DE1503109A1 - Wrench with rotating body and free-wheeling clamping elements - Google Patents

Description

Wrench rait rotating body and freewheel type

Clamping elements

■ I

The invention relates to a wrench with a rotating body arranged in a carrier equipped with a lever arm Antriebseleraent and on the circumference of the latter arranged free-wheeling rotatable, spring-loaded clamping elements.

The previously known and practical for use when tightening or loosening screws, nuts, turning drills, screwdrivers or the like. Use hand drive devices in the form of ratchets, ratchets or the like all ratchet teeth with resilient ratchets or toothed retarding bodies that work in one direction of rotation transmit a torque and can move freely in the opposite direction out of engagement. The drive movement can always only take place step by step or step by step in one level, but this is usually narrow limited drive movement range of the hand lever arm does not look, the drive movements satisfactory and fast perform.

There are already wrenches with single or paired clamping elements around a cylindrical wrench socket been proposed, however, a simultaneous and even attack of the clamping element ^ on the circumference of the key nut in the absence of appropriate centering of the key nut in the

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Clamping elements and guide surfaces in the key head are not sufficient was secured and guaranteed and the use of force was strictly limited. The leadership or centering predominantly due to guide surfaces in the wrench head, handling with excessive frictional forces also resulted, see above that up to now there has been a general aversion among manufacturers of such wrenches to the production such a wrench set, although in practice in many cases an urgent need for one Wrench with a stepless drive consists of the key nut, to the point of attachment that is difficult to access Such a wrench also desired a pivoting mobility of the key shaft transversely to the plane of the direction of rotation is.

The purpose of the invention is to provide an improved wrench which meets all practical requirements It does it much better than the previous ones Wrenches was possible, which is easy and cheap to manufacture and easy and safe to use difficult cases guaranteed.

This is achieved by the fact that with a wrench of the aforementioned type when the rotating body is designed as a rotating and pivotable ball socket between the rotating body and the ball socket Distributed over the circumference in recesses of the carrier with wedge-shaped to the circumferential direction of the ball socket Abutment surfaces movable in the circumferential direction of the ball socket, spring-loaded clamping elements are provided, and that the carrier middle and outer, surrounding the ball socket Has parts which are rigidly connected to one another.

Further details of the invention are explained in more detail in the description in connection with the drawing.

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BATH ORIGINAL

In the drawing are some embodiments of the subject of the invention shown schematically. It shows:

Fig. 1 and 2 an embodiment of a wrench with spherical rotating body and lever arm in view and side view,

Fig. J5 part of a further embodiment of the

Wrench head with a cylinder-like elongated rotating body on the end faces and a subdivided Carrier for the Au rotating body in side view,

4 and 5 modified embodiments of the wrench head with different arrangements of the clamping and centering elements in the carrier of the wrench in view with omitted front cover plate,

6 shows an embodiment of the wrench with a subdivided carrier for the rotating body and a one-piece Hand lever in side view.

In Fig. 1 and 2, 1 denotes the middle part, 2 and 3 the outer plate-like cover parts of the carrier 4 with matching recesses for a spherically shaped rotating body $ , which is rotatably and pivotably mounted in a cavity of the carrier 4 adapted to its circumference . The spherical rotating body 5 has a square cross-section plug-in or push-through channel 6 with outwardly projecting cylindrical parts on opposite end faces as limit stops for the pivoting movement of the rotating body 5 in the carrier 4

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BATH

Circumferentially evenly distributed recesses 8 of the central support part 1 proceeding from the cavity 4a Clamping elements 10 loaded with springs 9, preferably in the form of small rollers or cylinders, are arranged. It can balls can also be used as clamping elements 10. The recesses 8 have opposite the circumference of the central spherical rotating body 5 in a circumferential direction the illustrated embodiment of FIG. 1 in the direction of clockwise rotation, starting from the tangential direction inwardly wedge-shaped inclined abutment surfaces 8a, the angle of inclination of which is at least about 8 ° to 15 °. the Clamping elements 10 are pressed into the narrowing part of the recesses 8 by the springs 9. The middle part 1 can be subdivided with continuous steel lamellas 1 mm thick or less. (Fig. 3) The outer abutment surfaces 8a of the recesses 8 for the clamping elements 10 can be covered with steel plates 8b. The three in their outlines matching parts 1, 2, 3 of the carrier 4 and the associated lever arm part 11 are in the lever arm part 11 held together by screws 12 a and in the ring part of the carrier 4 surrounding the rotating body 5 by screws 12. The lever arm part 11 of the carrier 4 also has a handle 15 made of rubber, wood, pushed over it in the shape of a hoist. Hard rubber or plastic. In the plug-in or push-through channel 6 are still grids in the form of recesses 14 for Spring-loaded detent balls on the plug-in element, which has a cross-section that corresponds to the channel 6, as an extension element or socket wrench link arranged.

In the embodiment of the carrier head according to FIG the rotating body 5 on the opposite end faces cylinder-like Projections 15 as limit stops for the pivoting movement of the rotating body 5 * in a spherical Cavity 4a is rotatably and pivotably mounted. The remaining

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Parts are designed and arranged as in Figs.

In the embodiment of the carrier head 4 according to FIG. 4, three juxtaposed clamping elements 10 with springs 9 are arranged on the side of the lever arm part 11 in corresponding recesses 8 narrowed to one side in the circumferential direction with Wlderlagflächelamellen 8b for the roller or roller-shaped clamping elements 10, which extend only over the central part of the carrier 4 or over an annular body 18 which is arranged in the central part 1 of the carrier 4 and, together with the clamping elements 10, through the outer plate-like parts 19, 20 of the carrier 4 (Fig. 6) is covered. Over the remaining circumference of the annular body 18 kIxjbA centering elements 22 in the form of balls, rollers or rollers are arranged in recesses 21, which are rotatably and pivotably mounted with little play in the central cavity 4a of the parts 1, 2, 18 of the carrier 4 Rotary body 5 serve as an abutment and centering means. The annular body 18 in the carrier 4 engages in FIGS. 4 and 5 with a cam-like projection 2} in a matching recess 24 of the remaining outer central annular part 1 of the carrier 4 and is thereby secured against rotation. In addition, three screws 25 hold the outer plate-like parts 19, 20 with the intermediate parts 1 and 18 of the carrier 4 together. Here, the ring-shaped body 18 of the carrier 4, together with the parts 19, 20 of the carrier 4 that cover both sides, forms the cavity 4a for the spherical rotating body 5. The cavity 4a for the rotating body can also be created through cylindrical holes in the individual plate-like parts 1, 2, 2 of the carrier 4 in a stepped form from the outside to the inside, increasing according to the ball diameter. However, only the outer cover plates 19, 20 or 2, 2 can be provided with smaller holes, and the remaining central plate-shaped parts can be provided with holes of the same size.

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When executing according to Flg. 5 are in the annular Body 18 of the carrier 4 the centering or abutment elements 22 and their storage recesses 21 over the inner Perimeter of the annular body 18 of the support 4 distributed and The clamping elements 10 with their recesses 8 are arranged in between. The remaining parts of this embodiment are as in Flg. 4 formed and arranged.

From the Flg. 4 to 6, the mJuuk side views of the embodiment, it can be seen that the lever arm part is made in one piece together with the middle part 1 of the carrier 4 and at the transition point from the lever arm part 11 or 11a to the carrier 4 for the rotating body 5 with the approximately circular ring-shaped Cover plates 19, 20 and the annular body 18 is detachably connected by means of through screws 25. The ring-shaped body 18 surrounding the rotating body 5 can be composed of three ring-shaped disks 26, 27 according to FIG the middle part is united with the lever arm part. The bottoms or abutment surfaces 8a of the recesses 8 for the clamping element 10 can again be made more resistant by inserting leaves 8b of particularly hard or tempered material extending over the entire thickness of the annular body 18. The middle, disk-shaped part of the subdivided ring-shaped body can be produced in one piece with the handle part 11 or 11a of the wrench as a die or connected to it by welding.

On one of the end faces of the rotating body 5, between this and the surrounding carrier 4 or one connected to it Part of a measuring device 29 with a reading scale for the

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Torque force required by the wrench when tightening screws or nuts (Fig. 6) the maximum torque exerted by the wrench to eat.

The subdivision of the middle part 1 according to FIs 2 into sheet steel lamellas 1 mm or less has the advantage of cheaper production by simply punching them out Steel lamellas, putting them together and connecting them to the outer parts 2 and 3 by means of screws or rivets, spot welding Or the like. In certain circumstances, these lamellas do not need to be remunerated at a later date. These Subdivision of lamellas can also be used in the other embodiments.

The one-piece design of parts 1, 2, 3 of the handle part 11 and the carrier part 27 of the key according to Flg. 6 is recommended for keys that are particularly heavily used are to be manufactured and appropriate tools for closed-die forging or pressing are available.

The attachment of the central annular body 18 and possibly its subdivision into several plates or lamellas simplifies the production by restricting valuable Steel material on this annular body or its parts or lamellae.

The illustrated and described embodiments can be adapted to the respective cases of practice in the details undergo numerous modifications without departing from the scope of the invention. The individual embodiments can also be combined with each other.

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Claims (1)

Claims 1. Wrench with in one equipped with lever arm Carrier arranged rotating body as a drive element and arranged on the circumference of the latter, free-wheeling rotatable, Spring-loaded clamping elements, characterized in that when the rotating body is designed as a rotating and pivotable ball socket (5) between the carrier (4) and the ball socket (5) distributed over their circumference in recesses of the carrier (4) with wedge-shaped to the circumferential direction of the ball socket (5) extending abutment surfaces in the circumferential direction the ball socket (5) movable, spring-loaded clamping elements (10) are provided, and that the carrier (4) middle and outer, the ball socket (5) surrounding parts (1-5) which are rigidly connected to one another. 2. Wrench according to claim 1, characterized in that apart from the clamping elements (10) rotatably mounted Centering elements (22) for the ball socket (5) are arranged in the carrier part. 5. Wrench according to Claim 1, characterized in that that one or more spring-loaded clamping elements (10) in side-by-side arrangement over the remaining circumference of the Rotary body (5) distributed centering elements (22) are arranged opposite one another. 4. Wrench according to claim 2 or 3, characterized in that that over the circumference of the rotating body (5) distributed alternately spring-loaded clamping elements (10) and centering elements (22) are arranged in the carrier (2). 109825/0059 ·, ·,; _rt Ds. 2 No. 1 SaU 3 of the change aeee. w. 4.9. I5Ü3109 5 · wrench according to claim 1, characterized in that the central, annular part (1) of the carrier (4) in its the spherical rotating body (5) receiving part has an inner annular body (18) in which all recesses (8, 21) for the clamping (10) and centering elements (22) for the spherical rotating body (5) are arranged and are surrounded by an outer ring part which is integrally connected to the rest of the carrier part (1) is, wherein the inner ring part (18) with an outwardly projecting, after the lever arm of the carrier (4) directed, cam-like part (23) in an adapted to this Recess (24) of the remaining middle outer support part (1) engages and is secured against rotation. 6. Wrench according to claim 1, characterized in that the rotating body formed as a ball (5) on two dia- I metrically opposite sides is flattened and provided with parallel end faces on which cylindrical projections adjoin. 7. Wrench according to one of claims 1 to 6, characterized in that the spherical rotating body (5) # the clamping (10) and centering elements (22) and their abutments (8a) or pivot bearing parts (21) from especially hard, pressure-resistant material or made of material that, after processing, becomes the desired Shaping can be tempered or hardened. 8. Wrench according to claim 6, characterized in that the particularly hard abutment (8a) and the recess pivot bearing (21) for the clamping (10) and centering elements (22) by support plates or partially sleeve-shaped Insert body made of hard, resistant material are covered. - 10 - 109825/0059 ISU31Ü9 - ίο - Wrench according to Claim 1, characterized in that the lever arm part of the wrench is in one piece executed and only in the carrier (4) for the rotating body (5) in three parts with a central, rigid with the lever arm part connected part (1) and cover plates (19, 20) on both sides is divided. Wrench according to Claim 1, characterized in that the carrier (4) extends continuously with the lever arm part Steel lamellas or plates are composed, which are covered by somewhat thicker cover plates and put together by means of screws, rivets, point welding or the like. Together are united. 109825/0059 ORIGINAL INSPECTED L e r s e i t e