JPS58217804A - Hydraulic cylinder - Google Patents

Hydraulic cylinder

Info

Publication number
JPS58217804A
JPS58217804A JP9839682A JP9839682A JPS58217804A JP S58217804 A JPS58217804 A JP S58217804A JP 9839682 A JP9839682 A JP 9839682A JP 9839682 A JP9839682 A JP 9839682A JP S58217804 A JPS58217804 A JP S58217804A
Authority
JP
Japan
Prior art keywords
cylinder tube
piston
piston rod
female
male thread
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.)
Pending
Application number
JP9839682A
Other languages
Japanese (ja)
Inventor
Akira Sugimoto
旭 杉本
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.)
ROUDOUSHIYOU SANGYO ANZEN KENKYUSHO
Original Assignee
ROUDOUSHIYOU SANGYO ANZEN KENKYUSHO
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 ROUDOUSHIYOU SANGYO ANZEN KENKYUSHO filed Critical ROUDOUSHIYOU SANGYO ANZEN KENKYUSHO
Priority to JP9839682A priority Critical patent/JPS58217804A/en
Publication of JPS58217804A publication Critical patent/JPS58217804A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
    • F15B15/068—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the helical type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

PURPOSE:To suppress creation of a stick slip phenomenon by threadably engaging the male thread formed on a piston rod with the female thread formed on a part of a cylinder tube. CONSTITUTION:A piston rod 4 which passes through a cylinder tube 1 has a male thread 6 thereon, while the cylinder tube 1 has a female threaded part 7 mounted inside. The male thread 6 and a female thread 8 of said part 7 engage each other. When pressure fluid is supplied into the cylinder tube from a fluid supply and discharge port 5, a piston 2 and the piston rod 4 is forced to make screwing movement with respect to the tube 1 in the direction A as shown by the arrow due to the engagement of the male thread 6 and the female thread 8. The axial component of friction force which acts between a seal member 3 of the piston 2 and the cylinder tube 1 is therefore reduced, hence supressing creation of the stick slip phenomenon.

Description

【発明の詳細な説明】 本発明は、空気圧シリンダ、油圧シリンダ等の流体圧シ
リンダに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to fluid pressure cylinders such as pneumatic cylinders and hydraulic cylinders.

従来の流体圧シリンダにおいては、スティック・スリッ
プ現象が大きく生じるため、位置制御を高精度に行えな
いとともに、動作を円滑にすることができない等の欠点
があった。In conventional fluid pressure cylinders, stick-slip phenomena occur to a large extent, so that position control cannot be performed with high precision, and the cylinders cannot operate smoothly.

本発明の目的は、スティック・スリップ現象を生じにく
い流体圧シリンダを提供することにある。An object of the present invention is to provide a fluid pressure cylinder that is less prone to stick-slip phenomena.

さて、前記スティック・スリップ現象は、ピストンどシ
リンダチューブとの間に軸方向に作用する摩擦力、並び
にピストンおよびピストン０ツドに軸方向に作用する慣
性力を小さくすることができれば、生じにくくなる。The stick-slip phenomenon will be less likely to occur if the frictional force acting in the axial direction between the piston and the cylinder tube and the inertia force acting in the axial direction on the piston and the piston end can be reduced.

本発明は、このことに着目してなされたものである。す
なわち、本発明による流体圧シリンダは、シリンダチュ
ーブど、このシリンダチューブに嵌合されたピストンと
、このビス１−ンに固定されたピストンロッドと、前記
シリンダチューブに対して固定された雌ねじ部と、前記
ピストンロッドに設けられ、前記部ねじ部に螺合された
雄ねじ部とを有してなることにより、ピストンおよびビ
ス１−ンＯツドが軸方向に移動する際、前記各ねじ部の
作用により、同ピストンおよびピストンロッドがシリン
ダチューブに対して回転するようにしたものである。The present invention has been made with this in mind. That is, the fluid pressure cylinder according to the present invention includes a cylinder tube, a piston fitted to the cylinder tube, a piston rod fixed to the screw 1, and a female screw portion fixed to the cylinder tube. and a male threaded part provided on the piston rod and screwed into the threaded part of the piston rod, so that when the piston and the screw bolt move in the axial direction, the action of each of the threaded parts is reduced. This allows the piston and piston rod to rotate relative to the cylinder tube.

以下、本発明を図面に示す実施例に基づいてさらに詳細
に説明する。Hereinafter, the present invention will be explained in more detail based on embodiments shown in the drawings.

第１図は、本発明を単動型の流体圧シリンダに適用した
実施例を示す。同図において、シリンダチューブ１には
、ビス１ヘン２が、同ピストン２の外周に取り（＝Ｉけ
られたシール材３を介して嵌合されている。このビス１
−ン２には、ピストンロッド４の一端部が固定されてい
る。また、前記シリンダチューブ１の一端部付近には、
流体給排口５が設けられており、同流体給排口５を介し
て、ピストン２の片側に空気圧、油圧等の流体圧が供給
されるようになっている。FIG. 1 shows an embodiment in which the present invention is applied to a single-acting type fluid pressure cylinder. In the same figure, a screw 1 and a screw 2 are fitted into the cylinder tube 1 through a sealing material 3 cut on the outer periphery of the piston 2.
- One end of a piston rod 4 is fixed to the ring 2. Further, near one end of the cylinder tube 1,
A fluid supply/discharge port 5 is provided, and fluid pressure such as air pressure or oil pressure is supplied to one side of the piston 2 via the fluid supply/discharge port 5.

前記ビス１ヘンロツド４の外周には、雄ねじ部６が設け
られている。他方、前記シリンダチューブ１の他端部付
近には、雌ねじ体７が固定されており、この雌ねじ体７
には、シリンダチューブ１と同軸に雌ねじ部８が設【）
られている。そして、この雌ねじ部８には、前記ピスト
ンロッド４の雄ねじ部６が螺合されている。A male threaded portion 6 is provided on the outer periphery of the screw rod 4. On the other hand, a female threaded body 7 is fixed near the other end of the cylinder tube 1.
A female threaded portion 8 is provided coaxially with the cylinder tube 1 [).
It is being The male threaded portion 6 of the piston rod 4 is screwed into the female threaded portion 8 .

前記シリンダチューブ１から突出されたピストンロッド
４の他端部には、軸受９を介して、出力軸１０が、ビス
１〜ンロツド４に対して相対的に回転自在かつ、同ロッ
ド４に対して軸方向に移動不能に連結されている。An output shaft 10 is attached to the other end of the piston rod 4 protruding from the cylinder tube 1 via a bearing 9, and is rotatable relative to the screws 1 to 4 and is rotatable relative to the rod 4. axially and immovably connected.

次に、本実施例の作動を説明する。Next, the operation of this embodiment will be explained.

流体給排口５を通してシリンダチューブ１内にある大き
さ以上の流体圧が供給されると、ピストン２およびピス
トンロッド４は、矢印Ａのように図上左方に向かって軸
方向に移動されるが、雄ねじ部６と雌ねじ部８とが螺合
されているので、前記軸方向の移動と同時に、ピストン
２およびビス１ヘンロツド４はシリンダチューブ１に対
して回転する。When fluid pressure greater than a certain level is supplied into the cylinder tube 1 through the fluid supply/discharge port 5, the piston 2 and piston rod 4 are moved axially toward the left in the figure as indicated by arrow A. However, since the male threaded portion 6 and the female threaded portion 8 are screwed together, the piston 2 and the screw rod 4 rotate with respect to the cylinder tube 1 at the same time as the movement in the axial direction.

したがって、この流体圧シリンダでは、ピストン２が移
動する場合に同ピストン２（シール材３）とシリンダチ
ューブ１との間に働く摩擦力の軸方向成分が小さくなる
ので、スティック・スリップ現象が生じにくくなる。Therefore, in this fluid pressure cylinder, when the piston 2 moves, the axial component of the frictional force that acts between the piston 2 (sealing material 3) and the cylinder tube 1 is small, so the stick-slip phenomenon is less likely to occur. Become.

その上、この流体圧シリンダでは、ピストン２およびピ
ストンロッド４に作用する慣性力の軸方向成分も小さく
なる。したがって、これによっても、さらにスティック
・スリップ現象が生じにくくなる。Moreover, in this fluid pressure cylinder, the axial component of the inertial force acting on the piston 2 and the piston rod 4 is also reduced. Therefore, this also makes it even more difficult for the stick-slip phenomenon to occur.

また、出力軸１０は、ピストンロッド４に対して相対的
に回転自在とされているため、軸線方向にのみピストン
ロッド４と一体的に運動づる。したがって、出力軸１０
からは、直線運動のみを取り出すことができる。。Furthermore, since the output shaft 10 is rotatable relative to the piston rod 4, it moves integrally with the piston rod 4 only in the axial direction. Therefore, the output shaft 10
Only linear motion can be extracted from . .

なお、本発明は、前記実施例のような単動型の流体圧シ
リンダに適用できるのみならず、復動型の流体圧シリン
ダにも適用できることは言うまでもない。It goes without saying that the present invention can be applied not only to a single-acting hydraulic cylinder as in the embodiment described above, but also to a double-acting hydraulic cylinder.

以上のように本発明による流体圧シリンダは、スティッ
ク・スリップ現象を生じにく（することができるという
優れた効果を得られるものである。As described above, the fluid pressure cylinder according to the present invention has the excellent effect of being less likely to cause stick-slip phenomena.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明による流体圧シリンダの一実施例を示す
縦断面図である。 １・・・シリンダチューブ、２・・・ピストン、４・・
・ピストンロッド、６・・・雄ねじ部、８・・・雌ねじ
部。 特許出願人　　　労働省産業安全研究所長所≠良　　川
　　口　　邦　　供FIG. 1 is a longitudinal sectional view showing an embodiment of a fluid pressure cylinder according to the present invention. 1... Cylinder tube, 2... Piston, 4...
- Piston rod, 6... Male threaded part, 8... Female threaded part. Patent applicant Ministry of Labor Industrial Safety Research Institute Advantages≠Good Kuni Kawaguchi

Claims (1)

【特許請求の範囲】[Claims] シリンダチューブと、このシリンダチューブに嵌合され
たピストンと、このピストンに固定されたピストンロッ
ドと、前記シリンダチューブに対して固定された雌ねじ
部と、前記ピストンロッドに設けられ、前記雌ねじ部に
螺合された雄ねじ部とを有してなる流体圧シリンダ。A cylinder tube, a piston fitted into the cylinder tube, a piston rod fixed to the piston, a female threaded portion fixed to the cylinder tube, and a female thread provided on the piston rod and threaded into the female threaded portion. A fluid pressure cylinder having mated male threaded portions.
JP9839682A 1982-06-10 1982-06-10 Hydraulic cylinder Pending JPS58217804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9839682A JPS58217804A (en) 1982-06-10 1982-06-10 Hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9839682A JPS58217804A (en) 1982-06-10 1982-06-10 Hydraulic cylinder

Publications (1)

Publication Number Publication Date
JPS58217804A true JPS58217804A (en) 1983-12-17

Family

ID=14218671

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9839682A Pending JPS58217804A (en) 1982-06-10 1982-06-10 Hydraulic cylinder

Country Status (1)

Country Link
JP (1) JPS58217804A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011052780A (en) * 2009-09-03 2011-03-17 Yasuda Kogyo Kk Cylinder device, and machine tool equipped therewith

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49389B1 (en) * 1970-02-17 1974-01-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49389B1 (en) * 1970-02-17 1974-01-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011052780A (en) * 2009-09-03 2011-03-17 Yasuda Kogyo Kk Cylinder device, and machine tool equipped therewith

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