FR2495685A1 - IMPROVEMENTS IN PIC RETENTION DEVICES, IN PARTICULAR PICKUP PICKS - Google Patents

Abstract

THE INVENTION RELATES TO A DEVICE FOR HOLDING A ROD TOOL IN A SUPPORT FRAME. THE FRAME HAS A BUSH 3 TO RECEIVE THE ROD 2 OF THE TOOL 1 SO AS TO SUPPORT THE TOOL DURING USE AND IS CHARACTERIZED IN THAT IT IS EQUIPPED WITH A CAM OR AN ECCENTRIC 5 MOUNTED IN A MANNER ROTATING SO THAT PART OF ITS SURFACE APPLIES AGAINST A RECESS 6 IN THE SHAFT OF THE TOOL SO AS TO RETAIN IT IN THE SOCKET. APPLICATION TO RETAINING DEVICES FOR PICS OF HAVEUSES.

Description

The invention relates to a device for retaining

  a rod tool in a socket mount and more particularly, but not exclusively, a device

  used to hold a woodpecker's spike in a wood

  peak tier. According to the invention, the combination of a rod tool and a mount having a socket is proposed

  to receive the rod of the tool so as to support

  the tool during use, the mount being

  equipped with a cam or eccentric that can be made

  turn so that part of its surface is

  plique the rod of the tool to hold the rod in

the socket.

  The part of the surface of the cam or eccentric

  that applies to the tool shank is preferably

  curve. The provision may be such that the rotation

  The cam or eccentric causes a portion of the cam to move into the socket. The axis of rotation of the cam or eccentric may be substantially normal to the axis of the socket or it may be at an acute angle to the normal axis of the socket. When the socket is rectangular, the axis of rotation of the cam or eccentric can make an acute angle with the side of the socket by which

  the cam or eccentric is designed to protrude.

  The cam or eccentric may include parts

  Threaded threads adapting to parts of the frame

  which are threaded correspondingly, preferably

  one on each side of the socket.

  Preferably, means are provided to limit

  the rotation of the cam or the eccentric in the

  ture. The means may comprise a pin protruding in a generally normal direction by

  cam or eccentric and

with the stops of the mount.

  Preferably, means are provided to avoid or reduce the risk of unintentional loosening.

  cam or eccentric during use.

  When the cam or eccentric is screwed into the mount, frictional inserts may be provided between the complementary threads for

  achieve this goal. or where the means

  to limit the rotation of the cam or

  are formed of a protruding spindle

  In this connection, the spindle may be adapted to be applied to a planar cam that biases the spindle to rotate the cam or eccentric and apply it to the tool shank. The flat cam

  can include two inclined parts in the opposite direction

  se, so that, depending on whether the pin is applied to one or the other part, the cam or the eccentric

  is pushed to the active or inactive position.

  In another aspect, the invention proposes a

  intended for use in the combination described above.

  above, the frame having a socket for receiving

  see the rod of a tool and support the tool while

  use, and tool retainers

  taking a cam or eccentric rotatable so that part of its surface is applied to the stem

of the tool.

  In yet another aspect, the invention is

  throw a tool intended for use in the combination

  above, with a stem designed to accommodate

  in a socket of a mount and equipped with an

  whose wall is designed to undergo the action of a cam or eccentric of the mount so

  to fix -the tool in the socket. The recess of the

  tool ge is preferably a throat generally

  directed normally to the axis of the stem. Where the

  When the eccentric is inclined, the recess is preferably inclined correspondingly and at an acute angle with the normal to the axis of the tool shank. In another aspect, the combination of a shank tool and a frame having a sleeve is proposed.

  to receive the tool stem in order to

  carry the tool during use, the mount being

  provided with a cam or an eccentric disposed within the

  the socket and that can be rotated

  so that part of its surface is applied to a

  of the tool that is in the socket for retaining

put the rod in the socket.

  The cam or the eccentric can extend, in

  towards the socket from one side to the other or else it

  (he) can only advance on a part of the

  the socket. The rod of the tool is preferably

  with a notch or recess extending

  completely through the stem or part of the

  ge, as required by the extent to which the cam or eccentric moves in the notch or 1 '

  of course to allow the insertion of the

  the tool in the socket before rotating the cam or eccentric to apply it to the stem

  of the tool and hold it. The stem preferably has

  a stop surface for application

  cam or eccentric and which is preferably

  this inclined relative to the axis of the rod of the tool.

  The notch or recess in the tool shank is preferably terminated by another abutment face which may, if desired, be normal to the axis of the tool shank and which is designed to under the action of the cam or eccentric when it is rotated in the desired direction to release the tool so that it tends to disengage the tool from the position

  completely inserted in the socket.

  In another aspect, the invention proposes a

  ture for use in the combination above and having a socket for receiving the rod 1 '

  tool to support the tool during use.

  and a tool retaining means comprising a cam or eccentric disposed in the socket and rotatable so that a portion of its surface is applied to the tool shank to retain it in the socket. . The cam or eccentric can extend through the bushing from one side to the other or it can move only over part of the width

of the socket.

  In yet another aspect, the invention relates to a tool for use in the combination described above, the tool having a rod adapted to be housed in a socket of a frame and provided with

  a recess or notch from its end.

  free direction, in the axial direction of the sleeve and having at its inner end an inclined abutment surface intended to undergo the action of the cam or

  of the eccentric. Preferably, the notch or recess

  ends with another abutment face that can

  be arranged normally at the axis of the stem of the

  til and which is designed to undergo the action of the cam or the eccentric when it is turned in the desired direction to release the tool so that it

  tends to lift the tool relative to its

  completely inserted in the socket. The recess or 1 '

  notch is preferably disposed substantially at the center

  be the width of the tool shank. When,

  as usual, the tool shank has a recess section

  the recess or notch preferably starts from the main face (s) of the tool, the invention is schematically illustrated by way of example in the accompanying drawings in FIG.

  FIG. 1 is a sectional side view of a first

  first embodiment of the invention,

  FIG. 2 is a front view of the eccentric used

  In the embodiment of FIG. 1, FIG. 3 is a section along the line AA of FIG. 2, FIG. 4 is a side view of the eccentric of FIG. 2, FIG. mounting shown in the embodiment of Figure 1, Figure 6 an axial view of a frame similar to that of Figure 5 but showing a second embodiment of the invention,

  FIG. 7 is a side view of a tool shaft of

  intended to be used in the embodiment of FIG.

  FIG. 8 is an axial view of the tool shaft represented

  7, a plane of a frame similar to that of FIGS. 5 and 6, but showing a third embodiment,

  FIG. 10 is a side view of a similar frame

  1, but showing a fourth embodiment, FIG. 11 is an axial view partially in section of the frame of FIG. 10, FIG. 12 a view similar to FIG. 2 but showing a modified form of eccentric. ,

  FIG. 13 is a side view of a mount

  both means of rotation of the cam or the excen-

  FIG. 14 is an axial view of the frame of FIG. 13, FIG. 15 is a plan of the frame of FIGS. 13 and 14,

  FIG. 16 is a sectional side view of a mount

  re showing another embodiment, Figure 17 a partially sectional plan of the mount of Figure 16, Figure 18 a side view of the mount of Figures 16 and 17, Figures 19 to 22 show details of the -

  yen of tool restraint of the execution mode of

gures 16 to 18,

  Figures 23 and 24 show details of the

  positive to operate the tool retaining means of the embodiment of Figures 16 to 18, Figure 25 is a side view of another mode

  mount performance, usually similar to this-

  FIGS. 16 to 18, FIG. 26 an axial view of the mount of FIG. 25, FIG. 27 a sectional side elevation of a peak of shearer partially inserted into a peak box, FIG. 28 a view corresponding to FIG. Figure 27

  but showing the peak completely inserted into the wood

tier of peak and fixed in place,

  FIG. 29 a plan of a locking device

  the cam or eccentric stage, FIG. 30 an axial elevation of the locking device of FIG.

  Figure 31 a side view of the spindle

  shown in Figures 27 and 28, Figure 32 a side view of the peak housing and Figure 33 an axial view of the peak housing of the

figure 32.

  In the drawings, more particularly on the

  1 to 5, a peak of shearer 1 is shown

  carrying a rod 2 retained in a socket 3 of a mount or peak box 4. The peak rod is retained in the flange by means of an eccentric mechanism 5 mounted in a bore 35 of the frame and which projects into the sleeve 3 so as to engage in a recess 6 of the rod 2 of the peak. As can be seen in FIGS. 2 to 4, the eccentric mechanism 5 is generally cylindrical in shape and comprises two final parts.

  7 placed on either side of a cy-

  central lobe 8 which is the part that makes

  binds or protrudes into the socket to apply on

  the stem of the peak, the mechanism ending at each ex-

  tremity by a square section to which we can ap-

  use an appropriate key or other tool to

  re turn the mechanism. It can be seen from FIG. 3 that the central cylindrical section 8 is offset axially

  relative to the threaded section 7. The mechanism

  The frame is arranged in the frame 4 so that the threaded portions 7 adapt to parts

  internally in the threaded bore correspondingly

  and disposed on either side of the sleeve 3 so that the rotation of the mechanism has the effect that

  the central portion 8 advances in the sleeve 3.

  The arrangement represented by FIGS. 6 to 9

  is generally similar to that described above.

  except that, as shown in Figure 6,

  the axis of the bore 35 of the frame, intended to receive

  see the eccentric mechanism 5, is inclined relative-

  perpendicularly to the axis of the bushing 3 and as shown in Figure 9, the axis of the bore is arranged to make a small angle with the side of the rectangular sleeve 3 by which the mechanism advances in the socket. Figures 6 and 7 show

  how the recess 6 of the rod 2 of the tool is in-

correspondingly slanted.

  The inclination or deflection applied to the bore for receiving the eccentric mechanism is intended to enhance the locking effect given

  the axial force thus imposed on the eccentric mechanism

  the thread 7 pushes into firmer contact with the corresponding threaded portions 10 of 1 '

  bore 35 so as to avoid accidental loosening

such of the device in use.

  In the arrangements described above, the mechanism

  Eccentric nism is screwed into the mount to a position o its central portion 8 coincides with the sleeve 3 of the mount. The rod of the peak is inserted into the mount when the part 8 of the eccentric is in its rearward position, that is to say when it is not

  does not protrude into the socket. When we then

  you turn the mechanism 5 about 12.00, the part

  8 comes into contact with the lower edge of the recess

  6 of the spike rod and exerts on it a

  force that tends to push it further into the socket.

  The penetration of the rod into the socket is of course limited by conventional stops provided on

peak.

  FIGS. 10 and 11 show a mode of execution

  generally similar to those described above.

  above, except that the threaded parts of the

  eccentric are replaced by smooth disks

  11 which can turn in recesses 12 on the sides

  4. Parts 8, 9 and 11 which constitute the

  together kill the eccentric mechanism are fixed together so that they rotate together and as in the previous embodiment, the axis of the central portion 8 is offset relative to the axis

disks 11.

  As shown in FIG. 12, the threaded portion 7 of the eccentric mechanism 5 of FIG. 2 can be provided with hard elastic inserts 13 by

  example of neoprene opposing a non-rotational rotation

read from the mechanism in use.

  Figures 13 to 15 show a disposition of the gen-

  generally described above, comprising

  yens of limitation of the possible rotation angle of the eccentric mechanism. This is achieved by replacing the planar portions 9 of the eccentric mechanism 5 of the

  gure 2 by terminal parts generally in form

  corner to which one can apply, in a single

  the position, a key 15 having an opening of the desired shape for receiving an end portion so as to rotate the eccentric mechanism. The rotation of the eccentric mechanism is limited by pins 16 which are housed with friction in bores of the frame 4, protrude from the sides of the frame and are designed to be applied against

  the key after rotation at an angle of 1200. If any-

  Once it becomes necessary to remove the ex-

  centric, just hit the pins 16 to bring them flush with the surface of the frame and

  we can then rotate the key freely.

  The arrangement represented by FIGS.

  22 is generally similar to those described in

  above, except that the eccentric mechanism

  that includes a D-section spindle, 17, mounted

  eccentrically in a corresponding shaped cavity

  portion of the spindle 17 which corresponds to the central portion 8 of the eccentric mechanism of Figure 2. The sheath of a cylindrical sheath 18 which is indented at 21 (see Figure 21).

  18 is mounted in a cylindrical bore 35 of the

  ture that cuts the socket 3. Near each end

  pin 17 carries spring pins 19 available

  in cavities 22 and protruding from the bro-

  17 to prevent the axial movement of the mechanism

  eccentric in use and also to limit the

  rotation of the eccentric mechanism. In this

  Indeed, the pins 19 are arranged in recesses

  20 of the frame 4 and the rotation of the eccentric mechanism is limited by the stop of the pins 19 against the ends of the cavity, as can be seen especially in Figure 18. Figures 23 and 24 show a key 15 that we can apply to

  the end of the D-pin 17 of the eccentric mechanism

  Figure 16 to 22 to rotate the mechanism. Figures 25 and 26 show a variant of the

  mount of the arrangement of Figures 16 to 22 in the-

  the face of the recesses 20 o are arranged the pins 19 is inclined so that the rotation of the mechanism causes the pins to be applied to the

  faces to resist following the movement. Befor-

  (as has been shown), the faces

  two inclined parts in opposite directions 23

  play the role of flat cams so that the mechanism

  nism is biased either to its active position or to its inactive position, the arrangement being such that in the active position, that is to say when the eccentric or the cam is applied on the spike rod,

  the pins are applied to the faces of the

  in order to solicit more firmly the

  Eccentric canism towards the position of cooperation.

  Preferably, in the inactive position, the goupil-

  are out of contact with the inclined parts of the recesses as schematically shows the

figure 26.

  Figures 27 to 33 show the combination of a

  peak of shear with stem 1, of a box of peak 4 pre-

  sensing a socket 3 adapted to receive the rod 2 of the peak 1 and a locking device in the form of a cam or an eccentric 5 mounted in the peak housing and rotatable to engage

  in a recess 6 in the shaft of the tool for retaining

  nite the tool in the peak box. Generally this arrangement is that described above but in this case, the cam or the eccentric 5 is mounted (e) so as to be arranged inside

  of bushing 3 and extend across the bushing

  from one side to the other, its axis of rotation being

  placed in the center of the section of the socket and towards the bottom of the socket. Thus, to enable the rod of the tool to be inserted into the socket, its lower part is forked, the two branches 30, 31 being separated by a central notch 32 extending from the end

  free in the axial direction of rod 2 and

  at its upper end by a stretching

  Fig. 33 has an inclined abutment surface 34 adapted to undergo the action of the cam or eccentric portion 8 to retain the shear peak in the spike housing. The enlargement 33 is limited at its upper end by a surface 35 directed normally to the axis of the shaft of the tool and designed to undergo the action of the cam or the eccentric when it turns in the direction wanted to tend to lift the peak of its position completely inserted into the socket. For this purpose, the cam or the eccentric

  is placed so that when he / she is po-

  as shown in Figure 27 to enable

  be the insertion of the rod of the tool, he (she) s'

  applies against the inner end 35 of the

  in order to prevent the heel 36 of the peak from being applied against the upper surface of the peak box. The peak is attracted to the fully inserted position shown in FIG.

  cam or eccentric in the opposite direction of the

  guilles of a watch, so that it is applied against the inclined stop 34 of the rod of the tool. It is

  obvious that if we turn the cam or the excen-

  in the opposite direction, that is to say in the sense of the

  the hands of a watch, it applies against the over-

  upper face 35 of the slot to push the peak to move away from its seat in the peak housing. An advantage of this embodiment is that the peak is fixed in the peak box practically on its

axis and not by one side.

  Another advantage of this embodiment is that the peak is reversible in the housing so as to face the opposite cutting direction, since the locking mechanism is centered and that the cam or the eccentric can be actuated in the both directions

of rotation.

  Figures 34- and 35 show another example of

  means to resist any tendency of the

  Eccentric canism to relax in service. In this embodiment, the rod 2 of the peak 1 is provided with a hard neoprene insert 24 which protrudes from the recess 6 but does not extend beyond the side of the spike rod. The eccentric D, 17, has a flat surface 25 on its surface so that when the eccentric is rotated to its active position (see figure), the hard insert 24 is applied against the flat 25 and is deformed to such an extent that

  tends to resist the opposite rotation of the eccentric

  than. The active surface of the insert can

  have a metal element resistant to wear.

Claims (18)

  1 - Combination of a rod tool and a mount   having a socket for receiving the stem of the   to support the tool during use.   characterized in that the mount is provided with a cam or eccentric rotatably mounted so that a part of its surface is applied   against the rod of the tool so as to retain the in the socket. -   2 - Combination according to claim 1, characterized   in that the frame is provided with a cam or eccentric disposed completely inside the bushing and rotatably mounted so that a part of its surface is applied against a rod of tool placed in the socket to hold it in the socket.   3 - Combination according to claim 2, characterized   in that the cam or eccentric extends into   through the socket from one side to the other.   4 - Combination according to claim 2, characterized   laughter in that the cam or the eccentric protrudes   only partially through the socket.   Combination according to claim 3, characterized   in that the rod of the tool has a   che or a recess passing through it completely.   6 - Combination according to one of claims 1   to 5, characterized in that the rod has an over-   stop face intended to undergo the action of the cam or   eccentric said abutment surface being inclined   born relative to the axis of the tool shank.   7 - Combination according to claim 6, characterized   in that the notch or recess of the tool shank terminates in a further abutment surface arranged to be actuated by the cam or eccentric when rotated in the meaning intended to release the tool, so that it tends   to lift the tool relative to its complete position inserted into the socket.   8 - Combination according to claim 1, characterized   in that the arrangement is such that the rotation of the cam or eccentric   of it (this one) to protrude into the socket.   9 - Combination according to claims 1 to 8,   characterized in that the part of the surface of the   cam or the eccentric that applies against the ge of the tool is curved.   - Combination according to claims 1 to 9,   characterized in that the axis of rotation of the cam or eccentric is substantially normal to the axis of the socket.   II - Combination according to claims 1 to 9,   characterized in that the axis of rotation of the cam or   the eccentric makes an acute angle to the dicular to the axis of the socket.   12 - Combination according to claims 8 and 11,   characterized in that the socket is rectangular   and that the axis of rotation of the cam or eccentric   that makes an acute angle with the side of the socket by which the cam or eccentric is designed to make protruding into said socket.   13 - Combination according to claims 1 to 12,   characterized in that the cam or eccentric com-   takes threaded parts fitting parts   mount, threaded correspondingly you.   14 - Combination according to claim 13, characterized   characterized in that the mount has portions   threaded on opposite sides of the socket.   - Combination according to claims 1 to 14,   characterized in that it comprises means   limitation of the rotation of the cam or in the mount.   16 - Combination according to claim 15, characterized   characterized in that the means for limiting rotation   cam or eccentric   spindle projecting in a general direction   normal from the cam or eccentric and can cooperate with stops on Frame.   17 - Combination according to claims 1 to 16,   characterized in that it comprises means permitting   avoiding or reducing the risk of releasing   unintentional loss of cam or eccentricity only during use.   18 - Combination according to claim 17, characterized   characterized in that the cam or eccentric is screwed into the frame and that friction elements   are fitted between the completed threads   to prevent unintentional loosening.   19 - Combination according to claim 16, characterized   in that the spindle is designed to   on a flat cam that is pulling the spindle   to turn the cam or the eccentric towards the   cooperation position with the tool shank.   Combination according to claim 19, characterized   characterized in that the flat cam comprises two parts   inclined in opposite directions, so that, depending on the   one or the other part undergoes the action of the spindle, the cam or the eccentric is urged to turn to bring it to either the active position or the inactive position. 21 - Frame intended to be used in combination   according to one of claims 1 to 20, characterized   in that it has a socket for receiving the   rod of the tool so as to support the tool   the use and tool retaining means comprising a cam or eccentric rotatably mounted so as to allow a portion of its surface to be pressed against the shank of the tool. 22 Frame intended for use in combination   according to one of claims 2 to 7, characterized   it has a socket for receiving the rod of the tool so as to support the tool during 1 '   use and tool retaining means   a cam or eccentric arranged inside   of the bushing and rotatably mounted on   to allow a part of its surface to come against the rod of the tool to hold it in the socket.   23 - Mount according to claim 22, characterized   in that the cam or eccentric extends to   through the bushing from one side to the other of the latter.   24 - Tool for use in combination   according to one of claims 1 to 20, characterized   in that it has a rod designed to be housed   in a socket of a mount and that the stem   a recess whose wall is arranged to   bir the action of an intended cam or eccentric   in the mount to fix the tool in the socket.   the. 25 - Tool for use in combination   according to one of claims 2 to 7, characterized   in that it comprises a rod arranged to be received in a socket of a frame and that the stem has a recess or a notch starting from its   free end in the axial direction of the   and having at its inner end an   inclined stop face intended to undergo the action of the cam or the eccentric.   26 - Tool according to claim 25, characterized in that the notch or the recess ends with a   other abutment face arranged so as to undergo   The cam or eccentric is rotated in the desired direction to release the tool so that it tends to lift the tool relative to its fully inserted position in the socket. Tool according to claim 26, characterized   in that the notch or recess is practically   only at the center of the width of the tool shank.   28 - Tool according to claim 27, characterized in that the rod has a rectangular section and that   the notch or recess starts from the main face (s) the tips of the tool shank.