer tube fitting is subjected to diameter reduction processing. In reality, the diameter is greatly limited, and the desired durability improvement effect cannot be expected.

  In addition, the member mount having a conventional structure is formed as an integrally vulcanized molded product of a main rubber elastic body in which an inner cylinder fitting and an outer cylinder fitting are vulcanized and bonded. For this reason, when the main rubber elastic body needs to be replaced due to deterioration, the entire member mount is disposed of, which makes it extremely difficult to reuse. In particular, due to the recent increase in recycling awareness, it is desirable to reuse, for example, inner cylinder fittings that do not cause degradation. However, in order to achieve this, a considerable amount of labor and cost is required, which is difficult in practice. It is.

Japanese Unexamined Patent Publication No. 07-004457 Japanese Patent Laid-Open No. 10-252797

  Here, the present invention has been made in the background as described above, and the problem to be solved is to realize sufficient durability by applying effective pre-compression to the main rubber elastic body. Another object of the present invention is to provide a member mount having a new structure and a new method for manufacturing the member mount that can be easily reused of an inner cylinder member that can be used without deterioration.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible. Further, aspects or technical features of the present invention are not limited to those described below, but are described in the entire specification and drawings, or an invention that can be understood by those skilled in the art from those descriptions. It should be understood that it is recognized based on thought.

  That is, the feature of the present invention is that the inner cylinder member and the outer cylinder member that are spaced apart from each other in the radial direction are connected by the thick-walled cylindrical rubber elastic body, and the inner cylinder member is fixed to the vehicle body. In addition, in the vehicle member mount in which the outer cylindrical member is press-fitted and fixed in the mounting hole of the member member, the member member is vibration-supported on the vehicle body, and the main rubber elastic body is disposed on the outer circumferential surface of the outer cylinder member. The member is composed of an integrally vulcanized molded product having vulcanized and bonded members, and an outer peripheral rubber is fixedly formed on the outer peripheral surface of the outer cylindrical member, while the inner cylindrical member is formed separately from the main rubber elastic body. The main body rubber elastic body is press-fitted into the central hole and assembled, and the outer diameter of the inner cylinder member is made larger than the inner diameter dimension of the central hole of the main rubber elastic body so that the main body rubber is pressed into the main rubber member. Radial pre-compression against elastic body There to be had.

  In the member mount having the structure according to the present invention, the inner cylindrical member is formed separately from the main rubber elastic body, and the outer diameter of the inner cylindrical member is the center hole of the main rubber elastic body. By making it larger than the inner diameter, effective pre-compression can be exerted on the main rubber elastic body by press-fitting the inner cylinder member into the main rubber elastic body. Therefore, problems such as damage to the main rubber elastic body due to the tensile stress acting on the main rubber elastic body can be easily reduced or avoided, and the durability can be improved.

  Moreover, since the effective compression can be exerted on the main rubber elastic body by press-fitting the inner cylindrical member into the main rubber elastic body, the diameter reduction processing on the outer cylinder member becomes unnecessary. Therefore, the damage of the outer peripheral rubber due to the diameter reduction processing of the outer tube metal fitting is completely avoided, and the dimensional error of the mounting hole formed in the member member is effectively absorbed by the outer peripheral rubber, so that the size of the mounting hole is reduced. It is possible to cope with variations highly.

  Furthermore, the inner cylinder member is formed as a separate body from the main rubber elastic body, and is assembled by press-fitting. Therefore, when the member mount is discarded due to deterioration of the main rubber elastic body, the inner cylinder member can be easily separated from the deteriorated main rubber elastic body, and the separated inner cylinder member can be effectively reused. I can do it.

  Further, in the member mount having a structure according to the present invention, the outer cylindrical member has a flange portion that extends radially outward at an axial end located on the rear side in the press-fitting direction of the member member into the mounting hole. While being formed integrally, a buffer rubber projecting outward in the axial direction from the flange portion is formed. On the other hand, the inner cylinder member is formed rearward in the press-fitting direction into the center hole of the main rubber elastic body. A stopper member that spreads radially outward is fixed to the axial end portion that is positioned, and the stopper member of the inner cylinder member is buffered in the axial direction via the buffer rubber with respect to the flange portion of the outer cylinder member. It is desirable that the axial direction stopper mechanism is configured by being brought into contact with the contact member.

  According to this, the stopper mechanism in the axial direction can be integrally formed while the stopper mechanism in the axial direction avoids adverse effects on productivity and assembly workability. Moreover, since the stopper member is fixed to the inner cylinder member, not only the inner cylinder member but also the stopper member can be reused when discarding the member mount.

  Further, in the member mount having a structure according to the present invention, the axially intermediate portion of the main body rubber elastic body is formed with an engaging protrusion projecting on the outer peripheral surface at the axially intermediate portion of the inner cylindrical member. An engagement concave portion is formed on the inner peripheral surface of the main body, and the engagement protrusion is fitted into and engaged with the engagement concave portion in a state where the inner cylinder member is press-fitted into the main rubber elastic body. The configuration is preferably adopted.

  According to this, the inner cylinder is formed by the engagement of the engaging protrusion formed on the axially intermediate portion of the inner cylindrical member and the engaging recess formed on the inner peripheral surface of the axially intermediate portion of the main rubber elastic body. The member and the main rubber elastic body are tightened more firmly in the axial direction. Therefore, it is possible to prevent the inner cylinder member from being pulled out from the main rubber elastic body in the axial direction, and to advantageously obtain load resistance in the axial direction.

  Further, in the member mount having a structure according to the present invention, the inner cylindrical member is constituted by a cylindrical metal fitting, and a synthetic resin material is formed on both the outer peripheral surface and the inner peripheral surface of the cylindrical metal fitting. The synthetic resin material has a configuration in which the engagement protrusion is formed on the outer peripheral surface of the cylindrical metal fitting, while an inner hole having an oval cross section is formed on the inner peripheral surface of the cylindrical metal fitting. More preferably employed.

  According to this, the engagement protrusion for improving the pull-out resistance in the axial direction of the inner cylinder member and the main rubber elastic body, and the inner hole of the oval cross section in the inner cylinder member are integrally formed by the synthetic resin material. The engaging protrusions and the inner holes can be easily formed in a predetermined shape.

  Further, according to the present invention, an inner cylinder member and an outer cylinder member that are spaced apart from each other in the radial direction are connected by a thick-walled cylindrical rubber elastic body, and the inner cylinder member is fixed to the vehicle body and the outer cylinder A method of manufacturing a vehicle member mount in which a member is press-fitted and fixed in a mounting hole of a member member, so that the member member is supported by vibration isolation in the vehicle body, wherein the main rubber elastic body is attached to the outer peripheral surface of the body rubber elastic body. A rubber molding process in which a cylindrical member is formed as an integrally vulcanized molded article having a vulcanized adhesive, and an outer peripheral rubber is molded on the outer peripheral surface of the outer cylindrical member to be vulcanized and bonded, and the integral obtained in the rubber molding process. A step of preparing the inner cylinder member formed separately from the integral vulcanized molded product having an outer diameter larger than the inner diameter of the center hole of the main rubber elastic body in the vulcanized molded product, and the integral vulcanization The rubber elasticity of the body in the molded product A method of manufacturing a member mount for a vehicle, including a step of applying radial pre-compression to the main rubber elastic body by press-fitting and assembling the inner cylinder member in the axial direction with respect to the center hole of Features.

According to the method of manufacturing a vehicle member mount according to the present invention as described above, the inner rubber member formed separately from the main rubber elastic body is press-fitted into the central hole of the main rubber elastic body, thereby It is possible to easily and effectively manufacture a member mount that can exert excellent pre-compression on the body and exhibit excellent durability.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 shows a mounted state of a vehicle member mount 10 according to an embodiment of the present invention with respect to a vehicle. 2 and 3, the member mount 10 has a structure in which an inner metal fitting 12 as a cylindrical metal fitting and an outer cylinder metal fitting 14 as an outer cylinder member are elastically connected by a main rubber elastic body 16. Have. As shown in FIG. 1, the inner metal member 12 is fixed to the vehicle body 17 side, and the outer tubular metal member 14 is fixed to the member member 18 side, whereby the member member 18 is attached to the vehicle body 17. Anti-vibration is supported. In the following description, the vertical direction means the vertical direction in FIG. 1 unless otherwise specified.

  More specifically, the inner metal fitting 12 is made of a metal such as an aluminum alloy, and has a thick cylindrical shape, and penetrates the peripheral wall portion in a direction perpendicular to the axis at a part of the middle in the axial direction. A small-diameter circular hole 19 is formed.

  Further, an inner peripheral resin layer 20 is formed on the inner peripheral surface of the inner metal fitting 12 so as to cover substantially the entire surface. The inner peripheral resin layer 20 as a whole has a thin, substantially cylindrical shape extending in the axial direction with a substantially constant cross-sectional shape, and an inner hole 22 extending over the entire length in the axial direction is formed in the central portion in the radial direction. Have. Further, as shown in FIG. 3, the inner peripheral resin layer 20 is formed such that a part of the periphery facing in one direction perpendicular to the axis is thicker than the other part, and the inner peripheral resin layer 20 On the inner peripheral surface of the layer 20, a pair of flat surfaces 24 that extend in parallel to face each other in the radial direction are formed. Thereby, the inner diameter dimension of the inner peripheral resin layer 20 is reduced in the opposing direction of the pair of flat surfaces 24, and the inner hole 22 formed in the inner peripheral resin layer 20 has a substantially constant oval cross section in the axial direction. It extends linearly.

  Further, as shown in FIGS. 2 and 3, the synthetic resin material forming the inner peripheral resin layer 20 is formed on the outer periphery of the inner metal member 12 through a circular hole 19 formed through the peripheral wall portion of the inner metal member 12. The outer peripheral resin protrusion 26 as an engaging protrusion is integrally formed with the inner peripheral resin layer 20 on the outer peripheral surface of the inner metal member 12 by using such a synthetic resin material. The outer peripheral resin protrusion 26 has a substantially annular shape extending continuously in the circumferential direction as a whole, and is formed to protrude with a predetermined dimension in a direction perpendicular to the axis at a part in the middle of the inner metal member 12 in the axial direction. Yes. In short, the inner metal member 12 is formed with a synthetic resin material on both the inner peripheral surface and the outer peripheral surface, and the inner resin layer 20 is formed on the inner peripheral surface side of the inner metal member 12 by the synthetic resin material. On the other hand, an outer peripheral resin protrusion 26 is formed on the outer peripheral surface side of the inner metal member 12.

  Furthermore, a lower stopper fitting 28 as a stopper member is fixed to the lower end edge of the inner fitting 12. The lower stopper fitting 28 has a large-diameter substantially disk shape as a whole, is disposed on the same central axis as the inner fitting 12, is superimposed on the lower end surface of the inner fitting 12, and is welded or the like. It is fixed to the inner metal fitting 12. Further, a bolt insertion hole penetrating in the axial direction is formed at a substantially central portion in the radial direction of the lower stopper fitting 28 so that a fixing bolt 55 described later can be inserted therethrough.

  On the other hand, as shown in FIG. 4, the outer cylinder fitting 14 is formed of a metal material such as an aluminum alloy, for example, and has a thin cylindrical shape with a large diameter as a whole. A flange portion 30 that extends outward in the direction perpendicular to the axis is integrally formed at the lower end portion in the axial direction of the outer cylinder fitting 14. In addition, a press-fit rubber 32 as an outer peripheral rubber having a thin annular shape extending continuously in the circumferential direction is formed on the outer peripheral surface of the outer cylindrical metal member 14. A plurality of the press-fitting rubbers 32 are formed on the outer peripheral surface of the outer tubular fitting 14 with a predetermined interval in the axial direction.

  Further, the main rubber elastic body 16 is vulcanized and bonded to the inner peripheral surface of the outer cylinder fitting 14. As shown in FIG. 4, the main rubber elastic body 16 has a thick, generally cylindrical shape as a whole, and has a central hole 34 penetrating the radial center portion in the axial direction. Further, the inner peripheral surface at the upper end in the axial direction of the main rubber elastic body 16 has a tapered shape that gradually decreases in diameter toward the upper side in the axial direction. Furthermore, an engaging groove 36 as an engaging recess opening in the inner peripheral surface of the main rubber elastic body 16 is formed in the axial intermediate portion of the main rubber elastic body 16. The engaging groove 36 is continuously formed over the entire circumference in the circumferential direction in a substantially constant groove shape on the inner circumferential surface of the main rubber elastic body 16. Furthermore, the inner peripheral surface of the lower end portion in the axial direction of the main rubber elastic body 16 has a tapered shape that gradually increases in diameter downward in the axial direction. In addition, the upper end surface of the main rubber elastic body 16 is formed by an inclined surface that is inclined so that the radially inner side is gradually positioned upward in the axial direction.

  Further, the main rubber elastic body 16 is formed with a set of lightening portions 38 that are opposed to both sides of the center in one radial direction. The thinned portion 38 is formed with a predetermined length in the circumferential direction at the radial intermediate portion of the main rubber elastic body 16 and penetrates the main rubber elastic body 16 in the axial direction. Due to the thinned portion 38, the spring characteristics of the main rubber elastic body 16 in two directions perpendicular to the axis perpendicular to each other are made different from each other.

  The main rubber elastic body 16 has an outer peripheral surface vulcanized and bonded to the inner peripheral surface of the outer cylinder fitting 14, and as shown in FIG. It is formed as a molded product 40. Further, on the lower surface of the flange portion 30 of the outer cylindrical metal fitting 14, a shock absorbing rubber 42 that is integrally formed with the main rubber elastic body 16 and extends in a predetermined length in the circumferential direction is attached and is formed downward in the axial direction. Protruding. The main rubber elastic body 16 has its upper end in the axial direction positioned slightly below the upper end of the outer cylinder fitting 14, and its lower end in the axial direction protrudes below the lower end of the outer cylinder fitting 14. ing.

  Here, the outer diameter dimension of the inner metal fitting 12 is made larger than the inner diameter dimension of the main rubber elastic body 16, and the inner metal fitting 12 is press-fitted into the central hole 34 of the main rubber elastic body 16 from below in the axial direction. . As shown in FIG. 2, the inner metal fitting 12 is fixed to the center hole 34 of the main rubber elastic body 16 so as to penetrate the main rubber elastic body 16 on the central axis as shown in FIG. 12 and the outer cylinder fitting 14 are elastically connected via a main rubber elastic body 16. Thereby, the member mount 10 in this embodiment is comprised.

  Further, the outer diameter of the inner metal fitting 12 is sufficiently larger than the inner diameter of the main rubber elastic body 16 and the inner metal fitting 12 is press-fitted into the center hole 34 of the main rubber elastic body 16. The central hole 34 of the main rubber elastic body 16 is expanded by the inner metal fitting 12, and the main rubber elastic body 16 is compressed between the opposing surfaces of the inner metal fitting 12 and the outer cylindrical metal fitting 14.

  Furthermore, in the present embodiment, an outer peripheral resin protrusion 26 that protrudes outward in the direction perpendicular to the axis with respect to the outer peripheral surface of the inner metal member 12 is fixedly formed, and the inner periphery of the main rubber elastic body 16 An engaging groove 36 is formed on the surface. Then, in a state where the inner metal fitting 12 is press-fitted and fixed to the main rubber elastic body 16, the outer peripheral resin protrusion 26 is fitted into the engagement groove 36, and the outer resin protrusion 26 and the engagement groove 36 are formed. They can be engaged with each other. As a result, it is possible to advantageously obtain the pull-out resistance in the axial direction between the inner metal member 12 and the main rubber elastic body 16, and the inner metal member 12 and the main rubber elastic body 16 can be positioned and fixed in the axial direction.

  Further, the lower stopper fitting 28 fixed to the lower edge of the inner fitting 12 has its inner peripheral portion overlapped with the inner peripheral portion of the main rubber elastic body 16 in the axial direction, while its radial intermediate portion is the main body. The shock absorbing rubber 42 integrally formed with the rubber elastic body 16 is positioned at a predetermined distance in the axial direction. Furthermore, the upper end part of the inner metal fitting 12 is projected from the main rubber elastic body 16 toward the upper side in the axial direction.

  On the other hand, in the state where the inner metal fitting 12 is press-fitted into the integrally vulcanized molded product 40 of the main rubber elastic body 16, as shown in FIG. 5, the outer cylinder metal fitting 14 is formed on the member member 18. It is fixed to the attaching portion 44. The assembly portion 44 has a press-fit hole 46 as a mounting hole that exhibits a certain circular cross section and extends in the axial direction, and the outer tubular fitting 14 of the member mount 10 is press-fitted from below in the axial direction into the press-fit hole 46. Thus, the member mount 10 is fixedly assembled to the member member 18. Further, the lower end portion of the assembly portion 44 is formed in a flange shape that extends outward in the direction perpendicular to the axis, and is overlapped with the flange portion 30 of the outer cylindrical metal member 14 from above in the axial direction. The member member 18 is positioned in the axial direction. Moreover, the upper end part of the assembly | attachment part 44 is made into the shape of the inner flange bent by the axial orthogonal direction inward.

  Further, an upper stopper member 48 is disposed above the inner metal member 12 in the axial direction, as shown in FIG. The upper stopper member 48 has a substantially cylindrical shape as a whole, and includes a stopper substrate 50 and a stopper rubber 52. The stopper substrate 50 is formed of a substantially annular plate-shaped metal material. The stopper rubber 52 has a substantially cylindrical shape, and the lower portion in the axial direction is thinner than the upper portion, and the width is gradually narrowed downward in the axial direction. In addition, a press-fit ridge 54 that protrudes inward in the radial direction is integrally formed at an axially intermediate portion of the stopper rubber 52, and the inner diameter dimension of the stopper rubber 52 is determined at a site where the press-fit ridge 54 is formed. It is made smaller than the outer diameter dimension of the inner metal fitting 12. Such an upper stopper member 48 is externally attached to the upper end portion of the inner metal fitting 12, and the stopper rubber 52 is press-fitted and fixed to the inner metal fitting 12 at the portion where the press-fitting protrusion 54 is formed, thereby being fixed to the member mount 10. Has been. The upper stopper member 48 is overlapped with an inner flange-shaped portion formed at the upper end of the member member 18 at the lower end surface of the stopper rubber 52 in a state of being attached to the member mount 10.

  Then, by inserting the fixing bolt 55 from below in the axial direction into the inner hole 22 of the inner metal member 12, the inner metal member 12 is fixed to the vehicle body 17 and is press-fitted into the upper end portion in the axial direction of the inner metal member 12. The upper stopper member 48 is positioned and fixed by tightening the fixing bolt 55. Thereby, the vehicle body 17 and the member member 18 are elastically vibration-proof connected via the member mount 10. In the present embodiment, the inner peripheral resin layer 20 is formed on the inner peripheral surface of the inner metal member 12, and the inner peripheral shape of the inner metal member 12 is formed into an oval shape by the inner peripheral resin layer 20. Thus, the relative position and relative inclination between the vehicle body 17 and the member member 18 can be easily adjusted after the member mount 10 is mounted on the vehicle body 17.

  Further, in the mounted state of the member mount 10, the load sharing of the vehicle body weight is applied to the member mount 10 in the mount axis direction. Therefore, as shown in FIG. The stopper rubber 52 is brought into contact with the member member 18 and compressed in the axial direction. Thereby, the relative displacement amount in the axial direction of the inner metal member 12 and the outer cylindrical metal member 14 is buffered by the lower stopper mechanism constituted using the lower stopper metal member 28 and the upper stopper mechanism constituted using the upper stopper member 48. These stopper mechanisms constitute the axial stopper mechanism in this embodiment. In addition, as an axial direction stopper mechanism, you may be comprised only by the lower stopper mechanism implement | achieved when the lower stopper metal fitting 28 and the flange part 30 contact | abut bufferingly via the buffer rubber 42, for example.

  Next, regarding the member mount 10 according to this embodiment, a specific example of a method for manufacturing the member mount 10 will be described. In addition, this invention is not limited by this specific manufacturing method.

  First, a large-diameter cylindrical outer cylinder fitting 14 is set in a predetermined rubber molding die (not shown), and a rubber material is filled in the rubber molding die, so that a thick cylindrical cylinder is formed on the inner peripheral side of the outer cylinder fitting 14. While the main rubber elastic body 16 is vulcanized and molded, a press-fitted rubber 32 having a predetermined shape is simultaneously molded on the outer peripheral side of the outer cylinder fitting 14. As a result, an integrally vulcanized molded product 40 of the main rubber elastic body 16 provided with the outer cylinder fitting 14 is obtained. In the main rubber elastic body 16 in the present embodiment, an engaging groove 36 extending in the circumferential direction is formed in the axially intermediate portion so as to open on the inner circumferential surface. Moreover, the engagement ditch | groove 36 is formed with the depth dimension of the grade which can remove the main body rubber elastic body 16 from a shaping | molding die.

  Moreover, the cylindrical inner metal fitting 12 formed separately from the integrally vulcanized molded product 40 of the main rubber elastic body 16 is prepared, and the inner metal fitting 12 prepared in a predetermined resin molding die (not shown) is set, A synthetic resin material that is a material of the inner peripheral resin layer 20 and the outer peripheral resin protrusion 26 is filled in a resin mold. Thus, the inner peripheral resin layer 20 is formed on the inner peripheral surface of the inner metal member 12, and the outer peripheral resin protrusion 26 is formed on the outer peripheral surface of the inner metal member 12. Further, by making the inner peripheral shape of the inner peripheral resin layer 20 into an oval shape, an inner hole 22 extending in the axial direction with a substantially constant oval cross section is formed in the radially central portion of the inner metal fitting 12. The synthetic resin material is filled in the inner peripheral side and the outer peripheral side of the inner metal member 12 through the circular hole 19 formed in the inner metal member 12, and the inner peripheral resin layer 20 and the outer peripheral resin protrusion 26 are circular. It is integrally formed through the hole 19. Further, the outer diameter dimension of the inner metal fitting 12 is larger than the inner diameter dimension of the main rubber elastic body 16, and the outer diameter dimension of the outer peripheral resin protrusion 26 formed on the inner metal fitting 12 is the engagement concave groove 36. It is made larger than the internal-diameter dimension of the main rubber elastic body 16 at the formation site.

  Further, a disc-shaped lower stopper fitting 28 is superposed on the lower end portion of the inner fitting 12 on the same central axis and fixed by welding.

  Then, the inner fitting 12 integrally provided with the lower stopper fitting 28 is press-fitted in the axial direction from below in the axial direction into the center hole 34 of the main rubber elastic body 16 in the integrally vulcanized molded product 40. By such press-fitting, the inner metal fitting 12 is fixed to the main rubber elastic body 16, and the inner metal fitting 12 is positioned coaxially with the outer cylinder metal fitting 14, and is arranged at a predetermined distance in the radial direction. Thereby, the inner metal fitting 12 and the outer cylinder metal fitting 14 are elastically connected by the main body rubber elastic body 16, and the member mount 10 which concerns on this embodiment is comprised.

  Here, the inner metal fitting 12 is press-fitted into the center hole 34 of the main rubber elastic body 16 by making the outer diameter of the inner metal fitting 12 larger than the inner diameter of the main rubber elastic body 16. Thus, radial pre-compression is exerted on the main rubber elastic body 16 between the opposing surfaces of the inner metal member 12 and the outer tube member 14.

  The lower stopper fitting 28 fixed to the inner fitting 12 is positioned below the main rubber elastic body 16 when the inner fitting 12 is press-fitted into the main rubber elastic body 16, and is positioned below the main rubber elastic body 16. Are spaced apart by a predetermined distance. Further, the upper end portion of the inner metal fitting 12 is protruded upward in the axial direction from the upper end of the main rubber elastic body 16. Further, the outer peripheral resin protrusion 26 formed on the inner metal fitting 12 is formed in a shape corresponding to the engagement concave groove 36 formed in the main rubber elastic body 16, and is aligned in the axial direction. The outer peripheral resin protrusion 26 is fitted into and engaged with the engaging groove 36 by press-fitting and fixing the inner metal member 12 to the main rubber elastic body 16.

  In the member mount 10 having the structure according to the present embodiment as described above, the main rubber elastic body 16 is formed as an integrally vulcanized molded product 40 including the outer cylindrical metal fitting 14, and the inner metal fitting 12 is elastic main rubber. While being formed separately from the body 16, the outer diameter of the inner metal fitting 12 is set larger than the inner diameter of the main rubber elastic body 16. As a result, the main rubber elastic body 16 is compressed and deformed in the direction perpendicular to the axis between the opposing surfaces of the peripheral wall portion of the inner metal fitting 12 and the peripheral wall portion of the outer tube metal fitting 14 by press-fitting the inner metal fitting 12 into the main rubber elastic body 16. It is like that. Therefore, effective pre-compression can be exerted on the main rubber elastic body 16 without subjecting the outer cylindrical metal member 14 to a diameter reduction process such as an eight-way drawing, which is exerted on the main rubber elastic body 16. It is possible to reduce the tensile stress and improve the durability.

  In addition, since the pre-compression of the main rubber elastic body 16 is realized without reducing the diameter of the outer tubular fitting 14, it is possible to avoid the press-fitted rubber 32 from being damaged or deformed by drawing or the like with respect to the outer tubular fitting 14. I can do it. Therefore, the dimensional error of the press-fitting hole 46 in the member member 18 can be stably absorbed by the elastic deformation of the press-fitted rubber 32, and can be assembled with a high degree of correspondence to the dimensional error of the press-fitting hole 46. is there.

  Further, since the inner metal fitting 12 is assembled to the main rubber elastic body 16 by press fitting, when the member mount 10 is discarded due to deterioration of the main rubber elastic body 16, the inner metal fitting 12 is removed from the main rubber elastic body 16. Can be easily separated, and the inner metal fitting 12 can be reused.

  Furthermore, in this embodiment, since the lower stopper fitting 28 is fixed to the inner fitting 12, the lower stopper fitting 28 and the inner fitting 12 can be separated from the main rubber elastic body 16 when the mount is discarded. Thus, the reuse of the lower stopper fitting 28 can be realized.

  Further, in the present embodiment, an outer peripheral resin protrusion 26 protruding outward from the outer peripheral surface of the inner metal fitting 12 in the direction perpendicular to the axis is formed, and the inner peripheral surface of the main rubber elastic body 16 is An engaging groove 36 extending in the direction is formed. The outer peripheral resin protrusion 26 and the engaging groove 36 are engaged with each other by press-fitting the inner metal member 12 into the main rubber elastic body 16. According to this, it is possible to advantageously obtain a resistance against the axial disconnection between the inner metal member 12 and the main rubber elastic body 16 by the engagement of the outer peripheral resin protrusion 26 and the engaging groove 36. Therefore, the load bearing performance can be improved.

  Further, in the present embodiment, an inner peripheral resin layer 20 is formed on the inner peripheral surface of the inner metal fitting 12, and an oval inner hole extending on the central axis of the inner metal fitting 12 by the inner peripheral resin layer 20. 22 is formed. According to this, after the inner fitting 12 is fixed to the vehicle body 17 by the fixing bolt 55 inserted through the inner hole 22, the mounting position is finely adjusted in the major axis direction of the inner hole 22 in the direction perpendicular to the axis, or the inclination is tilted. Can be corrected. Moreover, in the present embodiment, the outer peripheral resin protrusion 26 and the inner peripheral resin layer 20 are integrally formed of a synthetic resin material, and are formed on the inner peripheral surface and the outer peripheral surface of the inner metal member 12, respectively. Therefore, the outer peripheral resin protrusion 26 and the inner peripheral resin layer 20 can be easily formed as compared with the case where they are formed separately. Further, an inner peripheral resin layer 20 formed on the inner peripheral surface of the inner metal fitting 12 and an outer peripheral resin protrusion 26 formed on the outer peripheral surface of the inner metal fitting 12 are integrally formed through a circular hole 19 formed in the inner metal fitting 12. As a result, it is possible to avoid peeling of the inner peripheral resin layer 20 and the outer peripheral resin protrusion 26 from the inner fitting 12, and it is possible to improve reliability and load resistance.

  Further, in the present embodiment, the shock absorbing rubber 42 integrally formed with the main rubber elastic body 16 is in contact with the lower stopper fitting 28 in the axial direction in a state in which a vehicle weight sharing load is exerted on the member mount 10. The stopper rubber 52 in the upper stopper member 48 is in contact with the inner flange-shaped portion at the upper end of the member member 18 to constitute a stopper mechanism. Thereby, excessive relative displacement in the axial direction of the inner metal member 12 and the outer cylindrical metal member 14 is prevented by these stopper mechanisms, and the main rubber elastic body 16 is excessively elastically deformed to be broken or deteriorated. Can be advantageously prevented. Therefore, the durability of the main rubber elastic body 16 can be stably improved.

  As mentioned above, although one Embodiment of this invention has been described, this is an illustration to the last, Comprising: This invention is not limited at all by the specific description in this Embodiment.

  For example, the shape of the main rubber elastic body is not limited in any way by the specific description in the above embodiment, and the inner diameter dimension only needs to be set sufficiently smaller than the outer dimension of the inner metal fitting. Specifically, for example, as shown in FIG. 6, it is possible to employ a main rubber elastic body 56 in which the engagement groove 36 is not formed on the inner peripheral surface. Accordingly, the member mount according to the present invention can be realized by the main rubber elastic body 56 having a simpler structure. Further, when such a main rubber elastic body 56 is employed, the outer peripheral resin protrusion need not be formed on the inner metal fitting. Therefore, the structure on the inner metal fitting side can be simplified. In this case, it is desirable that the center hole of the inner fitting extends with an oval cross section. In addition, about the member thru | or site | part substantially the same as the said embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol in a figure.

  Further, as shown in FIG. 6, the upper stopper member is not limited to the structure shown in the embodiment. For example, the upper stopper member 58 shown in FIG. 6 has a generally donut shape as a whole, and has a structure in which a stopper rubber 62 protrudes upward in the axial direction from an annular plate-shaped stopper substrate 60. is doing. The stopper substrate 60 is entirely covered with a rubber layer integrally formed with the stopper rubber 62. The upper stopper member 58 is extrapolated to the upper portion of the inner metal member 12 and overlapped with the upper end portion of the member member 18. The stopper rubber 62 in the upper stopper member 58 is pressed against a member on the vehicle body 17 side in a state where a shared load of the vehicle body weight is applied, so that the inner metal member 12 is attached to the outer tube metal member 14. The amount of relative displacement downward in the axial direction is limited. The upper stopper member 48 may be externally inserted so as to have a gap in the direction perpendicular to the axis with respect to the inner metal member 12. However, in order to advantageously realize positioning in the direction perpendicular to the axis, the upper stopper member 48 It is desirable that the inner peripheral surface of 48 is in contact with the outer peripheral surface of the inner metal member 12, and more preferably, the upper stopper member 48 is press-fitted into the inner metal member 12.

  Further, the engaging protrusion is not limited in any way by the outer peripheral resin protrusion 26 specifically shown in the embodiment. Specifically, for example, it does not have to be formed so as to extend over the entire circumference, and includes a plurality of engaging protrusions that are respectively formed to protrude at a plurality of locations where the circular holes 19 are formed. May be. Needless to say, the formation position and number of the circular holes 19 are not limited by the description of the embodiment. Further, the engaging protrusion may be formed of a material other than the synthetic resin material. For example, the engaging protrusion is formed of metal and has an annular shape, and is fitted and fixed to the inner metal fitting. It may be. Furthermore, the engagement protrusion may be configured by expanding the diameter of the inner metal fitting so that the inner metal piece bulges outward in the direction perpendicular to the axial direction at the axially intermediate portion of the inner metal fitting.

  In the above embodiment, the lower stopper fitting 28 is fixed to the lower end of the inner fitting 12 by welding. However, the lower stopper fitting 28 is fixed to the inner fitting 12 by any means. Also good. Specifically, for example, the lower stopper fitting 28 separated from the inner fitting 12 is overlapped with the lower end of the inner fitting 12 in the axial direction, and the fixing bolt 55 for attaching the inner fitting 12 to the vehicle body 17 is used. The lower stopper fitting 28 and the inner fitting 12 may be fixed. Further, the lower stopper fitting 28 is not essential and may not have a stopper mechanism.

  In the above embodiment, the inner metal fitting 12 is press-fitted into the main rubber elastic body 16 from below in the axial direction. However, the inner metal fitting 12 is press-fitted in from the upper axial direction of the main rubber elastic body 16. You may come to be. In this case, an upper stopper fitting which is substantially the same structure as the lower stopper fitting 28 shown in the embodiment and is turned upside down is fixed to the upper end surface of the inner fitting 12 and is elastic to the main body. A structure in which a buffer rubber that is integrally formed with the body 16 and protrudes upward in the axial direction is preferably employed.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, and the like are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is a longitudinal cross-sectional view which shows the mounting state with respect to the vehicle of the member mount as one Embodiment of this invention, Comprising: The II sectional view taken on the line in FIG. The II-II sectional view taken on the line of the member mount in FIG. The III-III sectional view taken on the line of FIG. 2 of the member mount. The longitudinal cross-sectional view of the integral vulcanization molded product which comprises the member mount. It is a longitudinal cross-sectional view which shows the mounting state to the member member of the member mount, Comprising: The VV sectional view taken on the line in FIG. The longitudinal cross-sectional view which shows the member mount as another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Member mount, 12 Inner metal fitting, 14 Outer cylinder metal fitting, 16 Main body rubber elastic body, 17 Vehicle body, 18 Member member, 20 Inner circumference resin layer, 22 Inner hole, 26 Outer circumference resin protrusion, 28 Lower stopper metal fitting, 30 Flange part , 32 Press-fit rubber, 34 Center hole, 36 Engagement groove, 40 Integrated vulcanized molded product, 42 Buffer rubber, 46 Press-fit hole

Claims (5)

The inner cylinder member and the outer cylinder member that are spaced apart from each other in the radial direction are connected by a thick-walled cylindrical rubber elastic body, the inner cylinder member is fixed to the vehicle body, and the outer cylinder member is mounted on the member member In the vehicular member mount that is vibration-proof supported by the vehicle body by being press-fitted and fixed in the hole,
The main rubber elastic body is formed of an integrally vulcanized molded product having the outer cylinder member vulcanized and bonded to the outer peripheral surface thereof, and an outer peripheral rubber is fixedly formed on the outer peripheral surface of the outer cylinder member. A member is formed separately from the main rubber elastic body, and is press-fitted into the central hole of the main rubber elastic body and assembled. The outer diameter of the inner cylinder member is made larger than the inner diameter of the central hole of the main rubber elastic body. A vehicular member mount which is enlarged and exerts radial pre-compression on the rubber elastic body by press-fitting the inner cylinder member.   The outer cylinder member is integrally formed with a flange portion that extends radially outward at an axial end located on the rear side in the press-fitting direction of the member member into the mounting hole, and the flange portion extends axially from the flange portion. While a shock-absorbing rubber protruding outward is formed, the inner cylindrical member spreads radially outward at an axial end located on the rear side in the press-fitting direction into the central hole of the main rubber elastic body. A stopper member is fixed, and the stopper member of the inner cylinder member is abutted against the flange portion of the outer cylinder member in the axial direction via the buffer rubber to constitute an axial stopper mechanism. The vehicle member mount according to claim 1.   An engagement protrusion is formed on the axially intermediate portion of the inner cylinder member so as to protrude on the outer peripheral surface, while an engagement recess is formed on the inner peripheral surface of the axially intermediate portion of the main rubber elastic body. 3. The vehicle member according to claim 1, wherein the engagement protrusion is fitted into and engaged with the engagement recess while the inner cylinder member is press-fitted into the main rubber elastic body. mount.   The inner cylinder member is formed of a cylindrical metal fitting, and a synthetic resin material is formed on both the outer peripheral surface and the inner peripheral surface of the cylindrical metal fitting, and the outer peripheral surface of the cylindrical metal fitting is formed by the synthetic resin material. The vehicle member mount according to claim 3, wherein the engaging projection is formed on the inner peripheral surface of the cylindrical metal fitting, and an inner hole having an oval cross section is formed on the inner peripheral surface of the cylindrical metal fitting. The inner cylinder member and the outer cylinder member that are spaced apart from each other in the radial direction are connected by a thick-walled cylindrical rubber elastic body, the inner cylinder member is fixed to the vehicle body, and the outer cylinder member is mounted on the member member A method of manufacturing a vehicle member mount in which the member member is vibration-proofed and supported by the vehicle body by being press-fitted into a hole,
The main rubber elastic body is formed as an integrally vulcanized molded product having the outer cylinder member vulcanized and bonded to the outer peripheral surface thereof, and at the same time, the outer rubber is molded and vulcanized and bonded to the outer peripheral surface of the outer cylindrical member. Molding process;
The inner cylinder member formed separately from the integrally vulcanized molded product having an outer diameter larger than the inner diameter of the central hole of the main rubber elastic body in the integrally vulcanized molded product obtained in the rubber molding step. A preparation process;
A step of exerting a radial pre-compression on the main rubber elastic body by pressing and assembling the inner cylinder member in the axial direction with respect to a central hole of the main rubber elastic body in the integrally vulcanized molded product; A method for manufacturing a member mount for a vehicle.

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