JP6552153B2 - Vibration control device - Google Patents

Description

  The present invention relates to an antivibration device.

  For example, in order to prevent excessive deformation of the elastic body that occurs when an excessive load is input, the vibration isolator is provided with a stopper member such as a bound stopper rubber with an interval on the vehicle upper side of the outer bracket. There is an arrangement (see, for example, Patent Document 1). The stopper member described in Patent Document 1 has a bottomed cylindrical shape, and the peripheral wall of the stopper member surrounds the small-diameter cylindrical portion of the outer bracket, thereby preventing entry of foreign matter.

JP 2007-51769 A

  However, at the same time, the above-mentioned conventional stopper member requires a space for arranging the peripheral wall around the small diameter cylindrical portion of the outer bracket. For this reason, it is necessary to consider the arrangement space of the vibration control device so that the stopper member does not interfere with other parts.

  In the above-described conventional vibration damping device, when there is an input in the horizontal direction (the longitudinal direction of the vehicle), the peripheral wall of the stopper member abuts locally on the small diameter cylindrical portion of the outer bracket. There is room for improvement in gender.

  Furthermore, the peripheral wall of the stopper member abuts locally on the small diameter cylindrical portion of the outer bracket even when the input in the horizontal direction and the input in the vertical direction (vertical direction of the vehicle) are simultaneously performed on the vibration isolation device. Therefore, when the input is only from the vertical direction and the stopper member does not contact the small-diameter cylindrical portion of the outer bracket, and when the input is from both the vertical direction and the horizontal direction, the stopper member is locally applied to the small-diameter cylindrical portion of the outer bracket. In the case of abutment, the characteristics after contact with the stopper (characteristics after the stopper member comes into contact with the outer bracket by input, for example, characteristics defined by displacement-load) change. Since the characteristics after hitting the stopper may be set in advance, it is desirable that the characteristics remain unchanged regardless of the vibration input direction.

  An object of the present invention is to provide a vibration isolator capable of ensuring a wide arrangement space while suppressing intrusion of foreign matter, hardly causing a change in characteristics after hitting a stopper, and having excellent durability. is there.

The anti-vibration device according to the present invention comprises an inner member connected to one of a vibration generating portion and a vibration receiving portion, an outer cylindrical member connected to the other of the vibration generating portion and the vibration receiving portion, the inner member and the inner member The outer cylindrical member is in contact with the outer cylindrical member in a state in which the elastic member that elastically connects the outer cylindrical member and the through hole through which the projecting portion of the inner member from the outer cylindrical member penetrates is inserted through the through hole. A stopper member that can contact the stopper member, and the stopper member has an outer diameter dimension equal to or less than an outer diameter dimension of the outer cylinder member, and a stopper surface that faces the outer cylinder member. An annular inner stopper surface that annularly surrounds the through hole, and an annular outer stopper surface that is radially outward of the annular inner stopper surface and approaches the outer cylinder member from the annular inner stopper surface toward the radially outer side. Formed Together and is characterized in that is obtained by axially spaced relative to the outer cylinder member.
According to the vibration-proofing device of the present invention, the arrangement space of the vibration-proofing device can be widely secured while suppressing the intrusion of foreign matter from between the stopper member and the outer cylindrical member, and the characteristics after the stopper contact change. Can be difficult to be generated, and moreover, can be excellent in durability.

The thickness of the stopper member in a direction orthogonal to the radial direction of the stopper member is substantially equal in thickness in a region where the stopper surface facing the outer cylindrical member of the stopper member is formed. preferable.
In this case, it is possible to further suppress the change in characteristics after the stopper comes into contact.

It is preferable that the annular outer stopper surface is formed by a curved surface that curves toward the radially outer side of the stopper member.
In this case, it is possible to further suppress the change in the characteristics after the stopper contacts.

  According to the present invention, it is possible to provide a vibration isolator capable of ensuring a wide arrangement space while suppressing intrusion of foreign matter, hardly causing a change in characteristics after hitting a stopper, and having excellent durability. it can.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view shown in the state which does not mount an engine mount which is one embodiment of the vibration-proof apparatus of this invention in a vehicle. It is a longitudinal cross-sectional view which shows the state which mounts the engine mount of FIG. 1 in the vehicle, and receives the load from an engine.

  Hereinafter, an embodiment of the vibration damping device of the present invention will be described with reference to the drawings. In the following description, the upper side and the lower side of the drawing will be described as the upper side and the lower side of the vehicle, respectively. Further, in the present embodiment, the engine side member is a vibration generating portion, and the chassis (car body) side member is a vibration receiving portion.

Reference numeral 1 denotes an engine mount which is an embodiment of the vibration isolator of the present invention. Reference numeral 2 is an inner member, for example, made of metal, connected to the vibration generating unit. In the present embodiment, the upper end of the inner member 2, for example, the engine-side mount bracket B ₁ for example made of metal with a bolt is fixed. Thus, the inner member 2 is coupled to the engine via the engine side mount bracket B _1. In the present invention, as in the present embodiment, the inner member 2 is not limited to a solid shape such as a cylindrical shape having a screw hole formed at one end. For example, the inner member 2 includes a cylindrical shape.

The code | symbol 3 is a metal outer cylinder member which is connected so that it may surround so that the part 2a of the inner member 2 may be protruded, and a vibration receiving part. In the present embodiment, the outer cylinder member 3 includes an annular flat portion 3a in which an opening A is formed, an annular shoulder portion 3b connected to the outer peripheral edge of the flat portion 3a, and an outer peripheral edge of the shoulder portion 3b. And a cylindrical outer cylinder portion 3c extending with the same outer diameter toward the lower side. For example, a metal chassis-side mount bracket B ₂ is fixed to the outer cylinder portion 3 c by, for example, welding. Thus, the outer cylinder member 3 is connected to the chassis or the like via the chassis-side mounting bracket B _2.

In this embodiment, the outer cylinder member 3 was formed on the flat portion 3a vibration input side surface f ₁ is formed by an annular plane. In the present embodiment, the vertical cross-sectional shape of the shoulder portion 3b is a curved surface having a radius of curvature having a center on the inner side of the outer cylindrical member 3, as shown in FIG. 1, and is a curved surface that curves toward the outer side in the radial direction.

  Reference numeral 4 denotes an intermediate cylindrical member fixed inside the outer cylindrical member 3 by, for example, press fitting. The intermediate cylinder member 4 and the outer cylinder member 3 constitute an engine mount case. In the engine mount 1 of the present embodiment, the vibration proof performance is enhanced by filling the engine mount case with a liquid.

  Reference numeral 5 is an elastic body made of rubber, for example, which is disposed between the inner member 2 and the outer cylinder member 3 and elastically connects the inner member 2 and the outer cylinder member 3. In the present embodiment, the axis of the inner member 2 is configured to be the same axis as the axis O of the outer cylinder member 3. As shown in FIG. 1, the elastic body 5 is in contact with the back surface of the flat portion 3 a of the outer cylinder member 3 so as to be separable, and the inner side of the outer cylinder portion 3 c of the outer cylinder member 3 via the intermediate cylinder member 4. It is elastically connected to the circumferential surface.

In the present embodiment, an opening is formed in the intermediate cylindrical member 4 and the opening is closed by a partition 6 made of an elastic material. Also the intermediate tubular member 4, the partition walls 7 which partitions the inner space of the engine mount case and the secondary liquid chamber S ₂ of the outer tube member 3 side main fluid chamber S ₁ and the partition 6 side. The partition wall 7, with annular restricted passage 9 which communicates the main liquid chamber S ₁ and the auxiliary liquid chamber S ₂ in order to attenuate low-frequency vibrations is formed, increase in the dynamic spring constant at the time of high-frequency vibrations input In order to suppress this, a movable plate 10 connected to the partition wall 6 is disposed.

  The code | symbol 8 is a stopper member which has the through-hole 8a which one part (protrusion part) 2a of the inner member 2 penetrates, and can contact | abut with the outer cylinder member 3. As shown in FIG. In the present embodiment, the stopper member 8 is press-fitted into the inner member 2 and is movable in the rotational direction and the vertical direction. Here, the rotation direction means a direction around the axis of the inner member 2 (in the present embodiment, coaxial with the axis O).

  In the present embodiment, the outer diameter dimension of the stopper member 8 is the same as the outer diameter dimension of the outer cylindrical member 3. That is, the stopper member 8 is defined such that the outermost peripheral surface of the stopper member 8 coincides with the outermost peripheral surface of the outer cylindrical member 3 in the radial direction. More specifically, in the present embodiment, the outer diameter dimension defined by the outer peripheral surface 8b of the stopper member 8 and the outer diameter dimension defined by the outer peripheral surface of the outer cylindrical portion 3c of the outer cylindrical member 3 are the same. It is the outside diameter size L. Thereby, when mounting the engine mount 1 on a chassis or the like, the necessity of considering the arrangement space of the engine mount 1 is reduced so that the stopper member 8 does not interfere with other parts around the outer cylinder member 3.

Further, the stopper member 8 includes a flat annular inner stopper surface F _{1 in} which a stopper surface F facing the outer cylinder member 3 annularly surrounds the through hole 8a from the through hole 8a, and a diameter of the annular inner stopper surface F ₁ . in outward, it is formed in the annular outer stopper surface F ₂ of approaching the outer cylinder member 3 toward the annular inner stop face F ₁ radially outward of the stopper member 8. The outer edge of the annular outer stopper surface F ₂ is the outer edge of the stopper surface of the stopper member 8 (hereinafter, referred to as "stop surface outer edge of the stopper member 8 ') constituting the 8e. Thus, if the stopper surface side outer edge 8e of the stopper member 8 is brought close to the outer cylinder member 3, the vibration input side surface f ₁ formed on the annular inner stopper surface F ₁ and the flat portion 3a of the outer cylinder member 3 and while the spacing is sufficiently secured, between the vibration input side surfaces f ₁ formed on the flat portion 3a of the stop surface side edge 8e and the outer cylinder member 3 of the stopper member 8, to narrow the distance between the axis O direction Can.

In addition, in this embodiment, the stopper member 8 is separated from the outer cylinder member 3 in the direction of the axis O. That is, the stopper member 8 does not overlap the outer cylinder member 3 at any position in the axis O direction. More specifically, as shown in FIG. 2, even when the engine mount 1 is mounted on a vehicle and the engine mount 1 supports the engine with respect to a chassis or the like, as shown in FIG. in the axial O direction, between the vibration input side surfaces f ₁ formed on the flat portion 3a of the outer cylinder member 3 to form a narrow gap C _1.

In the present invention, because it is shaped to approach the outer cylinder member 3 according annular outer stopper surface F ₂ of the stopper member 8 is directed radially outwardly, annular inner stop face F ₁ and the outside of the stopper member 8 is formed between the vibration input side surfaces f ₁ of the cylindrical member 3, while ensuring the axial line O direction of the gap C _2, the vibration input side surfaces f ₁ formed on the flat portion 3a of the outer cylinder member 3 and the stopper it can be narrowed axis O direction of the clearance C ₁ which is formed between the stopper surface side edge 8e of the member 8. Thereby, the outer diameter dimension of the stopper member 8 is equal to or smaller than the outer diameter dimension of the outer cylinder member 3, and the outer cylinder member 3 and the stopper member 8 are separated in the direction of the axis O, foreign matter can be prevented from entering from the clearance C _1. Also, even when excessive vibration from the engine side is input to the inner member 2, etc., the stopper surface F of the stopper member 8 is at least in contact with the vibration input side surface f ₁ of the outer cylindrical member 3 as in the conventional case. By contacting, the stopper function can be exhibited.

The size (interval) of the gap C ₁ can be set as appropriate, but is preferably set to, for example, 1 to 2 mm in order to sufficiently suppress the intrusion of foreign matter and to sufficiently exhibit the stopper function. Specifically, for example, it is 1.5 mm.

  In addition, since the conventional bottomed cylindrical stopper member has a peripheral wall that surrounds the outer cylindrical portion 3c of the outer cylindrical member 3, if there is an input in the horizontal direction (vehicle front-rear left-right direction), the peripheral wall of the stopper member Since there is room for improvement in the durability of the stopper member because it abuts locally with respect to the outer cylinder portion 3c, the engine mount 1 of the present embodiment, as shown in FIG. Since there is no peripheral wall surrounding the outer cylindrical portion 3c, the stopper member 8 does not locally contact the outer cylindrical portion 3c of the outer cylindrical member 3 regardless of the direction of input, and the durability of the stopper member Improve.

  Further, in the engine mount having the conventional stopper member, when the input in the vertical direction (vehicle up-down direction) and the input in the horizontal direction are simultaneous, the input is only from the vertical direction, and the input is in the vertical direction and the horizontal direction. In both cases, the characteristics after contact with the stopper (characteristics after the stopper member abuts the outer bracket by the input. For example, displacement-characteristics specified by load) may change, but In the engine mount 1 of the embodiment, as shown in FIG. 2 and the like, the stopper member 8 does not have a peripheral wall or the like that comes into contact with the outer cylinder portion 3c of the outer cylinder member 3, so that the input is only in the vertical direction. In the case of both vertical and horizontal directions, there is no significant change in the characteristics per stopper. For this reason, the engine mount 1 of the present embodiment is effective when the characteristics after contact with the stopper are set in advance.

  As described above, the engine mount 1 of the present embodiment can secure a wide arrangement space while suppressing the intrusion of foreign matter, hardly changes in the characteristics after hitting the stopper, and is excellent in durability.

In particular, as shown in FIG. 2 etc., the stopper member 8 according to the present embodiment has a thickness D in a direction (in the present embodiment, the same direction as the axis O) orthogonal to the radial direction of the stopper member 8 In the region where at least the stopper surface F facing the outer cylindrical member 3 is formed, the thickness is defined to be substantially equal throughout the radial direction. Here, the “region in which the stopper surface F facing the outer cylinder member 3 is formed” means, for example, a region excluding a region facing the opening A of the outer cylinder member 3 in the region of the stopper surface F, that is, This means a region where the stopper member 8 can contact the outer cylinder member 3. Further, “substantially equal thickness” means that there is a case where there is a thickness non-uniformity of about 10%. In this case, even if the stopper surface F of the stopper member 8 abuts against the vibration input side surface f _{1 of the} outer cylinder member 3 in any area, the stopper member 8 abuts the outer cylinder member 3 with a uniform thickness. Thus, it is possible to further suppress the change in characteristics after the stopper comes into contact.

Furthermore, in this embodiment, as shown in FIG. 2, the annular outer stopper surface F ₂ is a curved line such as an arc having a radius of curvature r whose longitudinal cross-sectional shape is centered on the stopper surface F side, and as it goes outward in the radial direction. It is a curved curved surface. In this case, when the stopper member 8 abuts on the outer cylindrical member 3, the portion of the annular outer stopper surface F ₂ is flexibly deformed without coming into contact with one another, thereby further suppressing the change in characteristics after the stopper comes into contact be able to. The shape of the annular outer stopper surface F ₂ is preferably a curved surface as described above, is not limited to a curved surface. For example, the annular outer stopper surface F ₂ may be a flat inclined surface having a vertical cross-sectional shape that is a straight line.

  In the present invention, the outer diameter of the stopper member 8 can be set to be equal to or smaller than the outer diameter of the outer cylinder member 3. However, in order to fully exhibit the characteristics after stopper contact when the stopper surface F of the stopper member 8 abuts against the outer cylinder member 3, the outer diameter of the stopper member 8 is set to the outer cylinder as in this embodiment. It is preferable to ensure a large contact area with the flat portion 3a of the outer cylindrical member 3 by making the outer diameter of the outer cylindrical portion 3c of the member 3 the same.

  The above descriptions describe exemplary embodiments of the present invention, and various modifications can be made without departing from the scope of the claims. For example, in the present embodiment, the engine side is the vibration generating side and the chassis side is the vibration receiving side, but by mounting the vehicle side in the opposite direction to the vehicle to the present embodiment, the inner member with the chassis side as the vibration generating portion While connecting the two, the outer cylinder member 3 can also be connected with the engine side as a vibration receiving portion. In addition to the engine mount, the vibration isolator of the present invention can be used, for example, to support the automatic transmission on the vehicle body.

  Further, not only the internal structure of the engine mount 1 but also whether it is a liquid-filled type for enhancing the vibration isolation performance is not limited to this embodiment.

  The present invention uses an elastic body to connect an inner member connected to one of the vibration generating portion and the vibration receiving portion with an outer cylinder member connected to the other of the vibration generating portion and the vibration receiving portion, and the outer cylinder in the inner member The present invention can be applied to various anti-vibration devices as long as the anti-vibration device is capable of making the stopper member penetrate through the protruding portion from the member and making contact with the outer cylinder member.

1 Engine mount (anti-vibration device)
2 inner member 2a part of the inner member (protruding part)
DESCRIPTION OF SYMBOLS 3 Outer cylinder member 3a Flat part 3b Shoulder part 3c Outer cylinder part 4 Intermediate cylinder member 5 Elastic body 6 Partition 7 Partition wall 8 Stopper member 8a Through-hole 8b Outer peripheral surface 8e Stopper side outer edge (outer edge on the stopper side)
B ₁ Engine side mounting bracket B ₂ Chassis side mounting bracket C ₁ , C ₂ gap D Thickness f ₁ Vibration input side surface F Stopper surface F ₁ Annular inner stopper surface F ₂ Annular outer stopper surface L Outer diameter r Curvature radius

Claims (3)

The inner member connected to one of the vibration generating portion and the vibration receiving portion, the outer cylindrical member connected to the other of the vibration generating portion and the vibration receiving portion, and the inner member and the outer cylindrical member elastically. An elastic body to be connected, and a stopper member capable of coming into contact with the outer cylinder member in a state of having a through hole through which a projecting portion from the outer cylinder member in the inner member penetrates and is inserted through the through hole. ,
The stopper member is
The outer diameter dimension of the stopper member is equal to or less than the outer diameter dimension of the outer cylinder member,
A stopper surface facing the outer cylinder member is an annular inner stopper surface that annularly surrounds the through-hole, and a radially outer side of the annular inner stopper surface, and the outer cylinder is directed radially outward from the annular inner stopper surface. Formed with an annular outer stop surface approaching the member;
The outer edge of the annular outer stopper surface of the stopper member is spaced apart in the axial direction with respect to the outer cylinder member ,
The anti-vibration device according to any one of the present invention , wherein any position in the axial direction is not overlapped with the outer cylinder member .   The stopper member according to claim 1, wherein the stopper member has substantially the same thickness in a region in which a stopper surface having a thickness in a direction orthogonal to the radial direction of the stopper member facing the outer cylindrical member of the stopper member is formed. Vibration isolation device.   The anti-vibration device according to claim 1, wherein the annular outer stopper surface is formed by a curved surface that curves toward the radially outer side of the stopper member.

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