6463 results about "Ball screw" patented technology

The invention discloses a Bayesian learning and piezoelectric ceramic driving numerical control machine tool thermal error compensation system and method. According to the system, a distributed temperature sensor array is arranged in heat sensitive areas such as a machine tool spindle, a ball screw, a guide rail and a bearing seat, whole-field temperature information is collected in combination with a thermal infrared imager, and multi-source thermal field sensing is achieved; meanwhile, a laser interferometer and a capacitive displacement sensor are used for constructing a dynamic pose monitoring network. The intelligent decision-making unit integrates a Bayesian online learning engine, fuses a physical model and a data driving model, dynamically predicts a thermal error and generates a compensation instruction. And the piezoelectric execution mechanism carries out nonlinear pre-compensation on a driving signal through a three-section Prantl-Ishlinskii hysteresis inverse model according to the instruction, so that high-precision pose adjustment is realized. The thermal error compensation precision is remarkably improved, the adaptability of the system to complex working conditions is enhanced, the service life of equipment is prolonged, and the method is suitable for various numerical control machine tools.

The invention is suitable for the technical field of reliability test of numerical control machine tools, and provides a ball screw pair comprehensive performance test device and method for simulating real working conditions. The device comprises a ball screw pair, a test device base, a rolling guide rail pair, a grating ruler integrated installation unit, two sets of support driving units, a loading workbench, an axial force simulation loading unit, a tested workbench and a comprehensive performance detection unit. The two sets of supporting and driving units are distributed on the test device base in a staggered alignment manner and are respectively connected with the loading workbench and the tested workbench, and synchronous driving of the loading workbench and the tested workbench is realized through synchronous control; and the axial force simulation loading unit realizes static and dynamic simulation loading of the axial force through electro-hydraulic servo control. According to the invention, a test device and technical support are provided for carrying out the reliable comprehensive performance bench test of the ball screw pair, and the problems of the ball screw pair in the aspects of high-frequency dynamic load simulation loading, comprehensive performance test and motion tracking loading are solved.

According to the ball mounting device for the ball screw pair of the steering gear, the angle of the nut base is adjusted through the nut rotation driving structure in the steel ball mounting process, and then injection of steel ball channels with inlets of different angles is guaranteed; the ball injection structure achieves lifting motion based on the ball loading lifting driving structure, and it is ensured that steel ball channels with different heights are injected. And automatic discharging of the steel balls is achieved through cooperation of the discharging structure and the ball injection structure, and the installation efficiency is effectively improved.

The invention discloses a continuous stirring friction additive manufacturing device capable of alternately pushing bars and a using method, the continuous stirring friction additive manufacturing device comprises a frame, two clamping feeding mechanisms, four ball screws and a tool head, three baffles are fixedly installed on the frame, the three baffles are parallel to one another and are arranged in the vertical direction, and the tool head is fixedly installed on the frame; a clamping and feeding mechanism is arranged between every two adjacent baffles; screws of the four ball screws are arranged in the vertical direction and penetrate through the two clamping and feeding mechanisms and the three baffles, and a bar penetrates through the two clamping and feeding mechanisms and the three baffles in the vertical direction. And a clamping jaw is mounted on the clamping and feeding mechanism. According to the continuous friction stir additive manufacturing device, in the friction stir additive manufacturing process, continuous and continuous feeding of bars is completed through alternate clamping and pushing of the two clamping and feeding mechanisms, and continuity, uniformity and stability of the friction stir additive manufacturing process are achieved.

According to the humanoid robot linear joint and the humanoid robot, an output end knuckle bearing seat and a fixed end knuckle bearing seat are integrally integrated on a push rod and a force sensor correspondingly, the integration degree is high, the structure is compact, and therefore the axial size of the linear joint can be effectively shortened. A motor assembly is arranged in a joint shell, an encoder assembly is connected with the motor assembly, the motor assembly is connected with a ball screw pair, the ball screw pair is connected with a push rod assembly, a front end cover is arranged on one side of the joint shell, a rear end cover is arranged on the other side of the joint shell, and the push rod assembly is arranged in the front end cover. An output end joint bearing seat is integrally integrated on the push rod assembly, the output end joint bearing seat is arranged outside the front end cover, the force sensor is arranged on one side of the rear end cover, a fixed end joint bearing seat is integrally integrated on the force sensor, and the fixed end joint bearing seat is arranged outside the force sensor.

According to the pull-up type photocuring 3D printer, an outer ring of a slewing bearing is fixed to a workbench, a lifting pipe is engaged with the inner side of an inner ring in a threaded mode, and the lifting pipe can only move in a reciprocating mode in the vertical direction; the sleeve is fixed on the outer ring, the trough is meshed on the outer ring in a threaded manner, and the guide rod on the inner ring is arranged in a guide hole of the trough in a sliding and penetrating manner; when the inner ring rotates, the material groove reciprocates between the first working position and the second working position, and the lifting pipe reciprocates between the third working position and the fourth working position. When the material groove is located at the first working position and the lifting pipe is located at the third working position, printing work can be conducted; and when the material groove is located at the third working position and the lifting pipe is located at the fourth working position, the release film and the product model on the printing platform are in a separated state. The invention further discloses a photocuring 3D printing method. The vertical moving distance and speed of the printing platform are reduced through descending of the material groove, abrasion of the ball screw and the screw nut is reduced, and the service life of equipment is prolonged.

The invention belongs to the technical field of permanent magnet assembly, and discloses a sector ring type permanent magnet assembly tool and a driving force prediction method thereof. The tool utilizes an ingenious mechanical structure to limit the freedom degrees of the permanent magnets in all directions, adopts a ball screw transmission scheme and a servo driving mode to control the assembling precision of the permanent magnets, can meet the assembling requirements of the permanent magnets of the inner / outer rotor of the permanent magnet coupler, and can be applied to the assembling field of the permanent magnets with different sizes and shapes by replacing the clamping plates A / B; the method has the advantages of high precision, high efficiency, strong universality, good environment compatibility and the like; meanwhile, according to the driving force prediction method provided by the invention, a permanent magnet equivalent magnetization current analysis model is taken as a theoretical basis, and the magnetic attraction acting force between the permanent magnet to be assembled and the inner / outer rotor hub is determined by solving the space magnetic induction intensity of the permanent magnet to be assembled. The driving force required by assembly is predicted by means of the permanent magnet assembly tool, calculation is easy and convenient, prediction precision is high, and the method is a calculation method with engineering universality and convenience.

The present invention relates to the technical field of measuring magnetic variables, and specifically to a bracket and multi-array control method for adjustable TMR and electromagnetic measurement sensors. The bracket body of the present invention includes a number of fan-shaped bottom plates made of SMC composite materials, and adjacent fan-shaped bottom plates are spliced ​​together to form a complete annular structure; the adjustment mechanism includes a ball screw and a motor, and the ball screw is installed on the track of the bracket body; the electromagnetic measurement sensor includes a carrier and an electromagnetic measurement unit installed on the carrier; the bracket body and the electromagnetic measurement sensor adopt an upper and lower layered layout, and the probe electromagnetic measurement sensor is independently adjusted by the adjustment mechanism, and arranged in an array along the track, thereby forming an adjustable array sensor together. By improving the adjustable bracket structure, the electromagnetic measurement sensor can be flexibly arranged and independently adjusted in an array on the bracket, so as to more accurately detect magnetic field signals at different positions and directions, and improve the efficiency and accuracy of magnetic field detection.

The ball screw pair comprises a lead screw (1) and a nut (2) which are matched with each other, and the length of a threaded roller path of the lead screw (1) is smaller than that of a threaded roller path of the nut (2); a plurality of balls (3) are arranged in a threaded roller path where the lead screw (1) is matched with the nut (2); returning device mounting grooves (11) are formed in the two end faces of the lead screw (1). The lead screw (1) is provided with a ball return hole channel (12) communicated with the reverser installation grooves (11) in the two ends of the lead screw (1). The lead screw is simple in manufacturing process, lower in manufacturing cost, uniform and smooth in ball stress and higher in bearing capacity, and particularly, curved surface remachining of the outer circle and the threaded raceway of the lead screw can be effectively avoided.

A jack assembly that has a base member having a handle assembly extending therefrom, a remote control positioned in the handle assembly, a handle base section of the handle assembly that comprises a battery coupler and a control unit, an electric motor coupled to the base member and providing a torque to a gear assembly, the gear assembly coupled to a ball screw, a carriage slidably coupled to the base member, the carriage having a lift nut coupled thereto, the ball screw threaded through the lift nut such that rotation of the ball screw moves the lift nut, and carriage, linearly along the base member, and a lifting arm pivotally coupled to the carriage on one end and pivotally coupled to a pivot arm at an intermediate location.

The utility model relates to the technical field of rail transit fresh air systems, in particular to an air door actuator of a rail transit fresh air system, which comprises a mounting bottom plate, an air door plate, a support frame, a lifting assembly and a driving assembly, the driving assembly is mounted on the support frame and comprises a rotating shaft, a rotor iron core, magnetic steel and a stator, the rotating shaft is a hollow reducing shaft, and the rotor iron core is arranged on the rotating shaft. The rotor core comprises a large-diameter section and a small-diameter section, the rotor core is mounted at the upper part of the large-diameter section, a circle of cylindrical holes are uniformly formed in the bottom surface of the large-diameter section, magnetic steel and a stator are sequentially arranged outside the rotor core, and a brake is mounted at the upper part of the small-diameter section; the lifting assembly is provided with a ball screw and a lead screw nut, the lead screw nut is installed on the ball screw and fixed to the bottom face of the large-diameter section, the upper portion of the ball screw extends into the hollow portion of the rotating shaft, the lower end of the ball screw is connected with a guide plate, and the guide plate is fixed to the middle of the top of the air door plate. The structure is more compact, the design is more reasonable, the requirement for light weight of rail transit is met, and the waterproof and dustproof requirements can be met.

The invention relates to the technical field of rotary mounting tools, in particular to a rotary mounting tool for a gas tank of a gas-insulated switchgear, which comprises a bottom fixing frame body and a left fixing frame body fixed above the left side of the bottom fixing frame body, a right moving frame body is connected to the upper portion of the right side of the bottom fixing frame body. Ball screws are mounted in the middle parts of the left fixed frame body and the right movable frame body; one side surface of the rotary support plate is connected with a main clamp mechanism for clamping the left side surface and the right side surface of the gas tank of the gas-insulated switchgear; two sets of bottom supporting plates used for supporting the bottom face of the gas tank of the gas-insulated switchgear are symmetrically installed below the rotary carrying plate through self-adjusting frames, and side supporting plates used for clamping the front side face and the rear side face of the gas tank of the gas-insulated switchgear are fixed to the upper portions of the horizontal planes of the bottom supporting plates. According to the rotary mounting tool for the gas tank of the gas-insulated switchgear, clamping force can be applied to multiple side faces of the gas tank of the gas-insulated switchgear, the clamping stability of the gas tank of the gas-insulated switchgear during rotation in the later period can be guaranteed, and the rotary mounting tool can conveniently and well drive the gas tank of the gas-insulated switchgear to rotate.

The invention relates to the technical field of lead screw machining, in particular to a ball screw machining cylindrical surface grinding device which comprises a base and a sliding table fixedly connected to the top of the base, a centering type fixing mechanism is arranged on the sliding table, a sweeping type groove grinding mechanism is arranged on the base, and the sweeping type groove grinding mechanism comprises an annular fixing base. A rotating ring is mounted on the annular fixing seat, and a plurality of arc-shaped polishing blocks combined into a ring shape are mounted on the inner wall of the rotating ring through bolts; according to the ball screw grinding device, self-adaptive centering clamping of ball screws of different sizes is achieved through the centering type fixing mechanism, auxiliary elastic clamping of a grinding area is achieved through the auxiliary cylindrical surface grinding mechanism, the grinding stability is further improved, and the cleaning type groove grinding mechanism is combined, so that the comprehensive grinding effect of the ball screws is achieved, and meanwhile the grinding efficiency of the ball screws is improved. And in addition, auxiliary air cooling treatment can be carried out on the grinding area.

An electric powered steering assembly includes a housing with a cylindrical portion extending in an axial direction, an interior wall of the cylindrical portion defines a groove and extends in the axial direction, and the groove has at least two inwardly tapered walls. A ball screw is disposed in the housing and defines a hole extending in a radial direction. A ball nut disposed in the housing, surrounding the ball screw, is configured to rotate relative to the housing. An anti-rotational pin has a tapered end disposed in the hole, the tapered end having tapered surfaces corresponding to the at least two inwardly tapered walls. A spring is disposed in the hole and biases the anti-rotational pin in a radially outward direction towards the groove so that the tapered end of the anti-rotational pin engages the groove and thereby restricts rotation of the ball screw relative to the housing.

The present invention relates to a rebound composite electromagnetic energy dissipation device for reducing sloshing with a liquid-filled ball for a large liquefied natural gas (LNG) storage tank. When the liquid surface sloshes around, the gas spring is pulled by the steel strand to produce vertical displacement and provide a restoring force, and the vertical displacement of the gas spring drives the fan blades on the sleeves of the ball screws at the bottom to rotate in the damping fluid, consuming energy. The present invention uses hydraulic transmission instead of mechanical transmission of traditional piston motion, and the horizontal pistons produce horizontal displacement in the case of pressure unbalance, thus increasing the flexibility of horizontal piston motion; magnets are arranged in the horizontal slideways and the horizontal pistons to intensify the motion of the horizontal pistons and the relative motion between the horizontal pistons and the interior.

The invention relates to the technical field of automobile part manufacturing, discloses an adjustable multi-angle trimming and deburring device for automobile part machining, and provides a scheme that a trimming machine tool is matched with a multi-angle trimming mechanism to solve the problems that in the prior art, the clearing efficiency of flashes and burrs at a center hole and a heat dissipation groove of a brake disc is low, and positioning is not accurate. According to the device, a four-jaw chuck is driven by a driving motor to rotate a brake disc, a ball screw, a movable block, a connecting rod and other assemblies are utilized, four sets of trimming cutters synchronously trim a center hole, the inner side, the outer side and the bottom face corners of a heat dissipation groove correspondingly, a buffering inserting rod and a spring are combined to absorb impact, and precise operation of the cutters is guaranteed through the design of a deflection rotating shaft, a magnet and the like. According to the scheme, burrs at multiple positions are cleaned at a time, clamping errors are eliminated, energy consumption and cutter abrasion are reduced, the structure is compact, the device is suitable for automatic trimming of brake discs of different sizes, and the machining efficiency and precision are remarkably improved.

The invention discloses a sliding bearing bush surface oil film pressure and thickness measuring device which comprises a chassis, a measurer is fixed to the upper surface of the chassis, supporting frames are fixed to the two sides of the measurer on the chassis respectively, a driving device is fixed between the tops of the two supporting frames, and moving devices are fixed to the opposite sides of the two supporting frames respectively. A loading device is fixed between the two moving devices, one supporting frame is provided with a ball screw, one end of the ball screw is hinged to the driving device, the ball screw is provided with a screw nut, and the screw nut is fixedly connected with the corresponding moving device; one end of the fixing shaft is hinged to the driving device, the fixing shaft penetrates through the loading device, and the other end of the fixing shaft is sleeved with a thrust device fixedly connected with the loading device; the invention further discloses a sliding bearing bush surface oil film pressure and thickness measuring method, the oil film pressure and the oil film thickness can be measured at the same time, the oil film state and an electric signal can be calibrated, and measured data can be fed back in time.

The invention discloses a magnetic lead screw motor linear speed control method based on an improved active-disturbance-rejection controller, and the method comprises the following steps: building a magnetic lead screw motor model, designing an active-disturbance-rejection control law according to the motor model, carrying out the higher-order operation of an extended state observer in a controller, and introducing an acceleration error at a reasonable position of a state equation, thereby achieving the linear speed control of a magnetic lead screw motor. And the improved active disturbance rejection controller is obtained. Compared with the prior art, the improved method provided by the invention has the advantages that the observation capability of the expansion state observer on the disturbance error is improved, so that the anti-interference performance of the control system is improved, and the method has certain universality. Simulation and experiment results show that high-quality operation of the linear driving system of the magnetic lead screw motor can be realized by adopting the improved active-disturbance-rejection control strategy.

The invention discloses a device for detecting the surface flatness of a semiconductor by using laser, and relates to the technical field of semiconductor detection, the device comprises a base, the upper end of the base is fixedly connected with a mounting seat, the upper surface of the base is provided with a through groove, a laser emitter and a fixed seat, the laser emitter is arranged on the mounting seat, and the fixed seat is fixedly connected with the mounting seat. The fixing base is arranged on the upper surface of the base, and a transmission mechanism is arranged in the fixing base. Through the servo motor, the transmission case, the ball screw and the screw nut, the workbench can be driven to move, so that the semiconductor material above moves along the horizontal axis, the position of the laser emitter is driven to be adjusted in cooperation with the contraction of the hydraulic oil cylinder, and finally emitted laser points traverse the surface of the semiconductor. The flatness state of the semiconductor surface is judged according to the position of the laser point received by the target, the influence of machine body vibration on semiconductor flatness detection is avoided, the detection precision is high, and the working efficiency is improved.

The invention relates to the technical field of intelligent control of injection molding machines, in particular to an injection molding machine closed-loop mold adjustment control system and method based on multi-sensor fusion and a self-adaptive algorithm, and the system comprises a sensing layer which adopts a multi-sensor fusion closed-loop feedback architecture and comprises a pressure sensing array, a displacement sensing unit and a temperature sensing array. The data acquisition module is used for synchronously acquiring mold clamping force, position and temperature data of a mold, constructing a three-dimensional error compensation model and realizing dynamic correction of the parallelism of the mold through space force field analysis; the execution layer comprises a servo motor, a belt wheel and a ball screw and is used for adjusting the position of the template; a double-closed-loop control module is arranged in the control layer, the double-closed-loop control module comprises outer ring mold clamping force control and inner ring position control, mold clamping force deviation serves as input of an outer ring, position correction is generated through a self-adaptive PID algorithm, the inner ring converts the position correction into a servo motor rotation angle instruction, and therefore precise control over the mold clamping force is achieved.

A hollow shaft torque motor of the photocuring 3D printer comprises a rotor, a stator and a hollow shaft, and the stator is fixed to a workbench; the lifting pipe is in threaded engagement with the hollow shaft, and the lifting pipe can only reciprocate in the vertical direction; the sleeve is fixed on the stator, the trough is engaged on the sleeve in a threaded manner, and the guide rod on the hollow shaft is slidably arranged in the guide hole of the trough wall in a penetrating manner; when the rotor rotates, the trough reciprocates between the first working position and the second working position, and the lifting pipe reciprocates between the third working position and the fourth working position. When the material groove is located at the first working position and the lifting pipe is located at the third working position, printing is conducted; and when the material groove is located at the third working position and the lifting pipe is located at the fourth working position, the release film is separated from the product model. The invention further discloses a photocuring 3D printing method. The moving distance and speed of the printing platform are reduced through descending of the material groove, abrasion of the ball screw and the lead screw nut is reduced, and the service life of equipment is prolonged.

The utility model provides a welding tool clamp. The welding tool clamp comprises a workbench, a groove is formed in the workbench, ball screws are inserted into the left end and the right end of the interior of the groove, the two sets of ball screws are sleeved with ball screw sleeves, one end of the ball screw is fixedly connected with a first rotating handle, and the other end of the ball screw is fixedly connected with a second rotating handle. The upper portions of the two sets of ball screw sleeves are connected with moving plates through connecting blocks. And the clamping structures are assembled at the upper ends of the two groups of moving plates. Through the arrangement of the ball screw, the ball screw sleeve and the limiting sliding block, the two moving plates can be driven to move inwards or outwards through the first rotating handle, and the stability of the moving plates is improved; and meanwhile, a second rotating handle and a rotating rod are arranged, the clamping structure can be overturned and adjusted, when the welding angle of an object needs to be adjusted, the welding angle can be adjusted through the second rotating handle, the precision of the welding tool clamp is improved, and the welding tool clamp is very practical.

The present invention relates to the field of aluminum cold rolling technology, and specifically to an aluminum cold rolling production device and production method for can body materials, including a stable cold rolling device for rolling aluminum alloy strips, the stable cold rolling device including a driving platform, a cold rolling roller, an outer wall cleaning mechanism, a first ball screw slide, an identification detection device and a spare replacement installation platform; two cold rolling rollers are provided and installed on the driving platform; two outer wall cleaning mechanisms are provided, and an outer wall cleaning mechanism is provided on the side of each cold rolling roller; two first ball screw slides are provided, and a first ball screw slide is installed on the working end of each outer wall cleaning mechanism; two identification detection devices are provided, and an identification detection device is installed on the active end of each first ball screw slide; the spare replacement installation platform is provided on the side of the driving platform, and spare rollers to be replaced are stored on the spare replacement installation platform. The present invention can effectively ensure the stability of production and improve productivity at the same time.

The utility model discloses a fruit tree fertilizing device, which belongs to the technical field of fruit tree fertilizing devices and comprises a cart, and hub components are mounted at two ends of the bottom of the cart respectively. A bracket is mounted at one end of the trolley, and a positive and negative ball screw frame is arranged on the bracket; the two ends of the positive and negative ball screw frame are respectively connected with a fertilizer applying frame through a screw nut pair, and the fertilizer applying frame is semicircular; a plurality of groups of drainage holes are formed in the bottom end of the fertilizing frame at equal intervals. When the two fertilizing frames are close to each other and combined, the whole fertilizing frame is approximately circular, the purpose of fertilizing around the root of a fruit tree is achieved through uniform distribution of the liquid drainage holes, the situation that fertilizer is locally accumulated or intensively applied to a certain area is avoided, and an operator can complete the whole fertilizing operation without adjusting the fertilizing position or direction for many times; and time and labor cost are saved.

The invention discloses a soil-rock mixed filler compaction transparency visual test system and method, and relates to the technical field of civil engineering test equipment. In order to solve the problem that the movement and deformation of soil particles in the soil-rock mixed filler cannot be observed and recorded in the compaction process, the following technical scheme is provided: the device comprises a reaction frame and a model groove formed in the inner side of the reaction frame, an actuator is arranged at the top of the reaction frame, a double-track ball screw transmission mechanism is arranged between the reaction frame and the actuator, and the double-track ball screw transmission mechanism is arranged in the model groove. A pressure sensor is arranged at the bottom of the actuator, and the bottom of the pressure sensor compacts the transparent soil in the model groove through a roller; a laser is arranged at the side end of the model groove and irradiates the transparent soil in the model groove to present a speckle field plane, and an industrial camera is fixed right behind the model groove and collects speckle field pictures generated in the compaction process. According to the invention, visual monitoring and analysis of the compaction process of the soil-rock mixed filler can be comprehensively and accurately realized.

The invention discloses a variable sweepback aircraft variant structure with inner and outer telescopic wings. The variable sweepback aircraft variant structure comprises outer wings, a fuselage, a lead screw system, push rods, inner wings, push rod connecting pieces, graphite copper sleeves and upper and lower guide rails, wing accommodating grooves are formed in the two sides of the fuselage respectively and used for accommodating the outer wings and the inner wings; the inner wing is located in the outer wing and connected with the outer wing through a rotating pair, and rotating motion can be achieved. The inner and outer wings are provided with chutes with special tracks, one end of a push rod is connected with the chutes, the other end of the push rod is fixed with a sliding table of a ball screw through a connecting piece, and a motor drives the screw to rotate to realize symmetrical movement of the push rod, control of actions of the inner and outer wings and wing deformation. Through the design of the sliding grooves of the inner and outer wings, the push rods are connected with the inner and outer wings through the sliding grooves, a certain supporting effect is achieved, the length of the sliding grooves is increased, the change range of the sweepback angle can be increased, the constant-speed movement of the lead screws realizes constant-speed extension of the outer wings and constant-speed rotation of the inner wings through movement of the push rods along the sliding grooves, and the overall structural design is simple and ingenious and flexible and convenient to use.

The invention relates to the field of robot additional shafts, in particular to an additional shaft servo motor type selection method for a robot, which comprises the following specific steps of: S1, determining a transmission system structure at a load end of an additional shaft motor; s2, determining a mechanical structure and motion characteristic parameters of the transmission system; s3, importing into a motor library; s4, performing calculation; s5, judging and checking; s6, model selection is completed; for three mainstream transmission systems of a gear rack, a ball screw and a belt at a load end of a robot additional shaft motor, calculation and accurate model selection are performed on parameters of the motor, and the dynamic response characteristic of the motor and the system compatibility of the model selection method are improved; the model selection tool can support a user to import and modify a motor database by himself / herself, and quickly and conveniently recommend an accurate model selection result from the motor database according to the rotation speed, torque, power and load inertia ratio judgment and check conditions of the motor, thereby improving the model selection efficiency of the servo motor and improving the user experience. And resource redundancy and manufacturing cost caused by a traditional empirical selection method are reduced.

The invention discloses a piston assembly of a motor brake and an assembling process of the piston assembly, and relates to the technical field of motor brakes. Comprising a caliper shell, a caliper body assembly is installed on one side of the caliper shell, a power transmission unit assembly is detachably installed on the caliper body assembly, a positioning pin is arranged on the caliper body assembly, and a positioning hole matched with the positioning pin is formed in the power transmission unit assembly; the caliper body assembly of the caliper comprises a main support, a second support and a third support, wherein the main support is detachably installed on a caliper shell; the sleeve is detachably mounted on the inner side of the main bracket; the nut is connected into the sleeve in a sliding manner; and the ball screw assembly is connected into the nut through a thread. According to the invention, through arrangement of structures such as the caliper body assembly, torque transmission, clamping force transmission and stress support of parts are carried out in a highly integrated manner, installation and signal transmission of a force sensor in a very narrow space are realized, and the performance is reliable.

The invention discloses an adjustable flat plate type ozone generating device and an adjusting method thereof. The adjustable flat plate type ozone generating device comprises an ozone generating assembly, a radial magnetic field adjusting assembly and an axial magnetic field adjusting assembly, the radial magnetic field adjusting assembly comprises a radial rail base and a spiral line base disc, a plurality of radial rails are arranged on the surface of the radial rail base at equal intervals in the circumferential direction, and magnets are arranged in the radial rails in a sliding mode. The axial magnetic field adjusting assembly comprises a base and an axial track, the radial track base is installed on the base, and the base is driven by a ball screw mechanism to move on the axial track in a reciprocating mode. By arranging the radial and axial adjustable magnetic fields, the motion trail and energy distribution of high-energy electrons in the discharge channel are optimized, the activity of ozone generation reaction is effectively enhanced, and the device can maintain high ozone output efficiency for a long time in actual operation due to the establishment of a magnetoelectric cooperative discharge environment; meanwhile, through a mechanical adjustment structure of the electrode spacing and area, discharge parameters can be optimized in real time according to different working condition changes, the fluctuation of ozone yield is remarkably reduced, and the continuity and stability of system operation are ensured.

The utility model provides a pneumatic steering wheel adjusting structure, and belongs to the technical field of automobile design and manufacturing. Comprising a first ball screw fixed on a steering column of a steering wheel; the first piston cylinder is fixedly connected with a nut of the first ball screw; the second ball screw is fixed on a steering column of the steering wheel; the second piston cylinder is fixedly connected with a nut of the second ball screw; the compressor forms a closed loop with the upper and lower layers of the first piston cylinder and the second piston cylinder respectively; the adjusting switch of the pneumatic steering wheel is configured to change the flowing mode of air in the closed loop through conversion between a plurality of configurations. By means of the advantage that the air source can be shared with other system structures, use of electrical equipment is reduced, the cost for adjusting the steering wheel is reduced, the reliability of adjusting the steering wheel is improved, the cost is reduced, the reliability is improved, and meanwhile the overall driving experience is not affected.