267 results about "Vertical angle" patented technology

The invention discloses a power transmission line foundation pit three-dimensional laser radar equipment error self-correction control method, and relates to the technical field of power transmission line construction, and the method comprises the following steps: firstly, defining the distance from three-dimensional laser radar equipment to a target point, a horizontal included angle and a vertical included angle based on a Cartesian coordinate system; determining an initial coordinate of the target point; secondly, selecting a reference control point, removing noise and gross error points, correcting offset in the vertical direction, and finely processing point cloud data; thirdly, defining errors in the X-axis direction, the Y-axis direction and the Z-axis direction, and establishing an error correction model; and finally, based on the observation value and an error correction model, carrying out self-correction on the target coordinate, and carrying out correction through an environment feature self-adaptive error weight distribution mechanism. According to the method, closed-loop iterative optimization is performed through a multi-level data verification mechanism, the measurement precision is ensured, the operation efficiency is improved, the environmental adaptability is enhanced, and the method is suitable for power transmission line foundation pit division operation under complex terrains.

The invention belongs to the technical field of engineering surveying, and particularly discloses a river-crossing leveling method and system.The method comprises the steps that four control points are arranged on the two sides of a water area to be measured, each control point is provided with a centering rod tool, and each centering rod tool is integrated with an upper-layer prism and a lower-layer prism with the preset fixed vertical distance; a first total station and a second total station are erected on the two banks of the water area, upper-layer prisms and lower-layer prisms arranged on centering rod tools on the opposite banks are observed synchronously and oppositely, and vertical angle and slant distance data of all observation targets are obtained; and based on the vertical angle and slope distance data, a preset fixed vertical distance is used as a checking condition, and the height difference between the target positions on the two banks is solved. According to the method, the double-layer prism tool is introduced into a physical forced closing check condition, and traditional quadrilateral geometric closing check is combined, so that the data redundancy and the reliability of results are greatly enhanced, and system errors can be effectively identified and separated.

The invention relates to the technical field of welding, in particular to a spacing adjustment working frame for steel structure profile welding, which comprises a base, a working box, a touch screen, a moving mechanism, a placing table, a limiting mechanism and a plumb aligner, the working box is mounted on the upper end face of the base, the touch screen is arranged on the side end face of the working box, and the moving mechanism is arranged in an inner cavity of the touch screen; a limiting mechanism is arranged on the inner side of each placing table; a plumb aligner is arranged at the edge of the upper end surface of the working box; a through groove is dug in the upper end surface of the working box; a distance detection mechanism is arranged on the opposite surface of each placing table; through the structure, the to-be-welded part is rapidly limited and positioned, the device can adapt to profiles of different types and sizes, the problem of poor adaptability is avoided, the vertical angle of the to-be-welded part is detected through the plumb aligner, and the accuracy of a welding path is improved.

The utility model discloses a lifting device for curtain wall construction, which comprises a carrier, an extension lifting arm and a sucker component, auxiliary devices are mounted in inner cavities at two ends of the carrier, a turntable is mounted at the upper end of the middle of the carrier, a base is mounted at the upper end of the turntable, the extension lifting arm is mounted on the base, and the sucker component is mounted on the extension lifting arm. A connecting frame is installed at the left end of the stretching lifting arm, an equipment base is rotatably installed at the other end of the connecting frame, a telescopic rod used for adjusting the vertical angle of the equipment base is rotatably installed between the connecting frame and the equipment base, a rotating device is installed at the upper end of the equipment base, and a suction cup assembly is installed at the left end of the rotating device. The problems that in the prior art, although a lifting device can meet the installation requirements of curtain walls with different inclination angles during use, a vacuum suction cup mechanism does not have an adjusting function in the use process, adjustment cannot be conducted according to the curtain walls with different sizes, and the applicability of the device is reduced are solved.

A non-vertical flow meter is provided that includes a chamber comprising an inlet and an outlet, wherein the chamber, the inlet and the outlet are disposed at a non-vertical angle. The non-vertical flow meter also includes a pivoting sensing surface and a load cell. The pivoting sensing surface disposed on an interior surface of the chamber, and the load cell is in operational communication with the pivoting sensing surface and arranged to sense pressure applied to the pivoting sensing surface and output a signal proportional to a flow rate of a material flowing within the chamber.

The utility model relates to the technical field of cameras, in particular to a binocular camera, which comprises a binocular camera body. The binocular camera body is provided with a vertical angle adjusting structure for adjusting the vertical angle, and the vertical angle adjusting structure comprises an arc-shaped machine shell movably arranged on the outer side of the binocular camera body in a sleeving mode. According to the utility model, the binocular camera body is mounted and positioned by adjusting the mounting hole of the side frame, so that the mounting process of the binocular camera body is simpler and quicker, an automatic horizontal calibration function can be set during shooting work, the image stability and accuracy in the shooting process are ensured, the horizontal sensor can monitor the horizontal state of the binocular camera body in real time, and the shooting efficiency is improved. And when inclination is detected, the electric telescopic rod can automatically extend or contract, so that real-time adjustment of the horizontal state is realized, the distance between the arc-shaped shell and the adjusting side frame can be flexibly adjusted through adjustment of the electric telescopic rod, and the horizontal state of the binocular camera body is further optimized.

The utility model provides a potted flower transportation packaging box, which relates to the technical field of potted flower transportation and comprises a cuboid-shaped shell, trapezoidal notches are arranged on the upper portions and the lower portions of four vertical angle edges of the shell, the angle edges can be folded inwards along the trapezoidal notches, and lifting pieces are fixed on the outer surfaces of at least two opposite angle edges. According to the potted flower transportation packaging box, stress can be more evenly distributed through the design of the trapezoidal notches, when the corner edges are folded inwards along the notches, the stress can be effectively dispersed through the shape, and material breakage or deformation caused by too high local stress is avoided; the notches are designed to be trapezoidal, so that more material connection areas can be reserved on the premise of not influencing the folding function, and the structural strength of the whole shell is improved.

The utility model relates to the field of construction lofting, aims to solve the problems that in the prior art, an instrument cannot realize inclined plane lofting, and a worker cannot accurately measure a horizontal or vertical angle, and provides a high-precision inclined plane lofting device which comprises a structure supporting system for adjusting the level, the top of the structure supporting system is movably connected with a laser emitting system used for horizontal and vertical plane lofting and inclined plane lofting. The laser emitting system is provided with a base, the top face of the base is rotationally connected with a U-shaped rotating frame, a rotatable and fixed laser emitter is clamped between two wings of the U-shaped rotating frame, a horizontal laser emitting opening is formed in the outer wall of the laser emitter, an angle displayer is arranged on the lower portion of the horizontal laser emitting opening, and the angle displayer is located on the outer wall of the laser emitter. And the angle display is electrically connected to the U-shaped rotating frame and the laser transmitter. The inclined plane lofting device has the advantages that accurate lofting of an inclined plane is conveniently achieved, and a worker can accurately locate the horizontal angle or the vertical angle.

The invention discloses an omni-directional form scanning device suitable for a large-size rock sample. The omni-directional form scanning device comprises a bearing table, a hydraulic lifting system, a scanning system and a computer system, the hydraulic lifting system comprises a first group of lifting devices and a second group of lifting devices; the scanning system comprises a scanning device mounted on the bearing table and arranged around the rock test piece and a scanning device arranged on the side of the rock test piece; each scanning device comprises a hyperspectral camera, a high-definition camera and a vertical angle adjusting device, and the computer system controls the first group of lifting devices and the second group of lifting devices to jack the rock test piece simultaneously or alternately; the computer system receives data shot by the hyperspectral camera, matches the data with a built-in mineral spectrum library, determines mineral types and analyzes mineral components on the surface of the rock test piece; data shot by the high-definition camera is subjected to data preprocessing and multi-view alignment to complete model reconstruction, and the shape of the surface of the rock test piece is analyzed. According to the invention, the structure of the morphological scanning device is optimized, and the precision of morphological model splicing is improved.

The application discloses a tunnel rock mass structure scanning system and a working method thereof. The tunnel rock mass structure scanning system comprises a rock mass scanning device, wherein the rock mass scanning device comprises a scanner, a horizontal adjusting device, a vertical adjusting device, a vertical angle adjusting structure and a hydraulic support. The fixed part of the hydraulic support is fixedly installed on the ground of a tunnel. The movable end of the hydraulic support is connected to the bottom of the vertical adjusting device. The vertical driving end of the vertical adjusting device is connected to the bottom of the horizontal adjusting device. The vertical angle adjusting structure is rotatably installed on the horizontal driving end of the horizontal adjusting device. The scanner is installed on the vertical angle adjusting structure and can rotate in the vertical direction through the vertical angle adjusting structure. In the scanning process, the hydraulic support can calibrate the levelness of the scanner. The horizontal adjusting device and the vertical adjusting device can jointly adjust the scanner to move to each preset detection point in sequence. The vertical angle adjusting structure can make the scanner rotate in the vertical direction on each detection point to comprehensively scan the measured rock mass.

A dual-light camera for evaluating the fusion quality of visible light and infrared images comprises a dual-light camera body, a horizontal angle adjusting mechanism and a vertical angle adjusting mechanism, the vertical angle adjusting mechanism comprises a U-shaped base, a rotating column and a motor, the dual-light camera body is connected to the U-shaped base through the rotating column, and the motor is connected to the horizontal angle adjusting mechanism. The dual-light camera body rotates by taking the rotating column as an axis, and an output shaft of the motor is rigidly connected with the connecting column; the horizontal angle adjusting mechanism comprises a base, a connecting column, a gear, an electric telescopic rod and a rack, the base is located below the U-shaped base, the upper end of the connecting column is connected with the U-shaped base, the lower end is connected with the base, and the gear is fixed to the outer surface of the lower end of the connecting column; the electric telescopic rod is installed on the upper surface of the base, the rack is installed on the electric telescopic rod, the rack is driven to linearly move through the telescopic action of the electric telescopic rod, and the rack is meshed with the gear. According to the invention, the vertical angle and the horizontal angle of the dual-light camera can be adjusted, and the angle adjustment is accurate and stable.

The present application discloses a method and a device for controlling a micro galvanometer of a solid-state LiDAR, and a solid-state LiDAR. The method includes acquiring a vertical angle range of a field of view scanned by the solid-state LiDAR, determining a first vertical angle of the field of view and a second vertical angle of the field of view corresponding to a preset ROI region of the solid-state LiDAR, reducing a slow axis scanning speed of the micro galvanometer to a first preset speed when it is monitored that the micro galvanometer scans the first vertical angle of the field of view, and adjusting the slow axis scanning speed of the micro galvanometer to a second preset speed when it is monitored that the micro galvanometer scans the second vertical angle of the field of view.

The utility model discloses an adjusting device for a teaching screen of a power concentration motor train unit structure, which comprises a base, a connecting plate and a body, and pulleys are fixedly arranged on the periphery of the bottom surface of the base; sleeves are symmetrically mounted on the surface of the top of the base, lifting assemblies are arranged in the sleeves, each lifting assembly comprises a threaded rod rotationally connected with the corresponding sleeve, and through cooperation of a rotating groove, a groove, a telescopic rod, a compression spring, a stabilizing block, a limiting ball, a rotating block, a circular groove, a sliding block and a limiting groove, the stability of the lifting assemblies is improved; the body can be adjusted in the left-right direction on the basis that the vertical angle of the body can be adjusted in the prior art, so that the angle of the body can be adjusted according to needs, and students can watch the body more conveniently to the maximum extent; the lifting of the body can be adjusted, so that the teaching experience of students can be improved.

The utility model discloses a device for controlling the drilling perpendicularity of a drilling machine, and relates to the technical field of drilling of drilling machines. The device comprises a crawler, a guide frame is hinged to one end of the crawler, a first electric push rod is hinged to one end of the crawler, follow-up sliding grooves are symmetrically formed in one end of the guide frame, follow-up sliding blocks are slidably connected into the follow-up sliding grooves, the output end of the first electric push rod is hinged to the follow-up sliding blocks, and a perpendicularity sensor is fixedly connected to one end of the guide frame. According to the drilling machine, when a first electric push rod is started to push a follow-up sliding block to eject out of a guide frame to rotate around a hinge shaft to be perpendicular to the ground, the drilling perpendicularity of the drilling machine body is monitored in real time through a perpendicularity sensor, and meanwhile when one end of the drilling machine body is driven to penetrate through a guide hole to be drilled into the ground, the drilling perpendicularity of the drilling machine body is monitored; one end of the drilling machine body is clamped and limited through the fixing assembly, so that the drilling precision of the drilling machine body is improved, and monitoring and guiding limiting of the vertical angle of the drilling machine body are conveniently achieved.

The utility model provides an electric power receiving device which comprises a charging main body, the charging main body is a cuboid which is composed of a bottom plate and a plurality of vertical plates vertically arranged on the edge of the bottom plate, the top and the side faces of the cuboid are open, and the interior of the cuboid is a charging space; the plurality of placing plates are rotatably connected to the charging main body, and the placing plates are distributed at equal intervals in the vertical direction; the plurality of receiving ends are placed on the placing plate; the damping rotating shaft serves as a turning axis, the vertical rotating angle ranges from 0 degree to 180 degrees, the receiving end is completely exposed in front of eyes, the receiving end can be visually observed, taking and placing are convenient, taking out and verification one by one are not needed, practicability is enhanced, meanwhile, the blocking strips are arranged, and the receiving end cannot slide out of the containing plate when the horizontal line inclines by about the vertical angle.

The present invention relates to a glazing system comprising a vehicle glazing (100), the glazing having a transmission window (111) in a near-infrared range and a diverging lens (20) having a first surface (21) and a second surface (22), opposite the first surface, the second surface (22) being intended to be oriented towards the outside of the glazing, at least one of said first and second surfaces, the diverging lens (20) having a first surface (21) and a second surface (22) being structured, the structured surface comprising a set of structures, in relief, concentric around said optical axis, and according to a radial section of the structured surface, the set of structures form an alternation of facets (210) and counter-facets (211).The diverging lens (20) is arranged and configured so as to receive said emission beam (70) from the LIDAR on the facets of the structures and all or part of the structures, called reference structures, each have facets at an angle Ak with respect to said plane of the diverging lens, the angle Ak of ​​the facets in absolute value increases with the radial distance, each having a height which varies with distance from the optical axis such that the external vertical angular aperture VFOV2 is greater than the initial vertical angular aperture VFOV1 and the external horizontal angular aperture HFOV2 is greater than the initial horizontal angular aperture HFOV1. Figure for the abbreviation: Fig. 1.

To provide an easy-to-use handrail.SOLUTION: A handrail comprises a panel, a corner vertical frame 2A, and a pressing edge 3A. The panel includes a pre-attached panel 11 and a post-attached panel 12, depending on the attachment sequence. The corner vertical frame 2A has a one lateral-surface-side visible surface 2A1 respectively facing one lateral surface (111, 121) of the pre-attached panel 11 and the post-attached panel 12, and a depth-facing surface 2A2 respectively facing the depth surfaces of the pre-attached panel 11 and the post-attached panel 12. The pressing edge 3A has an other-lateral-surface-side visible surface 3A1 respectively facing the other lateral surfaces (113, 123) of the pre-attached panel 11 and the post-attached panel 12, and a depth piece 3A2 facing the depth surface of the post-attached panel 12. The pressing edge 3A is mountable in a top-bottom reversible manner, and the depth piece 3A2 of the pressing edge 3A overlaps the depth-facing surface 2A2 on the post-attached panel 12 side, allowing the pressing edge 3A to be mounted from the other lateral surface onto the corner vertical frame 2A.SELECTED DRAWING: Figure 3

A training device for ball sports 1 comprises a launching section 3 comprising a pair of launch wheels 15, the launch wheels 15 having substantially parallel axes of rotation, and an adjustment mechanism 19 configured to adjust the vertical angle of launch of the launch wheels 15; a base section 2 supporting the launching section 3; the base section 2 comprising a base swivel 6 comprising an outer perimeter base 9 sized and shaped to provide a stable contact with the ground or other surface on which the base section 2 is resting, and at least one leg 10 connected to the outer perimeter base 9 and extending upwards to connect with and support the launching section 3 above the ground or other surface, the leg or legs 10 and launching section 3 mutually configured for rotational connection so that the base section 2 can freely swivel in substantially the horizontal plane.

The utility model discloses a multi-axis moving mechanism for intelligent welding, which belongs to the technical field of welding, and comprises a bottom plate and a welding piece placing disc, and a crank type three-degree-of-freedom moving mechanism is mounted at the upper end of the bottom plate; the crank type three-degree-of-freedom moving mechanism comprises a driving assembly and a movable supporting assembly. The driving assembly is installed at the upper end of the bottom plate. The lower portion of the movable supporting assembly is connected with the driving assembly, and the upper portion of the movable supporting assembly is connected with the welding piece containing disc. And an automatic centering clamping mechanism is mounted at the upper end of the welding part placing disc. Through cooperation of the driving assembly and the movable supporting assembly, the spatial position of a welding piece is continuously changed from multiple angles such as the horizontal angle or the vertical angle; and an additional positioning mechanism does not need to be arranged through the automatic centering clamping mechanism, it is guaranteed that all the welding pieces can be located at the set welding point positions, and the practicability of the device is improved.

This item is a bracket for fixing the end of a beam to a support post at the end of a safety fence, which allows the vertical angle of the beam to be adjusted.

The invention relates to the technical field of ship assembling tools, in particular to a web fixing device which comprises a fixing assembly, the fixing assembly comprises a supporting rod part, at least two clamping parts and a plurality of locking parts, the supporting rod part extends in the first direction, and the first direction is perpendicular to a web. The at least two clamping parts are arranged on the supporting rod part in a sliding mode so as to adjust the distance between the two adjacent clamping parts. Each clamping part is correspondingly provided with a locking part, and the locking parts can be connected with the supporting rod parts so as to lock the relative positions of the corresponding clamping parts and the corresponding supporting rod parts. According to the web plate fixing device provided by the invention, the clamping position is flexibly adjusted, so that the panel and the web plate are ensured to keep an accurate vertical angle during assembly, and the dimensional accuracy and the overall assembly quality of a T-shaped structure are improved.

The application provides a prism remote control system and method, a user terminal sends a control command to a server, a control terminal obtains the control command from the server and converts the control command into a control signal to send to a control device, the control device controls the working state of a stepping motor and a lifting motor respectively through the control signal to control the horizontal rotation and vertical rotation of the prism, so as to remotely adjust the azimuth angle and vertical angle of the prism. By using the application, the labor cost of control network re-measurement can be effectively reduced without affecting the application of other observation scenes of the prism and the accuracy of control network re-measurement results.

The application discloses a kind of angle measurement method, device, equipment and storage medium of double-inclined angle plate piece, the method comprises: the angle plate piece of two-way inclined structure in ship is modeled, respectively original near center line, original angle line and original upper edge line vertical projection in plan view, obtain vertical near center line, vertical angle line and vertical upper edge line, then horizontal projection to horizontal near center line, horizontal angle line and horizontal upper edge line, according to vertical near center line, vertical angle line and vertical upper edge line, and horizontal near center line, horizontal angle line and horizontal upper edge line construct the angle of angle plate piece angle line method surface angle, finally measure the degree of angle line method surface angle as the angle of angle plate piece. With the normal angle of double-inclined angle plate piece as processing basis, accurate reference is provided for angle rolling processing, the processing difficulty of double-inclined angle plate piece is reduced, the lofting development efficiency of double-inclined angle plate piece is effectively improved, and production cost is saved.

Method and system for mapping and / or inspecting an underground pipeline infrastructure, using: a sensor probe for collecting geospatial data while travelling through a pipeline of the pipeline infrastructure, and a driving mechanism comprising a tether, for driving the sensor probe, wherein the sensor probe is provided to enter the pipeline at a vertical angle through a live-fluid entry apparatus and once inside the pipeline make a 90° angle change of direction to align with the orientation of the pipeline.

This invention belongs to the field of bridge construction surveying technology, specifically a method for measuring the verticality of bridge tower piers at close range and with large inclination angles in mountainous areas. The method includes: S1, calculating the angle between the intersection hypotenuse and the vertical line of the tower pier based on the known elevation and measured slope distance of the measuring point at the top of the tower pier, then calculating the horizontal distance and solving for the first corrected coordinates of each measuring point, thus avoiding vertical angle observation errors under large inclination angles; S2, accurately measuring the actual distance between the measuring points of the two tower piers, and using this as a constraint to adjust the first corrected coordinates to obtain a high-precision second corrected coordinate for the center of the tower top; S3, calculating the verticality based on the second corrected coordinates of the tower top and the known coordinates of the tower bottom. This invention effectively overcomes the problem of low measurement accuracy caused by close-range, large-inclination angle observations in narrow mountainous terrain, eliminates the need for multi-layered control networks, improves measurement efficiency and accuracy, and reduces operational risks and costs.

This application discloses a beam configuration method, apparatus, and computer program product. The beam configuration method includes: determining a horizontal beam and a vertical beam, as well as the antenna's horizontal angle of arrival and vertical angle of arrival, based on each sampling point and SSB beam information in a measurement report; determining downlink simulated transmit angle information, including simulated downlink horizontal transmit angle and simulated downlink vertical transmit angle, based on the vectors of the horizontal and vertical beams; and determining the beam configuration based on the difference between the simulated downlink horizontal transmit angle and the antenna's horizontal angle of arrival, and the difference between the simulated downlink vertical transmit angle and the antenna's vertical angle of arrival. This application's embodiment, based on the sampling point data and SSB beam information in the measurement report data reported by the terminal, ensures greater accuracy of the data, thereby identifying whether the beam configuration is reasonable and improving the accuracy and adaptability of the beam configuration.

The utility model discloses a folding camera capable of rotating at multiple angles, and relates to the technical field of cameras. The device comprises a shell, the left side of an inner cavity of the shell is fixedly connected with a lifting mechanism, the right side of the lifting mechanism is fixedly connected with a positioning shell, the bottom of the positioning shell is fixedly connected with a first steering engine, and the top of the output end of the first steering engine penetrates through the positioning shell and is fixedly connected with a rotating shell. The use height of the positioning shell is adjusted through the lifting mechanism so that the positioning shell can move out of the inner cavity of the shell, the first steering engine drives the rotating shell to rotate horizontally, the second steering engine and the adjusting frame are in linkage to control the vertical angle of the camera module, the servo motor finely adjusts the orientation of the camera module through the fixing table and the control base, and multi-direction automatic rotating shooting is achieved. The conductive ring and the power connection contact ensure continuous power supply through the rotating disc, wire winding is avoided, the shooting range is expanded, and the problem that an existing mobile camera lacks an automatic multi-angle adjusting function is solved.

The invention discloses a skull base dura mater stitching instrument, and relates to the technical field of medical instruments, the skull base dura mater stitching instrument comprises a tube body and a handle, one end of the tube body is provided with a stitching head, the stitching head is internally provided with a stitching seat, and the stitching head is internally provided with a clamping assembly facilitating stitching; a stapling assembly for suturing the dura mater is arranged in the suturing head; a driving assembly used for providing a power source for the clamping assembly is arranged in the sewing base. According to the endocranium suturing device, pre-stretching force is applied to the to-be-sutured area of the endocranium to form a tension gap, so that accurate penetration of suturing nails is facilitated, and the situation that the endocranium cannot be sutured effectively is avoided; suturing nails which are pushed to the pressing gap by the first spring in the storage groove can be pressed at a 90-degree vertical angle through the pressing roller, so that rapid and efficient suturing work on the dura mater is realized.

The utility model relates to the field of propaganda display, and discloses multi-angle adjustable propaganda equipment which comprises a supporting plate, a plurality of mounting holes are formed in the supporting plate, the bottom of the supporting plate is fixedly connected with a supporting block, the right side of the supporting block is fixedly connected with a protection box, and the right side of the protection box is fixedly connected with a protective cover. A rotating device is arranged in the protection box, a connecting rod which penetrates through and extends to the outer side of the protection box and is rotationally connected with the protection box is fixedly connected to the interior of the rotating device, a connecting block is fixedly connected to the outer side of the connecting rod, and a mounting plate is rotationally connected to the right side of the connecting block; and a fixing device is fixedly connected to the interior of the mounting plate through a fastener, and the rotating device comprises a first motor fixedly connected to the outer side of the protection box. The multi-angle adjustable propaganda equipment has the advantages that the horizontal or vertical angle of the display board can be adjusted, and the display board is not easy to block.

The present application relates to a kind of beam end bidirectional telescopic device and telescopic method, and the driven sleeper and the driven sleeper of fixed transition plate two sides and fixed transition plate two sides are respectively provided with scissor linkage mechanism, the scissor linkage mechanism is adapted to the bridge with fixed transition plate, driven sleeper and driven sleeper together with the variation amount of beam joint width is ±800mm.It is characterized in that: (1) the scissor linkage mechanism is connected between the originality and the fixed transition plate with bidirectional hinge support, can adapt to the horizontal, vertical angle of beam end at beam joint, the whole mechanism rotates flexibly, and is not easy to jam;(2) driven sleeper is connected by bolt and link installation base, and moves freely along with link, and can prevent link foundation from being warped, guarantee the stability of the whole mechanism telescoping;(3) the link and the friction surface of link are provided with ultra-high molecular weight polyethylene small resistance wear pad, can minimize the rotating friction force of link joint, and the strength is reliable;(4) link joint connecting hole and base B connecting hole are provided with high-strength shaft sleeve, can maximize the resistance to shear stress from bolt or base pin.