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WO2018159296A1 - Amortisseur à friction - Google Patents

Amortisseur à friction Download PDF

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Publication number
WO2018159296A1
WO2018159296A1 PCT/JP2018/005119 JP2018005119W WO2018159296A1 WO 2018159296 A1 WO2018159296 A1 WO 2018159296A1 JP 2018005119 W JP2018005119 W JP 2018005119W WO 2018159296 A1 WO2018159296 A1 WO 2018159296A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
rod
peripheral surface
elastic member
friction damper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/005119
Other languages
English (en)
Japanese (ja)
Inventor
一樹 長谷川
朋之 工藤
玲子 飯沼
将志 大滝
泰彦 西村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KYB Corp
Original Assignee
KYB Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KYB Corp filed Critical KYB Corp
Priority to KR1020187024690A priority Critical patent/KR20180109967A/ko
Priority to CN201880001120.XA priority patent/CN108811507A/zh
Publication of WO2018159296A1 publication Critical patent/WO2018159296A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
    • F16F7/09—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other in dampers of the cylinder-and-piston type
    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • 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
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other

Definitions

  • the present invention relates to a friction damper.
  • Patent Document 1 discloses a conventional friction damper.
  • the friction damper includes an outer housing, a rod, an inner damping member, and a spring.
  • the outer housing is formed in a cylindrical shape.
  • the rod protrudes from one end of the outer housing.
  • the rod is inserted into the outer housing so as to be reciprocally movable in the axial direction.
  • the inner damping member is slidably attached to the inner peripheral surface of the outer housing.
  • the inner damping member generates a damping force by a frictional force generated between the inner housing and the inner peripheral surface of the outer housing due to the relative movement of the outer housing and the rod.
  • the spring applies an elastic force between the outer housing and the rod in a direction in which the tip of the rod moves away from the outer housing. Thereby, the friction damper of patent document 1 can absorb the vibration and impact between an outer housing and a rod.
  • the present invention has been made in view of the above-described conventional situation, and an object to be solved is to provide a friction damper capable of suitably suppressing foreign matter from entering the friction surface.
  • the friction damper of the present invention includes a cylinder, a rod, a friction member, an elastic member, and a seal member.
  • the cylinder is formed in a cylindrical shape.
  • the rod is reciprocally movable in the axial direction, and a part thereof is accommodated in the cylinder.
  • the friction member is disposed inside the cylinder, and generates a damping force by a frictional force generated between at least one of the inner peripheral surface of the cylinder and the outer peripheral surface of the rod by relative movement between the cylinder and the rod.
  • the elastic member applies an elastic force in a direction in which the protruding length from the cylinder on one end side of the rod becomes longer.
  • the sealing member is provided with the elastic force of the elastic member, and is held by the elastic member to seal a gap that communicates the outside and the inside of the cylinder.
  • the friction damper of the present invention may include an outer tube.
  • This outer tube is formed in a bottomed cylindrical shape, one end of the rod is connected to the bottom, one end of the cylinder is inserted into the cylindrical part, and the outer peripheral surface of the cylinder is between the inner peripheral surface of the cylinder and the outer peripheral surface of the cylinder.
  • a gap is formed.
  • an elastic member is distribute
  • the seal member is disposed on the outer periphery of the cylinder, and can contact the end surface on the opening side of the outer tube and the outer peripheral surface of the cylinder by the elastic member to seal the gap.
  • a groove can be formed in the outer tube.
  • This groove portion is formed at the end portion on the inner peripheral surface side of the end surface on the opening side of the outer tube, and opens to the end surface side and inner peripheral surface side on the opening side of the outer tube.
  • a sealing member can be distribute
  • the friction damper of the present invention can include an outer tube.
  • This outer tube is formed in a bottomed cylindrical shape, one end of the rod is connected to the bottom, one end of the cylinder is inserted into the cylindrical part, and the outer peripheral surface of the cylinder is between the inner peripheral surface of the cylinder and the outer peripheral surface of the cylinder.
  • a gap is formed.
  • the elastic member is disposed between one end of the cylinder and the bottom of the outer tube, and can apply an elastic force toward the end surface on the one end portion side of the cylinder.
  • the seal member is arranged on the inner periphery of the outer tube, and can contact the end surface on the one end portion side of the cylinder and the inner peripheral surface of the outer tube by the elastic member to seal the gap.
  • the friction damper of the present invention may be provided with a rod guide.
  • the rod guide seals the opening on one end of the cylinder and has an insertion hole through which the rod is reciprocally movable in the axial direction. A gap is formed between the insertion hole and the outer peripheral surface of the rod. is doing.
  • the elastic member is disposed on the outer periphery of the rod protruding from the cylinder, and can apply an elastic force toward the outer end face of the rod guide.
  • the seal member is disposed on the outer periphery of the rod protruding outward from the rod guide, and can contact the outer end surface of the rod guide and the outer peripheral surface of the rod by the elastic member to seal the gap.
  • the seal member may be disposed in contact with an inclined surface inclined with respect to a direction orthogonal to the axial direction.
  • the elastic member may be a coil spring.
  • a washer may be provided between the coil spring and the seal member.
  • FIG. 3 is a side sectional view schematically showing the friction damper of the first embodiment. It is a principal part enlarged view of FIG.
  • FIG. 5 is a side cross-sectional view schematically showing a friction damper according to a second embodiment. It is a principal part enlarged view of FIG. It is side surface sectional drawing which shows the friction damper of Embodiment 3 typically. It is a principal part enlarged view of FIG. It is a principal part expanded sectional view which shows typically the friction damper of other embodiment, and is a figure (the 1) which shows the other form of a groove part. It is a principal part expanded sectional view which shows typically the friction damper of other embodiment, and is a figure (the 2) which shows the other form of a groove part.
  • Embodiments 1 to 3 embodying the friction damper of the present invention will be described with reference to the drawings.
  • a friction damper used in a caster such as a wheelchair, a baby buggy, or a transport cart is exemplified.
  • the friction damper is incorporated in a mechanism portion such as a link mechanism provided between a caster mounting bracket and a wheel, so that a road surface with unevenness or steps such as a Braille block (block) is provided. It is possible to mitigate vibration attenuation and shock when traveling.
  • the friction damper 1 of Embodiment 1 is provided with the cylinder 10, the rod 20, the friction member 30, the elastic member 40, and the sealing member 50, as shown in FIG.1 and FIG.2. Further, the friction damper 1 includes an outer tube 60.
  • the cylinder 10 is formed in a cylindrical shape with both ends opened.
  • a cylindrical rod guide 11 is fitted into one end portion 10A of the cylinder 10 by screwing, and the opening on the end portion 10A side is sealed.
  • the cylindrical rod guide 11 is formed with an insertion hole 11A penetrating in the axial direction.
  • the rod guide 11 presses a friction member 30 described later in the axial direction.
  • a cylinder side joint part 12 is provided at the other end 10 ⁇ / b> B of the cylinder 10.
  • the cylinder side joint part 12 becomes a connection site
  • the cylinder side joint portion 12 is formed with a through hole 12A through which a pin or the like can be inserted.
  • a diameter-expanded portion 10C having a larger diameter than other portions is formed in the inside of the cylinder 10 near the end portion 10A.
  • the friction member 30 is accommodated in the enlarged diameter portion 10C, and the rod 20 is inserted therethrough.
  • a reduced diameter portion 10D disposed adjacent to the enlarged diameter portion 10C is formed inside the end portion 10B of the cylinder 10.
  • the outer peripheral surface 10E on the end portion 10B side of the cylinder 10 is formed with a larger diameter than the outer peripheral surface 10F on the end portion 10A side.
  • the rod 20 is reciprocally movable in the axial direction, and a part thereof is accommodated in the cylinder 10.
  • the rod 20 is formed in a columnar shape, and is arranged with one end 20 ⁇ / b> A protruding from the end 10 ⁇ / b> A of the cylinder 10.
  • the rod 20 has one end 20 ⁇ / b> A side supported by the insertion hole 11 ⁇ / b> A of the rod guide 11, and the other end 20 ⁇ / b> B side supported by the reduced diameter portion 10 ⁇ / b> D of the cylinder 10.
  • the rod 20 is slidably inserted into cylindrical bushes 70 and 71 provided in the reduced diameter portion 10D of the cylinder 10 and the insertion hole 11A of the rod guide 11, respectively. It is supported by the reduced diameter portion 10 ⁇ / b> D of the cylinder 10 and the rod guide 11 via two bushes 70 and 71.
  • a piston portion 21 is provided in the middle of the rod 20 in the axial direction.
  • the piston portion 21 is formed to have a diameter larger than the outer diameter of other portions of the rod 20.
  • the rod 20 has the piston portion 21 disposed in the enlarged diameter portion 10 ⁇ / b> C of the cylinder 10.
  • a bolt 22 is attached to the other end 20 ⁇ / b> B of the rod 20.
  • the bolt 22 attaches a washer 23 having an outer diameter larger than the inner diameter of the reduced diameter portion 10 ⁇ / b> D of the cylinder 10 to the end portion 20 ⁇ / b> B of the rod 20.
  • the washer 23 abuts against the outer end surface of the reduced diameter portion 10D, thereby functioning as a retaining stopper that prevents the rod 20 from slipping out from the rod guide 11 side, and prevents foreign matter from entering the cylinder 10. Functions as a metal seal.
  • the friction member 30 is disposed inside the cylinder 10. Specifically, the friction member 30 is disposed in the enlarged diameter portion 10 ⁇ / b> C of the inside of the cylinder 10. The friction member 30 is pressed in the axial direction by the rod guide 11.
  • the friction member 30 is a member formed in a cylindrical shape made of urethane rubber having a hardness of 70 °.
  • the friction member 30 has an outer diameter and an axial length that are equal to the inner diameter and axial length of the enlarged diameter portion 10C, and is disposed in the cylinder 10 in a form that fits into the enlarged diameter portion 10C. .
  • the outer peripheral surface 21A of the piston portion 21 is slidably in contact with the inner peripheral surface 30A of the friction member 30.
  • the friction member 30 has an inner peripheral surface 30A having a diameter smaller than that of the outer peripheral surface 21A of the piston portion 21, and the outer periphery of the piston portion 21 while applying a surface pressure in an elastically deformed state. It is in contact with the surface 21A.
  • the friction member 30 generates a damping force by a frictional force generated between the cylinder 10 and the rod 20 due to relative movement between the cylinder 10 and the rod 20.
  • the friction member 30 has an inner peripheral surface 30 ⁇ / b> A and an outer peripheral surface 21 ⁇ / b> A of the piston portion 21 among the outer peripheral surfaces of the rod 20 as the rod 20 moves relative to the cylinder 10 in the axial direction.
  • a frictional force is generated between That is, in the friction damper 1 of the first embodiment, the friction surfaces are the inner peripheral surface 30 ⁇ / b> A of the friction member 30 and the outer peripheral surface 21 ⁇ / b> A of the piston portion 21.
  • the frictional force generated by sliding between these friction surfaces acts as a damping force that suppresses the axial movement of the rod 20.
  • the piston portion 21 has a through hole (not shown) that penetrates both end surfaces in the axial direction. This through hole ensures ventilation between the space IS inside the cylinder 10 partitioned by the piston portion 21, and responds to the volume change of the space IS when the friction damper 1 expands and contracts and the piston portion 21 moves. Yes.
  • the elastic member 40 gives an elastic force in a direction (left-right direction in FIG. 1) in which the protruding length from the cylinder 10 on the end 20A side of the rod 20 becomes longer. In other words, the elastic member 40 applies an elastic force in the direction in which the friction damper 1 is extended.
  • the elastic member 40 is disposed on the outer periphery of the cylinder 10 and applies an elastic force toward the end surface 62B on the opening side of the outer tube 60 described later.
  • the elastic member 40 of this embodiment employs a compression coil spring, and is disposed on the outer periphery of the cylinder 10 in such a manner that the cylinder 10 is inserted into the inner periphery from the end portion 10A side.
  • a washer 41 that abuts against the stepped portion 10G of the cylinder 10 is provided at one end of the elastic member 40.
  • a washer 42 is provided at the other end of the elastic member 40 so as to abut an end face 62B on the opening side of the outer tube 60 described later.
  • the elastic force of the elastic member 40 is applied to the washers 41 and 42 in a direction away from each other, and the elastic force is transmitted to the cylinder 10 and the outer tube 60 that receive the washers 41 and 42.
  • the washer 42 has an inclined surface 42A.
  • the inclined surface 42A is formed so as to open to the end surface and inner peripheral surface of the washer 42 on the axially outer side (left direction in FIG. 2). That is, the inclined surface 42A is inclined with respect to the radial direction of the washer 42, which is a direction orthogonal to the axial direction, and is formed so as to face the axially outer side and the inner peripheral direction of the washer 42.
  • the inclined surface 42A is formed over the entire circumference of the washer 42, and has a taper shape that decreases in diameter in the axial direction from the end surface on the outer side in the axial direction toward the other end.
  • the groove part G1 which is the space enclosed by the outer peripheral surface 10F of the cylinder 10, and the end surface 62B by the side of the opening of the outer tube 60. As shown in FIG.
  • the groove part G1 has a triangular cross section.
  • the sealing member 50 is provided with the elastic force of the elastic member 40, and is held by the elastic member 40 to block the gap CP that communicates the outside and the inside of the cylinder 10.
  • the clearance CP is a passage that connects the space ES outside the cylinder 10 and the space IS inside.
  • the gap CP includes a gap CP1 between the insertion hole 11A of the rod guide 11 and the outer peripheral surface 20C of the rod 20 (between the bush 71 and the rod 20), and a space CP2 inside the outer tube 60.
  • a gap CP3 between the outer peripheral surface 10F of the cylinder 10 and the inner peripheral surface 62C of the cylindrical portion 62 of the outer tube 60 is formed.
  • an air passage (not shown) is connected to the space CP ⁇ b> 2 inside the outer tube 60 in order to cope with a volume change accompanying expansion and contraction of the friction damper 1.
  • the seal member 50 is disposed on the outer periphery of the cylinder 10, and the elastic member 40 abuts the end surface 62 ⁇ / b> B on the opening side of the outer tube 60 and the outer peripheral surface 10 ⁇ / b> F of the cylinder 10 to seal the gap CP. . Further, the seal member 50 is disposed in the groove G1.
  • the seal member 50 is an O-ring.
  • the seal member 50 is in contact with an inclined surface 42A that is an inner wall of the groove G1 having a triangular cross section, and receives the elastic force of the elastic member 40 through the inclined surface 42A.
  • the seal member 50 is an end surface 62B on the opening side of the outer tube 60 that is an axial contact surface, and a radial contact surface in a state where the elastic member 40 is applied with an elastic force and pressed.
  • the gap CP is sealed by contacting the outer peripheral surface 10F of the cylinder 10.
  • the seal member 50 of the present embodiment is disposed at a position that becomes a boundary between the gap CP and the external space ES, and can be said to seal the outermost side of the gap CP.
  • the seal member 50 which is an O-ring, is pressed with a crushing allowance defined by, for example, Japanese Industrial Standards (JIS).
  • the outer tube 60 is formed in a bottomed cylindrical shape with one end opened.
  • the outer tube 60 has a bottom portion 61 and a cylindrical portion 62.
  • a rod side joint portion 63 is provided outside the bottom portion 61 of the outer tube 60.
  • the rod side joint part 63 is a connecting part with other members together with the cylinder side joint part 12.
  • the rod side joint portion 63 is formed with a through hole 63A through which a pin or the like can be inserted.
  • the rod side joint portion 63 is attached to the rod 20 by a screw portion 63B that is inserted through the bottom portion 61 of the outer tube 60 and screwed into the end portion 20A of the rod 20.
  • the outer tube 60 is connected to the bottom portion 61 at an end portion 20 ⁇ / b> A that is one end portion of the rod 20.
  • the outer tube 60 is attached to the end 20 ⁇ / b> A of the rod 20 in such a form that the opening 62 ⁇ / b> A of the cylindrical portion 62 covers the outer peripheral surface 10 ⁇ / b> F on the end 10 ⁇ / b> A side of the cylinder 10.
  • one end portion 10 ⁇ / b> A of the cylinder 10 is inserted into the cylindrical portion 62 of the outer tube 60.
  • the seal member 50 disposed in the groove G1 moves relative to the cylinder 10. That is, the seal member 50 slides on the outer peripheral surface 10F of the cylinder 10 in the axial direction when the friction damper 1 is expanded and contracted.
  • the seal member 50 is sandwiched between the inclined surface 42 ⁇ / b> A and the end surface 62 ⁇ / b> B on the opening side of the outer tube 60 by receiving the elastic force of the elastic member 40. For this reason, the seal member 50 is stably held without falling off, and reliably prevents foreign matter from entering.
  • the seal member 50 is disposed on the outer periphery of the cylinder 10, and the elastic force of the elastic member 40 is applied toward the end surface 62 ⁇ / b> B on the opening side of the outer tube 60 to press the end surface 62 ⁇ / b> B and the outer peripheral surface 10 ⁇ / b> F of the cylinder 10.
  • the gap CP is sealed by contact.
  • the gap CP is stably sealed to prevent foreign matter from entering the gap CP.
  • the seal member 50 seals the gap CP at a position closest to the outer space ES that is the entrance of the gap CP, and has the largest distance to the space IS inside the cylinder 10. For this reason, even if a foreign object enters the gap CP beyond the seal member 50, the arrival of the foreign material on the friction surface in the cylinder 10 is suppressed.
  • the friction damper 1 includes the cylinder 10, the rod 20, the friction member 30, the elastic member 40, and the seal member 50.
  • the cylinder 10 is formed in a cylindrical shape.
  • the rod 20 is reciprocally movable in the axial direction, and a part thereof is accommodated in the cylinder 10.
  • the friction member 30 is disposed inside the cylinder 10, and generates a damping force by a frictional force generated between the outer peripheral surface 21 ⁇ / b> A of the rod 20 due to relative movement between the cylinder 10 and the rod 20.
  • the elastic member 40 gives an elastic force in a direction in which the protruding length from the cylinder 10 on the one end 20A side of the rod 20 becomes longer.
  • the sealing member 50 is provided with the elastic force of the elastic member 40, and is held by the elastic member 40 to seal the gap CP that communicates the outside and the inside of the cylinder 10.
  • the friction damper 1 receives the elastic force from the elastic member 40 by the seal member 50, and the seal member 50 is held in a state where this elastic force is applied. For this reason, it is possible to reliably prevent the seal member 50 from dropping off due to impact or vibration. As a result, the state sealed by the seal member 50 can be reliably held.
  • the friction damper 1 can suitably suppress entry of foreign matter into the friction surface.
  • the friction damper 1 is provided with an outer tube 60.
  • the outer tube 60 is formed in a bottomed cylindrical shape, one end 20A of the rod 20 is connected to the bottom 61, one end 10A of the cylinder 10 is inserted into the cylindrical 62, and A gap CP (CP3) is formed between the inner peripheral surface and the outer peripheral surface 10F of the cylinder 10.
  • the elastic member 40 is disposed on the outer periphery of the cylinder 10 and applies an elastic force toward the end surface 62B on the opening side of the outer tube 60.
  • the seal member 50 is disposed on the outer periphery of the cylinder 10, and abuts against the end surface 62 ⁇ / b> B on the opening side of the outer tube 60 and the outer peripheral surface 10 ⁇ / b> F of the cylinder 10 by the elastic member 40 to seal the gap CP.
  • the sealing member is arrange
  • route can be taken longer. Thereby, it can suppress that the foreign material which passed the seal member 50 arrives between the inner peripheral surface of the friction member 30 which is a friction surface in the cylinder 10, and the outer peripheral surface 21A of the piston part 21 of the rod 20. .
  • the seal member 50 is disposed in contact with the inclined surface 42A inclined with respect to the direction orthogonal to the axial direction. For this reason, the elastic force by the elastic member 40 can be suitably converted not only into the axial direction but also into a force that presses the seal member 50 in the radial direction. As a result, the seal member 50 can be suitably pressed against the end surface 62B on the opening side of the outer tube 60 that is an axial contact surface and the outer peripheral surface 10F of the cylinder 10 that is a radial contact surface. .
  • the elastic member 40 is a coil spring. And the washer 42 distribute
  • Embodiment 2 will be described with reference to FIGS. 3 and 4.
  • the friction damper 201 according to the second embodiment shown in FIGS. 3 and 4 differs from the friction damper 1 according to the first embodiment in the arrangement form of the elastic member 240 and the seal member 250.
  • parts having substantially the same configurations and functions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed description thereof is omitted.
  • the elastic member 240 employs a compression coil spring.
  • the elastic member 240 is arranged in such a manner that the rod 20 is inserted into the inner periphery thereof from the end portion 20 ⁇ / b> A side and the outer periphery thereof is covered with the cylindrical portion 62 of the outer tube 60.
  • One end of the elastic member 240 is in contact with the bottom 61 of the outer tube 60.
  • a washer 242 that abuts against the end surface 10H of the cylinder 10 on the end 10A side is provided at the other end of the elastic member 240.
  • the washer 242 is given the elastic force of the elastic member 40 in the direction away from the bottom 61 of the outer tube 60, and the elastic force is transmitted to the cylinder 10 that receives the washer 242.
  • the washer 242 has an inclined surface 242A.
  • the inclined surface 242A is formed to open to the end surface and the outer peripheral surface of the washer 242 on the axially inner side (right direction in FIG. 4). That is, the inclined surface 242A is inclined with respect to the radial direction of the washer 242 which is a direction orthogonal to the axial direction, and is formed so as to face the axially inner side and the outer peripheral direction of the washer 242.
  • the inclined surface 242A is formed over the entire circumference of the washer 242, and as a whole, the inclined surface 242A has a tapered shape in which the diameter increases in the axial direction from the end surface on the inner side in the axial direction toward the other end.
  • the inclined surface 242A forms a groove portion G2 that is a space surrounded by the end surface 10H on the end portion 10A side of the cylinder 10 and the inner peripheral surface 62C of the cylindrical portion 62 of the outer tube 60.
  • the groove part G2 has a triangular cross section like the groove part G1 of the first embodiment.
  • the seal member 250 is given the elastic force of the elastic member 240.
  • the seal member 250 is held by the elastic member 240 and seals the gap CP.
  • the seal member 250 is disposed on the inner periphery of the cylindrical portion 62 of the outer tube 60, and is given the elastic force of the elastic member 240 toward the end surface 10H on the end portion 10A side of the cylinder 10. More specifically, the seal member 250 is disposed in the groove part G2.
  • the seal member 250 is an O-ring similar to the seal member 50 of the first embodiment.
  • the seal member 250 is in contact with an inclined surface 242A that is an inner wall of the groove part G2 having a triangular cross section, and receives the elastic force of the elastic member 240 through the inclined surface 242A.
  • the seal member 250 receives the elastic force of the elastic member 240 via the inclined surface 242A, whereby the end surface 10H on the end portion 10A side of the cylinder 10 that is an axial contact surface and the radial contact surface.
  • the gap CP is sealed while being pressed by the inner peripheral surface 62 ⁇ / b> C of the cylindrical portion 62 of a certain outer tube 60.
  • the friction damper 201 contracts by receiving an external force, or when the external force is removed and the elastic member 240 expands by the elastic force of the elastic member 240, the outer peripheral surface 21A of the piston portion 21 of the rod 20 is a friction member as in the first embodiment.
  • the frictional force is generated by sliding on the inner peripheral surface 30A of the 30.
  • this frictional force acts against expansion and contraction, it acts as a damping force that attenuates the contraction or expansion motion.
  • the seal member 250 disposed in the groove G2 moves relative to the outer tube 60. That is, the seal member 250 slides in the axial direction on the inner peripheral surface 62C of the cylindrical portion 62 of the outer tube 60 when the friction damper 201 is expanded and contracted.
  • the seal member 250 is sandwiched between the inclined surface 242A and the end surface 10H on the end portion 10A side of the cylinder 10 under the elastic force of the elastic member 240. For this reason, the seal member 250 is stably held without falling off, and reliably prevents foreign matter from entering.
  • the seal member 250 is disposed on the inner circumference of the cylindrical portion 62 of the outer tube 60, and the elastic force of the elastic member 240 is applied toward the end surface 10 ⁇ / b> H on the end portion 10 ⁇ / b> A side of the cylinder 10.
  • the gap CP is sealed by being in contact with the inner peripheral surface 62C of the cylindrical portion 62 and the end surface 10H on the end portion 10A side of the cylinder 10 while being pressed. For this reason, the gap CP is stably sealed to prevent foreign matter from entering the gap CP.
  • the friction damper 201 having such a configuration receives the elastic force of the elastic member 240 by the seal member 250, and the seal member 250 is held in a state of receiving the elastic force. For this reason, it is possible to reliably prevent the seal member 250 from dropping off due to impact or vibration. As a result, the state sealed by the seal member 250 can be reliably held. Therefore, like the friction damper 1 of the first embodiment, the friction damper 201 can suitably suppress entry of foreign matter into the friction surface.
  • the elastic member 240 is disposed between the end portion 10 ⁇ / b> A of the cylinder 10 and the bottom portion 61 of the outer tube 60, and the elastic force toward the end surface 10 ⁇ / b> H on the one end portion 10 ⁇ / b> A side of the cylinder 10. Is granted.
  • the seal member 250 is disposed on the inner periphery of the outer tube 60, and the elastic member 240 contacts the end surface 10H on the end 10A side of the cylinder 10 and the inner peripheral surface of the outer tube 60 to seal the gap CP. . For this reason, the gap CP can be suitably sealed by the seal member 250.
  • the elastic member 240 is arranged side by side in the axial direction of the cylinder 10, the size of the friction damper in the radial direction can be reduced as compared with the case where the elastic member is arranged on the outer periphery of the cylinder. .
  • the seal member 250 is disposed in contact with the inclined surface 242A inclined with respect to the direction orthogonal to the axial direction. For this reason, the elastic force by the elastic member 240 can be suitably converted not only into the axial direction but also into a force that presses the seal member 250 in the radial direction. As a result, the seal member 250 is applied to each of the end surface 10H on the end portion 10A side of the cylinder 10 which is an axial contact surface and the inner peripheral surface 62C of the cylindrical portion 62 of the outer tube 60 which is a radial contact surface. It can press suitably.
  • the elastic member 240 is a coil spring. And the washer 242 distribute
  • Embodiment 3 will be described with reference to FIGS.
  • the friction damper 301 according to the third embodiment shown in FIGS. 5 and 6 is different from the friction damper 1 according to the first embodiment in the arrangement form of the elastic member 340 and the seal member 350.
  • parts having substantially the same configurations and functions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed description thereof is omitted.
  • the elastic member 340 employs a compression coil spring, and the rod 20 is disposed on the inner periphery thereof, as in the elastic member 240 of the second embodiment. While being inserted from the end 20 ⁇ / b> A side, the outer periphery of the outer tube 60 is covered with the cylindrical portion 62. One end portion of the elastic member 340 is in contact with the bottom portion 61 of the outer tube 60, and a washer 342 that is in contact with the end surface 10 ⁇ / b> H on the end portion 10 ⁇ / b> A side of the cylinder 10 is provided at the other end portion.
  • the washer 342 is given an elastic force of the elastic member 40 in a direction away from the bottom 61 of the outer tube 60, and the elastic force is transmitted to the cylinder 10 that receives the washer 342.
  • the washer 342 has an inclined surface 342A.
  • the inclined surface 342A is formed so as to open to the end surface and the inner peripheral surface of the washer 342 on the inner side in the axial direction (right direction in FIG. 6). That is, the inclined surface 342A is inclined with respect to the radial direction of the washer 242 which is a direction orthogonal to the axial direction, and is formed so as to face the axially inner side and the inner peripheral direction of the washer 242.
  • the inclined surface 342A is formed over the entire circumference of the washer 342, and as a whole, the inclined surface 342A has a tapered shape whose diameter decreases in the axial direction from the end surface on the inner side in the axial direction toward the other end.
  • the inclined surface 342A forms a groove G3 that is a space surrounded by the outer end surface 11B of the rod guide 11 and the outer peripheral surface of the rod 20.
  • the groove part G3 has a triangular cross section like the groove parts G1 and G2 of the first and second embodiments.
  • the seal member 350 is given the elastic force of the elastic member 340.
  • the seal member 350 is held by the elastic member 340 and seals the gap CP.
  • the seal member 350 is disposed on the outer periphery of the rod 20, and the elastic force of the elastic member 240 is applied toward the outer end surface 11 ⁇ / b> B of the rod guide 11. More specifically, the seal member 350 is disposed in the groove G3.
  • the seal member 350 is an O-ring similar to the seal members 50 and 250 of the first and second embodiments.
  • the seal member 350 is in contact with an inclined surface 342A that is an inner wall of the groove G3 having a triangular cross section, and receives the elastic force of the elastic member 340 through the inclined surface 342A.
  • the seal member 350 receives the elastic force of the elastic member 340 via the inclined surface 342A, whereby the outer end surface 11B of the rod guide 11 which is an axial contact surface and the rod which is a radial contact surface.
  • the gap CP is sealed while being pressed by the outer peripheral surface 20C of the 20.
  • the friction damper 301 receives an external force and contracts, or when the external force is removed and the elastic member 340 expands due to the elastic force of the elastic member 340, the outer peripheral surface 21A of the piston portion 21 of the rod 20 is a friction member as in the first embodiment.
  • the frictional force is generated by sliding on the inner peripheral surface 30A of the 30. When this frictional force acts against expansion and contraction, it acts as a damping force that attenuates the contraction or expansion motion.
  • the seal member 350 disposed in the groove G3 moves relative to the rod 20. That is, the seal member 350 slides on the outer peripheral surface of the rod 20 in the axial direction when the friction damper 301 is expanded and contracted.
  • the seal member 350 is sandwiched between the inclined surface 342 ⁇ / b> A and the outer end surface 11 ⁇ / b> B of the rod guide 11 under the elastic force of the elastic member 340. For this reason, the seal member 350 is stably held without falling off, and reliably prevents foreign matter from entering.
  • the seal member 350 is disposed on the outer periphery of the rod 20, and the elastic force of the elastic member 340 is applied toward the outer end surface 11 ⁇ / b> B of the rod guide 11, and the outer surface of the rod 20 and the outer side of the rod guide 11 are applied.
  • the gap CP is sealed by contacting the end surface 11B while being pressed. For this reason, the gap CP is stably sealed to prevent foreign matter from entering the gap CP.
  • the seal member 350 receives the elastic force from the elastic member 340, and the seal member 350 is held in a state where this elastic force is applied. For this reason, it is possible to reliably prevent the seal member 350 from dropping off due to impact or vibration. As a result, the state sealed by the seal member 350 can be reliably held. Accordingly, the friction damper 301 can suitably suppress the entry of foreign matter into the friction surface, similarly to the friction dampers 1 and 201 of the first and second embodiments.
  • the friction damper 301 includes a rod guide 11.
  • the rod guide 11 closes the opening on the end 10A side of the cylinder 10, and the insertion hole through which the rod 20 is reciprocally movable in the axial direction. 11A is formed, and a gap CP1 is formed between the insertion hole 11A and the outer peripheral surface 20C of the rod 20.
  • the elastic member 340 is disposed on the outer periphery of the rod 20 protruding from the cylinder 10 and applies an elastic force toward the outer end surface 11 ⁇ / b> B of the rod guide 11.
  • the seal member 350 is disposed on the outer periphery of the rod 20 protruding outward from the rod guide 11, and abuts against the outer end surface 11 ⁇ / b> B of the rod guide 11 and the outer peripheral surface 20 ⁇ / b> C of the rod 20 by the elastic member 340 to seal the gap CP.
  • the elastic member 340 is arranged side by side in the axial direction of the cylinder 10, the size of the friction damper in the radial direction is reduced as compared with the case where the elastic member 340 is arranged on the outer periphery of the cylinder 10. be able to.
  • the present invention is not limited to the first to third embodiments described with reference to the above description and the drawings.
  • the following embodiments are also included in the technical scope of the present invention.
  • the O-ring is exemplified as the seal member.
  • the present invention is not limited to this, and other seal members may be employed.
  • the seal member is not limited to a circular cross-sectional shape such as an O-ring, and seal members having other cross-sectional shapes such as an elliptical cross-sectional shape, a half-moon shape, a rectangular cross-section, and a U-shaped cross-section may be employed.
  • the mode in which the groove is formed in the washer is illustrated, but this is not essential.
  • the groove portion may be formed on the member side that receives the elastic force of the elastic member via a washer.
  • a groove portion G ⁇ b> 4 formed on the end surface 462 ⁇ / b> B of the outer tube 460 that receives the elastic force of the elastic member 40 via the washer 442 may be used.
  • FIGS. 8 and 9 grooves G5 and G6 formed in the end surface 510H of the cylinder 510 and the end surface 611B of the rod guide 611 that receive the elastic force of the elastic members 240 and 340 through the washers 542 and 642, respectively. It is good.
  • the groove portion may be formed directly on the elastic member, such as the groove portion G8 formed at the end of the elastic member 840 shown in FIG.
  • These groove portions can have a triangular cross section like the groove portions of the first to third embodiments, and can form an inclined surface with which the seal member abuts.
  • the form of forming the groove portion having a triangular cross section is illustrated, but this is not essential.
  • the cross-sectional shape of the groove is not limited to a triangular shape. For example, the cross-sectional rectangular groove G9 shown in FIG.
  • the seal member 12A may employ
  • the form in which the seal member is disposed in the groove is illustrated, but this is not essential.
  • the seal member may be disposed without providing the groove.
  • a ventilation path (not shown) for connecting to the volume change accompanying expansion and contraction of the friction damper is connected to the space inside the outer tube is illustrated, but this is not essential.
  • a crank hole (crank) is formed in a vent hole that is connected from the other end side of the rod to ensure a distance from the outside, or a bottom portion or a cylindrical portion of the outer tube.
  • vents such as vent holes formed by bending in a shape, can be employed.
  • a mode in which a washer is attached to the other end of the rod to prevent foreign matter from entering the cylinder as a metal seal is illustrated, but this is not essential.
  • a seal is provided at the other end of the rod, not only this washer but also another type of seal member such as an O-ring may be provided.
  • the washer that receives the end face of the elastic member and the washer that is attached to the other end of the rod are exemplified. However, instead of these washers, a washer such as a spacer is used. Alternatively, a member having a thickness in the axial direction may be used.
  • the mode in which the friction member generates a damping force due to the frictional force generated between the outer peripheral surface of the rod is exemplified, but the mode in which the frictional force is generated between the inner peripheral surface of the cylinder That is, a configuration in which the friction member is attached to the rod, or a configuration in which a friction force is generated between both the inner peripheral surface of the cylinder and the outer peripheral surface of the rod, that is, the friction member slides on both the cylinder and the rod. It is good also as a form provided movably.
  • the friction damper includes an outer tube having a bottom portion and a cylindrical portion and one end portion of the rod connected to the bottom portion, and an elastic member disposed on the outer periphery of the rod.
  • the form in which the elastic force of the elastic member is applied in the direction in which the protruding length from the cylinder at one end of the rod is increased through the bottom is illustrated, but in this case, the cylindrical portion of the outer tube is not essential. That is, instead of the form including the outer tube, for example, the form including another member such as a disk-shaped member connected to one end of the rod and receiving the elastic force of the elastic member, or the one end of the rod is expanded. And it is good also as a form which receives an elastic member directly.
  • the mode including the rod guide is illustrated, but this rod guide does not necessarily have the function of guiding the rod.
  • the rod guide seals the opening on the one end side of the cylinder, and an insertion hole is formed through which the rod is reciprocally moved in the axial direction. Between the insertion hole and the outer peripheral surface of the rod, the form is not particularly limited.
  • the rod guide may be formed by bending the end of the cylinder inward. Also in such a rod guide, a seal member can be interposed between the rod guide.
  • Embodiments 1 to 3 exemplify a mode in which the sealing member is provided with the elastic force of the elastic member applied thereto, but in addition to this, the inner peripheral surface of the insertion hole of the rod guide and the outer periphery of the rod It is good also as a form further provided with the other sealing member arrange
  • the embodiment provided with the coil spring as the elastic member is exemplified, but this is not essential.
  • end portions of the coil spring there are several types of end portions of the coil spring, such as open end, closed end, and presence or absence of grinding.
  • end portions of the coil spring such as open end, closed end, and presence or absence of grinding.
  • an elastic force is applied non-uniformly in the radial direction of the seal member, such as occurrence of a non-contact portion or variation in the contact area.
  • a uniform elastic force can be applied to the seal member by the washer.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Vibration Dampers (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'invention concerne un amortisseur à friction capable de supprimer de manière appropriée l'entrée de corps étrangers dans une surface de friction. Un amortisseur à friction (1) est doté d'un cylindre (10), d'une tige (20), d'un élément de friction (30), d'un élément élastique (40) et d'un élément d'étanchéité (50). Le cylindre (10) présente la forme d'un tube. La tige (20) est capable de se déplacer librement dans une direction axiale et est partiellement reçue dans le cylindre (10). L'élément de friction (30) est agencé à l'intérieur du cylindre (10) pour générer une force d'amortissement sur la base d'une force de friction générée entre l'élément de friction (30) et une surface circonférentielle externe (20) de la tige (20) suite au mouvement relatif entre le cylindre (10) et la tige (20). L'élément élastique (40) applique une force élastique dans une direction dans laquelle la longueur de projection de la tige (20) sur un côté d'extrémité (20A) à partir du cylindre (10) augmente. La force élastique de l'élément élastique (40) est appliquée à l'élément d'étanchéité (50). L'élément d'étanchéité (50) est maintenu par l'élément élastique (40) pour assurer l'étanchéité d'un espace (CP) à travers lequel l'extérieur et l'intérieur du cylindre (10) communiquent l'un avec l'autre.
PCT/JP2018/005119 2017-03-03 2018-02-14 Amortisseur à friction Ceased WO2018159296A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020187024690A KR20180109967A (ko) 2017-03-03 2018-02-14 마찰 댐퍼
CN201880001120.XA CN108811507A (zh) 2017-03-03 2018-02-14 摩擦减震器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-040202 2017-03-03
JP2017040202A JP2018146002A (ja) 2017-03-03 2017-03-03 摩擦ダンパ

Publications (1)

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WO2018159296A1 true WO2018159296A1 (fr) 2018-09-07

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JP (1) JP2018146002A (fr)
KR (1) KR20180109967A (fr)
CN (1) CN108811507A (fr)
TW (1) TW201837337A (fr)
WO (1) WO2018159296A1 (fr)

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KR102429385B1 (ko) * 2020-08-24 2022-08-03 한국교통대학교산학협력단 마찰저항에 기반한 수직감쇠 보강형 면진장치

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113331A (ja) * 1982-12-20 1984-06-30 Tokai Rubber Ind Ltd 軸ばね装置
JPH10238579A (ja) * 1997-02-25 1998-09-08 Tomoe Corp 構造部材用エネルギー吸収装置
JPH11294532A (ja) * 1998-04-03 1999-10-29 Kayaba Ind Co Ltd 減衰装置
JP2006507460A (ja) * 2002-11-22 2006-03-02 ザ ゲイツ コーポレイション 摩擦減衰ストラット
JP3126640U (ja) * 2006-08-23 2006-11-02 水泉 趙 車両揺れ止めアセンブリ構造
JP2008221946A (ja) * 2007-03-09 2008-09-25 Toyota Motor Corp 弾性部材
JP2015203441A (ja) * 2014-04-14 2015-11-16 株式会社ビービーエム 構造物用制振ダンパー

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113331A (ja) * 1982-12-20 1984-06-30 Tokai Rubber Ind Ltd 軸ばね装置
JPH10238579A (ja) * 1997-02-25 1998-09-08 Tomoe Corp 構造部材用エネルギー吸収装置
JPH11294532A (ja) * 1998-04-03 1999-10-29 Kayaba Ind Co Ltd 減衰装置
JP2006507460A (ja) * 2002-11-22 2006-03-02 ザ ゲイツ コーポレイション 摩擦減衰ストラット
JP3126640U (ja) * 2006-08-23 2006-11-02 水泉 趙 車両揺れ止めアセンブリ構造
JP2008221946A (ja) * 2007-03-09 2008-09-25 Toyota Motor Corp 弾性部材
JP2015203441A (ja) * 2014-04-14 2015-11-16 株式会社ビービーエム 構造物用制振ダンパー

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JP2018146002A (ja) 2018-09-20
CN108811507A (zh) 2018-11-13
TW201837337A (zh) 2018-10-16

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