WO2013006887A1

WO2013006887A1 - Extension for a box spanner, in particular for a wheel nut spanner

Info

Publication number: WO2013006887A1
Application number: PCT/AT2012/050103
Authority: WO
Inventors: Reinhard SCHAUMDÖGL
Original assignee: Schaumdoegl Reinhard
Priority date: 2011-07-12
Filing date: 2012-07-12
Publication date: 2013-01-17
Also published as: EP2731806A1

Abstract

The invention relates to an extension (1, 22, 28) for a box spanner (2), in particular for a wheel nut spanner, having a retainer (3) for connecting the spanner shaft (4) of the box spanner (2) to the extension (1, 22, 28). In order to produce advantageous manipulation ratios, according to the invention the retainer (3) has a quick-release clamp (5) for clamping the box spanner shaft (4) to the extension (1, 22, 28).

Description

Extension for a socket wrench, in particular for a wheel nut wrench

The invention relates to an extension for a socket wrench, in particular for a wheel nut wrench, with a receptacle for connecting the key shaft of the socket wrench with the extension.

State of the art

In order to increase the leverage of a socket wrench when loosening wheel nuts, it is known from the prior art (DE840071 1 A1), an extension designed as a double bracket to a socket wrench, which may be a cross-key to attach. For this purpose, the double bow on a receptacle for connecting the key shaft of the socket wrench. The disadvantage of such extensions is that they are comparatively unfavorable to handle. These are in fact comparatively cumbersome to connect with the socket wrench. In addition, in addition, the loose connection of this extension with the socket wrench, which can solve the extension at the latest in a vertical position independently of the socket wrench and fall to the ground. Not only does this require cumbersome handling, but there is also the danger that the person working on the extension will be injured by such a sudden release. A safe and stable operation can thus not be guaranteed by such extensions. This also extension of GB2347639A can not change anything, which suggests using a wing nut to clamp a socket on a running board.

Presentation of the invention

The object of the invention is therefore to improve an extension of the type described in the introduction such that it can be fitted with a socket wrench. easy, fast and secure connectable and also solvable. In addition, the extension should be suitable for a variety of socket wrenches, and thus can be used universally with differently designed wheel nut wrenches.

The invention solves this problem by the fact that the recording has a quick release for clamping the socket key shaft to the extension.

If the receptacle has a quick release for clamping the socket key shaft to the extension, then it may be possible to quickly and easily connect the extension with the socket wrench or to separate it from this. This may be advantageous in that there are no additional tools, tools or the like to make or break this connection. Rather, it can now be possible to connect or disconnect by a few simple steps. Due to the simplified handling of the extension according to the invention, this can be particularly suitable for a variety of people. In addition, a quick release advantageously also allow the extension according to the invention can also be adapted to the diameter of a socket key shaft. As a result, the extension can also be used universally and be connected with sockets largely independent of the diameter of its shaft. Thus, a receptacle having a quick release for clamping the socket key to the extension can also offer significant cost advantages, as it may not be necessary to manufacture or purchase the extension in various designs corresponding to the different commercially available socket wrenches , In addition, a particularly strong non-positive connection can be made by clamping the extension according to the invention, whereby a safe and stable handling can be ensured. This can be of crucial importance if, for example, considerable forces are required in the course of loosening a wheel nut. Dissolves in the course of the connection of the extension with the socket wrench, not only Extension, socket wrench or the motor vehicle are damaged, but also the person who operates the extension and thus the socket wrench, injuries - such as sudden loss of a kick resistance - pull. All this can avoid the inventive extension over the prior art. In addition, a receptacle having a quick release for clamping the socket key shaft to the extension allows a connection to be made with a socket wrench that can remain in any position of the lever. This is advantageous in that it may not be necessary to reconnect the extension after each actuation with a socket wrench. This can lead to considerable handling advantages, not least in terms of time savings.

In general, it is noted that can be referred to as quick release clamps that solve or tension quickly. Often, in a quick release an eccentric, which is operated by a lever used. When clamping the quick release, the eccentric is swung over the pressure point and mechanically struck, causing a self-locking occur and the quick release can not open by itself. However, it is quite conceivable quick release, which can create over other structural measures a self-locking.

Forms the extension, with the recording firmly connected footboard for simplified handling of the socket wrench, wheel nuts can be advantageous by a step from above, ie operated using the leg strength or by shifting the body weight. This may be particularly advantageous because in this way usually much more force can be exerted on the lever, as would be possible by operation with the hands. Thus, the extension of the invention can facilitate a release of wheel nuts. Furthermore, a footboard, for example, by special shaping or training a special surface increase the grip and thus the operator safety. As slip-off protection, in particular a heel stop, knobs, grooves and the like may be provided. The risk, during operation, of the extension Slipping down can be significantly reduced by the improved grip of a foot on a running board.

If the footboard has a handle, a particularly versatile use of the extension can open up. The extension can then be safely operated by hand. By a special shaping of the handle, for example, the risk of slipping off and injuring itself in the course of actuation of the device can be reduced. Due to the improved grip, more force can also be exerted on the lever, thus further facilitating the loosening or tightening of wheel nuts. In addition, this positioning of the handle has the advantage that the leverage can be increased at the, the socket wrench averted end of the extension.

Forming the handle a heel stop, the operation of an extension can be facilitated and improved. A person operating the device can, with the help of a heel strike, find an optimal positioning of the foot on the running board. Furthermore, slipping of the foot acting on the extension is made more difficult in this way. This can be particularly useful when the extension is operated with excessive force - for example, when the footboard then turns abruptly when loosening a wheel nut towards the ground. The same may apply to persons who - for example due to lower physical strength - is trying to use the entire body weight to operate the extension, which is why the risk of slipping is also increased. Ease of operation and safety of the extension can be improved.

If the receptacle runs centrally in the longitudinal direction of the footboard and in particular below the tread surface, power transmission and handling of the extension can be additionally improved. Due to this positioning of the running board, namely a force transmission to the lever arm of the socket wrench can be ensured largely exactly by the axis of the pivot point. This may, inter alia, jeopardize the risk of declining or loosing the NEN socket wrench are reduced by the wheel nut. On any additional auxiliary devices, such as those known from the prior art, and support the extension relative to the ground, can thus be dispensed with. This can be advantageous in that only a small space requirement is required for stowing the extension and this can thus be particularly suitable for driving in vehicles. Furthermore, the shape of the footboard can be chosen largely independently and thus the footboard are adapted to the shape of the feet and / or the shoes to improve the grip during operation of the extension according to the invention.

If the receptacle picked up by the footboard projects at least partially under the heel area of the footboard, a particularly safe to use or a particularly stable extension can be created. Now, if the power transmission to the extension usually primarily over its, the socket wrench averted end, so that a greater leverage can be exercised. In a kick but also experience shows that the heel is particularly strong, so that a secure power transmission from the footboard to ensure the key shank and mechanical stresses on the footboard, such as bending of the heel area, can prevent.

Are at least partially provided reinforcing ribs between the tread of the footboard and the recording, an improved stiffening and thus a particularly stable extension can be created. Bending the extension can be largely prevented, which in turn can lead to improved ease of operation of the extension.

Includes the inclusion of a, the key shank recordable tube that carries the quick release in the region of its open end and cooperates with this to form its at least partially tapered to ensure a clamping of the key shank, a particularly stable connection can be ensured. By tightening the quick release, the tube can be pressed by forming a taper on the key shank and thus clamped to this. In addition, a tube which can be received by the key shank has the advantage of enabling a safe and even transmission of force from the extension to a socket key shank, even if the latter projects only a little beyond the quick release into the receptacle. In this context, it was possible to distinguish a tube made of metal, since this advantageously has only slight deformations.

If the pipe has slots in the area of the quick-release, a particularly strong force transmission of the quick-release to the key shank can be made possible. Due to the slots, the tube can be easily tapered by a quick release, which improves the fit of the tube on the key shaft. Likewise, this makes it possible to easily remove the key shank after releasing the connection from the pipe, which further improves the handling of the extension according to the invention. In addition, the tube may have an end-side bead in order to make it difficult to pull off a quick-release fastener 5 provided, for example, loosely on the tube, during its open position.

If the receptacle has a neck formed by the extension with a recess for receiving the key shaft, the neck carrying the quick release, a particularly simple production of an extension can be ensured without having to accept disadvantages with regard to its stability. A stable and cost-effective extension can thus be be made available. Does the quick release with the neck to form an at least partially tapering of the recess for clamping the key shank together, as already described, a secure and firm connection can be made.

If the receptacle has a groove for a spring of the key shank, it can be ensured that a rotation of the socket wrench and extension about the longitudinal axis of the recess of the extension is prevented. This is clearly crucial for safe operation of the extension according to the invention - for example, as a non-uniform force on the footboard, such as a rotation of the footboard around the longitudinal axis of the socket key shaft and thus could slip from the footboard of the footboard. If the spring of the key shaft designed as a spring pin, among other things, the length in which a key shank can be pulled out of a receptacle and / or inserted into a receptacle, can be specified.

If the handle is spring-loaded via a pivot bearing on the footboard and the footboard has a rotation stop for the handle, advantages in the use and operation of the extension can be opened up. In this way, namely, the possibility can be created to use the extension in the manner of a torque wrench. According to the invention can thus - of course, depending on the length of the lever arm formed by the extension - a certain torque to be exerted on a wheel nut reaching its haptic and / or optical in the course of actuation of the extension by striking the handle on the rotation stop of the running board is shown. This is so far of importance because of the automotive industry for each vehicle model exactly specified tightening torques are given.

If the receptacle has at least one viewing recess on the inserted socket wrench, the length of the lever arm formed by the extension can be determined in a simple manner. The leverage exerted by the operation of the device can thus be estimated and determined. Consequently As a result, the above-mentioned tightening torque can be determined and / or changed as needed.

If the recording has an indication of a tightening torque as a function of the depth of the socket wrench inserted into the receptacle, a further improved operation of the extension can take place and, for example, the tightening torque can be varied in a simple manner as required. A particularly versatile and variably applicable extension can thus result.

The invention also comprises a lever device with an extension and with a key received by the extension, in particular socket wrench.

In general, it is mentioned that, when the quick release comprises a movable in response to the pivoting movement of the actuating lever along an axis push rod, a particularly strong clamping of the device can be ensured to a socket key shaft in a structurally simple manner. By a lever effect on this displaceable push rod, it is namely possible to build a particularly high tensile force, for example on clamps of a quick release. In addition, a variant of a push rod tensioner is structurally simple and allows a compact design of the device according to the invention. If the actuating lever has an eccentric and the actuating lever cooperates with the push rod for tapering the clamp of the quick-release, wherein the push rod and the actuating lever are at least partially supported in recesses of the clamp, a particularly stable device can be created. By a storage of push rod and operating lever, it is namely possible to spare mechanically particularly stressed parts of the quick release.

Short description of the drawing In the drawings, for example, the subject invention is illustrated in more detail using an exemplary embodiment. Show it

1 is a plan view of the extension for a socket wrench,

2 is a side elevational view, partly in section, of the extension of FIG. 1; FIG. 3 is an elevational sectional view of the apparatus of FIG. 1 with the socket driver clamped;

4 is a bottom view of the extension shown in Fig. 1,

5 is an enlarged partial view of the quick release of FIG. 2,

6 is a plan view of a further embodiment of the extension according to the invention,

7 partial view with an inserted into the extension socket wrench according to Fig. 6,

Fig. 8 is a further, partially sectioned partial view of FIG. 6 and

Fig. 9 is a partially torn side view of a third embodiment of the extension according to the invention.

Way to carry out the invention

The example shown extension 1 as an embodiment has a receptacle 3 for a not fully illustrated socket wrench 2. About this recording 3, the socket key shaft 4 of the socket 2 with the extension 1 can be connected. In general, it is noted that a socket wrench 2 may constitute a wheel nut wrench, a wrench or other key, which wrenches may all serve to open wheel nuts of a wheel of a motor vehicle. Based on an extension 1, it is now possible to extend the lever arm of the socket wrench 2 and subsequently to facilitate the release of wheel nuts, not shown. However, in order to firmly connect the extension 1 to a socket wrench shaft 4, it has a high flexibility in the fastening position on the socket wrench 2, the receptacle 3 has a quick release 5 for clamping the socket wrench 2 or its socket wrench 4 to the extension 1. Thus, a frictional connection between the extension 1 and the socket key shaft 4 are achieved, which persists in all lever positions, allowing a stable handling.

As shown in FIG. 3, the receptacle 3 a, the socket wrench 4 recordable tube 6, which carries the quick release 5 in the region of its open end 12 and cooperates with this to form its at least regionally tapered 9 to a clamping of the socket key shaft 4 to ensure. The degree of rejuvenation 9 has been clearly exaggerated for reasons of clarity. In Fig. 3 is further apparent that the tube 6 has an end bead 21 so as to make it difficult to remove the loosely provided on the pipe 6 quick release 5 in its open position.

The tube 6 is slotted in the region of the quick release 5, as shown in FIG. 1, for example, can be removed. These slots 7 allow an improved clamping of the extension 1 on the socket wrench shaft 4, since it allows the tube to be tightened more elastically to the socket wrench shaft 4 in the region of the taper 9.

The receptacle 3 has a firmly connected footboard 10. A footboard 10 offers advantages in terms of operation of the extension 1, because it allows safe operation and can be used by the leg strength considerably more force.

As can be seen in Fig. 1, the tube 6 has the advantage that a secure power transmission to the socket key shaft 4 is ensured even if the socket key shaft 4, the pipe 6 only partially fills. The recorded from the running board 10 tube 6 of the receptacle 3 namely projects at least partially under the heel portion 27 of the footboard 10, and thus stabilizes the extension 1 and the connection of the extension 1 with the socket key shank. 4 In particular, in Fig. 1 it can be seen that the tube 6 of the receptacle 3 in the longitudinal direction of the footboard 10 extends centrally and in particular below the tread surface 1 1. This in turn facilitates the transmission of power to the socket key shaft 4, since the extension 1 runs perpendicular to the axis of the thread of the nut, not shown, corresponding to the socket key shaft 4. In addition, a receptacle 3 extending below the tread surface 11 offers the advantage that the shape of the extension 1 or the footboard 10 is virtually unaffected by its arrangement.

In addition, the footboard 10 has a, a handle 13 forming heel stop 15. Thus, the operation by hand can also be improved, since the handle 13 allows improved grip and the risk of slipping off the handle hand can be reduced. In addition, the extension forms grooves 17, which improve the grip on the running board and thus reduce the risk of slipping off the device

The tread surface 1 1 of the footboard 10 includes at least partially via reinforcing ribs 14 to the pipe 6, which can be seen in FIG. 4. As a result, the stability of the extension 1, can be further increased, in particular even if, for example, the foot is not placed on the footboard 10 in the middle or on the entire surface during the operation of the extension. As a further embodiment, it is conceivable that the tube 6 is inserted into a cylindrical recess of the footboard and bolted to the footboard, which has not been shown in detail.

According to FIG. 5, it can further be recognized that the quick release 5 designed as a push rod tensioner comprises a push rod 17 displaceable along an axis as a function of the pivoting movement of the actuating lever 16.

For self-locking, the actuating lever 16 has an eccentric 18 and cooperates with the push rod 17 for tapering the clamp 19 of the quick release 5. Particularly stable construction conditions arise by the particularly force-loaded parts, namely at least push rod 17 and the Operating lever 16 in recesses 20 of the clamp 19 are at least partially stored.

By operating a nut 8, the storage of the push rod 17 relative to the eccentric 18 is adjustable. Thus, for example, the holding force of the quick release is variable or adjustable so that the eccentric can be pivoted by pivoting the actuating lever 16 beyond its pressure point and pressed so as to activate the self-locking and thus to prevent accidental opening of the quick release.

FIGS. 6 to 8 show a further embodiment of the extension according to the invention. Thus, Figure 6 shows an extension 22, with a receptacle 3, which has a neck 22 formed by the extension 23 with a recess 24 for receiving the key shaft 4. Thus, the production of the extension 22 can be simplified. The neck 23 carries the quick release 5 and cooperates with this to form an at least regionally tapered portion 9 of the recess 24, whereby a firm connection between key shank 4 and extension 22 is achieved, which can be taken in particular from FIG.

FIG. 8 shows that the receptacle 3 has a groove 25 for a spring 26 of the key shaft 4. Thus, as described, a secure operation of the socket 2 associated with the extension can be ensured since rotation of the extension 22 about the longitudinal axis of the key shank 4 is prevented - even with comparatively powerful occurrence on the extension 22. The spring 26 is after this Embodiment designed as a spring pin, whereby, inter alia, a limitation of the extension length of the key shaft 4 can be achieved from the receptacle 3. It is conceivable, but not shown in more detail in the figures, that the plug has a correspondingly extending groove of the extension spring, wherein also such a shaped groove can be provided as or with a spring pin. 9, a further extension 28 is shown, which differs from the extensions of FIG. 1 and FIG. 6 substantially in that the handle 13 is fixed spring-loaded on the running board 10 via a pivot bearing 29. This spring load is created by a over their legs on the footboard 10 and the handle 13 supporting leg spring 30. The handle 13 can thus perform a rotational movement 31 relative to the footboard 10. The performed against the spring force rotational movement 31 is limited by a rotation stop 32 of the footboard 10. This haptic and visually perceptible limitation of the rotational movement 31 of the spring-loaded handle 13 gives the user a feedback as to whether the tightening torque, applied by means of the lever of extension and socket wrench 2, has been reached. The lever length is easy to adjust, because the receptacle 3 has a viewing recess 33, namely the groove 25 which can be seen in FIG. Depending on the depth of the socket 2 used in the receptacle 3, the torque can now be changed. Thus, different tightening torques can easily be detected by means of the display 34, which results in the respective tightening torque corresponding to the insertion depth. An extension 28 with the function of a torque wrench is created.

Claims

Patent claims

1 . Extension for a socket wrench (2), in particular for a wheel nut wrench, with a receptacle (3) for connecting the key shaft (4) of the socket wrench (2) to the extension (1, 22, 28), characterized in that the receptacle (3 ) has a quick release (5) for clamping the socket key shaft (4) to the extension (1, 22, 28).

2. Extension according to claim 1, characterized in that the extension (1, 22, 28), with the receptacle (3) fixedly connected footboard (10) for simplified handling of the socket wrench (2) is formed.

3. Extension according to claim 2, characterized in that the running board (10) has a handle (13).

4. Extension according to claim 3, characterized in that the handle (13) forms a heel stop (15).

5. Extension according to claim 2, 3 or 4, characterized in that the receptacle (3) in the longitudinal direction of the running board (10) centrally and in particular below the tread surface (1 1) extends.

6. Extension according to one of claims 2 to 5, characterized in that the footboard (10) received recording (3) at least partially below the heel area (27) of the running board (10) protrudes.

7. Extension according to one of claims 2 to 6, characterized in that between tread surface (1 1) of the running board (10) and the receptacle (3) at least partially reinforcing ribs (14) are provided.

8. Extension according to one of claims 1 to 7, characterized in that the receptacle (3) comprises a, the key shank (4) receivable tube (6) which carries in the region of its open end (12) the quick release (5) and with the- sem to form its at least partially tapered (9) cooperates to ensure a clamping of the key shank (4).

9. Extension according to claim 8, characterized in that the tube (6) in the region of the quick release (5) has slots (7).

10. Extension according to one of claims 1 to 7, characterized in that the receptacle (3) formed by the extension (22, 28) neck (23) having a recess (24) for receiving the key shaft (4), wherein the neck (23) carries the quick release (5) and cooperates therewith to form an at least regionally narrowing (9) of the recess (24) for clamping the key shaft (4).

1 1. Extension according to one of claims 1 to 10, characterized in that the receptacle (3) has a groove (25) for a spring (26), in particular a spring pin, the key shaft (4).

12. Extension according to one of claims 3 to 1 1, characterized in that the handle (13) via a pivot bearing (29) on the running board (10) is spring-loaded and that the footboard (10) has a rotation stop (32) for the handle (13).

13. Extension according to claim 12, characterized in that the receptacle (3) has at least one viewing recess (33) on the inserted socket wrench (2).

14. Extension according to claim 12 or 13, characterized in that the receptacle (3) has a display (34) for a tightening torque as a function of the depth of the receptacle (3) inserted socket wrench (2).

15. lever device with an extension (1, 22, 28) according to any one of claims 1 to 14 and with one of the extension (1, 22, 28) received socket wrench (2), in particular wheel nut wrench.