DE1534663A1 - Cutting head arrangement for a tunneling machine - Google Patents

Description

DR.-ING. WALTER ABITZ I bd 40 6 O _{8 Munich 2} 7, Pienzenauerstraße 28

DR DIETER MORF Telephone 483225 and 486415

Telegrams: Chemindus Munich patent attorneys

• 27o July 1966 284 709 -Div "II

R 38 024 V / 19 f - Tr. A. II

JAMES S. ROBBIES AND ASSOCIATES, ING. 500 Wall Street, Seattle, Washington, V. St. A.

Cutting head arrangement for a tunnel construction machine

The present invention relates to a cutting head assembly for an earth-moving machine with a transversely extending cutting head support and a circumferential one on the cutting head support attached cutting head, on the front wall arrangement of which cutting arrangements extend forward «

During tunneling and especially during those operating sections in which the cutting edges are against hard material work that opposes the rotation of the cutting head a considerable resistance, a considerable counter-torque generated, the son's head support OS and the rest of the parts seeks to rotate the shield counterclockwise. the end for various reasons it is desirable that the cutting

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head suction GS throughout. Tunneling his Retains original orientation.

The present invention is based on the object of designing the cutting head in such a way that it can be driven in the direction of the blade with the aid of reversible motors, the counter-torque being used during the rotation of the cutting head in the opposite direction in order to return the shield to its starting position the opposite direction of rotation of the cutting head C is aborted and normal operation of the same is resumed.

To achieve the stated object, the cutting head arrangement according to the invention is characterized by at least one on the circumference dar Yorderwandanordnung arranged cup, the only material can accommodate »when the cutting head is in a certain Kicht-turns, at least one more cup, around the circumference the said wall arrangement is arranged, and which, independently of the sound of the twisting of the cutting head, can accommodate material, a reversible drive for rotating the cutting head is provided.

In a further embodiment of the invention, the cup has eggs can absorb material regardless of the direction of rotation in opposite directions opening shovel on the

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have inwardly curved sections, which on the circumference the front wall of the cutting head rest against one another, wherein A material shaft extends radially inwards from the blades extends against the axis of rotation of the cutting head.

An embodiment of the invention is described in the accompanying drawings. Ee show:

Pig. 1 shows a partial view of the tunneling machine in operation, in FIG the cutting head and the cutting head support on one Are shown in longitudinal section;

Fig. 2 shows a cross section through the cutting head essentially along the line 2 - 2 of the pig. 1 which the alternating Arrangement of the ladially extending material shafts mj.d shows the maintenance cells in the cutting head?

Ilgo 3 Bin® top view of the face of the cutting head with partly new. Parts, c. Through which a toothed ring located on the rear side of the cutting head in engagement with two pinions serving to drive it can be seen, whereby it can also be seen that the cutting edges are only in the parts of the front wall of the cutting head form the Vorderwäu.de for the maintenance cells, including those cutting edges that

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on the front wall of the cutting head in the immediate vicinity Disposable cups are arranged in the vicinity

The Löunnelbaumaschine shown in Fig. 1 has a shield S, which has a generally cylindrical shell 10, the front portion in a known manner with a Cutting edge 12 is provided, and the rear portion of which is denoted by 14. Extends over the inside of the mantle In the transverse direction there is a cutting head support CS, on the front wall 16 of which a circumferential cutting head 0 is arranged, preferably with the help of a ring bearing 18, the upper race of which is firmly connected to the cutting head support CS, for example by a not shown visual cover arrangement, and its lower race on the rear wall of the cutting head, for example a viewing hood arrangement, also not shown, is attached «, Between the inner and empty race of the? Bearing 18 are in the usual way a number of rollers or balls »

The front wall 19 of the cutting head C is with a number of equipped with forward cutting, some of which are identified by the reference numeral 20. The cutting edges 20 are at different distances from the center of the cutting head C and cut concentrically as the cutting head revolves Grooves in the face of the tunnel, through which a complete Wegbrecihen the face of the tunnel to the depth of the

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Cuts is made. The attachment of the cutting edges 20 and their particular distribution is described in more detail below.

The cutting head C is driven via a number of Riteein, some of which are identified by reference numeral 22 in FIGS. 1 and 3 and those with a large 24 in Are engaged, which consists of one piece with the inner race 26 (Figure 3) of the bearing 18. The driving force will supplied by a number of reversible motors M. Ale especially A number of 10 motors have been found to be useful, 4 of which are above and 6 below the horizontal The center line of the cutting head support β GS are arranged,

_{A number of cups B 0} BB (FIGS. 2 and 3) are located on the circumference of the essentially disk-shaped front wall 2B of the cutting head C. The cups B are referred to as disposable cups because they are only curved or open in the normal direction of rotation of the cutting head C, which, viewed from the rear of the cutting head 0, is preferably clockwise. The buckets BB are curved against both directions of rotation and are referred to as two-way buckets. The Sehaufelabsohnitte FS, RS each have inlet sections 30, 32 and curved rear walls 34-36 through which the conveyed material is deflected inward. The two-way cups BB also have a partition 38 that extends from the meeting point

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the sections 34 and 35 starting a short distance radially extends inside. The partitions 38 prevent! that the material conveyed by the shovel opened in the direction of rotation is immediate then flows out again through the blade that is opened in the opposite direction of rotation, that is, they serve to remove the conveyed To guide material far enough into the material shafts 40, so that it continues its way through the shafts and not reversing the direction of flow from the downstream cup auefliesat again.

During normal operation of the machine, in which the son's head C rotates clockwise as seen from the rear, both the one-way cups B and the two-way cups BB convey material from the end of the tunnel when the cutting head G is driven towards the end of the tunnel . The cups BB * B each have radially inwardly directed material shafts 40 and 42, through which the conveyed material is directed onto a feed conveyor 44 which is at least partially located within a central opening 46 which extends through the cutting head support CS. A baffle assembly 48 is provided to guide the incoming material from the chutes 40 and 42 onto the feed conveyor 44.

During tunneling and especially during those operating sections in which the cutting edges are against hard material

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work that opposes the rotation of the cutting head a considerable resistance, a considerable counter-torque generated that the cutting head support ÖS and the other parts seeks to rotate the shield counterclockwise. For various reasons it is desirable that the cutting head support GS is on during the entire tunneling work Retains original orientation. If as a result of the counter torque a rolling movement or rotation of the shield against the Takes place clockwise, the cutting head is stopped and driven in the opposite direction with the help of the reversible motors M. During the rotation of the cutting head ^ in this opposite direction, the counter torque is used to the shield S to turn back to its starting position, whereupon the rotation of the cutting head G is canceled in the opposite direction and normal operation the same is resumed. During the rotation of the cutting head 0 in the opposite direction, the rear blades convey RS the two-way cup material and pass it on through the shafts 40 to the feed conveyor 44.

The feed conveyor 44 preferably consists of an endless arrangement of articulated metal plates that form a permanent assembly that can withstand the impact of the conveyed material falling from the shafts 40, 42 vriderstist. The feed conveyor 44 brings the conveyed material onto a longer conveyor 50, which consists of an endless one

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There is a band formed from rubber or a similar material . The conveyor 50 is arranged partially inside a tube section 52 of an erecting device , partially inside a conveyor tube 541 which extends from the tube 52 to the rear and is connected at its rearmost end to a collection device (not shown) which is fed by the conveyor 50 and which serves to transfer the conveyed material to a further conveyor which extends from the tunnel construction area to the outside of the tunnel - these last-mentioned devices do not constitute a rope of the present invention.

The shield S and the rotating cutting head C attached to it are driven by rams R, which are attached to the shield and supported themselves against the previously erected tunnel lining (pi ^ ur 1).

On the outside of the shield jacket of the cutting head support iat a cover H attached, the one in Figure 2 in extended Lines shown retracted position to an extended position indicated by dashed lines is displaceable. slide Cover H consists of sections HS (Figure 3), and at least some of the rams R, which are located behind the sections HS, are used as actuation devices for shifting the sections used. The sections HS of the cover are made with

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connected to the rams by a substantially radially extending, pinned plate 56 attached to its top is attached to the inner surface of the sections HS and extends radially inward and in a longitudinal direction of the shield in the cutting head extending groove 58 displaceable is. With the section HS retracted and the pistons extended, the ram R is a connecting rod 60, which is preferably consists of individual sections, one of which is used for each ramse R, at its front end with the plate 56, for example by a fork 62, connected and at its rear end with a collar 64, which is on the piston in the vicinity of the ram shoe section 66 is located. The collar 64 has an upwardly projecting shoulder 68 to which a fork 70, which is located at the rear end of the connecting rod 60, is attached. When operating the arrangement will be the pistons of the rams R are retracted and, as they move, take the sections HS of the cover with them and bring them in Your extended position = you will then be firmly attached to sections HS anchored to the cutting head support and the connecting rod 60 is withdrawn, so that the rammers in their main task, which consists in the forward movement of the tunneling machine, can be used.

According to FIG. 3, there are a number of rod-like spacers SB which are the same thickness as the sections HS

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having the cover, the peripheral side on the lower half of the cutting head support © CS attached to the Aussendurehmesser the lower half, which adjust the cutting head support to the upper half of the thickness of the portions of the cover includes _$. This will center the tunnel construction line relative to the tunnel.

The Seimeidkopf ö has, along the conveying wall 19 a substantially ring-shaped Eüekwand 72 to _0. The walls 19 vaiä 72 form between them a domestic? in which the material chutes 40 and 42 are housed »

As already mentioned, the material chutes 40 xmä 42 extend essentially radially around the cutting head C. Between the material chutes 40 and 42 or alternately there are a number of maintenance cells 74 "76 for the cutting head", the maintenance cells 74 abut SSER open side of the cup-Binweg B tmd terminate substantially sm scope of Torderwamd 19 d = s Seimeidkopfs where they are bounded by a wall umfangseitig®?. 8 The maintenance ropes 76 lie on the closed sides of the disposable Becaer B and have a wall 80 as a partial circumferential boundary. On the closed side of the disposable cup B, but radially outside the cutting head wall 19, there are so-called cups 82, which are extensions of the maintenance cell

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represent. As can be seen from FIGS. 1 and 3, the front walls 84 of the cup maintenance elbows 54 carry a number of cutting edges 20. The walls 84 form radial extensions of the front wall 19 of the cutting head 0 and are preferably constructed from plates; they extend in the lateral direction in order to also form the front side wall of the blade FS, which is open in the direction of rotation. On this occasion it is pointed out that the two-way cups BB have walls 86 consisting of plates which also represent radial extensions of the cutting head wall I9 . the walls 86 are constructed similarly to the walls 84, but of course do not have to cut... ■

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Claims (1)

27o July 1966 R 38 024 V / 19 f - Tr * A. II James S. Bobbins and Associates, Ine “2Ö4 709 P ₁ at, e η ta η s ν τ ü che Cutting head assembly for an earth-moving machine with a self transversely extending cutting head support and a circumferential the cutting head attached to the cutting head support »on the front wall arrangement of which the cutting edge arrangements move forward extend, characterized by at least one on the periphery of the front wall assembly arranged cup, the only material can take up «if the cutting head rotates in a certain sighting, at least one more cup, which is arranged on the circumference of said wall arrangement, and which, regardless of the direction of rotation of the cutting head, Can accommodate material, with a reversible drive is intended to rotate the cutting head « 2ο cutting head arrangement according to claim 1, characterized in that daes the latter cup a pair in opposite Has directions opening blade, which have inwardly curved sections, which on the circumference of the front » wall of the cutting head rest against each other, where ,, a material chute extends radially inward from the blades towards the axis of rotation of the cutting head. ORJGJNAL IMSPECTEO 12 - 9 0 9808/0776 709 3. The cutting head assembly of claim 1, wherein the cutting head has lugs extending from the door wall of the Cutting head extend radially outward, the Sohneiden and form the wall section of the disposable cup. 4. The device according to claim 2, characterized in that a partition extends radially inward from the point at which the S ohaufe lab cuts are opposite, which guides the conveyed goods inwards into the material shaft and prevents the goods conveyed by the shovel opened in the direction of rotation from immediately following flows out again through the blade opened in the direction of rotation. ο gate direction according to claim 1, in which the for inclusion ▼ on material when rotating in only one direction serving cup consists of a shovel with an opening and has a curved wall and a next to the latter arranged Sohneiden supporting portion on the at least a cutting edge is arranged. 6. Apparatus according to claim 5, in which the sons The bearing portion of the cup has an opening arranged in the vicinity of the cutting edge and on the side of the beaker of the die A bracket is attached to the cutting edge bearing sections, " ¹³ "'909808/0776 "I. 709 one made of a knife section and a sohaft chip takes up existing cutting edge, whereby the Meseerabechnitt 'the cutting edge through the opening at a predetermined distance from the section carrying the cutting edge this The cup extends forward, 7. Apparatus according to claim 6, in which the holder the Cut at an obtuse angle to the front wall of the Cutting head. - 14 - 909808/0776