WO2002042037A2 - Dispositif d'accouplement d'un organe et outil d'accouplement correspondant - Google Patents
Dispositif d'accouplement d'un organe et outil d'accouplement correspondant Download PDFInfo
- Publication number
- WO2002042037A2 WO2002042037A2 PCT/FR2001/003552 FR0103552W WO0242037A2 WO 2002042037 A2 WO2002042037 A2 WO 2002042037A2 FR 0103552 W FR0103552 W FR 0103552W WO 0242037 A2 WO0242037 A2 WO 0242037A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- groove
- locking element
- locking
- sleeve
- base body
- Prior art date
Links
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
- B25B23/0007—Connections or joints between tool parts
- B25B23/0035—Connection means between socket or screwdriver bit and tool
Definitions
- the present invention relates to a coupling device, in particular a coupling and driving device, of a particularly rotary member, in particular of the self-locking and self-locking type of the member, comprising a basic body which extends along a longitudinal axis and at the distal end of which is provided a coupling endpiece of the member, an axial groove being formed in the base body and extending from the external surface of the endpiece to '' at an intermediate zone of the base body, a generally elongated blocking element disposed in the groove, an element the distal end of which has a blocking point projecting radially outwards, the proximal part of this element being connected to spring means which bias the locking element axially towards the distal end of the base body, the locking element being axially movable between a first position, active, towards the attle the locking element is biased by said spring means and in which the member is secured to the device, and a second position, inactive, in which the member is separable from the device.
- This extension includes a base body which is provided with a socket drive endpiece.
- An axial groove is formed in the extension and extends from an intermediate region of the base body to the region of the end piece. The depth of the groove decreases towards the drive end.
- a blade is arranged and held by a ring in the bottom of the groove so that it can slide axially between an advanced position of axial locking of the sleeve and a retracted position of unlocking. In the advanced position, a locking point projects radially outward and engages in a complementary recess in the sleeve. In the retracted position, the tip is radially retracted into the groove and allows the sleeve to be separated from the extension.
- the latter comprises a sleeve connected to the blade.
- This sleeve is arranged coaxially on the base body and is axially displaceable.
- This device has a high manufacturing cost, in particular because of the numerous parts to be assembled.
- ratchet head heads are also known, the drive endpiece of which includes a self-latching socket retaining device.
- This device comprises a leaf spring arranged in an axial groove formed in the drive end piece.
- the end on the tip end of the spring is curved and forms a point for retaining the sleeve. This point protrudes from the outer surface of the nozzle.
- the device allows the radial retraction of the tip in order to release the socket.
- the device is not self-locking, that is to say that the application of a high tensile force on the sleeve releases the latter from the nozzle.
- the invention aims to overcome these drawbacks and to provide a connection of a drive device and a rotary member which has both self-latching and self-locking functions and which has a low manufacturing cost.
- the invention relates to a device of the aforementioned type, characterized in that in the first position, the locking point protrudes from the outside surface of the coupling end piece under the action of cooperating surfaces from the distal end of the locking element forming localized support and from the distal part of the groove forming a ramp also localized, the force resulting from the mutual support of said surfaces having a component directed radially outwards, and in the second position, the distal part of the blocking element is radially movable in the groove between a radially external position towards which it is urged elastically and a radially inner position in which the locking point is retracted in the groove.
- the device according to the invention may include one or more of the following characteristics:
- the locking element is urged elastically towards its radially external position by its own elasticity
- the surfaces of the distal end of the locking element and the distal part of the groove have the same inclination relative to the axis of the device; - the cooperating surfaces of the distal end of the blocking element and of the groove have complementary shapes, in particular a surface of concave shape while the other is of convex shape;
- the surface of the distal end of the groove is of concave shape, in particular of shape complementary to the tool for manufacturing the groove;
- the spring element is a spiral spring which extends coaxially around the base body and which is applied, proximal side, against a stop of the body base, this spiral spring comprising at least one non-contiguous part;
- the spring means and the locking element are formed in one piece, in particular in one piece; - the locking element is constituted by an extension of the spiral spring;
- a middle part of the groove is at least partially closed above the blocking element, in particular by crimping; - When the member is separated from the coupling end piece, the blocking element abuts against the means for closing said middle part of the groove;
- the locking element is connected at its proximal end to a sleeve which is arranged coaxially around the. base body, and the sleeve is biased by said spring means;
- the sleeve and the blocking element are made in one piece from a thin sheet-like material, especially sheet metal; - the locking element is connected to the proximal end of the sleeve; the locking element is connected to the distal end of the sleeve; the locking element is made of plastic;
- the spring element is made of plastic, in particular an elastomer; and all parts of the device are made of stainless steel.
- the invention further relates to a coupling tool, in particular coupling and drive, in particular extension or extension, characterized in that it comprises a device as defined above.
- Figure 1A is a sectional view along the line IA-IA of Figure 1;
- Figure 2 is a top view of the extension of Figure 1, in partial section;
- Figures 3 and 4 are views similar to Figures 1 and 2, the device being in the unlocked position;
- FIG. 5 is a schematic side view, in partial longitudinal section, of an extension comprising a second embodiment of a locking device according to the invention, in the locked position;
- FIG. 5A is a sectional view along the line
- FIG. 6 is a view similar to Figure 5, the locking device being in the unlocked position; and Figures 7A and 7B show parts of variants of the second embodiment of the locking device.
- FIG 1 there is shown an extension according to the invention designated by the general reference 2.
- a socket 4 is threaded and locked on this extension 2.
- the extension 2 comprises a base body 6 and a locking device 8 of socket 4 on the extension.
- the blocking device is movable between a first active position, self-blocking and locked, in which it prevents the socket 4 from separating from the extension 2 ( Figures 1 and 2), and a second inactive unlocked position in which the socket 4 can be separated from the extension ( Figures 3 and 4).
- first active position self-blocking and locked
- proximal will designate the direction turned to the opposite or to the right in FIG. 1.
- the socket 4 is of a conventional type and comprises, on the proximal side, a connection or coupling part 10 with a female profile of square section 12. A localized recess 14 is formed in each face of the profile 12.
- the socket 4 comprises, distal side, a part with an internal hexagonal or other profile 16 for driving a conjugated screw head.
- the base body 6 is of generally cylindrical shape having axis XX and comprises at its proximal end 18 a square profile female 20 of known type for connection or coupling to for example a ratchet wrench (not shown).
- the base body has a coupling and drive end piece 24 of square cross section which fits into the profile 12 of the sleeve.
- This end piece 24 includes a stop 28 for a chamfered front surface 29 of the sleeve.
- an axial groove 30 In the base body 6 is formed an axial groove 30. This groove extends from the outer surface of the middle of the drive end piece 24 into an intermediate region 26 of the base body 6. At the end distal of the groove 30, the depth of the latter gradually decreases towards the distal end. At this location, the groove bottom surface forms a ramp 32, planar and inclined relative to the axis XX of the base body, and converging towards the axis XX in the direction facing the proximal end of the end piece 24.
- the intermediate region 26 of the base body 6 comprises a cylindrical sliding surface 34 of axis X-X and of reduced diameter. This outer sliding surface 34 is limited on each side by a shoulder
- the sliding surface 34 is interrupted in its middle part by a cylindrical narrowing of axis X-X which forms a housing 40 of a helical or spiral spring 42 (see below).
- the transition between the housing 40 and the sliding surface 34 is formed on the proximal side by a shoulder 44 and the distal side by a chamfered surface 46.
- the locking device 8 comprises a locking element which is disposed in the groove 30.
- This element of blocking is a blade 48 made of thin sheet metal whose plane extends perpendicular to the plane of Figure 1.
- the distal end of this blade 48 is folded up on itself by forming a loop 50. In the form shown in Figures 1 to 3, the loop is folded up, that is to say in the opposite direction to the axis XX.
- the lower surface 52 of this loop 50 has an inclination complementary to the inclination of the ramp 32 of the groove 30. This inclination can be between 40 and 50 °, and is preferably 45 °.
- the upper surface of the loop 50 forms a locking point 54. In the locking position, as shown in FIG. 1, this locking point 54 protrudes from the surface of the drive end piece 24 and engages in a recess 14 in the socket 4.
- the blade 48 also has two side edges 56 folded 90 ° upwards (see Figure 1A). These lateral edges guide the blade laterally in the groove 30 and stiffen it longitudinally against bending in the plane of Figure 1.
- the blade 48 extends, in its active position, over its entire length, with the exception of its distal end, at a distance from the bottom of the groove 30, so that the surfaces of the ramp 32 and of the loop 50 are locally supported one on the other.
- the blade 48 ends on the proximal side by an elastic part 58 in the shape of a "C” devoid of the stiffening edges 56.
- This “C” part urges the blade 48 towards its blocking position by its own elasticity.
- the upper end of this part is integral with the proximal part of a sleeve 60 which is arranged coaxially around the sliding surface 34.
- the blade can be integral with the distal part of the sleeve 60.
- This sleeve 60 is also made of a thin sheet.
- the sleeve 60 and the blade 48 are produced in one piece by cutting and folding a flat blank of a sheet material, for example sheet steel.
- the sleeve 60 is axially split at 62 on the side opposite to the blade 48 to allow its mounting on the base body.
- the sleeve 60 has parts cut into a U (FIG. 2) and folded radially inwards by forming support legs 64.
- the spiral spring 42 is disposed in the housing 40 and is applied on the proximal side against the shoulder 44. On the distal side, the spiral spring 42 is applied against the support tabs 64 of the sleeve 60. This spring 42 urges the sleeve 60 and, consequently, the blade 48 towards their active locking position. In the active position, the spiral spring 42 has a non-contiguous part in order to allow the compression of the spring.
- the sleeve 60 is surrounded by a sheath 66, for example made of plastic, forming a grip handle.
- FIGs 3 and 4 there is shown the extension 2 with the locking device 8 in the unlocked position. It can be seen that the sleeve 60, the blade 48 and the sheath 66 are axially displaced towards the proximal end of the base body 6 relative to the position of Figures 1 and 2.
- the spiral spring 42 is compressed.
- the locking point 54 is applied against the surface of the female profile 12. Consequently, the blade 48 flexes radially inwards, therefore towards the axis XX, so that the locking point 54 is retracted with respect to the outer surface of the drive end piece 24. Consequently, the bush 4 can be separated from the drive end piece 24.
- the blocking device 8 is mounted in the following manner.
- the spiral spring 42 is plugged into the distal end 22 of the base body 6 and is screwed onto it until the spring 42 comes to be housed in the spring housing 40.
- the slot 62 of the sleeve 60 is sufficiently wide so that the latter can be mounted on the base body 6.
- the blade 48 is threaded into the groove 30, so that the spring 42 comes to be between the sleeve 60 and the blade 48.
- the sheath 66 is threaded on the sleeve 60 and keeps the latter radially tight, coaxial with the base body 6.
- the extension according to the invention operates as follows.
- the socket 4 is approached by its square female profile 12 at the coupling and drive end piece 24, and it is plugged onto this end piece.
- this surface pushes the blade 48 (and therefore the sleeve 60) towards the proximal end 18 of the body 6, against the 'force of the spring 42.
- the cooperating surfaces 52 and 32 respectively of the loop 50 of the blade 48 and of the groove 30 are no longer in contact, the axial displacement of the chamfered front surface 29 of the sleeve 4 towards the proximal end of the base body 6 causes a radial movement from the free end of the blade 48 towards the axis XX.
- the locking point 54 is pushed radially and is completely retracted inside the groove 30, against the force of the elastic part 58.
- the surface of the female profile 12 of the socket 4 can then pass the locking point 54.
- the sleeve 60 and the blade 48 are pushed towards the distal end 22 of base body 6 under the force of the spring 42, and the locking point 54 of the blade 48 comes out radially outward to project from the groove 30 under the biasing effect of the elastic part 58 of the blade 48.
- the lower surface 52 of the loop 50 is applied against the ramp 32 of the groove 30 and pushes the locking point 54 projecting radially from the surface of the end piece 24.
- the point 54 engages in the recess 14 of the bush 4.
- the radial return force of the elastic part 58 increases this effect.
- the sleeve 4 is self-locking on the end piece 24.
- the blade 48 retracts and releases the locking point 54 from the recess 14 of the socket 4. In the vertical position, when the socket 4 is turned towards the low, the latter separates from the end piece 24 under its own weight.
- extension according to the invention allows reliable blocking of the socket.
- the blocking device is not very sensitive to dirt and does not require close manufacturing tolerances.
- Figures 5 and 6 show a second embodiment of an extension according to the invention.
- This extension 2 is of a particularly simple construction. It consists only of two main parts, namely the base body 6 and a single piece or integral 70 forming an axial spring 42, locking element 48 and operating member.
- the proximal part 18 of the base body 6 has a first diameter and comprises the female profile 20 for connecting the extension 2 to a key.
- the middle part of the base body is cylindrical and has a diameter less than that of the proximal part 18. These two parts are separated by a shoulder 44 or a stop forming a stop. The middle part is devoid of any narrowing.
- the groove 30 formed in the base body 6 is, on the proximal side, shortened with respect to the groove in the base body of the first embodiment.
- the integral part 70 is made in one piece from a spring steel wire. It has a proximal part forming a spiral spring 42. The proximal end of this part is applied against the shoulder 44. The distal end of the spring 42, the turns of which are not contiguous, is extended axially by a part in the form of rod 48 forming a locking element.
- the rod 48 connected by an oblique connection part 49 to the spring 42, extends inside the groove.
- the distal end of the rod 48 is curved and forms the locking point 54 which extends radially outwards.
- the end surface of the steel wire forms the inclined lower surface 52 cooperating with the ramp 32 of the body 6.
- the inclined surface 52 and the ramp 32 have the same form of flat support.
- the rod 48 is biased towards the distal side by the spring part 42.
- the two parts 6 and 70 are made of stainless steel. As a result, they are not attacked by aggressive agents.
- the base body 6 and the integral part 70 are manufactured separately. Then the integral part 70 is plugged into the base body 6 by the distal side until the spring 42 comes to bear against the stop 44. -We compresses the spring 42 axially against the stop 44, and the rod 48 is pressed radially towards the inside of the groove 30. Next, the part 72 of the groove 30 located at the proximal part of the end piece is closed above of the rod by crimping. Then the spring 42 and the rod 48 are released.
- the crimping is replaced by an additional part such as a circular ring or rod, mounted for example in a groove formed on the base body 6. This part extends above the rod in order to avoid separation of the base body 6 and the part 70.
- extension 2 according to this second embodiment is easy to manufacture and very quick to assemble. As a result, it has a low cost.
- the second embodiment of the extension works in a similar manner to that of the first embodiment with the difference that for unlocking the device, one grasps and moves the distal part of the spring 42 towards the stop 44 by compressing the non-contiguous turns.
- the locking element 48 extends axially at a distance from the bottom of the groove 30 over substantially its entire length, large tolerances can be used during manufacture.
- Figures 7A and 7B show two variants of the second embodiment of the extension.
- the bottom surface of the groove 30 forms at its distal end a ramp 32 in the form of a concave arc of a circle.
- the radius of the concavity of the ramp 32 is identical to the radius of the tool for manufacturing the groove, for example the cutter. Consequently, the ramp 32 is easy to manufacture.
- the end surface 52 of the rod 48 is of complementary shape to the ramp 32, that is to say of convex rounded shape.
- the embodiment of Figure 7B includes a ramp surface 32 of convex shape while the end surface 52 is planar. The two surfaces therefore have different forms of support.
- the choice of the shapes of the surfaces of the end 52 and of the ramp 32 is made so that the force resulting from the supports of the surfaces 32, 52 is directed radially outward relative to the axis XX.
- the invention also applies to drive end pieces having a profile other than square.
- the part 70 can be produced in one piece from plastic.
- the part 70 can be produced by overmolding a spring part made of material elastomer on a blocking part made of rigid plastic or metal, for example steel.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002218362A AU2002218362A1 (en) | 2000-11-22 | 2001-11-13 | Device for coupling a member and corresponding coupling tool |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0015087A FR2816862B1 (fr) | 2000-11-22 | 2000-11-22 | Dispositif d'accouplement d'un organe et outil d'accouplement correspondant |
FR0015087 | 2000-11-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2002042037A2 true WO2002042037A2 (fr) | 2002-05-30 |
WO2002042037A3 WO2002042037A3 (fr) | 2002-09-26 |
WO2002042037B1 WO2002042037B1 (fr) | 2003-01-03 |
Family
ID=8856765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/003552 WO2002042037A2 (fr) | 2000-11-22 | 2001-11-13 | Dispositif d'accouplement d'un organe et outil d'accouplement correspondant |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2002218362A1 (fr) |
FR (1) | FR2816862B1 (fr) |
WO (1) | WO2002042037A2 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1660989A (en) * | 1927-01-27 | 1928-02-28 | Carpenter Eugene Roy | Wrench |
US4508005A (en) * | 1983-12-19 | 1985-04-02 | Snap-On Tools Corporation | Quick release mechanism for ratchet wrench |
DE3804129A1 (de) * | 1987-02-20 | 1988-09-01 | Beisch Hanspeter | Verbesserte steckschluesselverlaengerung |
AU595723B2 (en) * | 1983-12-13 | 1990-04-05 | John Brent Moetteli | Socket set for ratchet wrench |
US5873289A (en) * | 1995-03-06 | 1999-02-23 | Jarvis; Jack D. | Releasable locking connector for tool |
US6267031B1 (en) * | 2000-01-18 | 2001-07-31 | Yen-Shuang Cheng | Tool for engaging sockets |
-
2000
- 2000-11-22 FR FR0015087A patent/FR2816862B1/fr not_active Expired - Fee Related
-
2001
- 2001-11-13 WO PCT/FR2001/003552 patent/WO2002042037A2/fr not_active Application Discontinuation
- 2001-11-13 AU AU2002218362A patent/AU2002218362A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1660989A (en) * | 1927-01-27 | 1928-02-28 | Carpenter Eugene Roy | Wrench |
AU595723B2 (en) * | 1983-12-13 | 1990-04-05 | John Brent Moetteli | Socket set for ratchet wrench |
US4508005A (en) * | 1983-12-19 | 1985-04-02 | Snap-On Tools Corporation | Quick release mechanism for ratchet wrench |
DE3804129A1 (de) * | 1987-02-20 | 1988-09-01 | Beisch Hanspeter | Verbesserte steckschluesselverlaengerung |
US5873289A (en) * | 1995-03-06 | 1999-02-23 | Jarvis; Jack D. | Releasable locking connector for tool |
US6267031B1 (en) * | 2000-01-18 | 2001-07-31 | Yen-Shuang Cheng | Tool for engaging sockets |
Also Published As
Publication number | Publication date |
---|---|
FR2816862B1 (fr) | 2003-03-28 |
WO2002042037A3 (fr) | 2002-09-26 |
FR2816862A1 (fr) | 2002-05-24 |
AU2002218362A1 (en) | 2002-06-03 |
WO2002042037B1 (fr) | 2003-01-03 |
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