DE202007011549U1 - hand tool - Google Patents

Abstract

A hand tool comprising a main body (10) comprising a driving part (20) and an operating part (30), wherein
the actuating part (30) is formed by two levers which are hinged together and each contain a handle (31) and a jaw (32),
the drive part (20) forms a receiving space (21), the inner wall of which has a plurality of quadrangular grooves (213), arcuate grooves (212) curved surfaces (211)
a higher grip force can be achieved.

Description

technical area

The The invention relates to a hand tool having a drive part, having a profiled receiving space for a workpiece, through which increases the grip force can be.

State of technology

9 shows a conventional sprocket ( 50 ) of a ratchet wrench having a hexagonal receiving space ( 51 ) for a workpiece whose inner wall has six convex surfaces ( 51 ), between each of which a groove ( 52 ) is formed. Because of the convex surfaces ( 51 ) this sprocket can only turn a smaller hexagonal screw.

In addition, the workpiece through the convex surfaces ( 51 ) to be damaged. In addition, the grip force is due to the six convex surface ( 51 ) very low.

Task of invention

Of the Invention has for its object to provide a hand tool, having a drive part having a profiled receiving space for a workpiece has, by which the gripping force can be increased.

These Task is solved by the hand tool according to the invention, the from a main body consisting of a drive part and an actuating part, wherein the actuating part formed by two levers which are hinged together are and each contains a handle and a jaw, and where the drive part forms a receiving space, the inner wall six quadrangular grooves, six arcuate Has grooves and twelve curved surfaces, causing a higher Gripping force can be achieved.

At the Turning a larger hexagonal screw The six edges of the screw protrude into the quadrangular grooves, thereby arise twelve contact surfaces, so that the grip strength increases becomes. When turning a smaller hexagonal screw, it can in the arched Grooves protrude. He can grasp a round object, such as a pipe to the outside arched arched surfaces abut, causing damage of the object is avoided.

Short description the drawings

1 a plan of the invention,

2 a perspective view of the invention,

3 a representation of the drive part of the invention in the closed state,

4 a representation of the drive part of the invention in the open state,

5 a representation of the invention when gripping a seckskantigen object,

6 a representation of the invention when gripping a round object,

7 and 8th Representations of the application of the invention to an adjustable wrench,

9 a representation of the conventional solution.

Ways to execute the invention

Like from the 1 to 4 is apparent, the invention consists of a main body ( 10 ), which in the present embodiment is a water pipe pliers and a drive part ( 20 ) and an actuating part ( 30 ).

The actuating part ( 30 ) is formed by two levers which are hinged together and each have a handle ( 31 ) and a cheek ( 32 ) contain. The handles ( 31 ) can be operated by the user. The cheeks ( 32 ) can from the handles ( 31 ) are opened and closed. The two levers are over a bolt ( 33 ), which is attached to a lever. The other lever has at the point of articulation a plurality of positioning holes ( 34 ), which are connected to each other, in which the bolt ( 33 ) can be positioned so that the size of the drive part ( 20 ) can be adjusted.

The drive part ( 20 ) is by a hexagonal mouth of the jaws ( 32 ) and contains the clamping surfaces ( 22 ) and the contact surfaces ( 23 ) of the cheeks ( 32 ). The clamping surfaces ( 22 ) can be controlled by the actuating part ( 30 ) are brought together and apart and serve to clamp an object. The contact surfaces ( 23 ) are structured and serve to hold the object. if the drive part ( 20 ) is closed, it forms a receiving space ( 21 ), whose inner wall has six quadrilateral grooves ( 213 ) and six arcuate grooves ( 212 ) between the quadrilateral grooves ( 213 ) having. Between the square and arcuate grooves ( 213 ) 212 ) are twelve curved surfaces ( 211 ) intended.

Like from the 5 and 6 it can be seen when turning a larger hexagonal screw ( 40 ) the corners of the screw ( 40 ) into the quadrilateral grooves ( 213 ), resulting in twelve contact surfaces, so that the grip force is increased. Therefore, by turning the operating part ( 30 ) the screw ( 40 ) or loosen. When turning a smaller hexagonal screw ( 40 ) can enter the arcuate grooves ( 212 ) protrude. For gripping a round object, such as pipe, the drive part ( 20 ) by the actuation of the actuating part ( 20 ) to open the object in the receiving space ( 21 ) to enclose. In this case, the tube on the curved outward arch surfaces ( 211 ), so that damage to the object is avoided.

The invention can also be applied to an adjustable wrench, as in the 7 and 8th is shown, or a fork wrench can be applied.

The The above description represents only the preferred embodiments of the invention and should not be used as a definition of boundaries and the scope of the invention, the NEN. All equivalent changes and modifications are included to the scope of this invention.

Claims (8)

Hand tool consisting of a main body ( 10 ), which has a drive part ( 20 ) and an actuating part ( 30 ), wherein the actuating part ( 30 ) is formed by two levers which are hinged together and each having a handle ( 31 ) and a cheek ( 32 ), the drive part ( 20 ) a recording room ( 21 ) whose inner wall has a plurality of quadrangular grooves ( 213 ), arcuate grooves ( 212 ) Curved surfaces ( 211 ), whereby a higher gripping force can be achieved. Hand tool according to claim 1, characterized by six square grooves ( 213 ) into which the edges of a larger hexagonal screw ( 40 ) can protrude. Hand tool according to claim 1 or 2, characterized by six arcuate grooves ( 212 ) into which the edges of a smaller hexagonal screw ( 40 ) can protrude. Hand tool according to claim 1 or 2, characterized by twelve curved surfaces ( 211 ). Hand tool according to claim 3, characterized by twelve curved surfaces ( 211 ). Hand tool according to claim 1 or 2, characterized in that the drive part ( 20 ) by the actuation of the actuating part ( 20 ) can be opened and closed. Hand tool according to claim 3, characterized in that the drive part ( 20 ) by the actuation of the actuating part ( 20 ) can be opened and closed. Hand tool according to claim 1 or 2, characterized in that the main body ( 10 ) is a water pipe pliers.