EP0019019B1 - Dispositif limiteur de couple pour clé à douille - Google Patents

Dispositif limiteur de couple pour clé à douille Download PDF

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Publication number
EP0019019B1
EP0019019B1 EP79300809A EP79300809A EP0019019B1 EP 0019019 B1 EP0019019 B1 EP 0019019B1 EP 79300809 A EP79300809 A EP 79300809A EP 79300809 A EP79300809 A EP 79300809A EP 0019019 B1 EP0019019 B1 EP 0019019B1
Authority
EP
European Patent Office
Prior art keywords
clutch
housing
torque
ring
socket
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
Application number
EP79300809A
Other languages
German (de)
English (en)
Other versions
EP0019019A1 (fr
Inventor
Lee Fu-Tsai
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 EP79300809A priority Critical patent/EP0019019B1/fr
Priority to DE7979300809T priority patent/DE2965839D1/de
Priority to AT79300809T priority patent/ATE4096T1/de
Priority to DE197979300809T priority patent/DE19019T1/de
Publication of EP0019019A1 publication Critical patent/EP0019019A1/fr
Application granted granted Critical
Publication of EP0019019B1 publication Critical patent/EP0019019B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers

Definitions

  • This invention relates to a device for a torque wrench for coupling a torque handle to a socket.
  • the conventional torque wrench is generally provided with no torque indicating means and is prone to distorting or breaking a nut of an article when the torsion applied thereto is too great. Conversely, the nut loosens and becomes insecure when the torque applied is insufficient. For example, spark plugs and various nuts and bolts used in automobiles and motorcycles, and fittings for home electrical appliances require tightening to a specific torque value.
  • torque wrench has an indicating disc on a handle thereof and an indicator on a rectangular plug thereof.
  • it is considerably bulky and is inconvenient to use.
  • it requires close attention to be paid to the indicating disc and the indicator thereof while being used to ensure that the desired torque is not exceeded. In this case, only a skilled operator can make good use of the torque wrench.
  • United States Patent Specification No. 3,889,490 describes a simple form of torque wrench which is locked by means of a screw.
  • United States Patent Specification No. 3,001,430 describes a torque limiting screwdriver with a ball detent mechanism arranged to transmit the torque force.
  • An object of the present invention is to provide an improved socket joint for a torque wrench.
  • the present invention provides a torque limiting device for a socket wrench comprising a torque limiting clutch for transmitting torque from the socket wrench to a socket, the clutch comprising two frictionally engaged clutch members; resilient means applying force to one of the clutch members to maintain said clutch members in engagement with one another, said force being adjustable; control means movable between a first position wherein said force is fixed and a second position enabling adjustment of said force; a substantially tubular housing telescopically engaged in a substantially tubular portion of a body and containing said torque limiting clutch for transmitting torque from the socket wrench to a socket, one of the clutch members being adapted for engagement in the socket and the other being coupled to said body by way of said resilient means, whereby rotation of said housing relative to said body adjusts said force applied by said means characterised in that said body is connectible at its end remote from said housing to said socket wrench and said control means comprises a controlling ring coaxially surrounding said body and rotatable relative thereto between said first and second positions, at least one torque transmitting ball element movably
  • Figure 1 shows a preferred device according to this invention comprising a body 10, a bolt 20, a rectangular plug 60, a clutch housing in the form of a casing 50, a clutch 70, a spring 80, a compressing ring 40, a controlling ring 30 in the form of a sleeve-like member and a positioning nut 90.
  • the body 10 is in the form of a cylinder having a cylindrical portion or chamber 11 situated at its lower end as seen in Fig. 1 so as to receive the clutch casing 50. Situated adjacent the opposite, upper end of the chamber 11 is a screw-threaded axial blind bore 12 which engages with one end of the bolt 20. A plurality of small screw-threaded radial bores 13 is provided in the body 10 opening into the bore 12 for receiving screws 25 which secure the bolt 20 in position. A plurality of through holes 16 are provided in the wall 15 of the chamber 11 so as to receive a plurality torque transmitting elements in the form of balls 17 each having a diameter greater than the thickness of the wall 15 of the chamber 11.
  • the upper end of the body 10 is provided with an axial socket 18 of rectangular cross-section so as to receive a rectangular plug of a torque wrench (not shown).
  • the outer periphery of the body 10 is engraved with a plurality of lines 19 (Figs. 4 and 5) corresponding in number to recesses in the form of guiding flutes 53 of the clutch casing 50 and indicating lines and symbols 55 engraved on the outer wall of the casing 50.
  • One end of the bolt 20 engages in the bore 12 as described above; the other end thereof engages in a screw threaded axial bore 93 in the positioning nut 90.
  • the controlling ring 30 is a sleeve-like fit around the outer wall of the chamber 11 and at each end has a respective annular recess 31, 32 in the form of increased internal diameter portions so as to protect wholly the compressing ring 40 and the outer wall of the body 10 in part.
  • a protruding pin 33 is provided on the controlling ring 30 and engages in an arcuate groove 42 in an upper surface 41 of the compressing ring 40 so that rotation of the controlling ring 30 relative to the ring 40 is limited.
  • the outer wall of the controlling ring 30 is provided with an indicating means 34 (Figs. 4 and 5) showing the states of "ON" and "OFF” each of which can be brought into alignment with an arrow on the body 10 to indicate whether torsion is "ON" or "OFF".
  • the inner wall 35 of the ring 30 is provided with a plurality of longitudinal grooves 36 to receive the balls 17. A slanting rim of each groove 36 facilitates insertion and removal of said balls 17.
  • the inner diameter of the compressing ring 40 is equal to the outer diameter of the wall 15 so that said compressing ring 40 is a tight fit over the body 10.
  • the outer diameter of the ring 40 is somewhat smaller than inner diameter of the recess 32 of the ring 30 so as to enable the controlling ring 30 to rotate freely.
  • the clutch casing 50 is a hollow cylindrical tube provided with a radially inwardly directed annular flange 51 at a lower end of its inner wall to receive the rectangular plug 60 and clutch 70.
  • the positioning nut 90 is secured to the clutch casing 50 by inserting one or more pins 95 through holes 52 and 92 in the casing 50 and positioning nut 90 respectively.
  • the spring 80 is positioned between the bolt 20 and clutch 70.
  • a plurality of guiding flutes 53 are provided on the outer wall of the casing 50 so as to partially receive the balls 17.
  • a plurality of indicating lines and symbols 55 are engraved on the outer wall thereof to indicate the strength of the torque applied thereto.
  • the plug 60 rests against the protruding ring 51 with its rectangular portion projecting at one end and is designed to connect with a socket of an article.
  • the other end of the plug 60 is formed as one clutch member 701 with teeth to engage with teeth 71 on a second clutch member 702.
  • the clutch members 701, 702 as shown in Figure 1 have symmetrical teeth.
  • Figure 6 shows a further preferred embodiment of the clutch; one contacting face thereof is provided with a plurality of protrusions 711 while another face thereof is provided with several cavities 712 corresponding to the protrusions 711.
  • a locating means 72 is situated to position said spring 80 on the clutch.
  • the positioning nut 90 has a cylindrical outer wall 91 provided with two said circular holes 92 to enable it to be secured to the clutch casing 50 as described hereinbefore.
  • the inner wall of the nut 90 is provided with the bore 93 as previously mentioned permitting movement of the clutch casing 50 with respect to the body 10 so as to adjust the tension of the spring 80 and to adjust the torque applied by the socket joint.
  • FIGs 2, 3 and 4 show how the socket joint of this invention is fitted to a torque wrench.
  • a plug of a torque wrench 100 is inserted in the rectangular socket 18.
  • the rectangular plug 60 then engages with a socket of an article requiring torque.
  • the controlling ring 30 is rotated to the indicating means 34 to bring the "OFF" indicating means 34 adjacent the arrow on the body 10 the balls 17 which are held in engagement in the flutes 53 by the inner wall of the ring 30 will engage in the grooves 36 of the controlling ring 30. This allows the balls to rise out of the flutes 53 (Fig. 2) and allows rotation of the body 10 relative to the casing 50.
  • Rotating the body 10 relative to the casing 50 screws the bolt 20 into or out of the positioning nut 90 thus drawing the casing 50 into or out of the body 10 and adjusting the force of the spring 80 acting on the clutch member 702.
  • Torque is indicated by the lines and symbols 55 and 19 engraved on the clutch casing 50 and body 10.
  • the controlling ring 30 is then rotated to bring the "ON" indicating means 34 adjacent the arrow on the body 10 to force the balls 17 into the guiding flutes 53 and hold them in position to prevent relative rotation of the body 10 and casing 50 (as shown in Figure 2).
  • the force of the spring 80 is such that while the set torque is not exceeded the clutch members will be held in engagement. Once the torque is exceeded the teeth on the members 701, 702 will ride over one another.
  • the pre-decided amount of the torque may be changed if need be.
  • the socket joint of this invention is also applicable to a non-ratchet type torque wrench handle 200 as shown in Figure 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Claims (11)

1. Dispositif limiteur de couple pour une clé à douille (100), comprenant un embrayage (70) limiteur de couple adapté pour transmettre ce couple de la clé à la douille et comportant deux organes d'embrayage (701-702) engagés entre eux par frottement; des moyens élastiques (80) appliquant une force à l'un (701) des organes d'embrayage afin de maintenir ces derniers en contact l'un avec l'autre, cette force étant réglable; des moyens de contrôle (30) mobiles entre une première position où ladite force est fixe et une seconde position permettant le réglage de cette force; un manchon (50) sensiblement tubulaire engagé de manière télescopique dans une partie (15) sensiblement tubulaire du corps (10) de la clé et adapté pour loger l'embrayage (70) limiteur de couple conçu pour transmettre ce couple de la clé à la douille, l'un des organes (701) d'embrayage étant adapté pour être engagé par son nez (60) dans la douille, et l'autre (702) étant accouplé audit corps (10) de clé par l'intermédiaire des moyens élastiques (80), dispositif caractérisé par le fait que le corps (10) de clé est raccordé par son extrémité arrière à la douille par l'intermédiaire dudit manchon et que lesdits moyens de contrôle (30) comprennent une bague réglable coaxialement autour du corps (10) et pouvant tourner par rapport à celui-ci entre une première et une seconde position, au moins une bille (17) de transmission de couple étant disposée de manière mobile, dans un trou (16) traversant la paroi de la partie tubulaire (15) du corps (10), et ayant un diamètre plus fort que l'épaisseur de cette paroi de manière à saillir du trou (16); le manchon (50) étant pourvu de plusieurs évidements (53) situés radialement dans sa surface extérieure et adaptés pour recevoir partiellement la bille de transmission de couple lorsque la bague de contrôle est dans sa première position afin d'empêcher la rotation du manchon par rapport au corps, cette bague de contrôle (30) ayant au moins un évidement (36) formé radialement dans sa surface intérieure pour recevoir la bille de transmission de couple lorsqu'elle se trouve dans ladite seconde position et afin de permettre la rotation dudit manchon par rapport au corps (10), la partie tubulair de ce dernier comportant un goujon axial (20) fileté sur lequel est vissé ledit manchon par suite de la rotation du corps (10) par rapport à lui, lesdits moyens élastiques étant constitués par un ressort de compression à boudin situé entre le goujon fileté et l'organe d'embrayage (702) lui faisant face.
2. Dispositif selon la revendication 1, caractérisé par le fait que les évidements (53, 36) sont allongés axialement.
3. Dispositif selon l'une ou l'autre des revendications 1 ou 2, caractérisé par le fait que le bord de l'évidement (36) situé dans la bague de contrôle (30) est en forme de rampe.
4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que le manchon (50) porte, gravée sur sa surface extérieure, une ligne de signes indicateurs, cette ligne étant plus courte que la longueur de chacun des évidements (53) situés sur cette surface extérieure.
5. Dispositif selon la revendication 4, caractérisé par le fait que le corps (10) de clé comporte sur sa surface extérieure plusieurs signes indicateurs (19) disposés pour coopérer avec les signes indicateurs gravés sur la surface extérieure du manchon (50).
6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que la bague de contrôle (30) est pourvue de moyens indicateurs (34) sur sa surface extérieure.
7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé par le fait que la face de l'un des organes d'embrayage (701) est pourvue de plusieurs saillies (711) et la face correspondante de l'autre organe d'embrayage (702), située en regard de la face précédente, est pourvue d'évidements correspondant auxdites saillies.
8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé par le fait que les faces opposées et coopérantes des deux organes d'embrayage (701, 702) sont pourvues de dents adaptées pour être en prise entre elles.
9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé par le fait que l'un des organes d'embrayage (701) de l'embrayage (70) comporte solidairement un nez carré (60) adapté pour s'engager dans la douille de la clé.
10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé par le fait qu'une bague (40) est fixée à la partie tubulaire (15) du corps de la clé et est engagée dans un évidement annulaire (32) de la bague de contrôle (30), cet évidement (32) ainsi que la bague (40) comportant chacun un ergot adapté pour s'engager dans une rainure arquée (42) correspondante de cet évidement (32) et de la bague (40) afin de limiter la rotation de la bague de contrôle (30) par rapport au corps (10) de la clé.
11. Dispositif selon la revendication 10, caractérisé par le fait que chaque ergot (33) est monté dans l'évidement annulaire (32) et est engagé dans la rainure arquée (42) correspondante de la bague (40).
EP79300809A 1979-05-11 1979-05-11 Dispositif limiteur de couple pour clé à douille Expired EP0019019B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP79300809A EP0019019B1 (fr) 1979-05-11 1979-05-11 Dispositif limiteur de couple pour clé à douille
DE7979300809T DE2965839D1 (en) 1979-05-11 1979-05-11 Device for a torque wrench
AT79300809T ATE4096T1 (de) 1979-05-11 1979-05-11 Vorrichtung fuer schraubenschluessel.
DE197979300809T DE19019T1 (de) 1979-05-11 1979-05-11 Vorrichtung fuer schraubenschluessel.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP79300809A EP0019019B1 (fr) 1979-05-11 1979-05-11 Dispositif limiteur de couple pour clé à douille

Publications (2)

Publication Number Publication Date
EP0019019A1 EP0019019A1 (fr) 1980-11-26
EP0019019B1 true EP0019019B1 (fr) 1983-07-13

Family

ID=8186372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79300809A Expired EP0019019B1 (fr) 1979-05-11 1979-05-11 Dispositif limiteur de couple pour clé à douille

Country Status (3)

Country Link
EP (1) EP0019019B1 (fr)
AT (1) ATE4096T1 (fr)
DE (2) DE2965839D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11878393B2 (en) 2020-10-09 2024-01-23 Milwaukee Electric Tool Corporation Clutch socket adapter for a tool

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8729687D0 (en) * 1987-12-21 1988-02-03 Mcauley C H Spanners
DE102006032812B4 (de) * 2005-08-19 2012-06-21 Chia-Chiung Chuang Übertragungselement mit Drehmoment begrenzender Schutzstruktur
WO2015109191A1 (fr) 2014-01-17 2015-07-23 DePuy Synthes Products, Inc. Instrument de restriction de couple
TWI649166B (zh) 2014-01-17 2019-02-01 美商德派信迪思產品公司 扭矩限制器具（二）
CN108562390B (zh) * 2018-05-23 2024-05-14 兴机电器集团有限公司 断路器底盘车定扭矩摇把

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1254549B (de) * 1955-02-07 1967-11-16 Licentia Gmbh Elektrowerkzeug mit einer zum Loesen von Einsteckwerkzeugen axial verschiebbaren Muffe und einer Rutschkupplung mit Feder
US3001430A (en) * 1958-12-22 1961-09-26 James W Cranford Predetermined torque release tool
US3442360A (en) * 1967-10-04 1969-05-06 Charles Fulop Power operated,predetermined torque release,bolt driver
US3889490A (en) * 1974-05-16 1975-06-17 Felix J Nadolny Torque control adaptor for ratchet wrench
US3942337A (en) * 1974-09-16 1976-03-09 Industrial Analytics Inc. Torque limiting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11878393B2 (en) 2020-10-09 2024-01-23 Milwaukee Electric Tool Corporation Clutch socket adapter for a tool

Also Published As

Publication number Publication date
DE19019T1 (de) 1983-04-14
DE2965839D1 (en) 1983-08-18
EP0019019A1 (fr) 1980-11-26
ATE4096T1 (de) 1983-07-15

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