JP2011220396A - Dynamic damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dynamic damper simplifying fixation to an object to be fixed.SOLUTION: Under the dynamic damper 100 being disposed in one side of a connection member 4, providing a flange 23 with a tension from the other side of the member 4 draws the flange 23 to the other side, while passing it through an opening 4a such that it is disposed in the other side of the member 4. Thereby, the flange 23 is retained to the other side of the member 4 and a base 21 is retained to the one side of the member 4 as to allow the dynamic damper 100 to be equipped on a torque rod 1, so that the fixation can be simplified.

Description

  The present invention relates to a dynamic damper, and more particularly, to a dynamic damper that can simplify an attaching operation to an attachment object.

  Conventionally, in an automobile, for example, an engine mount and a torque rod are interposed between the engine and the vehicle body to reduce transmission of engine vibration to the vehicle body. In addition, a dynamic damper may be attached to the engine mount or torque rod in order to suppress vibration of the engine mount or torque rod at a specific frequency.

  The dynamic damper includes a mass member as a mass body, a plate-shaped attachment plate, and a rubber-like elastic body that couples the mass member and the attachment plate. The mass member is elastically supported by the object to be attached through the rubber-like elastic body by attaching the attachment plate to the object to be attached, and the mass member resonates to absorb the vibration energy of the object to be attached.

  Here, as a structure for attaching a dynamic damper to an attachment, Patent Document 1 discloses a structure in which a fixing plate 10b (attachment plate) is riveted to a rod body 101 (attachment), and a rod body 1 (attachment). And a structure in which an engagement piece 8a (mounting plate) is fixed by caulking (Patent Document 1).

WO2002 / 042662 (for example, FIG. 2, FIG. 14 etc.)

  However, in the structure that is attached by riveting like the conventional dynamic damper described above, a process of driving a rivet using a rivet driving machine is required, so that the work of attaching to the attachment becomes complicated. there were. In addition, since the number of parts increases as rivets are required, there is a problem that the parts cost increases. On the other hand, with the structure that is fixed by caulking, the cost of parts can be reduced by the amount of rivets that are not required, but a process of bending the mounting plate using a press machine is required, so that the work to attach to the object to be mounted is also performed. There was a problem that became complicated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a dynamic damper capable of simplifying the attaching operation to an attachment object.

Means for Solving the Problems and Effects of the Invention

  According to the dynamic damper of claim 1, the mass member as a mass body and the vibration isolation member connected to the mass member and configured by a rubber-like elastic body are provided, and the vibration isolation member is provided on one surface side of the mass member. A base portion that is fixed to the base portion, a neck portion that is connected to the base portion and has an outer shape smaller than the base portion, and a flange portion that is connected to the neck portion and has an outer shape larger than the neck portion. Therefore, for a plate-shaped object having an opening smaller than at least the base part and the flange part, the neck part is opened by passing the opening from one surface side of the object to be mounted and passing it to the other surface side. The base portion or the flange portion is disposed on one surface side or the other surface side of the attachment object. Accordingly, the flange portion is locked to the other surface side of the attachment object, and the base portion is locked to the one surface side of the attachment object, so that the dynamic damper is attached to the attachment object. . In this way, by fitting the flange portion of the vibration isolating member into the opening of the attached object, the attachment to the attached object can be performed, and the mounting plate is riveted to the attached object as in the conventional product. Since there is no need to perform work or work for caulking and fixing the mounting plate to the attachment object, there is an effect that the mounting work can be simplified correspondingly. Further, since the mounting plate can be made unnecessary, there is an effect that the part cost can be reduced and the weight of the product can be reduced.

  In this case, since the vibration isolating member has the object to be attached disposed between the base portion and the flange part, when the mass member is displaced away from the object to be attached, the flange part is attached. By being locked to the other surface side of the object, it is possible to maintain a state in which the mass member is elastically supported by the mounted object via the vibration isolation member. On the other hand, when the mass member is displaced in the direction approaching the attachment object, the base member is locked to one surface side of the attachment object, so that the mass member is attached to the attachment object via the vibration isolation member. Can be maintained in an elastically supported state. Therefore, when the object to be mounted vibrates at a specific frequency, the vibration energy of the object to be mounted can be alternatively absorbed by the resonance of the mass member in the direction of approaching or separating from the object to be mounted.

  Further, since the vibration isolating member has the neck portion inserted through the opening of the attachment object, when the mass member is displaced in a direction perpendicular to the plate thickness direction of the attachment object, the neck portion is the inner periphery of the opening. By being locked to the surface, it is possible to maintain a state in which the mass member is elastically supported by the attachment object via the vibration isolation member. Therefore, when the attachment object vibrates at a specific frequency, the mass member can resonate and vibrate in a direction perpendicular to the plate thickness direction of the attachment object, so that vibration energy of the attachment object can be absorbed and absorbed.

  According to the dynamic damper of the second aspect, in addition to the effect achieved by the dynamic damper of the first aspect, the dimension between the base portion and the flange portion is set to be smaller than the plate thickness dimension of the attachment. Therefore, when an object to be mounted is disposed between the base portion and the flange portion, the base portion and the flange portion are spread apart in a direction away from each other, and the neck portion is elastically pulled and deformed. Due to the elastic recovery force, the base portion and the flange portion are pressed against the object to be mounted and elastically compressed and deformed. Therefore, when the mass member is displaced in the direction of approaching or separating from the object to be attached, if the amount of displacement of the object to be attached is smaller than the compression amount of the base part and the flange part, the base part or the flange part is removed from the object to be attached. Can be separated. Accordingly, it is possible to prevent the base portion or the flange portion from colliding with the one surface side or the other surface side of the attachment object and generating noise after the base portion or the flange portion is separated from the one surface side or the other surface side of the attachment object. There is an effect.

  According to the dynamic damper of the third aspect, in addition to the effect produced by the dynamic damper according to the first or second aspect, the neck portion has at least a width dimension in the first direction, and the first direction of the inner peripheral surface of the opening. Therefore, when the neck is inserted through the opening, the neck is pressed against the inner peripheral surface of the opening and is elastically compressed and deformed at least in the first direction. Therefore, when the attachment object is displaced in the first direction, if the displacement amount of the attachment object is smaller than the compression amount of the neck part, it is possible to avoid the separation of the neck part from the attachment object. Therefore, there is an effect that it is possible to prevent the neck from colliding with the opening inner peripheral surface of the attachment object and generating noise after the neck portion is separated from the opening inner peripheral surface of the attachment object.

  According to a fourth aspect of the present invention, in addition to the effect achieved by the dynamic damper according to any one of the first to third aspects, the vibration damping member is erected from the flange portion toward the opposite side of the neck portion and arranged radially. Since it has a plate-like portion formed from a plurality of plate-like bodies and a handle portion formed at the standing tip of the plate-like portion and having an outer shape smaller than the flange portion, the handle portion is attached By pulling to the other surface side of the object, the pulling force to the handle portion is transmitted to the flange portion via the plate-shaped portion, and the flange portion can be drawn from the opening to the other surface side of the mounted object. In this case, the handle portion has a smaller outer shape than the flange portion and is easier to pass through the opening than the flange portion. Therefore, pulling the flange portion while pulling the handle portion improves workability when mounting the dynamic damper. There is an effect that can be.

  In addition, as the connection area between the plate-like portion and the flange portion is larger, the pulling force to the handle portion can be transmitted to a wide area of the flange portion, but the amount of the rubber-like elastic body used is increased and the material cost is increased. On the other hand, by arranging the plurality of plate-like bodies forming the plate-like portion radially, the pulling force on the handle portion is efficiently applied to the flange portion while suppressing the amount of rubber-like elastic body used. I can tell you. That is, if the usage amount of the rubber-like elastic body is the same, the portion where the plate-like portion and the flange portion are connected is the flange portion as compared with the case where the plate-like portion is formed in a columnar shape or a cone shape. Therefore, the load points acting on the flange portion from the handle portion through the plate-like portion can be dispersed. Therefore, it is possible to transmit the pulling force to the handle portion to a wide area of the flange portion while suppressing the material cost, and as a result, it is possible to easily pull the flange portion from the opening to the other surface side of the attachment object. There is.

It is a top view of the torque rod with which the dynamic damper in 1st Embodiment of this invention was mounted | worn. It is a bottom view of the torque rod with which the dynamic damper was mounted | worn. It is a top view of a torque rod. It is sectional drawing of the torque rod in the VI-VI line of FIG. (A) is a front view of a dynamic damper, (b) is sectional drawing of the dynamic damper in the Vb-Vb line | wire of Fig.5 (a). (A) is a side view of the dynamic damper, (b) is a sectional view of the dynamic damper taken along the line VIb-VIb of FIG. 6 (a), and (c) is a bottom view of the dynamic damper, (D) is sectional drawing of the dynamic damper in the VId-VId line | wire of Fig.6 (a). (A) is sectional drawing of the dynamic damper in the VIIa-VIIa line | wire of Fig.6 (a), (b) is sectional drawing of the dynamic damper in the VIIa-VIIa line | wire of Fig.6 (a). (A) is a front view of the dynamic damper in 2nd Embodiment, (b) is a side view of a dynamic damper, (c) is a front view of a dynamic damper. (A) is a front view of the dynamic damper in 3rd Embodiment, (b) is a side view of a dynamic damper, (c) is a front view of a dynamic damper. (A) is a front view of the dynamic damper in 4th Embodiment, (b) is sectional drawing of the dynamic damper in the Xb-Xb line | wire of Fig.10 (a). (A) is sectional drawing of the dynamic damper in 5th Embodiment, FIG.11 (b) is sectional drawing of the dynamic damper in 6th Embodiment, (c) is 7th Embodiment. It is sectional drawing of the dynamic damper in. (A) is sectional drawing of the dynamic damper in 8th Embodiment, (b) is sectional drawing of the dynamic damper in 9th Embodiment, (c) is dynamic in 10th Embodiment. It is sectional drawing of a damper, (d) is sectional drawing of the dynamic damper in 11th Embodiment. (A) is sectional drawing of the dynamic damper in 12th Embodiment, (b) is sectional drawing of a dynamic damper, (c) is sectional drawing of a dynamic damper. It is sectional drawing of the dynamic damper in 13th Embodiment. (A) is a front view of the dynamic damper in 14th Embodiment, (b) is sectional drawing of the dynamic damper in the XVb-XVb line | wire of Fig.15 (a).

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the schematic configuration of the torque rod 1 to which the dynamic damper 100 according to the first embodiment of the present invention is attached will be described with reference to FIGS. FIG. 1 is a top view of a torque rod 1 to which a dynamic damper 100 is attached according to a first embodiment of the present invention. FIG. 2 is a bottom view of the torque rod 1 to which the dynamic damper 100 is attached. FIG. 3 is a top view of the torque rod 1. 4 is a cross-sectional view of the torque rod 1 taken along line VI-VI in FIG. In FIGS. 3 and 4, the first inner cylinder 2a, the first vibration isolation base 2c, the second inner cylinder 3a, and the second vibration isolation base 3c are not shown in order to simplify the drawings and make the description easy to understand. is doing.

  As shown in FIGS. 1 and 2, the torque rod 1 is a vibration isolator for restricting displacement in the roll direction of the engine during acceleration by receiving torque from the engine. The first bush 2 attached to the right side of FIG. 2 (not shown), the second bush 3 attached to the vehicle body side (the left side of FIG. 1 and the left side of FIG. 2, not shown), the first bush 2 and the second bush. 3 and a connecting member 4 that connects the three to each other, and a dynamic damper 100 is mounted on the connecting member 4. Thereby, it is comprised so that the displacement to the roll direction of an engine at the time of acceleration and the displacement of the front-back direction can be controlled.

  The first bush 2 is provided between a first inner cylinder 2a attached to the engine side, a first outer cylinder 2b positioned on the outer peripheral side of the first inner cylinder 2a, and the first inner cylinder 2a and the second outer cylinder 2b. And a first anti-vibration base 2c formed of a rubber-like elastic body.

  The first inner cylinder 2a is formed of an aluminum alloy in a cylindrical shape, and is fastened and fixed to the engine side by a bolt through an insertion hole formed in the center. The first outer cylinder 2b is formed of a steel material in a cylindrical shape, is configured integrally with the connecting member 4, and is positioned at a predetermined interval from the first inner cylinder 2a. The first vibration isolation base 2c connects the first inner cylinder 2a and the first outer cylinder 2b over the front circumference in the circumferential direction.

  The second bush 3 includes a second inner cylinder 3a attached to the vehicle body side, a second outer cylinder 3b positioned on the outer peripheral side of the second inner cylinder 3a, and the second inner cylinder 3a and the second outer cylinder 3b. And a second anti-vibration base 3c that is formed of a rubber-like elastic body.

  The second inner cylinder 3a is made of an aluminum alloy into a columnar body having a triangular shape in a top view, and is fastened and fixed to the vehicle body side with a bolt through an insertion hole drilled in the center. The second outer cylinder 3b is made of a steel material, is integrally formed with the connecting member 4, and is located at a predetermined interval from the second inner cylinder 3a. The second anti-vibration base 3c is configured as a pair of rubber legs that are configured to expand in the shape of a letter C when viewed from above and connect the second inner cylinder 3a and the second outer cylinder 3b at two locations.

  As shown in FIGS. 3 and 4, the connecting member 4 is formed in a plate shape, and the first outer cylinder 2 b and the second outer cylinder 3 b are welded and fixed at both ends, and is drilled in the plate thickness direction. An opening 4a is provided. The opening 4a is a part for mounting the dynamic damper 100, and is formed in a substantially rectangular shape when viewed from above. In addition, the connecting member 4 is press-formed in a state where a pair of metal plates made of a steel material are overlapped, so that the pair of metal plates are integrally formed.

  Next, a detailed configuration of the dynamic damper 100 will be described with reference to FIGS. 5 and 6. 5A is a front view of the dynamic damper 100, and FIG. 5B is a cross-sectional view of the dynamic damper 100 taken along the line Vb-Vb in FIG. 5A. 6A is a side view of the dynamic damper 100, FIG. 6B is a cross-sectional view of the dynamic damper 100 taken along the line VIb-VIb of FIG. 6A, and FIG. FIG. 6D is a bottom view of the dynamic damper 100, and FIG. 6D is a cross-sectional view of the dynamic damper 100 taken along the line VId-VId in FIG.

  As shown in FIGS. 5 (a) and 5 (b), the dynamic damper 100 is a vibration isolator for suppressing the torque rod 1 (see FIG. 1) from vibrating at a specific frequency. The mass member 10 and the vibration isolating member 20 that elastically supports the mass member 10 on the torque rod 1 are provided.

  The mass member 10 is a rectangular parallelepiped member made of a steel material, and the outer surface is covered with a rubber-like elastic body. Further, the mass member 10 is formed in an outer shape larger than the opening 4a (see FIG. 3) when viewed from below (downward in FIG. 5A). Further, the mass member 10 is formed with a protruding portion 11 that protrudes from one side (the lower side in FIG. 5B). The protruding portion 11 is a rectangular parallelepiped portion made of the same steel material as that of the mass member 10. The protruding portion 11 protrudes to a position where a neck portion 22 and a flange portion 23, which will be described later, are connected, and an opening 4 a (see FIG. 3). ) Is smaller than the outer shape.

  In addition, the “outer shape” described in claim 1 means a shape that appears on the front of the object when viewed from the outside. In particular, in the present embodiment, the dynamic damper 100 It means a shape that appears on the front in a cross section perpendicular to the height direction (the vertical direction in FIG. 5A). Therefore, the outer shape of the object is larger (smaller) than the outer shape of the comparison object. In the above-described cross section, the cross-sectional area of the shape that appears on the front of the object is not the shape that appears on the front of the comparison object. It means larger (smaller) than the area. That is, for example, when the object or the comparison object has a cylindrical shape and the above-described cross section has an annular shape, a circle outside the ring corresponding to the shape appearing on the front surface of the object or the comparison object (that is, The cross-sectional area of the circle corresponding to the cylindrical outer peripheral surface is compared. In addition, even when the shape that appears on the front of the object or the comparison object is not similar, the outer shape is determined based on the size of the cross-sectional area in the above-described cross section.

  For example, the mass member 10 and the opening 4a are each formed in a rectangular shape and a similar shape in the above-described cross section (that is, a cross section perpendicular to the height direction of the dynamic damper 100). The mass member 10 having a long side and a short side has a larger cross-sectional area in the above-described cross section than the opening 4a. Therefore, the outer shape of the mass member 10 is larger than the outer shape of the opening 4a.

  The anti-vibration member 20 is a part for elastically supporting the mass member 10 on the connecting member 4 (see FIG. 7B), and is made of a rubber-like elastic body. The vibration isolator 20 includes a base portion 21 fixed to one surface side of the mass member 10, a neck portion 22 connected to the base portion 21, a flange portion 23 connected to the neck portion 22, and the flange portion 23. A plate-like portion 24 erected toward the opposite side of the neck portion 22 and a handle portion 25 formed at the erected tip of the plate-like portion 24 are provided.

  The base portion 21 is a portion interposed between the mass member 10 and the connecting member 4 in a state where the dynamic damper 100 is mounted on the connecting member 4 and is configured in a plate shape. The base portion 21 is formed in an outer shape larger than the opening 4a when viewed from below (the lower side in FIG. 5A).

  As shown in FIGS. 6A and 6B, the neck portion 22 is formed in the opening 4a (see FIG. 3) in a state where the dynamic damper 100 is mounted on the connecting member 4 (see FIG. 7B). It is a part to be inserted and is formed in a cylindrical shape. The cross section perpendicular to the height direction of the neck portion 22 is formed in a substantially rectangular shape similar to the opening 4a and the protruding portion 11, and the outer shape is smaller than the base portion 21 and larger than the opening 4a. . Moreover, the neck part 22 has coat | covered the outer surface of the protrusion part 11, and the thickness dimension in the cross section perpendicular | vertical to the height direction (FIG. 6 (a) up-down direction) of the neck part 22 is uniform.

  The flange portion 23 is a portion that is locked to the connecting member 4 in a state in which the dynamic damper 100 is mounted on the connecting member 4, and is from one side (upper side in FIG. 6A) to the other side (FIG. 6A). It is formed in a wedge shape that tapers toward the lower side. In addition, the flange portion 23 is formed in a substantially rectangular cross section perpendicular to the height direction (the vertical direction in FIG. 6A), and the outer shape of one end face is formed larger than the opening 4a. .

  As shown in FIG. 6C and FIG. 6D, the plate-like portion 24 is a portion that transmits the tensile force applied to the handle portion 25 to the flange portion 23, and is formed into four plates. The plate-like body 24a is provided. The four plate-like bodies 24a are radially arranged in a cross-sectional view perpendicular to the height direction (the vertical direction in FIG. 6 (a)), and the portion connected to the flange portion 23 is in addition to the flange portion 23. It extends from the central part on the surface side toward the peripheral part. In addition, compared with the case where the plate-shaped part 24 is connected to the whole other surface side of the flange part 23 by the plate-shaped part 24 being formed from a plurality of plate-shaped bodies 24a, the plate-shaped part 24 and the flange part. The amount of the rubber-like elastic body used can be reduced by reducing the connection area with 23, and the material cost can be reduced.

  The handle portion 25 is a portion that is gripped when the dynamic damper 100 is attached to the connecting member 4 (see FIG. 7B), and the upright ends of the four plate-like bodies 24a are connected, and the lower portion When viewed from (downward in FIG. 6C), the outer shape is smaller than the opening 4 (see FIG. 3). Therefore, the pulling force on the handle portion 25 can be transmitted to the flange portion 23 via the plate-like portion 24. In the present embodiment, the shape of the handle portion 25 is formed in a substantially egg shape. However, the shape is not necessarily limited to this, and may be, for example, a spherical shape or a rectangular parallelepiped shape.

  Next, with reference to FIG. 7, the mounting method of the dynamic damper 100 to the torque rod 1 and the structure at the time of mounting will be described. FIG. 7A is a cross-sectional view of the dynamic damper 100 taken along the line VIIa-VIIa of FIG. 6A, and shows a state before being attached to the torque rod 1. FIG. FIG. 7B is a cross-sectional view of the dynamic damper 100 taken along the line VIIa-VIIa in FIG. 6A, and shows a state after being mounted on the torque rod 1. The height dimension of the neck part 22 (the dimension between the base part 21 and the flange part 23) is the dimension L1, the width dimension in one direction of the flange part 23 is the dimension L2, and the neck part 22 is in one direction (FIG. 7A). The width dimension in the left-right direction) is defined as a dimension L3, the thickness dimension of the connecting member 4 is defined as a dimension L4, and the dimension between opposing faces in one direction of the inner peripheral surface of the opening 4a is defined as a dimension L5.

  As shown in FIG. 7A, in order to attach the dynamic damper 100 to the torque rod 1, the dynamic damper 100 is arranged from the state in which the dynamic damper 100 is disposed on one side of the connecting member 4 (upper side of FIG. 7A). As shown in FIG. 7B, the flange portion 23 is disposed on the other surface side of the connecting member 4 (lower side in FIG. 7A). Specifically, since the dimension L2 is formed larger than the dimension L5, by applying a pulling force to the flange portion 23 from the other surface side of the connecting member 4, the flange portion 23 is removed from the one surface side of the connecting member 4. The flange portion 23 is disposed on the other surface side of the connecting member 4 by being press-fitted and retracted to the other surface side while passing through the opening 4.

  Here, a handle portion 25 is connected to the flange portion 23 via a plate-like portion 24. Moreover, since the handle part 25 is formed in the external shape smaller than the opening 4a, the handle part 25 can be passed to the other surface side of the connection member 4 without being obstructed by the inner peripheral surface of the opening 4a. . Therefore, by pulling the flange portion 23 to the other surface side of the connecting member 4 while gripping the handle portion 25, the flange portion 23 can be pulled from the opening 4 a to the other surface side of the connecting member 4. Therefore, workability when the dynamic damper 100 is mounted on the torque rod 1 can be improved.

  Furthermore, since the plurality of plate-like bodies 24a forming the plate-like portion 24 are arranged radially, the pulling force to the handle portion 25 is reduced while suppressing the amount of rubber-like elastic body used in the plate-like portion 24. It can be efficiently transmitted to the flange portion 25. That is, if the amount of the rubber-like elastic body is used, the portion where the plate-like portion 24 and the flange portion 25 are connected is the flange portion as compared with the case where the plate-like portion 24 is formed in a columnar shape or a cone shape. 23, the load points acting on the flange portion 23 from the handle portion 25 through the plate-like portion 24 can be dispersed. Therefore, the pulling force to the handle portion 25 can be transmitted to a wide area of the flange portion 23 while suppressing the material cost, and as a result, the flange portion 23 can be easily pulled into the other surface side of the connecting member 4 from the opening 4a. Can do.

  Further, since the flange portion 23 is formed in a wedge shape that tapers from one side to the other side, when the dynamic damper 100 is attached to the torque rod 1, the flange portion 23 is opened from one surface side of the connecting member 4 to the opening 4a. Can be gradually press-fitted into. Therefore, when the flange portion 23 is press-fitted into the opening 4a, it is possible to prevent stress from concentrating on a part of the flange portion 23 contacting the peripheral portion of the opening 4a and causing the flange portion 23 to crack.

  As shown in FIG. 7B, when the flange portion 23 passes through the opening 4a, the flange portion 23 is formed to have a larger outer shape than the opening 4a, so that the compression of the flange portion 23 is released and the flange portion 23 is released. Is locked to the other surface side of the connecting member 4. Moreover, since the base | substrate part 21 is formed in the external shape larger than the opening 4a, it is latched by the one surface side of the connection member 4. FIG. As a result, the flange portion 23 is locked to the other surface side of the connecting member 4, the base portion 21 is locked to the one surface side of the connecting member 4, and the dynamic damper 100 is attached to the torque rod 1. be able to.

  As described above, by fitting the flange portion 23 into the opening 4a, the torque rod 1 can be mounted, and when connected to the vibration isolating member and attached to the connecting member 4 as in the conventional product. Since it is not necessary to perform the operation of riveting the mounting plate to be used to the connecting member 4 and the operation of caulking and fixing the mounting plate to the connecting member 4, the mounting operation can be simplified accordingly. Further, since the mounting plate can be made unnecessary, the cost of parts can be reduced correspondingly, and the weight of the product can be reduced.

  In addition, since the neck portion 22 is inserted into the opening 4a and the dimension L1 is smaller than the dimension L4, the base portion is disposed when the connecting member 4 is disposed between the base portion 21 and the flange portion 23. 21 and the flange portion 23 are spread apart in a direction away from each other, and the neck portion 22 is elastically deformed. As a result, the base portion 21 and the flange portion 23 are pressed against the connecting member 4 by the elastic recovery force of the neck portion 22 and are elastically compressed and deformed. Therefore, when the mass member 10 is displaced in a direction approaching or separating from the connecting member 4 (downward or upward direction in FIG. 7B), the displacement amount of the connecting member 4 causes the base portion 21 and the flange portion 23 to be compressed. If it is smaller than the amount, it is possible to avoid the base portion 21 or the flange portion 23 from being separated from the connecting member 4. Therefore, after the base portion 21 or the flange portion 23 is separated from the one surface side or the other surface side of the connecting member 4, the base portion 21 or the flange portion 23 collides with the one surface side or the other surface side of the connecting member 4 to generate noise. Can be prevented.

  Further, since the dimension L3 is formed larger than the dimension L5, the neck 22 is pressed against the inner peripheral surface of the opening 4a in one direction and is elastically compressed and deformed in a state where the neck 22 is inserted into the opening 4a. The

  Further, since the neck portion 22 is formed in a substantially rectangular shape similar to the opening 4a and the protruding portion 11 in a cross section perpendicular to the height direction (the vertical direction in FIG. 7B), the direction perpendicular to one direction ( The width dimension of the neck portion 22 in FIG. 7B (perpendicular to the plane of the drawing) is formed to be larger than the opposing dimension of the opening 4a in the direction perpendicular to one direction. Therefore, in a state where the neck portion 22 is inserted through the opening 4a, the neck portion 22 is similarly pressed against the inner peripheral surface of the opening 4a and elastically compressed in a direction perpendicular to one direction. Therefore, when the connecting member 4 is displaced in one direction or a direction perpendicular to the one direction, if the displacement amount of the connecting member 4 is smaller than the compression amount of the neck portion 22, the neck portion 22 is separated from the connecting member 4. Can be avoided. Therefore, it is possible to prevent the neck portion 22 from colliding with the inner peripheral surface of the opening 4a and generating noise after the neck portion 22 is separated from the inner peripheral surface of the opening 4a.

  In addition, the spring constant of the base | substrate part 21 or the neck part 22 can be adjusted by adjusting the thickness dimension of the base part 21 or the thickness dimension of the neck part 22 in the cross section perpendicular | vertical to the height direction of the neck part 22. FIG.

  Further, the opening 4a is formed in a substantially rectangular shape, and the neck portion 22 is formed in a substantially rectangular shape in a cross section perpendicular to the height direction (the vertical direction in FIG. 7A), so that the dynamic damper 100 is a torque rod. 1, the dynamic damper 100 can be prevented from rotating with respect to the torque rod 1. Furthermore, since the neck portion 22 is formed in a substantially rectangular shape similar to the opening 4a in the cross section perpendicular to the height direction (see FIG. 6B), the neck portion 22 is inserted through the opening 4a. The stress can be prevented from concentrating on a part of the neck portion 22, and as a result, the durability of the neck portion 22 can be improved.

  Here, a method for manufacturing the dynamic damper 100 will be described. When the dynamic damper 100 is manufactured, first, the mass member 10 is placed in a vulcanization mold and clamped, and then a rubber-like elastic body is injected into the vulcanization mold and vulcanized.

  In addition, as in the conventional product, in a dynamic damper provided with a mounting plate (that is, a dynamic damper in which a mass member and a mounting plate are connected by a vibration isolating member, and the mounting plate is attached to the connecting member 4 by riveting or caulking) Since it is necessary to apply the coating to the mounting plate after the vulcanization molding of the vibration isolator, the problem is that the paint adheres to the vibration isolator and the spring constant changes. On the other hand, the dynamic damper 100 according to the present embodiment does not require a mounting plate and can eliminate the need for a coating process on the mounting plate. Changes in the spring constant can be suppressed.

  Next, a second embodiment will be described with reference to FIG. In the first embodiment, the plate-like portion 24 is formed radially from four plate-like bodies 24a, whereas in the second embodiment, the plate-like portion 224 has notches 224a at both ends in the width direction. It is formed in the formed plate shape. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  8A is a front view of the dynamic damper 200 according to the second embodiment, FIG. 8B is a side view of the dynamic damper 200, and FIG. 8C is a front view of the dynamic damper 200. It is a figure and the state where the plate-shaped part 224 was fractured | ruptured is shown in figure. In FIG. 8C, the fracture surface of the plate-like portion 224 is schematically shown in order to simplify the drawing and make the description easy to understand.

  As shown in FIGS. 8A and 8B, the dynamic damper 200 includes a mass member 10 as a mass body and a vibration isolation member 220 that elastically supports the mass member 10 on the torque rod 1. Yes. The vibration isolation member 220 is made of a rubber-like elastic body, and is connected to the base portion 21 fixed to one surface side of the mass member 10, the neck portion 22 connected to the base portion 21, and the neck portion 22. A flange portion 23, a plate-like portion 224 erected from the flange portion 23 toward the opposite side of the neck portion 22, and a handle portion 25 formed at the erected tip of the plate-like portion 224 are provided.

  The plate-like portion 224 is a portion that transmits the tensile force applied to the handle portion 25 to the flange portion 23, and is formed in a single plate shape. Thereby, compared with the case where the plate-like part 224 is connected to the entire other surface side of the flange part 23, the amount of use of the rubber-like elastic body can be reduced by the amount that the connection area between the plate-like part 224 and the flange part 23 can be reduced. Less material costs can be saved. Further, the plate-like portion 224 includes notches 224 a that are notched at both ends at a predetermined distance from a connection portion with the flange portion 23.

  As shown in FIG. 8C, when a pulling force is applied to the handle portion 25, the pulling force is transmitted to the flange portion 23 via the plate-like portion 224. Here, among the cross sections perpendicular to the height direction of the plate-like portion 224 (the vertical direction in FIG. 8C), the cross-section passing through the notch portions 224a formed at both ends of the plate-like portion 224 is compared with the other portions. The cross-sectional area is small. Therefore, when a pulling force of a certain level or more is applied to the handle portion 25, the plate-like portion 224 breaks along a cross section passing through the notches 224a formed at both ends in the width direction of the plate-like portion 224.

  Here, by adjusting the cut amount of the notch 224a and calculating the cross-sectional area passing through the notch 224a at both ends in the width direction of the plate-like part 224, the notch 224a formed at both ends in the width direction is passed. It is possible to set a tensile force necessary to break the cross section. Therefore, it is necessary to pull the flange portion 23 to the other surface side of the connecting member 4 (see FIG. 7) with a tensile force necessary to break in a cross section passing through the notch portions 224a at both ends in the width direction of the plate-like portion 224. By setting the pulling force to be larger than the pulling force, the operator pulls the handle portion 25 until the plate-like portion 224 breaks, thereby confirming that the flange portion 25 is disposed on the other surface side of the connecting member 4. Can be recognized.

  Accordingly, the work of visually confirming that the flange portion 23 is disposed on the other surface side of the connecting member 4 is not required, so that the workability when the dynamic damper 200 is attached to the torque rod 1 can be improved. it can.

  Next, a third embodiment will be described with reference to FIG. In the first embodiment, the plate-like portion 24 is formed radially from four plate-like bodies 24a, whereas in the third embodiment, the plate-like portion 324 has notches 324a at both ends in the width direction. It is formed in the formed plate shape. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 9A is a front view of the dynamic damper 300 according to the third embodiment, FIG. 9B is a side view of the dynamic damper 300, and FIG. 9C is a front view of the dynamic damper 300. It is a figure and the state where the plate-shaped part 324 was cut | disconnected is illustrated. In FIG. 9C, the fracture surface of the plate-like portion 324 is schematically shown in order to simplify the drawing and make the description easy to understand.

  The dynamic damper 300 according to the third embodiment is different from the dynamic damper 200 according to the second embodiment described above except that the formation position of the notch 324a with respect to the plate-like portion 324 is different. Since it is the same, the description is abbreviate | omitted.

  In the second embodiment, the notch 224a is formed closer to the flange portion 23 than the central portion in the longitudinal direction (FIG. 8 (a) vertical direction) of the plate-like portion 224, whereas the third embodiment Then, the notch part 324a is formed in the handle part 25 side rather than the center part of the longitudinal direction (FIG. 9 (a) up-down direction) of the plate-shaped part 324. FIG. Therefore, in the third embodiment, as compared with the second embodiment, after the plate-like portion 324 is broken in a cross section passing through the notches 324a at both ends in the width direction, more plate-like portions are formed on the flange portion 23 side. Part 324 remains.

  Therefore, even if the flange portion 23 is not disposed on the other surface side of the connecting member 4 after the plate-like portion 324 is broken, the plate-like portion 324 remaining on the flange portion 23 after the break is pulled with a nipper or the like. Thus, the flange portion 23 can be pulled into the other surface side of the connecting member 4. Therefore, workability when the dynamic damper 300 is mounted on the torque rod 1 can be improved.

  Next, a fourth embodiment will be described with reference to FIG. In 1st Embodiment, although the case where the shape of the cross section perpendicular | vertical to the height direction of the neck part 22 and the protrusion part 11 was equipped with one anti-vibration member 20 was demonstrated, 4th Embodiment Then, the case where the two anti-vibration members 420 by which the shape of the cross section perpendicular | vertical to the height direction of the neck part 422 and the protrusion part 411 is formed in a substantially circular shape is provided is demonstrated. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. FIG. 10A is a front view of the dynamic damper 400 in the fourth embodiment, and FIG. 10B is a cross-sectional view of the dynamic damper 400 taken along line Xb-Xb in FIG.

  The connecting member (not shown) in the fourth embodiment includes two openings drilled in the thickness direction. The opening is a part for mounting the dynamic damper 400 and is formed in a substantially circular shape when viewed from above. The distance between the two openings formed in the connecting member is two neck portions 422 formed in the dynamic damper 400. It is set to be equal to the interval.

  As shown in FIGS. 10A and 10B, the dynamic damper 400 includes a mass member 410 as a mass body and two vibration isolation members 420 that elastically support the mass member 410 on the torque rod 1. I have.

  The mass member 410 is a rectangular parallelepiped member made of a steel material, and the outer surface is covered with a rubber-like elastic body. Further, the mass member 410 is formed in an outer shape larger than the opening when viewed from below (the downward direction in FIG. 10A). Further, the mass member 410 is formed with a protruding portion 411 that protrudes from one side (the lower side in FIG. 10A). The protruding portion 411 is a cylindrical portion made of the same steel material as that of the mass member 410. The protruding portion 411 protrudes to a position where a neck portion 22 and a flange portion 23, which will be described later, are connected, and has an outer shape smaller than the opening. Is formed.

  The anti-vibration member 420 is made of a rubber-like elastic body, and is connected to the base portion 21 fixed to one surface side of the mass member 410, the neck portion 422 connected to the base portion 21, and the neck portion 422. A flange portion 423, a plate-like portion 424 erected from the flange portion 423 toward the opposite side of the neck portion 422, and a handle portion 425 formed at the standing tip of the plate-like portion 424 are provided.

  The flange portion 423 is formed in a wedge shape that tapers from one side (upper side in FIG. 10A) toward the other side (lower side in FIG. 10A). Further, the flange portion 423 has a cross section perpendicular to the height direction (the vertical direction in FIG. 10A) formed in a substantially rectangular shape, and the outer shape of one end face is formed larger than the opening of the connecting member. ing. The plate-like portion 424 includes four plate-like bodies 424a formed in a plate shape. The four plate-like bodies 424a are radially arranged in a cross section perpendicular to the height direction (the vertical direction in FIG. 10A), and the portion connected to the flange portion 423 is the other surface of the flange portion 423. It extends from the central part on the side toward the peripheral part. The handle portion 425 is formed to have an outer shape smaller than the opening of the connecting member while the standing ends of the four plate-like bodies 424a are connected.

  The neck portion 422 has a cross section perpendicular to the height direction formed in a substantially circular shape similar to the opening of the connecting member and the protruding portion 411, and has an outer shape smaller than the base portion 21 and larger than the opening of the connecting member. Is formed. Further, the outer surface of the projecting portion 411 is covered, and the thickness dimension in the cross section perpendicular to the height direction of the neck portion 422 (the vertical direction in FIG. 10A) is uniform. Since the cross section perpendicular to the height direction of the neck portion 422 is formed in a substantially circular shape similar to the opening of the connecting member and the protruding portion 411, the spring constant in the shear direction of the neck portion 424 can be easily designed. .

  Further, since the dynamic damper 400 includes two vibration-proof members 420, the opening and the neck 422 are attached to the torque rod even if the cross-sectional shape perpendicular to the height direction is formed in a substantially circular shape. It is possible to prevent the dynamic damper 400 from rotating in the state.

  Next, a fifth embodiment will be described with reference to FIG. FIG. 11A is a cross-sectional view of the dynamic damper 500 in the fifth embodiment, and corresponds to the cross-sectional view taken along the line VIb-VIb in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. In the first embodiment, the neck portion 22 and the protruding portion 11 are formed in a substantially rectangular shape having a similar cross-sectional shape perpendicular to the height direction, whereas in the fifth embodiment, the neck portion 522 and the protruding portion. 511 is formed in a substantially elliptical shape having a similar cross-sectional shape perpendicular to the height direction.

  Therefore, the dynamic damper 500 is formed with a torque rod (not shown) by forming a connection member (not shown) with an opening formed in a substantially elliptical shape similar to the neck 522 and smaller than the outer shape of the neck 522. The dynamic damper 500 can be prevented from rotating in the state of being attached to

  Next, a sixth embodiment will be described with reference to FIG. FIG. 11B is a cross-sectional view of the dynamic damper 600 according to the sixth embodiment, and corresponds to the cross-sectional view taken along the line VIb-VIb in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. In the first embodiment, the thickness dimension of the rubber-like elastic body in the cross section perpendicular to the height direction of the neck portion 22 is uniform, whereas in the sixth embodiment, the thickness dimension is perpendicular to the height direction of the neck portion 622. The thickness dimension in one direction in the cross section is different from the thickness dimension in a direction perpendicular to the one direction.

  Therefore, by adjusting the thickness dimension in one direction of the neck portion 622 and the thickness dimension in the direction perpendicular to the one direction, the spring constant in one direction and the one direction can be used while using the rubber-like elastic body of the same material. The spring constant setting in the direction perpendicular to can be set to different values.

  Next, a seventh embodiment will be described with reference to FIG. FIG. 11C is a cross-sectional view of the dynamic damper 700 according to the seventh embodiment, and corresponds to the cross-sectional view taken along the line VIb-VIb in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. In the first embodiment, the neck portion 22 and the protruding portion 11 are formed in a substantially rectangular shape having a similar cross-sectional shape perpendicular to the height direction, whereas in the seventh embodiment, the height of the neck portion 722 is formed. The shape of the cross section perpendicular to the direction is formed into a substantially elliptical shape, and the shape of the cross section perpendicular to the height direction of the protruding portion 711 is formed into a substantially circular shape. The thickness dimension in the direction is different from the thickness dimension in the direction perpendicular to the one direction.

  Therefore, the dynamic damper 700 is formed with a torque rod (not shown) by forming an opening formed in a substantially elliptical shape similar to the neck portion 722 and smaller than the outer shape of the neck portion 722 in the connecting member (not shown). The dynamic damper 700 can be prevented from rotating in the state of being mounted on

  Further, by adjusting the thickness dimension in one direction of the neck portion 722 and the thickness dimension in a direction perpendicular to the one direction, the spring constant in the one direction and the one direction can be used while using the rubber-like elastic body made of the same material. The spring constant setting in the direction perpendicular to can be set to different values.

  Next, an eighth embodiment will be described with reference to FIG. FIG. 12A is a cross-sectional view of the dynamic damper 800 in the eighth embodiment, and corresponds to the cross-sectional view taken along the line VId-VId in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. In the first embodiment, the four plate-like bodies 24a forming the plate-like portion 24 are arranged in parallel to the long side or the short side of the flange portion 23 formed in a substantially rectangular shape. In the eighth embodiment, four plate-like bodies 824a forming the plate-like portion 824 are disposed on the diagonal line of the flange portion 823 formed in a substantially rectangular shape.

  Therefore, the load points that act on the flange portion 823 from the handle portion 25 (see FIG. 7A) via the plate-like portion 824 are dispersed toward each vertex of the flange portion 823. Therefore, it is possible to suppress the bending of each vertex of the flange portion 823 and to easily pull the flange portion 823 from the opening formed in the connecting member (not shown) to the other surface side of the connecting member.

  Next, a ninth embodiment will be described with reference to FIG. FIG. 12B is a cross-sectional view of the dynamic damper 900 according to the ninth embodiment, and corresponds to the cross-sectional view taken along the line VId-VId in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the ninth embodiment, the four plate-like bodies 924a forming the plate-like portion 924 are disposed on the long and short diameters of the flange portion 923 formed in a substantially elliptical shape. Therefore, the load point acting on the flange portion 923 from the handle portion 25 (see FIG. 7A) via the plate-like portion 924 is not only near the center of the end surface on the other surface side of the flange portion 923 but also the flange portion 923. It can disperse | distribute to the position away from the center of the end surface of the other surface side. Therefore, it can suppress that the peripheral part of the flange part 923 bends, and can make it easy to draw in the flange part 923 from the opening formed in a connection member (not shown) to the other surface side of a connection member.

  Next, a tenth embodiment will be described with reference to FIG. FIG. 12C is a cross-sectional view of the dynamic damper 1000 according to the tenth embodiment, and corresponds to the cross-sectional view taken along the line VId-VId in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the first embodiment, the plate-like portion 24 is formed of four plate-like bodies, whereas in the tenth embodiment, the plate-like portion 1024 is formed of three plate-like bodies 1024a. Therefore, in the tenth embodiment, the amount of the rubber-like elastic body can be suppressed and the material cost can be reduced because the number of the plate-like bodies 1024a is smaller than that in the first embodiment.

  Next, an eleventh embodiment will be described with reference to FIG. FIG. 12D is a cross-sectional view of the dynamic damper 1100 according to the eleventh embodiment, and corresponds to the cross-sectional view taken along the line VId-VId in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the first embodiment, the plate-like portion 24 is formed of four plate-like bodies, whereas in the eleventh embodiment, the plate-like portion 1124 is formed of five plate-like bodies 1124a. Therefore, in the eleventh embodiment, the interval between the adjacent plate-like bodies 1124a can be reduced by increasing the number of the plate-like bodies 1124a as compared with the first embodiment. Accordingly, the distance between the load points acting on the flange portion 1123 from the handle portion 25 (see FIG. 7A) via the plate-like portion 1124 can be narrowed, and the flange portion 1123 can be further prevented from being bent. The portion 1123 can be easily pulled from the opening formed in the connecting member (not shown) to the other surface side of the connecting member.

  Next, a twelfth embodiment will be described with reference to FIG. In the first embodiment, the case where the vibration isolation member 20 includes a plate-like portion and a handle portion has been described. However, in the twelfth embodiment, the plate-like portion 24 and the handle portion 25 are omitted. FIG. 13A is a cross-sectional view of a dynamic damper 1200 according to the twelfth embodiment. FIG. 13B is a cross-sectional view of the dynamic damper 1200 and shows a state in the middle of being attached to the torque rod 1. FIG. 13C is a cross-sectional view of the dynamic damper 1200 and shows a state after being mounted on the torque rod 1. 13A to 13C correspond to a cross section taken along line VIIa-VIIa in FIG. 6A. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 13A, the dynamic damper 1200 includes a mass member 1210 as a mass body and a vibration isolation member 1220 that elastically supports the mass member 1210 on the torque rod 1.

  The mass member 1210 is a rectangular parallelepiped member made of a steel material, and the outer surface is covered with a rubber-like elastic body. Further, the mass member 1210 is formed to have a larger outer shape than the opening 4a (see FIG. 13B) when viewed from below (downward in FIG. 5A). Further, the mass member 1210 is formed with a protruding portion 1211 that protrudes from one surface side (the lower side in FIG. 13A). The protruding portion 1211 is a rectangular parallelepiped portion made of the same steel material as that of the mass member 1210, the tip is connected to the position where the neck portion 22 and the flange portion 23 are connected, and the other side of the flange portion 23 (FIG. ) A part of a rectangular parallelepiped shape projecting to the lower end surface, and is formed in an outer shape smaller than the opening 4a.

  The anti-vibration member 1220 is a part for elastically supporting the mass member 1210 on the connecting member 4 and is made of a rubber-like elastic body. The vibration isolation member 1220 includes a base portion 21 that is fixed to one surface side of the mass member 1210, a neck portion 22 that is connected to the base portion 21, and a flange portion 23 that is connected to the neck portion 22.

  As shown in FIGS. 13B and 13C, in order to attach the dynamic damper 1200 to the torque rod 1, the mass member 1210 is pressed from one side of the connecting member 4 to connect the flange portion 23. The flange portion 23 is arranged on the other surface side of the connecting member 4 by press-fitting from the one surface side of the member 4 and pushing it into the other surface side while passing through the opening 4a.

  Here, the protruding portion 1211 protrudes between the position where the neck portion 22 and the flange portion 23 are connected to the end surface on the other side of the flange portion 23 (lower side in FIG. 13B). The bending of the part 23 can be suppressed. Furthermore, since the distance between the projecting tip of the projecting portion 1211 and the peripheral portion of the end surface on the other side (lower side in FIG. 13B) of the flange portion 23 can be reduced, the pressing force applied to the mass member 1210 can be reduced to the flange. It can be easily transmitted to the part 23.

  Therefore, workability at the time of pushing the flange portion 23 from the opening 4a to the other surface side of the connecting member 4 can be improved. Furthermore, compared to the first embodiment, the amount of the rubber-like elastic body can be suppressed and the material cost can be reduced, and the weight of the product can be reduced because the plate-like portion and the handle portion can be omitted. Can be planned.

  Next, a thirteenth embodiment will be described with reference to FIG. In the first embodiment, the base portion 21 is interposed between the mass member 10 and the connecting member 4 in a state where the dynamic damper 100 is attached to the torque rod 1, whereas in the thirteenth embodiment, In a state where the dynamic damper 1300 is attached to the torque rod 1, the first base portion 1321 a and the second base portion 1321 b are interposed between the mass member 1310 and the connecting member 4. FIG. 14 is a cross-sectional view of the dynamic damper 1300 according to the thirteenth embodiment, and corresponds to a cross section taken along line VIIa-VIIa in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 14, the dynamic damper 1300 includes a mass member 1310 as a mass body and a vibration isolation member 1320 that elastically supports the mass member 1310 on the torque rod 1.

  The mass member 1310 is a rectangular parallelepiped member made of a steel material, and the outer surface is covered with a rubber-like elastic body. Further, the mass member 1310 is formed in an outer shape larger than the opening 4a when viewed from below (the lower direction in FIG. 14). Further, the mass member 1310 is formed with a protruding portion 1311 that protrudes from one surface side (the lower side in FIG. 14). The protruding portion 1311 is a rectangular parallelepiped portion made of the same steel material as the mass member 1310, and is a rectangular parallelepiped portion where the tip protrudes to a position where the neck portion 22 and the flange portion 23 are connected to each other through the opening 4 a. Is also formed in a small outer shape.

  The anti-vibration member 1320 is a part for elastically supporting the mass member 1310 on the connecting member 4 and is composed of a rubber-like elastic body. The vibration isolation member 1320 is connected to the first base portion 1321a fixed to one surface side of the mass member 1310, the second base portion 1321b connected to the first base portion 1321a, and the second base portion 1321b. Neck portion 22, flange portion 23 connected to neck portion 22, plate-like portion 24 erected from flange portion 23 toward the opposite side of neck portion 22, and formed at the standing tip of plate-like portion 24 The handle portion 25 is provided.

  The first base portion 1321a is a portion interposed between the mass member 1310 and the second base portion 1321b, and is configured in a plate shape. The first base portion 1321a is formed in an outer shape larger than the opening 4a when viewed from below (the lower side in FIG. 14).

  The second base portion 1321b is a portion interposed between the first base portion 1321a and the neck portion 22, and is formed in a cylindrical shape. The second base portion 1321b has a cross section perpendicular to the height direction formed in a substantially rectangular shape similar to the opening 4a and the protruding portion 1311, and has an outer shape smaller than that of the first base portion 1321a, and the neck portion 22 and the opening. It is formed larger than 4a.

  Therefore, in the state where the dynamic damper 1300 is attached to the torque rod 1, the second base portion 1321b is interposed between the mass member 1310 and the connecting member 4, so that the thickness direction of the second base portion 1321b (see FIG. The spring constant can be easily set by adjusting the outer shape and thickness dimension in the cross section perpendicular to (14 vertical direction).

  Next, with reference to FIG. 15, the torque rod 1400 in 14th Embodiment is demonstrated. In 1st Embodiment, although the case where the projection part 11 which protrudes from the one surface side was formed in the mass member 10 was demonstrated, in 14th Embodiment, a protrusion part is abbreviate | omitted and one surface side of the mass member 1410 is It is formed flat. FIG. 15A is a front view of a dynamic damper 1400 according to the fourteenth embodiment, and FIG. 15B is a cross-sectional view of the dynamic damper 1400 taken along line XVb-XVb in FIG. In addition, about the same part as said each embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIGS. 15A and 15B, the torque rod 1400 includes a rectangular parallelepiped mass member 1410 made of a steel material, and a vibration isolation member that elastically supports the mass member 1410 on the torque rod 1. 1420, and a vibration-proof member 1420 is fixed to one surface side of the mass member 1410. The plate-like base portion 1421 is connected to the base portion 1421 and the height direction (FIG. 15 (a) vertical direction). A neck portion 1422 having a substantially rectangular cross-section, a flange portion 23 connected to the neck portion 1422, and a plate-like portion 24 erected from the flange portion 23 toward the opposite side of the neck portion 22. And a handle portion 25 formed at the standing tip of the plate-like portion 24.

  The dynamic damper 1400 according to the fourteenth embodiment is flat on the one surface side of the mass member 1410 with respect to the dynamic damper 100 according to the first embodiment described above, and the base portion 1421 is the entire one surface side of the mass member 1410. Since the other configurations are the same except for the point of covering and the point that the neck portion 1422 is solidly formed, the description thereof is omitted.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  For example, in each of the above-described embodiments, the torque rod 1 is illustrated as an attachment to which the dynamic dampers 100 to 1400 are attached. However, the present invention is not necessarily limited to this, and an engine mount, a body mount, a bush or the like is prevented. You may attach to structures, such as a vibration apparatus or a steering wheel, a seat, and a door.

  In each of the above embodiments, the case where the flange portions 23, 423, 823, 923, 1023, and 1123 are formed in a wedge shape that tapers from one side to the other side has been described. However, the present invention is not necessarily limited thereto. The flange portion may be formed in a columnar shape.

  In each of the above-described embodiments, the case where the outer shape of the neck portions 22, 422, 522, 622, 722, and 1422 and the opening 4a are similar to each other has been described. It may be non-similar. For example, when the cross section perpendicular to the height direction of the neck is formed into a substantially rectangular shape and the opening is formed into a substantially square shape, the cross section perpendicular to the height direction of the neck is formed into a substantially elliptical shape, and the opening is formed into a substantially circular shape. The case where it forms is illustrated. Thereby, in a state where the neck portion is inserted through the opening, by adjusting the compression amount of the neck portion in one direction and the compression amount of the neck portion in the direction perpendicular to the one direction, the spring constant of the neck portion in one direction, The neck spring constant in a direction perpendicular to one direction can be set to different values.

  In each of the above embodiments, the case where the neck portions 22, 422, 522, 622, 722, and 1422 are formed in an outer shape larger than the opening 4a has been described. However, the present invention is not necessarily limited to this, and the height direction of the neck portion The width dimension in at least one direction in the cross section perpendicular to the width may be set to a dimension larger than the dimension between the opposing surfaces in one direction of the inner peripheral surface of the opening. When the direction in which the torque rod vibrates is limited to one direction, only the width dimension in one direction in the cross section perpendicular to the height direction of the neck is larger than the dimension between the opposing surfaces in one direction of the inner peripheral surface of the opening. The width of the neck in the direction perpendicular to the one direction is set to be smaller than or equal to the dimension between the opposing surfaces of the inner peripheral surface of the opening in the direction perpendicular to the one direction. The material cost can be reduced by suppressing the amount of use.

  In the second embodiment and the third embodiment, the case where the plate-like portions 224 and 324 where the notches 224a and 324a are formed is formed as a single plate is described. Instead, the plate-like portion may be formed from a plurality of plate-like bodies, and a notch portion may be formed in each plate-like body.

  In the fourth embodiment, the case where the dynamic damper 400 includes two vibration isolation members 420 has been described. However, the present invention is not necessarily limited to this, and the dynamic damper includes three or more vibration isolation members 420. Also good.

  In the eleventh embodiment, the case where the plate-like portion 1124 is formed from five plate-like bodies 1124a has been described. However, the present invention is not necessarily limited to this, and the plate-like portion includes six or more plate-like bodies. 1124a may be formed.

  Note that each configuration described in each embodiment may be replaced with each configuration described in the other embodiments, and each configuration described in each embodiment has been described in other embodiments. You may combine or add each structure. For example, the neck portion 22 having a substantially rectangular cross section in the height direction described in the first embodiment may be replaced with the neck portion 422 having a substantially circular cross section in the height direction described in the fourth embodiment.

1 Torque rod (attachment)
4 connecting members (part of the attachment)
4a Opening 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400 Dynamic damper 10, 410, 1210, 1310, 1410 Mass members 20, 220, 320, 420, 1220, 1320, 1420 Anti-vibration members 21, 1421 Base part 1321a First base part (part of base part)
1321b Second base part (part of base part)
22, 422, 522, 622, 722, 1422 Neck part 23, 423, 823, 923, 1023, 1123 Flange part 24, 224, 324, 424, 824, 924, 1024, 1124, plate-like parts 24a, 224a, 324a, 424a, 824a, 924a, 1024a, 1124a Plate-like body 25, 425 Handle part

Claims (4)

A dynamic damper comprising: a mass member as a mass body; and a vibration isolating member that is connected to the mass member and is attached to an object to be attached and configured by a rubber-like elastic body,
The vibration isolator is
A base portion fixed to one side of the mass member;
A neck portion connected to the base portion and formed in an outer shape smaller than the base portion;
A flange portion connected to the neck portion and formed in a larger outer shape than the neck portion,
The attachment object is formed in a plate shape having an opening smaller than the outer shape of at least the base body and the flange,
The neck portion is inserted into the opening with respect to the attachment object, and the base portion or the flange portion is attached in a state of being disposed on one surface side or the other surface side of the attachment object. Dynamic damper.   2. The dynamic damper according to claim 1, wherein a distance between the base portion and the flange portion is set to be smaller than a plate thickness of the attachment object.   The width of the neck portion in at least a first direction is set to a size that is larger than the size of the inner peripheral surface of the opening in the first direction. Dynamic damper. The vibration isolating member includes a plate-like portion formed from a plurality of plate-like bodies that are erected from the flange portion toward the opposite side of the neck portion, and a standing tip of the plate-like portion. The dynamic damper according to any one of claims 1 to 3, further comprising a handle portion that is formed and has a smaller outer shape than the flange portion.

Images