70 results about "Spherical motion" patented technology

A sealing apparatus is disclosed that includes a housing that is mountable to an elongate shaft which includes an axial lumen. A sealing member defines a cavity and has at least a portion thereof disposed within the housing. The cavity is spherically moveable relative to the elongate shaft. The housing may define a passageway communicating with the cavity and the axial lumen. An inner surface of the housing can define at least a portion of a pathway configured for movement of the sealing member. The sealing member may include an end portion defining a moveable limit within the pathway. The sealing member may be fixedly mounted to a portion of the housing such that the cavity and the portion of the housing are correspondingly spherically moveable relative the elongate shaft. A sealing element having at least a portion disposed within the housing may moveably support the sealing member. The sealing element may cooperate with an inner surface of the housing to define at least a portion of the pathway. The sealing element may include a resilient portion configured to bias the sealing member relative to a longitudinal axis of the elongate shaft. The sealing member can be biased to a centered position relative to the longitudinal axis and in substantially coaxial alignment therewith. In an alternate embodiment, the sealing member is mounted to the housing and the housing may be configured for substantially spherical movement relative to the elongate shaft and / or substantially lateral movement relative to the longitudinal axis of the elongate shaft.

This document discusses, among other things, a mechanism for providing motion having two degrees of freedom and centered on a single point within a sphere. Methods to design the mechanism consistent with specified parameters are also described.

A space five-FOD (Degree of Freedom) mechanism for independently controlling rotational motion and translational motion comprises a rack, a first motion fork chain, a second motion fork chain, a third motion fork chain, a fourth motion fork chain, a fifth motion fork chain, a translational table and a spherical motion chain. The first motion fork chain, the second motion fork chain and the third motion fork chain together drive the translational table to carry out three-dimensional translational motion; the fourth motion fork chain and the fifth motion fork chain together drive the spherical motion chain to move, and the spherical motion chain can realize two-dimensional rotation around the centre of sphere. The translational motion and the rotational motion in the mechanism are independently controlled by different fork chains; the normal and inverse solutions in kinematics of mechanism are easy to solve; the mechanism is convenient to control; driving motors are all arranged on the rack; member bars can be manufactured into light bars; and therefore, according to the mechanism, the mechanism weight is efficiently reduced, the mechanism rigidity is good, the inertia is small, and the dynamic performance is good.

This document discusses, among other things, a mechanism for providing motion having two degrees of freedom and centered on a single point within a sphere. Methods to design the mechanism consistent with specified parameters are also described.

The invention discloses a stepless grinding and polishing device. The stepless grinding and polishing device comprises a main shaft and a revolution plate connected to the lower section of the main shaft. A plurality of grinding head installation positions are arranged on the revolution plate. A stepless grinding head is arranged in each grinding head installation position. Each stepless grinding head comprises a grinding head fixing base with a shaking space. Grinding blocks are connected with the lower ends of grinding wheel shafts. The middle sections of the grinding wheel shafts are provided with spherical motion pairs, wherein the spherical motion pairs are located in the shaking spaces, and gaps are reserved between the spherical motion pairs and the peripheral walls of the shaking spaces. The upper sections of the grinding wheel shafts are connected with the grinding head fixing bases in an elastic mode. In the working process, the grinding method that revolution and free rotation are integrated and the grinding blocks can rotate in all directions in the free rotation process is achieved for the stepless grinding heads, and therefore the surface of a plate to be machined can have a certain profiling function, the surface of the plate can not be easily pressed and damaged, the rough grinding and polishing effects are good, and work efficiency is high. The stepless grinding and polishing device is suitable for machining surfaces of building ceramics, stone materials and decorative plates.

A length-adjustable collapsible headphone includes a headband comprising an upper section, a right lower section, and a left lower section, the upper section comprising an inner headband arm and an outer headband arm, the right lower section and the left lower section each comprising a scissor arm assembly having an inner scissor arm and an outer scissor arm, each of the inner scissor arms and the outer scissor arms comprising slide adjustment sub-assemblies. A pivot joint connects the outer headband arm to the inner headband arm so that the outer headband arm and the inner headband arm can rotate freely around an axis of the pivot joint. A left and a right pivot assembly connects respective inner scissor arms to respective outer scissor arms that are aligned with the axis of the pivot joint so as to maintain a common centerpoint allowing the headphone to collapse in a spherical motion to a space efficient closed state. At least one earcup assembly connects to the headband with a yoke using a swivel joint that allows the earcups assembly to yaw around the axis of the swivel joint.

Robotized installation for the guided and controlled positioning and movement of a component or an instrument for diagnostic or surgical treatment at or around the head of a patient, whereby the installation includes a robotic device that forms a serial kinematic chain and carries component or instrument at its free and position-controlled end. The robotic device has three kinematic sub-assemblies that are mutually combined in series and include, a first sub-assembly in the form of a rotary-articulation mechanism corresponding to a serial-type, spherical kinematic arrangement with three degrees of freedom, a second sub-assembly in the form of a mechanism with linear translation along an axis, and a third sub-assembly in the form of a second rotary-articulation mechanism, integral with the moving part of the second sub-assembly and also corresponding to a serial-type spherical kinematic arrangement with three degrees of freedom.

The present invention provides an intelligent ball game training system, which includes a baffle and a load cell, wherein several load cells are evenly or non-uniformly distributed on at least one surface of the baffle. In another aspect, a control method of an intelligent ball training system is also provided, including step a. obtaining ball motion information through a data collector, wherein the ball motion information is used to indicate the motion parameters of the ball; step b. according to the generating training suggestion information based on the ball motion information; and step c. feeding back the training suggestion information. The present invention collects relevant motion information of the ball during the ball game process of the user through various data collectors in the intelligent ball training system, and generates corresponding motion suggestion information according to the motion information, thereby helping the user to achieve Better exercise effect. It is especially suitable for the indoor training of golf, and solves the problem that the long-range technical action cannot be trained due to the small indoor training field.

A mean radiant temperature sensor is used to measure radiant heat exchange to determine comfort. Disclosed herein are a spherical-motion average radiant temperature sensor (SMART Sensor) device or system, and an associated method, for taking an average overall global reading while also being able to record weighting for different directions easily in spherical coordinates.

A parallel spherical mechanism with two degrees of freedom for connecting a body to a fixed base in such a manner as to enable it to be oriented in three dimensions by turning about a first axis that is fixed relative to said fixed base, and about a second axis that is fixed relative to said body for orienting, these two axes intersecting at a center of spherical motion situated in said body for orienting, wherein: it comprises at least four links, each of said links being connected to said fixed base via a first connection point and to said body for orienting via a second connection point, and each link belonging to a first type or a second type, there being at least one link of each type, in which: in the link(s) of the first type, the first connection point is at any point of said fixed base, and the second connection point coincides with said center of spherical motion situated in said body for orienting: and in the link(s) of the second type, the first connection point lies on said first axis and the second connection point lies on said second axis, but does not coincide with said center of spherical motion; each connection point of said links lying on said first and / or second axis presents at least one degree of freedom in rotation about said axis.

The invention discloses a novel ankle joint rehabilitation parallel mechanism. The mechanism comprises a static platform, a movable platform, two UPU branched chains and an AABA-type branched chain; the parallel mechanism is provided with two non-coincident rotary spherical centers which are respectively a fixed spherical center and a movable spherical center; the whole parallel mechanism is regarded as that the movable spherical center performs spherical motion with two degrees of freedom around the fixed spherical center, and the movable platform performs spherical motion with one degree offreedom around the movable spherical center under the constraint of the three branched chains; rotation axes of rotary pairs respectively between the three branched chains and the static platform meetat a point which is the fixed spherical center of the parallel mechanism; rotation axes of rotary pairs respectively between the three branched chains and the movable platform meet at a point which is the movable spherical center of the parallel mechanism; each UPU branched chain is provided with a moving pair along the length direction of the UPU branched chain; the two UPU branched chains control the positions of the fixed spherical center and the movable spherical center in space; and a B-type connecting rod in the AABA-type branched chain controls the distance between the fixed sphericalcenter and the movable spherical center. The parallel mechanism has the advantages of lower manufacturing, processing and assembling precision, simpler and more compact structure and lower cost.

The invention discloses a two-degrees-of-freedom spherical motion platform. A pitching driving gear is mounted in a base; a rotation supporting body comprises an annular outer ring and an annular inner ring; the annular outer ring is fixedly mounted on the base; the outer wall of the annular inner ring is provided with external teeth which are meshed with the pitching driving gear; a pitching driving motor is capable of driving the annular inner ring to rotate around the own axis for 360 degrees by the pitching driving gear; the annular inner ring is fixedly provided with two rolling and connecting assemblies; rod parts of two ends of a spherical cabin are respectively mounted in the corresponding rolling and connecting assemblies by bearings; the rod part at one end of the spherical cabin is sleeved with a rolling driven wheel; a rolling driving wheel is arranged around the rolling driven wheel; the rolling driven wheel, the rolling driving wheel and the spherical cabin form a planet wheel transmission mechanism, a rolling driving motor drives the rolling driving wheel to rotate, and the rolling driven wheel drives the spherical cabin to rotate around the own axis for 360 degrees. According to the invention, the coupling is eliminated, the cost is reduced, the energy consumption and fault rate are reduced, and the maintenance interval time is prolonged.

The invention relates to a synchronous regulating device with inlet guide blades for a high-speed centrifugal fan, which comprises the guide blades, rotating arms, pin shafts, spheres, roller wheels, a rotating ring and a driving arm. Shaft necks of the guide blades are respectively installed in shaft holes uniformly distributed in the circumference at the upper part of an inner worm case to form a first rotating pair; one end of each rotating arm is fixedly connected with the shaft neck of each guide blade through a key, and the other end of the rotating arm is provided with a U-shaped groove and is connected with each sphere to form a spherical motion pair; the spheres are respectively and fixedly arranged in shaft holes uniformly distributed in the circumference of the rotating ring through the hinged shafts; shaft necks of the roller wheels are respectively installed the shaft holes uniformly distributed in the lower part of the inner worm case and form a second rotating pair; and the internal diameter of the rotating ring is respectively tangential to each roller wheel and forms a third rotating pair; and the driving arm is fixedly connected with the rotating ring through a bolt. The synchronous regulating device has the advantages of simple, compact and reasonable structure and low manufacturing cost and is suitable for high-speed centrifugal fans with various specifications.

The invention relates to a moving and supporting mechanism for observing the surface of a silicon chip, comprising a hollow supporting post which is vertically arranged and is driven by a horizontal motor to horizontally rotate, wing lugs respectively extend from the upper end and the lower end of the supporting post, a crank motor is fixed on the wing lug at the lower end, an output shaft of the crank motor is connected with a crank disc, the eccentric point of the crank disc is connected with a hollow link rod by a rotating shaft, a swinging handle of a sucking disc is pivoted between the two wing lugs which extend from the upper end of the supporting post, the front end of the swinging handle of the sucking disc is pivoted on the top of the link rod, an autorotation motor is arranged in a cavity of the swinging handle of the sucking disc, an output end of the autorotation motor is connected with a rotating shaft of the sucking disc, and the rotating shaft of the sucking disc extends out of the swinging handle of the sucking disc to be connected with another sucking disc; and vacuum air channels which are mutually communicated are arranged on the link rod, the swinging handle of the sucking disc, the rotating shaft of the sucking disc and the sucking disc. The sucking disc is driven by the motors of the mechanisms and can carry out rotation, revolution and pitching to form three kinds of composite spherical motion; and the invention solves the problems of pitching matitation and large-area adsorption, and can be widely popularized and applied.

The invention relates to a constant-speed universal coupling comprising a driving shaft (21), a driven shaft (22), spherical motion mechanisms (25) and a bisecting mechanism (28), wherein the constant-speed transmission of the driving shaft (21) and the driven shaft (22) at any included angle within a permitted angle range can be realized; two groups or more than two groups of the spherical motion mechanisms (25) are distributed in the circumferential direction of a bisector (83) of a supplementary angle of an included angle between the driving shaft (21) and the driven shaft (22); the spherical motion mechanisms (25) are connected with the driving shaft (21) through pins (23) to form driving shaft rotary pairs, and the central axes of the driving shaft rotary pairs are axes (A23); the spherical motion mechanisms (25) are connected with the driven shaft (22) through pins (24) to form driven shaft rotary pairs, and the central axes of the driven shaft rotary pairs are axes (A24); the spherical motion mechanisms (25) are connected with the bisecting mechanism (28) to form middle rotary pairs, and the central axes of the middle rotary pairs are axes (A28); other spherical motion mechanisms are respectively connected with the driving shaft (21), the driven shaft (22) and the bisecting mechanism (28) in same ways, the central axes of all formed rotary pairs are intersected on a point (30), and the central axes of all the middle rotary pairs are in a symmetrical plane (82) positioned between the driving shaft (21) and the driven shaft (22).

The invention, which belongs to the field of numerical control machine tool precision detection, discloses a rapid identification method for measuring a perpendicularity error of a numerical control machine tool based on a ball rod instrument, thereby solving problems of difficulty in mounting an experimental device, complex detection program, long detection time and the like in the conventional perpendicularity error detection method. With a three-axis linkage mode of a machine tool, a spherical motion trail of a ball rod instrument is designed to measure the perpendicularity error. Accordingto the invention, the numerical control machine tool error distribution geometrical characteristics are explained through an exponential product formula. Meanwhile, the detection path is optimized; the detection time is shortened; and the detection efficiency is improved.

The invention provides a light source mechanism capable of moving along a spherical track, belongs to the field of mechanical structures, and particularly relates to a uniform-illumination parallel light source device capable of directly emitting light rays from various angles. The light source mechanism can move along the spherical track through a two-dimensional moving mechanism, uniform parallel light sources capable of directly emitting light rays from various angles can be formed by combining light sources, and spatial positions of the light sources can be accurately controlled and positioned. The light source mechanism comprises the two-dimensional moving mechanism and a light source assembly capable of emitting parallel light rays, wherein an inner frame and an outer frame in the two-dimensional moving mechanism rotate around respective axes; the outer frame simultaneously drives the inner frame to rotate; the light sources circularly move in the X-axis direction and the Y-axis direction respectively, so that a spherical motion track is formed; light rays emitted from the light sources directly face a sphere center within a range of the motion track all the time, the distances from the light rays to the sphere center are equal, and consistency of illumination is kept. The position of a spherical center point of the spherical track of the light sources is changed by changing the positions of the light sources on a light source mounting plate.

The invention relates to a vibrating screen with spherical track, which belongs to the field of vibratory screening machinery. The vibrating screen can enable material particles to achieve spherical motion state on a screening surface, solves the problem of hole blocking by difficult-to-be-screened materials or critical particles, and increases the percent through screen. The vibrating screen consists of a screen box, a screen surface, a single-shaft vibration source, lateral vibration sources, an anti-vibrating spring and a support, wherein the single-shaft vibration source enables the screening box to move in circular motion track in the longitudinal plane; two lateral vibration sources with the same performance are symmetrically arranged on the two sides of the screen box, and rotate in the same direction to make the screen box generate a lateral circular motion track; and the vibration composition of the single-shaft vibration source and the lateral vibration sources makes the screen box generate a spherical motion track. The vibrating screen is used for the screening of difficult-to-be-screened materials, and is characterized by compact structure, stable operation and high screening efficiency.

The invention discloses a spherical gear and fluted disk mechanism comprising a continuous spherical gear and a discrete fluted disk. The continuous spherical gear is a hemispherical body, and the hemispherical surface of the continuous spherical gear is provided with a plurality of toothed slots; the discrete fluted disk is in a disk shape, and the disk body of the discrete fluted disk is provided with a plurality of convex teeth engaged with the toothed slots; and the continuous spherical gear can do spatial motion on the discrete fluted disk. One convex tooth of the discrete fluted disk ofthe spherical gear and fluted disk mechanism is inserted into one toothed slot of the continuous spherical gear, and three-degree-of-freedom motions of deflection, pitching and rotation around the axis can be achieved; and mutual transformation between planar motion and spherical motion can be achieved, and stable meshing transmission and no transmission principle error can be ensured through themeshing mode that the convex teeth of the fluted disk are inserted among concave spherical teeth.

The invention discloses a rope-driven wrist module based on a three-degree-of-freedom series-parallel hybrid mechanism. The wrist module is composed of a three-degree-of-freedom series-parallel module and a drive-control integrated module. The three-degree-of-freedom series-parallel module comprises a spherical pure rolling parallel mechanism and a tension amplification mechanism, the spherical pure rolling parallel mechanism realizes two-degree-of-freedom spherical motion of a wrist, a lower platform of the parallel mechanism is designed to have a rotational degree of freedom, so that the series-parallel hybrid mechanism is formed, and the tension amplification mechanism ensures that the mechanism is light in weight and does not lose rigidity at the same time; and the drive-control integrated module is used for integrating a motor, a driver and a controller to form an independent electromechanical system. The rope-driven wrist module is designed by combining the advantages of rope driving and modularization and has the advantages of being light in weight, reconfigurable, good in flexibility and the like, the degree-of-freedom configuration of the series-parallel hybrid mechanism is consistent with that of a real wrist, high-fidelity humanoid wrist movement can be achieved, and a new design thought is provided for humanoid service robot wrist design.

The invention discloses a displacement sensor for detecting spherical motion. The displacement sensor comprises a fiber coating layer, and a first fiber and a plurality of second fibers which are arranged in the fiber coating layer; the second fibers enclose the first fiber; the first fiber outputs laser; and each second fiber receives the laser. The displacement sensor can conveniently detect the displacement of the relative motion of a spherical surface easily and has a simple structure.

A parallel spherical mechanism with two degrees of freedom for connecting a body to a fixed base in such a manner as to enable it to be oriented in three dimensions by turning about a first axis that is fixed relative to said fixed base, and about a second axis that is fixed relative to said body for orienting, these two axes intersecting at a center of spherical motion situated in said body for orienting, wherein: it comprises at least four links, each of said links being connected to said fixed base via a first connection point and to said body for orienting via a second connection point, and each link belonging to a first type or a second type, there being at least one link of each type, in which: in the link(s) of the first type, the first connection point is at any point of said fixed base, and the second connection point coincides with said center of spherical motion situated in said body for orienting: and in the link(s) of the second type, the first connection point lies on said first axis and the second connection point lies on said second axis, but does not coincide with said center of spherical motion; each connection point of said links lying on said first and / or second axis presents at least one degree of freedom in rotation about said axis.

The invention provides an underwater structure impact resistance calculation method considering underwater explosion bubble jet slamming, and belongs to the field of underwater explosion bubble dynamics. Comprising the following steps: determining various initial parameters, establishing a bubble and structure coupling calculation model, and dispersing bubbles and structure surfaces; solving the rigid body motion of the structure, and simulating the bubble form and the structure motion; the induced load of the bubbles in the flow field is decomposed into a pulsation load generated by bubble pulsation and associated with the internal and external pressure difference of the bubbles and a jet flow load generated by the non-spherical motion of the bubbles and associated with the boundary motion of the bubbles, and the two loads are calculated with the assistance of an auxiliary function method; and two parts decomposed from the bubble load are respectively input into a finite element analysis program, and shock resistance calculation is carried out. According to the method, the complex bubble load is decomposed into the jet flow load and the pulsation load according to the characteristics, and the method for considering the bubble jet flow influence in the structure impact resistance calculation is provided, so that the impact resistance calculation result is more consistent with the reality.

The invention discloses a piezoelectric driving multi-degree-of-freedom spherical joint. According to the device, at least four two-dimensional piezoelectric actuators serve as power supply mechanisms, force and displacement / position output in the two-dimensional direction are provided through combined stacking, a pre-tightening device provides needed pre-tightening force through a flexible mechanism, and the pre-tightening force provides sufficient friction force for the actuators so as to provide execution thrust for the spherical motion joint. And under the structural assembly of the outer ring bracket and the fixed supporting device, the spherical joint rotor is actuated, so that the output shaft can provide high-precision positioning under the rotary motion. The piezoelectric actuating technology and the inchworm type motion control method are innovatively combined, a novel adaptive structure is provided, and long-stroke, large-output and high-precision displacement can be output without depending on a bearing. The practical application problem which cannot be met by a common electromechanical spherical joint is solved, and the requirement for ultra-precise motion control at the present stage is met. The invention has constructive significance for piezoelectric equipment in a new market of rotational motion.

The invention discloses a wrist structure of a spraying robot, and relates to the technical field of spraying robots. The front end of a large arm is rotationally connected with a support through a first connecting part to form a two-degree-of-freedom revolute pair; the tail end of the large arm is rotationally connected with a small arm through a second connecting part to form a one-degree-of-freedom revolute pair; the structure further comprises a wrist mechanism installed at the tail end of the small arm through the second connecting part; wrist joints comprise a first joint, a second joint, a third joint and a shell structure which are independently driven and move; and a three-degree-of-freedom rotation pair is formed in total. According to the invention, the axes of revolute pairs of the first joint, the second joint and the third joint of the wrist structure have no common intersection point and are in a novel oblique-crossing non-spherical motion mode; each joint is independently driven and transmitted; circumferential rotation can be achieved respectively; the motion flexibility is good; the motion trail coverage is comprehensive; and the device is particularly suitable for spraying operation of large components in narrow and complex environments.

The invention discloses an active implementation method for spherical motion detection. The method is characterized by including the following steps that a first joint, a second joint, a third joint,a fourth joint and a detector are sequentially connected and installed over a point light source, and the rotation axis of the first joint is made to coincide with the vertical optical axis of the point light source; the distance d between the point light source and the center point A of the second joint is calibrated; the first joint is rotated to make the detector conduct orientational rotation;and the second joint and the third joint are rotated to make the detector move on an arc with R as the radius and the point light source as the circle center, and the fourth joint is rotated to makea detection surface right face the point light source. The method has the advantages that a motion trajectory equation is established according to a trigonometric function, an accurate spherical motion trajectory is generated in a three-dimensional space, the spherical motion sphere diameter can be changed by adjusting the joint angle, and the application range is wide.

The invention relates to a follow-up radial top spray type shower head and discloses a spray head. The follow-up radial top spray type shower head comprises a top fixed seat, a spindle, a connecting frame rod mechanism and a spray head body. The spindle is connected below the top fixed seat. A water inlet channel is formed in the spindle. The spray head body is connected to the side portion of thespindle through the connecting frame rod mechanism. The spindle is provided with a motor I for driving the spindle to rotate. The connecting frame rod mechanism is provided with a motor II used for driving the spray head body to rotate in the vertical plane. The spray head body is provided with a water outlet pipe communicating with the water inlet channel in the spindle. A rotary joint connectedwith a fixed water inlet pipe is arranged on the water inlet channel. The follow-up radial top spray type shower head further comprises a master control module. The master control module is electrically connected with the motor I and the motor II. The spray head is controlled to rotate by 360 degrees around a human body and conduct radial spraying with some part of the human body as the center toform a spherical motion trail and can meet the requirements of different body heights. Moreover, the better and effective spray area can be obtained through the small-diameter spray head. The follow-up radial top spray type shower head has the higher water-saving ability.

The invention discloses a four-leaf grooved pattern trimmer, and belongs to the technical field of landscaping pruning. The four-leaf grooved pattern trimmer comprises a four-leaf rose curve generation mechanism and a spherical motion tracking mechanism, wherein a path generation motor 8 drives a guide rod lower section 1-2; and under the rotation of the guide rod lower section 1-2, a longitudinal slide block 4 and a transverse slide block 5 as well as a connecting rod 3, a cross guide block 2 has the track of a four-leaf rose line. A spatially three-dimensional four-leaf rose curve type motion is formed under the guide of a grooving motor connecting sleeve 7-10 and a grooving spherical guide shell 7-17; the grooving motor connecting sleeve 7-10 drives a grooving cutter 7-13 to complete trimming of four-leaf grooved rose patterns on the top of a single shrub. According to the four-leaf grooved pattern trimmer, the superficial area of the shrub receiving sunshine is relatively enlarged, a curved surface of the shrub reflecting noise is enlarged, and the reflection direction is changed, so that the vehicle noise is further reduced. Therefore, a driver in a high position feels the motion, and pedestrians can have a sense of spatial heterogeneity.

The present invention proposes an experimental device for selecting and shifting gears of a gearbox. The scheme is as follows: the connecting jig of the transmission control mechanism is fixed at the middle position below the frame, and two power sources performing linear motion are arranged horizontally at a certain angle on the frame. , the two power sources performing linear motion are respectively fixed on the frame through the universal floating elbow joint support mechanism, the output shaft of the power source performing linear motion is connected to the mechanical drive mechanism, and the outer end of the mechanical drive mechanism is fixed to the shift lever block connection. During use, the shift lever fixing block is fixedly connected to the upper end of the shift lever. In the present invention, through the universal floating of two power sources that perform linear motion arranged at a certain angle, two sets of mechanical drive mechanisms that can overcome the interference of degrees of freedom can jointly complete the spherical motion of the point, and complete the shifting of the shift lever of the speed change control mechanism. The action can truly simulate the manual operation, so as to realize the experimental purpose of the gearbox.