DE8327478U1 - HYDRAULIC WRENCH WITH ROLL - Google Patents

Description

QR..SOLF & ZAPF

älassene Verlreler at the European Patentami Wuppertal · Munich

ipeen patent attorneys

Ik. September 19Θ3 + / II / CO / 298G

John Kurt Junkers, 7 Arrowhead Lane, Saddle River, Nsω Jersey 07 <t5B

Hydraulic wrench with roller

The invention relates to a hydraulic wrench for tightening or loosening threads provided connecting elements that connect a flange with a body D of the two flanges. 5

In particular, the invention relates to a hydraulic wrench with which a polygonal head of the with Threaded connecting element to be tightened or loosened, the polygonal head such

ID is arranged so that the space surrounding the axis of the threaded connecting element as well as the space above the polygonal head is very limited. Such wrenches are described, for example, in US patents k D79 6 * tl or h 336. During the tightening or loosening of a threaded fastener by turning a nut in one direction, a reaction force is created which tends to turn the entire wrench in the opposite direction. The wrenches known from the aforementioned patents have the ability to absorb this reaction force

ssbleiche 20 · P.O. Box 130113 ■ D-5600 Wuppe / tal, 1 patent attorney Dr.-Ing. Dipl.-Ing. A. SoIf (Munich)

> n (0202) 445096/451226 -Telefax (0392) 45-1226; , ·; . . · 'Patent attorney Dipl.-Ing. Chr. Zapf (Wuppertal)

: 8591273 soza · "" · '· ■; ■ ·; ·:: Pa {entamvalt Dr.-Ing. Dipl.-Ing. W. Hasse (Munich)

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on their supporting bodies contact elements for sliding Engage with a stationary, to the body to be turned on. This stationary body is usually a mother who is at the nut to be turned with the wrench is adjacent. A disadvantage of these known constructions it is that the opposing abutment elements, which usually have the shape of a plate, which is connected to the support body, slide along the stationary body with an extraordinarily large force, creating a considerable amount of friction which is evident in the effectiveness of the arrangement humiliated.

The invention is therefore based on the object of a hydraulic wrench of the initially Specify mentioned type, the a polygonal head of a threaded connecting element to tighten or loosen it, the space around the polygonal head and above this is severely limited, and the aforementioned shortcomings of the aforementioned, known hydraulic Wrench eliminated. Furthermore, the hydraulic wrench according to the invention be extremely simple and compact so that it can be manufactured at low cost as well high stability under long-term use and be relatively easy to use.

3D This object is achieved according to the invention by a Support body with a first section and a second section, which is integral with the first ab-

ft · ·

cut is formed; a hydraulic that one Having hydraulic cylinder which has an axis and is connected to the first portion of the support body is, wherein a piston is axially reciprocally arranged in the hydraulic cylinder, and with a piston rod which is connected at one end to the piston and an opposite free end having; a lever which between its ends with the second portion of the support body to a

ID pivot axis is connected that is transverse to the axis of the hydraulic cylinder, the lever at one end being pivotable with the free end the piston rod is connected and in the area of its other end receiving elements for receiving of the threaded connecting element to be rotated, wherein during such Rotating the threaded fastener creates a force in one direction is, which strives to the support body in the

2D opposite direction to pivot about the pivot axis; and at least one on the second section The roller located on the carrier body, which is arranged offset to the rear with respect to the pivot axis is, extends in the direction of the pivot axis, spaced from the lever and by a substantially is rotatable parallel to the pivot axis and is suitable on the periphery of the flange to counteract the force.

In this construction, the sliding friction created by the known contact elements is replaced by the rolling friction of the counteracting roller, which rests on the outer surface of the flange, whereby the efficiency of the screw wrench is considerable

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increases, an added benefit of this design is that this regardless of the spacing of the tightening nuts are applied from each other can, since the opposing contact elements do not require attached object adjacent to the nut to be tightened, as the opposing contact elements are in the form of a roller attached to the outer surface of the flange on which the To be tightened nuts are arranged, unrolls.

The hydraulic cylinder is preferably fastened in the region of its front end, this being the The end is from which the piston rod protrudes to the support body, the hydraulic cylinder uro having an axis of rotation is pivotably mounted.

Preferably, the aforementioned lever is releasable between its ends with the second portion of the Support body and detachably connected at one end to a free end of the piston rod, so that the Ii Lever can be exchanged for another type of lever.

For applications in which the space above a head can accommodate this polygonal The head of the threaded connecting element to be rotated is extremely limited, is the lever designed as a one-piece, flat lever, which is in the area of its other end with a polygonal recess for receiving the polygonal Head of the threaded fastener to be rotated, in this case the wrench disengages from the threaded one after each forward stroke of the piston

The connecting element has to be taken and is brought back into engagement with it after each backward stroke. If, on the other hand, the distance above the head for the use of the wrench is not extremely limited, the lever preferably has a ratchet gear or ratchet drive and consists of two drive plates, each of which can be pivoted about the pivot axis between its ends and is attached to a U. nue is pivotally connected to the free end of the piston rod and has a circular hole in the area of its other end, and with a locking mechanism which is arranged between the two drive plates and has two opposing pins which are rotatably mounted in the holes of the drive plates and which have a coaxial , have polygonal breakthrough, as well as with a pawl, which is arranged between the two drive plates and pivotally connected to them at one end

2.0 and at the other end with a corresponding one The tooth of the locking mechanism is engaged.

The support body is preferably provided with a substantially triangular plan and has a corner in the first section and two corners in the second section, jjobei the axis of rotation in the area of one corner and the pivot axis in one of the corners of the second section in front of the The axis of rotation is arranged, and with at least one ratchet in the other corner of the second section, which is arranged behind the axis of rotation.

Preferably it is provided that the first section of the support body is smaller than the second section

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is and ztjei laterally spaced apart side walls, between which the front end of the Hydraulic cylinder is arranged, wherein the second section is preferably a forked front Has end portion, between the ends of which a portion of the lever is received, and with a integral, rear end portion which carries at least one roller on one of its sides. Preferably the construction has two roles, of each of which is arranged on opposite sides of the integral, rear end portion.

Further advantageous refinements of the invention are characterized in the subclaims.

The drawings illustrate the invention on the basis of several exemplary embodiments, namely:

Figure 1 is a partially sectioned side view of the wrench according to the invention, uobei the section along the line I-I of Figure 2;

Figure 2 is a front view of the wrench shown in Figure 1;

Figure 3 is a front view of a lever for applications in which the space for the Application of the wrench is extremely limited; and

I O *

Figure k is a schematic view of a Geujinde connecting element which has a body provided with a flange ver with another body

binds, hereby the space for the application of the wrench is extremely limited, this applies in particular to the space available sneeze above the

element.

Figures 1 and 2 show that the inventive hydraulic wrench a support body which is essentially triangular Has plan and a first wider section la Bouiie a second narrower section Ib, which is integral with the first section ζ tissue π -hMngt, has. The first wider section la forms a pair of transversely spaced side edges 2 and the zuieite portion Ib has a forked front end or a left end and forms, uiie shown in the drawing, a pair of Illangen 3, which are transverse to each other at a distance from each other are spaced, the etuias smaller than those of the Side walls 2 and are connected to one another at the rear by means of an integral section k. A hexagonal bracket 5 that fits onto suitable lead rails at the front or left end of a hydraulic Cylinder 6 is attached, carries a pair of trunnions 7, which protrude in suitable lead from opposite sides of the holder and are rotatable in aligned, circular

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Openings B of Seitenuands 2 stored so that the Hydraulic cylinder 6 can be pivoted about an axis of rotation X in the area around its front end, the one in the top corner of the triangular shaped Support body 1 provided in plan is arranged and perpendicular to the Achee Y of the hydraulic cylinder 6 runs. A piston 9 is arranged to be movable to and fro in the hydraulic cylinder 6 and is displaceable between an effective forward stroke

ID to the left - as shown in Figure 1 - and a backward stroke by alternating loading or relieving with a hydraulic pressure fluid arranged, the displacement between the opposite ends of the cylinder 6 through known means takes place that are not in the drawing are shown. A piston rod 10 is coaxial at one end of the piston 9 for reciprocation attached to this and with its free end 10a protrudes beyond the front end of the cylinder 6.

Egg-; Lever 11 is between the carriages 3 of the forked front end of the second section Ib of the Trpgkörpers 1 arranged and pivotable by means of a pivot pin 12 for pivoting about a Mounted pivot axis Z, which runs parallel to the axis of rotation K and to this further forward and is arranged offset downwards. In the embodiment shown in FIGS the lever 11 consists of a pair of drive plates 13, which between their ends around a pivot pin 12 are pivotable and - as shown in the drawing - schuienkmobilisch at the upper end with the free end IDa of the piston rod by means of a Trunnions 14 are connected. The two drive plates 13 are in the area of their other or

Λ · t I

lower end with aligned circular Holes 15 provided, 'in which opposite pins 16 of a locking mechanism 17 in a suitable üJeise rotatably arranged aiird. The lever 11 also uieiat zuiei pawls 1Θ on that at their rear Ends are fastened in a suitable lileise in a recess of a pivot pin 19, which is in front of the pivot pin 12 is arranged, whereas the front ends of the two pawls 1Θ in corresponding, adjacent

Engage teeth of Besperres 17. A spring feather

20, which by a screw 21 in the area of a End is attached to the periphery of the pivot pin 19 is slightly in the area of its upper end on a bolt 22 which is above the pivot pin 19 extends to the drive plates 13 and, for example, can be detached by means of two screws 23 there is attached, which can best be seen in FIG. The flat spring 20 is used to Front ends of the pawls IB during the forward stroke of the piston in engagement with the corresponding To bring ZMhnen the locking mechanism and to cause the Ratchet pawls 16 over the teeth of the locking mechanism. The locking mechanism 17 has a coaxial, polygonal, preferably hexagonal opening Zk for receiving the polygonal head 25 of a threaded connecting element in order to be able to rotate it. This design preferably also includes a spacer bolt 26, which is arranged between the drive plates 13 at a distance from the bolt 22 adjacent to the periphery of the locking mechanism 17, which is best shown in the figure It can be seen that the length of the spacer bolt, like that of the bolt 22, is slightly different

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larger than the width of the pawls IS, so that the latter can be freely pivoted without resting on the drive plates 13.

The training also includes at least one Roller 27 rotatable in the region of the rear end of the second section Ib of the support body is attached by means of a journal 28, the Axis 1 is parallel to axis X and below is arranged offset to this and to the rear. This role 27, of which at least one is present, is arranged on the outside of one of the drive plates 13 so that they are axially offset in the direction of the axis 1 to the locking mechanism 17 located between the two drive plates 13 is arranged. This arrangement preferably includes rollers 27, which correspond accordingly are arranged on the outside of the two drive plates 13, as this is clear FIG. 2 shows.

The arrangement described above works as follows:

The wrench is used to turn the polygonal head of, for example, a nut 25 around a threaded shaft S of a screw, the lower end of the shaft being screwed into a bore in the body M_, as can be seen in Figure k, to press the flange F of a body M against the end face of the body M _0. A plurality of such threaded connecting elements, which must be rotated or screwed in sequence, are circumferentially spaced from one another

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arranged on the outer surface within the flange F. In order to rotate the nut 25, it is inserted into the opening Zk of the locking mechanism 17 and during the advance stroke of the calving 9 in the hydraulic cylinder 6, the drive plates 13 will pivot about the axis of the shaft 5, so that the pawls 1Θ the locking mechanism 17 in a counter-clockwise direction - uiie indicated by the arrow a - drive to the nut

ID 25 to be tightened so that the bottom surface of the flange F pressed against the upper surface of the body M. The pressure fluid lies during the forward stroke of the piston 9 against its rear surface and also acts on the closed rear end of the cylinder 6 and since its front end by means of the support pin 7 at the upper corner of the triangular Support body 1 is held, a reaction force is thus generated, which tries to the support body 1 in an opposite to that with the

2D arrow a designated direction to rotate around the axis of the pivot pin 12, ωas in the opposite direction Direction to the direction indicated by arrow b takes place. This reaction force is derived from the roller 27 is added, which rests against the periphery of the flange F in a rolling manner. Simultaneously, since the axis of the shaft S is the only fic point, the entire supporting body will move during the Move the piston 9 forward with an effective initial stroke and around the axis of the shaft S, furniture the roller 27 along the outer surface of the Flange F unrolls. Due to the pivotable mounting of the lever 11 between its ends with the support body 1, this forward movement of the support body creates an additional force for the

ί ί. I Il I * ··

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Rotation of the lock 17 in the direction of the arrow a, because the entire arrangement pivots about the axis of the shaft S. By attaching the The front end of the cylinder 6 at the upper corner 5 of the triangular Iragkörpers gets the entire Arrangement has a very compact structure, so that it is easy to use.

H The main advantage of this invention

si 10 Construction of course, the roller 27 off '§ rolling on the flange F is applied, the uobei

j! Sliding friction according to the known constructions

£ is transformed into rolling friction so that

it the effectiveness of the hydraulic

'& 15 delete wrench is significantly larger. f. A further advantage of the invention

^ That wrench is side by side

y. arranged nuts can be tightened,

% regardless of the distance between the nuts and

I 20 each other as the counteracting means in the form ? | of roller 27 not against an adjacent nut

f. but against the outer surface of the

ι 'the flange F, so that it is possible to

} To rotate a plurality of nuts each having a _f

. 25 have a considerable distance from each other.

There are also various applications in which the space H over the connecting elements :! - as shown in the figure h - for putting the wrench on the nut 25 is smaller

nls the distance U between the outer surfaces of the drive

■ Λ plates 13 from each other. For this purpose is the

Lever 11, which moves the two at right angles to one another.

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has upright drive plates 13, as can be seen in Figures 1 and 2, releasably attached by means of the pivot IU Bn.dem free end IDa of the piston rod 10 and also releasably by means of the pivot pin 12 on the front end of the second section Ib of the support body 1, sd that this is exchangeable for another lever, namely the lever 30 shown in FIG. The HeDeI 3D is a one-piece, essentially flat lever which has an upper, forked end 30a, between the two arms of which the free end 10a of the piston rod 10 is arranged and is detachably fastened to it by means of the pivot pin 1 *. The one-piece, flat lever 30 is pivotably and releasably attached between its ends by means of the pivot pin at the front end of the lower portion of the triangular support body 1, preferably two spacer rings 31 are arranged on opposite sides of the lever on the pivot pin 12, around the lever 30 centrally to hold between the dangles 3 of the forked front end of the support body 1. The portion of the other or lower end of the lever 30 is provided with a polygonal, preferably hexagonal recess 32 for receiving the polygonal head of the threaded connecting element in order to be able to rotate the latter.

With this construction, the lever 3D must be removed from the nut 25 after the piston 9 has moved forward and after the backward stroke of the piston they are set up again. Of course it happened

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in this construction, the loading and unloading of the pressurized fluid on or from the opposite ends of the cylinder in a manually controlled, known manner, wherein this is not shown in the drawings so that the user will be able to use the lever 30 of the mother turned at the end of the preaching stroke remove and set the lever 30 at the end of dea Rückuärtshubea bodice to the mother.

It will be understood that any element described above pillar two or more elements taken together would also have useful application in other types of hydraulic wrenches, that differ from the type described above.

While the invention is illustrated and described on a hydraulic wrench been iet to turn sequentially which serves the heads of threaded fasteners that are spaced from one another located within the outer surface of a flange from which the force exerted during the Rotating the threaded connector in one direction causes the spanner support to rotate in the opposite direction by means of a roller is recorded, which is rolling on the outer surface of the

The flange, it is not intended

limit these to the details shown, as there are various modifications and structural features Changes can be made without in any way departing from the spirit of the invention to give way.

Claims (10)

John Kurt Junkers, 7 Arrowhead Lane, Saddle River, New Jersey, 07458 V claims: f; 1. Hydraulic wrench to tighten I? or loosening of gev / inde provided connection £ elements that have a flange with a body or i | connect two flanges together, marked u 5 net through a support body (1) on which the swiveling fi movable a hydraulic cylinder unit (6,9,10) t is ordered with its free end (10a) with :. one end of a lever (11,30) is connected which : between its ends on the support body (1) by one 10 ne pivot axis (pivot pin 12) is pivotably mounted and in the area of its other end a receiving opening (opening 24; recess 32) for receiving the connecting element to be rotated ; has mentes, and that at least one around one l'j essentially parallel to the pivot axis (pivot pin 12) extending axis (1) rotatably mounted roller (27) for rolling on the periphery of the Flange is arranged on the support body (1). Schlossbleiche 20 · Posllach 130113 · D-5600 Wuppertal 1 Patent attorney Dr.-Ing. Dipl.-Ing. A. Soll (Munich) Telephone (0202) 445096/451226 ■ Telelax (0202) 45 1226 Patent attorney Dipl.-Ing. Chr. Zapl (Wuppertal) Telex: 8591273 soza . "."".."."".'."". . " Palentanwalt Dr.-Ing. Dipl. Ing. W. Hasse (Munich) m β rtm ■ · · · 2. Hydraulic wrench according to claim 1, characterized by the support body (1) with a first section (la) and a second section (Ib) which is integral with the first section (la) is trained; a hydraulic system having a hydraulic cylinder (6) having an axis (Y) and is connected to the first section (la) of the support body (1}, a piston ι (9) is arranged axially reciprocable in the hydraulic cylinder (6), and with a piston rod (10), which is connected with one end to the piston (9) and an opposite free end (10a); the lever (11, 30), which between its ends with the second section (Ib) of the Support body (1) is pivotably connected about the pivot axis (pivot pin 12) which is transverse to the axis (Y) of the hydraulic cylinder (6), the lever (11, 30) at one end being pivotable with the free end (10a) of the piston rod (10) is connected, and in the region of its other end the Receiving opening (opening 24, recess 32), and the roller (27) on the second section (Ib) of the support body (1) offset to the rear relative to the 'pivot axis (pivot pin 12) and is arranged at a distance from the lever (11, 30), and in the direction of the pivot axis (pivot pin 12) runs. 3. Hydraulic wrench according to claims 1 or 2, characterized in that the hydraulic cylinder (6) is pivotable about an axis of rotation (support pin 7) which is transverse to the axis (Y) of the hydraulic hydraulic cylinder (6) extends, and that the lever 11, 30) about the pivot axis (pivot pin 12) pivotable is, which runs essentially parallel to the axis of rotation (support pin 7). 5 4. Hydraulic wrench according to one or more of claims 1 to 3, characterized in that that the hydraulic cylinder (6) has a front end over which the piston rod (10) protrudes, wherein the hydraulic cylinder (6) in the area of its front end .schwenkbewegung around the Axis of rotation (trunnion 7) is mounted. 5. Hydraulic wrench according to one or more of claims 1 to 4, characterized in that that the lever (11, 30) releasably between its ends with the second portion (Ib) of the Support body (1) and also at one end detachable to the free end (10a) of the piston rod (10) is connected. . 6. Hydraulic wrench according to one or more of claims 1 to 5, characterized in that that the lever (30) is designed as a one-piece, flat lever and in the area of his at the other end - a polygonal recess (32) forming the receiving opening for receiving the to be rotated Has connecting element. 7. Hydraulic wrench according to one or more of claims 1 to 5, characterized in that that the lever (11) is a ratchet mechanism or a ratchet drive (locking mechanism 17). 8. Hydraulic wrench according to claim 7, characterized in that the lever (11) of two parallel, laterally spaced drive plates (13) is formed, each of which pivotable about the pivot axis (pivot pin 12) between its ends and pivotable at one end is connected to the free end (10a) of the piston rod (10) and in the area of its other end has a circular hole (15), and with a locking mechanism (17) between the two drive plates (13) is arranged and two opposite, rotatable in the holes (15) of the drive plates (13) has mounted pin (16) which has a coaxial, polygonal opening forming the receiving opening (24) have to take on the connecting element to be rotated, as well as with at least one pawl (18), the two drive plates (13) is arranged and pivotally connected to this at one end and at its other 3nd is in engagement with a corresponding tooth of the locking mechanism (17). 9. Hydraulic wrench according to one or more of claims 1 to 8, characterized in that that the support body (1) has a substantially triangular plan and in the first Section (la) has a corner and in the second section (Ib) two corners, the axis of rotation (Trunnion 7) in the area of one corner and the pivot axis (pivot pin 12) in one of the corners of the second section (Ib) in front of the axis of rotation (trunnion 7) is located, and that at least one roller (27) in the other corner of the second Ab -. section (Ib) located behind the axis of rotation (support pin 7) is arranged. 10. Hydraulic wrench according to one or more of claims 1 to 9, characterized in that that the first section (la) of the support body (1) is wider than the second section (Ib) and two has laterally spaced apart side walls (2), between which the front end of the hydraulic cylinder (6) is arranged, wherein the second section (Ib) has a forked, front end section has, between the ends of which a portion of the lever (11, 30) is received, and with an integral, rear end portion which carries at least a roller (27) on at least one of its sides. 11 · Hydraulic wrench according to one or more of Claims 1 to 10, characterized by two rollers (27), each one on opposite sides of the integral, rear End portion is arranged.