WO2016060126A1 - ショックアブソーバ - Google Patents

ショックアブソーバ Download PDF

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Publication number
WO2016060126A1
WO2016060126A1 PCT/JP2015/078945 JP2015078945W WO2016060126A1 WO 2016060126 A1 WO2016060126 A1 WO 2016060126A1 JP 2015078945 W JP2015078945 W JP 2015078945W WO 2016060126 A1 WO2016060126 A1 WO 2016060126A1
Authority
WO
WIPO (PCT)
Prior art keywords
shock absorber
cover member
cap member
peripheral surface
locked
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/JP2015/078945
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
覚 武尾
俊晴 河部
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 CN201580049176.9A priority Critical patent/CN107076248A/zh
Priority to DE112015004705.0T priority patent/DE112015004705T5/de
Priority to US15/511,393 priority patent/US20170292580A1/en
Publication of WO2016060126A1 publication Critical patent/WO2016060126A1/ja
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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/56—Means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke
    • 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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
    • 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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/38—Covers for protection or appearance
    • 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
    • F16F2230/00—Purpose; Design features
    • F16F2230/0023—Purpose; Design features protective
    • 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
    • F16F2230/00—Purpose; Design features
    • F16F2230/0041—Locking; Fixing in position

Definitions

  • the present invention relates to a shock absorber.
  • a shock absorber used for an automobile or the like, it is known to enclose a compressed gas in a tube in order to prevent cavitation of hydraulic fluid.
  • Such a shock absorber is normally in the most extended state due to the reaction force of the compressed gas.
  • a shock absorber described in JP2009-36265A includes a lock member provided at an end of a tube on a side where a piston rod extends, and a cover member provided on a tip end side of the piston rod. By engaging the engaging portions respectively formed with the members, the members are held in a contracted state.
  • the engaging portion of the lock member is formed by cutting and raising the lock member on the cover member side
  • the engaging portion of the cover member is formed by cutting and raising the cover member on the lock member side.
  • An object of the present invention is to provide a shock absorber that can be held in a contracted state while suppressing an influence on a stroke.
  • a shock absorber a tube having a piston rod extending from one end thereof, and a cap provided at an end portion on the one end side of the tube and having an engaging portion formed on an outer peripheral surface thereof.
  • a member, and a cover member provided on a distal end side of the piston rod and having a locked portion that is locked to the locking portion on an inner peripheral surface thereof, and the locked portion of the cover member Is provided with a shock absorber that is held in a contracted state by being locked to the locking portion of the cap member.
  • FIG. 1 is a partial cross-sectional view showing a shock absorber according to a first embodiment of the present invention.
  • FIG. 2 is a development view of the cap member.
  • FIG. 3 is a partial cross-sectional view showing a shock absorber according to the second embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a modification of the cover member.
  • FIG. 5 is a diagram illustrating a modified example of the cap member.
  • the shock absorber 100 is a device that is interposed between a vehicle body and an axle of an automobile (not shown), for example, and generates a damping force to suppress the vibration of the vehicle body.
  • the shock absorber 100 is provided at a tube 1 in which hydraulic oil is sealed, a piston rod 2 extending from the tube 1, and an end of the tube 1 on the side where the piston rod 2 extends.
  • a cap member 3 a cover member 4 provided at the tip of the piston rod 2, and an outer cover 5 attached to the cover member 4.
  • the shock absorber 100 may be a single cylinder type or a multiple cylinder type.
  • the tube 1 is a cylinder.
  • the shock absorber 100 is a double cylinder type, the tube 1 is an outer tube.
  • the tube 1 is filled with a working fluid and a compressed gas for preventing cavitation of the working fluid.
  • the piston rod 2 is inserted into the tube 1 so as to freely advance and retract.
  • a male screw 2 a for attaching the shock absorber 100 to the vehicle body is formed at the end of the piston rod 2 on the side extending from the tube 1.
  • the cap member 3 is a bottomed cylindrical press-formed product, and is press-fitted into the end of the tube 1.
  • concave portions 3 b as locking portions are formed at four portions equally in the circumferential direction.
  • the concave portion 3b includes a vertical groove portion 3c extending in the axial direction, and a horizontal groove portion 3d extending in the circumferential direction connected to the vertical groove portion 3c.
  • the end portion of the lateral groove portion 3d is a wide portion 3f whose width is widened toward the top surface 3e side of the cap member 3.
  • the cap member 3 of the present embodiment is formed by bending an annular metal plate 6 at a position indicated by a broken line, as shown in FIG.
  • the recess 3 b of the cap member 3 is formed by providing an L-shaped slit 6 a in the metal plate 6.
  • the end on the center side of the metal plate 6 in the slit 6a is provided across the bending position (broken line).
  • the longitudinal groove 3c extends to the top surface 3e.
  • the recess 3b will be described in detail later.
  • the cover member 4 is a bottomed cylindrical press-formed product, and is fixed to the tip end side of the piston rod 2 by welding or the like.
  • convex portions 4c as locked portions are formed at four portions in the circumferential direction equally divided by cutting and raising the cylindrical portion 4a to the piston rod 2 side. The convex portion 4c will be described in detail later.
  • the outer cover 5 has a cylindrical shape, and one end is fixed to the cylindrical portion 4a of the cover member 4 by welding or the like.
  • the length of the outer cover 5 is set so as to reach the end of the tube 1 on the cap member 3 side when the shock absorber 100 is in its maximum extension state. Thereby, the outer cover 5 protects the piston rod 2 from a stepping stone or the like during traveling of the automobile.
  • the shock absorber 100 includes the cap member 3 as described above. For this reason, the annular gap between the outer cover 5 and the cap member 3 is narrower than the annular gap between the outer cover 5 and the tube 1 when the cap member 3 is not provided. Thereby, the entry of dust or the like to the sliding surface side of the piston rod 2 is reduced.
  • the compressed gas is sealed in the tube 1 of the shock absorber 100.
  • the piston rod 2 retracts from the tube 1 due to the reaction force of the compressed gas, and is normally in the most extended state.
  • the shock absorber 100 can be held in a contracted state by locking the convex portion 4 c provided on the cover member 4 by the concave portion 3 b provided on the cap member 3.
  • the shock absorber 100 When the shock absorber 100 is held in the contracted state, first, the piston rod 2 is rotated to align the rotational direction positions of the convex portion 4c of the cover member 4 and the vertical groove portion 3c in the concave portion 3b of the cap member 3. Then, the shock absorber 100 is contracted to cause the convex portion 4c to enter the vertical groove portion 3c. When the shock absorber 100 is contracted to the position where the convex portion 4c and the lateral groove portion 3d are aligned in the circumferential direction, the piston rod 2 is rotated to move the convex portion 4c to the position of the wide portion 3f. Thereby, the convex part 4c is latched by the wide part 3f, and the shock absorber 100 is held in a contracted state against the reaction force of the compressed gas.
  • the convex portion 4c In a state where the convex portion 4c is locked to the wide portion 3f, the convex portion 4c comes into contact with the step between the wide portion 3f and the lateral groove portion 3d, and the rotation of the piston rod 2 is restricted. Accordingly, the contracted state of the shock absorber 100 is not unintentionally released due to vibration or the like.
  • the shock absorber 100 When the shock absorber 100 is extended, the shock absorber 100 is contracted to a position where the convex portion 4c and the lateral groove portion 3d are aligned in the circumferential direction, and then the piston rod 2 is rotated to bring the convex portion 4c to the position of the vertical groove portion 3c. Move it.
  • the bottom portion of the cap member is cut and raised to the cover member side to form the engaging portion, and the top surface of the cover member is formed on the cap member side.
  • a structure in which the engaging portion is formed by cutting and raising the engaging portion and the engaging portion of the cap member and the engaging portion of the cover member are engaged can be considered.
  • the concave portion 3b is formed on the outer peripheral surface 3a of the cap member 3, and the convex portion 4c is formed on the inner peripheral surface 4b of the cover member 4.
  • the convex part 4c of the cover member 4 enters into the vertical groove part 3c of the cap member 3, and is moved to the horizontal groove part 3d,
  • the convex part 4c is latched by the recessed part 3b, and the shock absorber 100 is hold
  • the shock absorber 100 can be contracted until the convex portion 4c of the cover member comes into contact with the top surface 3e of the cap member 3. That is, according to the present embodiment, it is possible to realize a structure that holds the shock absorber in a contracted state while suppressing the influence on the stroke.
  • the concave portion 3b formed on the outer peripheral surface 3a of the cap member 3 is used as a locking portion
  • the convex portion 4c portion formed on the inner peripheral surface 4b of the cover member 4 is used as a locked portion.
  • the male screw 13b formed on the outer peripheral surface 13a of the cap member 13 is used as a locking portion
  • the screw 14b is used as a locked portion because it is formed on the inner peripheral surface 14a of the cover member 14. . Since other configurations are the same as those of the first embodiment, the same reference numerals are given and the description thereof is omitted.
  • the male screw 13b is formed on the outer peripheral surface 13a of the cap member 13, and the female screw 14b screwed to the male screw 13b is formed on the inner peripheral surface 14a of the cover member 14.
  • the shock absorber 200 is held in a contracted state by screwing the screw 14b formed on the inner peripheral surface 14a of the cover member 14 and the male screw 13b formed on the outer peripheral surface 13a of the cap member 13 together. For this reason, when the shock absorber 200 is contracted, the shock absorber 200 can be stroked until the female screw 14 b of the cover member 14 contacts the top surface 13 c of the cap member 13. Therefore, the structure which hold
  • the shock absorbers 100 and 200 are provided at the tube 1 from which the piston rod 2 extends from one end, and an end portion on one end side of the tube 1, and locking portions (concave portion 3 b and male screw 13 b) are provided on the outer peripheral surfaces 3 a and 13 a.
  • the locked portions (protrusions 4c and female screws 14b) of the cover members 4 and 14 are the locking portions of the cap members 3 and 13 ( It is characterized by being held in a contracted state by being locked to the recess 3b and the external thread 13b).
  • the locking portion of the shock absorber 100 is a concave portion 3b having a longitudinal groove portion 3c extending in the axial direction and a lateral groove portion 3d extending in the circumferential direction and continuing to the circumferential groove portion 3c.
  • a convex portion 4c formed on the inner peripheral surface 4b. The convex portion 4c of the cover member 4 enters the vertical groove portion 3c of the cap member 3 and moves to the horizontal groove portion 3d so that the convex portion 4c is locked to the concave portion 3b. It is characterized by being.
  • the shock absorber 100 when the shock absorber 100 is contracted, the shock absorber 100 can be stroked until the convex portion 4c of the cover member 4 comes into contact with the top surface 3e of the cap member 3. Therefore, it is possible to provide a shock absorber that can be held in a contracted state while suppressing the influence on the stroke.
  • the locking portion of the shock absorber 200 is a male screw 13b formed on the outer peripheral surface 13a of the cap member 13, and the locked portion is a screw 14b because it is formed on the inner peripheral surface 14a of the cover member 14.
  • the shock absorber 200 is held in a contracted state by screwing the female screw 14b of the cover member 14 and the male screw 13b of the cap member 13 together.
  • the shock absorber 200 can be stroked until the female screw 14b of the cover member 14 contacts the top surface 13c of the cap member 13 during the contraction operation of the shock absorber 200. Therefore, it is possible to provide a shock absorber that can be held in a contracted state while suppressing the influence on the stroke.
  • hydraulic oil is used as the hydraulic fluid of the shock absorbers 100 and 200, but other liquids such as water may be used.
  • the convex part 4c of the cover member is formed by cutting and raising the cylindrical part 4a to the piston rod 2 side, for example, as shown in FIG.
  • a protrusion that protrudes toward the piston rod 2 may be formed on the portion 4a to form the protrusion 4c.
  • the concave portion 3b of the cap member 3 is formed by providing the metal plate 6 with an L-shaped slit 6a.
  • the recess 3 b may be formed by providing notches 7 a and 7 b in the 7.
  • the notch 7a corresponds to the vertical groove portion 3c
  • the notch 7b corresponds to the wide portion 3f
  • the outer peripheral portion 7c of the metal plate 7 corresponds to the horizontal groove portion 3d.
  • the cap member 3 can be reduced in size, and material cost can be reduced.
  • the cap members 3 and 13 can also be resin molded products.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
PCT/JP2015/078945 2014-10-14 2015-10-13 ショックアブソーバ Ceased WO2016060126A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201580049176.9A CN107076248A (zh) 2014-10-14 2015-10-13 减震器
DE112015004705.0T DE112015004705T5 (de) 2014-10-14 2015-10-13 Stoßdämpfer
US15/511,393 US20170292580A1 (en) 2014-10-14 2015-10-13 Shock absorber

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-210058 2014-10-14
JP2014210058A JP6149020B2 (ja) 2014-10-14 2014-10-14 ショックアブソーバ

Publications (1)

Publication Number Publication Date
WO2016060126A1 true WO2016060126A1 (ja) 2016-04-21

Family

ID=55746670

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/078945 Ceased WO2016060126A1 (ja) 2014-10-14 2015-10-13 ショックアブソーバ

Country Status (5)

Country Link
US (1) US20170292580A1 (enExample)
JP (1) JP6149020B2 (enExample)
CN (1) CN107076248A (enExample)
DE (1) DE112015004705T5 (enExample)
WO (1) WO2016060126A1 (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019215746A1 (de) * 2019-10-14 2020-11-19 Zf Friedrichshafen Ag Dämpfereinrichtung für ein wenigstens ein Fahrzeugrad und eine Karosserie aufweisendes Kraftfahrzeug
WO2026154592A1 (ja) * 2025-01-16 2026-07-23 Ａｓｔｅｍｏ株式会社 緩衝器および緩衝器の製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62167946A (ja) * 1985-11-14 1987-07-24 モンロ−・オ−ト・イクイツプメント・カンパニ− ピストンロツド拘束クリツプ
JPH0684038U (ja) * 1993-05-18 1994-12-02 株式会社ユニシアジェックス ガススプリング
JP2004124994A (ja) * 2002-09-30 2004-04-22 Tokico Ltd シリンダ装置
JP2009036265A (ja) * 2007-07-31 2009-02-19 Hitachi Ltd シリンダ装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE460920B (sv) * 1988-12-12 1989-12-04 Ultra Tan Int Ab Gasfjaederanordning
JPH02132147U (enExample) * 1988-12-16 1990-11-02
JPH10325441A (ja) * 1997-05-23 1998-12-08 Kayaba Ind Co Ltd ガススプリング
JP5661580B2 (ja) * 2011-08-29 2015-01-28 株式会社吉野工業所 二重容器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62167946A (ja) * 1985-11-14 1987-07-24 モンロ−・オ−ト・イクイツプメント・カンパニ− ピストンロツド拘束クリツプ
JPH0684038U (ja) * 1993-05-18 1994-12-02 株式会社ユニシアジェックス ガススプリング
JP2004124994A (ja) * 2002-09-30 2004-04-22 Tokico Ltd シリンダ装置
JP2009036265A (ja) * 2007-07-31 2009-02-19 Hitachi Ltd シリンダ装置

Also Published As

Publication number Publication date
JP2016080023A (ja) 2016-05-16
CN107076248A (zh) 2017-08-18
US20170292580A1 (en) 2017-10-12
DE112015004705T5 (de) 2017-07-06
JP6149020B2 (ja) 2017-06-14

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