135 results about "Angular displacement" patented technology

The invention belongs to the technical field of rolling bearing measurement, and particularly relates to a rolling bearing overturning rigidity measuring device and method, and the device comprises an upper pressing gasket, a loading device, a torque sensor, a motor, a bearing, a lower supporting gasket, a bearing supporting seat, a sensor supporting seat, a platform, a control box, a measuring meter, and a nut A; the motor, the sensor supporting seat and the bearing supporting seat are respectively fixed on the platform; the torque sensor is fixed on the sensor supporting seat, one end of the torque sensor is connected with an output shaft of the motor through a high-rigidity coupling, and the other end of the torque sensor is connected with the loading device through a flange plate and a bolt; according to the method, controllable overturning moment is accurately applied to a bearing outer ring through a high-rigidity and coaxial driving and measuring system, tiny overturning angular displacement generated by the bearing outer ring is synchronously measured, and the overturning rigidity of the bearing is obtained by calculating the slope of a moment-angular displacement relation curve.

The invention belongs to the technical field of metal plate processing and testing, and particularly discloses a device and method for testing the bending forming capacity of a metal composite plate. The device comprises a test base, a movable heating mechanism which slides and can be locked on the test base, a bending test mechanism rotationally connected to the test base, a fixed hydraulic mechanism, a first driving motor and a second driving motor, a heating element is arranged in the movable heating mechanism, so that the plates can be uniformly heated on line; the bending test mechanism controls the clamping force and the bending angle of the bearing through a servo motor in a closed-loop manner, and collects pressure and angular displacement data in real time; and the hydraulic telescopic head of the fixed hydraulic mechanism executes reverse pushing after single bending, so that a fatigue cycle test is realized. According to the invention, normal-temperature / thermal-state multi-angle bending and fatigue testing can be carried out on metal composite plates with different specifications, the forming limit and layering failure critical parameters are rapidly obtained, and the process optimization efficiency and the product reliability are improved.

The invention discloses a compact five-degree-of-freedom teleoperation hand of a series-parallel structure and a control mapping method of the compact five-degree-of-freedom teleoperation hand. The teleoperation hand comprises a base, a wire guiding device, a fixing sleeve, a rotary encoder, a driving arm, a spherical hinge butt joint device, a driven arm, a torsional spring, a movable platform, a front-end operation series connection platform and two angular displacement sensors. The rotary encoder is fixed to the wire guiding device through the fixing sleeve and used for measuring the rotation angle of the driving arm in real time. One end of the driving arm is fixedly connected with a rotor of the rotary encoder, and the other end of the driving arm is hinged with one end of the driven arm; the other end of the driven arm is hinged to the movable platform, and the two angular displacement sensors are used for measuring the pitch angle and the yaw angle of a handle of the front-end operation series platform. The front-end operation series platform is hinged to the movable platform and used for adjusting the posture of the teleoperation hand. The device is simple and compact in structure, low in cost and small in size; through combination of series connection and parallel connection, the rigidity requirement is guaranteed, and meanwhile the flexibility of the device is guaranteed.

The invention relates to a constraint-driven five-axis machining singular area tool path local deformation optimization method. In order to solve the problem that the machining quality is reduced due to the fact that a cutter shaft vector enters a singular area to cause abrupt change of rotation shaft motion, the method comprises the steps that based on an A-C double-turntable five-axis machine tool kinematics model, a singular phenomenon mechanism is revealed through a differential motion relation, and the singular area is defined as a conical area meeting the condition that a cutter shaft vector component Tk is larger than or equal to epsilon k (epsilon k = cos5 degree is approximately equal to 0.9962); identifying a cutter axis vector point set entering a singular region in a cutter path, and expanding transition points along the path to construct a sequence to be optimized; interpolating the rotation angular displacement of the sequence by adopting a B spline curve; establishing an optimization model taking a minimum angle jerk integral square norm (guaranteeing motion stability) and a minimum cutter axis vector deviation (maintaining machining precision) as double targets; and solving an optimal B spline control point through a sequential quadratic programming (SQP) algorithm under a non-singularity constraint machine tool kinematics constraint (angular velocity / acceleration limitation) and a motion continuity constraint (C2 continuity at a connection point), and generating a smooth optimized tool path avoiding a singular region. By means of the optimization method, smoothness optimization of the tool path and stability of machine tool movement are achieved, machining errors are effectively controlled, and the method is suitable for five-axis high-precision machining of complex curved surfaces in the fields of aerospace, mold manufacturing and the like.

The utility model relates to a compound hinge corrugated pipe compensator, which comprises a protective sleeve sleeved on the periphery of a corrugated pipe, and is characterized in that the protective sleeve comprises a first shell and a second shell, the first shell and the second shell are sleeved on the periphery of the corrugated pipe, one end of the first shell is connected with an end pipe at one end of the compensator, and the other end of the first shell is connected with an end pipe at the other end of the compensator. The second shell is connected with an end pipe at the other end of the compensator, the other end of the first shell is rotationally connected into the second shell, and the outer side wall of the first shell is attached to the inner side wall of the second shell. Due to the adoption of the technical scheme, when the compound hinge corrugated pipe compensator disclosed by the utility model is used for carrying out angular displacement compensation on a pipeline, soil does not easily reach the space between the concave parts of the corrugated pipe, so that the possibility that the corrugated pipe is difficult to bend normally due to the fact that the soil is propped against the concave parts is reduced to a certain extent.

A calibration assembly for a guided vehicle. The calibration assembly includes an orientation marker that operably engages with a first guidance apparatus of the guided vehicle. The calibration assembly also includes an imaging assembly that operably engages with and is in electrical communication with a second guidance apparatus of the guided vehicle. When the imaging assembly captures the orientation marker at a translated position for at least one cycle, the imaging assembly calibrates a rotational displacement between a first guidance direction of the first guidance apparatus and a second guidance direction of the second guidance apparatus based on an angular displacement of the orientation marker measured between a zeroed position denoting the first guidance direction and the translated position.

The present application discloses a downhole WOB and torque measurement method and system, which relates to the field of drilling measurement. The method sets vibration measurement sensors at both ends of the drill collar; during the drilling process, the axial acceleration and tangential acceleration of the two ends of the drill collar are measured in real time by the vibration measurement sensors; the axial relative displacement between the two end sections of the drill collar is calculated based on the axial acceleration at both ends of the drill collar; the relative angular displacement between the two end sections of the drill collar is calculated based on the tangential acceleration at both ends of the drill collar; based on the axial relative displacement between the two end sections of the drill collar, the WOB experienced by the drill collar is obtained by using the relationship between WOB and axial relative displacement; based on the relative angular displacement between the two end sections of the drill collar, the torque experienced by the drill collar is obtained by using the relationship between torque and relative angular displacement. The present application proposes a new WOB and torque measurement method, which is simple to operate, has strong anti-interference performance, and can improve the measurement stability and adaptability of downhole WOB and torque.

The invention provides a magnetoelectric angular displacement sensor, and belongs to the technical field of design of steering engine system sensors for airborne missiles. The sensor comprises a rotating shaft connected to an output shaft of the steering engine through threads, a magnet pressed at the rear end of the rotating shaft, a front shell fixed to a shell of the steering engine, a control panel assembly pasted to the front shell, a rear end cover fixed to the front shell and heat insulation cotton arranged between the rear end cover and the control panel assembly, one end of the front shell is provided with a cavity used for containing the rear end of the rotating shaft, the control panel assembly is used for detecting the magnetic force of the magnet, and the distance between the control panel assembly and the magnet is not larger than 0.5 mm. The sensor is high in precision, small in size, strong in anti-interference capability, good in environmental adaptability and long in service life.

The utility model discloses a lifting measuring device for a flow channel flashboard, and belongs to the technical field of flow channel flashboard lifting control. Comprising a rotary encoder which is installed on a rotating shaft of a fluid channel flashboard lifting motor; the pulse distributor is connected with the rotary encoder; the first opening display meter is connected with the pulse distributor, and the first opening display meter is located in the central control room; the second opening display meter is connected with the pulse distributor, and the second opening display meter is located on the local control box; the power supply is connected with the pulse distributor. The technical scheme has the beneficial effects that the angular displacement and the acceleration of the motor rotating shaft are measured by adopting the rotary encoder, so that the ascending and descending heights and speeds of the liquid flow channel flashboard are indirectly measured, and the device has the advantages of high precision, simplicity and convenience in installation and low installation cost.

The present application discloses a motor rotation angle control method, device and system. First, according to a preset second-order derivative function of jerkiness, the target angular displacement of each angular displacement control period is configured. Then, with the angular displacement control period as a period, the rotation angle of the target motor is periodically controlled according to each target angular displacement until the actual angular displacement of the target motor reaches the preset target angle. The second-order derivative function of jerkiness is a piecewise step function, so it can be integrated over its domain to obtain a first-order derivative function of jerkiness without a mutation point, and then integrated to obtain a smooth jerkiness curve. Integrating the smooth jerkiness curve can obtain a smooth acceleration curve. Since there is no acceleration mutation, a smoother angular displacement curve can be determined using a smooth acceleration curve compared to a piecewise step acceleration curve, thereby reducing the degree of impact during the motor rotation process.

A tensioner for a belt is provided, the tensioner having an independently adjustable force that presses a pulley into the belt and provides a damping effect for the tensioner. A tensioner includes a base bracket secured to, for example, an engine block, an arm rotatably engaged with the base bracket, and a pulley rotatably engaged with the arm. A biasing member, such as a spring, is positioned between the arm and the base bracket, and the biasing member generates a torsional force in response to angular displacement, where the torsional force presses the pulley into the belt. The biasing member then generates an axial force in response to the axial displacement, where the axial force presses the arm into a damping bushing unit to generate a damping effect. Thus, these forces are independently adjustable, and the arrangement of the components also reduces the tilt between the arm and the base bracket.

The invention relates to the technical field of mechanical equipment monitoring, in particular to a rotary machinery gear transmission system kinetic parameter identification method, which comprises the following steps: step 1, based on a gear dynamics theory, considering meshing rigidity and meshing damping of a time-varying gear pair, and establishing a transmission chain torsional vibration kinetic model of rotary machinery; step 2, based on the transmission chain dynamic model established in the step 1, respectively establishing parameter identification objective functions of rotational inertia and meshing rigidity; 3, data of angular displacement, angular acceleration and torque of the transmission chain are continuously collected, and data preprocessing is completed; 4, reconstructing a target function of rotational inertia under the reference of the rotor coordinates, and solving the rotational inertia; step 5, based on the rotational inertia identified in the step 4, solving a meshing stiffness objective function; according to the method, the problem that the stability and the reliability of the gear transmission system cannot be accurately predicted by an existing identification method is solved.

The invention discloses a method and a device for measuring the motion idle stroke and the overall flexibility of a flapping-wing aircraft mechanism, and relates to the field of miniature aircrafts, and the method comprises the steps: loading an aircraft wing rod on a high-speed camera measurement platform, and recording an image of the wing rod in a motion period; after the recorded image is optimized and denoised, an optical flow method is used for capturing a moving wing rod, a sub-pixel edge detection method is used for recognizing a gray level image of wing rod movement, then the edge is optimized and corrected based on the geometrical characteristics of the wing rod, and edge calibration is carried out on the gray level image of wing rod movement; then, the angular displacement of the wing rod is recognized according to the wing rod motion gray level image after coordinate calibration is completed, meanwhile, the distribution load of the wing rod is reconstructed, and inversion is conducted on the bending moment of the wing rod through recognized coordinate information and a Tikhonov regularization method; and finally, drawing an angular displacement-bending moment curve graph of the wing rod and extracting the idle stroke and the overall flexibility of the aircraft. According to the method, the motion idle stroke and the overall flexibility of the mechanism on the flapping-wing air vehicle are effectively extracted with high precision, and the method has great guiding significance in design, test and function research of the flapping-wing air vehicle.

The utility model relates to an O-shaped sealing ring, and belongs to the technical field of sealing washs.The O-shaped sealing ring is provided with an annular base body with the rectangular section, annular grooves are formed in the front end face and the rear end face of the base body respectively, the section of each groove is in the shape of a trapezoid with a narrow opening and a wide bottom, and a plurality of connecting plates are evenly distributed in each groove at intervals; one end of the connecting plate is fixedly connected with one side face of the groove, and the other end of the connecting plate is fixedly connected with the other side face of the groove. According to the O-shaped sealing ring with the good sealing effect, the good sealing effect can be provided under the condition of vibration or angular displacement of the front sealing contact face and the rear sealing contact face.

The invention discloses a high-precision plane mirror pose precision adjusting device, which comprises a base, an orientation adjusting mechanism, a pitching adjusting mechanism, a mirror chamber and a three-point gap eliminating mechanism, and is characterized in that each of the orientation adjusting mechanism and the pitching adjusting mechanism comprises a driving assembly and a linear sliding block; the linear sliding block is connected with the execution component through the three-point type gap eliminating mechanism, and the three-point type gap eliminating mechanism comprises an adapter, a fisheye bearing connecting lead screw, a plug screw, a locking nut and an adjusting gasket and is used for eliminating radial and axial gaps at the connecting position at the same time. According to the invention, the high-performance transmission chain is combined with the three-point gap elimination mechanism, and the standard plane mirror is used as an optical function carrier of the system, so that the micro-arc-level angular displacement adjustment precision is realized. Theoretical calculation verifies that the azimuth adjustment resolution and the pitching adjustment resolution are both superior to 0.5 mu rad. The device has the excellent characteristics of gapless transmission, motion decoupling, micro-vibration resistance, long-term stable work and the like.

The invention relates to a meat block enzyme powder uniform spraying device which mainly comprises a reciprocating motion rack, an enzyme powder storage hopper borne on the reciprocating motion rack, a discharging part, a flow adjusting part and an end restraining part. The flow adjusting part is configured to sense inertia force and generate angular displacement relative to the rack through a movable adjusting piece with an eccentric mass center when the rack generates acceleration, so that the geometric coincidence area of the discharging port and the discharging port is dynamically adjusted, and self-adaptive dynamic coupling of the discharging flow and the running speed of the rack is achieved. The movable adjusting piece is provided with a constant-speed opening position and a swing locking position, and when the rack is located at the stopping position of the end of the running path, the end restraining piece is in limiting fit with a pressed part on the movable adjusting piece, the movable adjusting piece is forcibly driven to be kept at the locking position, and the gravity falling path of the movable adjusting piece is blocked. The phenomenon of powder accumulation in the acceleration and deceleration stages is avoided, the problem of enzyme powder leakage in the shutdown intermittent period is solved, and the uniformity of enzyme powder spreading and the process stability are improved.

The invention provides a part continuous self-adaptive detection method and device, a medium and a product. The method comprises the following steps that a to-be-detected part is driven to rotate along with a transparent rotating disc at a preset initial angular speed; determining a first reference rotation time delay and a second reference rotation time delay respectively by combining the angular displacement and the initial rotation angular velocity of the sensing position on the transparent rotating disc and the upper and lower surface imaging positions; when the part rotates and passes through the sensing position, the double timers are synchronously started; acquiring correction parameters in real time in the rotation process to correct the two reference time delays to obtain corresponding correction time delays; when the timers reach the correction time delays respectively, images of the upper surface and the lower surface of the part are collected in sequence; and combining the upper surface image and the lower surface image, processing by a preset analysis method, and generating a detection result. According to the method, self-adaptive correction at the imaging moment can be achieved in the continuous rotation process of the part, the influence of rotating speed fluctuation and mechanical errors on synchronous imaging is eliminated, it is guaranteed that the image position is accurate, the quality is stable, and the detection precision and reliability are improved.

The invention discloses a device and method for measuring the rotational inertia of a rigid body through a high-precision self-adaptive torsional pendulum method, and belongs to the technical field of rigid body mechanical parameter measurement. The self-adaptive clamping module comprises a U-shaped frame, a bearing table and a suspension rod, and the U-shaped frame is installed above the base and the damping unit; the first end of the suspension rod is connected with the bearing table, and the second end is rotatably connected with the U-shaped frame; the torsional pendulum driving module is positioned in the opening of the U-shaped frame; the power output end of the torsional pendulum driving module is in transmission connection with the suspension rod; the dual-sensing measurement system comprises a fiber grating angular displacement sensor and an MEMS acceleration sensor, and the fiber grating angular displacement sensor is installed in the middle of the suspension rod; the MEMS acceleration sensor is mounted on the base and the damping unit; and the intelligent data processing module is electrically connected with the fiber grating angular displacement sensor and the MEMS acceleration sensor. The device is adaptive to rigid bodies with different masses and shapes, and one-key calibration and rapid high-precision measurement can be realized.

The present application relates to a kind of infrared equipment with rotary eccentricity compensation device, belong to infrared equipment technical field, solve the single function of multiple buttons of infrared equipment in prior art, lead to the problem of inconvenient operation.The present application includes: lens assembly, encoder, eccentricity compensation device, driving device, circuit mainboard and infrared module;Eccentricity compensation device can output linear displacement and rotational angular displacement;Circuit mainboard is as the controller of infrared module and driving device;Encoder is used to monitor the size of the rotational angular displacement output by the eccentricity compensation device;Encoder is connected with circuit mainboard, and then can control driving device by the circuit mainboard;The driving device is used to adjust the lens spacing of the lens assembly;When eccentricity compensation device outputs linear displacement, the button of the circuit mainboard can be triggered.The present application realizes multiple functions by a button, simplifies structure, and is easy to operate.

The invention relates to a motion parameter verification method and device, computer equipment and a storage medium. The method comprises the following steps: applying at least one calibration driving instruction to an anti-shake execution mechanism of to-be-tested equipment, and acquiring image data corresponding to each calibration driving instruction acquired by the to-be-tested equipment; matching the reference point displacement feature in each piece of image data with a preset target displacement feature, and determining a target driving instruction; the preset target displacement feature is obtained by calibrating the to-be-measured equipment and / or equipment identical to the to-be-measured equipment according to a preset angular displacement; calculating a gain coefficient of the gyroscope according to the target driving instruction and the preset angular displacement; and determining a motion parameter verification result according to the gyroscope gain coefficient. The method can reduce the cost and improve the verification efficiency.

The present application relates to the technical field of vehicles, and particularly relates to a virtual kingpin steering angle module, comprising: a wheel assembly; a steering knuckle, the upper part of the steering knuckle being provided with an upper mounting seat; a steering mechanism, the output end of the steering mechanism being connected with the upper mounting seat through a three-ball-pin universal joint, the steering mechanism driving the wheel assembly to rotate through the steering knuckle; an upper control arm, the upper control arm comprising an integral lifting lug and an upper cross arm; wherein the three-ball-pin universal joint comprises a ball cage and three ball pin heads which are arranged in the ball cage and uniformly distributed in the circumferential direction, forming a virtual kingpin axis with the center of the three-ball-pin universal joint as a reference, and realizing load decoupling of the steering torque and the ground vertical force. The present application has the advantages that through the spatial arrangement of the three groups of spherical pairs, the torque can be reliably transmitted, the redundant constraints can be reasonably released, the small angular displacement and the adaptive swing around the central axis are allowed, the rigid conflict is avoided, the internal additional stress is significantly reduced, and the load and wear of the bearings and transmission parts are reduced.

The utility model discloses a spatial positioning and pointing mechanism. The mechanism comprises a structure supporting piece, a stepping motor, a harmonic reducer, a Hall angular displacement sensing device and a controller, wherein the structure supporting piece comprises a bearing seat and an output shaft; the stepping motor is used for driving a rotor of the stepping motor to rotate according to the pulse signal; a flexible gear of the harmonic reducer is connected with the output shaft, and a rigid gear is connected with the bearing seat; the wave generator is connected with a rotor of the stepping motor; the Hall effect sensor is installed at the fixed end of the output shaft, and the magnetic steel is installed at the rotating end of the output shaft. The controller is used for receiving the output voltage of the Hall angular displacement sensing device and calculating the position of the spatial positioning pointing mechanism according to the angular displacement and the angular velocity. The mechanism adopts the Hall effect sensor, so that the structure is more compact, the weight and the size are obviously reduced, and the assembly difficulty is reduced; the harmonic reducer is adopted to improve the angular displacement resolution, the output torque is larger, and the application range is wider.

The utility model relates to the technical field of belt conveying, in particular to self-adaptive online monitoring equipment for a roller automatic deviation corrector, which comprises a support. A rotating shaft is fixedly connected to the center of the support, a rotating frame is fixedly connected to the other side of the rotating shaft, central rollers distributed front and back are installed on the upper portion of the rotating frame, fixing frames are fixedly connected to the two sides of the rotating frame, and rotating shafts are rotationally connected to the upper portions of the fixing frames. The outer side of the rotating shaft is fixedly connected with a side edge roller, and one side of the rotating shaft is further fixedly connected with an angular displacement encoder. Once the angular displacement encoder detects that the rotating speeds of the side rollers on the two sides are inconsistent, it shows that the belt deviates, the rotating shaft drives the rotating frame to rotate, the rotating frame drives the fixing frame to rotate, at the moment, the side rollers can rotate under the action of the rotating shaft, advanced deviation correction is achieved, meanwhile, automatic, flexible and accurate actions can be achieved, and the working efficiency is improved. And the belt always runs on the normal belt rail.

The utility model discloses a testing device for a magnetic coupling. The testing device comprises a supporting seat, a rotating shaft, a driving assembly and a detecting assembly, wherein the supporting seat is used for connecting an outer rotor of the magnetic coupling; the rotating shaft is rotatably arranged on the supporting seat, is provided with a first end and a second end which are opposite in the axial direction, and is used for being connected with an inner rotor of the magnetic coupling to drive the inner rotor to rotate; the driving assembly is arranged on the supporting seat, is in transmission connection with the first end of the rotating shaft and is used for driving the rotating shaft to rotate; the detection assembly comprises a torque detection part and / or an angular displacement detection part, the torque detection part is used for detecting the torque transmitted to the rotating shaft by the driving assembly, and the angular displacement detection part is arranged at the second end and used for detecting the rotating angle of the rotating shaft. According to the testing device, the maximum torque value which can be transmitted by the magnetic coupling can be conveniently tested, and the magnetic coupling can be tested before the magnetic coupling is installed on a production line.

The utility model discloses a switch angular displacement potentiometer with an adjustable switch starting position, which comprises a shell, a rotating shaft, a detection assembly, a switch assembly, a glass bead screw, a switch torque sleeve and a locking screw, the rotating shaft penetrates through a corresponding through hole of the shell, and the detection assembly and the switch assembly are respectively arranged in the shell and are respectively connected with the rotating shaft. A protruding strip is arranged on the outer wall of the switch torque sleeve, the switch torque sleeve is arranged on the rotating shaft in a sleeved mode through a center through hole of the switch torque sleeve, a radial screw hole is formed in the wall of the switch torque sleeve, and the locking screw is installed in the radial screw hole and abuts against the outer wall of the rotating shaft. The glass bead screws are installed in corresponding screw holes in the shell, balls of the glass bead screws are close to the outer wall of the switch torque sleeve, and the axial direction of the glass bead screws is perpendicular to the axial direction of the switch torque sleeve. According to the utility model, the switch starting position adjusting function is realized, the switch starting position can be changed according to the actual needs of different users in the final assembly process of production, and the application is convenient.

This invention proposes a servo control method and system for a multi-joint hydraulic manipulator based on sliding mode adaptation, relating to the field of hydraulic equipment servo control technology. Based on the manipulator's current pose and received command information, the method generates the end effector trajectory within the workspace and calculates the desired angular displacement, angular velocity, and angular acceleration of each joint. It then obtains the actual angular displacement of each joint under the current pose and calculates the actual angular velocity. Based on the desired angular displacement, angular velocity, and angular acceleration, and the actual angular displacement, angular velocity, and angular acceleration, combined with the manipulator's dynamics model, the method calculates the driving force of each joint. Based on the desired angular displacement, actual angular displacement, and driving force of each joint, a sliding mode surface is constructed, the adaptive rate is updated, and sliding mode adaptive control is performed on the manipulator. This invention enables precise position control of multi-axis hydraulic actuators with positional characteristics, achieving coordinated control of complex motion laws between multiple axes.

A device with bendable distal end of its elongate body and a system actuating the distal portion of the device is disclosed. A rigid elongate member fixedly attached to a distal portion of a grip structure and forming a pathway for pull-wires, can be manipulated by a control organ, such that an angular displacement of the rigid elongate member within the hollow grip structure with respect to the distal portion of the grip generates bending of the distal portion of the elongate body. The device may further comprise a mechanism for immobilizing the rigid elongate member with respect to the grip in a selected position, such that the bent distal portion of the elongate body remains fixed in the selected position.

The invention relates to a system for determining a torque applied between two rotating members. The system includes a test body with a deformable structure arranged to transmit the torque while enabling an angular displacement according to the applied torque. The system includes two encoders each on a different rotating member and each capable of emitting a periodic signal representative of the rotational displacement of the corresponding member.

The present invention comprises: an outer joint member 21 and an inner joint member 23; a shaft member 2 coupled with the inner joint member 23 so as to be capable of transmitting torque; and a cylindrical boot 30 which seals a joint inner space. The boot 30 is a molded article of a flexible material integrally including a large-diameter cylindrical part 31 and a small-diameter cylindrical part 32, an elastic part 33 which extends from the small-diameter cylindrical part 32 toward the large-diameter cylindrical part 31 and which is elastically deformed by following relative angular displacement of both of the joint members, and a connection part 34 which connects the large-diameter cylindrical part 31 and the elastic part 33. The connection part 34 of the boot 30 is formed thicker than the elastic part 33.

Turning cutting tool (10), comprising: a tool body (11) comprising a flute section (18) having a plurality of helical flutes (22) separated from each other by teeth (23); and an adjustable vibration absorber arrangement (60) arranged within a cavity (25) formed in the clamping groove section (18), the adjustable vibration absorber arrangement (60) comprising at least two adjustable absorber masses (62), an elastic material (64) between the at least two absorber masses (62) and the cavity (25), and one or more connecting elements (66) arranged between the at least two absorber masses (62) to prevent a relative angular displacement between the at least two adjustable absorber masses (62) about a central longitudinal axis (12) of the rotary cutting tool (10), wherein the one or more connecting elements (66) are not in contact with the tool body (11) to allow the at least two adjustable absorber masses (62) to be held only by the elastic material (64), which enablesthat the adjustable vibration absorber arrangement (60) is set to a desired frequency in order to suppress torsional vibrations of the rotary cutting tool (10) during a cutting operation.