29results about How to "Eliminate positioning errors" patented technology

This invention belongs to the field of additive-subtractive composite manufacturing technology, and discloses a five-axis linkage additive-subtractive composite machine tool and control system. The machine bed base assembly has left and right guide rail seats symmetrically fixed on both sides of its top. The worktable is fixed in the middle of the machine bed between the two guide rail seats. An integral crossbeam is mounted across the top surface of the left and right guide rail seats and can move linearly along the X-axis. Two independent machining units are mounted in parallel along the Y-axis on the integral crossbeam: the subtractive side crossbeam slide plate carries a subtractive slide block and a subtractive electric spindle actuator, and the additive side crossbeam slide plate carries an additive Z-axis slide table and a double-swing additive head. The worktable is divided along the X-axis into a subtractive-specific machining area, a composite machining area, and an additive-specific machining area. The two machining units can operate independently in their respective dedicated areas, or enter the composite machining area at different times to collaboratively complete the additive-subtractive composite machining. This invention combines high structural rigidity with machining flexibility, avoids secondary workpiece clamping errors, and significantly improves machining efficiency and accuracy.

This invention provides a system and method for the automatic assembly of screws on large antenna arrays. The system includes an assembly mechanism, which includes an end effector; a linear motion mechanism, on which the assembly mechanism is mounted and moves along a first horizontal direction under the drive of the linear motion mechanism; a lifting mechanism, disposed on one side of the linear motion mechanism along a second horizontal direction; the antenna array can move vertically under the drive of the lifting mechanism; a vision mechanism, fixed to the end effector, for acquiring feature images of screw holes on the antenna array; and a control unit, electrically connected to the linear motion mechanism, the lifting mechanism, the assembly mechanism, and the vision mechanism. The control unit controls the linear motion mechanism and the lifting mechanism to adjust the relative position of the end effector and the screw holes on the large antenna array, and completes the precise alignment of the end effector and the screw holes based on the feature images of the screw holes acquired by the vision mechanism, so that the end effector completes the screw tightening assembly.

This invention relates to the field of lawn maintenance technology, and discloses a fusion perception method, device, equipment, and medium suitable for autonomous mobile devices. By introducing dynamic inverse perspective transformation assisted by lidar, it achieves a visual image projected onto a three-dimensional real terrain. Combined with deep fusion of visual and lidar data, it generates a high-precision, semantically rich three-dimensional environment model. This model can effectively reflect the terrain undulations and obstacle distribution in complex lawn environments, achieving multimodal perception with good environmental adaptability and high real-time performance on a low-cost hardware platform, supporting accurate and safe navigation and efficient task execution for the autonomous mobile device. It breaks the strong assumption of an absolutely flat ground surface, utilizing real-time lidar data to construct a non-planar ground model, achieving deep fusion of visual and lidar information, thereby improving perception accuracy and robustness with low-cost hardware configuration.

This invention discloses a multifunctional analyzer combining CL-LIBS-LA-ICP-MS, comprising a laser optical path module, an electronic excitation system, a spectral detection module, a sample chamber, and a mass spectrometry detection module. The laser optical path module includes a laser source, a beam adjustment system, a scanning galvanometer, and a coaxial microscopic observation system. The spectral detection module includes a light signal collection end, an echelle grating spectrometer, a gated camera, and a timing control module. Another aspect of this invention discloses an analytical method, comprising setting the environment to vacuum and performing CL imaging scanning; selecting a LIBS test area based on the CL imaging scan image and performing LIBS scanning; selecting a third test area based on the LIBS scan results, filling the sample chamber with carrier gas, and performing laser ablation mass spectrometry detection. This invention eliminates the positioning error caused by sample transfer between multiple instruments during combined techniques, provides more comprehensive information on the structure and composition of the sample, and further improves the detection efficiency of the entire method through two screening test ranges.

The invention discloses an anomalous body positioning method and system combining borehole transient electromagnetic and geological radar, and relates to the technical field of mine safety detection, and the method comprises the steps: synchronously collecting the borehole transient electromagnetic data and geological radar data of an ore body to be analyzed, and generating a borehole transient electromagnetic imaging graph and a borehole geological radar imaging graph; two-dimensional coordinates of a target abnormal point in the borehole geological radar imaging graph are extracted, and the corresponding target apparent resistivity is determined; drawing an apparent resistivity contour map based on the target apparent resistivity in a target radial sectioning map of the borehole transient electromagnetic imaging map, and determining a plurality of candidate three-dimensional coordinates of a target abnormal point; at least one target feature point is selected from the borehole geological radar imaging graph, and the feature apparent resistivity corresponding to the target feature point is determined; and drawing a feature circle based on the target feature points, and screening the plurality of candidate three-dimensional coordinates to obtain coordinates of the geological anomalous body. According to the invention, the technical problem of insufficient positioning precision and reliability in the prior art is solved.

The invention discloses a heavy mud rod carrying truss manipulator, belongs to the technical field of heavy material automatic carrying equipment, and is suitable for automatic grabbing, carrying and accurate stacking of soft mud rod type cylindrical rod materials. The mechanical arm comprises an X-axis fixed frame body, a Y-axis movable frame body, a Z-axis lifting assembly, an R-axis rotation assembly, a wrapping and clamping gripper assembly and an electromagnetic band-type brake assembly, all shaft systems are of gear and rack transmission structures, and multi-axis linkage space precise movement is achieved; the electromagnetic band-type brake assembly detects the rotating speed through an encoder and is matched with gear and rack meshing to achieve Z-axis anti-falling braking, and potential safety hazards are eliminated. All driving, detecting and braking components are electrically connected with an external control system, full-automatic operation is achieved, the problems that traditional mud rod carrying is poor in adaptability, products are prone to being damaged, positioning is not accurate, and anti-falling protection does not exist are solved, and carrying efficiency and operation safety are greatly improved.

The utility model discloses a positioning frock for part processing relates to part processing device technical field, the utility model discloses a work table is provided with locking mechanism and centering clamping mechanism on, locking mechanism includes two U shape support plate fixedly connected in the work table bottom, two the U shape support plate between rotatoryly connected with pivot no.

This invention relates to the field of laser cutting technology and discloses a metal tube laser cutting device, including a guide rail, an auxiliary support device on one side of the guide rail, a metal tube placed on the auxiliary support device, a clamping and rotating drive mechanism, and a laser cutting mechanism. The laser cutting mechanism includes height-adjustable mounting seats located on both sides of the metal tube. A laser cutting head for cutting the sidewalls of the metal tube and a grinding head for grinding the ends of the metal tube are respectively mounted on opposite sides of the two mounting seats. This invention, by incorporating a laser cutting mechanism with grinding heads between two clamping and rotating drive mechanisms, allows the metal tube to undergo immediate end deburring via the grinding heads after laser cutting, eliminating the need for repeated clamping, effectively reducing process steps and improving production efficiency.

This invention relates to an endoscopic surgical navigation method and device based on video image augmented reality. The method includes: segmenting the key surgical areas of interest and selecting anatomical landmarks from preoperative CT images; installing passive tracking tools on the patient's surgical site and the endoscope; registering the real patient with a 3D model using calibrated probes and anatomical landmarks; calibrating the endoscope parameters under the navigation system; determining the transformation matrix of the passive tracking tool coordinate system relative to the endoscope coordinate system; projecting and rendering the 3D model of the preoperatively segmented key surgical areas of interest using a pinhole model simulation and processing it with distortion parameters to obtain a virtual image; and fusing the virtual image with images acquired in real time by the endoscope and displaying it. Compared with existing technologies, this invention fuses virtual images with real endoscopic images and presents them on the same screen, reducing the surgeon's intraoperative judgment time and lowering the difficulty of hand-eye coordination.

The invention relates to the technical field of satellite communication, and discloses a logistics transportation position monitoring method and system assisted by satellite communication. The method comprises the following steps: calculating a satellite-ground distance and a line-of-sight unit vector according to a satellite position coordinate and a terminal estimation position coordinate, and generating a baseband signal based on a three-axis speed component and the line-of-sight unit vector; calculating a target peak value based on the baseband signal, and when the target peak value exceeds a noise threshold, extracting a pseudo-range measurement value and solving a three-dimensional space positioning solution with the satellite position coordinates; calculating a path constraint position from the three-dimensional space positioning solution to the optimal path section; and accumulating a reference mileage from a starting point to the optimal path section, calculating an accumulated driving mileage, converting the path constraint position, packaging the path constraint position and the accumulated driving mileage into a monitoring data packet, and reporting the monitoring data packet to a logistics monitoring platform. According to the invention, high-precision logistics position monitoring in a mobile scene is realized, and the monitoring precision and scheduling efficiency of logistics transportation are effectively improved.

This utility model discloses a machining fixture for the main boom of an aerial work platform, comprising: a machine tool worktable and an end positioning and clamping device, a rotary clamping device, and a tail-side pushing and clamping device mounted on the machine tool worktable. The end positioning and clamping device, the rotary clamping device, and the tail-side pushing and clamping device are arranged sequentially at the front, middle, and rear of the machine tool worktable, and the three can automatically and collaboratively clamp the main boom of the aerial work platform. This application achieves automatic positioning and multi-point collaborative clamping of the main boom workpiece, eliminating positioning errors caused by manual operation. The hydraulic drive system ensures synchronous operation of each clamping device, shortening the clamping preparation time. The adaptive adjustment mechanism is compatible with workpieces of different specifications, reducing the number of tooling changes. The composite clamping method disperses contact stress, preventing clamping deformation of thin-walled structural parts. The multi-directional constraint mechanism effectively suppresses machining vibration and improves the positional accuracy of hole machining.

The utility model discloses a multilayer printed circuit board blind hole inspection device belongs to the field of circuit board, a multilayer printed circuit board blind hole inspection device, including equipment base, the top of equipment base is fixed with the U -shaped equipment frame, and the bottom of U -shaped equipment frame inside is provided with industrial camera, and the top of equipment base is provided with the clamping mechanism for circuit board clamping, and the top of equipment base still is provided with the turnover mechanism for clamping mechanism turnover, and the clamping mechanism includes the U -shaped frame, and the one end bolt fixing of U -shaped frame has the fourth drive motor, through the setting of clamping mechanism and turnover mechanism, makes two U -shaped clamping post can hold the circuit board of different size to the blind hole detection of circuit board, makes the circuit board can turn over, realizes the double -sided automatic detection of circuit board, eliminates the positioning error caused by manual turnover, reduces manual intervention, improves detection efficiency.

The application discloses a laser cutting production line for chain manufacturing and relates to the technical field of chain production cutting tools. The production line comprises a positioning table, a first lead screw, a guide rod, a limiting block, a guide roller and a detection assembly, and is provided with a data acquisition unit, a data processing unit and a control execution unit. The detection assembly comprises a supporting table, a second lead screw and a laser sensor and the like structure, can collect material size and position signals, drive a servo motor and a driving motor to act after data processing, drive the displacement of the limiting block and the laser sensor, realize automatic centering positioning of the material and self-adaptive adjustment of the detection position, and simultaneously configure a closed-loop correction unit to correct the position of the limiting block in real time. The application can replace manual adjustment, improve positioning and cutting precision, adapt to processing of materials of multiple specifications, shorten the debugging time, reduce production cost, and improve the automation level and production efficiency of the production line.

This invention provides an environmentally friendly packaging box with a smart viewing window, comprising a box body, a closed viewing window on the side of the box, and the molding material of the box comprising, from the outside in, a barrier coating, a paper layer, and a functional film layer; the opening of the viewing window penetrates only through the barrier coating and the paper layer, and the functional film layer remains intact in the area covered by the opening, directly forming the closed bottom surface of the viewing window; the barrier coating is a water-based environmentally friendly coating, coated or laminated on the outer surface of the paper layer, and the paper layer and the functional film layer are bonded together by an adhesive layer; the functional film layer is a biodegradable film with oxygen and water vapor barrier properties, wherein smart indicator material is uniformly dispersed. While ensuring the functionality of the viewing window, this invention simultaneously improves the environmental performance, intelligence level, barrier performance, and production efficiency of the packaging.

The invention discloses an oil cylinder barrel machining method and a numerical control boring machine, the numerical control boring machine comprises a machine tool, a headstock, a guide rail and an oil receiver, and further comprises an outer circle cutting device arranged between the headstock and the oil receiver, and the outer circle cutting device comprises a first moving mechanism, a second moving mechanism and a tool apron; the first moving mechanism is used for driving the second moving mechanism and the tool apron to reciprocate on the guide rail; the second moving mechanism is used for driving the tool apron to reciprocate in the direction perpendicular to the guide rail. The tool apron is used for installing a turning tool for machining the outer circle frame position. It can be seen that the outer circle cutting device is additionally arranged on the numerical control boring machine, one-time clamping synchronous machining of the inner hole of the oil cylinder barrel and the outer circle frame position is achieved, positioning errors and reference conversion errors caused by multiple times of clamping are eliminated, and the coaxiality precision of the inner hole of the oil cylinder barrel and the outer circle frame position is greatly improved; the assembling and using requirements of high-precision hydraulic oil cylinders such as coal mine hydraulic support oil cylinders are met, the machining efficiency is improved, and the overall production period is shortened.

The invention discloses a PCB and three-layer insulated wire integrated planar transformer and a winding implementation device thereof, and relates to the technical field of transformer production equipment.The transformer comprises a machining table, a positioning assembly and a winding assembly are arranged at the top of the machining table, a pressing assembly is arranged on the winding assembly, and the pressing assembly comprises a first connecting rod; and the top of the first connecting rod is fixedly connected with a mounting box. According to the PCB and three-layer insulated wire integrated planar transformer and the winding implementation device thereof, continuous and flexible pressure provided by the pressing spring is transmitted to the pressing block through the pressing rod, real-time and self-adaptive pressing of three layers of insulated wires in the winding process is achieved, and the winding implementation efficiency is improved. The dynamic pressing mechanism can ensure that each turn of wire rod is tightly and flatly attached to the surface of the PCB, and the wire rods are effectively prevented from loosening or bouncing off, so that the overall flatness and the structural stability of the winding are remarkably improved, and meanwhile, a solid foundation is laid for achieving the ultrathin design of the transformer.

This invention discloses a flexible material conveying and packaging device and its control method, including an input conveyor belt, a clamping platform, a blocking mechanism, a guiding clamping mechanism, a sorting platform, a transfer platform, a transfer mechanism, and an output mechanism. The blocking mechanism guides the material to the clamping platform; a vision detection unit identifies the orientation of the material's long side; the guiding clamping mechanism, driven by a first multi-axis robot, rotates to be parallel to the long side of the material, receives a single row of material, and transfers it to the sorting platform, repeating this operation to accumulate and form an initial aligned array of materials; the sorting clamps push and straighten the material to form a regular array; the regular array is moved to the transfer platform and precisely positioned by positioning clamps; the transfer mechanism, driven by a second multi-axis robot, loads the regular array into a box. This invention achieves high precision, high flexibility, and a compact layout for material sorting and boxing through two-stage sorting and multi-axis robot handling.

This invention discloses a multi-station three-dimensional shaft pulling device and its usage method for a high-speed film production line. The shaft pulling device includes a shaft pulling mechanism, a transverse movement mechanism, and an upper shaft mechanism connected sequentially along the conveying direction of the air-expanding shaft. The shaft pulling mechanism has a shaft pulling station, and the upper shaft mechanism has an upper shaft station. The shaft pulling mechanism and the upper shaft mechanism are respectively located on opposite sides of the transverse movement mechanism. In the transverse movement mechanism, the first transverse movement movable frame moves horizontally relative to the transverse movement fixed frame, and its extreme positions are the shaft pulling station and the upper shaft station. The second transverse movement movable frame moves horizontally relative to the first transverse movement movable frame, and its extreme positions are the opposite sides of the first transverse movement movable frame. The usage method is to place the multi-station three-dimensional shaft pulling device near the winding mechanism of the high-speed film production line. The air-expanding shaft is pulled out by the shaft pulling mechanism. The first and second transverse movement movable frames in the transverse movement mechanism move horizontally. After receiving the air-expanding shaft at the shaft pulling station, it is sent to the upper shaft station.

The utility model discloses a kind of battery and bluetooth device, wherein battery includes shell, electric core and insulation structure.The shell has accommodating cavity and the mounting hole being communicated with accommodating cavity;Electric core includes electric core main body and first tab, and electric core main body includes the first pole piece and the second pole piece woundly arranged, first tab is connected to first pole piece and extends to the outside of accommodating cavity via mounting hole along first direction, and first tab includes connecting portion, and connecting portion is located at the outside of accommodating cavity, for being connected with external circuit;Insulation structure is used to make first tab and shell insulation arrangement.Therefore, when the battery of the present embodiment is installed on bluetooth device, the extension direction of first tab can be directly observed to adjust the angle of external circuit, without the need to refer to the identification outside the shell, thereby eliminating the position error of first tab due to the installation error of electric core and top cover, thereby enhancing the elimination effect of external circuit on current noise.

This invention discloses a visually guided auxiliary positioning device for precise placement of radiotherapy patients. It includes a radiotherapy main unit with a treatment bed on one side. Above the treatment bed are two annular plates forming a semi-circular structure. A visual guidance mechanism is located on one side of each annular plate, and an auxiliary positioning mechanism is located on the other side. The visual guidance mechanism includes a first inner groove formed inside the annular plate, and a top groove communicating with the first inner groove is formed on the outer surface of the annular plate. This invention, by setting up an annular movable visual guidance mechanism and using a motor-driven steel wire rope transmission, combined with an annular slide and pulley guide structure, achieves full-range annular position adjustment of the visual positioning component. With a flip angle fine-tuning structure, it can adapt to the positioning needs of lesions in different parts of the patient's body, such as the head and neck, chest and abdomen, and limbs, from multiple angles without blind spots. This solves the problems of fixed visual positioning range and poor adaptability of traditional equipment, significantly improving the positioning accuracy and flexibility of radiotherapy placement.

The utility model relates to a positioning device used for a wafer measurement driving mechanism, the positioning device is installed at a positioning station of the wafer measurement driving mechanism, the positioning device comprises a center positioning module, a rotation phase positioning module and a code identification module, the center positioning module comprises two clamping arms and a clamping arm driving assembly, the clamping claws located on the two clamping arms abut against the edge of the wafer respectively, the wafer abutting portions, abutting against the edge of the wafer, of the clamping claws are always located on the circumference with the fixed circle center position and the same radius, the circle center position is located on a rotating shaft of a rotary table module of the wafer measurement driving mechanism in the positioning station state, and the wafer center positioning precision is improved. Meanwhile, the rotating phase positioning module and the code identification module which are arranged above the central positioning module are driven by the same radial driving equipment to move to proper radius positions, and are used for detecting and identifying directional nicks and codes at the edge of the wafer respectively, so that the number of times that the wafer needs to be transferred between different stations is reduced, and the working efficiency is improved. The measurement process is simplified, and the measurement time is saved.

The application discloses a bus multi-material resistance welding process and a gradient current-distribution electrode structure and belongs to the technical field of resistance welding.The application integrates an electrode quick-change mechanism in a single welding station, can automatically switch a chromium-zirconium-copper inlaid tungsten-copper electrode and a graphite electrode, respectively completes two types of welding procedures of copper braided wire-copper plate and copper plate-L-shaped copper bent plate, adopts a gradient current-distribution electrode with a waist-shaped through groove on a working surface in a matched mode, realizes uniform distribution of current in a large-area welding area with a size of 21*15 mm or above, simultaneously constructs a full-process automatic production line of "welding-air knife cleaning-CCD visual detection-automatic sorting", and effectively solves problems of uneven welding current of large-area copper workpieces, low electrode change efficiency, easy interference of detection by cooling water and the like, electrode switching time is less than or equal to 5 s, the welding point drawing force is stable, the bus welding full-process unmanned operation can be realized, and production efficiency and product consistency are greatly improved.

This invention discloses an advanced geological prediction seismic source fixture adapted to TBM and a tunnel excavation control method, including a mounting frame and a guide rail assembly, a slide rail platform, and a propulsion drive device installed inside the mounting frame. The mounting frame comprises multiple protective plates connected in sequence to form a shell structure, with TBM connecting components fixedly mounted on the outer side of the protective plates. The guide rail assembly is fixedly mounted inside the mounting frame, and the slide rail platform for fixing the mechanical seismic source is movably mounted on the guide rail assembly. The propulsion drive device is driven to drive the slide rail platform. This invention uses a slide rail platform to support the mechanical seismic source, utilizes the movement of the mechanical seismic source on the guide rail assembly to drive the mechanical seismic source to translate, and coordinates with the propulsion drive device to directly drive the slide rail platform carrying the mechanical seismic source to translate. This enables adjustment of the seismic source position while improving the load-bearing stability of the mechanical seismic source, ensuring stable contact between the mechanical seismic source and the tunnel wall, and improving the reliability of advanced geological prediction data.

The application relates to a bridge crane anti-swing control method and system, which comprises the following steps: constructing a bridge crane system dynamics model containing the friction of a trolley, a bridge and a lifting rope based on the physical parameters of the trolley, the bridge, the lifting hook and the load, and setting a control target; obtaining an energy function based on the bridge crane system dynamics model, and obtaining an anti-swing controller according to the friction of the trolley, the bridge and the lifting rope, the energy function and the control target; and realizing anti-swing control of the bridge crane according to the driving force of the trolley, the bridge and the lifting rope output by the anti-swing controller.

This invention relates to the field of biomedical imaging and clinical monitoring technology, and discloses a lower limb wearable photoacoustic tomography hemodynamic monitoring device and imaging method, including an adaptive flexible detection front end, a main unit, and a pneumatic servo coupling subsystem. The front end integrates ultrasonic array elements, optical waveguides, and strain sensors. The pneumatic system controls the pressure of the flexible airbag based on hysteresis dead zone logic to maintain coupling stability and prevent frequent start-stop oscillations of the micro-pump. The optical subsystem uses a reference photodiode to acquire a single-pulse energy reference signal; the signal processing subsystem combines strain data and reflection peak time to correct the three-dimensional coordinates of the array elements; it introduces the energy reference signal for normalization to eliminate laser pulse fluctuation errors; it combines local curvature to generate compensation coefficients to correct acoustic beam divergence and decouple the actual blood flow velocity; and it performs sliding window integration processing on risk factors to suppress false alarms. This invention improves the monitoring accuracy and reliability of deep hemodynamic parameters under non-planar detection conditions.

The invention relates to the technical field of steady-state sensitivity testing of inertia switches, in particular to a continuous testing method for all-dimensional steady-state sensitivity of an inertia switch, multi-direction continuous testing is achieved through a locking mechanism, the continuous testing method can be suitable for inertia switches of different models and specifications, only the size and angle positioning of a mounting groove need to be correspondingly adjusted, and the testing efficiency is improved. A universal technical solution is provided for the multi-parameter and multi-direction centrifugal test of similar precise electromechanical elements, and good universality and expansibility are achieved; due to the fact that the product does not need to be disassembled and reinstalled in the whole testing process, positioning errors and repeatability errors caused by multiple times of manual clamping are fundamentally eliminated, testing in all directions is based on the same initial installation state, and comparability of testing data in different directions and high accuracy and high consistency of the whole testing result are guaranteed.

This invention discloses a PCB boss coplanarity grinding device, relating to the field of PCB processing technology. It includes: a mounting frame comprising an arc-shaped cover, with a first support and a second support respectively on the left and right sides of the arc-shaped cover; a power assembly comprising a first motor mounted on the first support and transmission columns rotatably nested at both ends of the arc-shaped cover, the first motor and the transmission columns being connected via gear transmission, and a transmission shaft slidingly passing through the transmission columns; and a grinding assembly located between the two transmission shafts, comprising a main shaft, on which low-copper grinding wheels and high-copper grinding wheels are alternately sleeved. This invention, by alternately sleeved low-copper and high-copper grinding wheels on the main shaft, enables the high and low copper layers to achieve the required coplanarity after a single grinding operation. Furthermore, the grinding assembly and power assembly are quick and easy to assemble and replace.

The embodiment of the invention discloses a multi-organ biological magnetic measurement device and method, and the device comprises a base station which comprises a light-transmitting platform used for fixing a biological sample; the coordinate calibration device is located below the light-transmitting platform, and the coordinate calibration device comprises a positioning piece and a positioning detection module; the signal measuring device is located above the light-transmitting platform and comprises a driving mechanism, a measuring probe driven by the driving mechanism and a position sensing sensor group used for detecting the position of the measuring probe; the control device is in communication connection with the positioning detection module and the signal measurement device, and the control device is used for determining the target measurement position of the measurement probe according to the positioning coordinates output by the positioning detection module; the actual position of the measuring probe is determined according to various sensing data output by the position sensing sensor group; and based on the position error between the actual position and the target measurement position, driving the measurement probe to move to the target measurement position to carry out biomagnetic measurement operation.

The utility model discloses a guide rail with an inclined plane connection structure, which comprises a plurality of guide rail units and a sliding block, the plurality of guide rail units are connected in sequence, the inclined plane connection structure is arranged on the guide rail units, and the inclined plane connection structure comprises a first inclined plane part and a second inclined plane part. The first inclined plane parts incline from the upper walls of the slideways on the guide rail units to the end faces, facing the adjacent guide rail units, of the slideways, the second inclined plane parts incline from the lower walls of the slideways to the end faces, facing the adjacent guide rail units, of the slideways, and the inclined plane connection structures at the joints of every two adjacent guide rail units are symmetrical. The first inclined plane part and the second inclined plane part jointly form a smooth transition channel, the balls continuously roll along the inclined plane when passing through, progressive contact surface conversion is formed, the balls are tightly attached to the inner wall of the inclined plane all the time, and vibration caused by gaps or dislocation is avoided; under the combined action of the first inclined surface part and the second inclined surface part, the supporting force borne by the sliding block at the connection part is more uniform, and the sliding block is prevented from inclining or shaking in the transition process.