TW201410401A - Torque tool with overload protection - Google Patents

Abstract

This invention relates to a torque tool (1) that is capable of screw fastening with the specified torque, wherein the torque tool (1) has overload protection. When the torque of the torque tool is over the specified target torque, the overload protection function will be activated and an optical or acoustic signal will be issued to inform the assembly personnel who uses the torque tool that the screw fastening is overly tightened.

Description

Torque tool with overload protection

The present invention relates to a torque tool having the features of claim 1 of the patent application, the use of which is to apply a predetermined torque to the screw connection.

Connect two different components via form fit Together they belong to known prior art. One common technique is a screw connection in which the screw connection is formed by a bolt, such as screwing two members directly into one thread or locking the threads via a nut or other locking member. In some complex technical applications (such as locking the cylindrical head of an internal combustion engine), the torque acting on the screw connection must be adjusted very accurately. Moreover, this torque must be properly maintained so as to avoid damage to the threads on the one hand and to avoid damage to the gasket (if any) placed between the components or the screw connection on the other hand.

In order to produce the correct torque, the prior art torque tool (also known as the torque wrench) can set the rated torque (also called the target torque) to be achieved beforehand, and then use this torque to lock the screw connection. When the target torque is reached, an operating mechanism within the torque tool will flip and give a tactile and/or audible return to the assembler using the torque tool The member knows that the target torque required to lock the screw connection has been reached. However, due to the responsiveness of the person, the force used by the assembler to lock the screw connection often over-tightens the screw, that is, the screw connection is locked with a torque greater than the target torque.

In order to avoid this, the prior art has proposed a torque tool with overload protection. For example, the torque tool proposed in EP 2 420 357 A1. To this end, a so-called ratchet head is supported via a cam, so that the torque for locking is transmitted to the ratchet head via the cam. However, this can cause a lot of wear and tear. Therefore, for professionals who use this torque tool many times a day, it is necessary to frequently check or replace the new torque tool to maintain high accuracy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a torsion tool capable of setting a target torsion force for use with a locking screw connection and having an overload protection, and such a torsion tool also has the advantages of simple construction and no wear.

This can be achieved by using a torsion tool having the features of the first item of the patent application.

The contents of the affiliated patent application are various advantageous embodiments of the invention.

The torsion tool of the present invention is capable of locking a screw connection with a predetermined torsion, having an elongated tubular casing having a handle means on the rear end of the casing in which a target torque can be set while also having an extension or a head for coupling a socket wrench, the head being constituted by a rotatable rotor, wherein the rotating shaft of the rotor is spaced apart from the central longitudinal axis of the outer casing, and the rotor is coupled via a coupling rod and a a force mechanism coupling disposed in a longitudinal direction of the outer casing, the torsion tool being characterized by: a sliding member disposed between the rotor and the force mechanism in the outer casing, wherein the torque tool transmits the pulling force through the coupling rod through the rotating rotor Transfer to the slider, wherein the slider is axially moved within the housing in the direction of the rotor, while the force mechanism is tensioned by the tie rod, the slider being placed in a rest position such that a movable joint between the rotor and the coupling rod is Axially located behind the maximum deflection point, wherein the torsion tool moves the rotating joint in the direction of the maximum deflection point through the rotation of the rotor, and reaches the target torque when the maximum deflection point is reached, wherein the rotation is continued when the maximum deflection point is exceeded. The torque of the rotor acting on the screw connection will remain the same or become smaller.

The specified torque value is the value of the torque that should be applied to the screw connection. Therefore, the specified torque value is the target torque value generated by the torque wrench. A commercially available torsion tool sends a release signal when the target torque is reached, which informs the assembler that the target torque has been reached and that the screw connection is at least locked by the specified torque value.

In order not to lock the screw connection by a torque value greater than a specified torque value, the torque tool of the present invention has an overload protection. According to the invention, the overload protection consists of a rotatable rotor arranged at the head end of the torsion tool. In addition, the coupling of the rotor to a ratcheting ratchet head or drive square causes the rotor to also be coupled to an extension or socket wrench (also referred to as a nut) to form a coupling that transmits torque with the screw connection.

The overload protection is constituted by a force mechanism disposed in or on the outer casing, in particular by a spring (preferably a compression spring), and the force mechanism also has a tone capable of adjusting the target torque. The whole device. The force mechanism is coupled to the rotatable rotor via a coupling rod. When the screw connection is locked, the force of the hand of the assembler is transmitted to the force mechanism via the outer casing rod of the lever and/or the torque tool, and then transmitted from the force mechanism to the rotatable rotor via the coupling rod. During the locking of the screw connection, the rotor first stays in a fixed position. When the torque of the lock screw is close to the target torque, the rotor will start to rotate until the target torque is reached. At this time, the force mechanism will be loosened, and the rotor will produce a relative movement to the head and/or the torque tool. It won't be locked tighter. Alternatively, the rotor will rotate at the beginning of the locking process until the target torque is reached. When the target torque is reached, the rotor will perform further rotation as an overload protection so that there is no greater torque than the target. Torque will tighten the screw connection lock.

In order to perform the overload protection movement through the rotation of the rotor and the force mechanism, the rotating shaft of the rotor is disposed at an eccentric position spaced apart from the intermediate longitudinal axis of the outer casing, wherein the intermediate longitudinal axis and the rotating shaft are orthogonal to each other. This allows the coupling rod to be coupled to a movable joint on the rotor while the rotor can be rotated at least half a turn, wherein the coupling rod can pass from the side through the shaft.

The housing has a slider therein, wherein the slider is coupled to the rotor via a coupling rod that is axially movable within the housing as the rotor rotates. According to the invention, therefore, the rotor is coupled to a terminal of the coupling rod via a movable joint, wherein on the other end of the coupling rod, the coupling rod is preferably coupled to the slider via a movable joint. Through the rotation of the rotor, the position of the coupling rod in the outer casing can be relatively moved, wherein the coupling rod is located at the opposite end of the rotor and coupled with the sliding member The way is to use the slider as a sliding bearing while the slider can move axially within the housing.

According to the invention, the slider is also coupled to the force mechanism so that when the rotor is moved by rotation, this rotation is transmitted to the force mechanism via the coupling rod and the slider, and vice versa.

According to the invention, there is a ratcheting ratchet head on the rotor, in particular a drive square, wherein the ratchet head is preferably switchable. Compared with the general torque tools on the market, the torsion tool of the present invention cannot lock the screw connection through rotation (especially the ratcheting rotation of the rotor), but can not be moved on the rotor or via a ratchet mechanism. The drive square or other coupling attachment is coupled to an extension or nut. The turning action is performed via coupling between the rotor and the drive square that cannot move in at least one direction. In order to enable the torsion tool to be used in both locking directions, that is to say for left-handed and right-handed threads, the drive square is coupled to the rotor in a switchable or pluggable manner. In this way, when the left-hand thread is locked, the driving square provided in the rotor or on the rotor can be switched or reversed to the opposite direction to lock the right-hand thread.

The rotor is rotatably disposed within the rotor housing, wherein the rotor housing forms the terminal end of the head end of the torsion tool of the present invention. In order to achieve high precision and the wear-free requirements of the invention (and without sacrificing accuracy), the rotor itself is rotatably disposed within the rotor housing via a plain bearing and/or a rolling bearing.

The force mechanism is composed of a compression spring and a pull rod, wherein the target torque can be adjusted by tensioning the compression spring with the adjusting device, and the sliding member is made on an end stop in the outer casing. It is the bearing seat for the compression spring. Thus, when adjusting the target torque, the torque tool is in a rest position with the slider abutting against an end stop in the housing. The adjusting device is constituted by a tensioning device, so that the compression spring is pulled when the target torque is adjusted by the adjusting device. This allows the compression spring to be pretensioned to the target torque between the end stop of the housing and the adjustment device (especially an adjustment screw). The hand is then rotated by the torque tool so that the screw connection is subjected to a torsional force, in which case the rotor will rotate within the rotor casing, where the force is transmitted to the coupling rod coupled to the slider. At the same time, the pull rod of the force mechanism is located in the sliding member, so a pulling force is transmitted to the compression spring through the axial movement of the sliding member. The pressure of the compression spring and the pre-stress set for the target torque will oppose the locking torque. Therefore, through the locking device, the torque device can be rotated by the hand force to read the current torque, and according to the target torque that is still reached, the torque tool is rotated with a larger hand force to further tighten the screw connection.

Since there is an eccentric displacement between the rotating shaft of the rotor and the intermediate longitudinal axis of the outer casing, a force arm is formed, which causes the force arm to transmit different forces due to the coupling of the coupling rod and the rotor via the movable joint and the rotation of the rotor itself.

According to the present invention, the eccentric displacement between the rotating shaft of the rotor and the intermediate longitudinal axis of the outer casing allows the orthogonal distance of the center point of the movable joint to the intermediate longitudinal axis of the outer casing to a maximum distance, provided that both the center point and the rotating shaft of the movable joint are Located on a normal line where the normal is orthogonal to the medial longitudinal axis of the outer casing. Therefore, when there is rotational movement in both directions, the torque transmitted to the coupling rod via the rotation of the rotor is always smaller than the torque transmitted during the maximum deflection.

According to the invention, the compression springs cooperate with the rotational movement from the rest position of the rotor to the maximum deflection to achieve the target torque set via the compression spring at the maximum deflection of the rotor. When the torque tool is turned, the torque is increased at first because the rotor is slightly rotated, so that the compression spring is further pulled through the tie rod. When the movable joint reaches the maximum deflection point due to the rotation of the rotor, the required target torque is achieved due to the pressure of the compression spring.

As the rotor continues to rotate, the helical connection is further locked as the torsion tool continues to rotate, causing the positive axis between the rotor shaft and the movable joint between the rotor and the maximum deflection between the rotor and the coupling rod to be positive to the middle longitudinal axis of the outer casing. The cross distance becomes small, which causes the compression spring to be further pulled, but since the force arm is shortened, the torsion force acting on the screw connection does not become large. Through the dynamic coupling of the rotor and the coupling rod, and the compression spring with the appropriate spring characteristic curve, the torque can be kept constant when the maximum deflection point is exceeded, or the rotor can continue to rotate and shorten the center from the movable joint. The orthogonal distance between the point and the axis of rotation to the center longitudinal axis makes the torque smaller.

In particular, the eccentric displacement between the rotor shaft and the intermediate longitudinal axis of the casing should be less than or equal to the radius of the rotor shaft to the center point of the movable joint.

This ensures that during the maximum deflection, the most likely transmitted torque is applied to the screw connection.

The torsion tool of the present invention preferably has a fine adjustment device, that is, different bores are provided on the rotor, wherein the bores are parallel to the direction of the shaft of the rotor, and the intermediate longitudinal axis of each bore to the shaft The distances are different and the coupling rods can be coupled to different bores to form a movable joint. In the present invention, the bore that is furthest from the axis of rotation of the rotor is preferably such that the coupling rod is maximally deflected and the coupling rod is preferably parallel to the central longitudinal axis of the outer casing. All other drilling causes the rotor end of the coupling rod to be in the direction of the axis of rotation of the rotor.

One feature of the torsion tool of the present invention is that it has an optical display that functions to visualize the desired target torque, particularly by color marking. The housing of the optical display preferably has an opening with a shutter coupled to the slider below the opening. The slider moves axially within the housing through rotation of the rotor and coupling with the slider. Therefore, the shutter will also move, and the shutter will pass through the outer casing, and the corresponding passage on the shutter can be seen from the outside. For example, yellow, green, and red can be displayed via the traffic light function. Yellow can be seen first, which means that the desired target torque has not been reached. The target torque is then achieved by the rotation of the rotor and the maximum deflection. The slider is then moved further axially in the direction of the rotor, in which case a green through opening is preferably provided to enable the assembler to see the opening. When the maximum deflection point is exceeded, the slider can be moved further axially. For example, the degree of locking of the screw connection can be indicated in red by a predetermined degree.

The optical mark displayed on the optical display can also be a numerical value. The value is displayed by the corresponding dynamic coupling and the spring characteristic curve of the selected compression spring. For example, starting from a preset target torque, the vernier function is divided into 10 steps. Show torque. According to the invention, the optical display can also be designed as a handle on the handle end A releasable attachment that is pulled into the handle end via a drawbar by telescopic movement of the compression spring, thus forming an optical display located on the handle end.

An advantageous way is to provide an acoustic torsion display in addition to the optical display, and this acoustic torsion display is also coupled to the slider. According to the invention, such a display may be a shaped inner member in which a ball or other counterpart is urged by the force of the spring force, and the corresponding member passes through the shaped inner surface when the maximum deflection is exceeded or is about to be reached. Being pulled, thus producing a sound signal, in addition to the visual display, this sound signal can also be used to respond to the assembler using the torque tool.

The following description is of other advantages, features and characteristics of the torsion tool of the present invention, and shows an advantageous embodiment of the invention in a schematic view. These schematic diagrams are helpful in understanding the invention.

1‧‧‧Torque Tools

2‧‧‧ Shell

3‧‧‧ Terminal 2

4‧‧‧Handle device

5‧‧‧force institutions

6‧‧‧ lever

7‧‧‧Compressed spring

8‧‧‧Rotor end of tie rod 6

9‧‧‧Sliding parts

10‧‧‧ terminal board

11‧‧‧Rotor end of compression spring 7

12‧‧‧Adjustment device

13‧‧‧ screws

14‧‧‧Rotor end of housing 2

15‧‧‧Rotor housing

16‧‧‧Rotor

17‧‧‧ shaft

18‧‧‧ratchet mechanism

19‧‧‧Working square head

20‧‧‧Coupling rod

21‧‧‧Active joints

22‧‧‧The middle longitudinal axis of the outer casing 2

23‧‧‧The normal of the longitudinal axis 2

24‧‧‧Center point of the movable joint 21

25‧‧‧The middle longitudinal axis of the coupling rod 20

26‧‧‧Optical display

27‧‧‧ gap

28‧‧‧ ram

29‧‧‧Small shaded surface

30‧‧‧shadowed

31‧‧‧Black noodles

32‧‧‧Formed surface panels

33‧‧‧ ball

34‧‧‧Helical spring

35‧‧‧ Surface of the formed surface plate 32

36‧‧‧ pit

37‧‧‧ rolling bearings

38‧‧‧Sliding bearings

39‧‧‧Drilling

40‧‧‧Adjustment

41‧‧‧ thread

42‧‧‧ Exterior surface

43‧‧‧ scale

44‧‧‧ vernier scale

Radius of R1‧‧

Radius of R2‧‧

C‧‧‧distance

A‧‧‧distance

B‧‧‧distance

R‧‧‧ relative rotation

A‧‧‧Axial

Z‧‧‧ Rally

Figures 1a to c: A cross-sectional view of the torsion tool of the present invention in a stationary state.

Figures 2a to c: A cross-sectional view of the torsion tool of the present invention after activation of the overload protection.

Figures 3a to c: A cross-sectional view of a torsion tool of the present invention having another force mechanism.

In the drawings, the same or similar components are denoted by the same reference numerals, and the description of the components will not be repeated for the sake of simplicity.

The torsion tool 1 of the present invention shown in Fig. 1 has an elongated tubular casing 2 in which a handle means 4 is provided on the terminal end 3 of the casing 2. The housing 2 has a force mechanism 5 therein, wherein the force mechanism 5 is constituted by a pull rod 6 and a compression spring 7. The rotor end terminal 8 of the tie rod 6 is coupled to the slider 9, wherein the slider 9 is movable in the axial direction within the outer casing 2. The slider 9 is fixed to the end stop 10 in the direction of the compression spring 7, wherein the rotor end terminal 11 of the compression spring 7 is located on the other side of the stopper terminal 10.

The compression spring 7 can be prestressed by an adjustment device, i.e., a screw 13 that can be axially moved axially on the tie rod. Further, on the terminal end 14 of one rotor end of the outer casing 2, there is a rotor casing 15 and a rotatable rotor 16 located in the rotor casing 15. The rotor 16 is rotatable about the rotation shaft 17. On the rotor 16 there is a ratchet mechanism 18 coupled thereto, wherein the ratchet mechanism 18 has a working square 19 coupled to a socket wrench not shown in detail in the drawings.

As shown in Fig. 1b, the torsion tool 1 is brought into contact with the screw so that the torque can be transmitted to the screw connection, and then the handle device 4 is rotated with the force F (acting direction as shown in Fig. 1b) to rotate the rotor 16 around the shaft. 17 moves relative to the rotor housing 151. The rotor 16 is coupled to the movable member 9 via a coupling rod 20, wherein the two ends of the coupling rod 20 respectively form a movable joint 21 coupled to the rotor 16 and/or the slider 9.

Through the relative movement R between the rotor 16 and the rotor casing 15 in Fig. 1b, the tensile force Z is transmitted via the coupling rod 20, thereby causing the slider 9 to start moving in the axial direction A. This axial movement takes place in the direction of the central longitudinal axis 22 of the outer casing 2. Through the slider 9 toward the rotor 16 The axial movement of the direction, and the coupling of the compression spring 7 and the tie rod 6 shown in Fig. 1a, the compression spring 7 is subjected to another pressure due to the axial movement.

The intermediate longitudinal axis 22 of the shaft 17 is spaced apart from the normal 23 of the intermediate longitudinal axis 22 by a distance a. According to the law of leverage, the torque acting on the shaft 17 is converted via a distance a into a tensile force Z transmitted to the tie rod 6 via the coupling rod 20. However, the distance a will vary due to the position of the movable joint 21 shown in Figures 1b and 2b. Therefore, in the rest position in Fig. 1b, the distance a is smaller than a distance not shown in detail in the drawing, that is, less than when the front rotor end movable joint 21 of the coupling rod 20 is located from the intermediate longitudinal axis 22 of the outer casing 2. The distance from the shaft 17 of the rotor 16 when the wire 23 is on. At this point in time P1, this distance reaches its maximum possible deflection. As the rotor 16 continues to rotate, this distance will become smaller, as shown in Figure 2b. Finally, the maximum force arm and the maximum tension are reached when the maximum deflection point described above is exceeded, wherein the maximum deflection point occurs between the shaft 17 of the rotor 16 and the center point 24 of the movable joint 21 at the point in time P1.

A torsion force generated by the torque tool 1 of the present invention locks the screw connection to be locked, which is not depicted in detail in Figs. 2a to 2c, so that the operational state shown in Figs. 2a to 2c is produced. The relative movement Z between the rotor 16 and the rotor casing 15 causes the starting point P0, shown in phantom in Figure 2b, to be locked as the movable joint 21 of Figure 1b passes through position P1 (maximum deflection at this position) until it reaches the position Up to P2, the overload protection has begun to take effect at position P2. According to Fig. 2a, the compression spring 7 is continued to pretension the path b. According to Fig. 2b, since the distance a2 at the position P2 is shorter than the distance a1 at the position P1, via the shaft 17 The torque acting on the screw connection will not continue to rise, but will remain the same or become smaller.

By selecting the appropriate spring characteristic curve to match the dynamic coupling between the front joint 21 of the coupling rod 20 and the resulting distance a, the overlocking of the screw connection to be locked can be avoided. The coupling rod 20 is preferably located at the slider 9 and at a maximum distance a1 at point P1 such that it is parallel to the intermediate longitudinal axis 22 of the outer casing 2. Otherwise the intermediate longitudinal axis 25 of the coupling rod 20 is preferably at an angle to the intermediate longitudinal axis 22 of the outer casing.

According to the invention, the torsion tool 1 also has an optical display 26 whose function is to visually inform the assembler using the torsion tool of the position at which the locking process of the screw connection is full. For this purpose, the outer casing 2 has a notch 27 as shown in Figs. 1c and 2c, wherein there is a ram 28 in the outer casing 2, while the ram 28 is coupled to the slider 9 so that the axial movement of the slider 9 can be transmitted to The shutter 28 causes the shutter 28 to also produce the same axial movement. Thus, in the rest position as in Fig. 1c, it can be seen from a small shadow surface 29 on the shutter 28 that the desired target torque has not yet been reached. Next, a larger shaded surface 30 that moves axially into the large window of the notch 27 can be seen, indicating that the target torque has been reached. According to Fig. 2, the torque tool 1 is located at a position where the overload protection has begun to function, and a black surface 31 can be seen from the notch 27, so that the assembler can know that he has locked the screw connection too tightly with excessive torque. Therefore, overload protection has worked.

Figures 1a and 2a show an audible warning device, i.e., a shaped surface plate 32 disposed within the outer casing 2. Inside the slider 9, there is a ball 33 with a coil spring 34, wherein the ball 33 is shaped The direction of one surface of the surface plate 32 is pressed. If the slider 9 is moved in the axial direction A toward the rotor 16 due to the screw connection not shown in detail in the drawing, the ball 33 will pass over the surface plate as shown in Fig. 2 and slide over the surface. The individual dimples 36 on the surface thus produce a click sound. This signals the assembler that the target connection has been used to lock the screw connection.

As with conventional industrial torque wrenches, in the embodiments shown in Figures 1a-c and 2a-c, the target torque can only be adjusted to a predetermined torque value using a separate display. In other words, the adjustment device formed by the screw 13 can increase or decrease the prestress of the compression spring 7. This target torque can then be checked on a separate display and the target torque can be modified by changing the pre-stress of the compression spring 7 as necessary. Fig. 3a-c shows another embodiment of the torsion tool 1 of the present invention having a structure similar to that of the torsion tool 1 shown in Figs. 1 and 2. The only difference is the design of the rotor 16 and the possibility of adjusting the force mechanism. Similar to Figs. 1 and 2, the rotor 16 has a structure within the rotor casing 15, wherein the structure is rotatably supported on the rolling bearing 37 and the sliding bearing 38. The rotor 16 has different bores 39, each of which can be coupled to the coupling rod 20 and constitute a movable joint 21. According to the invention, the different bores 39 are at different distances from the axis of rotation 17, each of which has a radius, two different radii R1 and R2 shown in the figures, wherein R2 is greater than R1. Therefore, the distance c of the movable joint 21 to the rotating shaft 17 will be different from each other, especially when the position P1 reaches the maximum deflection point, so that the coupling rod 20 can generate different deflections, which makes the first The sub-assembly of the torsion tool 1 of the present invention has an adjustment possibility, for example, a half Nm or a Nm fine adjustment can be achieved.

Furthermore, the torsion tool 1 as shown in Figures 3a-c has another adjustment at the handle end of the handle device 4, i.e., through an adjustment member 40 coupled to the tie rod 6 via the thread 41. The rotation adjustment member 40 can be tensioned. The spring 7 is compressed to adjust the target torque. The outer surface 42 of the adjusting member 40 has a scale 43 for adjusting the target torque. In addition, the housing 2 has a vernier scale 44 that makes a micro-call of the target torque. According to Fig. 3c, when the torsion tool 1 is operated, the adjustment member 40 is pulled into the outer casing 2 in the axial direction A. As can be seen from Fig. 3c, the overload protection of the torque tool 1 has begun to function.

9‧‧‧ shaft

15‧‧‧The normal of the longitudinal axis 2

16‧‧‧Center point of the movable joint 21

17‧‧‧The middle longitudinal axis of the coupling rod 20

20‧‧‧ ram

21‧‧‧Active joints

22‧‧‧The middle longitudinal axis of the outer casing 2

25‧‧‧The middle longitudinal axis of the coupling rod 20

28‧‧‧ ram

Claims (11)

A torque tool (1) capable of locking a screw connection with a predetermined torsion, having an elongated tubular casing (2) and having a handle device (4) on the tail end (3) of the casing (2), Wherein a target torque can be set, and the torque tool (1) further has a head coupled to the extension or the socket wrench, the head being constituted by a rotatable rotor (16), wherein the rotor (16) The rotating shaft (17) is spaced apart from the intermediate longitudinal axis (22) of the outer casing (2) by a distance (a), and the rotor (16) is disposed in a longitudinal direction of the outer casing (2) via a coupling rod (20) a force mechanism coupling, characterized in that: a sliding member (9) is disposed between the rotor (16) and the force mechanism in the outer casing (2), wherein the torque tool (1) transmits and rotates the rotor (16) transmitting a pulling force to the slider (9) via the coupling rod (20), wherein the slider (9) is axially moved within the housing (2) in the direction of the rotor (16) while The force mechanism is tensioned by the tie rod (6), and the slide member (9) is placed in a rest position such that a movable joint (21) between the rotor (16) and the coupling rod (20) is axially (A) )on Located behind the maximum deflection point, wherein the torsion tool (1) moves the rotating joint in the direction of the maximum deflection point through the rotation of the rotor (16), and reaches the target torque when the maximum deflection point is reached, wherein the maximum torque is exceeded. At the point of deflection, the rotor (16) continues to rotate, and the torque acting on the screw connection will remain constant or small. A torsion tool according to claim 1, wherein a ratchet type ratchet head, in particular a driving square head (19), is arranged on the rotor (16). A torsion tool according to claim 1 or 2, wherein a ratchet type ratchet head is provided on the rotor (16), and the ratchet head is preferably switchable. A torsion tool according to any one of claims 1 to 3, wherein the rotor (16) is rotatably disposed within the rotor casing (15), in particular via a plain bearing and/or a rolling bearing Rotatingly disposed within the rotor housing (15), wherein the shaft (17) of the rotor (16) is disposed at a distance from the intermediate longitudinal axis (22) of the housing (2) (a) An eccentric position in which the intermediate longitudinal axis (22) and the rotating shaft (26) are orthogonal to each other. A torsion tool according to any one of claims 1 to 4, wherein the slider (9) is coupled to the force mechanism (5). The torque tool of any one of claims 1 to 5, wherein the force mechanism (5) is composed of a compression spring (7) and the tie rod (6), wherein the tension can be adjusted by tensioning The compression spring (7) of the device adjusts the target torque while the slider (9) acts as a support for the compression spring (7) on an end stop (10) in the housing (2). The torque tool of any one of claims 1 to 6, wherein the displacement between the shaft (17) of the rotor (16) and the intermediate longitudinal axis (22) of the outer casing (2) is less than or It is equal to the radius of the rotation point of the rotating shaft (17) of the rotor (16) to the movable joint (21). A torsion tool according to any one of claims 1 to 7, wherein the rotor (16) has a bore parallel to the direction of the shaft (17) of the rotor (16), wherein each borehole Intermediate longitudinal axis to the shaft (17) The distances are different from one another, and the coupling rod (20) can be coupled to different bores to form the movable joint (21). The torque tool of any one of claims 1 to 8, wherein the optical display (26) has a function of visually displaying that the target torque has been reached, in particular The color is displayed. A torque tool according to claim 9, wherein the optical display (26) is coupled to the slider (9), wherein a rising torque is first displayed, then the target torque is reached, and when the target torque is exceeded Displays a signal that exceeds the target torque. A torsion tool according to any one of claims 1 to 10, wherein there is an acoustic torsion display, wherein the acoustic torsion display is coupled to the slider (9).