62 results about "Roller screw" patented technology

This utility model relates to the field of wood processing and discloses a high-efficiency wood surface treatment roller, including an operating table. A positioning component is provided at the front of the operating table, and a mounting frame is fixedly connected to the top surface of the operating table. Two electric rods are fixedly connected to the upper part of the mounting frame, and a sanding component is provided at the lower part of the mounting frame. An installation opening is provided in the middle of the operating table, and an auxiliary roller is rotatably connected to the center of the installation opening. The positioning component includes a housing, with a control rod rotatably connected through the center of the housing. Sliding blocks are slidably connected to the left and right sides inside the housing, and the control rod and the sliding blocks are threaded together. In this utility model, by setting up the cooperation between components such as the housing, control rod, sliding blocks, mounting frame, support, roller screw, and limiting rod, the device can restrict the wood more stably and prevent tilting, making it more practical.

This invention discloses a precision testing device for planetary roller screw pairs, including a testing platform with symmetrically mounted fixed plates on its top. A servo motor is fixedly mounted on one side of one of the fixed plates. The device also includes two sets of support rods symmetrically mounted below the two fixed plates, and a positioning assembly positioned between the two fixed plates. The positioning assembly includes two movable frames and limiting components symmetrically positioned on both sides of the two movable frames. This allows for easy switching between different sized positioning plates when dealing with different types of planetary roller screw pairs, facilitating reliable positioning of the nut or screw according to the type of planetary roller screw pair. Furthermore, after switching, when positioning a reverse planetary roller screw pair, multi-point positioning of the screw in the pair can be quickly achieved, facilitating the movement of the screw in the reverse planetary roller screw pair while preventing rotation during screw movement, thus improving testing accuracy.

A double-helix planetary roller helical pressing device includes a first turntable 10 and a second turntable 20. A conical roller 30 is provided between the first turntable 10 and the second turntable 20. The first turntable has a first conical helical track 11, and the second turntable has a second conical helical track 21. The conical roller has a roller annular groove 31 that meshes with the first conical helical track 11 and the second conical helical track 21. The first turntable 10 and the second turntable 20 rotate coaxially relative to each other, and the conical roller 30 rolls on the first conical helical track 11 and the second conical helical track 21. This invention uses a first turntable with a first conical helical track and a second turntable with a second conical helical track. The conical roller is provided with annular teeth, which allows the conical roller to accurately maintain its radial position, uniformly bear the pressing load, and also avoids slippage between the conical roller and the first and second turntables, improving the operating effect. A roller retainer structure with a roller carriage is used, which can better constrain the posture of the roller during movement.

This invention discloses a planetary roller screw assembly fixture and method, including a roller axial positioning fixture, a roller circumferential positioning fixture, a lower cage, and an upper cage. During the manufacturing process of the nut and rollers, the correct meshing points are marked. The rollers and nuts are assembled according to the marked positions to determine the circumferential angle of the rollers. The axial position of the rollers is determined by the roller axial positioning fixture, thus roughly determining the spatial position of the rollers. After assembling the first roller, it is rotated to make way for the marked position on the nut, allowing the assembly of the second roller to continue at the marked position until all rollers are assembled. This method solves the problem of random assembly of rollers, improving assembly efficiency and consistency. The roller circumferential positioning fixture, used in conjunction with the lower and upper cages, prevents the rollers from tilting towards the center during rotation and allows for individual position adjustment of one roller.

A BOP pipe connection system includes: a shaft formed in a circular trajectory in a plurality and rotated by an external force, and having a shaft screw thread formed on an outer circumferential surface; roller screws provided in a plurality on the outer circumferential surface of the shaft, and having roller screw threads formed on each outer circumferential surface so as to be gear-engaged with the shaft screw thread; a nut provided in contact with different roller screws, having nut screw threads along an inner surface so as to be gear-engaged with the roller screw threads, and moving up and down as the shaft rotates; and a moving part having a hollow cylindrical shape, connected to the nut, and moving up and down while pressing and fixing an outer circumferential surface of a pipe.

The application relates to a low-friction design method of a planetary roller screw, and belongs to the technical field of mechanical design. Step 1, a contact point position solving model and a kinematics model of the planetary roller screw are established, and the sliding speed and the entrainment speed of a screw-roller and a roller-nut contact pair at a contact point are solved; step 2, according to the definition of a slide-roller ratio, a slide-roller ratio calculation model of the screw-roller and the roller-nut contact pair of the planetary roller screw is established; step 3, according to the correct movement and meshing requirements of the planetary roller screw, a structure constraint condition is established; step 4, taking the minimization of the slide-roller ratio of the screw-roller and the roller-nut contact pair as an optimization target, and combining the structure constraint condition, a low-friction design model of the planetary roller screw is established; step 5, a multi-objective evolutionary algorithm is adopted to calculate the low-friction design model of the planetary roller screw, and optimal solutions and corresponding structure design parameters are obtained.

This invention relates to the field of robot joint drive technology, and discloses a standard planetary roller screw linear electric drive joint, including a housing assembly, a standard planetary roller screw assembly, a motor assembly, and an anti-rotation component. This invention employs a configuration where the screw nut rotates to drive the linear output of the screw. The motor rotor magnet is directly fixed to the outer circumferential surface of the motor rotor support base, making the screw nut also function as the motor rotor. The motor stator is fixed within the housing through a potting process. An anti-rotation component is connected to the end of the screw shaft to restrict circumferential rotation. This invention achieves deep integration of the motor and transmission components. While ensuring high power density, it leverages the processing advantages of the standard planetary roller screw to significantly reduce manufacturing difficulty and cost, and improves the overall positioning accuracy and thermal management performance of the joint.

This invention discloses an integrated servo electric cylinder with a reverse planetary roller screw, comprising a housing, a motor stator disposed inside the housing, a magnetic ring disposed inside the motor stator, a screw nut disposed inside the magnetic ring, a reverse planetary roller screw disposed inside the screw nut, a front end cover disposed on one side of the housing, a rear end cover disposed on the other side of the housing, an encoder magnet holder disposed inside the housing and located on one side of the screw nut, an encoder magnet disposed on the encoder magnet holder, an encoder disposed on one side of the encoder magnet, a gland disposed on the rear end cover, and an anti-rotation joint bearing disposed on one side of the reverse planetary roller screw. The advantages are: compact structure, space saving; convenient installation, plug-and-play; intelligent control, simple debugging; high precision and high response.

The utility model relates to high accuracy transmission technical field, specifically disclose a kind of end face composite cam and cyclic planetary roller screw pair. Wherein, the end face of cam body of end face composite cam is provided with axial reset convex part, and the axial end face of axial reset convex part constitutes axial reset guide surface;The radial bottom of axial reset convex part is integrally provided with radial lifting convex part, and the height of radial lifting convex part protruding on cam body end face is higher than the protruding height of axial reset convex part, and the radial outer surface of radial lifting convex part forms radial lifting surface. The above structure is integrated on end face composite cam by radial lifting convex part and axial reset convex part, so that the radial lifting function and axial reset function of roller are integrated on single end face composite cam, change the complex structure that needs to rely on multiple independent components to realize radial lifting and axial reset in traditional scheme, significantly reduce the number of parts, reduce assembly difficulty and manufacturing cost.

This invention relates to the field of precision machinery technology, and more particularly to a high-rigidity parallel adjustment platform with variable configuration, comprising: a lower platform, an upper platform, N legs, N first sliding components, and N second sliding components. The N legs are arranged at intervals between the upper and lower platforms, and each leg is telescopically connected via a planetary roller screw assembly. Each first sliding component includes a first moving part and a first fixed part, with the first fixed part disposed on the lower platform and the first moving part movable relative to the first fixed part. Each second sliding component includes a second moving part and a second fixed part, with the second fixed part disposed on the upper platform and the second moving part movable relative to the second fixed part. The first end of each leg is connected to the corresponding first moving part via a corresponding first offset hinge, and the second end of each leg is connected to the corresponding second moving part via a corresponding second offset hinge. This invention at least improves the adaptability of the parallel adjustment platform to different usage scenarios.

The present invention discloses an anchor rod construction device and method for large-scale geomechanical physical simulation tests. It consists of a fixed guiding system, a rotary propulsion system, a telescopic clamping system, and a power control system. The fixed guiding system includes a U-shaped frame and a sliding rod, which are used to fix the drilling device and provide a sliding platform for the telescopic clamping system; the rotary propulsion system includes a roller screw and a servo motor, which can achieve the steady drilling of a slender anchor rod during the rotation process; the telescopic clamping system includes a telescopic rod, a chuck, a rotating cone, and a clamping frame, which are used to clamp the slender anchor rod for rotation and drilling. The power control system includes a console, an air pump, and a servo motor, which provide a power source for the slender anchor rod. The present invention can achieve the drilling of slender anchor rods in any orientation such as the side wall and vault of a tunnel in a model test, and can truly restore the anchoring and support process of an actual tunnel project, providing technical support for carrying out large-scale physical simulation tests to deeply study the stability of the anchoring and support of underground projects.

This invention relates to a multi-performance coordinated design method for planetary roller screws, belonging to the field of planetary roller screw technology. It includes the following steps: Step 1, establishing a calculation model for the thread engagement point slip ratio and maximum von Mises stress based on the kinematics and load distribution model of the planetary roller screw; Step 2, establishing equal and unequal structural constraints based on the correct meshing, non-interference, and contact boundary conditions of the planetary roller screw; Step 3, establishing a multi-performance optimization design model for the planetary roller screw based on the optimization objective and constraints; Step 4, using a multi-objective genetic algorithm to solve the multi-performance design model of the planetary roller screw, obtaining the Pareto front and corresponding structural design parameters; Step 5, obtaining the Pareto front range that satisfies the given limit trade-off cost. Based on the Euclidean norm and minimizing the dimensionless distance, the optimal trade-off solution and corresponding structural design parameters are obtained.

This invention relates to a toothless planetary roller screw pair, comprising a planetary nut, a planetary screw, and a plurality of planetary rollers disposed between the planetary nut and the planetary screw. Each planetary roller has a threaded portion in its center that mates with the planetary screw and the planetary nut. Each planetary roller has several annular grooves distributed axially at both ends. Each planetary nut has several annular grooves at both ends that mate with the annular grooves of the planetary rollers. The annular grooves and annular grooves can slide relative to each other. This invention uses annular grooves and annular grooves at both ends to form a sliding raceway contact pair, replacing the traditional gear-internal gear ring mating structure. The contact between the annular grooves and annular grooves ensures complete contact across the entire raceway, resulting in strong load-bearing capacity and significantly improving the rollers' resistance to eccentric loading and skewing. Furthermore, the mating clearance between the annular grooves and annular grooves can be machined and controlled according to actual working conditions, resulting in higher constraint and limiting accuracy, stronger stability and impact resistance, and significantly reduced machining and assembly difficulty.

This application pertains to a planetary roller screw actuated vehicle compartment sliding system, comprising: sliding compartment, planetary roller screw motion assembly, drive unit, support frame, load-bearing box. The planetary roller screw motion assembly, drive unit, and part of the support frame are symmetrically integrated within the load-bearing box. The load-bearing boxes are symmetrically set at the lower part of both sides of the sliding compartment. Installation only requires fixing the base plate of the support frame to the vehicle body, thereby securing the entire sliding compartment at the vehicle's opening. The bottom of each load-bearing box features a long slot, allowing the two symmetrical load-bearing boxes to slide back and forth synchronously. This application enables the extension and retraction of the vehicle compartment, increasing the usable space within the vehicle. This design ensures a neat and aesthetically pleasing appearance while facilitating easy installation and removal.

The present invention relates to a push rod (8) for a roller screw drive (1) with a damping system (14) and roller screw drives (1) with a damping system (14). The push rod (8) comprises: i) a first rod section (10) for attachment to an axially translating component (4) of the roller screw drive (1); ii) a second rod section (12) for attachment to a load to be moved; and iii) a damping system (14). The damping system (14) is formed by a piston element (16) arranged at a first end (12a) of the second rod section (12) and a cavity (18) filled with a damping fluid at a first end (10a) of the first rod section (10). The piston element (16) is arranged in the cavity (18) and is axially movable.

This invention discloses an amorphous alloy, planetary rollers made from the amorphous alloy, and a planetary roller screw including the plurality of planetary rollers. The amorphous alloy material is a Zr-based amorphous alloy, and the atomic percentage composition of the Zr-based amorphous alloy is selected from one of the following: Zr₅₁Ni₂₀Al₁₅Cu₁₀Nb₄, Zr₄₆.₇Ni₉Al₁₂.₃Cu₂₈Nb₄, Zr₅₁Cu₂₅Al₁₂Ni₁₀Ti₂, Zr₅₆Cu₂₅Al₁₂Ni₅Ti₂. The Zr-based amorphous alloy proposed in this invention has high strength, high hardness, low friction and high wear resistance. Planetary rollers and planetary roller screws including multiple planetary rollers prepared based on this amorphous alloy have high transmission efficiency, high rated dynamic load, low backlash and excellent transmission and repeatability positioning accuracy.

The application discloses a batch manufacturing method of a double-toothed nut for a planetary roller screw, and relates to the technical field of planetary roller screws, which comprises the following steps: machining a workpiece from a forged blank and performing spheroidizing annealing treatment; performing quenching and tempering treatment after rough machining of the workpiece, and then performing high-frequency quenching treatment after semi-finishing machining; manufacturing a gear shaping fixture and machining a flange positioning disc on the outer circumference of the workpiece to assemble a tooth position reference; machining a first inner gear ring and a second inner gear ring which are symmetrically arranged, and controlling the azimuth angle difference P of the central axes of the first inner gear ring and the second inner gear ring to be within the range of-0.015mm to +0.015mm in terms of the arc length L at a tooth division circle; machining an inner thread part in the workpiece in the axial direction; and machining the flange positioning disc to be removed to form the double-toothed nut. The application increases the process structure, designs the gear shaping fixture and changes the heat treatment method, thereby completing integrated manufacturing of the inner gear ring and the inner thread part, and improving the overall strength and assembly precision.

The application discloses a kind of calculation methods of friction torque of planetary roller screw pair, comprising: establishing roller thread load distribution model;Solving the contact characteristic index of planetary roller screw pair;Calculate the elastic hysteresis friction torque caused by elastic deformation hysteresis before and after rigid body loading and unloading;Calculate the spin slip friction torque caused by the fact that the actual rotation axis of roller is not perpendicular to the common normal of contact surface;Calculate the differential slip friction caused by the relative sliding between screw, roller and nut;Calculate the lubricant viscous friction torque caused by the surface viscous force of lubricant;Iterate the above friction torque to obtain the friction torque of the whole planetary roller screw pair.The thread load distribution law and contact characteristics of the planetary roller screw pair can effectively and accurately derive each part friction torque, which can effectively improve the transmission efficiency of the planetary roller screw pair, and has guiding significance for the parameter design of the planetary roller screw pair.

This invention discloses a method for optimizing load distribution in planetary roller screws based on multi-source error matching. It relates to the field of model correction technology. The method includes the following steps: S1, based on a preset multi-roller load distribution theoretical model, a complete dataset of multi-roller load distribution coefficients is obtained through simulation calculations and data acquisition; S2, using this dataset as samples, a neural network surrogate model is constructed to establish a precise mapping relationship between multi-source errors and multi-roller load distribution coefficients. This invention can accurately and efficiently determine the optimal solution for load distribution uniformity and the corresponding optimal matching scheme for multi-source errors. It utilizes a neural network to establish a complex nonlinear mapping relationship from multi-source errors to load distribution, replacing time-consuming high-precision physical simulation. Simultaneously, it employs a two-level collaborative optimization strategy: first optimizing load distribution among the rollers, and then optimizing load distribution on each thread tooth of the roller screw and nut, solving the problem of uneven load distribution between multi-roller and threaded pairs in engineering.

The present invention relates to a BOP pipe connection system comprising: a plurality of shafts formed along a circular trajectory and configured to rotate by an external force, each shaft having a shaft screw thread formed on the outer circumferential surface thereof; a plurality of roller screws respectively disposed on the outer circumferential surfaces of the shafts and each having a roller screw thread formed on the outer circumferential surface thereof so as to be gear-coupled with the shaft screw thread; a nut provided in external contact with the different roller screws and having a nut screw thread along the inner surface thereof so as to be gear-coupled with the roller screw thread, the nut being moved upward and downward as the shafts rotate; and a moving part having a hollow cylindrical shape and connected to the nut, the moving part being configured to move upward and downward while pressing and fixing the outer circumferential surface of a pipe.

The present application relates to the technical field of roller screw assembly, in particular to an automatic assembly tool for roller screw, comprising a base and two assembly seats symmetrically arranged on the base, each assembly seat movably arranged with an assembly frame and a linkage mechanism drivingly connected with the assembly frame, the assembly frame being capable of switching between a loading state and an assembly state under the drive of the linkage mechanism, the present application symmetrically arranging the assembly seats capable of moving towards or away from each other on the base, and configuring the assembly frame capable of switching postures on each assembly seat, so that the loading station and the assembly station of the roller are completed in the same mechanism, avoiding the disturbance of the roller caused by the axial separation or overall disassembly of the positioning tool in the prior art, effectively improving the stability and reliability of the assembly process.

This application relates to the field of electric cylinders, and more particularly to a hollow dual-output-shaft servo planetary roller screw electric cylinder, comprising a housing, a planetary screw, a screw nut, and an encoder. A servo motor stator is housed within the housing. The screw nut is rotatably connected to the housing, and a permanent magnet is fixed to the outer peripheral wall of the screw nut to serve as the servo motor rotor. The screw nut has a through-channel at its center, and the planetary screw is threaded into the channel. Output shafts are fixedly connected to both ends of the planetary screw, and the two output shafts exit from both ends of the housing via the channel. The encoder is a hollow annular structure, fitted onto the screw nut and coaxially arranged with it. The encoder is either a capacitive encoder or a photoelectric encoder. Compared to Hall effect magnetic sensing, capacitive or photoelectric encoders offer higher detection accuracy, faster response, and stronger interference resistance.

This application provides a planetary roller screw transmission system, including a sun rod, a nut, and multiple circumferentially distributed planetary rollers disposed between the two. The screw stator is provided with a main load-bearing multi-start thread and a synchronous constraint multi-start thread in a local section. The planetary rollers are correspondingly provided with a main load-bearing thread section with the same pitch as the main load-bearing multi-start thread and a phase constraint thread section with the same pitch as the synchronous constraint multi-start thread. The main load-bearing thread pair and the phase constraint thread pair satisfy a fixed thread start ratio relationship to establish the circumferential phase constraint and the revolution-rotation ratio of the planetary rollers, thereby limiting their axial displacement relative to the screw stator. Through the synergistic effect of the main load-bearing thread pair and the phase constraint thread pair, this system achieves circumferential phase synchronization and axial displacement restriction of the planetary rollers, reduces the need for additional synchronization structures, and is beneficial for reducing noise and vibration, simplifying the structure, and improving the effective load-bearing capacity.

The utility model discloses a novel robot is with planetary roller screw relates roller screw technical field, it is characterized by, including: main screw; Screw nut, fixedly connected symmetrical gear ring, a group of roller screws are set between main screw with screw nut, realize drive, and the both ends of each roller screw are fixedly connected gear respectively, and each gear is engaged corresponding screw nut respectively, symmetrical guide plate is provided with installation groove respectively to a group of roller screws, and each roller screw is installed on the guide plate. The utility model discloses a novel robot is with planetary roller screw, through adopting carbon fiber composite material roller screw and carrying out nanometer hard alloy coating on the surface of main screw, to improve the service life of equipment, at the same time, realize the sealing of screw nut part.

This invention provides a laminating machine for busbar wideband processing, belonging to the technical field of busbar wideband processing equipment. It includes a feeding mechanism, a laminating mechanism mounted on the right side of the feeding mechanism, and a receiving mechanism mounted on the right side of the laminating mechanism. The laminating mechanism includes a lower support, an upper support mounted on one side of the lower support, a rotating shaft and a support 1 screwed together via connector 4, a support 2 screwed together with the end of the lower laminating roller via connector 5, the end of the upper laminating roller screwed together with the corresponding slide via connector 6, and a guide roller 1 screwed together with the end of the support 2 via connector 7. A guide wheel is mounted on the guide roller 1. This invention solves the problem in existing busbar wideband processing laminating machines where the copper strip and film may shift during lamination, making it impossible to ensure accurate film lamination onto the copper strip, thus reducing product yield and processing efficiency.