WO2016175273A1 - Vibration-damping device - Google Patents
Vibration-damping device Download PDFInfo
- Publication number
- WO2016175273A1 WO2016175273A1 PCT/JP2016/063321 JP2016063321W WO2016175273A1 WO 2016175273 A1 WO2016175273 A1 WO 2016175273A1 JP 2016063321 W JP2016063321 W JP 2016063321W WO 2016175273 A1 WO2016175273 A1 WO 2016175273A1
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- WIPO (PCT)
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- vibration
- holder
- liquid chamber
- elastic film
- elastic membrane
- Prior art date
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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
Definitions
- the present invention relates to a vibration isolator for vibration isolating and supporting a vibration member such as an engine on a non-vibration member such as a vehicle body.
- a liquid-filled vibration isolator (engine mount) interposed between an engine of an automobile or the like and a vehicle body includes a first attachment member attached to the engine, a second attachment member attached to the vehicle body, and a first attachment. And an insulator interposed between the member and the second mounting member.
- a partition member and a diaphragm are attached to the insulator, a main liquid chamber is formed between the insulator and the partition member, and a secondary liquid chamber is formed between the partition member and the diaphragm.
- the partition member is formed with an orifice passage for communicating the main liquid chamber and the sub liquid chamber.
- the liquid-filled vibration isolator is formed with a second orifice passage in the partition member for communicating the main liquid chamber and the sub liquid chamber, and the second orifice passage is provided.
- a second orifice passage in the partition member for communicating the main liquid chamber and the sub liquid chamber, and the second orifice passage is provided.
- an opening / closing member that opens and closes is attached to a partition member (see, for example, Patent Document 1).
- the second orifice passage when the amplitude of the vibration input to the first mounting member is small, the second orifice passage is closed by the opening / closing member, and the liquid column resonance generated in the first orifice passage causes Damping vibration. Further, when the amplitude of the vibration input to the first mounting member is large, the second orifice passage is opened, and the vibration is attenuated by liquid column resonance occurring in the second orifice passage.
- the above-described conventional vibration isolator has a problem that the number of parts increases because an opening / closing member for opening / closing the second orifice passage is provided independently.
- An object of the present invention is to solve the above-mentioned problems and to provide a vibration isolator capable of attenuating vibrations in different amplitude regions by using two kinds of orifice passages without increasing the number of parts.
- the present invention is a vibration isolator interposed between a vibration member and a non-vibration member.
- the vibration isolator includes a first attachment member attached to the vibration member and a second attachment member attached to the non-vibration member.
- the vibration isolator includes an insulator interposed between the first attachment member and the second attachment member, and a partition member and a diaphragm attached to the insulator.
- a main liquid chamber is formed between the insulator and the partition member, and a sub liquid chamber is formed between the partition member and the diaphragm.
- the partition member includes a holder attached to the insulator and an elastic film member attached to the holder.
- the holder is formed with a first orifice passage for communicating the main liquid chamber and the sub liquid chamber.
- the elastic membrane member In an initial state, the elastic membrane member is disposed with a gap on the main liquid chamber side with respect to the displacement regulating portion of the holder, and the main liquid chamber is disposed in the gap between the elastic membrane member and the displacement regulating portion.
- a second orifice passage is formed to communicate the chamber and the sub liquid chamber.
- the vibration isolator of the present invention when the vibration input to the first mounting member is equal to or smaller than the predetermined amplitude, the elastic film member does not come into contact with the displacement restricting portion of the holder. Therefore, when the vibration input to the first mounting member has a low amplitude, the vibration is attenuated by the liquid column resonance generated in the second orifice passage.
- the vibration isolator of the present invention when the vibration input to the first mounting member is larger than the predetermined amplitude, the hydraulic pressure in the main liquid chamber increases, and the elastic membrane member is deformed by the hydraulic pressure. Thus, the elastic film member comes into contact with the displacement restricting portion of the holder. As a result, the second orifice passage is closed.
- the elastic film member is deformed according to the magnitude of the amplitude, so that the two kinds of orifice passages are appropriately switched, so that vibrations in different amplitude regions are effectively damped. be able to.
- the vibration isolator of the present invention after the shock vibration is input to the first mounting member, when the liquid pressure in the main liquid chamber suddenly decreases, the elastic film member is sucked to the main liquid chamber side and elastic The gap between the membrane member and the holder widens. As a result, the second orifice passage is expanded, and the working fluid flows from the sub liquid chamber to the main liquid chamber through the second orifice passage, so that the main liquid chamber can be prevented from being in a negative pressure state. Cavitation in which bubbles are generated in the hydraulic fluid can be prevented.
- the second orifice passage is opened and closed by the elastic membrane member of the partition member, so that the vibration damping performance can be enhanced without increasing the number of parts compared to the conventional vibration isolator.
- the partition member is provided with another holder attached to the insulator, and the elastic film member is spaced from the displacement restricting portion of the other holder toward the sub liquid chamber side. You may arrange.
- the displacement restricting members of the two holders can suppress the amount of displacement of the elastic film member toward the main liquid chamber side and the liquid liquid chamber side, so that the durability of the elastic film member can be improved. .
- an outer peripheral portion of the elastic film member is attached to the holder, a hole is formed in the elastic film member, and the second orifice passage is formed by the hole and the gap. Also good.
- the vibration input to the first mounting member is larger than a predetermined amplitude, the outer peripheral portion of the hole is in contact with the displacement restricting portion of the holder so that the second orifice passage is closed. It is desirable to configure.
- the outer peripheral portion of the hole portion of the elastic membrane member is a portion that is easily deformed, and the elastic membrane member is likely to be deformed according to the magnitude of the amplitude.
- the vibration in the amplitude region can be effectively damped. Further, even when the hydraulic pressure in the main liquid chamber suddenly decreases, the elastic membrane member is reliably deformed, so that cavitation in which bubbles are generated in the working fluid in the main liquid chamber can be effectively prevented.
- the elastic film member includes an elastic film part, a hole part formed in the elastic film part, and an outer peripheral part formed on an outer peripheral edge part of the elastic film part. It is preferable.
- the spring characteristic of the elastic membrane member can be adjusted by forming the thickness of the portion on the hole portion side of the elastic membrane portion larger than the thickness of the portion on the outer peripheral portion side.
- the vibration isolator of the present invention two kinds of orifice passages are provided, and one orifice passage is opened and closed by the elastic membrane member of the partition member. Therefore, vibrations in different frequency regions can be effectively damped and the number of parts can be reduced. The vibration damping performance can be improved without increasing the frequency. Further, in the vibration isolator of the present invention, when the hydraulic pressure in the main liquid chamber suddenly decreases, the second orifice passage is expanded, thereby preventing the main liquid chamber from entering a negative pressure state. Therefore, cavitation in which bubbles are generated in the hydraulic fluid in the main liquid chamber can be prevented.
- the vibration isolator 1 of the present embodiment is between an engine such as an automobile (“vibrating member” in claims) and a vehicle body (“non-vibrating member” in claims).
- This is a liquid-filled engine mount interposed between the two.
- the vibration member is a vibration generation source (for example, an engine or a motor).
- the non-vibrating member is a member (for example, a vehicle body or the like) that does not want to transmit vibration of the vibrating member.
- the vibration isolator 1 includes a first attachment member 10 attached to the engine and a second attachment member 20 attached to the vehicle body.
- the vibration isolator 1 includes an insulator 30 interposed between the first attachment member 10 and the second attachment member 20, and a partition member 40 and a diaphragm 50 attached to the lower portion of the insulator 30. Yes.
- the first mounting member 10 is a metal member that is insert-molded on the top of the insulator 30. Substantially the entire first mounting member 10 is covered with the insulator 30, and the upper end of the first mounting member 10 is exposed to the outside. A screw hole 11 is formed at the center of the upper end surface of the first mounting member 10, and a bolt (not shown) for mounting the first mounting member 10 to a bracket (not shown) on the engine side is formed in the screw hole 11. (Not shown) are screwed together.
- the second mounting member 20 is a cylindrical metal member. The lower part of the insulator 30 is vulcanized and bonded to the inner peripheral surface of the second mounting member 20.
- the insulator 30 is a rubber elastic member formed in a substantially truncated cone shape. A space (concave portion) opened downward is formed in the lower portion of the insulator 30. A first mounting member 10 is insert-molded on the top of the insulator 30. The lower part of the insulator 30 is formed in a cylindrical shape along the inner peripheral surface of the second mounting member 20, and is vulcanized and bonded to the inner peripheral surface of the second mounting member 20.
- a partition member 40 is attached inside the lower portion of the insulator 30.
- the partition member 40 closes the opening of the insulator 30.
- a main liquid chamber 1 a is formed above the partition member 40.
- the main liquid chamber 1a is a space surrounded by the inner surface of the insulator 30 and the upper surface of the partition member 40, and is filled with an incompressible hydraulic fluid.
- a diaphragm 50 is provided below the partition member 40.
- the diaphragm 50 includes a rubber film 51 and a metal cylindrical frame member 52.
- the outer peripheral surface of the film 51 is vulcanized and bonded to the inner peripheral surface of the frame member 52.
- the frame member 52 is inserted into the second mounting member 20, and the frame member 52 is fixed in the second mounting member 20 by caulking the lower edge of the second mounting member 20.
- a sub liquid chamber 1 b is formed between the partition member 40 and the membrane 51 of the diaphragm 50.
- the auxiliary liquid chamber 1b is a space surrounded by the lower surface of the partition member 40 and the upper surface of the membrane 51 of the diaphragm 50, and incompressible hydraulic fluid is enclosed therein.
- the partition member 40 includes a lower holder 41, an upper holder 42 attached to the upper surface of the lower holder 41, and an elastic film member 43 sandwiched between the lower holder 41 and the upper holder 42.
- the lower holder 41 is a resin member, and as shown in FIG. A concave groove 41 a that becomes the first orifice passage 45 is formed on the outer peripheral surface of the lower holder 41.
- One end of the recessed groove 41 a opens on the lower surface of the lower holder 41, and the other end of the recessed groove 41 a opens on the upper surface of the lower holder 41.
- a circular recess 41 b is formed at the center of the upper surface of the lower holder 41.
- An elastic membrane member 43 (see FIG. 1) is accommodated in the recess 41b.
- Four communication holes 41e are formed around the center of the bottom 41c of the recess 41b. Each communication hole 41e penetrates the bottom 41c of the recess 41b in the vertical direction.
- a region between the central portion and each communication hole 41e is a displacement restricting portion 41g that restricts the displacement of the elastic film member 43.
- the upper holder 42 is a resin member, and is formed in a disk shape as shown in FIG. As shown in FIG. 1, the upper holder 42 is overlaid on the upper surface of the lower holder 41. In the present embodiment, the upper holder 42 is fixed to the upper surface of the lower holder 41 by fitting the engagement protrusions 41 f formed on the upper surface of the lower holder 41 into the engagement holes 42 f of the upper holder 42.
- a first series of through holes 42d penetrates the central portion of the upper holder 42 in the vertical direction.
- four second communication holes 42e penetrate in the vertical direction around the first series of through holes 42d.
- a region between the communication holes 42 d and 42 e is a displacement restricting portion 42 g that restricts the displacement of the elastic film member 43.
- the communication holes 42 d and 42 e of the upper holder 42 communicate with the recess 41 b of the lower holder 41.
- an opening 42a penetrates in the vertical direction outside each second communication hole 42e (see FIG. 2A). The opening 42 a communicates with one end of the concave groove 41 a of the lower holder 41.
- the elastic film member 43 is a rubber member, and as shown in FIG. 2B, a disk-shaped elastic film part 43b, a fixing part 43a formed on the outer peripheral edge of the elastic film part 43b, And a hole 43c formed at the center of the elastic film part 43b.
- the elastic membrane member 43 is accommodated in the recess 41b of the lower holder 41 as shown in FIG.
- the elastic film portion 43 b is disposed between the lower surface 42 b of the upper holder 42 and the bottom surface 41 c of the concave portion 41 b of the lower holder 41.
- the fixing portion 43a is a cylindrical portion surrounding the elastic film portion 43b, and protrudes in the vertical direction with respect to the upper surface and the lower surface of the elastic film portion 43b.
- the fixing portion 43 a is sandwiched between the upper holder 42 and the lower holder 41.
- the elastic film member 43 is fixed to the upper holder 42 and the lower holder 41 by sandwiching the fixing portion 43 a between the upper holder 42 and the lower holder 41.
- the upper surface of the elastic film portion 43b and the lower surface 42b of the upper holder 42 are separated from each other, and the lower surface of the elastic film portion 43b and the bottom surface 41c of the concave portion 41b of the lower holder 41 are separated from each other.
- the hole 43c penetrates the central part of the elastic film part 43b in the vertical direction (see FIG. 2B).
- the inside of the hole 43 c is a part that becomes the second orifice passage 46.
- the outer peripheral part of the central hole part 43c of the elastic film part 43b is a part that is most easily deformed (easily bent) by the elastic film part 43b.
- a cylindrical inner peripheral portion 43d that protrudes in the vertical direction is formed on the outer peripheral portion of the hole portion 43c (see FIG. 2B).
- the elastic film part 43b is formed so that the thickness of the part on the hole part 43c side is larger than the thickness of the part on the fixing part 43a side. That is, in the elastic film part 43b, the weight of the part on the hole part 43c side is larger than the weight of the part on the fixed part 43a side.
- the lower surface 43e of the inner peripheral portion 43d is disposed with a gap on the upper side (main liquid chamber 1a side) with respect to the displacement restricting portion 41g of the lower holder 41.
- An annular gap serving as the second orifice passage 46 is formed between the inner peripheral portion 43 d of the elastic film portion 43 b and the displacement restricting portion 41 g of the lower holder 41.
- the upper surface 43f of the inner peripheral portion 43d is disposed with a gap on the lower side (sub liquid chamber 1b side) with respect to the displacement restricting portion 42g of the upper holder 42.
- An annular gap is also formed between the inner peripheral portion 43 d of the elastic film portion 43 b and the displacement restricting portion 42 g of the upper holder 42.
- the outer peripheral surface of the lower holder 41 is covered by the lower end portion of the insulator 30, and the opening outside the concave groove 41 a of the lower holder 41 is closed by the insulator 30. ing.
- a first orifice passage 45 is formed by the opening 42 a of the upper holder 42 and the concave groove 41 a of the lower holder 41.
- path 45 is a flow path which connects the main liquid chamber 1a and the subliquid chamber 1b.
- a second orifice passage 46 is formed by the hole 43c and a gap between the lower surface 43e of the inner peripheral portion 43d and the displacement restricting portion 41g of the lower holder 41.
- the second orifice passage 46 is a flow path for communicating the main liquid chamber 1a and the sub liquid chamber 1b.
- the second orifice passage 46 has an upper portion formed in a cylindrical shape and an intermediate portion formed in an annular shape (flange shape). The second orifice passage 46 communicates with the main liquid chamber 1a through the communication holes 42d and 42e of the upper holder 42 and also communicates with the sub liquid chamber 1b through the communication holes 41e of the lower holder 41.
- the vibration isolator 1 is configured to absorb vibration input from the engine to the first mounting member 10 by elastic deformation of the insulator 30.
- the vibration isolator 1 when the insulator 30 is elastically deformed by vibration, the working fluid flows through the first orifice passage 45 and the second orifice passage 46.
- the inner peripheral portion 43d of the elastic film portion 43b and the displacement restricting portion 41g of the lower holder 41 A gap serving as the second orifice passage 46 is formed therebetween. Further, a gap is formed between the inner peripheral portion 43 d of the elastic film portion 43 b and the displacement restricting portion 42 g of the upper holder 42.
- the vibration isolator 1 when the vibration input to the first mounting member 10 has a predetermined amplitude or less, the vibration is attenuated mainly by liquid column resonance that occurs in the second orifice passage 46.
- the vibration below a predetermined amplitude is a low-amplitude vibration that occurs during idling.
- the vibration isolator 1 when the vibration input to the first mounting member 10 is larger than a predetermined amplitude, the hydraulic pressure in the main liquid chamber 1a increases. Then, as shown in FIG. 3B, the elastic film part 43b of the elastic film member 43 is elastically deformed downward due to the hydraulic pressure in the main liquid chamber 1a, and the elastic film part 43b on the hole 43c side is elastically deformed downward. The part is bent downward.
- the vibration larger than the predetermined amplitude is a high-amplitude vibration that occurs when traveling on a rough road.
- the vibration isolator 1 when shock pressure is input to the first mounting member 10 (see FIG. 1) and the hydraulic pressure in the main liquid chamber 1a is suddenly reduced, the vibration isolator 1 is shown in FIG. As described above, the elastic film portion 43b of the elastic film member 43 is sucked toward the main liquid chamber 1a.
- the elastic film portion 43b is elastically deformed upward, and the portion of the elastic film portion 43b on the hole 43c side is bent upward, and the upper surface 43f of the inner peripheral portion 43d of the elastic film member 43 is formed.
- the displacement restricting portion 42g of the upper holder 42 Thereby, the clearance gap between the lower surface 43e of the inner peripheral part 43d of the elastic film member 43 and the displacement control part 41g of the lower holder 41 spreads, and the 2nd orifice channel
- the hydraulic fluid flows from the secondary liquid chamber 1b to the main liquid chamber 1a through the second orifice passage 46, so that the main liquid chamber 1a can be prevented from being in a negative pressure state.
- the hydraulic fluid in the main liquid chamber 1a It is possible to prevent cavitation in which bubbles are generated.
- vibration isolator 1 when low-amplitude vibration is input during idling operation, vibration is caused by liquid column resonance generated in the second orifice passage 46. Attenuate.
- high amplitude vibration is input when traveling on a rough road or the like, the vibration is attenuated by liquid column resonance generated in the first orifice passage 45 as shown in FIG.
- the elastic film member 43 is deformed according to the magnitude of the vibration amplitude, so that the two kinds of orifice passages are appropriately switched. Therefore, vibrations in different amplitude regions are effectively attenuated. can do.
- the hydraulic pressure in the main liquid chamber 1a rapidly decreases after shocking vibration is input to the first mounting member 10, such as when the vehicle goes over a step, and FIG. As shown, the second orifice passage 46 is expanded. As a result, since the working fluid flows from the secondary fluid chamber 1b to the main fluid chamber 1a through the second orifice passage 46, the main fluid chamber 1a can be prevented from being in a negative pressure state, and the working fluid in the main fluid chamber 1a can be prevented. It is possible to prevent cavitation in which bubbles are generated.
- the inner peripheral portion 43 d of the elastic film member 43 is formed at a portion where the elastic film member 43 is easily deformed.
- the kinds of orifice passages 45 and 46 can be switched reliably to effectively attenuate vibrations in different amplitude regions. Further, even when the hydraulic pressure in the main liquid chamber 1a suddenly decreases, the elastic membrane member 43 is reliably deformed, so that cavitation in which bubbles are generated in the working fluid in the main liquid chamber 1a is effectively prevented. Can do.
- the vibration damping performance can be enhanced without increasing the number of parts compared to the conventional vibration isolator. .
- the vibration isolator 1 since the displacement amount of the elastic film member 43 is suppressed by the displacement restricting members 41g and 42g of the holders 41 and 42, the durability of the elastic film member 43 can be improved.
- the inner peripheral part 43d is formed in the elastic film member 43, and the spring characteristic of the elastic film member 43 can be adjusted by adjusting the thickness of the inner peripheral part 43d.
- a columnar protrusion 41 d may protrude upward at the center of the bottom surface of the recess 41 b of the lower holder 41.
- the elastic film member 43 By inserting the protruding portion 41 d into the hole 43 c of the elastic film portion 43 b of the elastic film member 43, the elastic film member 43 can be positioned with respect to the lower holder 41.
- a cylindrical gap serving as the second orifice passage 46 is formed between the inner peripheral surface of the hole 43c and the outer peripheral surface of the protrusion 41d.
- path 46 can be adjusted by changing the outer diameter and height of the projection part 41d, or changing the internal diameter of the center hole 42g.
- the inner peripheral portion 43d of the elastic film member 43 of the present embodiment protrudes in the vertical direction with respect to the elastic film portion 43b, but the protruding portion protrudes from the elastic film portion 43b. It only has to protrude in at least one of the vertical directions. Furthermore, the inner peripheral portion 43 d may not be formed in the elastic film member 43.
- the elastic film member 43 is sandwiched between the upper holder 42 and the lower holder 41, but the elastic film member 43 may be attached to the upper surface of the lower holder 41 without providing the upper holder 42.
- the vibration isolator 1 of this embodiment is interposed between the engine which is a vibration member and the vehicle body which is a non-vibration member, the vibration member and non-vibration member to which the vibration isolation device of the present invention can be applied. Is not limited.
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Abstract
A vibration-damping device (1) is provided with a partition member (40) and a diaphragm (50), which are mounted to an insulator (30). The partition member (40) is provided with a lower holder (41) which is mounted to the insulator (30) and an elastic diaphragm member (43) which is mounted to the lower holder (41). A first orifice passage (45) is formed in the lower holder (41), and a second orifice passage (46) is formed in the gap between the elastic diaphragm member (43) and the displacement prevention section (41g) of the lower holder (41). When the amplitude of vibration is greater than a predetermined amplitude, the gap between the elastic diaphragm member (43) and the displacement prevention section (41g) is closed by the elastic diaphragm member (43). As a result of this configuration, vibration in different frequency regions can be damped by the two types of the orifice passages (45, 46) without increasing the number of parts.
Description
本発明は、エンジン等の振動部材を車体等の非振動部材に防振支持するための防振装置に関する。
The present invention relates to a vibration isolator for vibration isolating and supporting a vibration member such as an engine on a non-vibration member such as a vehicle body.
自動車等のエンジンと車体との間に介設される液体封入式の防振装置(エンジンマウント)は、エンジンに取り付けられる第一取付部材と、車体に取り付けられる第二取付部材と、第一取付部材と第二取付部材との間に介設されたインシュレータと、を備えている。
A liquid-filled vibration isolator (engine mount) interposed between an engine of an automobile or the like and a vehicle body includes a first attachment member attached to the engine, a second attachment member attached to the vehicle body, and a first attachment. And an insulator interposed between the member and the second mounting member.
液体封入式の防振装置では、インシュレータに仕切部材およびダイヤフラムを取り付け、インシュレータと仕切部材との間に主液室を形成するとともに、仕切部材とダイヤフラムとの間に副液室を形成している。また、仕切部材には、主液室と副液室とを連通させるオリフィス通路が形成されている。
In the liquid-sealed vibration isolator, a partition member and a diaphragm are attached to the insulator, a main liquid chamber is formed between the insulator and the partition member, and a secondary liquid chamber is formed between the partition member and the diaphragm. . The partition member is formed with an orifice passage for communicating the main liquid chamber and the sub liquid chamber.
また、液体封入式の防振装置としては、第一のオリフィス通路の他に、主液室と副液室とを連通させる第二のオリフィス通路を仕切部材に形成し、第二のオリフィス通路を開閉する開閉部材を仕切部材に取り付けているものがある(例えば、特許文献1参照)。
In addition to the first orifice passage, the liquid-filled vibration isolator is formed with a second orifice passage in the partition member for communicating the main liquid chamber and the sub liquid chamber, and the second orifice passage is provided. There is one in which an opening / closing member that opens and closes is attached to a partition member (see, for example, Patent Document 1).
前記した防振装置では、第一取付部材に入力された振動の振幅が小さい場合には、第二のオリフィス通路が開閉部材によって閉じた状態となり、第一のオリフィス通路内に生じる液柱共振によって振動を減衰する。
また、第一取付部材に入力された振動の振幅が大きい場合には、第二のオリフィス通路が開いた状態となり、第二のオリフィス通路内に生じる液柱共振によって振動を減衰する。 In the above-described vibration isolator, when the amplitude of the vibration input to the first mounting member is small, the second orifice passage is closed by the opening / closing member, and the liquid column resonance generated in the first orifice passage causes Damping vibration.
Further, when the amplitude of the vibration input to the first mounting member is large, the second orifice passage is opened, and the vibration is attenuated by liquid column resonance occurring in the second orifice passage.
また、第一取付部材に入力された振動の振幅が大きい場合には、第二のオリフィス通路が開いた状態となり、第二のオリフィス通路内に生じる液柱共振によって振動を減衰する。 In the above-described vibration isolator, when the amplitude of the vibration input to the first mounting member is small, the second orifice passage is closed by the opening / closing member, and the liquid column resonance generated in the first orifice passage causes Damping vibration.
Further, when the amplitude of the vibration input to the first mounting member is large, the second orifice passage is opened, and the vibration is attenuated by liquid column resonance occurring in the second orifice passage.
前記した従来の防振装置では、第二のオリフィス通路を開閉するための開閉部材が独立して設けられているため、部品点数が増加するという問題がある。
The above-described conventional vibration isolator has a problem that the number of parts increases because an opening / closing member for opening / closing the second orifice passage is provided independently.
本発明は、前記した問題を解決し、部品点数を増加することなく、二種類のオリフィス通路によって、異なる振幅領域の振動を減衰することができる防振装置を提供することを目的とする。
An object of the present invention is to solve the above-mentioned problems and to provide a vibration isolator capable of attenuating vibrations in different amplitude regions by using two kinds of orifice passages without increasing the number of parts.
前記課題を解決するため、本発明は、振動部材と非振動部材との間に介設される防振装置である。前記防振装置は、前記振動部材に取り付けられる第一取付部材と、前記非振動部材に取り付けられる第二取付部材と、を備えている。また、前記防振装置は、前記第一取付部材と前記第二取付部材との間に介設されたインシュレータと、前記インシュレータに取り付けられた仕切部材およびダイヤフラムと、を備えている。前記インシュレータと前記仕切部材との間に主液室が形成されるとともに、前記仕切部材と前記ダイヤフラムとの間に副液室が形成されている。前記仕切部材は、前記インシュレータに取り付けられるホルダと、前記ホルダに取り付けられた弾性膜部材と、を備えている。前記ホルダには、前記主液室と前記副液室とを連通させる第一オリフィス通路が形成されている。初期状態において、前記弾性膜部材は、前記ホルダの変位規制部に対して前記主液室側に隙間を空けて配置され、前記弾性膜部材と前記変位規制部との隙間には、前記主液室と前記副液室とを連通させる第二オリフィス通路が形成されている。前記第一取付部材に入力された振動が所定の振幅よりも大きい場合には、前記弾性膜部材が弾性変形して、前記弾性膜部材と前記変位規制部との隙間が塞がれる。
なお、防振装置の初期状態とは、防振装置が振動部材と非振動部材との間に組み付けられ、第一取付部材に振動が入力されていない状態である。 In order to solve the above problem, the present invention is a vibration isolator interposed between a vibration member and a non-vibration member. The vibration isolator includes a first attachment member attached to the vibration member and a second attachment member attached to the non-vibration member. The vibration isolator includes an insulator interposed between the first attachment member and the second attachment member, and a partition member and a diaphragm attached to the insulator. A main liquid chamber is formed between the insulator and the partition member, and a sub liquid chamber is formed between the partition member and the diaphragm. The partition member includes a holder attached to the insulator and an elastic film member attached to the holder. The holder is formed with a first orifice passage for communicating the main liquid chamber and the sub liquid chamber. In an initial state, the elastic membrane member is disposed with a gap on the main liquid chamber side with respect to the displacement regulating portion of the holder, and the main liquid chamber is disposed in the gap between the elastic membrane member and the displacement regulating portion. A second orifice passage is formed to communicate the chamber and the sub liquid chamber. When the vibration input to the first mounting member is larger than a predetermined amplitude, the elastic film member is elastically deformed, and the gap between the elastic film member and the displacement restricting portion is closed.
The initial state of the vibration isolator is a state in which the vibration isolator is assembled between the vibration member and the non-vibration member, and no vibration is input to the first mounting member.
なお、防振装置の初期状態とは、防振装置が振動部材と非振動部材との間に組み付けられ、第一取付部材に振動が入力されていない状態である。 In order to solve the above problem, the present invention is a vibration isolator interposed between a vibration member and a non-vibration member. The vibration isolator includes a first attachment member attached to the vibration member and a second attachment member attached to the non-vibration member. The vibration isolator includes an insulator interposed between the first attachment member and the second attachment member, and a partition member and a diaphragm attached to the insulator. A main liquid chamber is formed between the insulator and the partition member, and a sub liquid chamber is formed between the partition member and the diaphragm. The partition member includes a holder attached to the insulator and an elastic film member attached to the holder. The holder is formed with a first orifice passage for communicating the main liquid chamber and the sub liquid chamber. In an initial state, the elastic membrane member is disposed with a gap on the main liquid chamber side with respect to the displacement regulating portion of the holder, and the main liquid chamber is disposed in the gap between the elastic membrane member and the displacement regulating portion. A second orifice passage is formed to communicate the chamber and the sub liquid chamber. When the vibration input to the first mounting member is larger than a predetermined amplitude, the elastic film member is elastically deformed, and the gap between the elastic film member and the displacement restricting portion is closed.
The initial state of the vibration isolator is a state in which the vibration isolator is assembled between the vibration member and the non-vibration member, and no vibration is input to the first mounting member.
本発明の防振装置では、第一取付部材に入力された振動が所定の振幅以下の場合には、弾性膜部材がホルダの変位規制部に当接しない。したがって、第一取付部材に入力された振動が低振幅である場合には、第二オリフィス通路内に生じる液柱共振によって振動を減衰する。
また、本発明の防振装置では、第一取付部材に入力された振動が所定の振幅よりも大きい場合には、主液室の液圧が増加し、その液圧によって弾性膜部材が変形して、弾性膜部材がホルダの変位規制部に当接する。これにより、第二オリフィス通路が閉じられる。したがって、第一取付部材に入力された振動が高振幅である場合には、第一オリフィス通路内に生じる液柱共振によって振動を減衰する。
このように、本発明の防振装置では、振幅の大きさに応じて弾性膜部材が変形することで、二種類のオリフィス通路が適宜に切り替わるため、異なる振幅領域の振動を効果的に減衰することができる。 In the vibration isolator of the present invention, when the vibration input to the first mounting member is equal to or smaller than the predetermined amplitude, the elastic film member does not come into contact with the displacement restricting portion of the holder. Therefore, when the vibration input to the first mounting member has a low amplitude, the vibration is attenuated by the liquid column resonance generated in the second orifice passage.
In the vibration isolator of the present invention, when the vibration input to the first mounting member is larger than the predetermined amplitude, the hydraulic pressure in the main liquid chamber increases, and the elastic membrane member is deformed by the hydraulic pressure. Thus, the elastic film member comes into contact with the displacement restricting portion of the holder. As a result, the second orifice passage is closed. Therefore, when the vibration input to the first mounting member has a high amplitude, the vibration is damped by the liquid column resonance generated in the first orifice passage.
As described above, in the vibration isolator of the present invention, the elastic film member is deformed according to the magnitude of the amplitude, so that the two kinds of orifice passages are appropriately switched, so that vibrations in different amplitude regions are effectively damped. be able to.
また、本発明の防振装置では、第一取付部材に入力された振動が所定の振幅よりも大きい場合には、主液室の液圧が増加し、その液圧によって弾性膜部材が変形して、弾性膜部材がホルダの変位規制部に当接する。これにより、第二オリフィス通路が閉じられる。したがって、第一取付部材に入力された振動が高振幅である場合には、第一オリフィス通路内に生じる液柱共振によって振動を減衰する。
このように、本発明の防振装置では、振幅の大きさに応じて弾性膜部材が変形することで、二種類のオリフィス通路が適宜に切り替わるため、異なる振幅領域の振動を効果的に減衰することができる。 In the vibration isolator of the present invention, when the vibration input to the first mounting member is equal to or smaller than the predetermined amplitude, the elastic film member does not come into contact with the displacement restricting portion of the holder. Therefore, when the vibration input to the first mounting member has a low amplitude, the vibration is attenuated by the liquid column resonance generated in the second orifice passage.
In the vibration isolator of the present invention, when the vibration input to the first mounting member is larger than the predetermined amplitude, the hydraulic pressure in the main liquid chamber increases, and the elastic membrane member is deformed by the hydraulic pressure. Thus, the elastic film member comes into contact with the displacement restricting portion of the holder. As a result, the second orifice passage is closed. Therefore, when the vibration input to the first mounting member has a high amplitude, the vibration is damped by the liquid column resonance generated in the first orifice passage.
As described above, in the vibration isolator of the present invention, the elastic film member is deformed according to the magnitude of the amplitude, so that the two kinds of orifice passages are appropriately switched, so that vibrations in different amplitude regions are effectively damped. be able to.
また、本発明の防振装置では、第一取付部材に衝撃的な振動が入力された後に、主液室内の液圧が急激に低下すると、弾性膜部材が主液室側に吸引され、弾性膜部材とホルダとの隙間が広がる。これにより、第二オリフィス通路が拡張され、第二オリフィス通路を通じて副液室から主液室に作動液が流れるため、主液室が負圧状態になるのを防ぐことができ、主液室内の作動液に気泡が発生するキャビテーションを防ぐことができる。
Further, in the vibration isolator of the present invention, after the shock vibration is input to the first mounting member, when the liquid pressure in the main liquid chamber suddenly decreases, the elastic film member is sucked to the main liquid chamber side and elastic The gap between the membrane member and the holder widens. As a result, the second orifice passage is expanded, and the working fluid flows from the sub liquid chamber to the main liquid chamber through the second orifice passage, so that the main liquid chamber can be prevented from being in a negative pressure state. Cavitation in which bubbles are generated in the hydraulic fluid can be prevented.
また、本発明の防振装置では、仕切部材の弾性膜部材によって第二オリフィス通路を開閉するため、従来の防振装置から部品点数を増加させることなく、振動の減衰性能を高めることができる。
Moreover, in the vibration isolator of the present invention, the second orifice passage is opened and closed by the elastic membrane member of the partition member, so that the vibration damping performance can be enhanced without increasing the number of parts compared to the conventional vibration isolator.
前記した防振装置において、前記仕切り部材には、前記インシュレータに取り付けられる他のホルダを設け、前記弾性膜部材を前記他のホルダの変位規制部に対して前記副液室側に隙間を空けて配置してもよい。
この構成では、二つのホルダの変位規制部材によって、弾性膜部材の主液室側および福液室側への変位量を抑制することができるため、弾性膜部材の耐久性を向上させることができる。 In the above-described vibration isolator, the partition member is provided with another holder attached to the insulator, and the elastic film member is spaced from the displacement restricting portion of the other holder toward the sub liquid chamber side. You may arrange.
In this configuration, the displacement restricting members of the two holders can suppress the amount of displacement of the elastic film member toward the main liquid chamber side and the liquid liquid chamber side, so that the durability of the elastic film member can be improved. .
この構成では、二つのホルダの変位規制部材によって、弾性膜部材の主液室側および福液室側への変位量を抑制することができるため、弾性膜部材の耐久性を向上させることができる。 In the above-described vibration isolator, the partition member is provided with another holder attached to the insulator, and the elastic film member is spaced from the displacement restricting portion of the other holder toward the sub liquid chamber side. You may arrange.
In this configuration, the displacement restricting members of the two holders can suppress the amount of displacement of the elastic film member toward the main liquid chamber side and the liquid liquid chamber side, so that the durability of the elastic film member can be improved. .
前記した防振装置において、前記弾性膜部材の外周部が前記ホルダに取り付けられるとともに、前記弾性膜部材には穴部を形成し、前記穴部および前記隙間によって前記第二オリフィス通路を形成してもよい。そして、前記第一取付部材に入力された振動が所定の振幅よりも大きい場合には、前記穴部の外周部が前記ホルダの前記変位規制部に当接して、第二オリフィス通路が閉じるように構成することが望ましい。
In the above-described vibration isolator, an outer peripheral portion of the elastic film member is attached to the holder, a hole is formed in the elastic film member, and the second orifice passage is formed by the hole and the gap. Also good. When the vibration input to the first mounting member is larger than a predetermined amplitude, the outer peripheral portion of the hole is in contact with the displacement restricting portion of the holder so that the second orifice passage is closed. It is desirable to configure.
この構成では、弾性膜部材の穴部の外周部は変形し易い部位であり、振幅の大きさに応じて弾性膜部材が変形し易くなるため、二種類のオリフィス通路を確実に切り替えて、異なる振幅領域の振動を効果的に減衰することができる。また、主液室内の液圧が急激に低下した場合にも、弾性膜部材が確実に変形するため、主液室内の作動液に気泡が発生するキャビテーションを効果的に防ぐことができる。
In this configuration, the outer peripheral portion of the hole portion of the elastic membrane member is a portion that is easily deformed, and the elastic membrane member is likely to be deformed according to the magnitude of the amplitude. The vibration in the amplitude region can be effectively damped. Further, even when the hydraulic pressure in the main liquid chamber suddenly decreases, the elastic membrane member is reliably deformed, so that cavitation in which bubbles are generated in the working fluid in the main liquid chamber can be effectively prevented.
前記した防振装置において、前記ホルダに形成された突起部を前記穴部に挿入した場合には、例えば、突起部の外径や高さを変更するか、穴部の内径を変更することで、第二オリフィス通路の共振特性を調整することができる。
In the above-described vibration isolator, when the protrusion formed on the holder is inserted into the hole, for example, the outer diameter or height of the protrusion is changed, or the inner diameter of the hole is changed. The resonance characteristics of the second orifice passage can be adjusted.
前記した防振装置において、前記弾性膜部材は、弾性膜部と、前記弾性膜部に形成された穴部と、前記弾性膜部の外周縁部に形成された外周部と、を備えていることが好ましい。この構成では、前記弾性膜部の前記穴部側の部位の厚さを前記外周部側の部位の厚さよりも大きく形成することで、弾性膜部材のばね特性を調整することができる。
In the above-described vibration isolator, the elastic film member includes an elastic film part, a hole part formed in the elastic film part, and an outer peripheral part formed on an outer peripheral edge part of the elastic film part. It is preferable. In this configuration, the spring characteristic of the elastic membrane member can be adjusted by forming the thickness of the portion on the hole portion side of the elastic membrane portion larger than the thickness of the portion on the outer peripheral portion side.
本発明の防振装置では、二種類のオリフィス通路を備え、仕切部材の弾性膜部材によって一方のオリフィス通路を開閉するので、異なる周波数領域の振動を効果的に減衰することができるとともに、部品点数を増加することなく、振動の減衰性能を高めることができる。また、本発明の防振装置では、主液室内の液圧が急激に低下したときに、第二オリフィス通路が拡張されることで、主液室が負圧状態になるのを防ぐことができるため、主液室内の作動液に気泡が発生するキャビテーションを防ぐことができる。
In the vibration isolator of the present invention, two kinds of orifice passages are provided, and one orifice passage is opened and closed by the elastic membrane member of the partition member. Therefore, vibrations in different frequency regions can be effectively damped and the number of parts can be reduced. The vibration damping performance can be improved without increasing the frequency. Further, in the vibration isolator of the present invention, when the hydraulic pressure in the main liquid chamber suddenly decreases, the second orifice passage is expanded, thereby preventing the main liquid chamber from entering a negative pressure state. Therefore, cavitation in which bubbles are generated in the hydraulic fluid in the main liquid chamber can be prevented.
本発明の実施形態について、適宜図面を参照しながら詳細に説明する。
以下の説明では、本実施形態の防振装置の全体構成について説明した後に、仕切部材について詳細に説明する。 Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, after describing the overall configuration of the vibration isolator of the present embodiment, the partition member will be described in detail.
以下の説明では、本実施形態の防振装置の全体構成について説明した後に、仕切部材について詳細に説明する。 Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, after describing the overall configuration of the vibration isolator of the present embodiment, the partition member will be described in detail.
本実施形態の防振装置1は、図1に示すように、自動車等のエンジン(特許請求の範囲における「振動部材」)と、車体(特許請求の範囲における「非振動部材」)との間に介設される液体封入式のエンジンマウントである。
なお、振動部材とは、振動の発生源(例えば、エンジンやモータ等)のことである。また、非振動部材とは、振動部材の振動を伝えたくない部材(例えば、車体等)のことである。 As shown in FIG. 1, the vibration isolator 1 of the present embodiment is between an engine such as an automobile (“vibrating member” in claims) and a vehicle body (“non-vibrating member” in claims). This is a liquid-filled engine mount interposed between the two.
The vibration member is a vibration generation source (for example, an engine or a motor). The non-vibrating member is a member (for example, a vehicle body or the like) that does not want to transmit vibration of the vibrating member.
なお、振動部材とは、振動の発生源(例えば、エンジンやモータ等)のことである。また、非振動部材とは、振動部材の振動を伝えたくない部材(例えば、車体等)のことである。 As shown in FIG. 1, the vibration isolator 1 of the present embodiment is between an engine such as an automobile (“vibrating member” in claims) and a vehicle body (“non-vibrating member” in claims). This is a liquid-filled engine mount interposed between the two.
The vibration member is a vibration generation source (for example, an engine or a motor). The non-vibrating member is a member (for example, a vehicle body or the like) that does not want to transmit vibration of the vibrating member.
防振装置1は、エンジンに取り付けられる第一取付部材10と、車体に取り付けられる第二取付部材20と、を備えている。また、防振装置1は、第一取付部材10と第二取付部材20との間に介設されたインシュレータ30と、インシュレータ30の下部に取り付けられた仕切部材40およびダイヤフラム50と、を備えている。
The vibration isolator 1 includes a first attachment member 10 attached to the engine and a second attachment member 20 attached to the vehicle body. The vibration isolator 1 includes an insulator 30 interposed between the first attachment member 10 and the second attachment member 20, and a partition member 40 and a diaphragm 50 attached to the lower portion of the insulator 30. Yes.
第一取付部材10は、インシュレータ30の上部にインサート成形された金属製の部材である。
第一取付部材10の略全体がインシュレータ30で覆われており、第一取付部材10の上端部が外部に露出している。
第一取付部材10の上端面の中心部には、ねじ穴11が形成されており、ねじ穴11には第一取付部材10をエンジン側のブラケット(図示せず)に取り付けるためのボルト(図示せず)が螺合される。
第二取付部材20は、円筒状の金属製の部材である。第二取付部材20の内周面にインシュレータ30の下部が加硫接着されている。 The first mountingmember 10 is a metal member that is insert-molded on the top of the insulator 30.
Substantially the entire first mountingmember 10 is covered with the insulator 30, and the upper end of the first mounting member 10 is exposed to the outside.
Ascrew hole 11 is formed at the center of the upper end surface of the first mounting member 10, and a bolt (not shown) for mounting the first mounting member 10 to a bracket (not shown) on the engine side is formed in the screw hole 11. (Not shown) are screwed together.
The second mountingmember 20 is a cylindrical metal member. The lower part of the insulator 30 is vulcanized and bonded to the inner peripheral surface of the second mounting member 20.
第一取付部材10の略全体がインシュレータ30で覆われており、第一取付部材10の上端部が外部に露出している。
第一取付部材10の上端面の中心部には、ねじ穴11が形成されており、ねじ穴11には第一取付部材10をエンジン側のブラケット(図示せず)に取り付けるためのボルト(図示せず)が螺合される。
第二取付部材20は、円筒状の金属製の部材である。第二取付部材20の内周面にインシュレータ30の下部が加硫接着されている。 The first mounting
Substantially the entire first mounting
A
The second mounting
インシュレータ30は、略円錐台形状に形成されたゴム製の弾性部材である。インシュレータ30の下部には、下方に開口した空間(凹部)が形成されている。
インシュレータ30の上部には、第一取付部材10がインサート成形されている。
インシュレータ30の下部は、第二取付部材20の内周面に沿って円筒状に形成されており、第二取付部材20の内周面に加硫接着されている。 Theinsulator 30 is a rubber elastic member formed in a substantially truncated cone shape. A space (concave portion) opened downward is formed in the lower portion of the insulator 30.
A first mountingmember 10 is insert-molded on the top of the insulator 30.
The lower part of theinsulator 30 is formed in a cylindrical shape along the inner peripheral surface of the second mounting member 20, and is vulcanized and bonded to the inner peripheral surface of the second mounting member 20.
インシュレータ30の上部には、第一取付部材10がインサート成形されている。
インシュレータ30の下部は、第二取付部材20の内周面に沿って円筒状に形成されており、第二取付部材20の内周面に加硫接着されている。 The
A first mounting
The lower part of the
インシュレータ30の下部の内部には、仕切部材40が取り付けられている。この仕切部材40によってインシュレータ30の開口部が塞がれている。
仕切部材40の上方には、主液室1aが形成されている。主液室1aは、インシュレータ30の内面と、仕切部材40の上面とによって囲まれた空間であり、非圧縮性の作動液が封入されている。 Apartition member 40 is attached inside the lower portion of the insulator 30. The partition member 40 closes the opening of the insulator 30.
A mainliquid chamber 1 a is formed above the partition member 40. The main liquid chamber 1a is a space surrounded by the inner surface of the insulator 30 and the upper surface of the partition member 40, and is filled with an incompressible hydraulic fluid.
仕切部材40の上方には、主液室1aが形成されている。主液室1aは、インシュレータ30の内面と、仕切部材40の上面とによって囲まれた空間であり、非圧縮性の作動液が封入されている。 A
A main
仕切部材40の下側には、ダイヤフラム50が設けられている。ダイヤフラム50は、ゴム製の膜51と、金属製の円筒状の枠部材52と、を備えている。膜51の外周面は、枠部材52の内周面に加硫接着されている。
枠部材52は、第二取付部材20内に挿入されており、第二取付部材20の下端縁部をかしめることで、枠部材52が第二取付部材20内に固定されている。
仕切部材40とダイヤフラム50の膜51との間には、副液室1bが形成されている。副液室1bは、仕切部材40の下面およびダイヤフラム50の膜51の上面によって囲まれた空間であり、非圧縮性の作動液が封入されている。 Adiaphragm 50 is provided below the partition member 40. The diaphragm 50 includes a rubber film 51 and a metal cylindrical frame member 52. The outer peripheral surface of the film 51 is vulcanized and bonded to the inner peripheral surface of the frame member 52.
Theframe member 52 is inserted into the second mounting member 20, and the frame member 52 is fixed in the second mounting member 20 by caulking the lower edge of the second mounting member 20.
Asub liquid chamber 1 b is formed between the partition member 40 and the membrane 51 of the diaphragm 50. The auxiliary liquid chamber 1b is a space surrounded by the lower surface of the partition member 40 and the upper surface of the membrane 51 of the diaphragm 50, and incompressible hydraulic fluid is enclosed therein.
枠部材52は、第二取付部材20内に挿入されており、第二取付部材20の下端縁部をかしめることで、枠部材52が第二取付部材20内に固定されている。
仕切部材40とダイヤフラム50の膜51との間には、副液室1bが形成されている。副液室1bは、仕切部材40の下面およびダイヤフラム50の膜51の上面によって囲まれた空間であり、非圧縮性の作動液が封入されている。 A
The
A
次に、本実施形態の仕切部材40について詳細に説明する。
仕切部材40は、下部ホルダ41と、下部ホルダ41の上面に取り付けられた上部ホルダ42と、下部ホルダ41と上部ホルダ42との間に挟まれた弾性膜部材43と、を備えている。 Next, thepartition member 40 of this embodiment will be described in detail.
Thepartition member 40 includes a lower holder 41, an upper holder 42 attached to the upper surface of the lower holder 41, and an elastic film member 43 sandwiched between the lower holder 41 and the upper holder 42.
仕切部材40は、下部ホルダ41と、下部ホルダ41の上面に取り付けられた上部ホルダ42と、下部ホルダ41と上部ホルダ42との間に挟まれた弾性膜部材43と、を備えている。 Next, the
The
下部ホルダ41は、樹脂製の部材であり、図2(c)に示すように、外周形状が円形に形成されている。下部ホルダ41の外周面には、第一オリフィス通路45となる凹溝41aが形成されている。凹溝41aの一端部は下部ホルダ41の下面に開口し、凹溝41aの他端部は下部ホルダ41の上面に開口している。
The lower holder 41 is a resin member, and as shown in FIG. A concave groove 41 a that becomes the first orifice passage 45 is formed on the outer peripheral surface of the lower holder 41. One end of the recessed groove 41 a opens on the lower surface of the lower holder 41, and the other end of the recessed groove 41 a opens on the upper surface of the lower holder 41.
下部ホルダ41の上面の中央部には、円形の凹部41bが形成されている。凹部41bには弾性膜部材43(図1参照)が収容される。
凹部41bの底部41cの中央部の周囲には、四つの連通穴41eが形成されている。各連通穴41eは、凹部41bの底部41cを上下方向に貫通している。
凹部41bの底部41cにおいて、中央部および各連通穴41eの間の領域は、弾性膜部材43の変位を規制する変位規制部41gとなっている。 Acircular recess 41 b is formed at the center of the upper surface of the lower holder 41. An elastic membrane member 43 (see FIG. 1) is accommodated in the recess 41b.
Fourcommunication holes 41e are formed around the center of the bottom 41c of the recess 41b. Each communication hole 41e penetrates the bottom 41c of the recess 41b in the vertical direction.
In the bottom 41c of therecess 41b, a region between the central portion and each communication hole 41e is a displacement restricting portion 41g that restricts the displacement of the elastic film member 43.
凹部41bの底部41cの中央部の周囲には、四つの連通穴41eが形成されている。各連通穴41eは、凹部41bの底部41cを上下方向に貫通している。
凹部41bの底部41cにおいて、中央部および各連通穴41eの間の領域は、弾性膜部材43の変位を規制する変位規制部41gとなっている。 A
Four
In the bottom 41c of the
上部ホルダ42は、樹脂製の部材であり、図2(a)に示すように、円板状に形成されている。上部ホルダ42は、図1に示すように、下部ホルダ41の上面に重ね合わされている。
本実施形態では、下部ホルダ41の上面に形成された係合突起部41fを上部ホルダ42の係合穴42fに嵌め合わせることで、上部ホルダ42が下部ホルダ41の上面に固定されている。 Theupper holder 42 is a resin member, and is formed in a disk shape as shown in FIG. As shown in FIG. 1, the upper holder 42 is overlaid on the upper surface of the lower holder 41.
In the present embodiment, theupper holder 42 is fixed to the upper surface of the lower holder 41 by fitting the engagement protrusions 41 f formed on the upper surface of the lower holder 41 into the engagement holes 42 f of the upper holder 42.
本実施形態では、下部ホルダ41の上面に形成された係合突起部41fを上部ホルダ42の係合穴42fに嵌め合わせることで、上部ホルダ42が下部ホルダ41の上面に固定されている。 The
In the present embodiment, the
上部ホルダ42の中央部には、図2(a)に示すように、第一連通穴42dが上下方向に貫通している。また、上部ホルダ42において、第一連通穴42dの周囲には、四つの第二連通穴42eが上下方向に貫通している。
上部ホルダ42において、各連通穴42d,42eの間の領域は、弾性膜部材43の変位を規制する変位規制部42gとなっている。
上部ホルダ42の各連通穴42d,42eは、図1に示すように、下部ホルダ41の凹部41b内に連通している。
上部ホルダ42において、各第二連通穴42eの外側には、開口部42aが上下方向に貫通している(図2(a)参照)。開口部42aは、下部ホルダ41の凹溝41aの一端部に連通している。 As shown in FIG. 2A, a first series of throughholes 42d penetrates the central portion of the upper holder 42 in the vertical direction. Further, in the upper holder 42, four second communication holes 42e penetrate in the vertical direction around the first series of through holes 42d.
In theupper holder 42, a region between the communication holes 42 d and 42 e is a displacement restricting portion 42 g that restricts the displacement of the elastic film member 43.
As shown in FIG. 1, the communication holes 42 d and 42 e of theupper holder 42 communicate with the recess 41 b of the lower holder 41.
In theupper holder 42, an opening 42a penetrates in the vertical direction outside each second communication hole 42e (see FIG. 2A). The opening 42 a communicates with one end of the concave groove 41 a of the lower holder 41.
上部ホルダ42において、各連通穴42d,42eの間の領域は、弾性膜部材43の変位を規制する変位規制部42gとなっている。
上部ホルダ42の各連通穴42d,42eは、図1に示すように、下部ホルダ41の凹部41b内に連通している。
上部ホルダ42において、各第二連通穴42eの外側には、開口部42aが上下方向に貫通している(図2(a)参照)。開口部42aは、下部ホルダ41の凹溝41aの一端部に連通している。 As shown in FIG. 2A, a first series of through
In the
As shown in FIG. 1, the communication holes 42 d and 42 e of the
In the
弾性膜部材43は、ゴム製の部材であり、図2(b)に示すように、円板状の弾性膜部43bと、弾性膜部43bの外周縁部に形成された固定部43aと、弾性膜部43bの中央部に形成された穴部43cと、を備えている。
弾性膜部材43は、図3(a)に示すように、下部ホルダ41の凹部41b内に収容されている。弾性膜部43bは、上部ホルダ42の下面42bと下部ホルダ41の凹部41bの底面41cとの間に配置されている。 Theelastic film member 43 is a rubber member, and as shown in FIG. 2B, a disk-shaped elastic film part 43b, a fixing part 43a formed on the outer peripheral edge of the elastic film part 43b, And a hole 43c formed at the center of the elastic film part 43b.
Theelastic membrane member 43 is accommodated in the recess 41b of the lower holder 41 as shown in FIG. The elastic film portion 43 b is disposed between the lower surface 42 b of the upper holder 42 and the bottom surface 41 c of the concave portion 41 b of the lower holder 41.
弾性膜部材43は、図3(a)に示すように、下部ホルダ41の凹部41b内に収容されている。弾性膜部43bは、上部ホルダ42の下面42bと下部ホルダ41の凹部41bの底面41cとの間に配置されている。 The
The
固定部43aは、弾性膜部43bを囲んでいる円筒状の部位であり、弾性膜部43bの上面および下面に対して上下方向に突出している。
固定部43aは上部ホルダ42と下部ホルダ41とに挟まれている。上部ホルダ42と下部ホルダ41とによって固定部43aを挟むことで、弾性膜部材43が上部ホルダ42および下部ホルダ41に固定されている。
弾性膜部43bの上面と上部ホルダ42の下面42bとは離間し、弾性膜部43bの下面と下部ホルダ41の凹部41bの底面41cとは離間している。 The fixingportion 43a is a cylindrical portion surrounding the elastic film portion 43b, and protrudes in the vertical direction with respect to the upper surface and the lower surface of the elastic film portion 43b.
The fixingportion 43 a is sandwiched between the upper holder 42 and the lower holder 41. The elastic film member 43 is fixed to the upper holder 42 and the lower holder 41 by sandwiching the fixing portion 43 a between the upper holder 42 and the lower holder 41.
The upper surface of theelastic film portion 43b and the lower surface 42b of the upper holder 42 are separated from each other, and the lower surface of the elastic film portion 43b and the bottom surface 41c of the concave portion 41b of the lower holder 41 are separated from each other.
固定部43aは上部ホルダ42と下部ホルダ41とに挟まれている。上部ホルダ42と下部ホルダ41とによって固定部43aを挟むことで、弾性膜部材43が上部ホルダ42および下部ホルダ41に固定されている。
弾性膜部43bの上面と上部ホルダ42の下面42bとは離間し、弾性膜部43bの下面と下部ホルダ41の凹部41bの底面41cとは離間している。 The fixing
The fixing
The upper surface of the
穴部43cは、弾性膜部43bの中央部を上下方向に貫通している(図2(b)参照)。穴部43cの内部は、第二オリフィス通路46となる部位である。
The hole 43c penetrates the central part of the elastic film part 43b in the vertical direction (see FIG. 2B). The inside of the hole 43 c is a part that becomes the second orifice passage 46.
弾性膜部43bは、固定部43aが支持されるため、弾性膜部43bの中央の穴部43cの外周部は、弾性膜部43bで最も変形し易い(最も撓み易い)部位となっている。そして、穴部43cの外周部には上下方向に突出した円筒状の内周部43dが形成されている(図2(b)参照)。このように、弾性膜部43bは、穴部43c側の部位の厚さが固定部43a側の部位の厚さよりも大きく形成されている。すなわち、弾性膜部43bは、穴部43c側の部位の重量が固定部43a側の部位の重量よりも大きくなっている。
Since the elastic film part 43b supports the fixing part 43a, the outer peripheral part of the central hole part 43c of the elastic film part 43b is a part that is most easily deformed (easily bent) by the elastic film part 43b. A cylindrical inner peripheral portion 43d that protrudes in the vertical direction is formed on the outer peripheral portion of the hole portion 43c (see FIG. 2B). Thus, the elastic film part 43b is formed so that the thickness of the part on the hole part 43c side is larger than the thickness of the part on the fixing part 43a side. That is, in the elastic film part 43b, the weight of the part on the hole part 43c side is larger than the weight of the part on the fixed part 43a side.
内周部43dの下面43eは、下部ホルダ41の変位規制部41gに対して上側(主液室1a側)に隙間を空けて配置されている。そして、弾性膜部43bの内周部43dと下部ホルダ41の変位規制部41gとの間には、第二オリフィス通路46となる円環状の隙間が形成されている。
また、内周部43dの上面43fは、上部ホルダ42の変位規制部42gに対して下側(副液室1b側)に隙間を空けて配置されている。そして、弾性膜部43bの内周部43dと上部ホルダ42の変位規制部42gとの間にも円環状の隙間が形成されている。 Thelower surface 43e of the inner peripheral portion 43d is disposed with a gap on the upper side (main liquid chamber 1a side) with respect to the displacement restricting portion 41g of the lower holder 41. An annular gap serving as the second orifice passage 46 is formed between the inner peripheral portion 43 d of the elastic film portion 43 b and the displacement restricting portion 41 g of the lower holder 41.
Further, theupper surface 43f of the inner peripheral portion 43d is disposed with a gap on the lower side (sub liquid chamber 1b side) with respect to the displacement restricting portion 42g of the upper holder 42. An annular gap is also formed between the inner peripheral portion 43 d of the elastic film portion 43 b and the displacement restricting portion 42 g of the upper holder 42.
また、内周部43dの上面43fは、上部ホルダ42の変位規制部42gに対して下側(副液室1b側)に隙間を空けて配置されている。そして、弾性膜部43bの内周部43dと上部ホルダ42の変位規制部42gとの間にも円環状の隙間が形成されている。 The
Further, the
防振装置1では、図1に示すように、下部ホルダ41の外周面はインシュレータ30の下端部によって覆われており、下部ホルダ41の凹溝41aの外側の開口部がインシュレータ30によって塞がれている。
そして、上部ホルダ42の開口部42aおよび下部ホルダ41の凹溝41aによって第一オリフィス通路45が形成されている。第一オリフィス通路45は、主液室1aと副液室1bとを連通させる流路である。 In the vibration isolator 1, as shown in FIG. 1, the outer peripheral surface of thelower holder 41 is covered by the lower end portion of the insulator 30, and the opening outside the concave groove 41 a of the lower holder 41 is closed by the insulator 30. ing.
Afirst orifice passage 45 is formed by the opening 42 a of the upper holder 42 and the concave groove 41 a of the lower holder 41. The 1st orifice channel | path 45 is a flow path which connects the main liquid chamber 1a and the subliquid chamber 1b.
そして、上部ホルダ42の開口部42aおよび下部ホルダ41の凹溝41aによって第一オリフィス通路45が形成されている。第一オリフィス通路45は、主液室1aと副液室1bとを連通させる流路である。 In the vibration isolator 1, as shown in FIG. 1, the outer peripheral surface of the
A
また、図3(a)に示すように、穴部43cと、内周部43dの下面43eと下部ホルダ41の変位規制部41gとの隙間とによって、第二オリフィス通路46が形成されている。第二オリフィス通路46は、主液室1aと副液室1bとを連通させる流路である。
第二オリフィス通路46は、上部が円筒状に形成され、中間部は円環状(フランジ状)に形成されている。
第二オリフィス通路46は、上部ホルダ42の各連通穴42d,42eを通じて、主液室1aに連通するとともに、下部ホルダ41の各連通穴41eを通じて、副液室1bに連通している。 Further, as shown in FIG. 3A, asecond orifice passage 46 is formed by the hole 43c and a gap between the lower surface 43e of the inner peripheral portion 43d and the displacement restricting portion 41g of the lower holder 41. The second orifice passage 46 is a flow path for communicating the main liquid chamber 1a and the sub liquid chamber 1b.
Thesecond orifice passage 46 has an upper portion formed in a cylindrical shape and an intermediate portion formed in an annular shape (flange shape).
Thesecond orifice passage 46 communicates with the main liquid chamber 1a through the communication holes 42d and 42e of the upper holder 42 and also communicates with the sub liquid chamber 1b through the communication holes 41e of the lower holder 41.
第二オリフィス通路46は、上部が円筒状に形成され、中間部は円環状(フランジ状)に形成されている。
第二オリフィス通路46は、上部ホルダ42の各連通穴42d,42eを通じて、主液室1aに連通するとともに、下部ホルダ41の各連通穴41eを通じて、副液室1bに連通している。 Further, as shown in FIG. 3A, a
The
The
防振装置1では、図1に示すように、エンジンから第一取付部材10に入力された振動をインシュレータ30の弾性変形によって吸収するように構成されている。
また、防振装置1では、振動によってインシュレータ30が弾性変形すると、第一オリフィス通路45および第二オリフィス通路46を作動液が流通する。 As shown in FIG. 1, the vibration isolator 1 is configured to absorb vibration input from the engine to the first mountingmember 10 by elastic deformation of the insulator 30.
In the vibration isolator 1, when theinsulator 30 is elastically deformed by vibration, the working fluid flows through the first orifice passage 45 and the second orifice passage 46.
また、防振装置1では、振動によってインシュレータ30が弾性変形すると、第一オリフィス通路45および第二オリフィス通路46を作動液が流通する。 As shown in FIG. 1, the vibration isolator 1 is configured to absorb vibration input from the engine to the first mounting
In the vibration isolator 1, when the
防振装置1では、第一取付部材10をエンジンに取り付けるとともに、第二取付部材20を車体に取り付けた初期状態では、弾性膜部43bの内周部43dと下部ホルダ41の変位規制部41gとの間に第二オリフィス通路46となる隙間が形成されている。また、弾性膜部43bの内周部43dと上部ホルダ42の変位規制部42gとの間に隙間が形成されている。
In the vibration isolator 1, in the initial state where the first attachment member 10 is attached to the engine and the second attachment member 20 is attached to the vehicle body, the inner peripheral portion 43d of the elastic film portion 43b and the displacement restricting portion 41g of the lower holder 41 A gap serving as the second orifice passage 46 is formed therebetween. Further, a gap is formed between the inner peripheral portion 43 d of the elastic film portion 43 b and the displacement restricting portion 42 g of the upper holder 42.
防振装置1では、第一取付部材10に入力された振動が所定の振幅以下である場合には、主に第二オリフィス通路46内に生じる液柱共振によって振動が減衰される。
なお、所定の振幅以下の振動とは、アイドリング運転時などに生じる低振幅の振動である。 In the vibration isolator 1, when the vibration input to the first mountingmember 10 has a predetermined amplitude or less, the vibration is attenuated mainly by liquid column resonance that occurs in the second orifice passage 46.
In addition, the vibration below a predetermined amplitude is a low-amplitude vibration that occurs during idling.
なお、所定の振幅以下の振動とは、アイドリング運転時などに生じる低振幅の振動である。 In the vibration isolator 1, when the vibration input to the first mounting
In addition, the vibration below a predetermined amplitude is a low-amplitude vibration that occurs during idling.
また、防振装置1では、第一取付部材10に入力された振動が所定の振幅よりも大きい場合には、主液室1a内の液圧が大きくなる。そして、主液室1a内の液圧によって、図3(b)に示すように、弾性膜部材43の弾性膜部43bが下方に向けて弾性変形し、弾性膜部43bの穴部43c側の部位が下方に向けて撓んだ状態となる。
なお、所定の振幅よりも大きい振動とは、悪路走行時などに生じる高振幅の振動である。 In the vibration isolator 1, when the vibration input to the first mountingmember 10 is larger than a predetermined amplitude, the hydraulic pressure in the main liquid chamber 1a increases. Then, as shown in FIG. 3B, the elastic film part 43b of the elastic film member 43 is elastically deformed downward due to the hydraulic pressure in the main liquid chamber 1a, and the elastic film part 43b on the hole 43c side is elastically deformed downward. The part is bent downward.
The vibration larger than the predetermined amplitude is a high-amplitude vibration that occurs when traveling on a rough road.
なお、所定の振幅よりも大きい振動とは、悪路走行時などに生じる高振幅の振動である。 In the vibration isolator 1, when the vibration input to the first mounting
The vibration larger than the predetermined amplitude is a high-amplitude vibration that occurs when traveling on a rough road.
弾性膜部43bが下方に向けて弾性変形することで、内周部43dが下部ホルダ41の変位規制部41gに当接し、内周部43dの下面43eと下部ホルダ41の変位規制部41gとの隙間が塞がれる。
これにより、第二オリフィス通路46が閉じた状態となるため、第一オリフィス通路45のみに作動液が流通し、第一オリフィス通路45内に生じる液柱共振によって振動が減衰される。 When theelastic film portion 43b is elastically deformed downward, the inner peripheral portion 43d abuts on the displacement restricting portion 41g of the lower holder 41, and the lower surface 43e of the inner peripheral portion 43d and the displacement restricting portion 41g of the lower holder 41 are in contact with each other. The gap is blocked.
As a result, thesecond orifice passage 46 is closed, so that the working fluid flows only through the first orifice passage 45, and the vibration is attenuated by the liquid column resonance generated in the first orifice passage 45.
これにより、第二オリフィス通路46が閉じた状態となるため、第一オリフィス通路45のみに作動液が流通し、第一オリフィス通路45内に生じる液柱共振によって振動が減衰される。 When the
As a result, the
また、防振装置1では、第一取付部材10(図1参照)に衝撃的な振動が入力された後に、主液室1a内の液圧が急激に低下した場合には、図4に示すように、弾性膜部材43の弾性膜部43bが主液室1a側に吸引される。
Further, in the vibration isolator 1, when shock pressure is input to the first mounting member 10 (see FIG. 1) and the hydraulic pressure in the main liquid chamber 1a is suddenly reduced, the vibration isolator 1 is shown in FIG. As described above, the elastic film portion 43b of the elastic film member 43 is sucked toward the main liquid chamber 1a.
これにより、弾性膜部43bは上方に向けて弾性変形し、弾性膜部43bの穴部43c側の部位が上方に向けて撓んだ状態となり、弾性膜部材43の内周部43dの上面43fが上部ホルダ42の変位規制部42gに当接する。これにより、弾性膜部材43の内周部43dの下面43eと下部ホルダ41の変位規制部41gとの隙間が広がり、第二オリフィス通路46が拡張される。
そして、第二オリフィス通路46を通じて副液室1bから主液室1aに作動液が流れることで、主液室1aが負圧状態になるのを防ぐことができ、主液室1a内の作動液に気泡が発生するキャビテーションを防ぐことができる。 As a result, theelastic film portion 43b is elastically deformed upward, and the portion of the elastic film portion 43b on the hole 43c side is bent upward, and the upper surface 43f of the inner peripheral portion 43d of the elastic film member 43 is formed. Comes into contact with the displacement restricting portion 42g of the upper holder 42. Thereby, the clearance gap between the lower surface 43e of the inner peripheral part 43d of the elastic film member 43 and the displacement control part 41g of the lower holder 41 spreads, and the 2nd orifice channel | path 46 is expanded.
Then, the hydraulic fluid flows from the secondaryliquid chamber 1b to the main liquid chamber 1a through the second orifice passage 46, so that the main liquid chamber 1a can be prevented from being in a negative pressure state. The hydraulic fluid in the main liquid chamber 1a It is possible to prevent cavitation in which bubbles are generated.
そして、第二オリフィス通路46を通じて副液室1bから主液室1aに作動液が流れることで、主液室1aが負圧状態になるのを防ぐことができ、主液室1a内の作動液に気泡が発生するキャビテーションを防ぐことができる。 As a result, the
Then, the hydraulic fluid flows from the secondary
以上のような防振装置1では、図3(a)に示すように、アイドリング運転時などに低振幅の振動が入力された場合には、第二オリフィス通路46内に生じる液柱共振によって振動を減衰する。
また、悪路走行時などに高振幅の振動が入力された場合には、図3(b)に示すように、第一オリフィス通路45内に生じる液柱共振によって振動を減衰する。
このように、防振装置1では、振動の振幅の大きさに応じて弾性膜部材43が変形することで、二種類のオリフィス通路が適宜に切り替わるため、異なる振幅領域の振動を効果的に減衰することができる。 In the vibration isolator 1 as described above, as shown in FIG. 3A, when low-amplitude vibration is input during idling operation, vibration is caused by liquid column resonance generated in thesecond orifice passage 46. Attenuate.
When high amplitude vibration is input when traveling on a rough road or the like, the vibration is attenuated by liquid column resonance generated in thefirst orifice passage 45 as shown in FIG.
As described above, in the vibration isolator 1, theelastic film member 43 is deformed according to the magnitude of the vibration amplitude, so that the two kinds of orifice passages are appropriately switched. Therefore, vibrations in different amplitude regions are effectively attenuated. can do.
また、悪路走行時などに高振幅の振動が入力された場合には、図3(b)に示すように、第一オリフィス通路45内に生じる液柱共振によって振動を減衰する。
このように、防振装置1では、振動の振幅の大きさに応じて弾性膜部材43が変形することで、二種類のオリフィス通路が適宜に切り替わるため、異なる振幅領域の振動を効果的に減衰することができる。 In the vibration isolator 1 as described above, as shown in FIG. 3A, when low-amplitude vibration is input during idling operation, vibration is caused by liquid column resonance generated in the
When high amplitude vibration is input when traveling on a rough road or the like, the vibration is attenuated by liquid column resonance generated in the
As described above, in the vibration isolator 1, the
また、防振装置1では、車両が段差を乗り越えた場合など、第一取付部材10に衝撃的な振動が入力された後に、主液室1a内の液圧が急激に低下し、図4に示すように、第二オリフィス通路46が拡張される。これにより、第二オリフィス通路46を通じて副液室1bから主液室1aに作動液が流れるため、主液室1aが負圧状態になるのを防ぐことができ、主液室1a内の作動液に気泡が発生するキャビテーションを防ぐことができる。
Further, in the vibration isolator 1, the hydraulic pressure in the main liquid chamber 1a rapidly decreases after shocking vibration is input to the first mounting member 10, such as when the vehicle goes over a step, and FIG. As shown, the second orifice passage 46 is expanded. As a result, since the working fluid flows from the secondary fluid chamber 1b to the main fluid chamber 1a through the second orifice passage 46, the main fluid chamber 1a can be prevented from being in a negative pressure state, and the working fluid in the main fluid chamber 1a can be prevented. It is possible to prevent cavitation in which bubbles are generated.
また、図3(b)および図4に示すように、弾性膜部材43の内周部43dは、弾性膜部材43の変形し易い部位に形成されているため、弾性膜部材43の変形によって二種類のオリフィス通路45,46を確実に切り替えて、異なる振幅領域の振動を効果的に減衰することができる。また、主液室1a内の液圧が急激に低下した場合にも、弾性膜部材43が確実に変形するため、主液室1a内の作動液に気泡が発生するキャビテーションを効果的に防ぐことができる。
Further, as shown in FIGS. 3B and 4, the inner peripheral portion 43 d of the elastic film member 43 is formed at a portion where the elastic film member 43 is easily deformed. The kinds of orifice passages 45 and 46 can be switched reliably to effectively attenuate vibrations in different amplitude regions. Further, even when the hydraulic pressure in the main liquid chamber 1a suddenly decreases, the elastic membrane member 43 is reliably deformed, so that cavitation in which bubbles are generated in the working fluid in the main liquid chamber 1a is effectively prevented. Can do.
また、防振装置1では、仕切部材40の弾性膜部材43によって第二オリフィス通路46を開閉するため、従来の防振装置から部品点数を増加することなく、振動の減衰性能を高めることができる。
Further, in the vibration isolator 1, since the second orifice passage 46 is opened and closed by the elastic film member 43 of the partition member 40, the vibration damping performance can be enhanced without increasing the number of parts compared to the conventional vibration isolator. .
また、防振装置1では、両ホルダ41,42の変位規制部材41g,42gによって、弾性膜部材43の変位量が抑制されているため、弾性膜部材43の耐久性を向上させることができる。
Moreover, in the vibration isolator 1, since the displacement amount of the elastic film member 43 is suppressed by the displacement restricting members 41g and 42g of the holders 41 and 42, the durability of the elastic film member 43 can be improved.
また、防振装置1では、弾性膜部材43に内周部43dが形成されており、内周部43dの厚さを調整することで、弾性膜部材43のばね特性を調整することができる。
Moreover, in the vibration isolator 1, the inner peripheral part 43d is formed in the elastic film member 43, and the spring characteristic of the elastic film member 43 can be adjusted by adjusting the thickness of the inner peripheral part 43d.
以上、本発明の実施形態について説明したが、本発明は前記実施形態に限定されることなく、その趣旨を逸脱しない範囲で適宜に変更が可能である。
例えば、図5に示すように、下部ホルダ41の凹部41bの底面の中央部に柱状の突起部41dを上方に向けて突出させてもよい。この突起部41dを弾性膜部材43の弾性膜部43bの穴部43cに挿入することで、下部ホルダ41に対して弾性膜部材43を位置決めすることができる。
また、穴部43cの内周面と、突起部41dの外周面との間には、第二オリフィス通路46となる円筒状の隙間が形成される。そして、突起部41dの外径や高さを変更したり、中央穴42gの内径を変更したりすることで、第二オリフィス通路46の共振特性を調整することができる。 The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, as shown in FIG. 5, acolumnar protrusion 41 d may protrude upward at the center of the bottom surface of the recess 41 b of the lower holder 41. By inserting the protruding portion 41 d into the hole 43 c of the elastic film portion 43 b of the elastic film member 43, the elastic film member 43 can be positioned with respect to the lower holder 41.
In addition, a cylindrical gap serving as thesecond orifice passage 46 is formed between the inner peripheral surface of the hole 43c and the outer peripheral surface of the protrusion 41d. And the resonance characteristic of the 2nd orifice channel | path 46 can be adjusted by changing the outer diameter and height of the projection part 41d, or changing the internal diameter of the center hole 42g.
例えば、図5に示すように、下部ホルダ41の凹部41bの底面の中央部に柱状の突起部41dを上方に向けて突出させてもよい。この突起部41dを弾性膜部材43の弾性膜部43bの穴部43cに挿入することで、下部ホルダ41に対して弾性膜部材43を位置決めすることができる。
また、穴部43cの内周面と、突起部41dの外周面との間には、第二オリフィス通路46となる円筒状の隙間が形成される。そして、突起部41dの外径や高さを変更したり、中央穴42gの内径を変更したりすることで、第二オリフィス通路46の共振特性を調整することができる。 The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, as shown in FIG. 5, a
In addition, a cylindrical gap serving as the
本実施形態の弾性膜部材43の内周部43dは、図3(a)に示すように、弾性膜部43bに対して上下方向に突出しているが、突出部は弾性膜部43bに対して上下方向の少なくとも一方に突出していればよい。さらに、弾性膜部材43に内周部43dを形成しなくてもよい。
As shown in FIG. 3A, the inner peripheral portion 43d of the elastic film member 43 of the present embodiment protrudes in the vertical direction with respect to the elastic film portion 43b, but the protruding portion protrudes from the elastic film portion 43b. It only has to protrude in at least one of the vertical directions. Furthermore, the inner peripheral portion 43 d may not be formed in the elastic film member 43.
本実施形態では、上部ホルダ42および下部ホルダ41によって弾性膜部材43を挟んでいるが、上部ホルダ42を設けることなく、下部ホルダ41の上面に弾性膜部材43を取り付けてもよい。
In this embodiment, the elastic film member 43 is sandwiched between the upper holder 42 and the lower holder 41, but the elastic film member 43 may be attached to the upper surface of the lower holder 41 without providing the upper holder 42.
本実施形態の防振装置1は、振動部材であるエンジンと、非振動部材である車体との間に介設されているが、本発明の防振装置を適用可能な振動部材および非振動部材は限定されるものではない。
Although the vibration isolator 1 of this embodiment is interposed between the engine which is a vibration member and the vehicle body which is a non-vibration member, the vibration member and non-vibration member to which the vibration isolation device of the present invention can be applied. Is not limited.
1 防振装置
1a 主液室
1b 副液室
10 第一取付部材
20 第二取付部材
30 インシュレータ
40 仕切部材
41 下部ホルダ
41a 凹溝
41b 凹部
41c 底面
41d 突起部
41e 連通穴
41g 変位規制部
42 上部ホルダ
42a 開口部
42d 第一連通穴
42e 第二連通穴
42g 変位規制部
43 弾性膜部材
43a 固定部
43b 弾性膜部
43c 穴部
43d 突出部
45 第一オリフィス通路
46 第二オリフィス通路
50 ダイヤフラム DESCRIPTION OF SYMBOLS 1Vibration isolator 1a Main liquid chamber 1b Sub liquid chamber 10 1st attachment member 20 2nd attachment member 30 Insulator 40 Partition member 41 Lower holder 41a Recessed groove 41b Recessed part 41c Bottom face 41d Protrusion part 41e Communication hole 41g Displacement regulation part 42 Upper holder 42a Opening 42d First communication hole 42e Second communication hole 42g Displacement restricting part 43 Elastic film member 43a Fixing part 43b Elastic film part 43c Hole part 43d Projecting part 45 First orifice path 46 Second orifice path 50 Diaphragm
1a 主液室
1b 副液室
10 第一取付部材
20 第二取付部材
30 インシュレータ
40 仕切部材
41 下部ホルダ
41a 凹溝
41b 凹部
41c 底面
41d 突起部
41e 連通穴
41g 変位規制部
42 上部ホルダ
42a 開口部
42d 第一連通穴
42e 第二連通穴
42g 変位規制部
43 弾性膜部材
43a 固定部
43b 弾性膜部
43c 穴部
43d 突出部
45 第一オリフィス通路
46 第二オリフィス通路
50 ダイヤフラム DESCRIPTION OF SYMBOLS 1
Claims (5)
- 振動部材と非振動部材との間に介設される防振装置であって、
前記振動部材に取り付けられる第一取付部材と、
前記非振動部材に取り付けられる第二取付部材と、
前記第一取付部材と前記第二取付部材との間に介設されたインシュレータと、
前記インシュレータに取り付けられた仕切部材およびダイヤフラムと、を備え、
前記インシュレータと前記仕切部材との間に主液室が形成されるとともに、
前記仕切部材と前記ダイヤフラムとの間に副液室が形成されており、
前記仕切部材は、
前記インシュレータに取り付けられるホルダと、
前記ホルダに取り付けられた弾性膜部材と、を備え、
前記ホルダには、前記主液室と前記副液室とを連通させる第一オリフィス通路が形成され、
初期状態において、前記弾性膜部材は、前記ホルダの変位規制部に対して前記主液室側に隙間を空けて配置され、前記弾性膜部材と前記変位規制部との隙間には、前記主液室と前記副液室とを連通させる第二オリフィス通路が形成されており、
前記第一取付部材に入力された振動が所定の振幅よりも大きい場合には、前記弾性膜部材が弾性変形して、前記弾性膜部材と前記変位規制部との隙間が塞がれることを特徴とする防振装置。 An anti-vibration device interposed between the vibration member and the non-vibration member,
A first attachment member attached to the vibration member;
A second attachment member attached to the non-vibrating member;
An insulator interposed between the first mounting member and the second mounting member;
A partition member and a diaphragm attached to the insulator,
While a main liquid chamber is formed between the insulator and the partition member,
A sub liquid chamber is formed between the partition member and the diaphragm,
The partition member is
A holder attached to the insulator;
An elastic membrane member attached to the holder,
The holder is formed with a first orifice passage for communicating the main liquid chamber and the sub liquid chamber.
In an initial state, the elastic membrane member is disposed with a gap on the main liquid chamber side with respect to the displacement regulating portion of the holder, and the main liquid chamber is disposed in the gap between the elastic membrane member and the displacement regulating portion. A second orifice passage is formed for communicating the chamber and the sub-liquid chamber,
When the vibration input to the first mounting member is greater than a predetermined amplitude, the elastic membrane member is elastically deformed, and the gap between the elastic membrane member and the displacement restricting portion is closed. Anti-vibration device. - 前記仕切り部材は、前記インシュレータに取り付けられる他のホルダを備え、
前記弾性膜部材は、前記他のホルダの変位規制部に対して前記副液室側に隙間を空けて配置されていることを特徴とする請求項1に記載の防振装置。 The partition member includes another holder attached to the insulator,
2. The vibration isolator according to claim 1, wherein the elastic film member is disposed with a gap on the side of the secondary liquid chamber with respect to a displacement restricting portion of the other holder. - 前記弾性膜部材の外周部が前記ホルダに取り付けられるとともに、
前記弾性膜部材には穴部が形成され、
前記穴部および前記隙間によって前記第二オリフィス通路が形成されており、
前記第一取付部材に入力された振動が所定の振幅よりも大きい場合には、前記穴部の外周部が前記ホルダの前記変位規制部に当接することを特徴とする請求項1または請求項2に記載の防振装置。 While the outer peripheral part of the elastic membrane member is attached to the holder,
A hole is formed in the elastic membrane member,
The second orifice passage is formed by the hole and the gap,
The outer peripheral part of the said hole part contact | abuts to the said displacement control part of the said holder when the vibration input into said 1st attachment member is larger than predetermined amplitude. The vibration isolator described in 1. - 前記穴部には、前記ホルダに形成された突起部が挿入されていることを特徴とする請求項3に記載の防振装置。 The vibration isolator according to claim 3, wherein a protrusion formed on the holder is inserted into the hole.
- 前記弾性膜部材は、
弾性膜部と、
前記弾性膜部に形成された穴部と、
前記弾性膜部の外周縁部に形成された外周部と、を備え、
前記弾性膜部は、前記穴部側の部位の厚さが前記外周部側の部位の厚さよりも大きく形成されていることを特徴とする請求項1または請求項2に記載の防振装置。 The elastic membrane member is
An elastic membrane part;
A hole formed in the elastic membrane part;
An outer peripheral part formed on the outer peripheral edge of the elastic film part,
3. The vibration isolator according to claim 1, wherein the elastic film portion is formed such that a thickness of a portion on the hole portion side is larger than a thickness of a portion on the outer peripheral portion side.
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