EP1958736A1 - Spanner with adjustable hinges - Google Patents

Abstract

The spanner (10) has a lever arm (12) having an operating grasp (14). An actuator (16) is provided at another end of the lever arm and a joint (18), tiltable around an axis (20) is arranged between the lever arm and actuator. A bolting device tooth (32) reaches into the teeth (30) of the actuator for locking and is induced to unlock from the teeth. A U-shaped shaped part (34) positively embraces the locking end of the lever arm. The U-shaped shaped part is adjustable for unblocking against a spring (36). The spring is arranged between the U-shaped shaped part and the end of the lever arm.

Description

Technical area

1. a) einen Hebelarm, an dessen einem Ende ein Betätigungsgriff vorgesehen ist,
2. b) ein Betätigungskopf am anderen Ende des Hebelarms,
3. c) ein um eine Achse schwenkbares Gelenk, welches zwischen Hebelarm und Betätigungskopf angeordnet ist,
4. d) der Betätigungskopf eine Verzahnung als Teil eines Arretiermechanismus für das Gelenk aufweist,
5. e) wenigstens ein Verriegelungszahn, welcher in die Verzahnung des Betätigungskopfes zur Arretierung greift und zum Entriegeln der Arretierung aus der Verzahnung bewegt wird,
6. f) ein u-förmiges Formteil zum Entriegeln der Arretierung, an dessen Stirnseite der Verriegelungszahn zur Arretierung angeordnet ist.

The invention relates to an actuating tool for tightening and / or loosening screw connections, comprising:

1. a) a lever arm, at one end of which an actuating handle is provided,
2. b) an actuating head at the other end of the lever arm,
3. c) a pivotable about an axis joint, which is arranged between the lever arm and the actuating head,
4. d) the actuating head has a toothing as part of a locking mechanism for the joint,
5. e) at least one locking tooth, which engages in the toothing of the actuating head for locking and is moved to unlock the locking of the toothing,
6. f) a U-shaped molding for unlocking the lock, on the front side of the locking tooth is arranged for locking.

State of the art

Operating tools for tightening and / or loosening of screw usually consist of an actuating head, which is firmly and immovably connected to a lever arm. About the lever arm, a user can apply a torque on the actuating head for tightening or loosening screw connection. However, a use of such actuation tools is limited because at the place of a screwing sufficient workplace for the application of the operating tool must be present.

In order to carry out a screwing even with limited work, various actuation tools with a relative to the lever arm pivotal actuating head are known. By pivoting the actuating head adaptation of the operating tool to the limited workplace is possible. A provided for pivoting joint is locked in the known operating tools by a locking mechanism in a desired position. These are either permanently lockable or not lockable locks used. In the non-lockable locking a pivoting of the actuating head is made in different positions with a certain force.

A disadvantage of the known actuating tools with a lockable locking is the complex construction of the locking mechanism with many, sometimes complicated components. This is especially true for locking mechanisms with a tubular lever arm, in which the mechanism is carried out to the handle and thus unlocking or locking the handle is possible. Such locking mechanisms cause high production costs and are susceptible to wear. Furthermore, in other locking mechanisms Entriegelungselemente far and thus hinder a screwing or are thereby inadvertently operated or damaged. In the known operating tools with non-lockable detents disadvantageous during a screwing unintentional pivoting of the actuating head is possible.

In the publication DE 20 2006 010 564 U1 a wrench is described with a key head hinged to a key arm. The key head has a toothed, arcuate surface into which a toothed segment provided on the upper side of a U-shaped control element can engage. The control is positioned to lock the key head by two positioning elements so that the sector gear engages the toothed surface. The bottom of the control has an arc surface. To change the position of the key head, a user pivots the control member along the arc surface and against the positioning members away from the key head. A disadvantage of this locking mechanism is that the control is tilted upon actuation by the user. As a result, dirt can penetrate into the interstices of the locking mechanism and affect the functionality or cause damage or destruction of the mechanism.

Disclosure of the invention

The object of the invention is therefore to avoid the disadvantages of the prior art and to provide a simply constructed and securely locking locking mechanism.

• g) das u-förmige Formteil zum Entriegeln der Arretierung das eine Ende des Hebelarms formschlüssig umgreift, wobei das u-förmige Formteil zur Entriegelung gegen eine Feder verschiebbar ausgestaltet ist und wobei die Feder zwischen dem u-förmigen Formteil und dem Ende des Hebelarms angeordnet ist.

According to the invention the object is achieved in an actuating tool for tightening and / or loosening screw connections of the type mentioned above in that:

• g) the U-shaped molding for unlocking the lock which engages one end of the lever arm positively, wherein the U-shaped molding is designed to be unlocked against a spring displaceable and wherein the spring between the U-shaped molding and the end of the lever arm is arranged ,

The invention is based on the principle of providing a U-shaped molded part and a spring at a joint between an actuating head and a lever arm of the actuating tool for locking. The molding is positively guided by the trained as a joint, for example forked end of the lever arm. The fitting has at its end face at least one locking tooth, which engages for locking in a toothing of the actuating head. By provided between the lever arm and fitting spring, the fitting is pressed with the locking tooth to the actuating head. A user can lift the locking of the actuating head by moving the fitting against the spring and away from the actuating head. In this case, the locking tooth is moved out of the toothing of the actuating head.

Due to the uncomplicated structure of the locking of the actuating tool according to the invention, this can be produced particularly inexpensively. Furthermore, the U-shaped fitting fits tightly against the lever arm. As a result, a flat design can be realized, which makes it possible to use the tool even in cramped conditions. Advantageously, the legs or lobes of the U-shaped fitting can be completely or partially submerged in a groove of the lever. They then take up no additional space during assembly with this operating tool. In addition, unintentional release of the lock or damage during a screwing operation is avoided by the flat design. With the positive engagement of the fitting on the lever arm, even during an operation further contamination of the lock is effectively prevented.

As an advantageous embodiment of the actuating tool according to the invention for tightening and / or loosening screw has been found when the teeth of the Arretiermechanismusses is provided in a ring around the axis of the pivotable joint on the actuating head. With such a crown-shaped teeth engages a locking tooth equally well in each tooth space of the toothing and thus allows a secure locking of the actuating head in many different positions to the lever arm.

The annular toothing of the Arretiermechanismusses sweeps in an embodiment of the invention an angle of at least 150 °. This has the advantage that the actuating head can be pivoted relative to the lever arm to both sides by at least 75 °. The actuating tool according to the invention is thereby optimally adaptable to a limited working range of a screw connection and can be used in many ways.

In a preferred embodiment of the actuating tool according to the invention for tightening and / or loosening screw connections, the angle of the tooth gaps of the toothing is between 10 ° and 30 °. At such an angle self locking of the lock becomes effective, i. H. When loaded, the locking tooth is not pressed out of the toothing, but securely held by the toothing. This achieves a very uncomplicated and effective locking of the actuating head and prevents an independent unlocking of the lock.

In a further advantageous embodiment of the actuating tool according to the invention for tightening and / or for loosening screw the actuating head is designed as a plug-in or Aufsteckwerkzeug. The actuator head is so universally applicable, for example, by attaching or plugging a bit holder, in turn, the bits can be inserted, a jaw or wrench or other socket wrench for a variety of different screws or nuts.

Furthermore, in a preferred embodiment of the invention, a ratchet mechanism is arranged in the actuating head. A ratchet mechanism transmits an applied torque in one direction of rotation and, in the other direction of rotation, allows free rotation of the lever arm without torque transmission. Thus, a conversion of the actuating tool is avoided during a screwing operation. A screw connection is much faster and easier for a user.

Preferably, the actuating head is designed as a ring spanner, open-end wrench or as an inner or outer polygon. This allows the operating tool with equip and use standardized tools. It is therefore basically easy to implement for any comparable tool variant and can be used during assembly.

A particularly preferred variant of the actuating tool results when the spring is wholly or partially provided in a bore of the lever arm. By this measure is achieved in particular that the spring is not dirty. Small particles, for example, can not sit in the turns of a coil spring and affect the function of the spring. In addition, the spring is guided in the bore and is largely protected by the bore.

An advantageous embodiment of the actuating tool according to the invention further consists in that the locking tooth or the U-shaped molded part has a pin which is inserted into the bore and spring-loaded with the spring. By this measure, the lock receives an additional guide, which additionally stabilizes the locking mechanism of the tool in addition to the U-shaped molding.

Further embodiments and advantages will become apparent from the subject of the dependent claims, as well as the drawings with the accompanying descriptions.

Two embodiments of the invention are explained below with reference to the accompanying drawings.

Short description of the drawing

Fig. 1

shows a side view of a first embodiment of an actuating tool for tightening and / or loosening screw, which is designed as a ratchet tool with a lockable joint.

Fig. 2

shows the embodiment of a trained as a ratchet tool operating tool according to Fig. 1 in a supervision.

Fig. 3

shows a second embodiment of an actuating tool with a lockable joint and a receptacle for changing tools with a ratchet head in a side view.

Fig. 4

shows the embodiment of an operating tool with a receptacle for changing tools and a ratchet head Fig. 3 in a supervision.

Fig.5 5

shows an embodiment of an operating tool with a receptacle for changing tools and a ring spanner insert accordingly Fig. 3 in a supervision.

Fig. 6

shows the embodiment of an operating tool with a receptacle for changing tools and a ring spanner insert after Fig. 5 in a side view.

Fig.7. 7

shows a side view of an embodiment of an operating tool according to Fig. 1 wherein a locking tooth has a spring-loaded pin which engages in a bore.

Preferred embodiment

In Fig. 1 By way of example and not limitation, a ratchet tool 10 is shown as an operating tool for tightening or loosening screw connections. The ratchet tool 10 has a lever arm 12 with a Betätigungsgriffl 4 and a Betätigungskopfl 6. The Betätigungskopfl 6 is connected via a hinge 18 with an axis 20 pivotally connected to the lever arm 12 and is locked or unlocked by a locking mechanism 22. In Fig. 1 For reasons of illustration, the actuating head 16 is shown locked in three different angular positions relative to the lever arm 12.

The actuating head 16 includes a square coupling 24 for coupling various plug-in tools, which are selected depending on the screw connection. Furthermore, the actuating head 16 includes a ratchet joint 26 for transmitting a torque to the square coupling 24 in a rotational direction and release of the square coupling 24 in the other direction of rotation. With a switching element 28, the direction of rotation is set, in which a torque is transmitted.

At the articulation 18 designed part of the actuating head 16, a crown-shaped toothing 30 is provided, which sweeps in the embodiment described here, an angle of 180 °. In further embodiments, an angle of more than 180 ° and / or a non-annular toothing 30 are provided. In the coronal toothing 30 engages a locking tooth 32 for locking. Alternatively, several locking teeth are possible. The locking tooth 32 is arranged on the front side of a U-shaped molding 34. The U-shaped molding 34 is positively guided by the hinge 18 formed to the end of the lever arm 12. As a result, the U-shaped shaped part 34 is supported by its legs on the lever arm 12 for locking. With a spring 36 between the lever arm 12 and the mold part 34, the mold part 34 is held with the locking tooth 32 to the actuating head 16. At this time, the operation head 16 is locked by engaging the lock tooth 32 in the teeth 30.

By a tooth gap or tooth tip angle of 10 ° to 30 ° in the locking tooth 32 and the toothing 30, a self-locking is achieved. As a result, the locking tooth 32 is not pressed against the spring 36 from the toothing 32 during a load, but remains in the toothing 32 and locks the actuating head 16 securely in a set position.

To set a particular angular position between the actuating head 16 and the lever arm 12, a user actuates the locking mechanism 22 by displacing the U-shaped fitting 34 in the direction of the actuating handle 14 against the spring 36 (arrow 38). In this case, the locking tooth 32 is disengaged from the toothing 30 and releases the actuating head 16. The user selects a desired angular position between actuating head 16 and lever arm 12 during the actuation of the molded piece 34 and then in turn releases the molded part 34. By the spring 36, the molded part 34 is guided to the actuating head 16. The Vereizelungszahn 32 engages the toothing 30 and locks the actuating head 16 safely in the user desired angular position.

Fig. 2 adjusts the operating tool Fig.1 in a top view. The same components are therefore also designated by corresponding reference numerals. The hinge 18 is formed by a bifurcated end of the lever arm 12 into which a part of the actuating head 16 projects. The lever arm 12 and the operating head 6 are pivotally connected to each other by an axle 20 formed as a screw. Alternatively, as an axis, for example, a pressing bolt is possible. The U-shaped molded part 34 is guided in a form-fitting manner in the fork-shaped end of the lever arm 12 and is displaceable in the direction of the actuating handle 14 for unlocking the actuating head 16 (arrow 38).

Fig. 3 to Fig. 6 show a second, similar embodiment of an actuating tool 40 for tightening or loosening screw with different tools and change in different views. As far as the components of the previous embodiment of Fig. 1 and Fig. 2 are identical, identical reference numerals are used. Design and function of the lever arm 12, the hinge 18 and the locking mechanism 22 correspond to those of the first embodiment.

In Fig. 3 a second embodiment of an actuating tool 40 is shown in a side view. A lever arm 12 is connected by a hinge 18 with an actuating head 42. The hinge 18 is lockable with a locking mechanism 22. The locking mechanism 22 corresponds to that of the first embodiment. The actuating head 42 has a tool holder 44 with a securing mechanism 46. A ratchet head 48 is inserted into the tool holder 44. By the securing mechanism 46 of the ratchet head 48 is held securely and easily detachable from the tool holder 44. By means of the joint 18 and the locking mechanism 22, the actuating head 42 can be positioned at different angles to the lever arm 12. In Fig. 3 Three different angular positions of the actuating head 42 are shown.

Fig. 4 shows the embodiment according to Fig. 3 in a supervision. Clearly, the U-shaped molding 34 can be seen, which can be moved in the direction of arrow 38. Thereby, the locking mechanism 22 with the locking tooth 32 (s. Fig. 3 ) and the operating head 42 can be pivoted by a user to a desired angle to the lever arm 12.

Fig. 5 illustrates the embodiment Fig. 3 and Fig. 4 with a ring wrench insert 50. The ring wrench insert 50 is also set with the joint 18 and the locking mechanism 22 at different angles to the lever arm 12. The tool holder 44 also allows use of other exchange tools, such. B. an open-end wrench or a usable bit holder.

Fig. 6 shows the embodiment of an operating tool with a lockable joint and a removable head recording Fig. 5 in a side view.

The described locking mechanism 22 is designed to be uncomplicated and secure locking and consists essentially only of a U-shaped molding 34 and a spring 36. This has a correspondingly favorable effect on the production costs. Since the U-shaped fitting 34 fits snugly against the lever arm 12, unintentional release of the lock or damage during a screwing operation is avoided. The operating tool 10 or 40 is universally applicable to a variety of screwing and is particularly suitable for screw connections with limited workspace conditions.

FIG. 7 shows, in a side view, an embodiment of an operating tool, as shown in FIG Fig. 1 is shown. The same components are therefore designated by corresponding reference numerals. Based on Fig. 7 However, another variant of the locking mechanism 22 is described. At the bottom of the locking tooth 32, which faces the lever arm 12, a pin 52 is provided. This pin 52 projects positively into a bore 54 and stabilizes the locking mechanism 22 by this additional guide. The bore 54 is arranged substantially centrally and longitudinally to the lever arm 12. The spring 36 does not engage directly with the locking tooth 32 but with the pin 52. The spring 36 is inserted into the bore 54 for this purpose. As a result, the pin 52 and thus the locking tooth 32 is biased by the spring 36. The locking mechanism 22 can therefore be solved only against this spring force. In this way, the locking mechanism 22 is protected.

LIST OF REFERENCE NUMBERS

10

ratchet tool

12

lever arm

14

operating handle

16

actuating head

18

joint

20

axis

22

locking mechanism

24

Square clutch

26

ratchet joint

28

switching

30

coronal toothing

32

locking tooth

34

U-shaped molding

36

feather

38

arrow

40

operating tool

42

actuating head

44

tool holder

46

safety mechanism

48

ratchet head

50

Wrench head

52

pen

54

drilling

Claims (9)

Operating tool (10, 40) for tightening and / or loosening screw connections containing a) a lever arm (12), at one end of which an actuating handle (14) is provided, b) an actuating head (16, 42) at the other end of the lever arm (12), c) a joint (18) pivotable about an axis (20) and arranged between the lever arm (12) and the actuating head (16, 42), d) the actuating head (16, 42) has a toothing (30) as part of a locking mechanism (22) for the joint (18), e) at least one locking tooth (32) which engages in the toothing (30) of the actuating head (16, 42) for locking and is moved out of the toothing (30) for unlocking the detent, f) a U-shaped shaped part (34) for unlocking the lock, on whose end side the locking tooth (32) is arranged for locking, characterized in that g) the U-shaped shaped part (34) for unlocking the detent which engages around one end of the lever arm (12) in a form-fitting manner, wherein the U-shaped shaped part (34) is displaceably designed for unlocking against a spring (36) and wherein the spring ( 36) between the U-shaped molding (34) and the end of the lever arm (12) is arranged. Actuating tool (10, 40) for tightening and / or loosening screw connections according to claim 1, characterized in that the toothing (30) of the locking mechanism (22) around the axis (20) of the pivotable joint (18) on the actuating head (16 , 42) is provided. Operating tool (10, 40) for tightening and / or loosening screw according to claim 2, characterized in that the annular toothing (30) covers an angle of at least 150 °. Operating tool (10, 40) for tightening and / or loosening screw according to one of claims 2 or 3, characterized in that the angle of the tooth gaps of the toothing (30) is between 10 ° and 30 °. Operating tool (10, 40) for tightening and / or loosening screw according to one of claims 1 to 4, characterized in that the actuating head (16, 42) as a plug-in or Aufsteckwerkzeug (48, 50) is formed. Actuating tool (10, 40) for tightening and / or loosening screw connections according to one of claims 1 to 5, characterized by a ratchet mechanism (26, 48) which is arranged in the actuating head (16, 42). Actuating tool (10, 40) for tightening and / or loosening screw according to one of claims 1 to 6, characterized in that the actuating head (16, 42) is designed as a ring spanner, open-end wrench or as an internal or external polygon. Operating tool (10, 40) for tightening and / or loosening screw connections according to one of claims 1 to 7, characterized in that the spring (36) is provided wholly or partly in a bore (52) of the lever arm (12). Actuating tool (10, 40) for tightening and / or loosening screw connections according to claim 8, characterized in that the locking tooth has a pin (54) which is inserted into the bore (52) and spring-loaded with the spring (36).

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