WO2019223992A1

WO2019223992A1 - Ratchet wrench

Info

Publication number: WO2019223992A1
Application number: PCT/EP2019/061610
Authority: WO
Inventors: Gerhard Bachthaler
Original assignee: Gerhard Bachthaler
Priority date: 2018-05-22
Filing date: 2019-05-07
Publication date: 2019-11-28
Also published as: DE102018112183B3

Abstract

A ratchet wrench (10) is provided, comprising a housing (12), at the first end of which a circle-segment-shaped recess (14) is provided in which a rotational insert is rotatably held, which insert has a circle-segment-shaped guide part (18) having a mouth-like opening (20) and has two claw elements (22, 23), which are retained pivotably with respect to each other on opposite sides of the guide part (18) and two outer ends (32, 34) of which lie against each other in a closed position and surround a hexagonal hole in the shape of a screw (26) together with the guide part, wherein the two claw elements (22, 23) can be pivoted, with the outer ends (32, 34) thereof, outward from an initial position into an open position so that the ratchet wrench (10) can be placed onto and pressed against a screw (26) in such a way that, during the pressing, the screw (26) is guided into the mouth-like opening (20) of the guide part (18) and hits rear control surfaces (36, 38) of the claw elements (22, 23) in order to pivot the claw elements into a closed position in which the screw (26) is surrounded by the claw elements (22, 23) and the guide part (18) and the rotational insert can be rotated within the recess (14), and wherein the guide part (18) and the two claw elements (22, 23) have, on the outer periphery thereof, a peripherally extending set of external teeth (29), which set of external teeth cooperates with a ratchet part in order to allow the screw (26) to be tightened in a first ratchet position and to allow the screw (26) to be loosened in a second ratchet position.

Description

ratchet wrench

The invention relates to a ratchet wrench for loosening and tightening of

Fittings, which can also be used in pipe fittings. With ratchet-ring spanners can be used even in cramped mounting conditions with a small movement without repeated repositioning. However, ratchet wrenches that completely surround the screw in a ring shape can not be used with pipe fittings because it is not possible to place the ring on the screw connection.

In one known from DE 195 31 533 C1 ratchet wrench is a

Polygonal receiving opening provided for receiving a screw head, with at least one pawl element on the handle side for engaging holding in one direction of rotation and ratcheting sliding past in the other direction of rotation. On the handle side of the inner polygon edge is a substantially U-shaped recess provided, in which the at least one pawl element is arranged, which extends into the periphery of the receiving opening and substantially in the same way as the multi-edged teeth. The pawl element is supported in the retaining rotational direction on the side wall of the U-recess, while it pivots in the ratchet rotational direction in the U-recess against spring force.

Although the ratchet-ring spanner in question makes it possible, in principle

Execution as a mouthwrench, also to be placed outside on a pipe fitting. However, the holder of the screw head in this embodiment is only incomplete, and the necessary pawl elements are subject to wear and not always provide reliable support.

Against this background, the invention has the object, a

Ratchet wrench, which can be used as a ratchet ring spanner and can also be used in pipe fittings.

This object is achieved by a ratchet wrench with a housing, at the first end a preferably circular portion-shaped recess is provided, in which a rotary insert is rotatably received, which has a guide member with a mouth-shaped opening, and two opposite sides of Guide member mutually pivotally held jaw members, wherein the two jaw members abut each other in a closed position with two outer ends and enclose together with the guide member a helical, in particular hexagonal, recess in the form of a screw, the two jaw members with their outer ends from a starting position in an open position are pivotable outwards, so that the ratchet wrench can be attached to a screw and pressed in such a way that the screw is guided when pressed into the mouth-shaped opening of the guide member and at abuts the rearward control surfaces of the jaw members to pivot the jaw members into a closed position in which the screw is enclosed by the jaw members and in the guide member and the turning insert is rotatable within the recess, and wherein the guide member and the two jaw members at their Outer circumference have a circumferential outer toothing, which cooperates with a ratchet part to a first ratchet position to allow a tightening of the screw and preferably in a second ratchet position, a loosening of the screw.

According to the invention allows the turning insert with the pivotally held

Claw elements, when they are pivoted outwards, attach and press the ratchet wrench like a spanner from the outside to a screw, whereby the screw is guided when pressed into the mouth-shaped opening of the guide member. As soon as the screw strikes against the rearward control surfaces of the jaw elements, they are pivoted into the closed position on further pressing against the screw, in which the screw is then completely enclosed by the jaw elements and the guide part and the turning insert can be rotated within the recess ,

The ratchet wrench can now with the peripheral outer toothing on

Guide member and be used in both jaw members in conjunction with a ratchet member to allow in the first ratchet position, a tightening of the screw and preferably in a second ratchet position, a loosening of the screw.

The ratchet wrench according to the invention combines the advantages of an open-end wrench with a ring ratchet wrench. The construction of the two jaw elements, which pivot automatically from an open position when pressed against a screw, so that a complete closed position on the screw is achieved, there is a reliable way to use the ratchet wrench even with pipe fittings , Since the screw is enclosed in the closed position of the guide part on the one hand and the jaw elements on the other hand, a reliable power transmission is guaranteed as a ring spanner. The guide part practically provides an open-end wrench, which is supplemented by the two claw elements to form a ring spanner. Furthermore, the ratchet wrench according to the invention replaces a ring ratchet, since in the closed position it is completely closed around a screw like a ring ratchet. According to a further embodiment of the invention, the jaw elements in

In the region of its outer ends, guide lugs which cooperate with the recess of the guide part in order to ensure guidance of the jaw elements in the recess when the turning insert rotates within the recess.

In this way, a clean guidance of the two jaw elements is ensured when rotated in the recess and avoiding falling out or blocking by the jaw elements in each case.

According to a further embodiment of the invention, the ratchet part

Control member having a first portion and a second portion, each having an outer toothing, wherein the control member is pivotable by means of an adjusting element between the first and second ratchet position and is biased against the outer teeth of the jaw members and the guide member and cooperates with this, to tighten and to allow loosening of the screw in the first and second ratchet position, respectively.

In this way, with a typical, basically known in the art

Ratchet part tightening and loosening of the screw in the first and second Ratch rule be reached.

The actuator is in this case preferably held with a housing

Spring element, preferably via a ball, biased against the turning insert.

In this way, the ratchet function is ensured in a simple manner.

According to a further embodiment of the invention, the external toothing on

Guide member and arranged on the jaw members in a first and a second, parallel to parallel plane, wherein the control surfaces of the jaw members are arranged centrally between the two planes, and wherein the outer toothing of the ratchet member is arranged in associated first and second planes. Although in principle a construction in only one plane would also be possible, the construction of the external toothing in two mutually parallel planes ensures a better concentricity and tilting moments due to a one-sided arrangement of, for example, the control surfaces of the claw elements are avoided. Overall, a significantly increased reliability is ensured in this way.

In an additional embodiment of this embodiment is a transition in the

External teeth between the guide member and the jaw members in the first and second planes angularly offset relative to each other.

For inaccuracies in the transition area of the external teeth between

Guide part and jaw members or assembly tolerances, a significantly increased reliability is ensured by a small angular offset between the first and second level at the transition in the outer toothing between the guide member and the jaw members.

According to a further embodiment of the invention is a belt drive with a

Output pinion provided with an external toothing, which is movable by means of an actuating element in a meshing with the external toothing of the rotary insert drive position.

This makes it possible, in place of a ratchet operation directly by hand on the

Belt drive to perform a tightening or loosening the screw. If the screw is very loose on the thread so that there is insufficient friction to hold the screw in place when turning it back, the screw can be moved via the belt drive in this way.

Furthermore, in a further development of this embodiment, the belt drive a

Have drive pinion having a connection for connection to a motor drive. So it can, for example. A drill can be used to the belt drive for

To tighten or loosen the screw connection.

According to a further embodiment of the invention, the output pinion on

Control member of the ratchet member between the first portion and the second portion held rotatably and pivotally together with the control between a central position for driving the rotary unit and the first and second ratchet position for tightening or loosening the screw.

In this way, the ratchet part for tightening or loosening the screw

can be advantageously combined with the belt drive.

According to a further embodiment of the invention, an adjusting element is provided which cooperates with the guide part in such a way that, in a reverse rotational position, rotation of the turning insert into the starting position is possible, in which the jaw elements pivot into the open position and are pulled off of the ratchet wrench is made possible by the screw.

In this way, a reliable way is provided to the

Ratchet wrench from a closed position in which the turning insert is completely closed by a screw back to turn back to the starting position, so that a removal of the ratchet wrench is made possible by the screw.

According to a further embodiment of the invention, the actuating element for the

Ratchet part, for the drive position for driving the rotary insert and for the reverse rotational position for reverse rotation of the rotary insert in the starting position, a common actuator is held on the housing in the longitudinal direction between three positions displaceable, wherein in a first position of the actuating element the ratchet part between the first and second ratchet position is pivotable, in a second position adjoining the ratchet part is fixed in a central position on the housing, in which the output pinion meshes with the outer toothing of the rotary insert, and in a subsequent third position in a central position at the housing se is fixed so that the output pinion with the external teeth of the turning insert

meshes and the actuator cooperates with a stop on the guide member to stop the turning insert during further rotation in the starting position.

By the various adjusting elements for adjusting the ratchet part, to drive the rotary insert and to adjust the reverse rotational position for the reverse rotation of the rotary insert are realized in the starting position by a common actuator, results in a much simplified design.

In a preferred development of this embodiment, the common control element has a guide block pivotably held on the housing on a pivot axis, in which a slide is held longitudinally displaceable, wherein the slide in the first position together with the ratchet part between the first and second ratchet position is pivotable, wherein the slider is held in the second position between guide elements in a central position such that a driven pinion of the belt drive meshes with the outer toothing of the rotary insert, and wherein the slide in the third position relative to the second position additionally in the direction is moved to the turntable to cooperate with the stop so that the turntable is stopped when turning as soon as the starting position is reached.

Such a combination with the ratchet part and the belt drive enables a particularly simple interaction in order to guarantee the three desired functions.

In an additional development of this embodiment, the control of the ratchet member is pivotally held together with the guide block on the pivot axis and the output pinion rotatably supported on a rotation axis of the control element, which extends through the pivotable end of the guide block.

In this way, a simple structure. According to a further embodiment of the invention, the turning insert is received replaceable on the housing.

For this purpose, at the top of the housing on both sides of the rotary insert, for example. Two

Hinges are provided, which allow a folding of the housing and a replacement of the rotary insert against a rotary insert for a different screw size.

According to a further embodiment of the invention can for the return of the

Turning unit in the starting position, in which a withdrawal from the screw is made possible, a mechanism can be provided, which is stretched as by tensioning a spring and then allows automatic return to the open position. For this purpose, for example, a sliding lever can be displaceably arranged on the housing, which is displaced by hand, wherein a spring is tensioned. As soon as the common Stellele ment is pushed into the third position, a detent of the spring releases and the turning insert moves to the stop, so that then automatically the starting position is reached.

It is understood that the above and the still to follow

explanatory features of the invention not only in the particular combination, but also in other combinations or alone, without departing from the scope of the present invention.

Further features and advantages of the invention will become apparent from the following

Description of a preferred embodiment with reference to the drawings. Show it:

1 shows a first perspective view of a ratchet wrench according to the invention in a closed position in which a screw is enclosed;

2 shows a view of the ratchet wrench according to FIG. 1, but in an open position in which the two jaw elements are pivoted outwards, so that the ratchet wrench can be pushed onto a screw head directly from the outside;

Fig. 3 is an illustration of the ratchet wrench of FIG. 1, but with a

rotated relative to the starting position shown in Figure 1 rotating insert.

4 shows an illustration of the ratchet wrench according to FIG. 1, but after removal of the upper housing part;

5 shows a longitudinal section through the ratchet wrench according to FIG. 4;

FIG. 6 shows a plan view of the ratchet wrench according to FIG. 5, the starting position having been reached, from which the two jaw elements can be pivoted outwards in order to reach the open position, wherein the common control element in the third Position is;

Figure 7 shows the ratchet wrench of Figure 6, but with the common Stellele element in the second position, in which a drive of the turning insert over the belt drive is enabled.

Fig. 8 the ratchet wrench of FIG. 7, but after removal of the upper

Housing part;

9 is a perspective view of the ratchet wrench according to FIG 8 with an additional detail magnification of the dot-dashed section.

Fig. 10 is another perspective view of the ratchet wrench, but with the common actuator in a first ratcheting position;

Fig. 1 1 is a plan view of the ratchet wrench of FIG. 10; Fig. 12 the ratchet wrench of FIG. 11, but after removal of the upper

Housing part;

FIG. 13 shows the ratchet wrench according to FIG. 11, but with the common control element in the second ratchet position and FIG

14 shows the ratchet wrench according to FIG. 13, but after removal of the upper one

Housing part.

In Fig. 1, an inventive ratchet wrench is shown in perspective and generally designated by the numeral 10. The ratchet wrench 10 has an elongate housing 12, with an open-end wrench 31 at one end and a turning insert 16 at the other end. The turning insert 16 is rotatably held in a circular portion-shaped recess 14. The turning insert 16 has a guide part 18 with a circular section shape, which is rotatably received in the recess 14. The guide part 18 has a mouth-shaped opening 20 in the manner of an open-end wrench. Furthermore, two claw elements 22, 23 are pivotally received on the guide part 18, as will be explained in more detail below. The guide member 18 and the claw members 22, 23 received thereon are surrounded according to FIG. 1 by a common outer toothing 29, which forms a continuous toothing over the entire outer circumference.

In the case shown, a hexagonal screw 26 is within the of the

mouth-shaped opening 20 of the guide member 18 and the associated jaw members 22, 23 enclosed hexagonal opening 30 is held.

To operate the ratchet wrench 10 is a common actuator 28 at the

Top of the housing 12 is provided, which is also explained in more detail below. The two jaw elements 22, 23 are pivotably held on opposite sides of the guide part 18 on pivot axes 37, 39. In the illustration according to FIG. 1, the two jaw elements 22, 23 are in an initial position, in which the two jaw elements 22, 23 are indeed pivoted in, so that the head of the Screw 26 is completely enclosed, in which, however, a pivoting of the two jaw members 22, 23 is made possible to the outside in an open position, as shown in Fig. 2.

In the open position shown in FIG. 2, the two jaw members 22, 23 are so around the

Swivel axes 37, 39 swung outwardly that 26 in this position, a screw 26 can be moved laterally into the mouth-shaped opening 20. The two claw elements 22, 23 have, at their side remote from the outer ends 32, 34, backward control surfaces 36, 38 which, in the open position shown, protrude into the rear area of the mouth-shaped opening 20 of the guide part 18.

Now, if the ratchet wrench 10 is moved in the direction of a screw 26, the head of the screw 26 passes through the opening formed between the two jaw members 22, 23 in the mouth-shaped opening 20 and is on both sides of the two opposite head surfaces 40, 41 guided at the edge of the mouth-shaped opening 20. If the ratchet wrench 10 is moved further in the direction of the screw 26, then finally reach the front head surfaces 42, 43 of the screw 26, which faces the control surfaces 36, 38, to the control surfaces 36, 38. As a result, the jaw members 22, 23 to pivots the pivot axes 37, 39 until finally the end of the mouth-shaped opening 20 is reached and the jaw members 22, 23 have completely closed around the screw, so that the starting position shown in FIG. 1 is reached.

In order to ensure at a later rotation of the turning insert 16 that the

Claw elements 22, 23 are guided within the circular portion-shaped recess 14 and can not open to the outside, a guide nose 33, 35 is arranged on each jaw member 22, 23 respectively. The guide lugs 33, 35 protrude from the surface of the jaw elements 22, 23, so that a guide is ensured within the circular section-shaped recess 14 during rotation. On the undetectable in Fig. 1 and 2 underside of the ratchet wrench 10 corresponding guide tabs are provided on the jaw members 22, 23. Starting from the closed position shown in FIG. 1, the turning insert 16 can be rotated to tighten or loosen the screw 26.

In Fig. 1, the starting position is shown, in which the adjusting element 28 with a front

Section 45 of its slider 75 protrudes to the turning insert 16 and abuts against a stop 80 of the guide member 18. In this way, the starting position defi ned.

In FIG. 3, the slider 75 of the adjusting element 28 has been moved back with its front portion 45 so that it is held between two guide elements 76, 77 which are opposite one another and no longer projects toward the turning insert 16. Thus, the turning insert can be rotated in this position without being blocked by the stopper 80. Fig. 3 shows the turning insert in such a rotated position.

3 and 4, the common outer toothing of the guide part 18 and the associated jaw elements 22, 23, which is denoted by 29, consists of two gearings in a first plane 24 and in a second, parallel, spaced plane 25 Between the two levels 24, 25, the control surfaces 36, 38 of the jaw members 22, 23 are arranged.

Since two mutually parallel toothing planes are provided, a

ensures particularly good stability and a symmetrical design.

In Fig. 3 is a toothed transition between the jaw member 23 and the

Guide member 18 by way of example at the first level 24 denoted by 81 and designated at 82 on the second level 25. The two transitions 81, 82 are angularly offset from one another by a small amount. This results in each case an improved leadership, and tolerances can be better absorbed. Furthermore, a more stable toothing and a better engagement with the external teeth 52 of the control element 48 according to FIG. 9 and the external toothing of the output pinion 66 are thereby ensured as well. Fig. 4 shows the ratchet wrench according to Fig. 3, but after removal of the upper

Housing part. It can be seen the essential parts which are held on the lower housing part 44. The control part 28 is in the middle position shown in Fig. 3, in which a rotation of the rotary insert 16 is made possible.

In Fig. 4 is also a with the external teeth 29 of the rotary insert 16th

cooperating ratchet member 46 recognizable. The ratchet part 46 has an approximately heart-shaped control element 48 which is pivotably mounted on the housing 12 on a pivot axis 60. The control element 48 has a first portion 49 on one side and an opposite second portion 50 on the other side, which constitute the two opposite outer sides of the heart-shaped or triangular-shaped control element 48. These two sections 49, 50 are formed curved on the side facing the turning insert 16 and provided with an external toothing 52.

If the control element 48 is pivoted to the right or left into a ratchet position from the middle position shown in FIG. 4, then the respective external toothing 52 of the first section 49 or of the second section 50 engages with the external toothing 29 of the rotary insert 16 and can then perform a ratchet function. In the middle between the two sections 49, 50, an output gear 66 of a belt drive 64 is rotatably supported about a rotation axis 62. In the mid-position shown in FIG. 4, an outer toothing 68 of the driven pinion 66 meshes with the outer toothing 29 of the rotary insert 16.

The output pinion 66 is also in two mutually parallel toothing planes

split, which mesh with the respective toothing planes of the turning insert 16.

The control element 48 of the ratchet part 46 is connected by a spring element 54 via a

Ball 56 biased toward the turning insert 16. The belt drive 64 has at its other end a drive pinion 65, on which an upwardly projecting connection 71 for flanging a motor drive, for example in the form of a drilling machine, is provided. Further, a handwheel 70 is coupled to the drive sprocket 65, so that the belt drive 64 by moving the hand wheel 70 by the hand of

can be moved outside. At the ball 56 facing the end of the control element 48 two recesses 57, 58 are provided, in which the ball 56 can engage.

5 shows a longitudinal section through the ratchet wrench according to FIG. 4. In this case, it can additionally be seen how the spring element 54 is supported in a housing recess 72.

Fig. 6 shows the ratchet wrench according to Fig. 4 and 5 from above.

The structure of the control element 28 is apparent from this. The actuator 28 has a guide block 74, in which the slider 75 is guided longitudinally displaceable. The guide block 74 is pivotably mounted together with the control element 48 of the ratchet part 46 on the pivot axis 60. By the guide block 74 further extends the axis of rotation 62, which is guided by the control element 48 and on which the output pinion 66 is held. Within an opening of the guide block 74, the slider 75 is guided longitudinally displaceable, which can take three different longitudinal positions. In Fig. 6, the third position is shown, in which the front portion 45 of the slider 75 protrudes outwardly in the direction of the rotary insert 16 and is held between two opposing guide members 76, 77 on the housing 12 in a central position. The front portion 45 protrudes in this position to beyond the circular portion-shaped recess 14 addition to the turning insert 16, so that in this position, the stop 80 abuts the front portion 45 and thus the starting position is reached.

The slider 75 has at its front portion a longitudinal groove 47, in which the

Rotary axis 62 is guided. The axis of rotation 62 also cooperates with a curved guide backdrop 79 on the housing 12. In a first position of the adjusting element 28, in which the slider 75 is retracted so far from the turning insert 16, that the front portion 45 is no longer held between the two guide members 76, 77, the guide block 74 with the rotation axis 62 to the right or left along the Guide slot 79 move and then assumes a ratchet position, as will be described below.

In the figures 7 and 8, the ratchet wrench 10 is shown, wherein the

Actuator 28 is in its second position, in which the front portion 45 of the slider 75 is retracted from the rotary insert 16, but is held between the two guide members 76, 77. The rotating insert 16 can thus be rotated while the guide block 74 is held in the center position. In this position, the output pinion 66 meshes with its outer toothing 68 with the outer toothing 29 of the turning insert 16. Thus, the turning insert 16 can be moved in this position with the aid of the belt drive 64.

In Fig. 9, this position is additionally illustrated.

In the figures 10 to 12 of the ratchet wrench 10 in the first position of

Stellelementes 28 shown. Here, the slider 75 is retracted so far from the turning insert 16, so that the front portion of the two guide members 76, 77 is released and thus the guide block 74 can be moved to the right in the first ratchet position. As can be seen from the illustration in FIG. 12, the driven-off tooth 66 is sufficiently far away from the turning insert 16 in this position, so that there is no longer any engagement with the external toothing 29 of the turning insert. In this position, the second section 50 of the control element 48 of the ratchet part 46 meshes with its external teeth 52 with the associated external toothing 29 of the rotary insert 16. In this position, a ratchet operation is made possible.

The screw 26 can thus in a first direction with the ratchet function

be attracted.

If, however, the actuator 28 is pivoted in the other direction, so that the

As shown in FIG. 13 and 14 results, the external teeth 52 of the first portion 49 of the control element 48 cooperates with the external toothing 29, so that a ratchet operation in the opposite direction is made possible. After completion of the screwing the ratchet wrench 10 is laterally

pushed away and can then be moved back to the initial position shown in FIG. 1 with the actuator 28 in its third position, in which the center position shown in FIG. 1 to 3, to allow removal of the ratchet wrench 10. If the space for lateral displacement is not sufficient, the starting position can be achieved by a ratchet with switching between ratchets in one direction and the other direction.

Claims

claims

1. Ratchet wrench with a housing (12), at the first end of which a preferably circular section-shaped recess (14) is provided, in which a rotary insert (16) is rotatably received, which has a guide part (18) with a mouth-shaped opening (14). 20), as well as two on opposite sides of the guide part (18) to each other pivotally held Klauenele- elements (22, 23), wherein the two jaw members (22, 23) in a closed position with two outer ends (32, 34) abut each other and together with the guide part (18) enclose a helical, in particular hexagonal, recess (30) in the form of a screw (26), wherein the two jaw elements (22, 23) with their outer ends (32, 34) consist of a Starting position in an open position are pivoted outwardly, so that the ratchet wrench (10) to a screw (26) can be placed and pressed in such a way that the screw (26) when pressed into the maulf örmige opening (20) of the guide member (18) is guided and on rear control surfaces (36, 38) of the jaw members (22, 23) abuts to pivot the jaw members (22, 23) in a closed position in which the screw (26) is enclosed by the claw elements (22, 23) and the guide part (18) and the turning insert (16) is rotatable within the recess (14), and wherein the guide part (18) and the two claw elements (22, 23) on its outer circumference have circumferential outer toothing (29) which cooperates with a ratchet part (46) in order to tighten the screw (26) in a first ratchet position and preferably loosen the screw (26) in a second ratchet position ) to allow.

2. Ratchet wrench according to claim 1, wherein the jaw members (22, 23) in the region of their outer ends (32, 34) guide lugs (33, 35) which cooperate with the recess (14) of the guide member (18) to the Rotation of the turning insert (16) within the recess (14) to ensure a guide of the jaw elements (22, 23) in the recess (14).

3. Ratchet wrench according to claim 1 or 2, wherein the ratchet part (46) has a control element (48) with a first portion (49) and a second portion (50), each having an external toothing (52), wherein the control Relement (48) by means of an adjusting element (28) between the first and second ratchet position is pivotable and against the outer toothing (29) of the jaw members (22, 23) and the guide member (18) is biased and cooperates with the water to a tightening and to allow loosening of the screw (26) in the first and second ratchet position.

4. ratchet wrench according to claim 3, wherein the adjusting element (28) with a housing (12) held spring element (54) is preferably biased by a ball (56) against the turning insert (16).

5. Ratchet wrench according to one of the preceding claims, wherein the

External toothing (29) on the guide part (18) and on the jaw elements (22,

23) is arranged in a first (24) and a second (25), parallel thereto plane, wherein the control surfaces (36, 38) of the jaw members (22, 23) are arranged centrally between the two planes (24, 25), and wherein the external toothing (52) of the ratchet member (46) is disposed in associated first and second planes (24, 25).

6. A ratchet wrench according to claim 5, wherein a transition in the external toothing (29) between the guide member (18) and the jaw members (22, 23) in the first and second planes (24, 25) is angularly offset relative to each other.

7. A ratchet wrench according to one of the preceding claims, comprising a belt drive (64) with an output pinion (66) with an external toothing (68), which by means of an adjusting element (28) into one with the external toothing (29) of the rotary insert ( 16) meshing drive position is movable.

8. ratchet wrench according to claim 7, wherein the belt drive (64) has a Antriebrit- tel (65), which has a connection (71) for connection to a motor drive.

9. Ratchet wrench according to claim 7 or 8, wherein the output pinion (66) on the control element (48) of the ratchet member (46) between the first portion (49) and the second portion (50) is rotatably held and together with the control (48 ) between a central position for driving the rotary unit (16) and the first and second ratchet position for tightening or loosening the screw (26) is pivotable.

10. Ratchet wrench according to one of the preceding claims, with an actuating element (28) which cooperates with the guide part (18) such that in a return rotational position, a rotation of the rotary insert (16) is possible into the initial position, in the one Swinging the jaw elements (22, 23) in the open position and a removal of the ratchet wrench (10) from the screw (26) is made possible.

1 1. ratchet wrench according to one of claims 3 to 10, wherein the adjusting element (28) for the ratchet member (46), for the drive position for driving the rotary insert (16) and for the reverse rotational position for the reverse rotation of the rotary insert (16) in the starting position is a common adjusting element (28) which is held displaceably on the housing (12) in longitudinal direction between three positions, wherein in a first position of the adjusting element (28) the ratchet part (46) is pivotable between the first and second ratchet position, in a second position adjoining the ratchet part (46) is fixed in a middle position on the housing (12), in which the output pinion (66) meshes with the outer toothing (68) of the rotary insert (16), and in an adjoining third position is fixed in a middle position on the housing (12), so that the Abrels sprocket (66) with the outer teeth (29) of the rotary insert (16) meshes and Stellelemen t (28) cooperates with a stop (80) on the guide part (18) in order to stop the turning insert (16) during further rotation in the starting position.

12. Ratchet wrench according to claim 1 1, wherein the common control element (28) on the housing (12) on a pivot axis (60) pivotally supported guide block (74), in which a slide (75) is held longitudinally displaceable, wherein the slide (75) in the first position together with the ratchet part (46) is pivotable between the first and second ratchet position, wherein the slider (75) in the second position between guide elements (76, 77) is held in a central position such that an output pinion (66) of the belt drive (64) meshes with the outer toothing (29) of the turning insert (16), and wherein the slide (75) in the third position opposite the second position additionally in the direction of the rotary unit (16 ) is moved to cooperate with the stopper (80), so that the rotary unit (16) is stopped during rotation as soon as the starting position is reached.

13. Ratchet wrench according to claim 9 and 12, wherein the control element (48) of the ratchet part (46) together with the guide block (74) on the pivot axis (60) is pivotally supported and the output pinion (66) on a rotation axis (62) of Control member (48) is rotatably supported, which extends through the pivotable end of the guide block (74).

14. Ratchet wrench according to one of the preceding claims, wherein the turning insert (16) on the housing (12) is exchangeably received.