DE202008010206U1 - socket - Google Patents

Abstract

socket (10, 10a) for polygonal screws or nuts, comprising a key body extending along an axis (20) (11, 11a), which at one end a clamping portion (12) for Clamping the socket wrench into a quick-action chuck or the like. Has and at the other end one in the axial direction oriented first receptacle (14), in particular in the form of a hexagon socket (14), for receiving a polygonal screw or nut, wherein in the wall (19) of the first receptacle (14) in the first Receiving (14) projecting a clamping element, in particular in shape a ball is mounted, which clamping element against the pressure a concentric around the first recess (14) around the key body (11, 11a) arranged clamping spring (17, 17a) radially outwardly movable characterized in that for fixing the clamping spring (17, 17a) on the key body (11, 11a) on the clamping spring (17, 17a) an inwardly projecting fixing means (18, 18a) are arranged is, with which the clamping spring (17, 17 a) in a corresponding Recess ...

Description

The The present invention relates to a socket wrench for polygonal screw heads or nuts according to the preamble of the protection claim 1.

On The area of the above socket wrench is a simple one and asked for safe operation, which preferred one-handed executable or can be made in particular No additional effort for installations and on construction sites or even risks from falling screws or nuts too produce.

At present, many solutions are known to ensure safe and easy operation. Representative of a multiplicity of writings is therefore the EP 0934140 B1 called. The socket mentioned therein has for frictionally locking a polygonal screw head one, with a by spring force against a lateral drive surface or a polygonal edge of a screw head movable ball, which is arranged in a Wandungsdurchbrechung of the socket wrench. The ball lies in a wall bore with internal support shoulders. To apply the spring force for the frictional locking a sleeve-shaped, slotted, incorporated in a circumferential groove of the socket wrench clamping ring is provided. To ensure that the ball is not in the area of the slot, is in accordance with the EP 0934140 B1 claimed as essential to the invention that the connecting line of the centers of the key head circumference with the slot center of the clamping ring slot encloses an angle which is greater than 90 °. In addition, the clamping ring is fixed by means of a molded-on socket wrench in its circumferential position, the nose is arranged according to the invention on one of the perpendicular to the key longitudinal end faces and engages in a, defined by the socket wrench body, direction in a correspondingly shaped recess on the clamping ring ,

The in the EP 0934140 B1 The disclosed solution is relatively expensive to produce, which in turn leads to relatively high production costs.

It It is therefore an object of the present invention to provide a socket wrench to provide which does not have these disadvantages has a simpler structure and thus more economical to produce is.

These The object is achieved according to the invention, that a socket wrench for polygonal screws, comprising a key body extending along an axis, which at one end a clamping section for clamping the Socket wrench in a quick chuck or the like has and at the other end oriented in the axial direction first receptacle, in particular in the form of a hexagon socket, for Recording a polygonal screw has. In the wall of the first receptacle is a clamping element projecting into the receptacle, especially in the form of a ball, stored. The clamping element is against the pressure of one, concentric around the first shot on the key body arranged, clamping spring radially outwardly movable. To fix the clamping spring on the key body with respect their peripheral position is on the clamping spring after inside projecting fixative, for example, a radially inward angled finger or an approximately radially inward projecting formation, arranged with which / which the clamping spring in a corresponding radial recess on the key body engaging. The fixing agent may be added to any one as needed radial or axial position of the spring are arranged, for Example at the edge areas or in the middle of the spring.

There a finger-shaped fixing means of the clamping spring by a Bend and the corresponding radial recess of the key body, for example in the form of a radial bore, simple and inexpensive can be produced, is a more economical production without a Loss of functionality achievable. At another Embodiment is the fixing means by a radial formed inwardly projecting shape, which by a simple, inexpensive local deformation of the sleeve-like Clamping spring is achievable. Depending on the embodiment and extensibility the clamping spring is this in the region of the fixing agent to be formed additionally pre-perforated to facilitate deformation. This embodiment allows a waiver on the finger-like turn, but without a loss of functionality having to accept.

There the new fixing the clamping spring in both embodiments even against a displacement in the axial direction on the key body secures, depending on the requirements of the socket wrench a circumferential groove for receiving the clamping spring can be dispensed with.

The inwardly projecting fixing means comprises, for example, a radially inwardly angled finger or an inwardly projecting pin or an inwardly projecting formation. With the fixing of the clamping spring, which bezüg Lich its circumferential position in a corresponding Aufnehmung, for example, engages a second radial bore on the key body, the clamping spring is clearly fixed in its relative position to the key body. This allows the functional requirements of the socket wrench to be efficient Way to meet.

ever according to embodiment of the clamping spring, this is in the circumferential direction interrupted, d. H. it does not cover the entire circumference of the key body. The interruption has an opening angle in the range from 20 ° to 120 °, especially from about 30 ° to about 80 °, up. It is important that the interruption not located in the support area of the clamping element and itself not during operation of the socket wrench can move to the support area.

Thereby, that the clamping spring in the circumferential direction of the key body not completely encloses, is the mountability of the Clamp spring on the key body improves what turn to economic benefits in the production of the socket wrench leads.

at further advantageous embodiments of the socket wrench is the clamping spring in a circumferential groove of the key body stored, wherein the groove in the region of the clamping element concentric is designed for receiving the key body. Such embodiments have opposite to grooveless Socket wrench has the advantage that the clamping springs in the axial Direction additionally against unintentional axial displacements are secured. In addition, the sunk in the groove springs User-friendly, as it keeps the user stuck largely prevent the spring.

Of the Key body has a second radial bore on, which for the storage of the clamping element in the key body serves. It is an angular distance from the first to second radial bore in the circumferential direction as required, for example 90 ° or 180 °. Due to the angular distance in the circumferential direction become the tasks of the clamping spring, namely the application a radially acting clamping force on the clamping element and the Save or positioning the clamping spring on the key body spatially separated from each other and solved individually, which reduces the complexity and the precision of the Affected parts can be reduced without loss of function.

The The invention is illustrated in the drawing, for example, and will be explained in detail below with reference to the drawing.

It show purely schematically:

1 a view of a first embodiment of the inventive socket wrench without clamping element and clamping spring;

2 a sectional view of the socket wrench according 1 along the line AA with mounted clamping spring;

3 Detail view Z according to 2 with the engagement of the angled finger of the clamping spring in a radial recess of the key body;

4 a view of a second embodiment of the inventive socket wrench without clamping element and clamping spring;

5 a sectional view of the socket wrench according 4 along the line BB with mounted clamping spring.

As the figures can be seen, a first embodiment of the inventive socket wrench 10 a substantially cylindrical key body 11 on which one axle 20 or a main axis defined.

For rotatably receiving the socket wrench in a rotationally driven tool holder, such as a chuck, a quick-change chuck or the like, has the key body 11 a clamping section 12 on. In the in 1 shown embodiment is a clamping section according to recording / drive after DIN 3126 E6.3 , in which the socket wrench 10 can be put into it.

Front side in a chucking section 12 opposite side of the key body is a hexagon socket 14 arranged to accommodate hexagonal screw heads or hex nuts. The hexagon socket 14 corresponds to one example in the example shown DIN 475 standardized recording. A circumferential groove 13 rectangular cross-section is in the shell area at the hexagon socket 14 of the socket wrench 10 arranged such that radial to the axis 20 a the mechanical requirements of the socket wrench 10 enough wall 19 ge is formed, which mouth side of the hexagon socket 14 merges into a flange-like edge area. The groove 13 serves to accommodate a clamping spring 17 , on the basis of the 2 and 3 will be discussed in more detail.

For torsion-proof reception of the clamping spring 17 in the groove 13 points the key body 10 a recess 16 on. Depending on the embodiment of the key body is the radial recess 16 a radial bore whose axis is preferably perpendicular to the axis 20 runs. In synopsis with the 2 and 3 shows that the clamping spring 17 essentially has a cross section in the form of a circular ring segment and at one circumferential end a radially inwardly formed or bent fingers 18 having, which in the radial recess 16 of the key body 11 intervenes. The finger 18 can be, for example, in one step by a punching operation on the spring 17 form.

Previously for mounting the clamping spring 17 on the key body 11 is a spherical clamping element (not shown in the figure) in a second, the wall of the hexagon passing through recess 15 brought in. The second, preferably radially extending recess is, for example, a bore which forms the wall 19 of the key body 11 in the area of the groove 13 penetrates, with inner support shoulders of the second bore 15 Prevent falling out of the clamping element radially inwards into the hexagon area. The person skilled in the function and operation of the clamping element is known, which is why not discussed here in detail. The second hole 15 is in the embodiment in the direction of the axis 20 axially offset and has an angular distance to the first radial bore 16 in the circumferential direction at an angle w1 of about 90 ° and opens approximately centrally with respect to an area of the hexagon socket 14 , The known from the prior art, arranging the clamping element in a corner region of the hexagon socket can also be realized in the present invention.

Due to the fact that the clamping spring 17 is interrupted in the circumferential direction, is the clamping spring 17 when mounted on the key body 11 radially expandable and the insertion of the finger 18 in the first hole 16 easy to do. Experiments have shown that good clamping values can be achieved with a good widening of the clamping spring with an interruption of an angle w2 of approximately 30 ° seen in the axial direction and the clamping spring 17 positive fit on the key body 11 is held.

The skilled person will appreciate that the band-like clamping spring 17 serves to apply a radially acting clamping force on the clamping element and the latter ensures against radial falling out.

The 4 shows a second embodiment of the inventive socket wrench 10a , the clamping spring, however, is not shown for ease of understanding of the structure in this view. As the second embodiment of the socket wrench 10a largely identical to the first embodiment of the socket wrench 10 only the differences are discussed below. The same elements are provided with the same item numbers, while the same-acting parts are provided with the suffix "a".

Unlike the key body 11 points the key body 11a a first radial bore 16a which, in the circumferential direction with an angle w1 of about 180 ° to the second bore 15 is offset. The first hole 16a is in the direction of the axis 20 to the second radial bore 15 shifted so that they are in the area of the hexagon 14 but without the wall 19 to break through.

In another embodiment, which will not be discussed in more detail, penetrates the bore 16a the wall 19 , provided the intended functionality of the hexagon socket 14 is guaranteed.

In this embodiment, the opening angle w2 of the clamping spring 17a in the groove 13 in the assembled state about 80 °. In this case, the opening angle w2 with respect to the second bore 15 offset by a center angle w3 of about 100 ° in the circumferential direction. Experiments showed that with such an embodiment of the socket wrench 10a good clamping values of the clamping spring 17a can be reached with a good mountability of the clamping spring.

Depending on requirements, the approximately radially inwardly projecting shape 18a the clamping spring 17a before or after assembly of the clamping spring 17a on the key body 11a feasible, for example by a pin-like punch the clamping spring 17a in a roughly crescent-perforated area local to the axis 20 deformed so that an approximately radially inwardly directed, conical shape is formed.

10 10a

socket

11 11a

key body (cylindrical)

12

chuck

13

groove (circulating)

14

Allen

15

drilling

16 16a

admission

17 17a

clamping spring

18

finger (Angled)

19

wall

20

axis

w1

angle

w2

opening angle

w3

center angle

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 0934140 B1 [0003, 0003, 0004]

Cited non-patent literature

• - DIN 3126 E6.3 [0022]
• - DIN 475 [0023]

Claims (6)

Socket wrench ( 10 . 10a ) for polygonal screws or nuts, comprising one along an axis ( 20 ) extending key body ( 11 . 11a ), which at one end a clamping section ( 12 ) for clamping the socket wrench in a quick chuck or the like., And at the other end oriented in the axial direction of a first receptacle ( 14 ), in particular in the form of a hexagon socket ( 14 ), for receiving a polygonal screw or nut, wherein in the wall ( 19 ) of the first recording ( 14 ) in the first recording ( 14 ) a clamping element, in particular in the form of a ball, is mounted, which clamping element against the pressure of a concentric about the first recess ( 14 ) around on the key body ( 11 . 11a ) arranged clamping spring ( 17 . 17a ) is movable radially outwards, characterized in that for fixing the clamping spring ( 17 . 17a ) on the key body ( 11 . 11a ) on the clamping spring ( 17 . 17a ) an inwardly projecting fixative ( 18 . 18a ) is arranged, with which the clamping spring ( 17 . 17a ) in a corresponding recess ( 16 ) on the key body ( 11 . 11a ) intervenes. Socket spanner according to claim 1, characterized in that the inwardly projecting fixing means a radially inwardly angled finger ( 18 ) or an inwardly projecting pin or a radially inwardly projecting formation ( 18a ). Socket spanner according to claim 1 or 2, characterized in that the radial recess as a first radial bore ( 16 . 16a ) in the key body ( 11 . 11a ) is trained. Socket spanner according to one of claims 1 to 3, characterized in that the clamping spring ( 17 . 17a ) is interrupted in the circumferential direction and the interruption has an opening angle (w2) in the range of 20 ° to 120 °, in particular from about 30 ° to about 80 °. Socket spanner according to one of claims 1 to 4, characterized in that the clamping spring ( 17 . 17a ) in a circumferential groove ( 13 ) which is concentric with the first receptacle ( 14 ) on the key body ( 11 . 11a ) is trained. Socket spanner according to claim 3, characterized in that for the storage of the clamping element, a second radial bore ( 15 ) in the key body ( 11 . 11a ) is provided, and that the first radial bore ( 15 ) and the second radial bore ( 16 . 16a ) in the circumferential direction at an angular distance (w1), which is preferably about 90 ° to about 180 °.