DE1893777U - FEED DEVICE WITH A LATCH DRIVE, IN PARTICULAR ADD-ON DEVICE ON A GRINDING MACHINE. - Google Patents

Description

"Feed device with a ratchet drive, in particular— right auxiliary device on a grinding machine "

The invention relates to a feed device with a pawl drive, the pawl z, B “by an electromagnetic! Drive can be advanced against a spring force, in particular! Additional device for the tool holder of a grinding machine.

In particular - at. = - sand grinders that use one of the grinding wheels have independent grinding wheel provision, is often required to increase the service life of the tool changes that the feed pressure of the machining work or grinding « work is adjusted. This requires a uniform provision corresponding to the given circumstances, for which e.g. Ratchet drives with several pawls for switching and locking are known, To keep the feed paths of the ratchet wheel constant ζ «B, weight arms are known * For all versions the pawls are pressed into the gaps between the teeth of the ratchet wheel by spring pressure or a weight, whereby the pawl tip is always advanced to the bottom of the tooth gap,

what jedodh nichtJ me pointed premature wear of the ratchets, "but ^one also relatively soon -ungleichmaBi-ges intervention" and thus a different feed of the latches; znr result has ^·: _-;

It is the task of ZTigrunde to remedy the aforementioned deficiency and, in particular, to avoid premature wear of the pawl tips and thus irregular movements of the tool · --- :) ..-: "=

According to the invention, the problem posed is essentially solved by the fact that the tip of the pawl during the advance « movement to the whore. essentially radially extending flanks of the teeth of the ratchet wheel and before entry of the / Lüekzugbewegung from the interlocking handle can be lifted so far that the pawl out of contact with the Ratchet teeth remains »Γ; ":"

Such an arrangement of the pawl and the pawl enant riebe s does not only result in a beautiful intervention, but in the same way

Way also a gentle lifting of the latch out of the Area of the teeth of the ratchet wheel, which means a considerable increase in the service life of the entire ratchet drive.

According to a preferred aspect of the invention The swivel arm carries in its remote direction from the door Side a stop segment, in front of which a turret head by one Axis running parallel to the auxiliary shaft can be rotated and locked is stored, de'r along its circumference several having different lengths of radial stop screws, each of which one with the stop segment in the sense of a corresponding limitation of the swiveling back angle of the swivel arm and thus in the sense of defining the working stroke the bumper cooperates.

Other embodiments of the invention relate to others structural details of the gate push device according to the invention.

In the drawing, the invention is illustrated by way of example; show it:

IPig. 1 the Torsehubantrieb in a held schematically Side view (parts of a ratchet wheel are cut away for better visibility of details shown);

Mg. 2 -den. Drive, according to Mg ... 1 _: in. One axially to -

a ratchet wheel, guided wire cut according to the Line H-II of the Mg. Ij _. "- ■"

Mg. 3 the same drive in one. Partial cut after the line ΙΙΙ-ΙΪΙ the Mg, 1?

Mg. 4.in. larger-em-MasstaTo. that section of the

Jig. 1 showing the ratchet drive *

The feed drive shown is on the machine stand 1 of an otherwise not shown customer machine arranged and stored essentially on a bearing block 2 which is flanged to the machine frame 1, for example in the manner shown.

In the bore of the bearing bracket 2 is a collar sleeve firmly pressed in, in which an auxiliary shaft 4 of the Yorsehub drive is rotatably mounted. According to Mg. ■ a cup spring 5 non-rotatably applied collar sleeve β on the one ratchet hub _7 rotatable, but axially and slidable is stored. "The ratchet hub 7 carries a ratchet wheel 8,

From Mg. 2 it can be seen that the ratchet wheel hub with the ratchet wheel 8 and with a graduated drum 9 Screws 10 is firmly connected. In the scale drum 9 is a screw U rotatably mounted on a circumferential point, the worm wheel mounted axially to the auxiliary shaft 4 11a is in engagement. The Schneekenrad 11a is on the

Sehnecicenradnabe 12, which ^: its; already wedged on / the auxiliary shaft by means of a feather key 13, rotatably mounted / and secured by: lateral segments 14 against axial displacement. A bushing 15 is drawn into a transverse bore of the worm gear hub 12, through which a Bandelsehrau.be 16 passes _: the Q-ewinde in. an adapted threaded bore of a clamping segment 14 'engages, whereby the worm wheel 11a can be firmly clamped to the worm wheel hub 12 via the knurled screw 16. The bushing 15 still protrudes on the other side of the clamping segment 14' the worm wheel hub. 12 and passes through there, a handwheel 17 firmly connected to the auxiliary shaft 4, which is used for manual adjustment of the Yorsehub,

On an extension facing the ratchet wheel .8 the collar 3; is about, a needle bearing- a swivel arm stored, but only against the effect of an.im Bearing block 2 arranged and engaging on its upper circular peripheral part braking device 19 is rotatable. In the area of the outer end of the pivot arm 18 is shown in this one, with its shaft parallel to the auxiliary shaft 4 running crank, bearing, which parts from their bearing, a shaft 20 on the side facing the ratchet wheel 8 from a crank arm 21 and ~~ anv4_ the other side from one extending in a different cadial direction than the crank arm 21 Crank arm 22 consists «on a parallel to shaft 20.:,

outwardly protruding pin 23 of the crank arm "21 is a The pawl 24 is pivotably mounted, which on its outer, radially again shapeless shape against the outer circumference of the ratchet wheel 8 inwardly bent end carries a ratchet tooth 25. At the radially to the pivot arm 18 inwardly located end of the pawl 24 engages a compression spring 26 which is supported on the other hand on the crank arm 21 and which strives to move the pawl 24 according to FIG Pig. 4 to pivot clockwise. One such However, pivoting movement acts on the outer band area of the Pawl 24 attacking stop pin 27 opposite, which in the Eeil there of the crank arm 21 can be screwed and through a lock nut 28 is mounted lockable.

The crank arm 22 carries on the outside of its free end a pin 29 running parallel to the shaft 20, on which a cave 30 is rotatably mounted. You should "" 30 is in the recess 31 of an approximately U-shaped driver head 32 guided, which at the free end of a bumper 33 is fixed. The bumper 33 forms on her the driver head 32 remote end at the same time the movable core of an electromagnet 34, which via a console 35 on the machine stand 1 is set. Furthermore attacks on one Instead of the driver head 32 there is also a tension spring 36 which endeavors, the bumper 33 eats the opening of the magnet

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to pull in. When the magnet 34 is switched on, the bumper 33 is removed from the magnet against the force of the tension spring 36 pushed out and "causes a following switching step of the pawl drive described in more detail, ".

On the side of the crank arm 21 facing the bumper 33 there is also a transversely outwardly projecting stop pin 37 set, with the stop pins located in a plane parallel to the plane of the swivel arm 38 and 39 cooperates, which in turn has a den Ansehlagstift are set adjustable in a G-threaded hole receiving bearing block 40 or 41 on the swivel arm 1-8. A stop segment 42 is also fixed on the side of the swivel arm 1.8 facing the electromagnet 34, the one with its pawl 24 furthest from the ratchet wheel remote end position of the Sehwenkarmes 18 with each a stop screw 43 of a turret head 44 rotatably and adjustably mounted on the machine frame 1 interact can. The radial length of the stop screws 43 is different and adjustable in detail, so that with the help of the turret 44 any quick change of the Back pivot angle of the pivot arm 18 and thus vice versa the stroke length of the bumper 33 is also possible.

The auxiliary shaft 4 is used when the tool slide carrying the grinding wheel (not shown) is supplied

ziir. _; "irbe-ri3ragun-g- ' ^: -d-es - Be ± s ^; tellmomen-tes,. while the workpiece" on a longitudinally movable workpiece slide 45; fixed. "" _._. is clamped, which is respectively energized and at the end of a hat via an electrical Eontakt 4-6 the electromagnet 34 a therethrough; "switching of the ratchet drive-described step, it triggers * In. is each switching step" the bumper 33 ~ .. from the .Magneten .34-gögeK ·. aas. Ratchet wheel 8 advanced against the force of the tension spring 36, whereby over the holle 30 and. the crank arm 22 is exerted on the crank a force directed to the left according to s lig * 4, which see first ... because of the -described braking. of. Sehwenkarmes. 18th in. a rotation of the crank effect about the shaft 20 clockwise until the Jnschlagzapfen 37 sm inschlagstift 58- in the group consisting of:.. "Sig 4 · arising manner anliegt.- This pivotal movement of the crank results in the engagement of the pawl tooth 25 in front of each located tooth gap of the ratchet wheel 8 in the "Pig. 4 -for-going way, whereby the outer _ face of the ratchet tooth 25 can only rest on the radial tooth flank of a tooth of the ratchet wheel -8 without ■ - approximately with; its tip completely in-the round of the tooth gap - urge - to be able to '. The pen ^ - 38 - is t ^ nth e ingest eil t *

. . In the now following further pushing movement of the push rod 33, the. Behwenkarm ^ S against, the / effect of the braking device 19 in ^ rZeUgOrSInTL ¹ Vi-O- long pivoted,

until the bumper 33 has reached its outer end position. The covered viewing angle of the swivel arm 18 is in each case a measure of the size of the switching step carried out.

As soon as the electrical contact 46 is released again when the slide 45 is switched over, the electromagnet 34 is also switched off again, whereupon the push rod 33 is now withdrawn to the left by the force of the tension spring 36 as shown in FIG. As a result of the braking of the swivel arm 18, the crank is initially swiveled counterclockwise by the distance X that was previously set between the stop pin 37 and that according to Pig. 4 upper stop pin 39 was present. This adjustable pivoting path of the crank corresponds to the lifting of the ratchet tooth from the toothing of the ratchet wheel 8. When the push rod 33 is subsequently withdrawn, the entire pivot arm 18 is pivoted again counterclockwise against the force of the braking device 19 until the stop segment 42 on the one facing it Stop screw 43 of Hevolverkop'fes 44 strikes. This Sehwenkausschlag of the swivel arm 18 is the same as the swivel path executed in the next switching step in ArbeitsrichfuTag ^ dsr latch 24 *, which is why the size of each Sehaltsehrittes by a corresponding input

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Position of the turret it 44, "for example from a in Pig. 3 schematize]! indicated handwheel 47 ago, predetermined can be.

The invention is not bound to all details of the "exemplary embodiment described. Thus" in particular the structural design of the crank is only one embodiment of the pawl control, which in principle can be achieved in the same way by other constructive means. There are other variations as well and configurations of the exemplary embodiment are conceivable without that thereby the laid down in the claims below The scope of the invention is left.

Protection claims

Claims (7)

S ο η Ό. t ζ an s ρ r ü e Ί) YorschufeVorriehttins with a Klinfeentriebj its in a ratchet wheel engaging Elinke ziam example through. ' a; electromagnetic drive '"of opposing forces Spring yersctLiebbar ^ is, in particular Beistell- 'ι device for the tool carrier of a grinding machine, da u r c h ge k e η η ζ e i η et, that the tip of the pawl during the advance movement only on the essentially radial! ken of the teeth of the ratchet wheel and: before a « occurs, the withdrawal movement from the engagement so far can be lifted out that the pawl during the retraction movement except ^ contact with the ratchet teeth remains « 2) Yorschubyor'riehtung according to claim 1, characterized in that g _: ek e: xi, μ . z \ ei ^ ch η et that the pawl ^ 24) at the free end of a swivel arm (Ί8) that is freely pivotable on the ratchet wheel shaft (at? * Stellwelle 4) against a friction resistance to a ; Ratchet axle; parallel: axis pivotable, supported: and: from the electromagnetic drive (electromagnet; (34-) initially opposite the .swivel arm (18) from the! release position ' _that releases the ratchet wheel (8): _.- up to a; handle position against the ratchet wheel (8) is pivotable, in which it can only rest on a radial tooth flank of a tooth of the ratchet wheel (8) whose tooth base is free, and that the electromagnetic drive on the Ki-inkensehwenkachse (lelle; 20) at the same time in the -Silane "■": ^"," an account of the Eeibungs- resistance only to the ^^ linirkenschwenkung ansehliessendenY or relapsing swing;; to "des'Schwenkarmes (18) attacks -" - ■ ": -: -". "'.. - '' ■. "-..-. '"';. ■ "" .-- - '■ .- 5) feed device according to claims 1 and 2, d a d u r c hg eke η η ζ e i eh η e t that the blade (24) on one with its ■ "shaft (20) on the Swivel arm (18) radially inward of the elbow tooth (25) mounted crank arm (21) of a crank attached * » is arranged on the one on a radial to the swivel arm (18) outside the Klmkensehwenkaehse (shaft 20) location: a bumper (55) of the electromagnetic drive engages. 4) Ύ orschubvorriehtung according to claims 1 - »5, ■" -: because you, re hgekeh η ze I ch η e p .-, - ■ - that the crank runs parallel to the. Crank arm (21) The second crank arm (22) has at its free end a driver head (52) fixed in a recess (3I) of a "■;.-" -.- "'on the free end of the bumper (35) engaging Bolle (50) stored 5) Irorschub-V ^ rlehtung according to claim 3 or 4,; because »"".-." By: ge ke η η ζ calibrated η et _s .that the pawl (24). Arranged on the ^ crank arm (21) adjustable 6) Goal correction after ^^ a deif • Claims j because you raw geke η η ζ ei eh η e t _} that the pivot range of the pawl (24) relative to the pivot arm (18) is adjustable »; 7) Torsehubvorrichtung according to any one of the preceding claims, dad urehgeke η η ze i ^ e; h . m. et, that the pivot arm (18) on his; the feed · - ^; towards the remote side a stop segment _; ^ (42) t3? Ägt, in front of which: a turret (44) parallel to the main shaft (4) ". F.eι rl on the axis' rotatably and lockably mounted ■ istyder along ^ its ^ em circumference several different lengths _, radial e 'Änsehl ägschraub en (43) on white, of -those each.- one with ^ .enf stop segment; (42) -in the pin of a corresponding limitation of the swiveling angle ded 'Sehwenkarmes (Ί8) · and thus cooperates in the sense of the reading / the working stroke of the push rod (33) .- />