DE1920953A1 - Feed gear for milling machine - Google Patents

Description

DA-3215

Description ',

to the patent application

the company

ELLIOTT MACHINE TOOLS LIMITED Victoria Road, London N ₀ W ₀ 10, England

concerning

Feed gear, fflr. ffifl. sma s. ch ine. Priority: April 24, 1968, No. 19 402/68 - GREAT BRITAIN

The invention relates to machine tools and in particular to console milling machines in which a vertically movable console or a knee table carries a console slide that can be moved horizontally on the console to obtain a transverse stroke, and which in turn triggers a clamping table for horizontal longitudinal movement perpendicular to the transverse stroke «

The invention is based on a machine of this type and a feed gear Directed for such a machine, various features are provided, which are related to the construction and manufacture such machines and feed gears simplify * <,

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In conventional console milling machines, complicated feed gear assemblies are used because of the requirement to obtain a full range of feed rates along all three major axes of motion, and just one method of the invention can greatly simplify the feed mechanism for a console milling machine by having gear shafts on only four centerlines Wear toothed elements, which are required to distribute the drive from a single drive motor along the three main axes of movement and, among other things, receive changes in the turning speed in all three axes, one shaft being a drive shaft that is mentioned by the · !! The motor is driven ₈ while each of the three other shafts serves to drive a special driven member, the rotation of which causes movement along one of the axes mentioned »

According to a further Merkeal the invention has the frss-K "machine a feed drive for driving a Aufspaanfiäches in jfeder direction lflngs one of three mutually stuk right main axes and nit a trigger biw _o Ausschalteln = ³ device for automatically switching off the drive BSim liatr" £ - is the mounting table at a given position from two de? mentioned axes "which release or" mechanism a single manually operated rod leelif imi axial b "wefl £ cli. is » * & vi® eino on» in «wink! movement that Stanfit responds to« nm ämm Mttieh llsigs άφτ mentioned two axes®a «iisiischalf ^ is h% w _o

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connect, and also a device which is on an axial Movement of the rod responds to select the axis along which the drive is transmitted o

The release device described simplifies the operation of the machine insofar as an automatic release, for example a lifting movement still has a power transverse stroke in any horizontal direction despite the fact that the console remains in a triggered state, which is a conventional one Machine would prevent a transverse force stroke until the upper vertical release cam has been removed or the Console has been lowered to avoid it. This is achieved with the help of a single switching element that can be operated by hand, which is suitable for actuation by means of a backdrop, whereby the possibility is reduced to a minimum that the Operator operated the machine incorrectly

Another important feature of the invention is one Simplified arrangement to achieve self-gear or speed without the use of an additional gear for this Purposeπ

The invention therefore relates to a feed gear for a milling machine with a first and a second shaft which are parallel to each other and to each other via a reduction gear are toothed, through which the feed drive to

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DA-3215

Distribution along three mutually perpendicular axes of movement is transmitted, which feed gear is a motor shaft <" that sits with each of the said two waves through one separate, only acting in one direction drive is coupled, which is arranged so that when the engine is operated in dar a direction of rotation a drive is transmitted to the first shaft and then via the reduction gear to the second Shaft, while when reversing the motor the drive directly to the second shaft, bypassing the reduction gear and a rapid drive for all three axes is obtained o

The aforementioned Morkaale are all in the following example special console milling machine described above. In the accompanying drawings show:

Fig. 1 is a front view of a console milling machine; Figπ 2 is a schematic view of the feed gear!

Figo 3 is a plan view "which a preferred control device" tion shows;

Figo 4 is a side view of a control rod of the device according to Figo 3 and

5 is a schematic view of another embodiment

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The machine shown in FIG. 1 has, in a manner known per se, a stand B with a vertical guide for a knee table or ", a console K", a console slide S, which is arranged on the console K for iron horizontal transverse stroke, and a work table T , which is arranged so that it can move back and forth * on the cross slide for horizontal movement perpendicular to the »cross stroke of the console slide * ₀

The console carries feed gear shafts on four center lines V _e C ₀ L and D _9. The feed drive for the three main axes is derived from a motor M with a worm (not shown) on its output shaft 0. This worm drives a worm wheel D1 which is mounted on a drive shaft D. This identifier is used for all of the gears shown in Figure 2 so that each gear is identified by the letter of the shaft on which it is located and by a number. An assembled gear D2 is keyed onto the shaft D, which works together with a free assembled gear Ct and a keyed assembled gear LI, which gears form a nine-speed gear, through which the shaft L is driven (when the feed drive gear is in operation) in any of the nine gears ait with respect to the shaft D. The shaft L carries a splined output shaft LS ₉ which transfers the drive to a reversing gear la bracket slide, from which the drive is transferred to the work table via a suitable coupling.

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The shaft L also carries a sliding claw coupling LZ, which is shown in Meshing with one of the driven gears L3 and L4, which are freely rotatable on the shaft L «When the gear L3 is selected, a freely rotatable sleeve carrying gears D3 and D4 is rotated in the same direction by a freely rotatable gear C2 driven like the shaft L. The gear L4 is immediate Engage D4 to move the sleeve in the opposite direction to be driven when L4 is driven by the pusher claw L2 o

Seated on the sleeve is a splined wheel D5 shown in its neutral position but movable in one direction for engagement with V2 for driving shaft V or in the opposite direction for engagement with CS for driving shaft C ₀ V the shaft causes a vertical drive through a bevel gear VI and a cooperating with this bevel gear which is fixedly connected to a driven Oled in the form of a Hubschnecke VS. The shaft C carries a driven link in the form of a transverse drive worm CS, which drives the console slide over the knee table

In summary, it should be mentioned that the feed gear is a continuous drive for the shaft L for the clamping movement forms as well as means for driving shaft C or shaft V, whichever is selected, in each direction of rotation, with the three shafts L, V and C in one of the nine gear HS-909845/1164

could be driven »

Each of the driven links VS, CS and LS is assigned a gear shaft V, _B, C and L, and these three shafts, together with the drive shaft D, form the entire feed gear required to distribute the drive from the motor M to the three main movements .

A common release rod for returning the reversing pusher claw L2 to its neutral position can be provided for actuation by claws on the console slide and by claws and stands, in order to trigger both transverse lifting and vertical movements in a manner known per se "

However, Figure _n 3 shows a preferred embodiment of a control device in which the trigger mechanisms are separated, so that the vertical motion "and Querhubauslösung are independently _o The device shown has a steering shaft 2 'which by means of a radial handle 3, which in a connecting link 4 can be moved, moved axially and angularly "Two radially protruding pins 5 and 6 are attached to the shaft 2, which are at an angle of 90 ° to one another and of which the pin 6, as shown, engages with a shaft 7 ic" with a rack portion S is formed, which "controls the position of the thrust claw L2 Further, on the shaft 2 from each other, two slices located at a distance 12 loading

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which does not grip the edge of the sliding wheel 05, so that an axial movement of the shaft 2 (which in turn is driven by the link 4) serves to drive the gear 05 into three operating positions "neutral", "vertical drive ¹¹ and ^w transverse stroke ^M" move without rotation of the gear or the shaft 2 su affect ₀ Two other radial pins 13 and 14 are provided at the inner end of the control shaft also in angle of 90 ° sueinander. As shown, the pin IS "acts it a" vertical ^ -Au * - Loose rod 16 together, which has a collar 17 in which a transverse groove is formed for opening the pin 13 * The left end of the rod 16 hits a head on which the claw can attack the machine stand so that when it is attacked as a claw end of a stroke slide rod 16 in the direction of preform is moved and therefore the shaft is rotated to its neutral position 2, is in softer the thrust claw hl out of engagement. " A laterally designed transverse-stroke release rod 19 acts together as the radial pin 14 and the distance between the pins 13 and 14 is such that only one of the respective release rods can come into engagement.

In the drawing, the axial position of the control shaft 1st such "daa the pin 13 on the vertical AuslOsestauge 16 engages and Sehieberad 05 in an engaged» »distribution old of the gear V2 hlltο OieRichtung of vertical travel is determined by the angular position of the shaft 2 and AEE" Pin 6 is bestiaat and the AuelÖsuBg is controlled by the Ausiösestange 16 and the pin 13 ·

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DA-321S

To select the cross feed instead of a vertical feed the shaft 2 is moved axially outwards and Im Gegeaagraphersimi rotated by 90 ° and then further outwards into the outer ge krOmaten slot of the backdrop 4 moves »As a result of these movements the pin 6 is moved out of engagement with the transverse shaft 7, wlh rend the pin 5 is moved into engagement and the pin 13 is moved out of engagement with the Ausldsestange 16 and the pin 14 in Engagement with the Ausldsestange 19. Furthermore, the shear wheel DS moved into engagement with the gear CS to the transverse lift drive wflhleno As before, the angular position of shaft 2 determines the Direction of the transverse stroke movement

This arrangement has the advantages of a simple design, a single manual control element for selecting a vertical or transverse stroke and the direction along each of these two axes, and the trigger mechanisms for the two axes are completely independent of each other «,

Figo 5 finally shows an arrangement in which a reversible electric motor M 'for the feed drive of the one rotational direction is used and for a BiIvorschub in the opposite direction, In this case, the motor drive shaft M ¹ O trlgt two screws with worm wheels DI and LS engaged stand, each of which is freely rotatable on its shaft and is coupled to its shaft by a coupling DU or LSI, which is effective in only one direction. The bilge worm gear LP can

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Have teeth at an angle of 45 ° to its axis, so that it can be driven by the motor M * in each direction in a ratio of one »In normal * operation, the motor drives in one direction and turns the two worm wheels in opposite directions ( Arrows F) _n The two clutches D11 and L51 drive in the directions indicated by the arrows Q, so that the clutch DI1 is engaged and drives the shaft D while the clutch L51 rotates freely, the course of the feed drives as in connection Bit Fig> 1 and 2 is described α For rapid traverse, the motor drives in the opposite direction, so that the clutch DII idles, while the clutch LSI drives the shaft L at high speed. If necessary, one or both of the last-mentioned clutches can be assigned directly to the respective worm wheel instead of the worm gear.

Those skilled in the art will readily recognize that the tripping devices are used and the Hilgtng drive, as described above, also used to control feed gear assemblies that have a different design as in Fig * I and 2 described.

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Claims (1)

Patent s prüche, ι. ί I ₀ J feed gear for a milling machine with a stand, a bracket arranged on the stand for vertical movement on this, a bracket slide that is mounted on the bracket for horizontal transverse stroke movement towards or away from the stand, and a clamping table that is mounted on The console slide for horizontal longitudinal movement is mounted at right angles to the transverse stroke movement _D is characterized in that gear shafts carry the gears on only four center lines, which are necessary to distribute the drive from a single drive motor along the three main movement axes, as well as to achieve speed changes in all three axes, one shaft being a drive shaft which can be driven by the motor, while each of the three other shafts serves to drive a particular driven member, the rotation of which causes movement along a respective one of the axes mentioned. 2 «feed gear according to claim 1, characterized by * net that one of the three other shafts mentioned has a change gearbox is coupled to the drive shaft so that it is driven at a range of speeds when the transmission is in operation is, with clutches being provided to determine whether .11. 909845/1164 DA-321S the driven member assigned to the respective gear wheel is itself driven or not, and the sliding element on the an * drive shaft between a first position, in which one of the other two shafts is driven, a second position, in which the other of the two shafts is driven, and one third neutral position is movable, in which neither of the two is driven. 3η feed gear according to claim 2, characterized marked chn e t that a sliding coupling on one of the other three shafts can be actuated to determine the direction of the drive, which is carried over to the other two waves. 4 ο feed gear for a milling machine with a first and with a second shaft, which are parallel to one another and interlocked with one another by means of a reduction gear, through which the Feed drive is transmitted for distribution along three mutually perpendicular axes of movement, marked by means of a motor shaft, which is connected to each of the two shafts mentioned by a separate drive that is “only effective in one direction” is coupled, the arrangement being made so that when the motor is operated in one direction of rotation, a drive is applied to the first shaft is transmitted, and then through the reduction gear on the second shaft, while when the motor is reversed, the drive is transferred directly to the second shaft while viewing the reduction gear and a rapid gong for all three axes Λ. " ¹² ~ 90 98 45/1164 is obtained. 5. Feed gear for a milling machine with a feed drive for the movement of a spanning iso in any direction along one of three mutually perpendicular main axes, characterized by an actuator arrangement sun automatic disconnection of the drive when the clamping device arrives at a given point along one of two of the axes mentioned, which release assembly is a single tape operable Having rod which is angularly and axially movable »with organs responding to the angular movement of the rod in order to to produce the drive along the two axes mentioned biw. switch off, and organs that respond to axial movement of the rod to select the axis along which of the drive Is transmitted. 6 * Feed gear for a milling machine according to claim 5 » characterized in that S is the rod with is coupled to a sliding wheel and is movable between three axially spaced locations, namely one first position in which the drive is transmitted along the one Aohee, a second position in which the drive is transmitted along a second axis, and a third position in which no drive is transmitted to one of the axes will. _ 13 - 90 9 845/1164 Ίο Feed gear for a milling machine according to claim 5 or 6, characterized in that the rod carries radially protruding elements for cooperation with two trigger shafts which extend transversely to the said rod and at an axial distance from this rod each of the trigger shafts with the radially protruding elements cooperates in such a way that an axial movement of each Auelöseechaftee can cause an angular movement of the radially protruding elements and the rod when the Aufspanntlsohes arrives at the given point mentioned, 8 "Feed gear for a milling machine according to claim 5, 6 or 7" characterized in that the bar mentioned can assume three angular positions which are spaced apart from one another and which correspond to the forward drive, the reverse drive or the neutral division " _14th 9098Λ5 / 1 Blank page