115 results about "Pressure angle" patented technology

An optimization method of the tooth profile modification of the cycloid gear is provided, and optimizes the method of equidistant-distance combination modification of the tooth profile of the cycloid gear, with the help of multi-objective optimization algorithm based on pressure angle of tooth profile, curvature radius and contact performance, the working range of the tooth profile modification of the cycloid gear is determined, and the optimal modification amount of the cycloid pin gear planetary reducer is determined, the tooth profile of the cycloid gear is modified to compensate these errors, ensure that it has reasonable tooth side clearance, lubrication and assembly, and improve the transmission efficiency and bearing capacity of the cycloid pin gear planetary reducer. The optimization method has the effects of high precision transmission, low noise operation, improving transmission efficiency, prolonging fatigue life and reducing space occupation.

The invention discloses a one-way bearing, comprising: an outer ring; the inner ring is arranged in the outer ring, and an annular space is defined by the inner ring and the outer ring together; the retainer is arranged in the annular space, a plurality of first containing grooves are formed in the retainer and arranged at intervals in the circumferential direction of the inner ring, wedges capable of swinging are arranged in the first containing grooves and make contact with the inner ring, pressure angles are formed between the wedges and the inner ring, and the number of the pressure angles of the wedges is at least two. According to the one-way bearing, the pressure angle of the wedge block can be changed, the one-way bearing has the advantages of being easy to wedge tightly and bearing larger torque, and the problems of light-load slipping and heavy-load failure of a traditional one-way bearing are effectively solved.

The invention discloses a climbing robot lifting force control method based on finite element simulation, and relates to the technical field of engineering machinery data processing. Comprising the following steps of: establishing a finite element simulation model of the climbing robot to obtain geometrical characteristics including tooth number, pressure angle, tooth root curvature radius, tooth root height and tooth width of an uplink transmission gear and material characteristics including elastic modulus and Poisson's ratio; and simulating gear operation in an on-load state, acquiring torque data to determine a modulus, and calculating tooth root stress. And correcting the tooth root stress in combination with vibration characteristics and surface temperature to obtain an accurate value. The roughness is calculated through the surface height difference, the friction coefficient is corrected by combining the environment humidity and the inclination angle, and the friction force is calculated. And finally, according to the friction force, the accurate tooth root stress and the gravity, a real-time lifting force control coefficient is calculated, the lifting force is dynamically corrected, and accurate control over the lifting force of the climbing robot is achieved.

The invention relates to a gear machining process, in particular to a design method for the output length of a variable-pressure-angle hob, and mainly solves the technical problem that the output length of the hob cannot be accurately controlled in an existing method. The method comprises the following steps that 1, according to the generating machining principle, the circumferential length needed by a variable pressure angle hob for hobbing a complete tooth width of a to-be-machined gear is calculated; (2) based on the circumferential length obtained in the step (1), in combination with the helix angle of the variable-pressure-angle hob and the helix angle of the gear to be machined, the axial length of the variable-pressure-angle hob for hobbing a complete tooth width is obtained through calculation; and (3) according to the axial length obtained through calculation in the step (2), in combination with the axial feed amount during hobbing, the cutter output length of the variable-pressure-angle hobbing cutter during hobbing is obtained through calculation. On the basis of the method, the cutter output length of the variable-pressure-angle hob can be accurately controlled, the risk of machining interference of the variable-pressure-angle hob is fundamentally avoided, and then high-precision machining of the gear is achieved.

The invention discloses a cam curve pressure angle optimization method of a continuous zooming infrared lens. The method comprises the following steps: S1, obtaining cam curve digital coordinate data of a to-be-optimized part; s2, pressure angle distribution characteristics are obtained; s3, selecting an optimization strategy according to the pressure angle distribution characteristics; s4, performing global piecewise function angle redistribution on the cam curve to be optimized; and S5, processing constraint inspection, motion constraint inspection, smoothness constraint inspection and pressure angle constraint inspection are performed according to the constraint conditions, and an optimized result is output after target requirements are met. According to the method, the cam curve can be accurately detected, and various parameters of the curve can be effectively optimized.

The utility model discloses an efficient and high-precision indexable gear hob blade, and relates to a gear machining tool. The problems that a blade has errors in modeling and is low in machining precision are solved. The L side of the indexable hard alloy tooth side blade is processed into an inner concave arc shape, and the R side of the indexable hard alloy tooth side blade is processed into an outer convex arc shape. According to the utility model, the three-dimensional modeling error of the hob is effectively controlled, the pressure angle error of a processed workpiece is improved to more than eight levels, the end face is easy to process, the grinding allowance is small, the cost is low, the processing precision of the hob is improved, the cost performance is very high, and the production cost is low. Not only can new blades be produced, but also the produced and manufactured blades can be transformed and upgraded, and the grinding cost caused by large deviation of gear machining tooth profiles and pressure angles is saved.

The invention discloses a method for increasing the sidewall turn-up height in a building process of an all-steel radial tire, which comprises the following steps of: acquiring multi-source data such as temperature, pressure and angle in a turn-up process through an infrared temperature sensor, a pressure sensor and the like; and constructing a multiple linear regression model, a machine learning model and a hybrid model fused with the physical principle, analyzing the relationship between the process parameters and the anti-package height, and performing verification and optimization. According to model output parameters, a servo motor is used for accurately controlling the downward pressing angle and pressure of a reverse wrapping pressing roller, and production is executed in cooperation with an auxiliary supporting ring and a sectional type reverse wrapping technology; meanwhile, the turn-up height is detected in real time through an intelligent monitoring system, and parameters are automatically adjusted when the turn-up height does not reach the standard. According to the method, precise regulation and control of the tire sidewall turn-up height are achieved, compared with a traditional process, the product percent of pass is increased to 95% or above from 85%, the production efficiency is improved by 20%-30%, the tire structure stability is effectively enhanced, the rolling resistance and the tire burst risk are reduced, and intelligent upgrading of tire manufacturing is promoted.

The invention provides a double-pressure-angle asymmetric tooth profile design and worm grinding wheel tooth grinding method. A tooth profile equation of the asymmetric gear is deduced, the meshing relation between a rack tool and the gear is analyzed in detail, and a precise profile geometric model of the dual-pressure-angle asymmetric gear is further established. In the aspect of worm grinding wheel gear grinding machining, the contour design and finishing method of a worm grinding wheel and application of the worm grinding wheel in asymmetric gear machining are studied, and a worm grinding wheel geometric model and a diamond roller geometric model needed by double-pressure-angle asymmetric gear worm grinding wheel gear grinding are established. The method provides a theoretical basis and an accurate model for design and processing of the asymmetric gear, and is of great significance for improving the efficiency and reliability of a gear transmission system.

The invention provides a design method of a full-life diamond roller for a powerful inner honing wheel. The design method comprises the steps that design parameters of the diamond roller are determined according to parameters of an outer gear and the inner honing wheel; the design parameters of the diamond roller comprise a normal modulus Mn, a circle dividing normal pressure angle Afn, a helix angle Bf2, a tooth number Z2, a displacement coefficient Xn2, an addendum circle diameter Deg2, a root circle diameter Dig2 and an effective starting circle diameter dyx2; and calculating the addendum circle diameter and addendum width of the diamond roller. According to the parameters of the new inner honing wheel and the old inner honing wheel, design parameters of the two sets of diamond rollers are determined respectively, and then the design parameters of the full-life diamond roller are obtained through intersection; the tooth crest width of the diamond roller is checked, it is guaranteed that the tooth crest does not become sharp, parameters of the diamond roller are optimized, the optimality of the honing process is guaranteed, the diamond roller is designed only in 20 minutes at present, and compared with dozens of hours in the prior art, efficiency is greatly improved, and the new product development period is shortened.

The invention discloses a spline meshing characteristic calculation method based on a time-varying meshing position. The spline meshing characteristic calculation method comprises the following steps: establishing a spline meshing state characterization model of a spline; the spline tooth backlash and the pressure angle containing parallel misalignment of the spline are obtained through the spline meshing state characterization model; establishing a spline single-tooth meshing stiffness calculation model through a potential energy method, the spline tooth backlash and the pressure angle; spline tooth meshing deformation coordination conditions are obtained according to the spline single-tooth meshing rigidity calculation model; a spline meshing deformation calculation method of the spline is obtained according to the spline tooth meshing deformation coordination condition; establishing a spline meshing force model containing parallel misalignment according to a spline meshing deformation calculation method; and acquiring spline meshing characteristics of the spline according to the spline meshing force model. According to the method, a spline meshing force model containing parallel misalignment is established; the spline meshing characteristics can be described more accurately, and the design of a high-speed, high-reliability and low-vibration mechanical transmission system is facilitated.

The invention discloses a quick assembly type arch frame and an assembly method thereof. The assembly type arch frame comprises an arch crown component, a stand column component and a lateral connecting rod, a first inner gear is arranged at one end of the arch crown component, and a first outer gear is arranged at the other end of the arch crown component. A second inner gear or a second outer gear is arranged at the upper end of the stand column component; the modulus, the pressure angle, the tooth number and the tooth depth of the first inner gear, the first outer gear, the second inner gear or the second outer gear are the same; the at least two stand column components are vertically installed, and the second inner gears or the second outer gears of the stand column components are internally meshed with the first outer gears or the first inner gears of the arch crown components. The first inner gears and the first outer gears of the adjacent vault components are internally meshed. The stand column components and the arch crown components located on the same section of the cavern form an arch frame, and the adjacent arch frames are connected and fixed through lateral connecting rods. The attaching area of the supporting structure and the surface of the surrounding rock can be increased, and the supporting efficiency and the overall stability are remarkably improved.

The application provides a design and calculation method of main parameters of helical gear flowmeter, and belongs to the technical field of flowmeter. The design and calculation method is obtained by theoretically analyzing the helical gear flowmeter, and the influence of the number of gears, modulus, pressure angle, helix angle, radial clearance of the flowmeter and end face clearance of the flowmeter on the flow pulsation, clearance flow leakage and power loss of the helical gear flowmeter is discussed. In combination with the particle swarm optimization algorithm, two of the three performance indexes, flow pulsation, leakage and power loss, are changed into constraint conditions according to the design requirements, so that the multi-objective problem is changed into a single-objective problem for solving the main parameters of the helical gear flowmeter. Compared with the traditional method of calculating the displacement of the flowmeter through the empirical formula and the empirical coefficient, the application can improve the displacement design precision of the flowmeter, can clearly determine the influence degree of each parameter on the performance of the flowmeter, and can quickly solve the main parameters of the helical gear flowmeter through the optimization algorithm.

A cam optimization design method and an optimized cam for servo cam mechanical equipment relate to the technical field of cam optimization. A cam profile curve segment with a pressure angle greater than an allowable pressure angle is replaced with a replacement cam curve segment with a smaller pressure angle, and a new cam curve is generated by fitting to improve the load-bearing and wear-resistant performance of the cam. After the original cam is worn, it is only necessary to replace the cam curve as needed to produce a replacement curve cam block, and assemble it with the original cam block to obtain an optimized cam, thereby reducing the cost of cam replacement.

The utility model provides a kind of gap elimination gear assembly, gear transmission system and robot, gap elimination gear assembly includes: first gear;Second gear, with first gear coaxial arrangement, can rotate relative to first gear, and can be moved relative to first gear along the axial direction of first gear, the number of teeth of second gear and first gear, modulus and pressure angle are all same;At least one first guide portion, it is set to the end surface of first gear close to second gear along the circumference of first gear;At least one second guide portion, it is set to the end surface of second gear close to first gear along the circumference of second gear;Second gear moves relative to first gear along the axial direction of first gear, and second guide portion and first guide portion are along the circumference of first gear sliding fit, and rotate relative to first gear.The utility model's gap elimination gear assembly can realize no side gap gear transmission, effectively reduce the dead stroke error of gear transmission, still can keep stable gap elimination state in bidirectional transmission.

The utility model discloses a kind of seat pitch adjusting device, including logging truck, the cab of logging truck is equipped with seat, and seat is installed in cab by bottom plate, the lower end of seat is equipped with buffer unit, and the lower end of buffer unit is equipped with top plate, adjusting mechanism is equipped between bottom plate and top plate, for adjusting seat pitch angle;The utility model is equipped with horizontal inclination sensor by setting the adjusting range of adjusting mechanism ±15 °, can read the inclination angle of logging truck, then control motor rotation adjusts and compensates the inclination angle of seat;While using circular arc guide rail slider as main structure, structure gap is small firm stable;Using the adjusting mode of cam groove and cam slider combination, motor and screw rod are used as power to push cam slider, while the cam structure with large pressure angle has self-locking ability, so that the adjusting mechanism has greater carrying capacity, while it can meet the demand of frequent adjustment.

The present disclosure relates to a gearbox housing, comprising an input-side housing, a side housing and an output-side housing, wherein the input-side housing and the output-side housing are connected to the side housing by means of a plurality of bolt holes arranged along the side housing; the input-side housing is provided with first and second bearing seats and a plurality of radial rib plates; the plurality of radial rib plates include first radial rib plates and second radial rib plates; each first radial rib plate extends radially outward from the center of the first bearing seat, and each second radial rib plate extends radially outward from the center of the second bearing seat; the radial rib plates are connected to the bolt holes; the direction connecting the center of the first bearing seat and the center of the second bearing seat is a first direction, and a second direction is perpendicular to the first direction; around the center of the first bearing seat, in the areas deviating ±30° of a pressure angle relative to the second direction, the first radial rib plates and the bolt holes are arranged more densely than in other areas, the pressure angle being the pressure angle of the pressure acting on the first bearing seat. The gearbox housing of the present disclosure can achieve beneficial effects such as inhibiting deformation, improving supporting stiffness and facilitating heat dissipation.

The invention relates to a membrane disc flexible coupling, and relates to the field of couplings. According to the technical scheme, an inner and outer tooth meshing pair with matched modulus and pressure angle is additionally arranged on the membrane disc and the protective plate, so that an efficient emergency torque transmission structure is constructed; when the coupler works normally, meshing interference of inner teeth and outer teeth can be effectively avoided by means of the reserved transmission gap, and it is ensured that the flexible compensation performance of the membrane disc is not affected; once the membrane disc is damaged, the inner teeth and the outer teeth can be quickly meshed to form a temporary torque transmission path. Under the condition, the operation limitation of a traditional coupler is broken through, torque can be continuously transmitted after the diaphragm disc loses efficacy, precious emergency shutdown or maintenance time is won for equipment such as a large compressor and a generator set, production interruption and safety accidents caused by sudden shutdown of the generator set are fundamentally avoided, and the operation reliability of related equipment is remarkably improved.

The application discloses a kind of heavy load AGV wheel edge reduction unit asymmetric high coincidence planetary gear train optimization design method, it is related to artificial intelligence automatic driving field, including: the power, rotational speed and temperature parameter of wheel edge reduction unit operation are collected, dimensionless standardization processing is carried out based on benchmark working condition value, determines the working condition fluctuation interval corresponding to each parameter;Uniform sampling is carried out through the working condition fluctuation interval determined in step one, obtain several groups of working condition sample data, with the minimum gear face contact stress and root bending stress as optimization goal, solve the gear optimal design parameter corresponding to each group of working condition sample data;The application establishes the quantitative mapping relationship of working condition fluctuation and gear design parameter, so that modulus, pressure angle, tooth width and the like parameter can adapt to the change of load, rotational speed, temperature, improve the problem that optimal parameter is difficult to determine in traditional design relying on artificial experience iteration.

The invention provides a differential gear mechanism and a design method thereof. In the differential gear mechanism of the present disclosure, a reference pressure angle of each side gear tooth of a side gear and a reference pressure angle of each pinion tooth of a pinion gear increase from an intermediate portion of a tooth trace toward an inner end side and from the intermediate portion toward an outer end side, and the reference pressure angle of each side gear tooth of the side gear and the reference pressure angle of each pinion tooth of the pinion gear increase from the intermediate portion toward the outer end side. The tooth thickness of the pitch cone of the side gear decreases from the intermediate portion of the tooth trace toward the inner end side and increases from the intermediate portion toward the outer end side. The tooth thickness of the pitch cone of the pinion gear increases from the intermediate portion of the tooth trace toward the inner end side and decreases from the intermediate portion toward the outer end side.

A method for linear diagonal modification of herringbone gears based on profile grinding, which relates to the technical field of gear transmission. The present invention is to solve the problems of low machining accuracy and low machining efficiency existing in the existing linear diagonal modification method for herringbone gears. The present invention includes: obtaining a standard tooth tip modification area and a standard tooth root modification area; obtaining the projection helix angle of the tooth tip modification starting line and the projection helix angle corresponding to the tooth root modification starting line; modifying the amount of discrete coordinate points in the standard tooth tip modification area, and obtaining the position vector and normal vector of the target tooth tip modification tooth surface; obtaining the modification amount of discrete coordinate points in the standard tooth root modification area, and obtaining the position vector and normal vector of the target tooth root modification tooth surface; optimizing with the pressure angle, module, and helix angle as optimization variables to obtain the optimal pressure angle, module, and helix angle for tooth tip and tooth root modification, and using the obtained optimal parameters to perform diagonal modification on the herringbone gear. The present invention is used for linear diagonal modification of herringbone gears.

The invention discloses numerical control equipment capable of continuously performing ultrasonic composite rolling on a gear and a control method, and relates to the technical field of gear machining, the numerical control equipment comprises a multi-axis moving platform, a workpiece shaft, a driving shaft, a rolling gear and an ultrasonic vibration assembly, the multi-axis moving platform has driving strokes of an X axis, a Y axis, a Z axis and a B axis, and the B axis is in the direction rotating around the Y axis; the end part of the workpiece shaft is used for clamping a gear to be machined; the driving shaft is parallel to the workpiece shaft, the driving shaft can be driven to rotate around the axis of the driving shaft, and the driving shaft is connected with the multi-shaft moving platform; the rolling gear is arranged at the end of the driving shaft and used for being meshed with a to-be-machined gear. The ultrasonic vibration assembly is connected with the rolling gear and applies ultrasonic vibration to the rolling gear. According to the numerical control equipment capable of continuously, ultrasonically and compositely rolling the gear and the control method, on the premise that the same modulus and pressure angle are met, ultrasonic rolling can be conducted on gears of different gear systems, and the ultrasonic rolling performance and efficiency are improved.

The application discloses a gear design optimization method based on a Bayesian algorithm, and relates to the technical field of gear design. A tooth surface geometric model is established based on the pure rolling relationship of a rack and a gear, a load stiffness coupling model is constructed by combining meshing partition and a tooth direction slicing method, contact and bending stress are obtained, and drive and non-drive side pressure angles, addendum height coefficients, dedendum fillet radius coefficients, radial variables and tooth widths are taken as design parameters. A multi-objective function of minimizing maximum dedendum bending stress, maximum contact stress and maximizing average overlapping degree is set. A Markov blanket structure is introduced to screen key variables, a Gaussian process is used to establish a proxy model, and an improved acquisition function based on an expected hypervolume is used for iterative optimization. The number of iterations, the improvement amplitude and the running time limit are taken as termination conditions. The optimal parameters are screened by combining a normalized comprehensive score. The gear design optimization method based on the Bayesian algorithm can improve the design accuracy of asymmetric high-overlapping gears and the efficiency of design parameter optimization.

The invention provides a variable-pressure-angle variable-modulus tooth profile machining process method. The variable-pressure-angle variable-modulus tooth profile machining process method is characterized by comprising the steps that A, raw materials are forged; b, the forged blank is subjected to semi-finish turning, scribing and drilling; c, a transition tooth profile is designed, and gear hobbing is conducted according to the gear hobbing technology requirement; d, rough gear grinding is conducted on the workpiece on a numerical control gear grinding machine, it is guaranteed that the tooth surface allowance is uniform, and the extension length meets the design requirement; e, the workpiece is subjected to carburizing and quenching heat treatment, and tooth surface hardness and hardened layer depth are guaranteed; f, the gear subjected to heat treatment is subjected to finish machining; g, gear grinding machining; h, magnetic powder inspection detection is conducted on the ground tooth part; i, finally carrying out pickling detection; and J, final inspection. The carburized and quenched gear of the wind power gear box can be machined without special hob machining.

The utility model discloses a transfer gear bevel gear set structure of a gearbox of a 5-ton loader. The transfer gear bevel gear set structure comprises transfer gears, a variable-speed pump shaft gear and a steering pump shaft gear. The transfer gear, the variable-speed pump shaft gear and the steering pump shaft gear are all of a helical tooth structure, the tooth number of the transfer gear is Z53, the tooth number of the variable-speed pump shaft gear is Z53, the tooth number of the steering pump shaft gear is Z63, the pressure angle is 20 degrees, and the helical angle is 15 degrees. The distance between the transfer teeth and the shaft gear of the variable-speed pump is 183 + / -0.03 mm, and the distance between the transfer teeth and the shaft gear of the steering pump is 203 + / -0.03 mm, so that a transfer tooth bevel gear set structure is installed on an original box body, and the transmission precision is ensured. The transfer gear set is stable in transmission, low in vibration and noise and high in bearing capacity, and solves the problems of high vibration and noise and weak bearing capacity during transmission of the transfer gear set in the prior art.

The invention discloses a method for calculating the cross-ball distance of asymmetric inner and outer back taper teeth. The method comprises the following steps of: 1, solving basic parameters of a workpiece, wherein the basic parameters comprise a base circle diameter, an original circle division end surface pressure angle and actual circle division helical angles on the left and right sides of an inclined back taper; 2, deducing the cross-ball distance at the position L of any cross section of the tooth pitch large end of the outer inclined back taper: solving the tooth thickness of the original large end face of the outer inclined back taper, the arc tooth thickness of the end face of any T cross section, the equivalent original normal arc tooth thickness of the T cross section, the equivalent original circle dividing normal displacement coefficient, the involute angle of the equivalent ball measuring center circle pressure angle of the T cross section and the ball measuring center circle pressure angle; and finally, calculating the cross-ball distance of the cross section of the odd and even teeth of the outer inclined inverted conical teeth at any distance L from the large end. According to the method, a solution is given, a calculation formula of the solution is deduced and the technical problem is solved by aiming at the difficulty of the cross-ball distance of the inner and outer inclined inverted conical teeth of the large gear ring, a theoretical calculation method of the cross-ball distance of the inverted conical teeth is perfected through three-dimensional modeling verification that the error is extremely small, and the method has guiding significance on field processing and detection of the inclined inverted conical teeth.

The invention discloses a special tooth root digging and gear shaping method. The method comprises the following steps of firstly calculating involute meshing starting circles dnf1 and dnf2 of two gears by utilizing the tooth number Z, modulus m, pressure angle alpha and mounting center distance a of paired meshing gears; calculating the tooth space width K at the starting circle dnf of the gear according to a standard calculation formula; and after the value of K is determined, a single tooth root shaping method is adopted, the width of the slotting tool is equal to the tooth groove width K, the slotting tool is aligned with the tooth groove center of the standard reserved grinding gear to shape the tooth root, and the tool can be stopped when the tooth root circle diameter df is equal to (Z-2. 5) m. A special tooth root digging gear shaping method is adopted to replace a special reserved grinding root digging hob, and the problems that the special reserved grinding root digging hob is narrow in adaptability, high in price and high in cost are solved.

In a gear pair in which a first gear and a second gear having a greater number of teeth than the first gear share a meshing line of teeth that mesh with each other, at least a part of the meshing line includes a region where a pressure angle is not constant, the pressure angle monotonously decreases in a section of the meshing line from a pitch point to an end point on a tooth-top side of the first gear, and a relative curvature of tooth profile curves of the first and second gears in the section of the meshing line from the pitch point to the end point on the tooth-top side of the first gear is smaller than or equal to a maximum value of the relative curvature in a section from the pitch point to an end point on a tooth-root side of the first gear.

The present application provides a drive gear of a fishing reel. The drive gear (11) has a circular plate portion (30) and a plurality of gear teeth (31). The circular plate portion (30) has a rotational axis (X). The plurality of gear teeth (31) respectively protrude from a side surface on an outer peripheral side of the circular plate portion (30) in a direction extending toward the rotational axis (X). The gear teeth (31) have a main body portion (32) and an extension portion (33). A first angle (a11, a12) formed by a cylindrical surface (CP1) passing through a tooth top surface (31c) of the main body portion (32) and a radially inner side surface (31d) of the extension portion (33) is larger than an engagement pressure angle (b). Accordingly, the present application provides a drive gear of a fishing reel capable of improving a rotation feeling.

The invention discloses a full-automatic blowout preventer turnover device and a control method, and relates to the technical field of blowout preventer turnover control, and the device comprises a base, a turnover beam, a turnover base, a hydraulic cylinder group, an arc-shaped supporting plate, a pulley vehicle, a hydraulic locking pin and a control system. The base is arranged below the overturning base, the overturning beam is rotationally connected with the overturning base, the arc-shaped supporting plate abuts against the blowout preventer, the hydraulic locking pin limits relative rotation of the overturning beam and the overturning base, and the control system is electrically connected with all execution components. According to the control method, overturning of the blowout preventer is achieved through mode switching, staged linkage overturning and automatic control of the locking pin, an overturning load threshold value is dynamically calculated through the weight sensor and the pressure sensor, the gravity center of the blowout preventer is inversely calculated in combination with pressure-angle data in the initial overturning stage so as to calibrate parameters, and the overload protection and state monitoring functions are achieved. The automatic degree, safety and adaptability of blowout preventer overturning operation are improved, and the blowout preventer overturning device is suitable for blowout preventer overhauling in the field of petroleum drilling.

This utility model relates to the field of seismic testing equipment technology, and in particular to a testing device for the seismic performance of building structures. It includes a housing and a rebound hammer body. The housing is fixedly connected to the outer surface of the rebound hammer body. An adjustment mechanism is provided inside the housing. The adjustment mechanism includes a U-shaped plate, an adjustment cylinder, a buffer cylinder, a buffer plate, and a connecting rod. A U-shaped groove is formed on the side wall of the housing. The U-shaped plate is slidably connected to the inner side wall of the U-shaped groove. This utility model, through the cooperation of the U-shaped plate, housing, and suction cup, utilizes the adjustment cylinder and suction cup to apply pressure to the rebound hammer. First, the sealing plate is squeezed to firmly fix the suction cup to the U-shaped plate. Then, the housing and rebound hammer can only move perpendicularly towards the wall along the U-shaped plate, ensuring the accuracy of the pressure angle and avoiding errors caused by angle deviation, thus maintaining the accuracy of the test results.