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WO2003014584A1 - Filetage interieur de dent de scie inverse - Google Patents

Filetage interieur de dent de scie inverse Download PDF

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Publication number
WO2003014584A1
WO2003014584A1 PCT/JP2001/006788 JP0106788W WO03014584A1 WO 2003014584 A1 WO2003014584 A1 WO 2003014584A1 JP 0106788 W JP0106788 W JP 0106788W WO 03014584 A1 WO03014584 A1 WO 03014584A1
Authority
WO
WIPO (PCT)
Prior art keywords
flank
inverted
saw
inclination angle
clearance
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/JP2001/006788
Other languages
English (en)
Japanese (ja)
Inventor
Nobuyuki Sugimura
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PCT/JP2001/006788 priority Critical patent/WO2003014584A1/fr
Publication of WO2003014584A1 publication Critical patent/WO2003014584A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/30—Locking exclusively by special shape of the screw-thread

Definitions

  • the present invention relates to a reverse saw tooth screw used for an accumulator or the like.
  • a saw-toothed female screw is provided at the tip of the container body of the accumulator, and an external thread of the lid is screwed to the female screw.
  • the saw-toothed female screw is shaped like a combination of a square screw and a triangular screw, and one side of each female thread is provided with a pleated flank for receiving the load of the male screw, and the other side is provided with , Clearance flank is provided.
  • the angle of inclination of the flank flank is formed to be smaller than that of the clearance flank.For example, the angle of skew of the flank flank is formed at 7 °, and that of the clearance flank is formed at 45 °. Have been.
  • the diameter expansion becomes smaller when the inclination angle of the pleated flanks is small. For example, when the inclination angle is 7 °, the diameter expansion diameter is about 1/5 as compared with the case where the inclination angle is 30 °. For this reason, the distal end portion of the container main body hardly expands, so that the load of the external thread applied to the internal thread cannot be released to the next internal thread and is damaged.
  • the first to third largest female threads on the proximal end Since a load is applied and a particularly large tensile stress is generated at the root of the female thread, it often breaks from this point.
  • the present invention has been made in view of the above circumstances, and has as its object to prevent breakage of a female screw. Disclosure of the invention
  • An inverted saw-toothed screw according to the present invention includes a standard saw-toothed screw having a clearance flank and a pleated flank.
  • the pleated flank is an inverted clearance flank.
  • the inverted saw tooth screw according to the present invention is an inverted pleated flank which receives a load from the inverted clearance flank by reversing the shape of the flank flank and the shape of the clearance flank of the saw toothed female screw. Is formed.
  • a reverse saw tooth screw according to the present invention is characterized in that the inclination angle of the clearance flank of the saw tooth screw is set to the inclination angle of the inverted pleated flank receiving a load, and the clearance flank is shifted to the inverted flank. It is formed on an inverted clear flank smaller than the angle of the Tusha flank.
  • FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, and is an enlarged view of a main part of FIG. 3, and FIG. 2 shows a state where a reverse saw-toothed screw of FIG. 1 is under load.
  • FIG. 3 is an enlarged sectional view of a main part of FIG. 4, and FIG. 4 is a longitudinal sectional view showing an accumulator.
  • FIG. 5 is an enlarged longitudinal sectional view showing a second embodiment of the present invention
  • FIG. 6 is an enlarged longitudinal sectional view showing a third embodiment of the present invention
  • FIG. 7 is a fourth embodiment of the present invention. It is a longitudinal section enlarged view.
  • the accumulator ACC has a bladder 2 built in a container body 1.
  • the bladder 2 is a pleated bladder, which has a folding habit so as to be folded into a predetermined shape.
  • the flange 3 of the bladder 2 is locked to the upper part 1 a of the container body 1 and is fixed by the lid 5.
  • the lid 5 is provided with a supply / exhaust port 6 communicating with the inside of the bladder 2 and a male screw 21 screwed into the female screw 20 of the container body 1.
  • the internal thread 20 is an inverted saw-toothed female thread, and has two internal threads F1 to F12, but the internal thread F1 has a proximal end 20 D side of the internal thread 20. , And the female thread F12 is located on the tip 2 OW side.
  • This reverse saw female screw is a saw tooth female screw, for example, a saw tooth female screw with a pleated flank inclination angle of 15 ° and a clearance flank inclination angle of 45 °, a female screw thread F
  • the shape (tilt angle) of the clearance flank and the shape (tilt angle) of the clearance flank of 1 to F12 are opposite to each other.
  • the inclination angle of the pleated flank is formed at the inclination angle ⁇ of the inverted clearance flank 20 B.
  • the inclination angle of the inverted flank flank 20 A] 3 is the inclination angle of the clearance flank 45 °
  • the inclination angle ⁇ of the inverted clearance flank ⁇ is the inclination angle 1 of the pleated flank. 5 °.
  • the inverted pleated flank 20 A and the inverted clearance flank 32 B are continuous through the thread valley bottom 20 C.
  • the radius rl of this valley bottom 20 C is formed to 0.4 mm. ing.
  • the radius rl of the thread root is appropriately selected as necessary, but is preferably in the range of 1/10 to 1/3 of the thread pitch.
  • a through hole 10 is provided in the bottom 1 b of the container body 1, and a supply / discharge cylinder 13 is attached to the through hole 10 via an O-ring. Flange 1 of this supply / discharge cylinder 1 3 4 is pressed into contact with the receiving portion 11 of the through hole 10.
  • a port valve 16 with a cushion cup 15 is slidably supported on the supply / discharge cylinder 13. The supply / discharge cylinder 13 is fixed to the container body 1 by a nut 17. Next, the operation of the present embodiment will be described.
  • the load applied to the female thread F 1 is dispersed and generates a pressing force in the direction of arrow A 20, that is, an expanding force. It is elastically deformed and spreads outward while sliding on the side of one male thread M 1.
  • the inclination angle jS of the inverted pleated flank 20 A is 45 °, which is three times the pleated flank inclination angle 15 ° of the conventional example, so that the amount of circumferential displacement is greatly increased.
  • the load that cannot be covered by the female thread F 1 is released and is applied to the next thread F 2, and the load that cannot be fully loaded by the female thread F 2 is released and Thread F3.
  • the total load on the male screw is transmitted to the female threads F1 to F12.
  • the reverse plunger female screw has an inverted pleat flank 2 OA inclination angle] 3 of 50 ° and an inverted clearance.
  • Hula The inclination angle of the link 20B] 3 is 10 ° and the radius r1 of the female thread root is 0.21mm.
  • the inverted saw-toothed female screw is a stepped tapered female screw.
  • the female screw has a stepped portion 20X and a tapered portion 20Y.
  • the female threads F 1 to F 3 of the stepped portion 20 X are cut at the peaks, and the line connecting the peaks is a straight line L parallel to the center line 10 C of the accumulator.
  • the female threads F3 to F12 of the tapered portion 20Y are peak-cut, and the line connecting the peaks is a center line 10C from the base end 20D side toward the tip end 2OW side. Becomes a taper line T inclined in a direction approaching.
  • the embodiment of the present invention is not limited to the above, and may be, for example, as follows.
  • the flank with the smaller inclination angle (the surface receiving the load) is set as the lower surface of the female thread, and the one with the larger inclination angle
  • the saw-toothed screw in the reverse arrangement for example, with the top and bottom of the saw-toothed screw turned upside down, with the tip down and the base up
  • the flank with the larger inclination angle becomes the inverted pressure flank that receives the load
  • the flank with the smaller inclination angle becomes the inverted clearance flank.
  • the reverse saw-tooth female screw may be used.
  • the inclination angle of the inverted pleated flank] 3 may be appropriately selected within the range of 30 ° to 60 ° instead of being equal to the inclination angle of the clearance of the saw-tooth female screw.
  • the inclination angle 0 of the inverted clearance may be set to a different inclination angle.
  • the inclination angle ⁇ is formed to be smaller than the inclination angle / 3 of the inverted pleated flank, and the angle ⁇ is appropriately selected within a range of 0 ° to 15 °.
  • the inclination angle of the pret-shaft flank] 3 is 45 °, 0 ° is adopted as the reverse clearance inclination angle ⁇ .
  • the total load applied to the external thread was set to 33 26 20N, and the tensile load was calculated by the finite element method.
  • the maximum tensile stress (N ⁇ mm 2 ) of the female thread valleys of the peaks F 1 to F 12 was examined, the results shown in Table 1 below were obtained.
  • A is an inverted clear flank inclination angle of 15 °, an inverted pleated flank inclination angle of 45 °, a female screw root with a radius of 0.4mm and a reverse saw-toothed female screw (first embodiment)
  • B is an inverted shape clear lance flank angle of inclination 15 °, opposite the saw blade internally threaded (second embodiment) of radius 0.21mm tilt angle 45 ° female thread root of Gyakukatachi pre Tsu Shah Frank
  • C is the Gyakukatachiku 1 lance Frank Inclination angle 10 °, Inclination angle 50 of inverted pleatshaflank.
  • D is the inclination angle of the inverted clearance flank 15 °, the inclination angle of the inverted pleated flank 45 °, the radius of the female thread root 0.4mm, stepped taper inverted saw-tooth female screw (fourth embodiment),
  • E is a conventional serrated female screw with a clearance flank inclination angle of 7 °, a pleated flank inclination angle of 45 °, and a radius of 0.21 mm at the female thread root
  • F is a 60 ° triangular female thread.
  • the root tensile stress of the female threads F1 to F3 on the base end side is larger than that of the other female threads F4 to F12.
  • the female thread A, B, C, and D should have a lower root valley tensile stress than the other female threads E and F.
  • the tensile stress at the root of the female thread of A must be the smallest. 4
  • the root stress of the female screw thread A of the inverted saw tooth screw A is about 1 / 2.8 of that of the saw tooth screw E, which is extremely small.
  • the amount of displacement in the circular direction tends to increase as the female thread number increases.
  • the amount of displacement in the circular direction of the inverted saw-tooth female screws B and C is larger than that of the normal female screw F.
  • the amount of deviation in the circular direction is larger in the reverse saw tooth screw C than in the reverse saw tooth screw B, and the effect of the invention.
  • the inverted pleated flank receiving the load is formed at the inclination angle of the clearance flank of the saw toothed screw, the inclination angle of the load receiving surface is significantly larger than that of the saw toothed screw. Become larger. For this reason, the diameter expansion diameter is larger than in the conventional example, and the load borne by the female thread is reduced, so that the female thread can be prevented from being damaged.
  • the inverted saw-toothed screw according to the present invention is used not only for an internal pressure container such as an accumulator, but also for a female screw for power and the like with only one load on an inverted plenum flank.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

Dans la présente invention on effectue une opération pour que l'angle d'inclinaison (β) d'un flanc de dégagement d'un filetage intérieur de dent de scie devienne l'angle d'inclinaison (β) d'un flanc à pression inverse (20A) recevant une charge, et pour que l'angle d'inclinaison (υ) du flanc de pression devienne l'angle d'inclinaison (υ) d'un flanc de dégagement inverse (2B).
PCT/JP2001/006788 2001-08-07 2001-08-07 Filetage interieur de dent de scie inverse Ceased WO2003014584A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/006788 WO2003014584A1 (fr) 2001-08-07 2001-08-07 Filetage interieur de dent de scie inverse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/006788 WO2003014584A1 (fr) 2001-08-07 2001-08-07 Filetage interieur de dent de scie inverse

Publications (1)

Publication Number Publication Date
WO2003014584A1 true WO2003014584A1 (fr) 2003-02-20

Family

ID=11737624

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/006788 Ceased WO2003014584A1 (fr) 2001-08-07 2001-08-07 Filetage interieur de dent de scie inverse

Country Status (1)

Country Link
WO (1) WO2003014584A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101945528A (zh) * 2009-07-03 2011-01-12 日铁住金溶接工业株式会社 镶装刀片和等离子体炬管
JP2011014460A (ja) * 2009-07-03 2011-01-20 Nippon Steel & Sumikin Welding Co Ltd プラズマトーチ
JP2011014459A (ja) * 2009-07-03 2011-01-20 Nippon Steel & Sumikin Welding Co Ltd インサートチップおよびプラズマトーチ
WO2013146882A1 (fr) * 2012-03-29 2013-10-03 日立ツール株式会社 Tête d'usinage, support et outil de coupe à pointe échangeable
CN110005681A (zh) * 2018-04-07 2019-07-12 玉环胜友工具有限公司 类橄榄状对称双向锥形螺纹内螺纹与传统螺纹的连接结构
WO2019192567A1 (fr) * 2018-04-07 2019-10-10 玉环胜友工具有限公司 Structure de raccord de boulon et d'écrou à filetage conique bidirectionnel en forme d'haltère à petit cône gauche et à grand effilement droit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS354835B1 (fr) * 1956-02-08 1960-05-10
JPS4937214B1 (fr) * 1968-03-04 1974-10-07
JPS63125813A (ja) * 1986-11-14 1988-05-30 石川島建材工業株式会社 セラミツクス製物品
JPH02107824U (fr) * 1989-02-14 1990-08-28
JPH0477017U (fr) * 1990-11-20 1992-07-06
JPH08177831A (ja) * 1994-12-26 1996-07-12 Nkk Corp 耐遅れ破壊特性に優れた高力ボルト

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS354835B1 (fr) * 1956-02-08 1960-05-10
JPS4937214B1 (fr) * 1968-03-04 1974-10-07
JPS63125813A (ja) * 1986-11-14 1988-05-30 石川島建材工業株式会社 セラミツクス製物品
JPH02107824U (fr) * 1989-02-14 1990-08-28
JPH0477017U (fr) * 1990-11-20 1992-07-06
JPH08177831A (ja) * 1994-12-26 1996-07-12 Nkk Corp 耐遅れ破壊特性に優れた高力ボルト

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101945528A (zh) * 2009-07-03 2011-01-12 日铁住金溶接工业株式会社 镶装刀片和等离子体炬管
JP2011014460A (ja) * 2009-07-03 2011-01-20 Nippon Steel & Sumikin Welding Co Ltd プラズマトーチ
JP2011014459A (ja) * 2009-07-03 2011-01-20 Nippon Steel & Sumikin Welding Co Ltd インサートチップおよびプラズマトーチ
WO2013146882A1 (fr) * 2012-03-29 2013-10-03 日立ツール株式会社 Tête d'usinage, support et outil de coupe à pointe échangeable
US9868162B2 (en) 2012-03-29 2018-01-16 Hitachi Tool Engineering, Ltd. Machining head, holder and exchangeable tip cutting tool
CN110005681A (zh) * 2018-04-07 2019-07-12 玉环胜友工具有限公司 类橄榄状对称双向锥形螺纹内螺纹与传统螺纹的连接结构
WO2019192557A1 (fr) * 2018-04-07 2019-10-10 玉环胜友工具有限公司 Structure de prise de filetage interne et de filetage classique avec filetage conique bidirectionnel symétrique ayant une forme de type olive
WO2019192567A1 (fr) * 2018-04-07 2019-10-10 玉环胜友工具有限公司 Structure de raccord de boulon et d'écrou à filetage conique bidirectionnel en forme d'haltère à petit cône gauche et à grand effilement droit

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