EP3153279A1 - Hand tool in the form of expanding pliers - Google Patents

Abstract

The invention relates to a hand tool (3) designed in the manner of a spreading forceps, having a first hand grip (1) and a first tool part (6) having a hand lever (1) and a second, a second grip part (16) and a second tool part ( 15) having hand lever (2) which are pivotable relative to each other, wherein the tool ends (9, 18) of the tool parts (6, 15) in a common plane (22) are arranged and in a receiving groove (71) has a bore (66). a component (65) are insertable such that the tool ends (6, 15) with circumferentially spaced apart end portions (72, 73) of a seated in the receiving groove (71) retaining ring (70) by operating the handle parts (4, 16) Hand lever (1, 2) can be brought into engagement. In order to be able to safely remove, in particular, inner securing rings from a receiving groove of a bore with a hand tool (3) designed in the manner of a spreading forceps, it is provided according to the invention that one of the tool parts (6, 15) relative to the other tool part (15, 6) is so relative to the receiving groove (71) is adjustable, that with this tool part (6, 15) engaging end portion (73, 72) of the locking ring (70) is bent out of the receiving groove (71).

Description

In the manner of a spreading pliers trained hand tool with a first, a first handle part and a first tool part having hand lever and a second second handle part and a second tool part having hand lever, which are pivotable relative to each other, wherein the tool ends of the tool parts are arranged in a common plane and can be inserted into a receiving groove of a bore of a component such that the tool ends can be brought into engagement with circumferentially spaced ends of a seated in the receiving groove retaining ring by operating the handle portions of the hand lever.

Circlips or snap rings called, have long been known in mechanical engineering. They serve primarily for the axial fixing of components on a shaft or in a receiving bore. Thus, retaining rings are used as so-called. Inner retaining rings for bearing protection in a receiving bore and as so-called. External retaining rings for securing the position on a shaft or axle. If a component is to be fixed axially in a bore, so as to receive the inner securing ring, hereinafter generally called circlip, provided in the bore a corresponding circumferential receiving groove into which the securing ring can be inserted. In order to use this locking ring in such a receiving groove, it is necessary to deform this spring elastic, so that its diameter can be reduced. In this regard, such retaining rings are "slotted" formed and accordingly form two circumferentially spaced end portions, so that the retaining ring can be "compressed".

In this case, retaining rings of different designs are known, in particular to disassemble, that is, the removal of such a retaining ring from the receiving groove can accomplish.

For this purpose, there are retaining rings, which are provided in the region of their end portions with radially inwardly projecting eyelets, with which a specially trained so-called. Circlip pliers can be brought into engagement. For this purpose, such a backup tongs on two hand lever, which are pivotally connected to each other. The hand levers are provided on the one hand with handle parts over which the circlip pliers can be actuated. Opposite these gripping parts, each hand lever forms a tool part whose free ends are, for example, in the form of a pin, in order to be able to be engaged with the eyelets or the bores of the eyelets of the securing ring.

If such a circlip pliers is in engagement with these eyelets and if the hand levers are correspondingly actuated by way of their gripping parts, then the distance of the tool parts is reduced. Thus, the locking ring is simultaneously stretched radially inward, so that the distance of the two end portions of the retaining ring is also reduced. By this tensioning of the retaining ring is reduced according to its diameter. With appropriate dimensioning of the distance between the two end portions of the retaining ring thus the retaining ring is so far "compressible" that this can be removed from the circumferential receiving groove of the bore.

Next inner securing rings are known in which at least one of the end portions has a radially inwardly directed leg. This leg can be used to disassemble the inner locking ring from the associated receiving groove with a conventional pliers. By a rotating movement of the leg engaged with the pliers, a reduction of the diameter of the inner locking ring can also be effected at least in the end region of the leg, so that the inner locking ring can be taken out of the receiving groove axially.

Furthermore, retaining rings are also known, which can be used correspondingly on a shaft or an axle in a receiving groove. In order to be able to remove such an external retaining ring, which may also be provided with radially outwardly projecting receiving eyelets, from the receiving groove, so-called spreading pliers are known. These spreader tongues also have two hand levers, which each have a handle part and this with respect to a pivot axis opposite tool part.

In the case of these spreading collets, the actuation of the grip part or of the grip parts causes an enlargement of the distance of the two tool parts, so that an external securing ring can be spread open by means of such a spreading forceps. For this purpose, spreading spears are known, which are formed in a pin-like manner in their free end portions of the tool parts in order to bring the tool parts with the eyes of a locking ring in engagement. Are these pins of the tool parts with the eyelets of the locking ring into engagement and then the spreading pliers operated on their handle parts, so increases the distance of the tool parts with the effect that the retaining ring is widened and thus can be taken out of a circumferential receiving groove of a shaft or axle.

Furthermore, but also circlips are known which are not provided with such eyelets or radially extending legs. Such circlips have, for example, ends whose end faces extend obliquely to a radial or tangent of the ring. Here is, for example, on the DE 10 2012 016 491 A1 directed. In this document, a round wire locking ring is described, the ends of which is provided with inclined end faces. In that regard, full reference is made here to this document.

This document further describes an associated hand tool, which is designed in the manner of a spreading pliers, which is provided in particular for mounting and dismounting of such round wire locking rings.

For this purpose, this spreading pliers as a lever jaws designated tool parts, which are provided with functional surfaces. These functional surfaces of the two tool parts are also chamfered, so that they "match" with the end faces of the end portions of the round wire locking ring are engageable. In this case, the special configuration of the end faces of both the end portions of the round wire locking ring and the lever jaws, the engagement be designed to the effect that a used as an inner locking ring in a receiving groove of a bore round wire locking ring can be "leveraged" by means of this Spreizzange.

Since the distance between the end faces of the lever jaws is increased during actuation, however, the round wire locking ring is pressed into the receiving groove of the bore with appropriate actuation. The inclination of the lever jaws in conjunction with the inclination of the end faces of the Runddrahtsicherungsringes to cause here, however, that the ends of the round wire locking ring along the inclined end faces of the lever jaws of Spreizzange "slide" so that the ends are adjusted with their oblique faces of the Runddrahtsicherungsringes at least in these end regions of the receiving radially inward, so that subsequently at least these end portions can be adjusted axially, which in turn should be effected in the bore a reduction in diameter of the round wire locking ring.

This combination of the round wire locking ring with its oblique faces and the associated hand tool can not be used for inner locking rings with a rectangular cross-section, since the radial adjustment in locking rings with rectangular cross section can not be accomplished so that at least the end portions are completely adjusted out of the receiving groove radially inwardly can.

Accordingly, the invention has the object to design a trained in the manner of a spreading forceps hand tool so that in particular inner locking rings can be safely removed from a receiving groove a hole.

The object is achieved according to the invention together with the features of the preamble of claim 1, characterized in that one of the tool parts relative to the other tool part is adjustable relative to the receiving groove, that the projecting with this tool part end portion of the retaining ring is bent out of the receiving groove.

By means of the configuration according to the invention, it is possible to bend at least one end section of a retaining ring seated in a receiving groove of a bore radially out of the receiving groove to such an extent that this end region can be removed axially from the receiving groove.

Further advantageous embodiments are the dependent claims.

According to claim 2 it can be provided that the tool parts facing each other, arcuately extending, lateral support surfaces, via which the tool parts in the mounted state of the hand lever are mutually pivotable and relative to each other adjustable. By this configuration, an extremely simple storage of the two hand lever is achieved via the tool parts, which allows both a pivoting of the two hand lever with their tool parts as well as a relative adjustability of the tool parts. In the assembled state of the two hand lever, the arcuately extending support surfaces of the tool parts abut each other, so that the two tool parts can be pivoted together due to the arcuate course together with the hand levers against each other. Since the support surfaces touch surface is also at the same time a sliding along a support surface on the other support surface possible, so that the tool parts can be adjusted together with the hand levers at the same time in a simple manner on the support surfaces in the direction of the hand lever. If both tool ends of the tool parts are inserted into a receiving groove of a retaining ring, then one of the tool parts can be displaced relative to the other tool pulling part from the receiving groove substantially in the radial direction to the receiving groove. Thus, this embodiment results in an extremely simple rotatable and adjustable mounting of the two tool parts.

Furthermore, the second tool part can be provided according to claim 3 with a centering. This centering is used for example in a bearing ring of a secured by the circlip in a bore roller bearing, so that the attachment of the hand tool is facilitated in the region of a locking ring to be demounted.

Due to the configuration according to claim 4, the first tool part is received on the second tool part between the centering disk and the guide disk. This facilitates, in particular, the joint application of the hand tool with a pair of tool parts in a receiving groove, since the first tool part is adjustable by this configuration, in particular in a common plane with the second tool part with this second tool part adjustable.

According to claim 5 it can be provided that the second tool part has a vertically upwardly projecting bearing pin and that the first tool part has an upwardly projecting adjusting pin and that an adjusting lever is provided, which in such a manner engageable with the bearing pin and the adjusting pin in that a rotation of the adjusting lever around the bearing pin causes an adjustment of the adjusting pin, whereby the relative adjustment of the one tool part takes place relative to the other tool part.

Due to the configuration according to claim 5, in particular large actuating forces can be exerted on the one tool part. Thereafter, it is provided that the second tool part has a vertically upwardly projecting bearing journal and that the first tool part has an upwardly projecting adjusting pin and that an adjusting lever is provided which can be brought into operative connection with the bearing pin and the adjusting pin such that a Rotation of the actuating lever about the bearing pin causes an adjustment of the adjusting pin, whereby the relative adjustment of a tool part takes place relative to the other tool part. By this configuration, the adjusting lever is rotatably supported on the second (other) tool part on the bearing pin, so that it serves as an abutment. If now the one (first) tool part is brought into an end position upon rotation of the actuating lever from an initial position, this becomes a tool part together with the end section the retaining ring, with which the tool part is in communication, "pulled" under deformation of the retaining ring from the receiving groove. In this case, the other tool part is supported in the groove bottom of the receiving groove. Depending on the travel of the adjusting lever, a plastic deformation of the end portion of the locking ring can be achieved here, so that after removal of the spreading forceps according to the invention, the inwardly bent end of the retaining ring with a conventional pliers is gripped, so that the retaining ring in a simple conventional manner from the Receiving groove and thus can be removed from the bore.

Fig. 1

eine perspektivische Explosionsdarstellung zweier Handhebel eines erfindungsgemäßen Handwerkzeuges mit weiteren Montagebauteilen;

Fig. 2

eine verkürzte, perspektivische Darstellung eines ersten Handhebels aus Fig. 1 mit montiertem Stellzapfen;

Fig. 3

eine verkürzte, perspektivische Darstellung des zweiten Handhebels aus Fig. 1 mit montiertem Stellzapfen sowie montierter Zentrierscheibe;

Fig. 4

die Darstellung aus Fig. 3 des zweiten Handhebels mit zusätzlich montiertem als Führungsscheibe ausgebildeten Führungselement;

Fig. 5

eine perspektivische Darstellung eines Werkzeugteils mit einer zweiten Ausführungsvariante eines Führungselementes;

Fig. 6

eine perspektivische, verkürzte Darstellung der beiden Handhebel aus den Fig. 1 bis 4 in ihrem zusammengesetzten Zustand ihrer beiden Werkzeugteile;

Fig. 7

eine Draufsicht VI aus Fig. 6 der beiden Handhebel im Bereich ihrer Werkzeugteile;

Fig. 8

einen mit den beiden Handhebeln im Bereich der Werkzeugteile in Eingriff bringbaren Stellhebel in perspektivischer Darstellung;

Fig. 9

die Darstellung aus Fig. 6 der beiden Handhebel im Bereich ihrer Werkzeugteile mit aufgesetztem Stellhebel aus Fig. 8;

Fig. 10

eine teilweise perspektivische Schnittdarstellung eines Bauteils im Bereich einer Lagerbohrung mit aufgenommenem Wälzlager sowie einem in eine Aufnahmenut eingesetzten Sicherungsring;

Fig. 11

die beiden Handhebel aus Fig. 6 in ihrem am Sicherungsring aus Fig. 10 angesetzten Zustand;

Fig. 12

eine Draufsicht XI des am Sicherungsring angesetzten Handwerkzeuges aus Fig. 11;

Fig. 13

die Draufsicht aus Fig. 12 mit auf die beiden Werkzeugteile aufgesetztem Stellhebel;

Fig. 14

die Darstellung aus Fig. 13 mit relativ zueinander verstellten Handhebeln;

Fig. 15

eine Draufsicht einer zweiten Variante eines Werkzeuges, bei welchem mittels des Stellhebels wahlweise einer der beiden Endabschnitte des Sicherungsringes oder beide Endabschnitte des Sicherungsringes radial nach innen gebogen werden können.

Reference to the drawing, a possible embodiment of the hand tool according to the invention is explained in more detail below by way of example. It shows:

Fig. 1

an exploded perspective view of two hand lever of a hand tool according to the invention with further mounting components;

Fig. 2

a shortened, perspective view of a first hand lever Fig. 1 with mounted adjusting pin;

Fig. 3

a shortened, perspective view of the second hand lever Fig. 1 with mounted setting pin and mounted centering disc;

Fig. 4

the presentation Fig. 3 the second hand lever with additionally mounted as a guide disc guide member formed;

Fig. 5

a perspective view of a tool part with a second embodiment of a guide element;

Fig. 6

a perspective, shortened view of the two hand lever from the Fig. 1 to 4 in its assembled state of its two tool parts;

Fig. 7

a top view VI Fig. 6 the two hand levers in the area of their tool parts;

Fig. 8

a lever which can be brought into engagement with the two hand levers in the area of the tool parts in a perspective view;

Fig. 9

the presentation Fig. 6 of the two hand lever in the area of their tool parts with attached lever Fig. 8 ;

Fig. 10

a partial perspective sectional view of a component in the region of a bearing bore with a received rolling bearing and a retaining ring inserted into a receiving groove;

Fig. 11

the two hand lever off Fig. 6 in her on the circlip Fig. 10 scheduled state;

Fig. 12

a top view XI of the attached to the circlip hand tool Fig. 11 ;

Fig. 13

the top view Fig. 12 with attached to the two tool parts adjusting lever;

Fig. 14

the presentation Fig. 13 with relatively disguised hand levers;

Fig. 15

a plan view of a second variant of a tool in which by means of the adjusting lever either one of the two end portions of the locking ring or both end portions of the retaining ring can be bent radially inwardly.

Fig. 1 shows a perspective exploded view of a first hand lever 1 and a second hand lever 2 a possible embodiment of a hand tool according to the invention 3. The first hand lever 1 forms for manual operation of the hand tool 3 (rear) handle part 4, which has an approximately bent at right angles connecting portion 5 with an approximately parallel to the handle part 4 extending (front) first tool part 6 is in communication. The illustrated two-fold bent shape of the hand lever 1 is merely exemplary. It can also be provided that the grip part 4 is directly connected to the tool part 6 or that the connecting portion 5 is not inclined at right angles to the grip part 4 and / or the tool part 6. Also, the tool part 6 does not necessarily have to run parallel to the grip part 4. Here it can also be provided, in particular if the connecting section 5 is not provided, that the grip part is arranged, for example, obliquely "upwards" on the "horizontally" running tool part 6. This is ultimately dependent on the specific conditions of use for which the hand tool 3 is provided in an individual case. The same applies to the design of the second hand lever 2.

This first tool part 6 has a receiving bore 7 into which an adjusting pin 8 is fixedly inserted. In this case, the receiving bore 7 is arranged approximately centrally in the first tool part 6. In the outer end region, the first tool part 6 is equipped with a claw-like tool end 9. In the region of this tool end 9, the tool part 6 is formed reduced in its vertical height, so that it can be inserted into a receiving groove of a retaining ring.

The first tool part 6 has the second hand lever 2 towards a slightly arcuate support surface 10, whose function will be explained later in more detail.

Furthermore, it is off Fig. 1 It can be seen that the tool end 9 of this support surface 10 forms an engagement surface 12 running obliquely relative to the longitudinal center axis 11 of the tool part 6.

The second hand lever 2 of the hand tool 3 has a second tool part 15, which in the illustrated embodiment is parallel to a second handle part 16 of the second hand lever 2 and also via a (vertical) connecting portion 17 with the second handle part 16 is fixed in connection. As mentioned above for the first hand lever 1, the second hand lever 2 can also be designed differently. The second tool part 15 also forms a tool end 18, which is also hook-shaped. In the area of this tool end 18, the tool part 15 is also provided with a lower height, so that this is also used in a receiving groove of a retaining ring. In the region of this tool end 18, the tool part 15 also forms an engagement surface 19, which extends obliquely inclined to the longitudinal central axis 20 of the second tool part 15, as can be seen from the drawing.

Furthermore, it is off Fig. 1 a centering disc 25 recognizable, which is fixedly mounted on the underside of the second tool part 15. For fixed connection of the centering disk 25, a mounting pin 26 and a bearing pin 27 are provided in the present embodiment, which are fixed by corresponding mounting holes 28 and 29 of the second tool part 15 pluggable and fixed with corresponding receiving holes 30 and 31 of the centering brought into engagement. For fixed anchoring can be provided here, for example, press connections or any other suitable connection.

Furthermore, in Fig. 1 a guide plate 32 can be seen, which can be mounted on the second tool part 15 on the upper side by means of a mounting screw 33. For this purpose, this tool part 15 has a corresponding threaded bore 34 towards its tool end 18.

The exemplified, angled embodiment of the first hand lever 1 and the second hand lever 2 with the angled extending connecting portions 5 and 17 is provided to bring the two tool parts 6 and 15 with a locking ring in engagement, which in a certain "depth" is inserted in a receiving groove of a bore. Thus, the two connecting portions 5 and 17 may be formed longer or shorter.

Next is out Fig. 1 at least suggestively recognizable that the lateral, the engagement surface 19 opposite support surface 21 of the second tool part 15 has a curved course. Due to the arcuate course of this support surface 21 and the support surface 10, the two hand lever 1 and 2 with their tool parts 6 and 15 side by side in a common plane can be arranged and can be pivoted by pressing the handle parts 4 and 16 relative to each other.

Fig. 2 shows the first hand lever 1 with a shortened grip part 4 in a perspective view of its first tool part 6 with the tool part 6 mounted adjusting pin. 8

Fig. 3 shows the second hand lever 2 with its shortened second handle part 16, the connecting portion 17 and the second tool part 15, wherein also here the second handle part 16 is shown shortened. From Fig. 1 recognizable centering 25 is disposed on the underside of the tool part 15 and the mounting pin 26 and the bearing pin 27 fixedly attached to the second tool part 15. It is off Fig. 3 recognizable that the centering plate 25 protrudes laterally beyond the arcuate support surface 21.

Fig. 4 shows the presentation Fig. 3 the second hand lever 2 with its grip part 16, the vertical connecting portion 17 and the second tool part 15. In the illustration of Fig. 4 the guide plate 32 is attached via the mounting screw 33 on the upper side on the second tool part 15. This guide plate 32 projects beyond the tool part 15 also at least over the arcuate support surface 21 laterally, so that the guide plate 32 forms a kind of guide element.

Since the guide element in the form of the centering 25, as is made Fig. 4 it can be seen, is arranged stationary on the lower side of the second tool part 15 and the guide plate 32 is arranged on the upper side on the second tool part 15, a kind of receiving area 40 is formed between the centering plate 25 and the guide plate 32. In this receiving area 40, the first hand lever 1 with its first tool part 6 can be used, so that the first tool part 6 can be brought with its support surface 10 with the support surface 21 of the second tool part 15 in contact.

Due to the arcuate course of the two support surfaces 10 and 21 thus the two hand lever 1 and 2 and thus the two tool parts 6 and 15 are mutually pivotable.

The guide element shown here by way of example in the form of the guide plate 32 may also have a different outer contour and does not necessarily have to be circular. Also, this does not necessarily have to be screwed to the tool part 15. This shows Fig. 5 by way of example a guide element 35, which is placed on the upper side of the tool part 15. This guide element 35 is plate-like and can be fixedly connected to the tool part 15 by means of a welded or soldered connection or, if designed accordingly, also by means of a screw connection. Also in this embodiment, the centering plate 25 is provided below the tool part 15, which is fixedly mounted on the mounting part 26 and the bearing pin 27 on the tool part 15.

Fig. 6 shows the assembled state of the first hand lever 1 and the second hand lever 2 from the Fig. 2 and 4 , It can be seen that the first tool part 6 is accommodated between the upper guide element designed as a guide disk 32 and the lower centering disk 25 and is in contact with the second tool part 15 below the guide disk 32. Due to this guidance of the first tool part 6 between the guide disk 32 and the centering disk 25, the two tool parts 6 and 15 are arranged in a common plane 22 and can thus be used together in a receiving groove of a retaining ring.

Furthermore, it is off Fig. 6 recognizable that the adjusting pin 8 and the bearing pin 27 project vertically above the associated tool parts 6 and 15.

This assembled state of the two hand lever 1 and 2 with their tool parts 6 and 15 shows Fig. 7 in a plan view VI Fig. 6 , From this top view the Fig. 7 is again recognizable that the two tool parts 6 and 15 with their arcuately extending support surfaces 10 and 21 are in contact. In this case, the first tool part 6 is received pivotably relative to the second tool part 15 between the lower centering disk 25 and the upper guide disk 32. Thus, the two hand lever 1 and 2 on their in Fig. 6 shortened handle parts 4 and 16 in the direction of the two arrows 41 and 42 against each other pivots, move the two tool ends 9 and 18 of the tool part 6 and 15 in the direction of the two arrows 43 and 44 apart, so that the distance between the two engaging surfaces 12 and 19 inevitably increases. Next is out Fig. 7 recognizable that the two tool ends 9 and 18 with their engagement surfaces 12 and 19 are claw-shaped or hook-shaped.

In order to adjust the first hand lever 1 with its first tool part 6 along the support surface 21 of the second tool part 15 relative to the second hand lever 2 with little effort, a lever 50 is provided, which in Fig. 8 can be seen in a perspective view.

The lever 50 off Fig. 8 has a handle 51 on which a plate-shaped adjusting device 52 is arranged. This adjusting device 52 extends substantially parallel to the handle 51 and is fixedly connected thereto via a connecting section 53 extending at right angles to the handle 51 or to the adjusting device 52. Again, it should be noted that this angled configuration of the actuating lever 50 is merely exemplary and that, as described for the two hand levers 1 and 2, other shapes are conceivable. The adjusting device 52 has in the illustrated embodiment in the region of its "free" end 54 a slot-like opening 55, with which the adjusting device 52 with the bearing pin 27 of the second tool part 15 from Fig. 3 adjustable engageable. For connecting portion 53 toward the adjusting device 52 at a distance from its opening 55 on a through hole 56, with which the adjusting device 52 with the out Fig. 2 recognizable adjusting pin 8 of the first tool part 6 can be brought into engagement.

This shows Fig. 9 a perspective view of the hand tool 3 with his first hand lever 1, the second hand lever 2 and the scheduled on the hand tool 3 lever 50 from Fig. 8 , The first hand lever 1 and the second hand lever 2 are shown shortened, so that the associated handle parts 4 and 16 are only partially visible. In the same way, the adjusting lever 50 is shown shortened, so that the handle 51 is also only partially visible.

How out Fig. 9 it can be seen, the two hand lever 1 and 2 are joined together, as is made Fig. 4 and the associated description. The adjusting lever 50 is attached with its adjusting device 52 on the hand tool 3 and is in the illustrated engagement position on the upper side on the two tool parts 6 and 15 and on the guide plate 32 on. In this case, the adjusting device 52 is with its opening 55 with the vertically upwardly projecting bearing pin 27 of the second tool part 15 in engagement. The through hole 56 of the adjusting device 52 is attached to the likewise vertically upwardly projecting adjusting pin 8 of the first tool part 6. By operating (rotation) of the actuating lever 50 in the direction of arrow 60, the adjusting lever 50 is adjusted about the bearing pin 27 in the direction of arrow 60, so that the adjusting pin 8 is also adjusted due to its engagement with the through hole 56 of the actuating lever 50. Since in this rotating adjusting movement and the associated adjusting movement of the first tool part 6 relative to the second tool part 15 in the direction of the arrow 61, the distance of the adjusting pin 8 to the bearing pin 27 changes, the adjusting device 52 slides during this adjusting movement with its slot-like opening 55 along the journal 27th

Since the adjusting pin 8 is fixedly engaged with the first tool part 6, thus the entire first hand lever 1 moves with its tool part 6 substantially in the direction of the arrow 61, so that the front tool end 9 of the first tool part is also adjusted in this direction relative to the front tool end 18 of the second tool part 15.

By this additional adjustment of the first tool part 6 relative to the second tool part 15 in the direction of the arrow 61, a standing with the front end of the tool 9 engaged end portion of a retaining ring securely out of the receiving groove, in which this is used, are bent out.

This shows Fig. 10 schematically a perspective partial section of a component 65, which has a stepped bearing bore 66. This bearing bore 66 may have a plurality of conical, axially spaced portions 67 and 68, between which a cylindrical portion 69 is located. These axially successive sections 67, 69 and 68 serve to facilitate the mounting of a retaining ring 70, which in Fig. 10 already inserted in a circumferential receiving groove 71.

How out Fig. 10 is apparent, the retaining ring 70 is formed "slotted" and has two circumferentially spaced end portions 72 and 73 on. The end faces 74 and 75 of these end portions 72 and 73 can thereby be obliquely inclined to one of these penetrating radials 76 and 77 extending, as exemplified by DE 10 2012 016 491 is described for the described there round wire fuse ring.

The locking ring 70 is located in the in Fig. 10 shown fully assembled position in the groove bottom 78 of the receiving groove 71, so that it can not be engaged behind in its peripheral region by means of a tool, so that it can not be compressed for disassembly from the receiving groove 71. To order now this locking ring 70 from the To be able to dismantle receiving groove 71, the hand tool 3 according to the invention is provided.

Furthermore, it is off Fig. 10 Still recognizable that in the bearing bore 66 in a radially tapered cylindrical bore portion 79, for example, a roller bearing 80 is suitably inserted, which is axially secured by the retaining ring 70. This rolling bearing 80 has, in particular, an inner bearing ring 81, which, for example, has a correspondingly corresponding through bore 82 for the rotatable mounting of a shaft.

How out Fig. 11 it can be seen, the hand tool 3 with the radially outer tool ends 9 and 18 of its tool parts 6 and 15 between the two end portions 72 and 73 of the locking ring 70 can be used. It is too Fig. 8 illustrated lever 50 is not placed on the two tool parts 6 and 15 and their adjusting pin 8 and bearing pin 27. To secure the position, in particular of the second hand lever 2 with its tool part 15, in particular on the inner bearing ring 81 of the rolling bearing 80, the centering plate 25 is provided, which from Fig. 11 suggestively recognizable and accordingly in this position Fig. 11 in the inner bearing ring 81 and in the Fig. 9 apparent through hole 82 of the bearing ring 81 is inserted.

Fig. 12 shows a top view XI Fig. 10 , from which it can be seen how the two front tool ends 9 and 18 between the two end portions 72 and 73 of the locking ring 70 are arranged. Since the two hand levers 1 and 2 with their grips 4 and 16 are in an "open" angular position, the two engagement surfaces 12 and 19 of the two tool parts 6 and 15 at a distance from each other, which is smaller than the distance between the two end faces 74 and 75 of the end portions 72 and 73 of the locking ring 70th

Now, if the two handle parts 4 and 16 of the two hand lever 1 and 2 in the direction of the two arrows 41 and 42 pivoted against each other, so the distance between the engaging surfaces 12 and 19 of the two front tool ends 9 and 18, to both engagement surfaces 12 and 19 increases the end faces 74 and 75 of the end portions 72 and 73 of the retaining ring 70 abut. The too Fig. 1 described angular positions of the two engaging surfaces 12 and 19 to the corresponding longitudinal axes 11 and 20 of the two tool parts 6 and 15 is chosen so that their engagement surfaces 12 and 19 at least approximately flat with the end surfaces 74 and 75 of the end portions 72 and 73 of the locking ring 70th come to the plant. Due to the obliquely inclined course engage the engagement surfaces 12 and 19, the respective associated end face 74 and 75 of the respective end portion 72 and 73 of the locking ring 70 radially outwardly.

This engagement position is an example of the plan view Fig. 13 removable. Furthermore is Fig. 12 and Fig. 13 also removed that the tool part 15 is inserted with its centering 25 in the inner bearing ring 81 of the bearing 80 suitable. Out Fig. 13 Furthermore, the groove bottom 78 can be seen in dashed lines, on which the two tool ends 9 and 18 rest radially in this initial state.

After the two hand lever 1 and 2 with their tool parts 6 and 15 from the in Fig. 12 shown position in the engaged position Fig. 13 were adjusted, the adjusting lever 50 is placed with its adjusting device 52 on the adjusting pin 8 and the bearing pin 27, as this Fig. 9 described has been. This mounted initial state is in the plan view of Fig. 13 also recognizable.

Out Fig. 13 It can be seen here that the adjusting device 52 is in engagement with its slot-like opening 55 with the bearing pin 27. The through hole 56 of the adjusting device 52 is in turn connected to the adjusting pin 8 of the first tool part 6 in engagement. Now is the lever 50 on his in Fig. 13 shown shortened handle 51 in the direction of the arrow 60 moves, accordingly, the adjusting pin 8 moves substantially in the direction of arrow 61, whereby a relative adjusting movement of the hand lever 1 relative to the hand lever 2 with its tool part 6 relative to the tool part 15th is effected. During this adjusting movement of the actuating lever 50 in the direction of the arrow 60, a hand force in the direction of arrows 41 and 42 is still exerted on the two hand lever in the region of their handle parts 4 and 16, so that the contact between the Fig. 12 apparent engagement surfaces 12, 19 of the tool ends and the end faces 74, 75 of the end portions 72, 73 of the retaining ring 70 remains.

Accordingly, the front tool end 9 of the first tool part 6 moves relative to the front tool end 18 of the second tool part 15 in the direction of arrow 61. The front end of the tool 18 of the second tool part 15 is supported in the groove bottom 78 (shown in phantom) of Fig. 12 for clarity, not shown receiving groove 71 from Fig. 10 radially off. Since the tool end 9 is in operative connection with its engagement surface 12 with the end section 73 of the securing ring 70, this end section 73 is also bent in the direction of the arrow 61 substantially radially out of the receiving groove. In this case, the complete deflection of this end portion 73 from the receiving groove of the lever 50 from the in Fig. 13 shown Starting position in the in Fig. 14 illustrated end position adjusted about the bearing pin 27.

From the Fig. 12 and Fig. 13 Furthermore, it can be seen that in the attached to the locking ring 70 state of the hand tool 3, the two tool parts 6 and 15 with their arcuately extending support surfaces 10 and 21 to each other, so that about these support surfaces 10 and 21, a kind of articulated connection between the two hand levers 1 and 2 in the region of its two tool parts 6 and 15 consists.

Out Fig. 14 It can be seen that the hand lever 1 has been adjusted relative to the hand lever 2 by the adjusting movement of the actuating lever 50 in the direction of the arrow 60 in the direction of the arrow 61. Due to the engagement of the tool end 9 with its engagement surface 12 with the end portion 73 of the locking ring 70, this end portion 73, as it turns out Fig. 14 is visible, bent radially inwardly, in which case a plastic deformation of the retaining ring 70 takes place.

If this end portion 73 is bent in this radially inwardly projecting position, the hand tool 3 according to the invention can be removed again from the engaged position. Thus, the inwardly bent end portion 73 of the locking ring 70 is freely accessible, so that the locking ring 70 can be removed by means of a conventional pliers by gripping this end portion 72 of the receiving groove.

In a further embodiment, it may also be provided that only or to the end portion 72 and the end portion 73 of the locking ring 70 from the receiving groove 71 from Fig. 10 is bent. For this purpose, it is "only" required to adjust the second hand lever 2 in the direction of the arrow 61. In order to have better leverage ratios, the mounting pin 26 and the bearing pin 27 are made Fig. 3 reversed.

This shows Fig. 15 a variant in which either the first hand lever 1 or the second hand lever 2 in the direction of the arrow 61 by the adjusting lever 50 is adjustable. In Fig. 15 For this purpose, the same reference numerals are entered, as in Fig. 14 so the related description too Fig. 15 can be read, as far as the functional relationships are identical.

How out Fig. 15 it can be seen, mounting pin 26 and the bearing pin 27 are reversed, so that the mounting pin 26 in the off Fig. 1 apparent mounting hole 28 and the bearing pin 27 in the off Fig. 1 apparent mounting hole 29 is inserted. If the guide disk 32 is used as the guide element, then it has an opening 36. Since the bearing pin 27 in the mounted state, the tool part 15 projects beyond "up", this breakthrough 36 is provided in the guide plate 32, as shown in the plan view of Fig. 15 is recognizable. As mentioned above, the guide element can also have a completely different shape, so that the opening 36 can also be omitted.

Since the bearing pin 27 bi of the embodiment according to Fig. 15 "closer" to the tool end 18 is arranged out, the patch with its adjusting device 52 on the bearing pin 27 and the adjusting pin 8 lever 50 relative to the two hand levers 1 and 2 in his in Fig. 15 shown "neutral" starting position on a different angular position than in the embodiment according to Fig. 13 ,

It is thereby achieved that the adjusting lever 50 can be adjusted in rotation in the direction of the arrow 60 as well as in the opposite direction in the direction of arrow 62 about the bearing pin 27 from this starting position, without this colliding with one of the hand lever 1 or 2.

If the adjusting lever 50 is adjusted in the direction of the arrow 60, the hand lever 1 is moved together with its tool part 6 in the direction of arrow 61, as to the Fig. 13 and 14 for the first embodiment is described.

If the lever 50 from his in Fig. 15 On the other hand, the initial position shown rotates in the direction of the arrow 62, the second hand lever 2 is adjusted with its tool part 15 in the direction of the arrow 61, while the first hand lever 1 is supported with its tool part 6 in the groove bottom 78. With this adjusting movement we thus bent the end portion 72 of the locking ring 70 due to the positive engagement with the tool end 18 of the second tool part 15 radially inwardly from the receiving groove. The end portion 72 of the locking ring 70 thus passes in an approximately radially to the receiving groove 71 Fig. 9 running end position, like this too Fig. 14 for the end portion 73 has been described.

Thus, with the second embodiment, one of the two end portions 72 or 73 or both end portions 72 and 73 can be bent radially inward as needed. If both end portions 72 and 73 are bent inward successively, the subsequent disassembly of the locking ring 70 is further simplified, since these radially inwardly bent end portions 72 and 73 can be detected with a "conventional" pliers. With such a pair of pliers, the circumferential distance of the two inwardly bent end portions 72, 73 of the retaining ring 70 can be easily reduced, so that accordingly also reduces the diameter of the locking ring 70 and this are thus taken out of the receiving groove 71 axially out in a simple and secure manner can.

Claims (5)

Hand tool designed in the manner of a spreading forceps (3) with a first hand lever (1) having a first handle part (4) and a first tool part (6) and a second hand lever (16) and a second tool part (15) (2), which are pivotable relative to each other, wherein the tool ends (9, 18) of the tool parts (6, 15) in a common plane (22) are arranged and in a receiving groove (71) a bore (66) of a component (65 ) are insertable such that the tool ends (6, 15) with circumferentially spaced end portions (72, 73) of a retaining ring (70) seated in the receiving groove (71) by operating the handle parts (4, 16) of the hand lever (1, 2) can be brought into engagement,
characterized,
in that one of the tool parts (6, 15) is adjustable relative to the other tool part (15, 6) relative to the receiving groove (71) in such a way that the end section (73, 72) of the securing ring (73, 72) engaging with this tool part (6, 15) 70) is bent out of the receiving groove (71). Hand tool according to claim 1, characterized in that the tool parts (6, 15) facing each other, arcuately extending, lateral support surfaces (10, 21), via which the tool parts (6, 15) in the mounted state the hand lever (1, 2) are mutually pivotable and adjustable relative to each other. Hand tool according to claim 1 or 2, characterized in that the second tool part (15) is provided on the underside to the bore (66) with a centering disc (25). Hand tool according to claim 3, characterized in that the second tool part (15) on its side facing away from the bore (66) side, on the upper side a guide element (32) and,
in that the first tool part (6) is pivotably and adjustably receivable between the guide element (32) and the centering disk (25). Hand tool according to one of claims 1 to 4, characterized in that the second tool part (15) has a vertically upwardly projecting bearing pin (27) and that the first tool part (6) has an upwardly projecting setting pin (8) and,
in that an adjusting lever (50) is provided, which can be brought into operative connection with the bearing pin (27) and the adjusting pin (8) such that a rotation of the adjusting lever (50) about the bearing pin (27) causes an adjustment of the adjusting pin (8) whereby the relative adjustment of the one tool part (6 or 15) takes place relative to the other tool part (15 or 6).

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