WO2016027598A1 - 防振装置 - Google Patents
防振装置 Download PDFInfo
- Publication number
- WO2016027598A1 WO2016027598A1 PCT/JP2015/070426 JP2015070426W WO2016027598A1 WO 2016027598 A1 WO2016027598 A1 WO 2016027598A1 JP 2015070426 W JP2015070426 W JP 2015070426W WO 2016027598 A1 WO2016027598 A1 WO 2016027598A1
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- WIPO (PCT)
- Prior art keywords
- axial direction
- liquid chamber
- partition
- vibration
- partition plate
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/10—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like
- F16F13/105—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like characterised by features of partitions between two working chambers
- F16F13/106—Design of constituent elastomeric parts, e.g. decoupling valve elements, or of immediate abutments therefor, e.g. cages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
- B60K5/12—Arrangement of engine supports
- B60K5/1208—Resilient supports
Definitions
- the present invention relates to a vibration isolator that is applied to, for example, automobiles and industrial machines and absorbs and attenuates vibrations of a vibration generating unit such as an engine.
- This application claims priority based on Japanese Patent Application No. 2014-167274 for which it applied to Japan on August 20, 2014, and uses the content here.
- the vibration isolator includes a cylindrical first mounting member coupled to one of the vibration generating unit and the vibration receiving unit, a second mounting member coupled to the other, and an elastic body that couples both the mounting members.
- a partition member that divides the liquid chamber in the first mounting member in which the liquid is sealed into a main liquid chamber and a sub liquid chamber whose elastic body is a part of the wall surface, and a storage chamber provided in the partition member
- a movable member accommodated so as to be deformable or displaceable in the axial direction of the first mounting member.
- the partition member is provided with a plurality of communication holes extending inward in the axial direction from a portion of the partition member exposed to the main liquid chamber or the sub liquid chamber and opening toward the movable member.
- the inventors of the present invention have provided a large number of pore-shaped communication holes in the partition member, thereby reducing the momentum of the liquid flowing through the communication holes while ensuring the opening area of the entire communication holes. It has become possible to reduce the resonance magnification of resonance by the communication hole without reducing the axial distance between the movable member and the wall surface of the storage chamber. That is, the conventional vibration isolator has room for improvement in forming more communication holes.
- the present invention has been made in view of the above-described circumstances, and an object thereof is to make it possible to form more communication holes.
- the vibration isolator according to the present invention includes a cylindrical first attachment member connected to one of the vibration generating portion and the vibration receiving portion, a second attachment member connected to the other, and both of these attachment members.
- a partition member that partitions an elastic body to be connected, a liquid chamber in the first mounting member in which the liquid is sealed, into a main liquid chamber and a sub liquid chamber having the elastic body as a part of a wall surface, and provided in the partition member
- An anti-vibration device provided with a plurality of communication holes extending toward the inner side in the axial direction and opening toward the movable member.
- the partition member has a front surface and a rear surface facing the axial direction.
- a liquid chamber or sub-liquid chamber is partitioned in the axial direction and directed in the axial direction.
- a partition plate is provided comprising communication hole penetrates the partition plate in the axial direction.
- vibration isolator of the present invention more communication holes can be formed.
- the vibration isolator 10 includes a cylindrical first mounting member 11 connected to one of a vibration generating unit and a vibration receiving unit, and a second mounting member 12 connected to the other.
- An elastic body 13 that elastically connects the first mounting member 11 and the second mounting member 12, and a liquid chamber 16 that is disposed inside the first mounting member 11 and formed inside the first mounting member 11.
- the partition member 15 is provided to partition the main liquid chamber 16a and the sub liquid chamber 16b.
- each of these members is provided coaxially with the central axis O.
- the direction along the central axis O is referred to as the axial direction (the axial direction of the first mounting member), and the direction orthogonal to the central axis O is referred to as the radial direction (the radial direction of the first mounting member).
- the direction to go around is called the circumferential direction (the circumferential direction of the first mounting member).
- the liquid chamber 16 is divided into the main liquid chamber 16a on one side in the axial direction (upper side in FIG. 1) and the other side in the axial direction (in FIG. 1) by the partition member 15. It is divided into a sub-liquid chamber 16b on the lower side.
- the vibration isolator 10 is attached to, for example, an automobile and suppresses transmission of engine vibration to the vehicle body.
- the second mounting member 12 is connected to an engine (not shown) as a vibration generating unit, while the first mounting member 11 is connected to a vehicle body as a vibration receiving unit via a bracket (not shown).
- the second mounting member 12 is disposed on one axial side of the first mounting member 11.
- An elastic body 13 is vulcanized and bonded to the inner peripheral surface of one end of the first attachment member 11 in the axial direction.
- One end of the first attachment member 11 in the axial direction is closed in a liquid-tight state by the elastic body 13.
- the elastic body 13 is a member made of a resin material such as rubber.
- the elastic body 13 is formed in a truncated cone shape that protrudes from one end in the axial direction of the first mounting member 11 toward the one side in the axial direction and is gradually reduced in diameter toward the one side in the axial direction.
- the elastic body 13 is formed integrally with a covering portion 13 a that covers the entire inner peripheral surface of the first attachment member 11.
- the covering portion 13 a extends from the elastic body 13 along the inner peripheral surface of the first mounting member 11 toward the other side in the axial direction, and is vulcanized and bonded to the inner peripheral surface of the first mounting member 11.
- the partition member 15 is integrally formed of, for example, an aluminum alloy or a resin.
- the partition member 15 includes a mounting cylinder portion 17 and partition plate portions 18 and 19.
- the mounting cylinder portion 17 is mounted in the first mounting member 11.
- the mounting cylinder portion 17 is disposed coaxially with the central axis O, and is fitted in a portion of the first mounting member 11 that is located on the other side in the axial direction from the portion where the elastic body 13 is vulcanized and bonded.
- the mounting cylinder portion 17 is fitted in the first mounting member 11 in a liquid-tight state via the covering portion 13a.
- the end portion on the other side in the axial direction of the mounting cylinder portion 17 is closed in a liquid-tight state by the diaphragm 14.
- the diaphragm 14 is fixed to the mounting cylinder portion 17 from the other side in the axial direction.
- the mounting cylinder portion 17 is provided with a flange portion 17a protruding outward in the radial direction, and the diaphragm 14 is fixed to the flange portion 17a in a liquid-tight state. Thereby, the liquid can be enclosed in the liquid chamber 16 located inside the first mounting member 11 and between the elastic body 13 and the diaphragm 14.
- the partition plate portions 18 and 19 close the inside of the mounting cylinder portion 17 to form a storage chamber 20 in the mounting cylinder portion 17.
- the front and back surfaces of the partition plate portions 18 and 19 face the axial direction, and the partition plate portions 18 and 19 are arranged coaxially with the central axis O.
- the partition plate portions 18 and 19 are convex in the axial direction and are formed in a spherical shape.
- the thickness of the partition plate portions 18 and 19, which is a size along the axial direction of the partition plate portions 18 and 19, is, for example, 5 mm or less, and preferably 2 mm or more and 5 mm or less.
- a pair of partition plate portions 18 and 19 are provided with an interval in the axial direction, and a storage chamber 20 is formed between the partition plate portions 18 and 19.
- a first partition plate 18 that partitions the storage chamber 20 and the main liquid chamber 16a in the axial direction
- a second partition plate that partitions the storage chamber 20 and the auxiliary liquid chamber 16b in the axial direction.
- Part 19 is provided.
- Both of the partition plate portions 18 and 19 are convex toward the outer side in the axial direction (opposite side of the storage chamber), and are formed in a shape inverted in the axial direction.
- the partition member 15 is divided
- the partition member 15 is divided into a plurality of divided bodies 15a, 15b, and 15c so as to divide the storage chamber 20 in the axial direction.
- the 1st divided body 15a which has the 1st division board part 18, the 2nd divided body 15b which has the 2nd division board part 19, and the 3rd divided body 15c which has flange part 17a , Is provided.
- the partition member 15 is provided with a storage chamber 20, a restriction passage 21, and a communication hole 22.
- the storage chamber 20 has a circular shape in a plan view when the partition member 15 is viewed from the axial direction, and is disposed coaxially with the central axis O.
- the outer diameter of the storage chamber 20 is larger than the outer diameters of both partition plate portions 18 and 19.
- the size of the storage chamber 20 along the axial direction gradually increases from the outside in the radial direction of the storage chamber 20 toward the inside.
- a movable member 23 (movable plate, membrane) is disposed in the storage chamber 20.
- the movable member 23 is accommodated in the storage chamber 20 so as to be deformable in the axial direction.
- the movable member 23 is formed in a plate shape whose front and back surfaces are directed in the axial direction by a resin material such as rubber, for example, and is elastically deformable.
- the movable member 23 is deformed in the axial direction according to the pressure difference between the main liquid chamber 16a and the sub liquid chamber 16b.
- the movable member 23 is formed in a flat plate shape extending in a direction orthogonal to the central axis O.
- the outer peripheral edge of the movable member 23 is fixed in the axial direction with respect to the partition member 15.
- An axial gap is provided between a portion of the movable member 23 located on the inner side of the outer peripheral edge and the wall surface of the storage chamber 20.
- the restriction passage 21 communicates the main liquid chamber 16a and the sub liquid chamber 16b.
- the restriction passage 21 extends along the circumferential direction on the outer peripheral surface of the partition member 15 and is disposed so as to avoid the storage chamber 20.
- the restriction passage 21 is tuned so that resonance (liquid column resonance) occurs when an engine shake vibration having a frequency of about 10 Hz is input, for example.
- the communication hole 22 extends from the portion exposed to the main liquid chamber 16a or the sub liquid chamber 16b in the partition member 15 toward the inner side (the storage chamber side) in the axial direction and opens toward the movable member 23.
- a plurality of communication holes 22 are provided in each of the first partition plate portion 18 and the second partition plate portion 19. All the communication holes 22 are formed in the same shape and the same size.
- the communication hole 22 penetrates the partition plate portions 18 and 19 in the axial direction, and directly connects the main liquid chamber 16a or the sub liquid chamber 16b and the storage chamber 20.
- the communication hole 22 has a circular shape in a plan view when the partition member 15 is viewed from the axial direction, and the planar view shape of the communication hole 22 is a perfect circle.
- the communication hole 22 is formed in a tapered shape extending in the axial direction. All of the large-diameter openings among the both-end openings in each of the plurality of communication holes 22 are opened in common on the surfaces facing the outside in the axial direction in the partition plates 18 and 19.
- the communication hole 22 is gradually reduced in diameter toward the inner side in the axial direction.
- an end portion located on the inner side in the axial direction is formed with the same diameter portion 22 a having the same inner diameter regardless of the position in the axial direction.
- the minimum inner diameter of the communication hole 22, that is, the inner diameter of the small-diameter opening (the same-diameter portion 22a) among the openings at both ends of the communication hole 22 may be 3.6 mm or less.
- the communication holes 22 are arranged so as to circumscribe each other over the entire area of the partition plate portions 18 and 19.
- the communication holes 22 are arranged over the entire circumference in the circumferential direction, thereby forming an annular communication hole row 25 that is coaxial with the central axis O.
- the communication hole row 25 has a regular hexagonal shape having six sides in plan view.
- a plurality of communication hole rows 25 are provided, and the diameters thereof are different from each other.
- the plurality of communication hole rows 25 are similar to each other.
- the number of communication holes 22 constituting one side portion in one communication hole row 25 is such that one side portion is constituted in another communication hole row 25 adjacent to the one communication hole row 25 from the inside in the radial direction. One more than the number of communication holes 22 to be connected.
- the communication holes 22 constituting the side portions are arranged so as to be different from each other in the circumferential direction.
- One communication hole 22 disposed coaxially with the central axis O is provided inside the communication hole array 25 having the smallest diameter among the plurality of communication hole arrays 25.
- a plurality of communication holes 22 are arranged in each of the first partition plate portion 18 and the second partition plate portion 19 so as to form the communication hole rows 25 having the same shape and the same size.
- the positions along the circumferential direction of the communication holes 22 are the same in the communication hole rows 25 having the same diameter.
- vibration having a small amplitude for example, ⁇ 0.2 mm or less
- idle vibration having a frequency of around 30 Hz acts on the vibration isolator 10 and the pressure of the liquid in the main liquid chamber 16a fluctuates, The movable member 23 is deformed in the axial direction in the storage chamber 20. Thereby, vibration can be absorbed and attenuated.
- vibration having a larger amplitude than the above-described minute amplitude acts on the vibration isolator 10 and the pressure of the liquid in the main liquid chamber 16a fluctuates.
- the movable member 23 contacts the wall surface of the storage chamber 20 in the partition member 15 and closes the communication hole 22. At this time, the liquid flows between the main liquid chamber 16a and the sub liquid chamber 16b through the restriction passage 21, and liquid column resonance occurs, so that vibration can be absorbed and attenuated.
- the partition plate portions 18 and 19 are convex in the axial direction, and the communication hole 22 extends the partition plate portions 18 and 19 in the axial direction. It penetrates. Therefore, for example, compared with the case where the partition plate portions 18 and 19 are not convex in the axial direction and are formed in a flat plate shape extending in a direction orthogonal to the central axis O, a large number of communication holes 22 are provided. Can be formed.
- partition plate portions 18 and 19 are formed in a spherical shape, for example, more communication holes 22 can be formed as compared with the case where the partition plate portions 18 and 19 are formed in a cone shape. . Furthermore, since all the large-diameter openings in each of the plurality of communication holes 22 are opened in common on the surfaces of the partition plate portions 18 and 19, many communication holes are provided while stabilizing the characteristics of the vibration isolator 10. 22 can be formed.
- the first partition plate portion 18 and the second partition plate portion 19 are formed in the same shape and the same size. Both the partition plate portions 18 and 19 are convex toward one side in the axial direction. Thereby, the storage chamber 20 formed in both partition plate parts 18 and 19 is also formed in the spherical surface which becomes convex toward an axial direction one side. The size of the storage chamber 20 along the axial direction is the same throughout the storage chamber 20. According to the vibration isolator 30 according to the present embodiment, it is possible to achieve the same effects as the vibration isolator 10 according to the first embodiment.
- the partition plate portions 18 and 19 are not convex in the axial direction, but in a direction orthogonal to the central axis O. It is formed in a flat plate shape that extends.
- the first partition plate portion 18 and the second partition plate portion 19 have the same shape and the same size.
- a base hole 41 is provided instead of forming the communication hole 22 in the partition plate portions 18 and 19, a base hole 41 is provided.
- a plurality of base holes 41 are provided in each of the first partition plate portion 18 and the second partition plate portion 19. All the base holes 41 have the same shape and the same size.
- the base hole 41 penetrates the partition plate portions 18 and 19 in the axial direction.
- the base hole 41 has a circular shape in a plan view when the partition member 15 is viewed from the axial direction, and the planar view shape of the base hole 41 is a perfect circle.
- the base hole 41 has the same diameter over the entire length in the axial direction.
- the base hole 41 is disposed over the entire area of the partition plate portions 18 and 19.
- the base holes 41 are arranged over the entire circumference in the circumferential direction to constitute an annular base hole row 42 that is coaxial with the central axis O.
- the base hole row 42 has a regular hexagonal shape in the plan view.
- a plurality of base hole rows 42 are provided with different diameters, and the diameters thereof are different from each other.
- the plurality of base hole rows 42 are similar to each other.
- the number of base holes 41 constituting one side portion in one base hole row 42 is such that one side portion is constituted in another base hole row 42 adjacent to the one base hole row 42 from the inside in the radial direction. One more than the number of base holes 41 to be performed.
- the base holes 41 constituting the side portions of the base hole rows 42 are alternately arranged in the circumferential direction.
- One base hole 41 disposed coaxially with the central axis O is provided inside the base hole row 42 having the smallest diameter among the plurality of base hole rows 42.
- a plurality of base holes 41 are arranged in the first partition plate portion 18 and the second partition plate portion 19 so as to form base hole rows 42 having the same shape and the same size.
- the positions along the circumferential direction of the base holes 41 are the same in the base hole rows 42 formed in the same size.
- the partition member 15 is provided with a bulging portion 43 that is disposed so as to cover the base hole 41 and bulges outward from the partition plate portions 18 and 19 in the axial direction.
- the bulging portion 43 covers the base hole 41 from the outside in the axial direction.
- a plurality of bulging portions 43 are provided corresponding to each of the plurality of base holes 41, and one bulging portion 43 is disposed so as to cover one base hole 41, and closes one base hole 41. ing.
- the bulging portion 43 is formed in a hemispherical shape that protrudes outward in the axial direction.
- the bulging portion 43 is disposed coaxially with the hole axis L of the base hole 41.
- the bulging portion 43 closes the axially outer opening of the base hole 41.
- the outer peripheral edge of the bulging part 43 is connected across the inner peripheral surface of the axially outer opening in the base hole 41 and the opening peripheral part of the base hole 41 on the surface of the partition plate part 18. .
- the outer peripheral edge of the bulging portion 43 may be connected only to the surface of the partition plate portion 18, or may be connected only to the inner peripheral surface of the base hole 41.
- an end surface facing the inner side in the axial direction is formed as a tapered surface 44 that gradually decreases in diameter toward the outer side in the axial direction.
- the tapered surface 44 is formed in a conical shape that protrudes outward in the axial direction.
- the tapered surface 44 forms an intermediate space 45 that is continuous with the base hole 41 from the outside in the axial direction.
- the plurality of bulging portions 43 are arranged so as to circumscribe each other over the entire area of the partition plate portions 18 and 19.
- the communication hole 22 passes through the bulging portion 43 in the axial direction, and opens toward the movable member 23 through the intermediate space 45 and the base hole 41.
- the large-diameter opening of the communication hole 22 opens on the surface of the bulging portion 43 that faces outward in the axial direction.
- the same diameter portion 22 a of the communication hole 22 opens in the tapered surface 44.
- a plurality of communication holes 22 are provided in the bulging portion 43.
- a plurality of first communication holes 48 provided around the hole axis L of the base hole 41 and second communication holes 49 provided on the hole axis L are provided.
- One second communication hole 49 is arranged coaxially with the hole axis L.
- the axis of the first communication hole 48 is inclined with respect to the hole axis L, and six around the hole axis L are arranged.
- the first communication hole 48 penetrates the bulging portion 43 in the axial direction, and the bulging portion 43 has a hole axis of the base hole 41.
- a plurality are provided around L and open toward the movable member 23 through the base hole 41. Therefore, for example, the liquid pressure of the liquid flowing through the first communication hole 48 can be reliably applied to the movable member 23 through the base hole 41.
- many communication holes 22 can be formed as compared with the case where the communication holes 22 simply pass through the partition plate portions 18 and 19 in the axial direction.
- the base hole 41 has a square shape in a plan view, and has a regular hexagonal shape in the illustrated example.
- the base hole 41 is formed in a tapered shape extending in the axial direction. All of the large-diameter openings among the openings at both ends in each of the plurality of base holes 41 are opened in common on the surfaces of the partition plate portions 18 and 19.
- the base hole 41 is gradually reduced in diameter toward the inner side in the axial direction.
- An end portion located on the inner side in the axial direction in the base hole 41 is formed with the same diameter portion 41a having the same inner diameter regardless of the position in the axial direction.
- the outer peripheral edge portion of the bulging portion 43 is connected to the inner peripheral surface of the base hole 41 limited to a portion located on the outer side in the axial direction from the same diameter portion 41a.
- the tapered surface 44 of the bulging portion 43 is formed in a spherical shape that protrudes outward in the axial direction, and extends parallel to the surface of the bulging portion 43.
- first communication hole 48 is provided as the communication hole 22.
- Three first communication holes 48 are provided around the hole axis L of the base hole 41.
- the first communication holes 48 have the same shape and the same size.
- the first communication hole 48 has a pentagonal shape in plan view.
- a part of the inner peripheral surface of the first communication hole 48 is configured by the inner peripheral surface of the base hole 41.
- the first communication hole 48 is formed symmetrically with respect to a reference line that passes through a central portion around the hole axis L and is orthogonal to the hole axis L in plan view.
- a portion of the bulging portion 43 located between the first communication holes 48 adjacent to each other around the hole axis L is an arch portion 51 that extends linearly in a direction orthogonal to the hole axis L in plan view.
- Three arch portions 51 are arranged around the hole axis L at intervals.
- the arch part 51 is mutually connected via the center part located on the hole axis
- FIG. As shown in FIG. 9, the partition member 15 is provided with a reinforcing portion 52 that reinforces the arch portion 51.
- the reinforcing portion 52 extends from the arch portion 51 toward the inner side in the axial direction until reaching the opening portion on the inner side in the axial direction in the base hole 41.
- the reinforcing portion 52 is connected to the inner peripheral surface of the base hole 41.
- vibration isolator 50 According to the vibration isolator 50 according to the present embodiment, it is possible to achieve the same effects as the vibration isolator 40 according to the third embodiment.
- restriction passage 21 is provided in the above embodiment, the restriction passage 21 may not be provided.
- the partition plate portions 18 and 19 are formed in a spherical shape, but the present invention is not limited to this.
- the partition plate portions 18 and 19 may be formed in a conical shape.
- the communication hole 22 is gradually reduced in diameter toward the inner side in the axial direction, but the present invention is not limited to this.
- the communication hole 22 may gradually increase in diameter toward the inner side in the axial direction.
- the communication hole 22 may not be formed in a tapered shape extending in the axial direction.
- the communication hole 22 may be formed to have the same diameter over the entire length in the axial direction, and the minimum inner diameter and the maximum inner diameter of the communication hole 22 may be matched with the inner diameter of the communication hole 22. In this case, if the inner diameter of the communication hole 22 is 3.6 mm or less, the minimum inner diameter of the communication hole 22 can be 3.6 mm or less. As shown in FIG.
- the distance is defined as the inner diameter of the communication hole 22.
- the minimum inner diameter of the communication hole 22 can be 3.6 mm or less.
- the movable member 23 a configuration different from that of the above embodiment may be adopted.
- the movable member 23 may be accommodated in the accommodation chamber 20 so as to be axially displaceable, and the movable member 23 may be accommodated in the accommodation chamber 20 so as to be deformable or displaceable in the axial direction.
- the configuration can be adopted as appropriate.
- the present invention is not limited to this, and conversely, the first mounting member 11 and the engine may be connected, and the second mounting member 12 and the vehicle body may be connected.
- a vibration device 10 may be installed.
- the vibration isolator 30 according to the second embodiment shown in FIG. 3 is adopted as the vibration isolator of Example 1
- the vibration isolator 40 according to the third embodiment shown in FIG. 4 is adopted as the vibration isolator of Example 2.
- the vibration isolator 50 according to the fourth embodiment shown in FIG. As a vibration isolator of the comparative example 4, in the vibration isolator 10 which concerns on 1st Embodiment shown in FIG. 1, the structure which replaced the partition plate parts 18 and 19 with the flat form extended in the direction orthogonal to the central axis O is used. Adopted.
- vibration isolator of the present invention more communication holes can be formed.
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- General Engineering & Computer Science (AREA)
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- Transportation (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
本願は、2014年8月20日に、日本に出願された特願2014-167274号に基づき優先権を主張し、その内容をここに援用する。
このような防振特性の悪化を抑えるため、可動部材と収容室の壁面との軸方向の間隔を狭め、可動部材の収容室内での軸方向の変形または変位を規制する構成を採用することが考えられる。しかしながらこの場合、高精度な寸法管理が必要となり設計上多くの制約が生じる上、大振幅の振動が入力されたときに、例えば、可動部材が収容室の壁面に衝突する等して異音が生じ、防振装置の防振特性が悪化する可能性がある。
つまり、従来の防振装置には、より多くの連通孔を形成することについて改善の余地がある。
本発明に係る防振装置は、振動発生部および振動受部のうちの一方に連結される筒状の第1取付け部材、および他方に連結される第2取付け部材と、これらの両取付け部材を連結する弾性体と、液体が封入された第1取付け部材内の液室を、弾性体を壁面の一部とする主液室と、副液室と、に仕切る仕切り部材と、仕切り部材に設けられた収容室内に、第1取付け部材の軸方向に変形可能または変位可能に収容された可動部材と、を備え、仕切り部材には、仕切り部材において主液室または副液室に露出する部分から軸方向の内側に向けて延び、可動部材に向けて開口する複数の連通孔が設けられた防振装置であって、仕切り部材には、表裏面が軸方向を向くとともに、収容室と、主液室または副液室と、を軸方向に区画し、軸方向に向けて凸となる区画板部が備えられ、連通孔は、区画板部を軸方向に貫通している。
次に、本発明に係る第1実施形態の防振装置を、図1および図2を参照して説明する。
図1に示すように、防振装置10は、振動発生部および振動受部のうちのいずれか一方に連結される筒状の第1取付け部材11、および他方に連結される第2取付け部材12と、第1取付け部材11および第2取付け部材12を弾性的に連結する弾性体13と、第1取付け部材11の内側に配置され、第1取付け部材11の内側に形成された液室16を、主液室16aと副液室16bとに区画する仕切り部材15とを備えている。
ここで、前述の液室16は、仕切り部材15により、弾性体13を壁面の一部とする軸方向一方側(図1における上側)の主液室16aと、軸方向他方側(図1における下側)の副液室16bとに区画されている。
防振装置10は、例えば自動車等に装着され、エンジンの振動が車体に伝達するのを抑える。防振装置10では、第2取付け部材12が振動発生部としての図示されないエンジンに連結される一方、第1取付け部材11が図示されないブラケットを介して振動受部としての車体に連結される。
第1取付け部材11における軸方向一方側の端部の内周面には、弾性体13が加硫接着されている。第1取付け部材11における軸方向一方側の端部は、弾性体13により液密状態で閉塞されている。
なお図示の例では、弾性体13は、第1取付け部材11の内周面を全域に亘って覆う被覆部13aと一体に形成されている。被覆部13aは、弾性体13から第1取付け部材11の内周面に沿って軸方向他方側に向けて延び、第1取付け部材11の内周面に加硫接着されている。
装着筒部17は、第1取付け部材11内に装着されている。装着筒部17は、中心軸線Oと同軸に配置され、第1取付け部材11において、弾性体13が加硫接着された部分よりも軸方向他方側に位置する部分内に嵌合されている。装着筒部17は、第1取付け部材11内に、被覆部13aを介して液密状態で嵌合されている。
図示の例では、仕切り部材15は、収容室20を軸方向に分割するように、複数の分割体15a、15b、15cに分割される。分割体15a、15b、15cとして、第1区画板部18を有する第1分割体15aと、第2区画板部19を有する第2分割体15bと、フランジ部17aを有する第3分割体15cと、が備えられている。
収容室20は、仕切り部材15を軸方向から見た平面視において、円形状をなしていて、中心軸線Oと同軸に配置されている。収容室20の外径は、両区画板部18、19の外径よりも大きい。収容室20の軸方向に沿った大きさは、収容室20の径方向の外側から内側に向けて漸次大きくなっている。
なお連通孔22の最小内径、つまり連通孔22の両端開口部のうちの小径開口部(同径部22a)の内径は、3.6mm以下となっていてもよい。
複数の連通孔列25のうち、最も直径が小さい連通孔列25の内側には、中心軸線Oと同軸に配置された1つの連通孔22が設けられている。
さらに、複数の連通孔22それぞれにおける大径開口部がいずれも、区画板部18、19の表面に共通して開口しているので、防振装置10の特性を安定させつつ、多くの連通孔22を形成することができる。
次に、本発明に係る第2実施形態の防振装置を、図3を参照して説明する。
なお、この第2実施形態においては、第1実施形態における構成要素と同一の部分については同一の符号を付し、その説明を省略し、異なる点についてのみ説明する。
本実施形態に係る防振装置30によれば、第1実施形態に係る防振装置10と同様の作用効果を奏することができる。
次に、本発明に係る第3実施形態の防振装置を、図4から図7を参照して説明する。
なお、この第3実施形態においては、第1実施形態における構成要素と同一の部分については同一の符号を付し、その説明を省略し、異なる点についてのみ説明する。
複数のベース孔列42のうち、最も直径が小さいベース孔列42の内側には、中心軸線Oと同軸に配置された1つのベース孔41が設けられている。
図7に示すように、複数の膨出部43は、区画板部18、19の全域にわたって互いに外接するように配置されている。
次に、本発明に係る第4実施形態の防振装置を、図8から図11を参照して説明する。
なお、この第4実施形態においては、第3実施形態における構成要素と同一の部分については同一の符号を付し、その説明を省略し、異なる点についてのみ説明する。
図9に示すように、仕切り部材15には、アーチ部51を補強する補強部52が設けられている。補強部52は、アーチ部51から軸方向の内側に向けて、ベース孔41における軸方向の内側の開口部に至るまで延びている。補強部52は、ベース孔41の内周面に連結されている。
さらに連通孔22が、軸方向に延びるテーパー状に形成されていなくてもよい。例えば、連通孔22を、軸方向の全長にわたって同径に形成し、連通孔22の最小内径と最大内径とを連通孔22の内径に一致させてもよい。この場合、連通孔22の内径を3.6mm以下とすると、連通孔22の最小内径を3.6mm以下とすることが可能である。また、図10に示すように、連通孔22が円形ではなく、多角形等(図10では五角形)であった場合、連通孔22の孔軸Lと直交する直線における、連通孔22の最短横断距離を連通孔22の内径と定義する。この場合も、連通孔22の最小内径は3.6mm以下とすることができる。
細孔状の連通孔22の内径を3.6mm以下とすることによって、連通孔22を流通する液体の勢いを十分に弱めることが可能となる。従って、液体が可動部材23に及ぼす影響を小さくすることができる。
結果を図12のグラフに示す。グラフの横軸は、入力された振動の周波数(Hz)を表し、グラフの縦軸は、Kを表す。またグラフにおいて、複数のグラフ線L1、L2、L3、L4はそれぞれ、実施例1、実施例2、実施例3、比較例4をそれぞれ表す。
11 第1取付け部材
12 第2取付け部材
13 弾性体
15 仕切り部材
16 液室
16a 主液室
16b 副液室
18、19 区画板部
20 収容室
22 連通孔
23 可動部材
41 ベース孔
43 膨出部
L 孔軸
Claims (4)
- 振動発生部および振動受部のうちの一方に連結される筒状の第1取付け部材、および他方に連結される第2取付け部材と、
これらの両取付け部材を連結する弾性体と、
液体が封入された前記第1取付け部材内の液室を、前記弾性体を壁面の一部とする主液室と、副液室と、に仕切る仕切り部材と、
前記仕切り部材に設けられた収容室内に、前記第1取付け部材の軸方向に変形可能または変位可能に収容された可動部材と、を備え、
前記仕切り部材には、前記仕切り部材において前記主液室または前記副液室に露出する部分から前記軸方向の内側に向けて延び、前記可動部材に向けて開口する複数の連通孔が設けられた防振装置であって、
前記仕切り部材には、表裏面が前記軸方向を向くとともに、前記収容室と、前記主液室または前記副液室と、を前記軸方向に区画し、前記軸方向に向けて凸となる区画板部が備えられ、
前記連通孔は、前記区画板部を前記軸方向に貫通している防振装置。 - 前記区画板部は、球面状に形成されている請求項1記載の防振装置。
- 前記連通孔は、前記軸方向に延びるテーパー状に形成され、
前記複数の連通孔それぞれにおける両端開口部のうちの大径開口部はいずれも、前記区画板部において前記軸方向の外側を向く表面、または前記軸方向の内側を向く裏面に共通して開口している請求項1または2記載の防振装置。 - 振動発生部および振動受部のうちの一方に連結される筒状の第1取付け部材、および他方に連結される第2取付け部材と、
これらの両取付け部材を連結する弾性体と、
液体が封入された前記第1取付け部材内の液室を、前記弾性体を壁面の一部とする主液室と、副液室と、に仕切る仕切り部材と、
前記仕切り部材に設けられた収容室内に、前記第1取付け部材の軸方向に変形可能または変位可能に収容された可動部材と、を備え、
前記仕切り部材には、前記仕切り部材において前記主液室または前記副液室に露出する部分から前記軸方向の内側に向けて延び、前記可動部材に向けて開口する複数の連通孔が設けられた防振装置であって、
前記仕切り部材には、
表裏面が前記軸方向を向くとともに、前記収容室と、前記主液室または前記副液室と、を前記軸方向に区画する区画板部と、
前記区画板部を前記軸方向に貫通するベース孔を覆うように配置され、前記区画板部から前記軸方向の外側に向けて膨出する膨出部と、が備えられ、
前記連通孔は、前記膨出部を前記軸方向に貫通するとともに、前記膨出部に、前記ベース孔の孔軸回りに複数設けられ、前記ベース孔を通して前記可動部材に向けて開口している防振装置。
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CN106574683A (zh) | 2017-04-19 |
US9726251B2 (en) | 2017-08-08 |
CN106574683B (zh) | 2019-03-05 |
EP3184850B1 (en) | 2019-01-23 |
EP3184850A4 (en) | 2017-09-13 |
EP3184850A1 (en) | 2017-06-28 |
US20160053844A1 (en) | 2016-02-25 |
JPWO2016027598A1 (ja) | 2017-04-27 |
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