107 results about "Radial deviation" patented technology

An exercise machine ergonomic handle system for providing hand-holds for the performance of exercises with reduced flexion and / or extension of the hand and wrist and reduced ulnar and / or radial deviation so as to reduce injury and allow application of full strength to the exercise machine. The exercise machine ergonomic handle system generally includes a longitudinally extending frame, a carriage that moves upon a first longitudinal portion of the frame, and at least one pair of ergonomic handles positioned on a second longitudinal portion of the frame. The ergonomic handles rotate about an axis to prevent flexion and / or extension, and can be positioned at a width and / or angle that reduces ulnar and / or radial deviation.

An exercise machine ergonomic handle system for providing hand-holds for the performance of exercises with reduced flexion and / or extension of the hand and wrist and reduced ulnar and / or radial deviation so as to reduce injury and allow application of full strength to the exercise machine. The exercise machine ergonomic handle system generally includes a longitudinally extending frame, a carriage that moves upon a first longitudinal portion of the frame, and at least one pair of ergonomic handles positioned on a second longitudinal portion of the frame. The ergonomic handles rotate about an axis to prevent flexion and / or extension, and can be positioned at a width and / or angle that reduces ulnar and / or radial deviation.

A holder for replaceable tools and having a body with an opening along a longitudinal axis for snugly and individually receiving various tools. Two balls are on the body for engagement with the tools, and there is a projection into the opening for contacting the tool in a location diametrically opposite the location of the balls. A sleeve member is slideable on the body, and has two sets of camming ramps and cylindrical surfaces extending radially over the balls for controlling the radially location of the balls relative to the tool. The tool has a surface for abutting the body projection to thereby hold the tool free of radial deviation relative to the holder axis.

The invention discloses an upper limb joint movement degree measuring method based on a Kinect sensor, comprising measuring projects of measuring shoulder joint buckling / stretching and adduction / abduction, elbow buckling / stretching, upper limb palmarflexion / dosal flexion and radial deviation / ulnar deviation and the like. In a measuring process, a sensing man-machine interaction manner is adopted and a position of each joint of an upper limb is captured through the Kinect sensor according to the movement of the upper limb of a detected person, so as to record, calculate and feed back joint movement degree information in real time, automatically finish measurement and directly obtain a measured result in real time; and therefore, the operation is simple and convenient. A user can select measurement projects by oneself; and in each project, the user can execute the movement of the upper limb according to an initial body position for promoting accurate measurement. When the executing movement does not accord with measurement requirements, a system has an error, and prompts and corrects unreasonable movement and postures by the user in time.

The invention relates to a separated-type wave foil dynamic pressure gas thrust bearing capable of bearing certain axial load. The separated-type wave foil dynamic pressure gas thrust bearing comprises a bearing chassis, flat foil sheets, wave foil sheets and a gasket, wherein the circle of the bearing chassis is divided into a plurality of parts by clearances along the radius direction; the flat foil sheets and the wave foil sheets are inserted into the clearances; the gasket is inserted into a rectangular groove in the bearing chassis; a screw is screwed in a threaded hole at the rear part of the bearing chassis, and presses the gasket tightly so as to fix the foil sheets; the rigidity of the separated-type foil sheets can be changed along the radius direction and the circumference direction; the rigidity characteristic is beneficial to the adaptation of nonuniform pressure distribution for the bearing caused by velocity differences along the radius direction, so that the pressure can be homogenized, and the foil sheet deformation can be harmonized, and the bearing loading capability can be improved; slits among foil belts can ensure that the foil sheets prevent thermal deformation caused by nonuniform temperature distribution, and also can ensure that the bearing is adaptive to less axial deviation; the foil belts are connected integrally at free ends, and the damage on pressure air membrane surfaces caused by radial deviation of the foil sheets can be prevented.

The invention relates to a helical milling device and a helical milling method, and belongs to the technical field of machining. The device mainly comprises a helical feed mechanism (1100) used for realizing the axial feeding and revolution of a cutter (1303), a radial deviation mechanism (1200) used for adjusting the revolution radius of the cutter (1303) relative to axes of pores and a rotation mechanism (1300) used for driving the cutter to rotate. The device and the method of the invention can greatly improve the manufacturing quality and machining efficiency of complex pore series on surfaces of large-scale workpieces.

The invention relates to a portable device for accurately repairing the wavy abrasion of a steel rail of a subway curve. The portable device comprises a laser distance measuring sensor (9), a grinding assembly (7), a driving assembly, a control assembly and a detachable machine frame, wherein the laser distance measuring sensor (9) detects the wavy abrasion of the steel rail of the subway curve, the grinding assembly is used for repair, the driving assembly and the control assembly drive the grinding assembly (7) to move in the X-axis direction, the Y-axis direction and the Z-axis direction, and all the components of the device are installed on the detachable machine frame. Compared with the prior art, the portable device can be installed on site and is manually pushed to move, for a designated spot, the portable device can actively and accurately repair the wavy abrasion of the steel rail of the subway curve, when the radius of curvature of the steel rail of the curve is small, radial deviation compensation can be accurately considered, re-forming can be easily and repeatedly conducted, the grinding assembly can move in the direction of the rail and in the radial direction of the rail and can accurately ascend and descend, the included angle between a grinding wheel and the steel rail can be adjusted, and the portable device has the advantages of being convenient to use, high in efficiency, low in cost, high in precision and the like.

The invention relates to a method for measuring the out-of-roundness degree of a tire, and measures and calibrates by aiming at the parameter of the outline of the tire, thereby visually and synthetically detecting the index of the out-of-roundness degree, and the invention also provides for the processing quality department to analyze the geometric distortion degree of the tire. During the process of the tire molding, for a tread bracing layer, the deforming of a tread of tire and the nonuniformity of the thickness of the tire wall leads the convex and the concave of the tread of tire are affected, the out-of-roundness degree of the tire which is formed by material and manufacturing process is set, and the necessarily detecting parameters which is embodied during the process of detecting of the out-of-roundness degree of the tire comprise a top lateral deviation, a top radial deviation, a central radial deviation, a bottom radial deviation, a bottom lateral deviation, a top bulge, a bottom bulge and a bottom concave value.

The invention discloses a fine milling cutting force simulation predicting method considering the tool runout influence. Aiming at micro-milling cutter cutting edge trochoid motion track calculation, on the basis of a tool coordinate system and a machining process geometric model, tool axis radial deviation and tool axis inclination are fully considered, and theoretical instant non-deformation chip thickness models are established for cutting edges at different positions based on an actual tool trochoid motion track; and cutting force prediction models are established in a shear effect leading cutting region and a plough effect leading cutting region separately based on a micro-milling cutter side edge shear effect, a micro-milling cutter side edge plough effect and a micro-milling cutter bottom cutting effect. The influences of tool runout, a cutting edge size effect and a bottom edge cutting effect are fully considered, and strong support is provided for reasonable optimization of cutting machining parameters while the cutting force prediction precision in the fine milling process is improved.

The invention discloses a differential screw hole-making device and a method, belonging to the technical field of flexible machining equipment. The device mainly comprises a differential screw feeding mechanism, a rotating mechanism and a radial deviation adjusting mechanism, wherein the differential screw feeding mechanism realizes the screw motion of a cutter bar; the rotating mechanism drives the cutter bar to rotate; and the radial deviation adjusting mechanism adjusts the deviation of the cutter bar relative to the axis of a support sleeve. The method is characterized in that during hole making, the screw motion of the cutter bar is controlled by the differential screw feeding mechanism, and the rotation of a cutter is realized by the rotating mechanism. Through the radial deviation adjusting mechanism, the cutter bar can be adjusted according to the aperture of the hole to be made relative to the revolution radius of the support sleeve, and the axial feeding can be realized easily through the addition of the differential combination screw. Therefore, the device and method can be used for mass production of hole making for difficult machining materials such as titanium alloy and carbon fiber reinforced composite materials. In addition, the device has high degree of integration and light weight, and can be used as a tail end execution unit of an automatic hole-making system of a robot. The device and method can greatly improve the hole-making quality and efficiency of parts difficult to machine.

The invention discloses a walking aid lower limb of an exoskeleton robot. The walking aid lower limb comprises a first actuator fixing part (1.1), a thigh rod (1.2), a bionic knee-joint (1.3), a shank guard board (1.4), a shank guard board fixing part (1.5), a shank rod (1.6), a shank guard board connecting piece (1.7), a second actuator fixing part (1.8), and an actuator (1.9). The invention provides a walking aid lower limb of an exoskeleton robot, combined with a crossed four-bar linkage structure, a bionic mechanism which accords with physiological movement characteristics of human knee joints is designed. The walking aid lower limb can eliminate harmful applied forces generated by man-machine offset, and solves problems of radial deviation and tangential rotation offsets generated by man-machine system microscopic offset along a shank, so as to improve use security and wearing comfortableness of a rehabilitation exoskeleton.

The present invention discloses an alignment system for calibrating a position of an optical fiber (30) in a bore of a ferrule (20), comprising: an outer cylinder alignment element (100) for calibrating a center position of an outer cylinder of the ferrule (20), so that the center of the outer cylinder of the ferrule (20) is aligned with a center of the outer cylinder alignment element (100); a fiber core alignment element (300) comprising a fiber core (302) having a center aligned with the center of the outer cylinder alignment element (100); an optical vision system (411, 412, 421, 422) for identifying a center position of a fiber core (32) of the optical fiber (30) and the center position of the fiber core (302) of the fiber core alignment element (300); and a controlling and moving system for actively adjusting the position of the optical fiber (30) in the bore of the ferrule (20) under the guide of the optical vision system (411, 412, 421, 422), so that the center of the fiber core (32) of the optical fiber (30) is aligned with the center of the fiber core (302) of the fiber core alignment element (300), and so that the center of the fiber core (32) of the optical fiber (30) is aligned with the center of the outer cylinder of the ferrule (20), eliminating the insertion loss of the ferrule (20) due to a radial deviation between the center of the fiber core (32) of the optical fiber (30) and the center of the outer cylinder of the ferrule (20).

In view of the problem that a magnetically coupled resonant wireless energy transmission system is greatly reduced in transmission efficiency when suffering from coil deviation, and that in the practical application of the magnetically coupled resonant wireless energy transmission system, it is harsh to completely align the coil, and especially in special fields such as medical implantation, household appliances, underground coal mines and the like, it is almost impossible to completely align the coil, the invention provides a method for optimizing the efficiency of the magnetically coupled resonant wireless energy transmission system during the deviation of a coil. The method divides the deviation between the coils into radial deviation and angular deviation, optimizes the transmission efficiency by adjusting the angular deviation between the coils when the radial deviation occurs between the coils of the magnetically coupled resonant wireless energy transmission system, and optimizesthe transmission efficiency by adjusting the radial deviation between the coils when the deviation occurs between the coils. The method can be applied to the magnetically coupled resonant wireless energy transmission system in which a coil deviates, can well optimize the transmission efficiency of the system and meets the power supply stability of the device.

The invention discloses a three-dimensional scanning device for a suspension insulator. The novel three-dimensional scanning device for measuring parameters of disk diameter, axial deviation, radial deviation and creepage distance and the like comprises a main body framework, a suspension device, a power system, a laser ranging device and a data processing portion. The three-dimensional scanning device is characterized by, carrying out scanning by utilizing the laser ranging device to obtain three-dimensional physical characteristics of a contour of the suspension insulator, reconstructing a three-dimensional model and indirectly measuring some parameters of the suspension insulator; scanning the suspension insulator for many times by utilizing the laser ranging device and transmitting the obtained data to a computer; carrying out data processing to obtain three-dimensional model point cloud data of the suspension insulator, and then, carrying out reverse reconstruction of the three-dimensional model of the suspension insulator in the computer based on the point cloud data; and finally, carrying out analysis on the reconstructed three-dimensional model to obtain the parameters directly.

The invention discloses a wrist joint motion function evaluation and rehabilitation robot, which realizes all motion forms of a wrist joint according to a human wrist joint skeleton structure and canbe a structure of adjusting equipment for patients with different forearm lengths and different wrist lengths. An elbow position adjusting mechanism is fixedly connected with a support, and a wrist joint ring rotating mechanism, a wrist joint ring rotating axis adjusting mechanism, an ulnar and radial deviation driving mechanism, a metacarpal dorsiflexion driving mechanism and a tail end grabbingmechanism are connected to the end of the elbow position adjusting mechanism. A grab handle of the tail end grab mechanism can be separated from equipment, a gyroscope is arranged in the grab handle,and when the grab handle is separated from the equipment, the movement range of the wrist joint of a patient can be measured through the grab handle; when the grab handle is spliced on the equipment,the human-computer interaction acting force between the patient and the equipment can be measured by utilizing the grab handle. The robot structure is suitable for different patients, evaluates the motion function states of the patients, and achieves personalized and quantitative rehabilitation evaluation and training of wrist joint motion function evaluation and rehabilitation.

The present device relates to an apparatus and a method for allowing a golfer to properly grip a golf club. A proper grip is one that allows for the most efficient radial deviation (abduction) and ulnar deviation (adduction) as well as flexion and extension of the wrist of the golfer's upper hand, while also minimizing club head and shaft axis rotation during a golf swing. This grip can be achieved through the use of a marking system comprising the golfer's glove and the grip of the golf club. By matching one or more markings on the glove, placed in specific locations on its anterior, with one or more markings located on specific positions on a golf club grip, the proper location of the golfer's upper hand can be found and the proper grip can then be made.

The invention relates to a detection device for an acting force between an automobile tyre and a load wheel. The detection device comprises a load wheel, a sensor and a sensing system signal processor. The load wheel is close to a tyre as a driven wheel of the tyre. The sensor collects a radial force and lateral force between the load wheel and the tested tyre and sends the collected forces to the sensing system signal processor. The sensor comprises an X-direction differential capacitive unit group and a Y-direction differential capacitive unit group. The X-direction differential capacitive unit group and the Y-direction differential capacitive unit group comprise more than two capacitive unit modules forming differential action respectively. Each capacitive unit module has a comb-shaped structure composed of more than two strip-shaped capacitive units. The detection device measures the radial force and the lateral force between the tyre and the load wheel, through the two parameters, analysis of parameters of radial force fluctuation, lateral force fluctuation, conicity, sideslip, radial deviation, lateral deviation and the like is carried out. Nonuniformity of the tyre is calibrated scientifically.

The invention discloses a magnetic field structure for a magnetic induction gear encoder. The magnetic field structure comprises a gear encoding disc and an inductive head, a sensor and a permanent magnet are installed in the inductive head, the sensor is located right above the tooth top of the gear encoding disc, the axial deviation between the permanent magnet and the center line y of the sensor inside the inductive head is t, the t is smaller than or equal to 5 mm, the radial deviation between the side, with the edge close to the sensor, of the permanent magnet and the center line z of the sensor is h, the h is larger than or equal to -3 mm and smaller than or equal to 3 mm, a skewing angle formed between the end face of the permanent magnet and the xy plane is alpha, the alpha is larger than or equal to -38 degrees and smaller than or equal to 38 degrees, a skewing angle formed between the end face of the permanent magnet and the xz plane is beta, and the beta is larger than or equal to -36 degrees and smaller than or equal to 36 degrees. By means of the magnetic field structure for the magnetic induction gear encoder, the encoder sensitivity is higher, the accuracy can reach the level that the module0.3 can be accurately distinguished, and the tooth distance capable of being distinguished is smaller than or equal to 0.94 mm; compared with an encoder with the same resolution ratio, the size is smaller, the structure is more compact, the externally-expressed magnetism is weaker, scrap iron is not prone to being absorbed, and a scrap iron protection device is avoided.

The invention provides solar flare TDOA (Time Difference Of Arrival) measurement, anintegrated navigation method and an integrated navigation system, which belong to the field of spacecraft autonomous navigation. The solar flare TDOA measurement comprises the following steps of acquiring flare arrival time directly from the sun and flare arrival time reflected by the Mars; calculating a difference value between the two flare arrival times; building a solar flare TDOA measurement model. The integrated navigation method comprises the following steps of building a direction-findingnavigation model, building the solar flare TDOA measurement model, utilizing a filter to filter, and adopting the direction-finding model when the solar flare TDOA is not acquired. The solar flare TDOA measurement, and theintegrated navigation method and theintegrated navigationsystem provided by the invention solve the problem of large radial deviation of direction- finding navigation, are high in positioning precision, and have lower requirement on an instrument and ephemeris. Therefore, the solar flare TDOA measurement, and the integrated navigation method and the integrated navigation system provided by the invention has the important practical significance on spacecraftautonomous navigation.

The invention discloses a method and a device for measuring the radial deviation of a metal tank. According to the method, a wall climbing robot drags and carries an optical pentagonal prism, which can achieve a good optical reflection effect and is controlled by a corresponding electric control system to make the robot walk upwards and downwards along the bus direction of the metal tank wall and to automatically position the measurement points. An electronic total station is utilized to track the pentagonal prism so as to automatically perform range finding when the robot arrives at the various set measurement points and to realize radial deviation measurement with higher precision and wider applicability. The design of the invention is innovative and reasonable. Highly intelligent, the device works reliably and safely. The method and the device are completely suitable for occasions with explosions and dangers. Convenient and flexible to operate, the method and the device can reduce the labor intensity greatly, therefore, increasing the measurement efficiency. In addition, with the method and the device, the automation degree for radial deviation measurement of oil tank can be increased so as to better meet the requirements illustrated in the check regulations of JJG168-2005 Stand-up Metal Tank Capacity, therefore, making the method and the device of good prospects for wide promotions.

The invention relates to a stripe image converter tube racking tool, which comprises a pair of circular tube formed by mutually buckled, a first end cover and a second end cover arranged on two ends of the circular tube, and a first locating device and a second locating device arranged coaxial to the circular tube, wherein annular steps with the number being equal to the number of electrodes in an image converter tube are arranged on an inner wall of the circular tube; axial positions of the annular steps are determined according to positions of the electrodes in the image converter tube; and inner holes of the annular steps are matched with the matched electrodes. According to the racking tool, the position accuracy including axial deviation, radial deviation, coaxiality and the like in a stripe tube racking process can be improved; an uncontrollable process link and manual operation are reduced, so that the consistency of racking is improved; and the efficiency for manufacturing stripe tubes and the yield are improved.

The invention discloses an endovascular anchoring catheter. The endovascular anchoring catheter includes a hollow catheter body and an anchoring member arranged on a distal end of the catheter body. The anchoring member expands radially outward from the catheter body in a natural state. The anchoring member is provided with a through hole which is coaxial with an opening at the distal end of the catheter body. The anchoring member is provided with at least one aperture axially passing through the anchoring member. The cavity of the endovascular anchoring catheter provides an access for other instruments. An anchoring device at the distal end of the catheter can limit radial deviation of the catheter and the instruments in the catheter and does not affect normal circulation of blood of a vessel in which the endovascular anchoring catheter is placed.

The invention discloses a wrist joint rehabilitation device self-adaptive to changes of a human motion axis, and the flexibility of the rehabilitation device is improved by adopting a mode of motor driving and rope transmission, autonomous adjustment can be performed according to a wrist-hand size of a user, so that the movement axis of wrist rotation of the patient coincides with the axis of equipment rotation, and the comfort of the equipment is improved; according to the device, the driving axis of the device can be adaptively adjusted according to a skeleton structure and motion characteristics of the human wrist joint and is always parallel to the motion axis of the human wrist joint, so that the safety of rehabilitation training is improved; the wrist joint rehabilitation device canbe self-adaptively used for different patients, the number of degrees of freedom, namely the flexion and extension degree of freedom, the ulnar and radial deviation degree of freedom and the rotationdegree of freedom, required by rehabilitation training is met, and three-degree-of-freedom coupling movement of the wrist joint is achieved. The joint axis offset generated by relative movement of bones can be compensated, and the joint axis offset can change along with the self-adaptive human body movement axis of the joint movement axis of the user.

The invention relates to the technical field of aero-engine assembly and manufacturing, and provides a riveting device and method for locking a bearing case assembly and a liner assembly. The device comprises a large positioning ring, a medium positioning ring and a small positioning ring which are matched with a bearing case spigot, the outer side wall of a spacer liner and the inner side wall ofa liner separately, a tray for jacking the heads of rivets, an ejector rod for jacking the lower end face of the spacer liner, a pressing plate which is vertically adjustable and rotatable, and centers. In the method, firstly, the three positioning rings are utilized for achieving automatic centering of the assemblies; the pressing plate is utilized for driving the two radially symmetric centersfor extruding the two symmetrical rivets till deformation is qualified; and then the pressing plate is rotated for pressing the next set of rivets. With the riveting device and method, automatic centering of a bearing case, the liner and the spacer liner can be achieved, and simultaneous counter-point load application can be achieved, so that the assemblies are stressed uniformly and are free of radial deviation in the riveting process, and the riveting design requirement of the combination is ensured.

The invention provides a ceramic bearing reaction kettle which comprises a kettle body, a power plant, a power transmission device, a shaft coupling, a stirring shaft and a stirrer. The ceramic bearing type reaction kettle is characterized in that a base supporting bearing consisting of a kettle body base plate, a support rack, a ceramic shaft, a ceramic ring and the stirring shaft is arranged toform an antifriction bearing operating mode by taking the stirring shaft as an inner ring, the ceramic shaft and the ceramic ring as ball bearing, the support rack as a ball bracket and the reaction caldron base plate as an outer ring. The invention prevents the oversize radial swing of the stirring shaft during operation, avoids the radial swing of the stirring shaft exceeding the permitted radial deviation of the sealed position of the stirring shaft, plays a role in avoiding swing, ensures the safe operation of the stirring reaction kettle, is provided with a base support device without lubrication and prolongs the service life of the base support by utilizing the wearable performance of ceramic, and simultaneously, a planetary type structure is suitable for reaction media containing solid materials.

Handles allow hand tools, implements or other utensils to operate within their arc of natural use, motion and attack without requiring extension, flexion, radial deviation, or ulnar deviation of the wrist from the neutral plane of the forearm. The preferred embodiments further include a grip shaped to increase the effectiveness of the tool and minimize antagonism between muscles and tendons of the wrist, forearm and upper arm, while maximizing the effectiveness of the gripping force delivered to it by the user. Maintaining the wrist and forearm in a neutral position increases a tool user's potential strength by increasing the synergy between large muscles of the forearm and upper arm and shoulders. It also decreases compression of the tendons and nerves in the carpal tunnel and between the wrist and forearm. Grips according to the invention preferably conform in shape, diameter and dimensions to the physical architecture of the hand such that grip tension and compression of the tendons in the wrist and forearm is optimized, minimizing the compressive force on the small muscles, tendons, and ligaments of the fingers, hand, wrist, and forearm, while maximizing the contributive effectiveness of the larger muscles of the forearm, upper arm and shoulder.

A machine for exercising and rehabilitating the rotator cuff muscles that allows the user to easily isolate and manipulate, from a standing position, the internal and external rotation of the Rotator cuff with an outstretched arm, at any angle, to strengthen the Rotator Cuff muscles. Additionally it allows the user to strengthen the Pronation, Supination, Radial Deviation and Ulnar Deviation of the wrist.The aforementioned machine is comprised of a main rotating handle apparatus that consists of a gear joint, a ratchet mechanism and an angle adjustment pin. The handle is secured to linear rails that allow for height adjustment. The main rotating handle apparatus is connected to a stack of weights for resistance via a rubber coated steel cable and pulleys as well as connected to two counter weights via rubber coated steel cables and pulleys that relieve the weight of the handle for ease of adjustment.

The invention provides an enlarged type elastic coupling for a metal diaphragm. According to the enlarged type elastic coupling for the metal diaphragm, the good compensation effects of the axial deviation, the radial deviation and the angular deviation between a driving shaft and a driven shaft can be played, the shaft hole inner diameter of an input shaft is not equal to that of an output shaft, the structure is simple, and the cost is low. The enlarged type elastic coupling for the metal diaphragm comprises the input shaft, the output shaft, a first intermediate shaft, a second intermediate shaft and metal diaphragm assemblies. The input shaft, the first intermediate shaft, the second intermediate shaft and the output shaft are coaxially arranged in sequence. An input shaft flange plate, a first intermediate shaft flange plate adjacent to the input shaft flange plate and the metal diaphragm assembly between the input shaft flange plate and the first intermediate shaft flange plate are all connected through bolts. The first intermediate shaft flange plate, a second intermediate shaft flange plate adjacent to the first intermediate shaft flange plate and the metal diaphragm assembly between the first intermediate shaft flange plate and the second intermediate shaft flange plate are all connected through bolts. The second intermediate shaft flange plate, an output shaft flange plate adjacent to the second intermediate shaft flange plate and the metal diaphragm assembly between the second intermediate shaft flange plate and the output shaft flange plate are all connected through bolts. The input shaft, the first intermediate shaft, the second intermediate shaft and the output shaft are all hollow shafts. The shaft hole inner diameter of the input shaft, the shaft hole inner diameter of the first intermediate shaft, and the shaft hole inner diameter of the second intermediate shaft are sequentially increased. The shaft hole inner diameter of the output shaft is larger than that of the input shaft.