A torque sensor for use in an electric power assisted steering system comprises a first shaft, a second shaft, and a torsion bar, a hollow sleeve that is secured to the first shaft and extends along the torsion bar to at least partially axially overlap the second shaft, angular deflection indicating means that produce a signal that is dependent on the angular deflection of the first shaft relative to the second shaft as a torque is applied across the torque sensor that causes the torsion bar to twist, at least one drive dog fixed to the sleeve and at least one corresponding drive dog fixed to the second shaft, in normal operation the two dogs being offset so that they permit a defined range of angular deflection of the torsion bar but will engage each other to provide a path for torque to be transferred from the first shaft to the second shaft in the event of a failure of the torsion bar, and a connecting element which has a first part that is secured within a bore in one of the second shaft and the sleeve, the connecting element having a second part that extends into a feature of the other of the second shaft and the sleeve, at zero torque across the torque sensor the connecting element being spaced circumferentially from the feature by an angular distance greater than the spacing between the drive dogs and spaced from the feature in a direction along the axis of the shafts that is less than the overlap of the drive dogs in that direction to prevent the shafts moving apart in the event of failure of the torsion bar by an amount that would otherwise prevent the drive dogs engaging.

A torsion sensor, including a casing assembly, a sleeve set, a driven slider, a driving slider, an elastic member, a magnetic sensor, and a magnetic member is provided. The sleeve set includes a first sleeve, a second sleeve, and a third sleeve. The first sleeve is disposed in the casing assembly. The second sleeve has a neck portion sleeved on the second side of the first sleeve. The third sleeve is disposed between the first and the second sleeves. The driven slider is connected to a head portion of the second sleeve. The driving slider surrounds an outer side of the driven slider. The elastic member surrounds an outer side of the second sleeve. One of the magnetic sensor and the magnetic member is disposed in the casing assembly, and the other one is disposed in the sleeve set. The magnetic sensor and the magnetic member are disposed opposite to each other.

A torque sensor apparatus capable of suppressing the behavior of a vehicle when the vehicle breaks down even when an adhesive between a magnet and a sleeve is peeled off is provided. The torque sensor apparatus includes a rotor and a stator that are rotatable relative to each other and are respectively fixed to an input shaft and an output shaft. The torque sensor apparatus includes a sleeve, fixed to the input shaft and fixed to the magnet of the rotor; a position regulating portion, disposed on the magnet and restricting a rotational position of the magnet and the sleeve; and a protruding portion, disposed on the sleeve and installed corresponding to the position regulating portion. A front end of the protruding portion is enlarged along a circumferential direction of the sleeve.

According to an aspect, a system includes a memory system configured to store a plurality of instructions and a processing system. The processing system is configured to communicate with the memory system and execute the instructions that result in determining an initial torque applied to a component stack, determining an assembly torque and an angle of turn applied to the component stack after the initial torque is applied, and determining a friction value associated with the component stack. Execution of the instructions further result in determining a stack load of the component stack based on the friction value, the assembly torque, and the angle of turn, and outputting an indicator of the stack load.

An object of the present invention is to provide a steering apparatus capable of improving a function of a bearing that supports a steering shaft. A steering apparatus includes a steering shaft, a first housing member, a second housing member, and a bearing. The steering shaft rotates according to a rotation of a steering wheel. The first housing member is located on one side in a rotational axial direction of the steering shaft, and includes a cylindrical portion and a flange portion. The cylindrical portion surrounds the steering shaft. The flange portion extends in a radial direction with respect to a rotational axis of the steering shaft to an outer side of the cylindrical portion in the radial direction. The second housing member is provided on the other side in the rotational axial direction, and forms a housing together with the first housing member. The second housing member includes a connection portion and a containing portion. The connection portion is connected to the flange portion of the first housing member. The containing portion contains a part of the steering shaft. The bearing is provided at a position that overlaps the flange portion in the rotational axial direction on an inner peripheral side of the cylindrical portion of the first housing member, and supports the steering shaft.

A device includes a first assist shaft having a first axially extending bore, the first assist shaft engaging, via the first axially extending bore, a first end of a torsion bar. The device may include a flux carrier engaged on an end of the first assist shaft proximate the torsion bar. The device may include a second assist shaft having a second axially extending bore, the second assist shaft engaging, via the second axially extending bore, a second end of the torsion bar and connected to the first assist shaft by the torsion bar. The device may include a permanent magnet ring having an inner circumference that receives an outer circumference of the second assist shaft and the permanent magnet ring disposed in a third axially extending bore of the flux carrier. The device may include a magnetic flux sensor at least partially disposed in the flux carrier.

To improve the output signal quality of a load measurement by means of active magnetization, the invention provides a load measurement method for measuring a mechanical load on a test object (14), comprising: a) generating and applying a magnetic field to the test object (14); b) detecting a magnetic field changed by the test object (14) as a result of a mechanical load on the test object (14) by means of a first magnetic field detection device (20) to generate a first measurement signal (U1, UAB), c) detecting a magnetic field changed by the test object (14) as a result of a mechanical load on the test object (14) by means of a second magnetic field detection device (22) to generate a second measurement signal (U1, UAB), d) computationally determining a third measurement signal (UBT) from the first measurement signal (U1, UAB) and the second measurement signal (U2, UAT), and preferably comprising the steps of e) forming a difference from one (U2, UAT) of the first and the second measurement signals and the computationally determined third measurement signal (UBT) to produce an output signal, f) determining the mechanical load applied to the test object (14) based on the output signal. The invention also provides a corresponding load measurement device for carrying out the load measurement method.

An embodiment relates to a sensing device comprising: a housing; a stator disposed within the housing; and a rotor disposed within the stator, wherein the stator comprises a body and a stator tooth coupled to the body, the housing comprises a first surface corresponding to a bottom surface of the stator tooth, and the first surface comprises a curved surface protruding toward the stator tooth. Accordingly, noise can be reduced by reducing the amount of contact between the stator and the housing.

Aspects of this disclosure relate to a torque and angle sensing device. A sensor and a processing circuit are integrated into the device. The sensor is configured to generate a first signal indicative of a first angle and/or speed. The device includes an input contact configured to receive a second reference signal indicative of a second reference angle and/or speed. The processing circuit is configured to generate an indication of torque based on at least the first signal and the second signal. In certain applications, the processing circuit is capable of pre-programming and/or learning and storing the reference information and generating an indication of torque based on the first signal generated internally and the reference information. An output contact of the device can provide the indication of torque. Related systems and methods are also disclosed.

A pedaling sensing device of an electric bicycle is configured to connect to a motor and includes a crank axle, a first gearwheel, a second gearwheel, an assisting unit and a sensing unit. The crank axle extends along an axial direction and has a plurality of first helical teeth connected to each other and arranged continuously. The first gearwheel is disposed around the crank axle and comprises a first inner annulus surface and a first outer annulus surface. The first inner annulus surface is formed with a plurality of second helical teeth matching the first helical teeth. The second helical teeth are connected to each other and arranged continuously. The second gearwheel is disposed around the first gearwheel and has a second inner annulus surface. The second inner annulus surface is formed with a second transmission structure matching the first transmission structure.