JP2017155754A - Vibration-proof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration-proof device having a new structure i which improvement of assembling workability of a main body rubber elastic body in respect to an outer member can also be attained while a sufficient deformation rigidity is realized at the outer member in its light weight.SOLUTION: A die molded upper member 34 constituting an outer member 14 comprises a portal part 38 connecting upper ends of leg parts 40, 40 with a beam part 42, a connecting wall part 56 covering one opening of the portal part 38 connects the lower ends of the leg parts 40, 40 to each other and in turn a press-worked product lower member 36 constituting the outer member 14 is arranged over the lower ends of the leg parts 40, 40, the lower member 36 comprises a bottom lid part 66 opposing against the beam part 42 in a vertical direction and at the same time a protruding part 77 protruded from the bottom lid part 66 upwardly covers the other opening of the portal part 38 and faces against a connecting wall part 56, a lower end part 84 of a main body rubber elastic body 16 arranged between the beam part 42 and the bottom lid part 66 is held under no adhesion in an area 80 enclosed by the leg parts 40, 40, the connecting wall part 56 and the protruding part 77.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a vibration isolator that is interposed between members constituting a vibration transmission system, and relates to a vibration isolator in which a main rubber elastic body is attached to an outer member in a non-adhesive manner.

  2. Description of the Related Art Conventionally, a vibration isolator is known as a type of anti-vibration support member that is interposed between members constituting a vibration transmission system and that mutually anti-vibrates and connects the components of the vibration transmission system. As disclosed in International Publication No. 2015/092731 (Patent Document 1), the vibration isolator is an inner member attached to one member constituting the vibration transmission system and the other member constituting the vibration transmission system. The outer member attached to the body is elastically connected by the main rubber elastic body.

  By the way, in the vibration isolator disclosed in Patent Document 1, the main body of the outer member has a gate shape that integrally includes a pair of leg portions extending vertically and a beam portion that interconnects the upper end portions of the leg portions. In addition, the pair of leg portions are connected to each other at the openings on both sides of the gate-shaped portion, and the lower portion of the main body of the outer member is cylindrical. Then, the member such as the main rubber elastic body is attached to the outer member by covering the lower opening of the main body of the outer member with the cover in a state where the main rubber elastic body or the like is inserted into the main body of the outer member. It is like that.

  However, when the main body of the outer member is cylindrical as in the vibration isolator of Patent Document 1, the weight of the outer member may be increased. In particular, in Patent Document 1, since the main body of the outer member is a thick member formed by molding, weight tends to be a problem. Further, since the lower part of the main body of the outer member is formed into a cylindrical shape, there is a problem that it is difficult to perform work when inserting and attaching a member such as a main rubber elastic body to the main body of the outer member.

  In addition, with the member such as the main rubber elastic body inserted in the main body of the outer member, the cover is slid in the direction perpendicular to the insertion direction of the main rubber elastic body to the main body of the outer member, and the main body is assembled. A member such as a rubber elastic body is attached to the outer member. Therefore, when the cover is assembled to the main body of the outer member, members such as the main rubber elastic body may come out of the main body of the outer member.

International Publication No. 2015/092731

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is a combination of a main rubber elastic body and the like for the outer member while realizing sufficient load resistance with a lightweight structure in the outer member. An object of the present invention is to provide a vibration isolator having a novel structure that can improve the attaching workability.

  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.

  That is, in the first aspect of the present invention, the inner member attached to one member constituting the vibration transmission system and the outer member attached to the other member are elastically connected to each other by the main rubber elastic body, In the vibration isolator in which the outer member is attached to the main rubber elastic body in a non-adhesive manner, the outer member includes an upper member made of a molded product and a lower member made of a pressed product of a plate material, The upper member includes a gate-shaped portion in which upper ends of a pair of leg portions that are vertically opposed to each other are connected to each other by a beam portion, and the lower ends of the pair of leg portions are provided with the gate-shaped portion. A connecting wall portion that covers the one opening of the pair and connects the pair of legs to each other is integrally formed, and the lower member is attached across the lower ends of the pair of legs, Lower member is the upper A bottom cover portion that is vertically opposed to the beam portion of the material, and a protrusion portion that protrudes upward is integrally formed on the bottom cover portion, and the protrusion portion of the lower member is the upper member Covering the other opening of the gate-shaped portion of the upper member and facing the connecting wall portion of the upper member, and the body rubber between the beam portion of the upper member and the bottom lid portion of the lower member An elastic body is provided, and a lower end portion of the main rubber elastic body is held non-adhered in a region surrounded by the pair of leg portions, the connecting wall portion, and the protruding portion. .

  According to the vibration isolator having the structure according to the first aspect as described above, the outer member is configured to include the upper member of the molded product and the lower member of the press-processed product, and the lower member is the upper member of the upper member. A region having a protrusion covering the other opening of the gate-shaped portion and holding the lower end portion of the main rubber elastic body in the outer member in a non-adhesive manner is a pair of leg portions and a connecting wall portion of the upper member, and a lower member And is formed to be surrounded by the protruding portion. Therefore, compared to the case where the region holding the main rubber elastic body is formed by being surrounded by the upper member of the molded product over the entire circumference, a part of the wall portion in the circumferential direction is a lightweight press. By forming the lower member, which is a product, the outer member can be reduced in weight.

  Further, the lower ends of the pair of leg portions are connected to each other by a connecting wall portion that covers one opening of the gate-shaped portion, so that the pair of leg portions are connected to each other on both sides of the upper end portion and the lower end portion. Therefore, the deformation rigidity of the upper member is improved. As described above, since the deformation rigidity of the upper member can be increased, the load resistance of the stopper configured by the contact between the inner member and the upper member can be improved.

  Furthermore, since the upper member has a shape that opens not only on the lower side but also on the other opening side of the gate-shaped portion, the member such as the main rubber elastic body is connected to the pair of leg portions and the connecting wall portion of the upper member. Can be easily inserted and disposed in the region surrounded by. Moreover, it is possible to assemble the lower member close to the upper member from the lower side where the upper member opens and the other opening side of the gate-shaped part, and the main rubber elastic body is disposed between the upper member and the lower member. The work to do becomes easy.

  According to a second aspect of the present invention, in the vibration isolator described in the first aspect, the inner member is inserted into one opening of the portal portion, and the inner member and the connection wall portion are in contact with each other. A bounce stopper is configured by contact.

  According to the second aspect, the portion of the outer member that contacts the inner member and constitutes the bound stopper (the connecting wall portion) is constituted by the upper member of the molded product that easily obtains large deformation rigidity. The load resistance of the stopper is easily obtained, and the durability is improved. Furthermore, a bounce stopper having excellent load resistance can be easily obtained by inserting the inner member into one opening of the gate-shaped portion above the connecting wall portion.

  According to a third aspect of the present invention, in the vibration isolator described in the second aspect, an upper end portion of the connection wall portion facing the inner member inserted into one opening of the portal portion is, A contact protrusion protruding in the opening direction of the portal portion is integrally formed.

  According to the third aspect, the contact protrusion of the bound stopper can be obtained in a large area by providing the contact protrusion on the upper end portion of the connecting wall portion that is opposed to the inner member in the vertical direction. The pressure acting on the gas can be reduced.

  According to a fourth aspect of the present invention, in the vibration isolator described in any one of the first to third aspects, the upper end portion of the upper member is a restriction wall that covers the other opening of the portal portion. The part is integrally formed.

  According to the 4th aspect, the further improvement of the deformation rigidity of an upper member is achieved by providing the control wall part which covers the other opening of a portal part. Furthermore, the stopper which restrict | limits the relative displacement amount of an inner member and an outer member is comprised because an inner member and a control wall part mutually contact | abut in the opening direction of a portal part.

  According to a fifth aspect of the present invention, in the vibration isolator described in any one of the first to fourth aspects, the lower ends of the pair of leg portions are inwardly facing the pair of leg portions. A holding protrusion that protrudes toward is provided.

  According to the fifth aspect, the holding projections are provided on the pair of leg portions, so that the distance between the opposing surfaces of the pair of leg portions and the size of the main rubber elastic body in the same direction are independent of each other. It can also be set. Accordingly, the distance between the opposing surfaces of the pair of leg portions is set according to the mounting structure with respect to the constituent members of the vibration transmission system, the characteristics of the stopper constituted by the contact between the pair of leg portions and the inner member, the clearance, and the like. The spring characteristics of the main rubber elastic body can be set to a high level according to the required performance.

  According to a sixth aspect of the present invention, in the vibration isolator described in any one of the first to fifth aspects, the protrusion is provided at an end of the bottom lid, and the bottom lid An attachment portion that is attached to the other member constituting the vibration transmission system is integrally formed at an end portion of the portion opposite to the protruding portion.

  According to the 6th aspect, the arrangement | positioning area | region of the main body rubber elastic body in an outer member can be enlarged by providing a protrusion part in the edge part of a bottom cover part. In addition, since the portion covering the lower end of the main rubber elastic body on one opening side of the portal portion is formed by the connecting wall portion of the upper member, it is opposite to the end portion where the protruding portion is provided in the bottom lid portion. The end of the side is not limited in shape in order to hold the main rubber elastic body, and it is possible to provide an attachment portion having an attachment structure for the constituent members of the vibration transmission system.

  According to a seventh aspect of the present invention, in the vibration isolator described in any one of the first to sixth aspects, the inner member is provided with a mounting recess that opens downward, and The inner member is attached to the main rubber elastic body in a non-adhesive manner by inserting the upper end portion of the main rubber elastic body vertically into the mounting recess.

  According to the seventh aspect, the inner member can be easily attached to the main rubber elastic body in a non-adhering manner by inserting the upper end portion of the main rubber elastic body into the mounting recess formed in the inner member. Can do. Further, in the case of a structure in which the inner member is inserted through the opening of the portal portion, the position of the main rubber elastic body inserted from below the portal portion with respect to the inner member inserted through the opening of the portal portion. It is necessary to insert the upper end of the rubber elastic body into the mounting recess of the inner member, but in the upper member before the lower member is assembled, the other opening is opened in addition to the lower part of the portal part. Therefore, the operation of aligning the relative positions of the main rubber elastic body and the inner member can be easily performed.

  According to the present invention, the outer member is configured to include an upper member made of a molded product and a lower member made of a press-processed product, and the portion surrounding and holding the lower end portion of the main rubber elastic body includes an upper member. It is comprised by a pair of leg part and connecting wall part of a member, and the protrusion part of a lower member. Therefore, the outer member can be reduced in weight as compared with the case where the outer member surrounds and holds the main rubber elastic body by the upper member over the entire circumference. Further, since the lower end portions of the pair of leg portions are connected to each other by the connecting wall portion in the upper member, the deformation rigidity of the upper member is sufficiently ensured, for example, by the contact between the inner member and the upper member. The load-bearing performance of the stopper is improved. Furthermore, since the upper member has a shape that is opened not only to the lower side but also to the other opening side of the gate-shaped portion before the lower member is assembled, the member such as the main rubber elastic body is attached to the upper member. In the region surrounded by the pair of leg portions and the connecting wall portion.

The perspective view which shows the engine mount as 1st embodiment of this invention. The perspective view which shows the engine mount of FIG. 1 from another angle. The perspective view which shows the engine mount of FIG. 1 from another angle. The top view of the engine mount shown in FIG. The front view of the engine mount shown in FIG. The right view of the engine mount shown in FIG. VII-VII sectional drawing of FIG. VIII-VIII sectional drawing of FIG. The disassembled perspective view of the engine mount shown in FIG. The perspective view of the inner member which comprises the engine mount shown in FIG. The top view of the inner member shown in FIG. FIG. 11 is a bottom view of the inner member shown in FIG. 10. The perspective view of the upper member which comprises the engine mount shown in FIG. The perspective view which shows the upper member of FIG. 13 at another angle. The front view of the upper member shown in FIG. FIG. 14 is a bottom view of the upper member shown in FIG. 13. XVII-XVII sectional drawing of FIG. The perspective view of the lower member which comprises the engine mount shown in FIG. The top view of the lower member shown in FIG. The front view of the lower member shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 8 show an automotive engine mount 10 as a first embodiment of a vibration isolator having a structure according to the present invention. As shown in FIG. 9, the engine mount 10 has a structure in which an inner member 12 and an outer member 14 are elastically connected to each other by a main rubber elastic body 16. In the following description, the vertical direction means the vertical direction in FIG. 5 in principle. Further, unless otherwise specified, the front-rear direction refers to the left-right direction in FIG. 6, and the left-right direction refers to the left-right direction in FIG.

  The inner member 12 is a high-rigidity member formed of a metal such as iron or aluminum alloy, a fiber-reinforced synthetic resin, or the like, and as shown in FIGS. The fitting portion 18 fitted to the main rubber elastic body 16 and the fastening portion 20 attached to the power unit 90 described later are integrally provided.

  The fitting portion 18 of the inner member 12 is formed into a thick plate shape, and as shown in FIG. 12, a mounting recess 22 that opens downward is formed. The mounting recess 22 has a shape corresponding to the upper end portion of the main rubber elastic body 16 described later.

  Further, in the present embodiment, a separate buffer rubber 24 is attached to the fitting portion 18 of the inner member 12 in a non-adhesive manner. As shown in FIGS. 7 to 9, the cushion rubber 24 has a substantially rectangular box shape that opens forward as a whole, and includes a plurality of protrusions 26 that protrude upward and extend forward and backward. Buffer projections 28, 28 projecting outward from each one are provided. The shock-absorbing protrusion 28 has a cross-sectional shape in which the vertical dimension gradually decreases toward the protruding tip, and the base end portion in the protruding direction has a groove that opens toward both the upper and lower sides and continues in the front-rear direction. It is formed and has a constriction partially narrowed vertically. Further, an insertion hole 30 is formed in the lower wall portion of the cushioning rubber 24 so as to penetrate vertically with a cross-sectional shape corresponding to the mounting recess 22 of the inner member 12. Then, when the fitting portion 18 of the inner member 12 is inserted from the opening on the front side with respect to the shock absorbing rubber 24, the shock absorbing rubber 24 is externally attached to the fitting portion 18, and the surface of the fitting portion 18 is The mounting recess 22 is covered with a buffer rubber 24 over substantially the entire opening. Note that the mounting recess 22 of the fitting portion 18 opens downward through the insertion hole 30 of the shock absorbing rubber 24.

  The fastening portion 20 of the inner member 12 is integrally formed in front of the fitting portion 18 and extends to both the left and right sides of the fitting portion 18, and a bolt hole 32 penetrating vertically at the front end portion and the left and right end portions. Are formed respectively.

  As shown in FIGS. 1 to 9, the outer member 14 includes an upper member 34 and a lower member 36. The upper member 34 is a high-rigidity member formed of a metal such as iron or aluminum alloy or a fiber-reinforced synthetic resin in which glass fibers are mixed in polyamide, and is a thick-walled member formed by die molding such as die casting. It is a molded product.

  Moreover, the upper member 34 is provided with the portal part 38, as shown to FIGS. The portal portion 38 includes a pair of leg portions 40, 40 extending vertically and a beam portion 42 that connects the upper ends of the leg portions 40, 40 to each other.

  The leg portion 40 of the gate-shaped portion 38 is formed into a thick substantially plate shape having a predetermined width in the front and rear and extending up and down, and the pair of leg portions 40 and 40 have a predetermined distance from each other in the left-right direction. Oppositely arranged apart. Further, the leg portion 40 is integrally provided with an upper fastening piece 44 projecting outward in the left and right sides at the lower end portion, and the upper fastening piece 44 has a temporary fastening projection 46 projecting downward (see FIGS. 15 and 16). ) And a bolt hole 48 penetrating vertically.

  Further, the pair of leg portions 40 are integrally formed with holding projections 50 that project inward in the opposing direction. The holding projection 50 is continuously provided in the lower part of the leg 40 over substantially the entire length of the leg 40 in the front-rear direction, and the left and right inner surfaces, which are protruding tip surfaces, face the holding projections 50 and 50. It is a plane extending in the front-rear direction and the vertical direction substantially perpendicular to the direction. In the present embodiment, a hollow recess 52 that opens to the lower surface is formed with respect to the upper fastening piece 44 and the holding protrusion 50 that are continuously provided, and the holding protrusion 50 is formed as a hollow recess 52. Thus, the shape protrudes inward and leftward and rightward and extends downward from the protruding tip.

  The beam portion 42 of the gate-shaped portion 38 is formed into a thick, substantially plate shape having a predetermined width in the front and rear and extending in the left and right directions, and is integrally formed at the upper ends of the pair of leg portions 40 and 40. The upper end portions of the pair of leg portions 40 are connected to each other by a beam portion 42. The pair of leg portions 40 and 40 and the beam portion 42 are provided with reinforcing wall bodies 54 that project outward at both the front and rear end portions and the front and rear intermediate portions as shown in FIGS. Therefore, the deformation rigidity of the pair of leg portions 40 and 40 and the beam portion 42 is improved.

  Moreover, the upper member 34 is provided with the connection wall part 56 integral with the gate-shaped part 38, as shown in FIG. The connecting wall portion 56 is formed in a thick plate shape that extends in the left and right directions with a predetermined width, and both left and right end portions are connected to the front surfaces of the lower end portions of the pair of leg portions 40 and 40, and the gate-shaped portion 38. The lower part of the front opening (one opening) is covered with the connecting wall part 56. Further, the vertical width of the connecting wall portion 56 is made smaller than the vertical height of the front opening of the gate-shaped portion 38, and the connecting wall portion 56 is positioned downward with respect to the beam portion 42. A window portion 58 is formed between the portion 56 and the beam portion 42.

  Furthermore, an abutting protrusion 60 is integrally formed on the upper end portion of the connecting wall portion 56. The contact protrusion 60 protrudes forward from the left and right center portion of the connection wall portion 56, and the upper surface of the contact protrusion 60 and the upper surface of the connection wall portion 56 spread on substantially the same plane. In the present embodiment, the reinforcing rib 62 that connects the lower surface of the contact protrusion 60 and the outer surface of the connecting wall portion 56 is formed, and the deformation rigidity of the contact protrusion 60 is enhanced.

  In addition, a restriction wall portion 64 is integrally formed on the upper end portion of the pair of leg portions 40, 40 and the beam portion 42. The restriction wall portion 64 is provided so as to cover the upper part of the rear opening (the other opening) of the gate-shaped portion 38, the left and right end portions are integrally connected to the pair of leg portions 40, 40, and the upper end portion. Is integrally connected to the beam portion 42. The vertical dimension of the restriction wall portion 64 is made smaller than the vertical dimension of the rear opening of the gate-shaped portion 38, and the restriction wall portion 64 is provided at the upper portion without reaching the lower ends of the pair of leg portions 40, 40. Thus, in a temporarily fixed state of the upper member 34 and the lower member 36 described later, the regulation wall portion 64 of the upper member 34 is separated upward from a protruding portion 77 (described later) of the lower member 36.

  On the other hand, as shown in FIGS. 18 to 20, the lower member 36 of the outer member 14 is a pressed product formed by pressing a metal plate material such as iron or aluminum alloy, and the upper member 34. It is said to be thinner and lighter than.

  The lower member 36 is disposed across the lower end portions of the pair of leg portions 40, 40 in the upper member 34, and includes a bottom lid portion 66 that vertically opposes the beam portion 42 of the upper member 34, and a bottom lid. Lower fastening pieces 68 and 68 projecting outward on the left and right sides of the portion 66 are integrally provided. The bottom cover portion 66 has a substantially flat plate shape, and is superimposed on the lower surface of the main rubber elastic body 16 to be described later, as shown in FIGS. As shown in FIGS. 18 to 20, the lower fastening piece 68 has a substantially flat plate shape, and is formed with a temporary fastening hole 70 penetrating vertically and a bolt hole 72 penetrating vertically. The lower fastening piece 68 of the present embodiment is improved in deformation rigidity by the front end portion being curved downward.

  Further, an attachment portion 74 is formed integrally with the bottom lid portion 66. The attachment portion 74 of the present embodiment is formed to extend downward from the front end portion of the bottom lid portion 66, and bolt holes 76 penetrating in the front-rear direction are formed at both left and right end portions. In addition, the bending part rigidity of the attaching part 74 is improved by bending the upper and lower intermediate parts into a stepped shape.

  Furthermore, a projecting portion 77 is integrally formed with the bottom lid portion 66. The protruding portion 77 is integrally formed so as to protrude upward from the rear end portion of the bottom lid portion 66 by pressing. Further, as shown in FIG. 8 and the like, the upper portion of the projecting portion 77 is curved in the thickness direction, the projecting tip surface of the projecting portion 77 is directed rearward, and the front end edge 78 of the projecting portion 77 is It is located behind the front surface of the base end portion of the protruding portion 77. In the present embodiment, as shown in FIG. 19, left and right cuts 79 and 79 are formed at the rear end portion of the bottom cover portion 66, and a protrusion 77 is formed between the left and right of the cuts 79 and 79. The left and right ends of the protruding portion 77 are separated from the bottom lid portion 66.

  And the upper member 34 and the lower member 36 are piled up and down, and are positioned mutually, The outer member 14 is comprised. That is, the lower fastening pieces 68, 68 of the lower member 36 are overlapped with the legs 40, 40 of the upper member 34 from below, and the temporary fastening protrusions 46, 46 projecting from the upper fastening pieces 44, 44 are the lower fastening pieces. The upper member 34 and the lower member 36 are temporarily fixed in a state where the upper member 34 and the lower member 36 are positioned relative to each other by being fitted into the temporary fastening holes 70 and 70 formed in the 68 and 68. As a result, the lower member 36 is disposed across the pair of leg portions 40, 40 so as to cover the lower portion of the gate-shaped portion 38 of the upper member 34, and the bottom cover portion 66 of the lower member 36 is disposed on the upper member 34. It is arranged so as to face the beam portion 42 in the vertical direction.

  Here, the protruding portion 77 of the lower member 36 protruding upward from the bottom lid portion 66 protrudes into the rear opening of the gate-shaped portion 38 of the upper member 34, and the rear opening (the other opening) of the gate-shaped portion 38. Is disposed so as to cover the lower portion of the upper member 34 and is opposed to the connecting wall portion 56 of the upper member 34 in the front-rear direction. Thereby, between the beam part 42 of the upper member 34 and the bottom cover part 66 of the lower member 36, the connecting wall part 56 of the upper member 34 and the holding protrusions 50, 50 of the pair of leg parts 40, 40 are provided. And the fitting area | region 80 enclosed over the perimeter by the protrusion part 77 of the lower member 36 is formed. The fitting region 80 of the present embodiment is a substantially rectangular space in the vertical direction corresponding to the lower end portion of the main rubber elastic body 16 to be described later, but the shape and size of the fitting region 80 is the main rubber elasticity. The shape can be appropriately changed according to the shape of the lower end portion of the body 16.

  The temporary fixing structure of the upper member 34 and the lower member 36 is not particularly limited. For example, the temporary fastening corresponding to the temporary fastening hole 70 of the lower fastening piece 68 with respect to the upper fastening piece 44 of the upper member 34. It is also possible to form holes and temporarily fix them with temporary fastening bolts inserted through the fastening holes. Further, for example, the temporary fastening protrusion 46 is made smaller in diameter than the temporary fastening hole 70 and the diameter of the tip of the temporary fastening protrusion 46 inserted into the temporary fastening hole 70 is increased by caulking, etc. It can be temporarily fixed by stopping. Furthermore, a temporary fastening protrusion that protrudes upward is formed on the lower fastening piece 68 of the lower member 36, and a temporary fastening hole that opens downward is formed on the upper fastening piece 44 of the upper member 34 to form a lower The upper member 34 and the lower member 36 can be temporarily fixed by press-fitting or inserting and locking the temporary fastening protrusions of the member 36 into the temporary fastening holes of the upper member 34. However, the temporary fixing structure is not necessarily limited to that provided in the upper fastening piece 44 of the upper member 34 and the lower fastening piece 68 of the lower member 36, and may be provided in other parts. Further, in the present embodiment, the upper member 34 and the lower member 36 are permanently fixed by mounting the outer member 14 to a vehicle body 92 (described later), but in a single state before being mounted on the vehicle. The upper member 34 and the lower member 36 may be permanently fixed.

  As shown in FIGS. 7 and 8, the main rubber elastic body 16 has a substantially rectangular frustum shape in which the upper and lower middle portions gradually decrease in the cross section toward the upper side, and the upper end portion has a substantially constant outer shape. The inner fitting portion 82 extends in the vertical direction, and the outer fitting portion 84 has a lower end portion extending upward and downward with a substantially constant outer shape larger than the inner fitting portion 82. Further, a plurality of spring adjustment holes 86 penetrating in the front-rear direction are formed through the middle portion of the main rubber elastic body 16, and the spring characteristics of the upper, lower, left, right, and front-back of the main rubber elastic body 16 are determined by the spring adjustment holes 86. Has been adjusted by. Although the spring adjustment hole 86 of this embodiment penetrates back and forth, the spring characteristic adjustment structure of the main rubber elastic body 16 is not necessarily limited to the through hole, and is a recess that opens on either front or back surface. The spring characteristics can also be adjusted. Furthermore, an air vent groove 88 is formed in the outer fitting portion 84 of the main rubber elastic body 16. The air vent groove 88 is a groove that continuously opens on the front and rear end surfaces and the lower surface of the outer fitting portion 84, and both ends are connected to one of the spring adjustment holes 86.

  An inner member 12 and an outer member 14 are attached to the main rubber elastic body 16 without being bonded, and the inner member 12 and the outer member 14 are elastically connected to each other by the main rubber elastic body 16.

  That is, the inner fitting portion 82 that constitutes the upper end portion of the main rubber elastic body 16 is inserted from below into the mounting recess 22 formed in the inner member 12, so that the inner member 12 is in the main rubber elastic body 16. It is attached to the upper end of the non-adhesive. In this embodiment, the mounting recess 22 is made smaller in the front and rear and left and right than the inner fitting portion 82 of the main rubber elastic body 16, and the inner member 12 is not bonded to the inner fitting portion 82 of the main rubber elastic body 16. However, the inner member 12 may be bonded to the main rubber elastic body 16.

  On the other hand, the lower member 36 and the upper member 34 of the outer member 14 are attached to the outer fitting portion 84 constituting the lower end portion of the main rubber elastic body 16. That is, the main rubber elastic body 16 is inserted from below between the opposing surfaces of the pair of leg portions 40, 40 in the upper member 34, and the outer fitting portion 84 is provided on the pair of leg portions 40, 40. The inner fitting portion 82 is positioned above the holding projections 50 and 50 and the connecting wall portion 56 while being fitted between the portions 50 and 50.

  Furthermore, the outer member 14 is attached to the main rubber elastic body 16 by temporarily fixing the lower member 36 to the upper member 34. That is, when the lower member 36 is temporarily fixed to the upper member 34, the lower surface of the outer fitting portion 84 of the main rubber elastic body 16 is covered by the bottom lid portion 66 of the lower member 36, and the outer fitting portion. The rear surface of 84 is covered by the protrusion 77 of the lower member 36. As a result, the main rubber elastic body 16 is disposed between the beam portion 42 of the upper member 34 and the bottom cover portion 66 of the lower member 36 so as to face each other, and the main rubber elastic body 16 is prevented from coming out downward from the upper member 34. While being prevented by the bottom lid portion 66, the outer fitting portion 84 of the main rubber elastic body 16 is surrounded by the pair of leg portions 40 and 40 of the upper member 34 and the connecting wall portion 56 and the protruding portion 77 of the lower member 36. The fitting region 80 is held non-adhered.

  In the present embodiment, as shown in FIG. 8, the projecting tip portion of the projecting portion 77 of the lower member 36 is curved backward so as to move away from the main rubber elastic body 16 toward the projecting tip side. The front end edge 78 is difficult to contact the main rubber elastic body 16. Thereby, it is possible to prevent the main rubber elastic body 16 from being cracked by the contact of the front end edge 78 of the projecting portion 77, thereby improving durability and reliability.

  Further, the inner member 12 attached to the upper end portion of the main rubber elastic body 16 is inserted into a window portion 58 that constitutes a front opening of the portal portion 38 and protrudes forward from the portal portion 38. As a result, the fastening portion 20 of the inner member 12 is disposed away from the gate-shaped portion 38 forward, and the fitting portion 18 of the inner member 12 is disposed so as to face the connecting wall portion 56 of the outer member 14 upward. Has been.

  In the engine mount 10 having the structure according to the present embodiment, a portion of the outer member 14 that surrounds and holds the outer fitting portion 84 of the main rubber elastic body 16 is a pair of upper members 34 made of a molded product. It is comprised by the leg parts 40 and 40, the connection wall part 56, and the protrusion part 77 of the lower member 36 which consists of press work products. As a result, the outer member 14 has a portion that surrounds and holds the outer fitting portion 84 of the main rubber elastic body 16 in the outer member 14 as compared with the structure formed by the upper member that is molded over the entire circumference. Can be reduced in weight.

  Moreover, in the upper member 34 of the outer member 14, the lower end portions of the pair of leg portions 40, 40 are connected by the connecting wall portion 56, so that the gate-shaped portion 38 including the pair of leg portions 40, 40 is connected to the connecting wall portion. 56, the deformation rigidity of the gate-shaped portion 38 is sufficiently ensured. Therefore, it is possible to sufficiently obtain the load resistance of the upper member 34 constituting the stopper, which will be described later, by contact with the inner member 12, thereby realizing improvement in durability and stable stopper action.

  In addition, since a portion of the outer member 14 that surrounds and holds the outer fitting portion 84 of the main rubber elastic body 16 is constituted by a protruding portion 77 of the lower member 36 at a part in the circumferential direction, the lower member 36 is When the main rubber elastic body 16 is attached to the upper member 34 before being temporarily fixed, the arrangement region of the main rubber elastic body 16 in the upper member 34 is opened not only downward but also rearward. Therefore, it is easy to insert the main rubber elastic body 16 into the arrangement region of the main rubber elastic body 16 in the upper member 34, and it is easy to adjust the position of the main rubber elastic body 16 in the arrangement region. .

  In particular, in this embodiment, the inner member 12 is attached to the main rubber elastic body 16 by fitting the upper end portion (inner fitting portion 82) of the main rubber elastic body 16 into the mounting recess 22 of the inner member 12. It is necessary to align the position of the main rubber elastic body 16 inserted from below the upper member 34 with respect to the mounting recess 22 of the inner member 12 inserted from the front with respect to the window 58 of the upper member 34. Here, the lower end portion of the upper member 34 that surrounds and holds the lower end portion (outer fitting portion 84) of the main rubber elastic body 16 is opened not only downward but also rearward. The position of the inner rubber member 16 is easily adjusted, and the inner fitting portion 82 of the main rubber elastic body 16 is easily fitted into the mounting recess 22 of the inner member 12.

  The pair of leg portions 40, 40 are integrally formed with holding projections 50, 50 that project inward in the opposing direction, and the outer rubber fitting 16 is fitted between the holding projections 50, 50. A landing portion 84 is held. Accordingly, the size of the main rubber elastic body 16 in the left-right direction and the distance in the left-right direction of the portion excluding the holding projections 50, 50 in the pair of leg portions 40, 40 are not necessarily matched to each other with a predetermined degree of freedom. It is possible to set each independently. Therefore, the shape of the main rubber elastic body 16 is set according to the required spring characteristics while setting the distance between the pair of leg portions 40, 40 in consideration of the mounting position on the vehicle, the characteristics of the left and right stoppers, and the clearance. And size can be set.

  In addition, a protrusion 77 is formed at the rear end of the lower member 36, and a portion of the outer member 14 that holds the front surface of the outer fitting portion 84 of the main rubber elastic body 16 is a connecting wall portion of the upper member 34. 56, the front end portion of the lower member 36 does not need a structure for holding the outer fitting portion 84 of the main rubber elastic body 16, and is provided with a mounting structure for the vehicle body 92 described later. A portion 74 can be provided. The specific shape of the mounting portion 74 and the fastening structure with respect to the vehicle body 92 are not particularly limited, and may be appropriately changed according to the structure on the vehicle body 92 side.

  In the engine mount 10 having such a structure, as shown in FIG. 6, the inner member 12 has a bolt hole 32 of the fastening portion 20 with respect to the power unit 90 which is one member constituting the vibration transmission system. It is fixed by a bolt (not shown) inserted through the. Further, the engine mount 10 includes a bolt (not shown) in which the outer member 14 is inserted into the bolt holes 48 and 72 of the fastening pieces 44 and 68 with respect to the vehicle body 92 which is the other member constituting the vibration transmission system. It is fixed by a bolt (not shown) inserted through the bolt hole 76 of the mounting portion 74. As a result, the engine mount 10 is interposed between the power unit 90 and the vehicle body 92, and the power unit 90 and the vehicle body 92 are connected to each other in a vibration-proof manner. Further, when the engine mount 10 is mounted on the vehicle, bolts (not shown) that are inserted into the bolt holes 48 and 72 of the fastening pieces 44 and 68 of the outer member 14 are screwed into the vehicle body 92, whereby the upper member 34. And the lower member 36 are fixed to each other by bolts.

  When vibration is input between the inner member 12 and the outer member 14 in such a state where the engine mount 10 is mounted on the vehicle, the target is caused by internal friction during elastic deformation of the main rubber elastic body 16. Anti-vibration effect is demonstrated. The direction of the engine mount 10 in the mounted state with respect to the vehicle is not particularly limited. For example, the front-rear direction of the engine mount 10 may be the front-rear direction of the vehicle. May be the left-right direction of the vehicle.

  In the engine mount 10, the relative displacement amount of the inner member 12 and the outer member 14 is limited by stoppers in a plurality of directions. That is, the fitting portion 18 of the inner member 12 and the beam portion 42 of the outer member 14 abut on each other in the vertical direction, whereby a rebound stopper that restricts the amount of relative displacement of the inner member 12 relative to the outer member 14 is configured. . Further, a bound stopper that limits a downward relative displacement amount of the inner member 12 with respect to the outer member 14 is configured by the fitting portion 18 of the inner member 12 and the connecting wall portion 56 of the outer member 14 contacting in the vertical direction. The Further, the fitting portion 18 of the inner member 12 and the leg portion 40 of the outer member 14 abut on each other in the left-right direction, whereby a left-right stopper that limits the amount of relative displacement of the inner member 12 relative to the outer member 14 is configured. . Further, a rear stopper that limits the amount of relative displacement of the inner member 12 relative to the outer member 14 is configured by the fitting portion 18 of the inner member 12 and the regulating wall portion 64 of the outer member 14 coming into contact with each other in the front-rear direction. The

  As described above, the stopper in each direction is configured by the contact between the inner member 12 and the upper member 34, and the upper member 34 is made thick and highly rigid by molding, The stopper function can be stably exhibited and the durability can be improved.

  In particular, the bound stopper is configured by making good use of the connecting wall portion 56 having a function of holding the outer fitting portion 84 of the main rubber elastic body 16 and a function of increasing the deformation rigidity of the upper member 34. The desired stopper action can be obtained while preventing the weight of the member 34 from increasing and the structure from becoming complicated. In addition, a contact protrusion 60 protruding forward is integrally formed at the upper end of the connection wall portion 56 of the present embodiment, and the upper surface of the connection wall portion 56 and the upper surface of the contact protrusion 60 cooperate. Thus, since the contact surface of the bound stopper is constituted, a more excellent load bearing performance with respect to the stopper load can be exhibited.

  In the present embodiment, the shock absorbing rubber 24 is attached to the fitting portion 18 of the inner member 12, so that the fitting portion 18 of the inner member 12 and the upper member 34 of the outer member 14 are shock absorbing rubber in each stopper. 24 abuts. Thereby, the impact and the hitting sound that occur when the inner member 12 and the outer member 14 come into contact with each other are reduced, and the quietness and ride comfort of the vehicle are improved.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the lower member 36, the specific structure of the lower fastening piece 68 and the mounting portion 74 can be appropriately changed according to the structure on the vehicle body 92 side.

  Moreover, in the said embodiment, although the lower end part of the main body rubber elastic body 16 was clamped between the holding | maintenance protrusions 50 and 50 provided in a pair of leg parts 40 and 40, the holding | maintenance protrusion 50 is not essential. The pair of leg portions 40, 40 may be directly held by the opposed inner surfaces.

  Further, the lower end portion of the main rubber elastic body 16 does not necessarily have to be sandwiched by the outer member 14 in the front-rear and left-right directions, and the amount of movement in the front-rear and left-right directions relative to the outer member 14 may be limited. Specifically, for example, the lower end portion of the main rubber elastic body 16 is sandwiched between the pair of legs 40 and 40 in the left-right direction, and the lower end portion of the main rubber elastic body 16 is connected to the connecting wall portion 56 and the lower member 36. The front and rear movement amount of the main rubber elastic body 16 is limited by contact with the connecting wall portion 56 and the protruding portion 77. The main rubber elastic body 16 may be held in a predetermined position without being bonded. Furthermore, it may not be clamped by a pair of leg parts 40 and 40, and may be clamped between the connection wall part 56 and the protrusion part 77, or between a pair of leg parts 40 and 40, and a connection wall. Needless to say, it may not be sandwiched between the portion 56 and the protruding portion 77. In addition, it is desirable that the amount of movement of the lower end portion of the main rubber elastic body 16 with respect to the outer member 14 is limited to 5 mm or less within the fitting region 80.

  Moreover, in the said embodiment, although the control wall part 64 which comprises a back stopper is provided, the control wall part 64 is not essential, for example, a some vibration isolator is attached to a vehicle and other anti-vibration When the amount of backward displacement of the inner member 12 relative to the outer member 14 is limited by the stopper of the device, the restriction wall portion 64 and the rear stopper can be omitted. Further, the restriction wall portion 64 is preferably provided across the pair of leg portions 40 and 40 and the beam portion 42 as in the above-described embodiment, but for example, the pair of leg portions 40 and 40 and the beam portion. 42 may be provided so as to be connected to only one of them. Specifically, for example, the regulation wall portion 64 may be provided such that both left and right end portions are integrally formed with the pair of leg portions 40 and 40 and the upper end portion is separated downward with respect to the beam portion 42. .

  The structure for attaching the inner member to the main rubber elastic body in the above embodiment is merely an example, and can be changed as appropriate. Specifically, for example, a cylindrical fitting that opens back and forth is bonded to the upper end of the main rubber elastic body 16 by vulcanization, and a fastening fitting that corresponds to the inner member 12 of the above embodiment is provided. The inner member constituted by the fitting and the fastening fitting is inserted into the opening of the gate-shaped portion 38 of the outer member 14 and the fastening fitting is press-fitted and fixed to the fitting. It may be adapted to be attached to. Further, the inner member is not necessarily limited to a structure inserted through the window portion 58 of the outer member 14.

  The scope of application of the present invention is not limited to engine mounts, and can be applied to subframe mounts, differential mounts, and the like. Furthermore, the vibration isolator according to the present invention can be applied not only to automobiles but also to motorcycles, railway vehicles, industrial vehicles, and the like.

10: engine mount (vibration isolator), 12: inner member, 14: outer member, 16: rubber elastic body of main body, 22: mounting recess, 34: upper member, 36: lower member, 38: portal portion, 40 : Leg part, 42: beam part, 50: holding projection part, 56: connecting wall part, 60: contact projection part, 64: regulating wall part, 66: bottom cover part, 74: mounting part, 77: projecting part, 80: fitting region, 82: inner fitting part (upper end part of main rubber elastic body), 84: outer fitting part (lower end part of main rubber elastic body), 90: power unit (one of which constitutes vibration transmission system) Member), 92: vehicle body (the other member constituting the vibration transmission system)

Claims (7)

An inner member attached to one member constituting the vibration transmission system and an outer member attached to the other member are elastically connected to each other by a main rubber elastic body, and the outer member is attached to the main rubber elastic body. In the anti-vibration device attached non-adhesively,
The outer member includes an upper member made of a molded product and a lower member made of a pressed product of a plate material,
The upper member includes a gate-shaped portion in which upper ends of a pair of leg portions that are vertically opposed to each other are connected to each other by a beam portion, and the lower ends of the pair of leg portions are provided with the gate-shaped portion. A connecting wall portion that covers one opening of the portion and connects the pair of legs to each other is integrally formed,
The lower member is disposed across the lower ends of the pair of legs, and the lower member includes a bottom lid portion that vertically opposes the beam portion of the upper member, and the bottom lid portion A protrusion projecting upward is integrally formed, and the projecting part of the lower member covers the other opening of the gate-shaped part of the upper member and faces the connecting wall part of the upper member. And
The main rubber elastic body is disposed between the beam portion of the upper member and the bottom lid portion of the lower member, and the lower end portion of the main rubber elastic body is the pair of leg portions and the connecting wall. An anti-vibration device characterized in that it is held non-adhered in a region surrounded by the portion and the protruding portion.   The vibration isolator according to claim 1, wherein the inner member is inserted into one opening of the gate-shaped portion, and a bound stopper is configured by contact between the inner member and the connecting wall portion.   The contact protrusion which protrudes in the opening direction of this gate-shaped part is integrally formed in the upper end part of the said connection wall part facing the said inner member penetrated by one opening of the said gate-shaped part. 2. The vibration isolator according to 2.   The anti-vibration device according to any one of claims 1 to 3, wherein a restriction wall portion that covers the other opening of the portal portion is integrally formed at an upper end portion of the upper member.   The vibration isolator as described in any one of Claims 1-4 with which the holding | maintenance protrusion which protrudes toward the opposing direction inside of a pair of said leg part is provided in the lower end part of the said pair of leg part. .   The protrusion is provided at an end of the bottom cover, and an attachment portion attached to the other member constituting the vibration transmission system is provided at an end of the bottom cover opposite to the protrusion. The vibration isolator as described in any one of Claims 1-5 currently formed integrally.   The inner member is formed with a mounting recess that opens downward, and the upper end of the main rubber elastic body is inserted vertically into the mounting recess so that the inner member is elastic with the main body rubber. The vibration isolator as described in any one of Claims 1-6 attached to the body by non-adhesion.

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