US3774470A - Detent positioning device - Google Patents

Detent positioning device Download PDF

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Publication number
US3774470A
US3774470A US00200311A US3774470DA US3774470A US 3774470 A US3774470 A US 3774470A US 00200311 A US00200311 A US 00200311A US 3774470D A US3774470D A US 3774470DA US 3774470 A US3774470 A US 3774470A
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US
United States
Prior art keywords
cam
roller
strap
actuator
rotary member
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.)
Expired - Lifetime
Application number
US00200311A
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English (en)
Inventor
J Cottin
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.)
PRODUMATIC CHATEAUNEUF EN THYM
Original Assignee
PRODUMATIC CHATEAUNEUF EN THYM
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.)
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Publication date
Application filed by PRODUMATIC CHATEAUNEUF EN THYM filed Critical PRODUMATIC CHATEAUNEUF EN THYM
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Publication of US3774470A publication Critical patent/US3774470A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D71/00—Mechanisms for bringing members to rest in a predetermined position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents

Definitions

  • the detent-positioning roller is carried by a rockerpivotally mounted in a strap rigid with the outer end of the actuator piston rod, sa-Id rocker being responsive to the action of spring means incorporated in said outer end of the piston rod.
  • this device is advantageous in that it ensures an accurate detent positioning of the rotary member in the angular position or positions contemplated when the roller engages a bottom dead center of said cam.
  • FIG. 1 is a part-sectional, part-elevational view of the rotary member and its detent positioning device, the section being taken atright angles to the axisof said rotary member and devices;
  • an actuator 5 comprising (see FIG. 2) a cylinder 6, a bottom 7, a piston and 8, a cylinder bottom packing seal 9, a piston packing in the cylinder, a piston-rod packing 11 in the cylinder, and a guide ring 13.
  • a strap 15 secured to the outer end of piston rod 8 carries a rocker l6 pivoted to said strap 15 about a pin 17, the angular excursion of this rocker being restricted by a check pin 18.
  • the rocker 16 rotatably carries a roller follower 19 by means of a pin 20, a needle bearing 21 being interposed between this pin andthe roller follower 19.
  • the above-described device operates as follows When the piston 8 is moved downwards by feeding fluid under pressure to the actuator chamber 27, the shaft 1 can rotatefreely.
  • the construction according to this invention implies the requirement When fluidunder pressure is fed to chamber 27, assuming that the shaft 1 is stationary, the assembly comprising the piston rod, the strap and the rocker is moved bodily towards the cam and the roller follower 19 engages the cam outline (FIG. If under these conditions, the roller 19 engages the cam outline at a point other than its top dead center, since the force F alone is sufficient for controlling the cam rotation, the springs 22 are substantially unstressed and the tocker 16 remains in engagement with the check pin 18.
  • the shaft 1 begins to rotate and this movement continues until the roller 19 engages the V-shaped notch 3 at the bottom dead center of cam 2 (FIG. 3b).
  • the rotational movement is discontinued, as the roller 19 acts as a lock bolt in said V-shaped notch 3 of cam 2.
  • the roller 19 is held against motion together with the piston 8; therefore, the thrust exerted by the actuator increases up to amaximum force F,. Since this force F, is greater than the force F developed by the stacked springs 22, these are compressed home, and the piston 8 and strap 15 continue their movement towards the cam, thus 'causing the rocker 16 to pivot about its fulcrum pin 17 until its opposite end 29 abutes the bottom of strap 15.
  • the roller 19 moves the cam 2 and shaft 1 to the right, as seen in the drawing, to their final angular position.
  • This position illustrated in FIG. 3c is extremely precise and reproducible since the roller position is strictly subordinate to the dimensions of the triangle having its apices at the point of contact between the roller follower 19 and the cam 2, the axis of pin 17 and the point of engagement of the rocker end 29 with the strap bottom.
  • the locking torque exerted on the shaft in this position depends on the maximum value F,, and besides the angle of the V-notch 3 in the cam may be determined at will without taking into account the value of F If the roller follower 19 engages the top dead center of cam 2 (FIG.
  • the chain-dotted cam contour 30 of FIG. 1 shown a modified form of embodiment of this invention giving two predetermined angular and locking positions for a same shaft.
  • This cam 30 comprises two top dead centers and two bottom dead centers.
  • a specific and advantageous feature of this cam is that the detent position time is reduced to one-half in comparison with the preceding form of embodiment. In fact, the maximum angle of rotation required with this cam 30 is 90, as contrasted with the 180 necessary with cam 2. However, this modified arrangement is applicable only if a shaft position of or 180 is contemplated in the desired mode of operation.
  • Detent positioning device for orienting and locking a rotary member in one or a plurality of angular positions, which comprises a rotary member a cam rigid with said rotary member, a roller follower engaging the outline of said cam, an actuator urging said roller follower against said cam outline, and means for automatically displacing the point of contact between the cam and roller so as to shift this point of contact in relation to the plane containing-the axes of the rotary member and of the roller, when said roller is at the top dead center of the cam.
  • Detent positioning device for orienting and locking a member rigid with a shaft adapted to revolve freely, which comprises a cam rigid with said shaft and having at least one dead center whereat the distance from the cam outline and the axis of said shaft has its minimum value, a hydraulic actuator having its piston rod directed towards the shaft axis, a push member slidably mounted in the piston rod of said actuator, spring means mounted in said piston rod coaxially to said push member for constantly urging said push member towards said cam, a strap rigid with said piston rod and having a bottom facing said cam, a pivot pin and a check pin mounted across said strap, a rocker mounted for free pivotal motion in said strap about said pivot pin and movable angularly between a lower position in which it engages the bottom of said strap and an upper position in which is abutes said check pin, a roller follower rotatably mounted on said rocker and adapted to engage the outline of said cam through the combined action of said actuator and said spring means, said rocker being adapted to remain in said upper position in said

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polarising Elements (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Transmission Devices (AREA)
US00200311A 1970-11-20 1971-11-19 Detent positioning device Expired - Lifetime US3774470A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7041781A FR2114255A5 (ja) 1970-11-20 1970-11-20

Publications (1)

Publication Number Publication Date
US3774470A true US3774470A (en) 1973-11-27

Family

ID=9064492

Family Applications (1)

Application Number Title Priority Date Filing Date
US00200311A Expired - Lifetime US3774470A (en) 1970-11-20 1971-11-19 Detent positioning device

Country Status (6)

Country Link
US (1) US3774470A (ja)
DE (1) DE2157552A1 (ja)
FR (1) FR2114255A5 (ja)
GB (1) GB1334091A (ja)
IT (1) IT944970B (ja)
SU (1) SU499832A3 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103472A (en) * 1989-08-28 1992-04-07 Kabushiki Kaisha Toshiba X-ray imaging apparatus
US5205538A (en) * 1991-12-09 1993-04-27 Caterpillar Inc. Detent mechanism for a fluid control valve
US6554305B2 (en) * 2001-06-21 2003-04-29 Delphi Technologies, Inc. Self-centering vehicle roll control system
US20030111823A1 (en) * 2001-01-19 2003-06-19 Kenichiro Kuboshima Side stand device for motorbike
CN113565474A (zh) * 2020-04-29 2021-10-29 中国海洋石油集团有限公司 一种完井防砂管柱用实时压力控制定位器

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3046606A1 (de) * 1980-12-11 1982-07-22 Volkswagenwerk Ag, 3180 Wolfsburg "teilbelagscheibenbremse fuer fahrzeuge, insebesondere kraftfahrzeuge"
GB2140884A (en) * 1983-02-22 1984-12-05 Compair Constr Mining Ltd Locating and holding means e.g. for the latch plate for the steel of a percussive roadbreaker
CN103671660A (zh) * 2013-11-18 2014-03-26 无锡市正阳机械有限公司 一种旋转固定装置
CN103591240B (zh) * 2013-11-21 2015-12-02 浙江宏华机械塑胶有限公司 一种精密直线运动装置
IT201600124647A1 (it) * 2016-12-09 2018-06-09 Ibs Motortech Italia Srl "sistema per la trasformazione reversibile di un moto alternato in moto rotatorio"
FR3130929B1 (fr) 2021-12-22 2023-11-24 Faurecia Systemes Dechappement Dispositif de stockage et d’alimentation en hydrogène et ensemble correspondant
FR3130933A1 (fr) 2021-12-22 2023-06-23 Faurecia Systemes D'echappement Unité de stockage de fluide cryogénique
FR3130928A1 (fr) 2021-12-22 2023-06-23 Faurecia Systemes D'echappement Dispositif de stockage et d’alimentation en hydrogène et ensemble correspondant
FR3130926A1 (fr) 2021-12-22 2023-06-23 Faurecia Systemes D'echappement Unité de stockage de fluide cryogénique
FR3130934A1 (fr) 2021-12-22 2023-06-23 Faurecia Systemes D'echappement Ensemble de stockage de fluide cryogénique
CN114645917B (zh) * 2022-01-29 2024-04-05 北京航天发射技术研究所 冲击作用下动态机构制动锁止装置及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001416A (en) * 1958-06-30 1961-09-26 Bobst And Son S A J Machines operating on sheets
US3373631A (en) * 1965-03-16 1968-03-19 Citroen Sa Andre Servo-steering systems for automobile vehicles
US3692149A (en) * 1971-05-26 1972-09-19 Allis Chalmers Mfg Co Cam actuated interlock for pivot arm

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001416A (en) * 1958-06-30 1961-09-26 Bobst And Son S A J Machines operating on sheets
US3373631A (en) * 1965-03-16 1968-03-19 Citroen Sa Andre Servo-steering systems for automobile vehicles
US3692149A (en) * 1971-05-26 1972-09-19 Allis Chalmers Mfg Co Cam actuated interlock for pivot arm

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103472A (en) * 1989-08-28 1992-04-07 Kabushiki Kaisha Toshiba X-ray imaging apparatus
US5205538A (en) * 1991-12-09 1993-04-27 Caterpillar Inc. Detent mechanism for a fluid control valve
US20030111823A1 (en) * 2001-01-19 2003-06-19 Kenichiro Kuboshima Side stand device for motorbike
US6964426B2 (en) * 2001-01-19 2005-11-15 Honda Giken Kabushiki Kaisha Side stand device for motorbike
US6554305B2 (en) * 2001-06-21 2003-04-29 Delphi Technologies, Inc. Self-centering vehicle roll control system
CN113565474A (zh) * 2020-04-29 2021-10-29 中国海洋石油集团有限公司 一种完井防砂管柱用实时压力控制定位器

Also Published As

Publication number Publication date
FR2114255A5 (ja) 1972-06-30
IT944970B (it) 1973-04-20
SU499832A3 (ru) 1976-01-15
GB1334091A (en) 1973-10-17
DE2157552A1 (de) 1972-05-31

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