DE1484648A1 - Hydraulically pivotable boom, especially for deep buckets - Google Patents

Description

Corporation

(2832),

Jiydrauli.-ch veruch./sn^oarer boom, esp Tiäfluffel

The invention "refers to a; .yurauliocL ver & clTweii, Jbaren cantilever, in particular for Tieflc-iLel, uit eiu-iu .jch.jsnkzylinö / jr, whose cavity .. 'is fixed by -aineii. jir "bew-e? i '. flat, .verbundenen with the trailer body ~ \ / ei ^ volujienv rHncieiliahe Pressure-iräume on rateilt is * Dl * iditol Jen Br fiiiüun ^ rf ^ e ν'anstand zn be solved is seen in the pivoting device of Auslesers Vorkebrunnen to meet an er.Juhutt3ru11g.y- and harm-free bcmvenicen of the reader in the JSndsxellun ^ eii. to reach. |

It is an at the rear end of a Riiuosnsehl ^ ppers iai,: obauter backhoe bucket known, d-esaen Aus-le ^ er horisont ^ .l and vertically vech-.venkbar. Uiti being able to carry out the horizontal movement is the lower end. angibsut venkaylinder, in turn, to eine.a.iait -oeu Eau - to a _bch:; enschlepper joined main frame to ^ eor net ibt. .iJies ^ r ocLv / en-zzyiincier uiafai ^ x an auxrechtötenden Eohlsylinaer, Jer oueii aiiu down by _t ie a lid off ^ eciichtst i: -; t. This unit χβτ rotates around a featütehende, continuous vertical column. The Eiiii / rauu of the HohlzylihUers is divided into two sealed pressure räuine, and znax connected by a ait of the column and a ^ n ..iit deia cabbage cylinder, - arti; en body. Because over '^ ohlaylinaei ·' to. l> au .en iaio the second {

Body drel; bs.r, the Baule and he ate üex body but unbev / _e: lent sinu, änuern bei.ii to pivot the volume of Drucicräune. In;] eden Drucj.; R £ iuia opens a line, ciie anaerenend ωχ t the Zydraulikanla. ;; e of the caterpillar body is connected and from there alternately the pressure medium can be acted upon. If the iia rjarisen be brought to about 180 ° horizontal verschwöiikbäre Tieflöfiel a] jjndstel ~ lung, as in the one pressure chamber, the pressure medium is passed, whereby there is increased the pressure and the beviegliche body Wiru moved until it by an image formed by printing medium , non-escapable cushion located between the two bodies is stopped. This process results in ^:

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Print medium from the shrinking .Druckrauni back into the Hydraulic system of the crawler tractor. * _ .. _.- ^ ..

This arrangement has the disadvantage that "the movable body in ·" Kohlsylinder üaiuit and also the backhoe are suddenly stopped when ^{"bflußbohrung"} in decreasing Druckraurn'die A run over by a movable body is una dauit sealed. The υ 1 still present in this pressure space can no longer escape, so that the boom is suddenly stopped. This process results in vibrations that can destroy parts of the backhoe. The vibrations are very strong because the heavy backhoe bucket with its load due to "its inertia ait" force "at the stop formed by the Drudtineuiujii anatöüt."'" ■■ - ■ - ■ - ■■■ * ■■

The posed Aux.y & be will-enjoy the Drj-'indun :; essentially; ■ Solved by the fact that in each pressure chamber "a throttle system that delays the escape of the pressure or gradually decelerates the immediate movement of the driver is built in. On this" =: .Veise-, the aualer is installed before it is reached its final stables gradually waning _; .ebreust, so dai3 blast-free to Ötillsti-na> coiarat. This in turn avoids damage to the boom which "otherwise" occurs when the boom is suddenly braked.

The Eriinciunp sees in detail; arranged in the cylinder, on the one hand in the pressure chambers, on the other hand in a at _: spie, lövveic: e with the hydraulic system, ge of a üciileopers connected oil collection hole, through the movable body sequentially closable throttle bores, through which the pressure medium at small .- Grazing pressure r & um flows back into the hydraulic system.This anoranting has the advantage that already existing and anyway required components only need to be provided with the aforementioned throttle and Ba ^ iirielbohrmigen in order to achieve the gradual braking of the movable body or the boom.

According to a further suggestion by the Srf inctung, there is a pressure room of the. Hydraulic system off -.- via at least, on. Valve and over

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The channels provided in the movable body can be acted upon by the pressure medium, which returns to the hydraulic system through the throttle bores, the seam bores and the valve is used, although it only opens in the direction of the pressure chamber. Advantageously, each valve has a housing screwed into the channel, which is connected to a central axis at the blind end indirectly via a quartz bore with the throttle bores and the hydraulic system and an axially larger in the pressure space opening into bore portion Durchnesüers is provided in the superimposed displaceable a valve body. the Ventilkörpor may have according to the invention square ä profile »whose diagonals wide key to the diameter of the widened bore part and its corresponding Deia diameter of Sacktohrung and on its end face facing the pressure chamber with cross-shaped n Guard can be provided for the unhindered flow of the pressure medium · This design of the valve body has the advantage that its surface serves as a guide and at the same time as a passage for the pressure medium. Furthermore, according to the invention, the valve body can be displaced between the shoulder formed by the confluence of the blind hole in the enlarged hole part and a locking ring inserted in this tsil and seals the sacic hole when it rests on the shoulder, while the valve is open when the valve body rests on the locking ring * '

Details of the invention can be found in the description below and can be seen from the drawing, which shows an embodiment of the Inventions arose from the light of day. It works

1 shows a hydraulic deep-bed digger attached to the rear part of a tractor in a perspective view Depiction,

2 the z \? Iach «n deu lower end of the backhoe and mn. Tow-door attached Kauptrahueii Yorrichtung zvm V «richwenk * n the deep spoon in large space

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Scale, also in perspective,

Pig. 3 a vertical longitudinal section through the swivel front direction and its support on an even larger scale,

4 shows a cross section through the pivoting device along the line 4-4 of the Pig · 5 »

Pig. 5 shows the rear view of the main part of the pivoting device belonging ochwenkaylinders,

Pig 6 a section along line 6-6 of Pig 5,

Pig. 7 is a longitudinal section through a valve along line 7-7 of Pig. 5, but rotated by 90 ° drawn, and

Pig. 8 shows a cross section through the valve along FIG Line 8-8 of the Pig. 7th

In the drawing, 10 denotes a backhoe, which has a horizontally and vertically pivotable boom 20. The latter is supported at its lower end by a main frame 21 and, in its vertical position, is controlled by a hydraulic cylinder 24. The backhoe bucket 10 is also provided with a dipper stick 25 which can be pivoted about a pin 26 at the outer end of the boom 20 by means of a hydraulic cylinder 27. At the outer end of this dipper stick 25 , a spoon 31 is pivotably arranged at point 30, which can be actuated by means of a hydraulic cylinder 32 and for this purpose is provided with a tilting linkage 33 which is connected to the hydraulic cylinder. Instead of the 31 Löfiels other Erdbewegun _t .svorrichtun {fen or -gerate may be provided, of course.

For example, with aeia rear end of a tugboat connected · main frame 21 comprises a plate-shaped, transversely extending in the direction of travel of the tractor

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frame, which is supported by two retractable supports 35 and 36 supported on the ground. This guide frame has his rear side two parallel, horizontally extending over its entire length, raised guides 37 and 38, the each have a row of holes 39 arranged in parallel. On these guides 37 and 38 is a stable holder 40 by means of in the Bores 39 engaging screws 50 and 51 releasably attached, an upper guide bar 41 and a lower guide bar 42 (Fig- 3). the latter encompass guides 37 and 38, whereby the holder 40 is safely guided and after loosening the, Screws 50 and 51 can be moved. The holder 40 is provided on its back side with two support surfaces 43 and 44, which rest on the guides 37 and 38 of the main frame 21 and serve as a slide and guide track · For the same purpose the holder 40 has a projection 45 on its rear side so that in this way the holder is safely guided in every position.

The holder 40 further comprises ζ a rearwardly extending, spaced support arms 46 and 47, the free ends of which each have a bore; 48 and 49 are provided, the align with each other. From the outside, these bores 48 and 49 are covered by caps 55 and 56, which their side through Screws 57 and 58 are non-rotatably connected to the support arms 46 and 47 are. The sealing caps 55 and 56 each have a Y / roller bearing ( 59 and 60, which can also absorb pressure forces acting obliquely on them. In the rolling bearings 59 and 60 there are two covers 61 and 62 of an upright swivel cylinder 63, which is connected to an intermediate central, hollow cylinder-shaped single chamber 64 of the swivel cylinder by means of screws 65 and 66 are firmly and sealingly connected.

The upper cover 61 of the swivel cylinder 63 has an inclined " rearwardly and upwardly projecting carrier 70, to which the lower part of the hydraulic cylinder 24 is articulated for vertical pivoting of the boom 20. "The

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The lower cover 62 of the swivel cylinder 63 had a rearward, backward and downwardly inclined beam 71, which is pivotably mounted on the lower end of the boom 20 by means of a bolt 3. When the length of the hydraulic cylinder 24 changes, the boom 20 is swiveled vertically to the swivel cylinder 65 can be ¹ when the boom 20 has reached its highest position * In this way, the "hydraulic 'cylinder 24 is relieved when' the bucket 10 is out of function / ·>*" - · '- ■' ■ ■ -

Both covers 61 and 62 of the swivel cylinder 63 have an axial bore in which the ends of an upright cylindrical tubular column 80 'are supported; equipped bore; the lower 'cover cap 56 is in such a way that ^; the column 80 opposite the cover cap and so that your holder 40 cannot rotate. The pivot cylinder 63 itself can, however, be rotated around the column 80 by being attached in the holder 40. In the area of the covers 61 and 62, the column 80 is surrounded by seals 82 and 83 ^Λ so that no oil can escape. '

In the annular chamber 64 of the swing cylinder 63. If örmigei ¹ ■ body 85 by means of fastening elements 87 and 89 secured .an the column 80, this corresponding bores 88 and 90th This body 85 extends - "extends" - from the outer surface of the 'column 8' to the inner wall of the chamber 64 and for this purpose is shaped according to its radii of curvature. The length of the body 85 is equal to the height of the hanging chamber 64 · The body 85 χΒίΓείϊΓ ^

the places with which he touches the column 80, the 'inner wall of the barely 64 and the cover 61 and 62, with longitudinal grooves for a ring. shaped seal 91 is provided. "·; -.: = .- * ■ < . ■■. ■ -..- .. ^. ...,.,

Towards the body. 85- ipt .in- 4em ·: gap and inner wall of the | Cammer 64, a second T-shaped body 95 is provided.

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see, Aeeeen-Ittng · is equal to that of body 85 · This second body has at its the radii of the inner wall of the input. chamber 64 and the outer wall of the column 80 shaped accordingly “It is operated on and on the surfaces in contact with the lids 61 and 62 also seal body 98 and is means Screws 96 connected to the chamber 64. So it is so that when the ßohwenklsyj.indtre 63 is turned, the body 95 is carried along while the body 85 remains standing with the annulus of the cylindrical chamber 64 through both bodies 85 and 95 'in • wti rooms 125 and 126 are divided perfectly from each other are separated and sealed and depending on the position of the body 95 are of different sizes (fig 4)

The arched outer wall of the body 95 has two perpendicular, parallel grooves 100, which are followed by two horizontal grooves 101 located at the foot of the body (FIGS. 4 and 6) The grooves 100 and 101 lind eo arranged that they are each in one Trough space 125 or 126 of the annular chamber 64, i.e. no connection on the outer wall of the annular chamber 64 of the pivoting cylinder 63, two valves 102 and 103 are provided, the one end via bores in the annular chamber wall with the solder grooves 100, the other end via hoses 104 and 105 and the usual not shown valves with the hydraulic system of the Connected to tractor 11 These valves can be connected to ' be controlled by a lever 16 attached to the main frame 21 »

On the lower cover 62 of the swivel cylinder 63 are two horizontal, j parallel, blind-ending collecting bores 106 and 107 are provided, each via a row of Drotsel bores 108 and 109, respectively, with the Rixtgkanmer 54 are connected in such a way that the Drotstlbohrungen in A space separated by Mrptr 85 and 95 open out (Fig. 4) « If the swivel cylinder * 63 and with it the body 95 out of the in flg · 4 Aar £ tsttilitn $ ftgt nmoh dtr one or the other direction f «rotates, it becomes the vertical bores 108 or 109« uroh dit uattr · filth · dtt body · n »oh · one another gttohlotttn · Auf dittt

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Way is the outflow of a space 125 or 126 of the Rinbkammer 64 is reduced, whereby the horizontal pivoting movement of the swing cylinder or the backhoe bucket is slowed down and. eventually comes to a standstill. It is of course possible to attach the throttle brackets 108 and 109 differently, than shown in FIG. So it is possible to reduce the throttle bores to be arranged with equal or unequal distances or staggered

The samiael holes 106 and 107 in the lower cover 62 of the swivel · Cylinders 63 are connected to the valves via lines 110 and 111 102 and 103 connected in such a way that a screw-in socket 112 or 113 »on the other hand, an angle connection 114 or 115 is installed between the valves and the upper ends of the line.

The valves 102 and 103 are of the same type, so that only one valve needs to be described below. The case of the valve 102 is designed, for example, as a hexagon, about a third of which is threaded to the surface Screwing into the swivel cylinder 63 provided i ^ t. Exactly in A blind hole 117 is located on the center axis of the valve housing, the open end of which is connected to the vertical cap 100 of the web 95 and the other end via a transverse bore 116 with the hose 104 or 105 and the line 110. 111 is in communication. The blind bore 117 of the valve has at its open end an enlarged cylindrical part 118, which at the transition to the SacKbohrung a shoulder 119 forms. Steep in this hole 118 supports a square valve body 120, the diagonals of which correspond to the diameter of the bore part. on the other hand the hatred of the width across flats of the valve body 120 is equal to that Diameter of the backbohrunt · 117 so that the latter from the valve body can be closed. The valve body 120 is within the bore part 118 between the shoulder 119 and a bicfeerungsring moveable. So that when one of the end faces of the valve body is in contact 120 the passage for the oil remains free on this ring, this end face is provided with cross-shaped grooves 121.

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The invention s:, a swivel device works as follows »

Should, for example, the swivel cylinder 63 and thus the backhoe bucket 10 according to Pig. 4 can be brought into one binding position counter to the clockwise direction of rotation, by operating one on the main frame 21 ■ arranged hand lever under pressure Oil through the hose 104 * the bores 116 to 118 of the ' of the pressure open valve 102 and the hats 100 and lOl of the body 95 in the room 126 of the Ringicaiüiaer 64. Simultaneously The "oil" also passes from the bore 116 of the housing of the valve 102 via the line 110 and the bores 106 and 108 into the Said room of the Ringkamuer 64. The pressure building up there moves the body 95 counter-clockwise. In the as a result, the space 125 of the annular chamber 64 becomes smaller (Fi ^. 4) the oil present there escapes through holes 109 and 107, the line 111 and the bore 116 of the housing of the valve 103 » from where the oil in the hose 105 and damix back to the Sole oper hydraulic arrives.

The valve body 120 is in this curtain on paragraph 119 of the Housing of valve 103 on, so the valve is closed, so that the oil flowing off through the hose 105 does not again reach the annular chamber 64 via the hats 100 and 101 of the web 95 can. The valve remains closed because the end face of the valve body 120 is larger than the cross-sectional area of the Saclibohrun ,: 117. As a result, the closing force is greater than the opening force. In addition, the pressure in the hose 105 is less than in the decreasing space 125 of the annular chamber

When pivoting the web 95 counterclockwise rotation through its lower surface all throttle bores 109 one after the other covered so that less and less oil can escape until the oil drains eventually stops completely. This is how the body becomes or the iieflöffel 10 gradually decelerated. Does the body have 95 the last throttle bore 109 covered, so that forms in the there is now a small space 125 between the bodies 85 and y5

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Oil a pad that forms an ideal stop for the body 95. The oil located here cannot escape, either through valve 103, as the oil pressure tightly closes the valve

If the Sieflöfiel 10 "is to be brought into the" endore end position, so the oil pressure in the hose 105 must be increased in such a way that. the valve 103 opens and oil enters the space 125 of the Ringkainner 64 got. Swivel the oil pressure or the amount of oil flowing in now the body in a clockwise direction, whereby the Drosaelbohrungen 109 become free and also ΟΓ flow out permit. D-: r üori ^ e swiveling process corresponds to the previous one described !! braking process.

Patent claims

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Claims (1)

Claims fl7 \ Hydraulically pivotable boom, especially for backhoe buckets, with a swivel cylinder, the cavity of which is divided into two volume-variable pressure chambers by a fixed body and a movable body connected to the boom, characterized in that in each bruok chamber (125 or 126 ) a throttle system is built in that slows down the pressure medium and gradually decelerates the pivoting movement of the boom (20). . ■■ ■ · ■ - - ■■ ■ '< 2 «Drosselsyatem according to claim 1, characterized by arranged in the 'swivel cylinder (63) on the one hand in the pressure chambers (125 or 126), on the other hand in a collecting bore (106 or 107) connected, for example, to the hydraulic system of a tractor, through the movable body (95) successively closable throttle bores (108 or ^; 109) »through which the pressure medium flows back into the hydraulic system as the pressure chamber becomes smaller · 3 · throttle system "according to claim 1 and 2, characterized in that that every Xtruokraum (125 or 126) from the hydraulic system from at least one valve (102 or 103) and via im movable body (96) provided channels (100 and 101) through ( the pressure medium can be acted upon, which through the throttle bores (108 baw. 109) »the collecting bore (106 or 107) and the valve flows back into the hydraulic system 4 · Throttle system according to claim 3 »characterized in that each Valve (102 or 103) a housing screwed into the Äingkammer (64) expands, which has the same central axis its blind end indirectly via a transverse bore (116) the throttle oil bores (108 or 109) and the hydraulic system connected jack bore (117) and a coaxial, in the pressure chamber (125 baw · 126) opening bore part (118) larger / 12 909810/0256 Durehueseers is provided in which a valve body (12Ö) displaceable. 5. Throttle system according to Ansi.rueh 3 and 4 »characterized by da.d the vent liqueur (120) has a square profile, whose diagonals are the diameter of the enlarged hole part (118) and its bowl shape have the diameter of the Si-.ckbohrun (117) and the at his de: a Druckram (125 buv; »126) facing face iii \ kreusförmit'en ITuten (121) Euia un ^ eLinaerteii flow of the print medium is provided. 6. Throttle system m-ch a ο α he more he s of the vor-iierii-. An address, characterized in that the V = n "Lil body (120) between the Sinwüiidim. ;; the Ui : cktOhrur.-, (117) in the dilated Bohr Un ₀ steep (HS) /.cfiläbteji From & at ε (119) unu an oicr.exuii, oriiiö "v & rüchiölibar is used in this part and beii.i jjtilisi_en et al. Paragraph the t>uci; boi.run _; . seals, while when the Y-; r.tilkür ers ai.i üi ehe run ^ iin _t .; the valve (102 "ksro. 103) a eof. net i.Lt. BAD OBiGiNAL 909810/0256