Abstract: A torque detector includes an output body, an input body adapted to permit a torque to be applied thereto, a torque beam unit, and a detecting unit disposed between the input and output bodies for converting a relative rotation of the input and output bodies into an electric signal. The torque beam unit includes a shaft, at least one flexible first beam extending radially and outwardly from the shaft and having a proximate end portion connected to the shaft, and a distal end portion connected to and co-rotatable with the output body, and at least one second flexible beam extending radially and outwardly from the shaft in a direction different from that of the first beam and having a proximate end portion connected to the shaft, and a distal end portion connected to and co-rotatable with the input body.

Abstract: A fluid parameter measuring instrument relies upon a torque transmitting member comprising an integrally joined and substantially concentric shaft within a tube to transfer torsional stress across a pressure differential barrier without a penetration aperture seal. On one environmental side of the barrier, a pair of thin wall beams having strain gauges secured thereto are secured proximate of the beam mid-points to the torque transmitting member and the opposite ends to barrier structure. The strain gauges are connected in an electrical balance circuit to measure torque as a function of stress on the beams.

Abstract: A torque monitoring apparatus is disclosed herein. The torque monitoring apparatus includes a hub extending along an axis of rotation between first and second opposite ends. The torque monitoring apparatus also includes a plurality of spokes positioned on the hub and extending radially outward from the hub to respective distal ends. The torque monitoring apparatus also includes a plurality of projections spaced from the plurality of spokes along the axis of rotation. Each of the plurality of projections extends radially outward from the hub to respective distal ends. The plurality of projections are thinner along the axis than the plurality of spokes.

Abstract: A load cell structure for receiving strain gages to monitor applied torsional forces wherein the opposing force-receiving ends have a plurality of sensing beams spaced about an axis of rotation. Limit posts located between the ends each have a discontinuity therein that includes a U-shaped gap to limit relative rotation about the axis and thereby providing overload protection.

Abstract: A single crystal semiconductor including a Wheatstone bridge circuit formed of an impurity diffusion layer whose longitudinal direction is aligned with a particular crystal orientation is connected to a rotating body. A rotating body dynamic quantity measuring device and a system using the measuring device are fatigue- and corrosion-resistant because of the single crystal semiconductor used and are not easily affected by temperature variations because of the bridge circuit considering a single crystal anisotropy.

Abstract: Provided is a torque detection apparatus including a base portion, a drive portion, and a detection portion. The drive portion includes a rotor having a main axis in a direction of a first axis, and a stator configured to rotate the rotor around the main axis. The detection portion includes a strain body and a detection element. The strain body includes a first end portion to be fixed to the base portion and a second end portion to be fixed to the rotor, and is arranged concentrically with the rotor. The detection element is provided to the strain body so as to detect a strain of the strain body around the first axis with respect to the base portion.

Abstract: A chuck-integrated force-measuring system for determining cutting forces at the cutting tool tip of a rotating tool, for example a drill or milling cutter having at least one measuring sensor, as well as a measured-value processing station. The at least one measuring sensor is designed as a strain sensor which is placeable on a tool holder of a machine tool. A measuring hub assembly is also provided which is insertable as an adapter piece into the chuck of the machine tool and is designed with its own chuck for receiving the tool, the at least one measuring sensor being integrated in the adapter piece.

Abstract: A trailer hitch assembly is provided for monitoring trailer hitch loads comprising a hitch support and a hitch coupled to the hitch support including a hitch base having a hitch base radius, a hitch ball disposed on and above the hitch base, and a lug extending downwardly from the hitch base. An instrument spacer is disposed between the hitch base and the hitch support defining a cylindrical bore receiving the lug. The cylindrical bore extends along a central bore axis and has a bore radius that is less than the hitch base radius. At least one strain gauge is disposed on the instrument spacer at a radial distance from the central bore axis that is less than or equal to the hitch base radius and greater than or equal to the bore radius.

Abstract: The present application relates to an input torque measuring device for a drive train of a bicycle. The drive train includes a first crank arm and a second crank arm. An inboard end of each crank arm is rotatably mounted to the bicycle at a bottom bracket of the bicycle. At least one chain ring is configured to rotate a driven wheel of the bicycle. A spider is connected to the first crank arm adjacent the bottom bracket and extends out to the at least one chain ring. The spider is configured to transmit force applied to the crank arms directly to the at least one chain ring. The spider may include a plurality of sensors configured to respond to the force applied by the spider to the at least one chain ring. The sensors produce an electronic signal relative to the force transmitted by the spider to the at least one chain ring and a processor configured to receive the electronic signals from each sensor of the spider.

Abstract: The invention relates to a measuring device (20) for ascertaining a torque acting on an axis (A2,) and to a robot (1) with a robot arm (2) having a plurality of members which are rotatably mounted in reference to axes (A1-A6). The robot (1) also has the measuring device (20), in order to determine for at least one of the axes (A2) the torque exerted on that axis (A2).

Abstract: Provided is a torque sensor including a first rotating body, a second rotating body, a strain body, and a detection element. The first rotating body is rotatable around an input shaft. The second rotating body is rotatable around an output shaft. The strain body includes a first engaging portion. The first engaging portion is separated from at least one of the rotating bodies in a first direction parallel to the input shaft, a second direction perpendicular to the first direction, and a third direction around the input shaft and is capable of engaging to the at least one of the rotating bodies in the third direction. The strain body transmits a rotational torque to the third direction between the first rotating body and the second rotating body. The detection element is provided to the strain body to measure a strain of the strain body due to the rotational torque.

Abstract: Aspects of the present invention are directed to using surface acoustic wave (SAW) sensors mounted on a disc coupling component in a powertrain to measure the torque generated by an automobile engine. The sensor may be positioned and oriented on the disc coupling component so that the phase velocities of SAWs propagating through active elements of the SAW sensors are aligned with principal strain components due to torque in the disc coupling component. The torque may be calculated by determining the difference between resonant frequencies of the active elements to suppress common-mode interference factors. In addition, SAW resonant frequencies may be communicated in a non-contacting manner by utilizing rotary and stationary couplers employing radio frequency (RF) signals. Moreover, SAW sensors may be activated and interrogated by employing targeted RF pulses having different carrier frequencies at or near respective resonant frequencies of each resonator in a SAW sensor.

Abstract: A torque sensing arrangement has a set of strain sensors, such as strain gauges, mounted to an adapter that can be mounted to a chain ring of the crank set of a bicycle wheel. The adapter may have an annular body that can be used to retrofit the original crank set of a bicycle to have torque sensing components without having to replace the chain rings or the crank arm of the crank set. Together with angular velocity measurements, the measurements of the strain sensors may be used to calculate the amount of work or power exerted by the cyclist to propel the bicycle.

Abstract: An adapter of the present invention includes a torsion rod for transferring torsion force between two tools/workpieces. The torsion rod has at least one arc surface disposed on its periphery. The arc surface and the torsion rod are concentric. A strain meter is disposed on the arc surface, and a displayer connects to the strain meter. As such, the adapter of the present invention can measure the torque value more precisely.

Abstract: The invention relates to a torque measurement device having a torque measurement shaft disposed between two flanges, whereby an intermediate shaft is provided between at least one of the two flanges and the measurement shaft, which intermediate shaft is disposed axially at the same height as the measurement shaft, on a different radius.

Abstract: A method and apparatus for measuring the force applied by a first member coupled to a second member by a connecting body, by: transmitting a cyclically-repeating energy wave through the connecting body from a first location thereon to a second location thereon; measuring the transit time of the cyclically-repeating energy wave from the first location to the second location; and utilizing the measured transit time to produce a measurement of the force. In the preferred described embodiment, the connecting body is a fastening plate which fastens a drive shaft to a driven shaft and measures the torque output of the drive shaft.

Abstract: A fluid parameter measuring instrument relies upon a torque transmitting member comprising an integrally joined and substantially concentric shaft within a tube to transfer torsional stress across a pressure differential barrier without a penetration aperture seal. On one environmental side of the barrier, a pair of thin wall beams having strain gauges secured thereto are secured proximate of the beam mid-points to the torque transmitting member and the opposite ends to barrier structure. The strain gauges are connected in an electrical balance circuit to measure torque as a function of stress on the beams.

Abstract: An apparatus can be assembled between a pump and a motor driving the pump for a measuring torque and speed. The apparatus can include a housing having a motor attachment port and a pump attachment port. A primary coil is supported by the housing. A shaft has a first outer end and second outer end and an inner portion located within the housing. The first and second outer ends are connectible to a motor and a pump to suspend the shaft between the motor and the pump only by the outer ends of the shaft. A strain gauge transducer component is operably associated with the shaft. A secondary induction coil is mounted on the shaft and is located sheathed within the primary coil for providing power to the strain gauge transducer component. A wireless output of readings from the strain gauge transducer component is provided.

Abstract: Strain gauges are mounted on each crank arm of the bicycle and provide a measure of the torque applied to each crank arm. In a preferred embodiment, strain gauges are mounted on opposite edges of each crank arm, which includes a self-contained power, electrical circuitry, and a wireless transmitter for transmitting the strain measurement information to a main controller. The main controller includes a wireless transceiver for transmitting and receiving data from both the left and right crank arms and external devices. Memory is also included for storing such data for subsequent analysis to determine the individual leg performance of a cyclist during a race or training session.

Abstract: A torque sensing and control device for tools comprises: a torque sensing and transmitting adapter fabricated with rib structure and mounted on or built in a fastening tool; at least a torque sensor secured on at least a rib evenly spaced and formed on the adapter and operatively sensing a torque signal when applying a torque on a work or object when rotatably operating the fastening tool; and a digital display control module operatively receiving the torque signal, displaying a torque data and generating an audio or visual warning signal for reminding the user for stopping operation of the fastening tool, or for switching off power or air supply to the fastening tool, and or actuating a delay control to restart a next fastening operation in a pre-determined time interval.

Abstract: A method is provided for measuring torque in a shaft of a drive line including a disc coupling component such as a flexplate 1 or a flanged coupling 13, as well as a drive coupling system for carrying out the method. The disc coupling component 1, 13 is connected between a drive input 4 and a drive output so that all torque transmitted between the input and output passes through said component. The disc coupling component 1, 13 has a radially extending portion, which may include a plurality of spokes 7, to which is attached a SAW based strain sensor which communicates with a stationary coupler 3 fastened to an engine block 5 for wireless transmission of data from the sensor, the strain sensor measuring the strain in the disc coupling component 1, 13 from which the torque carried in the input shaft 4 may be calculated.

Abstract: A torque sensing and control device for tools comprises: a torque sensing and transmitting adapter fabricated with rib structure and mounted on or built in a fastening tool; at least a torque sensor secured on at least a rib evenly spaced and formed on the adapter and operatively sensing a torque signal when applying a torque on a work or object when rotatably operating the fastening tool; and a digital display control module operatively receiving the torque signal, displaying a torque data and generating an audio or visual warning signal for reminding the user for stopping operation of the fastening tool, or for switching off power or air supply to the fastening tool, and or actuating a delay control to restart a next fastening operation in a pre-determined time interval.

Abstract: A single crystal semiconductor including a Wheatstone bridge circuit formed of an impurity diffusion layer whose longitudinal direction is aligned with a particular crystal orientation is connected to a rotating body. A rotating body dynamic quantity measuring device and a system using the measuring device are fatigue- and corrosion-resistant because of the single crystal semiconductor used and are not easily affected by temperature variations because of the bridge circuit considering a single crystal anisotropy.

Abstract: A torque transferring and monitoring device includes a coupling having a hub portion, a first rim portion, a first set of spokes radially extending between the hub portion and the first rim portion, a second rim portion spaced apart from the first rim portion and a second set of spokes radially extending between the hub portion and the second rim portion. The second set of spokes are axially spaced apart from the first set of spokes. A plurality of pins are fixed to the first rim portion. Each pin has a portion positioned in an aperture formed in the second rim portion. The pin is clear of the second rim portion when the coupling is in an unloaded state. The pin engages the second rim portion to transfer load between the first and second rim portions when a torque exceeding a predetermined magnitude is transferred through the coupling.

Abstract: A nut is disclosed including a body having a visual indicator coupled thereto and integral therewith. The visual indicator provides a visual indication of a stress state of the body of the nut.

Abstract: An electronic torque wrench having a flexible head provides accurate torque measurements irrespective of the angular position of the head relative to a handle on which the force is applied. The head includes first and second portions connected by at least three pivotal links. One of the links is used to react against the entire torque applied to the handle, regardless of the pivotal position of the handle. An electronic strain gauge on the torque-reacting link provides a measurement of the torque applied to the fastener.

Abstract: An apparatus can be assembled between a pump and a motor driving the pump for a measuring torque and speed. The apparatus can include a housing having a motor attachment port and a pump attachment port. A primary coil is supported by the housing. A shaft has a first outer end and second outer end and an inner portion located within the housing. The first and second outer ends are connectible to a motor and a pump to suspend the shaft between the motor and the pump only by the outer ends of the shaft. A strain gauge transducer component is operably associated with the shaft. A secondary induction coil is mounted on the shaft and is located sheathed within the primary coil for providing power to the strain gauge transducer component. A wireless output of readings from the strain gauge transducer component is provided.

Abstract: Aspects of the present invention are directed to using surface acoustic wave (SAW) sensors mounted on a disc coupling component in a powertrain to measure the torque generated by an automobile engine. The sensor may be positioned and oriented on the disc coupling component so that the phase velocities of SAWs propagating through active elements of the SAW sensors are aligned with principal strain components due to torque in the disc coupling component. The torque may be calculated by determining the difference between resonant frequencies of the active elements to suppress common-mode interference factors. In addition, SAW resonant frequencies may be communicated in a non-contacting manner by utilizing rotary and stationary couplers employing radio frequency (RF) signals. Moreover, SAW sensors may be activated and interrogated by employing targeted RF pulses having different carrier frequencies at or near respective resonant frequencies of each resonator in a SAW sensor.

Abstract: A wrench includes a head, a strain-vulnerable unit, at least one sensor, a handle set and a display. The strain-vulnerable unit includes a first end attached to the head, a second end at an adequate distance from the head and an aperture defined in the second end. The sensor is attached to the second end of the strain-vulnerable unit for detecting strain in the second end of the strain-vulnerable unit and sending a signal. The handle set is connected to the strain-vulnerable unit. The display is provided on the handle set and electrically connected to the sensor.

Abstract: A torque wrench includes a handle and a function shaft longitudinally mounted to the handle. The handle has a counter mounted in a middle portion of the handle. The function shaft has a head adapted to drive a workpiece and a connecting rod laterally extending from the head. The connecting rod is received in and engaged to one end of the handle. The function shaft has a torque sensor mounted in the connecting rod and electrically connected to the counter for sensing a torque value from the head, whereby the counter executes a weighted compute and shows date when receiving a signal from the torque sensor.

Abstract: The invention relates to a steering system (10) for a motor vehicle.

Abstract: Strain gauges are mounted on each crank arm of the bicycle and provide a measure of the torque applied to each crank arm. In a preferred embodiment, strain gauges are mounted on opposite edges of each crank arm, which includes a self-contained power, electrical circuitry, and a wireless transmitter for transmitting the strain measurement information to a main controller. The main controller includes a wireless transceiver for transmitting and receiving data from both the left and right crank arms and external devices. Memory is also included for storing such data for subsequent analysis to determine the individual leg performance of a cyclist during a race or training session.

Abstract: A single crystal semiconductor including a Wheatstone bridge circuit formed of an impurity diffusion layer whose longitudinal direction is aligned with a particular crystal orientation is connected to a rotating body. A rotating body dynamic quantity measuring device and a system using the measuring device are fatigue- and corrosion-resistant because of the single crystal semiconductor used and are not easily affected by temperature variations because of the bridge circuit considering a single crystal anisotropy.

Abstract: A method is provided for measuring torque in a shaft of a drive line including a disc coupling component such as a flexplate 1 or a flanged coupling 13, as well as a drive coupling system for carrying out the method. The disc coupling component 1, 13 is connected between a drive input 4 and a drive output so that all torque transmitted between the input and output passes through said component. The disc coupling component 1, 13 has a radially extending portion, which may include a plurality of spokes 7, to which is attached a SAW based strain sensor which communicates with a stationary coupler 3 fastened to an engine block 5 for wireless transmission of data from the sensor, the strain sensor measuring the strain in the disc coupling component 1, 13 from which the torque carried in the input shaft 4 may be calculated.

Abstract: A torque sensor packaging system and method includes a torque member that includes one or more holes formed therein for receiving one or more respective fasteners associated with a sensing element. The sensing element can be connected to the torque member to the sensing element in order to transfer torque associated with the torque member to the sensing element for torque sensing operations thereof.

Abstract: Magnetic or electric field sensors are mounted against a material surface and used for stress, strain, and load monitoring of rotating components such as vehicle drive trains. The stationary sensors are mounted at multiple locations around the component and used assess the stress on the component at multiple rotational positions. The sensor response is typically converted into a material property, such as magnetic permeability or electrical conductivity, which accounts for any coating thickness that may be present between the sensor and mounting surface. The sensors are not in direct contact with the rotating component and are typically mounted on an annular material or ring that encircles the rotating component. Measurements of the annular material properties, such as the stress, are related to the stress on the rotating component and discrete features on the component.

Abstract: A torque sensor for a vehicle steering system includes a voltage boosting circuit that boosts a voltage supplied from a power source, an oscillator, a current amplifier, an inverting current amplifier, first and second coils, first and second resistors, a differential amplifier, a sampling pulse generator that generates a sampling pulse, a synchronous wave detector that detects the AC voltage output from the first differential amplifier, a first sample-and-hold circuit section that samples and holds the voltage output from the first synchronous wave detector, and a voltage-current converter that converts the voltage output from the first sample-and-hold circuit section into current and outputs the current as a torque signal Ts, thereby stably supplying power to the torque sensor for a steering system.

Abstract: A driving mechanism includes a motor and a wave gear device. Three sets of torque sensors are attached at intervals of 120° on a diaphragm of a flexible external gear of the wave gear device. In the rotational angle detecting part of the signal processing circuit, signal components that are included in the outputs of the torque sensors, that vary in the form of two cycles of a sine wave per rotation of the wave generator and are synchronous with a rotational angle of the wave generator are extracted and a coordinate transformation is carried out for the obtained three-phase sinusoidal signals to calculate two-phase sinusoidal signals that are 90° out of phase, with the rotational angle of the wave generator being calculated based on these signals. Without providing a rotational angle detector separately, it is possible to detect the rotational angle of the wave generator using the outputs of the torque sensors.

Abstract: In a torque sensor having lead pins connected to a wire harness, the wire harness includes: a plurality of lead wires; a plurality of connection terminals each having a sleeve mounted around each of the lead pins and a connection portion extended from an outer periphery of the sleeve to be connected with one end of the lead wire; and an electrically insulating terminal holder for holding the plural connection terminals. The terminal holder includes: a sleeve holder portion for holding the sleeves in mutually spaced relation in order to prevent the sleeves from contacting each other; and a connection-portion holder portion for holding the connection portions in mutually spaced relation in order to prevent the connection portions from bending to contact each other.

Abstract: The torque detection device for a wave gearing comprises a strain gauge unit having a strain gauge pattern. The strain gauge pattern includes circular-arc shaped detection segments A and B, and three terminal portions for external wiring with one being formed between the detection segments and the others at opposite ends thereof. The strain gauge unit having the strain gauge pattern can be mounted on the diaphragm of a flexible external gear by a simple operation of positioning the strain gauge unit on the diaphragm and connecting the three terminal portions to the external wirings. Compared to the case where a large number of perpendicular biaxial strain gauges are positioned and wired to form a bridge circuit, the wiring operation can be simplified, the mounting space can be reduced, and errors in detected signals due to the positioning errors of the strain gauges can also be reduced.

Abstract: A wave gear device torque detection method in which the gain of the output of each of a plurality of strain gauge sets affixed to the diaphragm of a flexible external gear is amplified and the outputs are then combined to form a detection signal. Adjusting the gain of each of the strain gauge outputs makes it possible to compensate for rotational ripple included in the output. Compensation of up to n order ripple components is possible by using at least (2n+1) strain gauges.

Abstract: A device is presented having an optical emitter/receiver device. The device has a light pipe connected with the optical emitter/receiver device. Also a rotating shaft having at least one opening. The light pipe is situated within the rotating shaft. At least one bearing having a reflective marker is connected to the shaft.

Abstract: Disclosed herein is a torque detector. The torque includes a synchronous detector, a bridge circuit and a signal converter. The synchronous detector detects an AC voltage signal having a preset DC voltage level and a certain frequency, and generates a detection output signal. In the bridge circuit, a torque detection coil whose inductance varies with rotation of a steering wheel and a temperature compensation coil whose inductance varies with temperature variation are connected in series to each other. The detection output signal and the DC voltage are applied to both ends of the two connected coils, respectively. The bridge circuit allows a first detection voltage to be induced at a connecting point between the two coils by variation of the inductance of the two coils. The signal converter generates a torque detection signal having an amplitude corresponding to a difference between peak values of a preset reference voltage and the first detection voltage.

Abstract: A torsion module includes first and second rings (9, 9′) and a spoked wheel (8). The first ring is attachable to a steering wheel (13). The spoked wheel is attached on top and bottom sides to the rings and has bending spokes which join a rim to a hub. The bending spokes bend in response to rotation angle offset between the hub and rim caused by torque on the steering wheel. A sensor, placed on a bending spoke, generates a signal indicative of bending experienced by the bending spoke in response to rotation angle offset between the hub and rim. The spoked wheel includes bending-resistant limit stop spokes each having a free end. The free ends engage the rim to limit rotation angle offset between the hub and rim. The rings have axially separated limit stops which enclose the free ends to prevent axial movement between the hub and rim.

Abstract: A torsion module includes first and second rings (9, 9′) and a spoked wheel (8). The first ring is attachable to a steering wheel (13). The spoked wheel is attached on top and bottom sides to the rings and has bending spokes which join a rim to a hub. The bending spokes bend in response to rotation angle offset between the hub and rim caused by torque on the steering wheel. A sensor, placed on a bending spoke, generates a signal indicative of bending experienced by the bending spoke in response to rotation angle offset between the hub and rim. The spoked wheel includes bending-resistant limit stop spokes each having a free end. The free ends engage the rim to limit rotation angle offset between the hub and rim. The rings have axially separated limit stops which enclose the free ends to prevent axial movement between the hub and rim.

Abstract: The torque detection device for a wave gearing comprises a strain gauge unit having a strain gauge pattern. The strain gauge pattern includes circular-arc shaped detection segments A and B, and three terminal portions for external wiring with one being formed between the detection segments and the others at opposite ends thereof. The strain gauge unit having the strain gauge pattern can be mounted on the diaphragm of a flexible external gear by a simple operation of positioning the strain gauge unit on the diaphragm and connecting the three terminal portions to the external wirings. Compared to the case where a large number of perpendicular biaxial strain gauges are positioned and wired to form a bridge circuit, the wiring operation can be simplified, the mounting space can be reduced, and errors in detected signals due to the positioning errors of the strain gauges can also be reduced.

Abstract: A device is presented having an optical emitter/receiver device. The device has a light pipe connected with the optical emitter/receiver device. Also a rotating shaft having at least one opening. The light pipe is situated within the rotating shaft. At least one bearing having a reflective marker is connected to the shaft.

Abstract: A microstrain sensor is provided for measuring deformation, and indirectly, other parameters such as acceleration, temperature, pressure, and force. Rather than providing several discreet resistance paths, the microstrain sensor utilizes input and output conductors connected to a single piece of film through which current travels to indicate resistance. The film provides superior resistance to external effects, such as temperature gradients, that decrease the accuracy of the sensor's readings. Such sensors may be easily adapted for use in situations in which opposing stresses are present, such as dually constrained members, by disposing separate or unitary film sections on opposite sides of a zero stress point, such as a central plane of a fixed-guided beam. Such sensors may be utilized in many different applications, including automotive safety systems.

Abstract: A torque sensor for a bicycle bottom bracket assembly having a bottom bracket axle includes an axle supporting member for supporting the axle for rotation around a support axis. The axle supporting member has a first sensor mounting location, and a first pressure sensor is provided for placement at the first sensor mounting location. In a more specific embodiment, the axle supporting member includes a second sensor mounting location and a second pressure sensor is provided for placement at the second sensor mounting location. The second sensor mounting location may be spaced apart from the first sensor mounting location in the direction of the support axis. In this case the second sensor mounting location may face the first sensor mounting location in the direction of the support axis or may be disposed diagonally across from the first sensor mounting location in the direction of the support axis.

Abstract: A torque measuring device, in particular for use by means of commercially available tools, includes a measuring head with a connecting element provided for torque transmission. To permit the torque measuring instrument to be used universally, the connecting element is embedded in the measuring head and connected at one end to the component to be tightened and at the other end directly to a torque-producing tool. As a result, the torque measuring device can be used both with commercially available wrenches or other tools operated by electric motor or pneumatically. The torque measuring device is placed directly on the components to be tightened, while the tool is inserted into an existing tool holder. A particular advantage is that the torque measuring device is constructed so as to co-rotate, and therefore the possible use of driven tools is provided, on account of the possible rotation.