Torque screwdriver

Abstract

The present invention relates to a torque tool, in particular a torque driver 1, which has a handle 2, an adjustment body 7 for adjusting the rotational torque, which is rotatable about a longitudinal axis L of the handle 2, and a display 3 for the adjusted rotational torque, which display comprises a number roller counting mechanism 10, which has at least two number rollers 11, 12, 13. According to the invention, the number roller counting mechanism 10 is arranged in a hollow cylindrical longitudinal part 14 of the handle 2, which longitudinal part has a viewing window 16 through which the adjusted rotational torque is visible, and the number roller counting mechanism 10 has a through-hole 17 in the central axis ML of the number roller counting mechanism, through which a shaft part 18 is guided and which is supported by a carrier 13 arranged non-rotatably in the handle 2 between the two number rollers 11, 12 or 12, 13. In the embodiment, a carrier disc 30 is integrated on which a switching gear 33 is rotatably assigned, which switching gear has drive toothing 39 and switching toothing 40, the number rollers 11, 12, 13 have an outer number rim 20 which has a first rim part 21 with transmission toothing 22 and a second rim part 23 with a switching element 24, and the adjusting body 7 has means for transmitting a rotational movement of the adjusting body 7 to the number roller 11 arranged on the adjusting body side.

Description

[Technical field]

[0001] The invention relates to a torque tool, in particular a torque driver, according to the features in the preamble of claim 1 . [Background technology]

[0002] Torque tools, such as torque drivers, are manually operated tools by means of which a controlled rotational torque can be applied to workpieces, usually screws or nuts. A predetermined tightening torque can be applied by adjustable torque tools to ensure the required clamping force or assembly preload between the structural members to be joined.

[0003] In torque drivers, the release mechanism is usually accommodated in the handle, in which or at the handle an adjustment device is also provided with a display of the rotation torque to be adjusted. An adjustment mechanism in the handle, usually an adjustment body connected to a threaded spindle, is rotated relative to a fixed part of the handle, whereby the desired rotational torque is adjusted by compression of a compression spring.

[0004] An adjustable torque screwdriver is known from DE 10 200 03 133 A1. The adjusted torque can be read off on a display, which is configured as a scale or as a caliper.

[0005] According to Patent Document 2, a torque wrench with a rotation torque display is considered to be part of the prior art. This torque wrench has a display device for the adjusted rotation torque. This display device includes a dial counting mechanism having a plurality of dials, which are connected via a transmission mechanism. The dials are disposed within a casing that surrounds the outside of the handle. The axial rod of the transmission passes through a gear on one side within the casing. In order to accommodate the dial counting mechanism, the casing must be constructed in two parts: it is made up of an upper cover and a lower cover, which are located opposite each other and are fixed at the handle of the torque wrench. From the standpoint of structural space and functionality, this construction is worth improving. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] U.S. Patent No. 9,421,675 B2 [Patent Document 2] Specification of German Utility Model No. 20 2013 103 740 U1 Summary of the Invention [Problem to be solved by the invention]

[0007] Taking this prior art as a starting point, the object of the present invention is to improve torque tools, in particular torque drivers, in terms of space and use technology as well as functionality. [Means for solving the problem]

[0008] The solution to this problem lies in a torque tool, in particular a torque driver according to claim 1.

[0009] Advantageous embodiments and further configurations of the torque tool (torque driver) according to the invention are the subject of the dependent claims. Effect of the Invention

[0010] The configurations and modifications of the features of the torque tool which, alone or in combination, constitute the technical advantages of the invention, are likewise given by the description and the attached drawings.

[0011] The torque tool according to the invention is in particular a torque driver, which has a handle and an adjustment body for adjusting the rotational torque, which is rotatable about the longitudinal axis of the handle. The adjusted torque or the adjusted value of the torque is displayed via a display and is visible through a sight glass. The display has a dial counting mechanism, which has at least two dials.

[0012] According to the invention, the dial counting mechanism is arranged in a hollow cylindrical longitudinal section of the handle, in which a sight window is provided, through which the adjustment value of the rotation torque is visible, which sight window is formed in the hollow cylindrical longitudinal section by a cutout or a through-opening in the wall of the handle 2. The dial counting mechanism has a through-hole in its central axis, through which a shaft section is guided. A carrier disk is arranged in the handle non-rotatably between the two dials, to which a gearshift wheel is rotatably associated, the gearshift wheel having a drive toothing and a gearshift toothing. The dial comprises an outer numeral rim with numerals, which has a first rim portion with inner transmission teeth and a second rim portion with a switching element. The adjusting body has means for transmitting a rotational movement of this adjusting body to the dial arranged on the adjusting body side.

[0013] The torque tool according to the invention is improved in terms of construction space and use technology as well as functionality. In the torque tool according to the invention, a compact dial counting mechanism with an internally located transmission chain is implemented in the handle. The dial counting mechanism is arranged in the hollow cylindrical longitudinal part of the handle.

[0014] Advantageously, the means for transmitting the rotational movement of the adjusting body and the transmission toothing of the first dial adjacent to this adjusting body, i.e. the dial on the adjusting body side, are in permanent engagement.

[0015] The adjusting body is permanently connected radially to a first dial on the adjusting body side. This is achieved via a driver on the adjusting body and a transmission toothing of this first dial. The first dial provides the lowest adjustment value. Due to the permanent connection, each rotational movement of the adjusting body is transmitted to the first dial. On the opposite side, the first dial is provided with a switching element. This is preferably an internally toothed segment. Between the two dials, i.e. for example between a first dial on the adjusting body side and the next second dial, a carrier disk is provided. The carrier disk has an eccentric axle pin, on which the gearwheel is supported or held. The carrier disk is non-rotatably connected to the handle. For this purpose, the carrier disk has, in particular, radial projections which engage in recess- or slot-shaped receiving sections on the inner circumference of the hollow cylindrical longitudinal section. The shift gear has a drive toothing and a shift toothing. The drive toothing cooperates with the transmission toothing of the dial. The shift toothing cooperates with the shift element of the dial. The shift element located on the side of the drive toothing corresponds to the respective complete 1After rotation, the following dial serves to increase or decrease the value by one numerical value. For this substitution, at least two dials are required. The system can be expanded to only one dial, one carrier disk and one switching gear in each case, in the number technically necessary and available. Since the dials each have one switching element, the complete 1 A rotation causes the subsequent dial to change by only one digit. The number of switching elements determines how often the subsequent dial is further switched during one rotation. The number of switching elements and the number of further switches therefore behave proportionally to each other.

[0016] The invention provides a torque tool, in particular a torque driver, with a display, in which the entire display system with the dial counting mechanism can be pushed as a unit into the handle, from the adjustment body side, into the hollow cylindrical longitudinal part of the handle. The dial counting mechanism or the structural components of the dial counting mechanism are supported against one another. The dial counting mechanism is supported against the handle. This is achieved by the non-rotatable arrangement of the carrier disk in the handle. In the center, a shaft portion is guided through the dial counting mechanism and through a through-hole located on the central axis. This particularly advantageous aspect of the torque tool according to the invention makes it possible to couple or connect structural members on the adjusting body side of the dial counting mechanism with structural members of the torque tool, in particular the rotary torque adjusting mechanism and the adjusting device, arranged on the driven side from the dial counting mechanism.

[0017] In an advantageous embodiment, the carrier disk has a radial projection which projects or engages in a recess in the handle, in which way the counter bearing or reaction bearing of the dial counting mechanism is realized via the carrier disk.

[0018] Furthermore, a particularly advantageous embodiment provides that the adjusting body has a socket with driver elements which are in engagement with the transmission teeth of the dial on the adjusting body side. The driver elements are preferably arranged on the end face of the socket.

[0019] The shaft portion guided through the central through-hole in the dial counting mechanism is advantageously part of an adjustment shaft which is a structural element of the adjustment device, via which adjustment between the adjustment value of the rotational torque indicated by the dial counting mechanism and the release rotational torque can be carried out.

[0020] The dial has a hub and a disc disposed between the hub and the outer number rim.

[0021] The shift gear is supported on a pivot pin which is arranged eccentrically in the carrier disk.

[0022] The carrier disk has a pot-shaped intermediate piece from which a radial disk section extends concentrically around the intermediate piece. The shift gear is arranged in a receiving section of the carrier disk, which receiving section is arranged in the outer peripheral area of ​​the intermediate piece. The disk section has an opening in the area of ​​the receiving section. Through the opening, the change gear protrudes in an area with a drive toothing, so that a partial segment of this drive toothing pointing towards the downstream dial is brought into engagement with the transmission toothing of the downstream dial.

[0023] The switching toothing is connected to the drive toothing at an end side, the drive toothing has a plurality of teeth and the switching toothing has a plurality of switching teeth, the number of the drive teeth being twice as large as the number of the switching teeth. The ratio between the number of drive teeth and the number of switching teeth is 2: 1. The number of drive teeth is therefore twice as large as the number of switching teeth.

[0024] The shift teeth are arranged at an angle to one another on the pitch circle and are in each case perfectly equally oriented relative to the drive teeth. In a shift gear having six drive teeth, this correspondingly has three shift teeth, which are arranged at an angle of 120° to one another.

[0025] A further practically advantageous configuration of the torque tool consists in that the dial has, on the switching element side, a ring-shaped collar which, in the region of the switching element, is provided with a cutout. The ring collar part covers the switching teeth of the switching toothing part except for one switching tooth, each projecting one switching tooth cooperating with a switching element of one dial. Each one has a complete dial 1 After rotation, the protruding tooth is gripped by the switching element. This tooth is rotated further by 120° so that the nearest tooth protrudes against the ring collar. With the further rotation of the tooth by 120°, the subsequent dial is rotated further by one counter.

[0026] While the first dial is driven by the adjusting body to perform a rotational movement, the switching gear is in a complete 1 After the rotation, the switching element of the first dial is brought into engagement with the switching teeth of the switching gear and is held until this switching gear rotates further by a portion of a circular arc corresponding to the repositioning of the dial by only one number. The following dial is therefore switched or rotated further by only one number. While the first dial performs a further rotation, due to the permanent engagement between the drive teeth of the switching gear and the second dial, no rotation of this second dial and any further dials following this second dial is possible. If the second dial does not rotate completely by itself, the second dial is rotated further by a portion of a circular arc corresponding to the repositioning of the dial by only one number. 1 Only when a rotation is performed will the third dial following this second dial be switched by one number position.

[0027] The invention will now be explained in more detail with reference to the drawings. [Brief description of the drawings]

[0028] [Figure 1] 1 is a side view of a torque tool according to the present invention in the form of a torque driver; [Diagram 2] 2 is an illustrative longitudinal cross-sectional view of FIG. 1 taken along line AA. [Diagram 3] 3 is an enlarged view of portion A corresponding to the illustration in FIG. 2. FIG. [Figure 4] FIG. 2 is a perspective view of a handle of the torque tool. [Diagram 5] FIG. 5 is a first cross-sectional view of the handle according to the illustration of FIG. 4; [Figure 6] FIG. 5 is a second cross-sectional view of the handle according to the illustration of FIG. 4; [Figure 7] FIG. 13 is an end view of the handle from the adjustment body side. [Figure 8] FIG. 8 is an enlarged view of detail B of FIG. [Figure 9] FIG. 2 is an exploded view of the structural members of the torque tool. [Figure 10] 10 is an illustrative cross-sectional view of FIG. 9 taken along line AD-AD. [Figure 11] 11 is an illustrative cross-sectional view of FIG. 10 taken along line AG-AG in a perspective view. [Figure 12] 11 is an illustrative cross-sectional view of FIG. 10 taken along line AF-AF in a perspective view. [Figure 13] FIG. 2 is a perspective view of the dial of the dial counting mechanism. [Figure 14] FIG. 2 is a perspective view of an adjustment body of the torque tool. [Figure 15] FIG. 2 is a vertical cross-sectional view of the dial counting mechanism. [Figure 16] 16 is a view of the structural members of the dial counting mechanism, corresponding to that of FIG. 15, pulled apart. [Figure 17] 4 is an illustrative cross-sectional view of FIG. 3 taken along line UU. [Figure 18] FIG. 4 is an illustrative cross-sectional view of FIG. 3 taken along line TT. [Figure 19] FIG. 2 is a perspective view of the structural members of the dial counting mechanism. [Figure 20] FIG. 13 is a view of the structural members of the dial counting mechanism from another perspective. [Figure 21] FIG. 13 is yet another perspective view of the structural members of the dial counting mechanism. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] 1 to 21, a torque tool according to the invention in the form of a torque driver and the structural parts of this torque tool will be described.

[0030] The torque driver 1 has a handle 2 as well as a display part 3 for adjusting the rotation torque and a follower part 4 . An adjustment device 5 for the adjustment of a predefined rotation torque or a defined tightening torque is integrated in the handle 2. The adjustment device 5 comprises an adjustment mechanism, not described in more detail here, by means of which the desired rotation torque is adjusted by compression of a compression spring 6.

[0031] The adjustment device 5 and its adjustment mechanism cooperate with an adjustment body 7 on the handle 2. The adjustment body 7 is rotatable relative to the handle 2 about the longitudinal axis L of the handle 2. By pivoting the adjustment body 7 relative to a fixed part of the handle 2, the rotational torque is adjusted. In order to protect the respectively adjusted torque against unintended adjustment, the adjusting body 7 is fixed by means of a locking element 8 which is actuated via a locking body 9 .

[0032] The follower 4 of the torque driver 1 is arranged on the end side in the handle 2. The follower 4 is designed for the accommodation of exchangeable tool inserts. For the exchangeable accommodation of different tool inserts, the follower 4 is provided with a holding system defined for this purpose.

[0033] The display 3 for the adjusted torque comprises a dial counting mechanism 10 with a number of dials 11, 12, 13 arranged one behind the other. In the embodiment shown here, three dials 11, 12, 13 are provided in total. The dial counting mechanism 10 is arranged in a hollow cylindrical longitudinal section 14 of the handle 2. A wall 15 of the longitudinal section 14 is opened through by a sight window 16. Through the sight window 16, a part of the dial counting mechanism 10 and the adjusted rotation torque are visible.

[0034] The dial counting mechanism 10 has a through-hole 17 at the central axis ML of the dial counting mechanism, through which a shaft portion 18 is guided. The shaft portion 18 is part of an adjustment shaft 19, which is a structural element of the adjustment device, and via this adjustment shaft An adjustment can be made between the adjustment value of the torque indicated by the dial counter mechanism 10 and the release torque.

[0035] The dial counting mechanism 10 and the structural elements of the display 3, which are considered to be part of the dial counting mechanism 10, can be seen individually and in combination, particularly in Figures 13 and 15 to 21.

[0036] The dials 11, 12, 13 have an outer cylindrical numeral rim 20 with numerals. The numeral rim 20 has a first rim part 21 with transmission toothing 22 and a second rim part 23 with a switching element 24. The transmission toothing 22 is arranged circumferentially on the inner periphery of the first rim part 21. The switching element 24 is formed by a single, inwardly toothed, toothed segment. On the side 25 of the dial 11 , 12 , 13 on which the switching element 24 is located, i.e. on the switching element side, the respective dial 11 , 12 , 13 has a ring-shaped collar 26 which, in the area of ​​the switching element 24 , is provided with a cut-out 27 .

[0037] Each dial 11 , 12 , 13 has a hub 28 and a disc body 29 disposed between the hub 28 and the outer numeral rim 20 . Between dials 11 and 12 or between dials 12 and 13, a carrier disk 30 is respectively fitted which is held non-rotatably in handle 2. Carrier disk 30 has a radial projection 31 which engages in a recess 32 in handle 2. By means of a projection 31 which projects into a recess 32, the carrier disk 30 is supported in the handle 2 in a reaction bearing and is held against rotation.

[0038] A shift gear 33 is rotatably assigned to each carrier disk 30. The shift gear 33 is supported on a pivot pin 34 arranged eccentrically in the carrier disk 30. The carrier disk 30 has a pot-shaped intermediate piece 35 with a radial disk portion 36. The shift gear 33 is arranged in a receiving space 37, which is in turn arranged in the outer peripheral region of the intermediate piece 35. In the region of the receiving space 37, the disk part 36 has an opening 38.

[0039] The switching gear 33 has a drive tooth portion 39 and a switching tooth portion 40. The switching tooth portion 40 is connected to the drive tooth portion 39 at an end face side. The drive tooth portion 39 has a plurality of drive teeth 41. The switching tooth portion 40 has a plurality of switching teeth 42. The number of drive teeth 41 is twice as large as the number of switching teeth 42. In the illustrated example, a total of three switching teeth 42 are provided, which are arranged at an angle of 120° to one another on the pitch circle. Each switching tooth 42 is perfectly equally oriented with respect to the drive teeth 41.

[0040] The switching gear 33 is mounted on the axle pin 34 in a receiving portion 37. The drive toothing 39 is located in the opening 38 and therefore projects on both sides relative to the disk portion 36.

[0041] The dial counting mechanism 10 is introduced as a unit into the handle 2 through an opening 43 on the side of the adjusting body and is positioned in the hollow cylindrical longitudinal section 14. Through the through-hole 17 the shaft section 18 is guided. A projection 31 of the carrier disk 30 engages in a reaction bearing into a notch 32 in the inner periphery of the longitudinal portion 14 .

[0042] The adjustment body 7 has a socket 44. A follower 45 is arranged on the end face of the socket 44. The follower 45 is designed in the form of a tooth and is arranged protruding outwards at a ring web 46 of the socket 44. Two follower bodies 45 are provided around the circumference at a small distance from each other and form a follower pair. Two follower pairs, each formed by two follower bodies 45, are located diametrically opposite each other around the circumference of the ring web 46.

[0043] The driver 45 of the adjusting body 7 is in engagement with the transmission toothing 22 of the first dial 11 on the adjusting body side. In this way, via its rotational movement, the adjustment of the torque or the release element is effected. The rotational movement of the adjusting body 7 is transmitted directly to the first dial 11.

[0044] Between the first dial 11 and the second dial 12, and between the second dial 12 and the third dial 13, a carrier disk 30 is arranged in each case in a non-rotatable manner. The first carrier disk 30 between the first dial 11 and the second dial 12 has the task of transmitting the rotational movement of the first dial 11 to the second dial 12. The complete rotation of the first dial 11 is 1After rotation, the second dial 12 is rotated further by one number or one position. 1 After performing the rotation, the subsequent third dial 13 is further rotated by one number or one position.

[0045] The switching teeth 40 are surrounded by a ring-shaped collar 26, as can be seen in Fig. 18. Two adjacent switching teeth 42, which are arranged at an angle of 120° to each other, abut on the inside against the collar 26. The collar 26 slides over both switching teeth 42. The changeover gear 33 remains stationary in this position until the dial 11, 12, 13, by means of the changeover element 24 and the notch 27, moves over one changeover tooth 42. The changeover gear 33 is released in this state and can be rotated further by one position or one number.

[0046] The change gear 33 engages with the drive toothing 39 into the transmission toothing 22 of the following second dial 12, so that this dial 12 is held fixed by this change gear 33 while the first dial 11 is rotated. First dial 11 complete 1 After rotation, the switching gear 33 with the switching toothing 40 or one switching tooth 42 and the switching element 24 are brought into engagement. The changeover gear 33 is rotated further by one position and the dial 12 is adjusted by one number. Subsequently, the switching teeth 42 are again covered by the collar part 26 . The switching element 24 is 1 After rotation, the switch gear 33 and the dial 12 are fixed in position or held in an unchanging position until they are again brought into engagement with the switch teeth 42 and the switch gear 33 and the dial 12 are rotated to another position. In the same manner, the third dials 13 are also rotated by one further number or position each. In addition, the present application relates to the invention described in the claims, but may also include the following as other aspects. 1. A torque tool, in particular a torque driver (1), comprising: The device has a handle (2), an adjustment body (7) for adjusting a rotational torque, which is rotatable about a longitudinal axis (L) of the handle (2), and a display unit (3) for indicating the adjusted rotational torque, In the torque tool as described above, the display unit includes a number roller counting mechanism (10), and the number roller counting mechanism (10) has at least two number rollers (11, 12, 13). the number roller counting mechanism (10) is arranged in a hollow cylindrical longitudinal portion (14) of the handle (2), the longitudinal portion having a sight window (16) through which the adjusted rotation torque is visible, and the number roller counting mechanism (10) has a through-hole (17) at the central axis (ML) of the number roller counting mechanism, through which a shaft portion (18) is guided, a carrier disk (30) is arranged in the handle (2) in a non-rotatable manner between two number rollers (11, 12 or 12, 13) and a switching gear (33) is rotatably assigned to the carrier disk (30), the switching gear having a drive toothing (39) and a switching toothing (40), and the number rollers (11, 12, 13) are provided with an outer number rim (20) having a first rim portion (21) with transmission teeth (22) and a second rim portion (23) with a switching element (24); and the adjusting body (7) has means for transmitting a rotational movement of the adjusting body (7) to the number roller (11) arranged on the adjusting body side, A torque tool characterized by: 2. The torque tool according to claim 1, characterized in that the carrier disc (30) has a radial projection (31) which engages in a notch (32) in the handle (2). 3. The adjusting body (7) has a socket (44) with a follower (45), 3. A torque tool as described in claim 1 or 2, characterized in that these driving bodies are in engagement with the transmission teeth (22) of the number roller (11) on the adjusting body side. 4. The shaft portion (18) is part of an adjustment shaft (19) which is a structural element of the adjustment device, via which the adjustment between the adjustment value of the rotation torque indicated by the number roller counting mechanism (10) and the release rotation torque can be performed. 4. A torque tool as described in any one of 1 to 3 above. 5. A torque tool as described in any one of claims 1 to 4, characterized in that each of the number rollers (11, 12, 13) has a hub (28) and a disk body (29) arranged between the hub (28) and the number rim (20). 6. A torque tool as described in any one of claims 1 to 5, characterized in that the switching gear (33) is supported on a rotation shaft pin (34) arranged eccentrically on the carrier disc (30). 7. The carrier disk (30) has a pot-shaped intermediate piece (35) with a radial disk portion (36), the gear shifter (33) is arranged in a receiving portion (37), which is arranged in the outer peripheral area of ​​the intermediate piece (35); and The disk portion (36) has an opening (38) in the area of ​​the receiving portion (37). 7. A torque tool as described in any one of claims 1 to 6. 8. The switching tooth portion (40) is connected to the driving tooth portion (39) at an end face side, The drive tooth portion (39) has a plurality of drive teeth (41), and the switching tooth portion (40) has a plurality of switching teeth (42), The number of the drive teeth (41) is twice as large as the number of the switching teeth (42), These changeover teeth (42) are arranged at an angle to each other on a pitch circle, and 8. A torque tool according to any one of claims 1 to 7, characterized in that the switching teeth (42) are perfectly equally oriented relative to the driving teeth (41). 9. A torque tool according to any one of claims 1 to 8, characterized in that the number roller (11) has a ring-shaped collar (26) on the switching element side, which collar has a cutout (27) in the area of ​​the switching element (24). [Explanation of symbols]

[0047] 1 Torque driver (torque tool) 2 handle 3 Display section 4 Driven part 5 Adjustment device 6 Compression Spring 7 Regulator 8 Locking member 9 Lock body 10 Dial counting mechanism 11 Dial 12 Dial 13 Dial 14 Longitudinal section 15 Wall 16 Peephole 17 Penetration 18 shaft part 19 Adjustment axis 20 Number Rim 21 First rim section 22 Transmission teeth 23 Second rim part 24 Switching Elements 25 Sides of dials 11, 12, and 13 26 Color Section 27 Notch 28 Hub 29 Disk 30 Carrier disc 31 Protrusion 32 Notch 33 Switching gear 34 Rotational axis pin 35 Intermediate piece 36 Disc part 37 Storage unit 38 Opening 39 Drive teeth 40 Switching teeth 41 Drive teeth 42 Switching teeth 43 Opening 44 Sockets 45 Group of People 46 Ring Web L Longitudinal axis ML center axis

Claims

1. A torque driver (1), comprising: The device has a handle (2), an adjustment body (7) for adjusting a rotational torque, which is rotatable about a longitudinal axis (L) of the handle (2), and a display part (3) for the adjusted desired rotational torque, The rotational torque is provided by an adjustment device (5), In the torque driver, the display unit includes a dial counting mechanism (10), and the dial counting mechanism (10) has at least two dials (11, 12, 13). The dial counting mechanism (10) is arranged in a hollow cylindrical longitudinal portion (14) of the handle (2), the longitudinal portion having a sight window (16) through which the adjusted rotation torque is visible, and the dial counting mechanism (10) has a through-hole (17) at a central axis (ML) of the dial counting mechanism, through which a shaft portion (18) is guided, a carrier disk (30) is arranged in the handle (2) in a non-rotatable manner between the two dials (11, 12 or 12, 13) and a switching gear (33) is rotatably assigned to the carrier disk (30), the switching gear having a drive toothing (39) and a switching toothing (40); and The dial (11, 12, 13) comprises an outer numeral rim (20) having a first rim portion (21) with transmission teeth (22) and a second rim portion (23) with a switching element (24), and the adjusting body (7) has means for transmitting a rotational movement of the adjusting body (7) to the dial (11) arranged on the adjusting body side, The shaft portion (18) is a part of an adjustment shaft (19) which is a structural element of the adjustment device, the drive teeth cooperate with the transmission teeth of the dial; the switching teeth cooperate with the switching element of the dial, the switching element located on the side of the drive tooth serves for the subsequent dial to be increased or decreased by one numerical value after each complete revolution, the first carrier disk (30) between the first dial (11) and the second dial (12) serves to transmit the rotational movement of the first dial (11) to the second dial (12); After one complete revolution of the first dial (11), the second dial (12) is further rotated by one number or one position, and the means for transmitting the rotational movement of the adjusting body and the transmission teeth of the first dial adjacent to this adjusting body, i.e. the dial on the adjusting body side, are in a permanent engagement state; A torque driver characterized by:

2. The carrier disk (30) has a radial projection (31) which engages in a notch (32) in the handle (2); the carrier disk (30) is supported in the handle (2) by the projection (31) projecting into the notch (32) and held against rotation by the projection (31).

2. The torque driver according to claim 1 .

3. The adjustment body (7) has a socket (44) with a follower (45), 3. A torque driver as claimed in claim 1 or 2, characterized in that the drivers are in engagement with the transmission teeth (22) of the dial (11) on the adjusting body side.

4. 3. The torque driver according to claim 1 or 2, characterized in that each of the dials (11, 12, 13) has a hub (28) and a disk body (29) arranged between the hub (28) and the number rim (20).

5. 3. The torque driver according to claim 1, wherein the switching gear (33) is supported on a pivot pin (34) arranged eccentrically on the carrier disk (30).

6. The carrier disc (30) has an intermediate piece (35) with a radial disc portion (36), the gear shifter (33) is arranged in a receiving portion (37), which is arranged in the outer peripheral area of ​​the intermediate piece (35); and the disk portion (36) has an opening (38) in the area of ​​the receiving portion (37), through said opening, the gearwheel projects in an area with its drive toothing, so that a part of said drive toothing which faces the downstream dial is brought into engagement with the transmission toothing of the downstream dial, 3. The torque driver according to claim 1 or 2.

7. The switching tooth portion (40) is connected to the driving tooth portion (39) at an end surface side, The drive tooth portion (39) has a plurality of drive teeth (41) and the switching tooth portion (40) has a plurality of switching teeth (42); The number of the drive teeth (41) is twice as large as the number of the switching teeth (42), These changeover teeth (42) are arranged at an angle to each other on a pitch circle, and 3. A torque driver according to claim 1 or 2, characterized in that in each case the switching teeth (42) are oriented exactly the same relative to the drive teeth (41).

8. the dial (11) has, on the switching element side, a ring-shaped collar (26) which is provided with a notch (27) in the area of ​​the switching element (24), the switching gear (33) being stationary until the dial (11, 12, 13) is moved over one switching tooth (42) by the switching element (24) and the notch (27); 3. The torque driver according to claim 1 or 2.

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