11678 results about "Impact" patented technology

A power tool includes a housing, a motor being controlled to run at a speed between 15,000 rpm and 32,000 rpm, an output spindle, a rotary impact assembly configured to transmit rotational motion with intermittent rotational impacts from a cam shaft to the output spindle, a hammer of the rotary impact assembly having an inertia between 400 kg·mm2 and 3,000 kg·mm2, and a single stage compound planetary transmission including a first planet gear meshed with a sun gear and a second planet gear meshed with a ring gear, the compound planet gear being carried by a planet carrier to achieve a gear reduction ratio between 14:1 and 30:1. The power tool is configured to achieve a fastening torque of at least 900 foot-pounds (a) in a time of less than 3.5 seconds, and / or (b) with an input energy of less than 2,500 Joules.

Impact-protection systems, devices, and components, as well as methods of manufacturing, integrating, and using the same, e.g., in connection with different vehicles including electric vehicles. The impact-protection systems described herein can be configured to be attached on the lateral sides of a vehicle and / or under or at least partially under a chassis frame of a vehicle to cover, enclose, and / or protect vehicle structures mounted in these areas. The impact-protection systems can include multiple configurations, e.g., being formed using brackets, panels, compartmented structures, fairings, and / or layers of different materials. The components of the impact-protection systems can be produced, assembled, and installed using efficient and cost-effective manufacturing and assembly methods. The impact-protection configurations described herein help reduce the concentration of impact-forces.

The invention relates to the technical field of bolt mounting equipment, in particular to an angle steel tower bolt perforation mounting method. By means of autonomous navigation of the installation robot and flexible operation of the mechanical arm, rapid positioning and taking-out of bolts and nuts are achieved, and the risk of manual climbing and operation is reduced. Accurate insertion and preliminary positioning of the bolt are ensured through accurate control of the mechanical arm, then the fastening effect is enhanced by combining impact tightening with the intermittent hammering technology, the fit clearance between the angle steel is effectively eliminated, and the bolt is prevented from loosening. The whole process is highly automatic, personal errors are reduced, and the mounting quality and the working safety are improved.

The present application relates to the technical field of purification equipment, and in particular, to a vibration damping and noise reduction device, a fan, and a range hood. The vibration damping and noise reduction device includes a damping plate, a buffer plate, and an elastic buffer member. The damping plate and the buffer plate are spaced apart facing each other, and the damping plate is used to fit with the fan cover plate. The elastic buffer member is disposed between the damping plate and the buffer plate, and both ends of the elastic buffer member are respectively abutted against and connected to the buffer plate and the damping plate. The elastic buffer member can expand and contract in a direction perpendicular to the damping plate, so that when the fan operates and generates vibrations, the expansion and contraction deformation of the elastic buffer member can extend the time of vibration transmission to reduce the impact force generated by the vibration. Furthermore, under the combined action of the damping effect of the damping plate and the elastic buffer member, the vibration of the fan can be more effectively alleviated, and the working noise of the fan can be reduced.

The invention discloses a control method and system of a vehicle, the vehicle and a computer program product. The method comprises the following steps: acquiring road information of a to-be-controlled vehicle in a current driving direction; in response to the fact that the road information shows that an abnormal road surface object exists in the current driving direction, position information of the abnormal road surface object and a driving track of the to-be-controlled vehicle in a future time period are obtained, and under the condition that wheels of the to-be-controlled vehicle pass through the abnormal road surface object, impact force borne by the wheels of the to-be-controlled vehicle is larger than an impact force threshold value; determining a current distance between the wheel and the abnormal road surface object in response to the position information included in the driving track; based on the current distance, damping force corresponding to the wheels is adjusted before the wheels run to the abnormal road surface object; and the adjusted wheels are controlled to run through the abnormal road surface object, so that the impact force borne by the adjusted wheels is smaller than or equal to the impact force threshold value. The technical problem that the control effect of the vehicle is poor is solved.

The invention relates to a dynamic analysis optimization method for a high-speed stamping hybrid mechanism with a lubricating gap and considering an impact load. The dynamic analysis optimization method comprises the following steps: S1, defining structural parameters and design parameters; s2, establishing a lubrication gap motion model, a contact force model and an oil film bearing force model; s3, introducing a flexible beam unit model; s4, the relative motion state of the bearing and the shaft at the revolute pair element is judged; s5, establishing a kinetic equation; s6, solving the kinetic equation; s7, optimizing and improving the structural parameters of the mechanism; and S8, circulating the above process, and carrying out iterative solution until the kinetic analysis and parameter optimization are completed. The established rigid-flexible coupling kinetic equation containing the lubricating gap can more accurately predict the mechanism dynamic response characteristics of the high-speed stamping hybrid mechanism when the high-speed stamping hybrid mechanism is subjected to the impact load in actual work and operation, and the modeling method is suitable for dynamic response characteristic analysis and optimization design of high-speed stamping mechanisms of other configurations. The method has the advantages of wide applicability and the like.

A chassis assembly for a vehicle is provided. The chassis assembly includes: an upper frame structure having at least two longitudinally extending upper side regions arranged on opposite sides of a longitudinal centre line. The upper side regions are connected to each other by upper connection portions. A front crash structure is configured to absorb energy during an impact generated from a vehicle collision, and extends in a transverse direction. The upper frame structure is connected to said front crash structure; wherein said chassis assembly further comprises: a lower frame structure having at least two longitudinally extending lower beams arranged on opposite sides of the longitudinal centre line, said lower beams being connected to each other by lower connection portions, and said lower frame structure is connected to said upper frame structure and to said front crash structure.

The invention discloses a buffering, shock-proof and anti-collision conveying box for precision equipment, and relates to the technical field of conveying boxes, the buffering, shock-proof and anti-collision conveying box comprises a specially-made wooden box body, a plurality of groups of shock-absorbing blocks are arranged in the specially-made wooden box body, a plurality of groups of shock-absorbing and anti-collision mechanisms are arranged in the shock-absorbing blocks, and a plurality of groups of screw rods are arranged in the specially-made wooden box body. A lead screw is arranged in the special wooden box body, an oblique bevel gear is fixed to one end of the lead screw, a transmission rod is arranged in the special wooden box body, and a plurality of sets of movable supports are arranged in the special wooden box body and meshed with the lead screw. During continuous slight vibration, the contact area is reduced, friction is reduced, meanwhile, a lead screw drives a damping block to be attached to equipment to eliminate resonance, a damping anti-collision mechanism is triggered to work through violent impact, a spring and a damper absorb energy, when the impact exceeds the limit, the damper drives a gear mechanism to open an air valve, and an air bag expands to absorb impact force; the sliding block sleeve guides the expansion direction of the air bag to prevent damage, and the whole system can be dynamically adjusted according to actual impact strength to effectively cope with vibration and impact in transportation.

A rotary impact tool includes a motor and an impact mechanism. The impact mechanism includes a cam shaft with a first cam groove rotatably driven by the motor, a cam ring received over the cam shaft with a second cam groove on its inner surface and a third cam groove on its outer surface, a hammer received over the cam ring with a fourth cam groove on its inner surface, an anvil with an output shaft and configured to be selectively engaged by the hammer, a spring configured to bias the hammer toward the anvil, a first ball received in the first and second cam grooves to couple the cam ring to the cam shaft, and a second ball received in the third and fourth cam grooves to couple the hammer to the cam ring.

The invention discloses a tumble detection method, wearable equipment and a storage medium, relates to the technical field of tumble detection, and discloses a tumble detection method applied to the wearable equipment, the wearable equipment comprises an acceleration sensor and at least one other sensor except the acceleration sensor, the tumble detection method comprises the following steps: acquiring acceleration data acquired by an acceleration sensor based on a time sequence; if the acceleration data accord with the free falling acceleration performance in the first time period and accord with the impact rebound acceleration performance in the second time period, it is judged that a falling impact event is detected; in response to the falling impact event, obtaining a falling detection result determined based on detection data collected by other sensors; and if the tumble detection result is that the tumble event exists, triggering a tumble event response process. On the basis, when falling impact is detected, detection and identification are carried out based on other sensor parameters, so that the falling detection accuracy of impact caused by falling is improved.

The invention discloses a manipulator clamping force control method and device based on motor driving, and relates to the field of intelligent manipulators. Comprising the following steps that the mass of a to-be-clamped object is obtained, and basic friction force is calculated; collecting object shape characteristic parameters such as the maximum boundary length, the outer surface area and the volume, and calculating a shape influence coefficient; then, acquiring surface characteristic parameters such as average curvature, irregularity and projection area, calculating a surface concave-convex coefficient, and generating a shape complexity index in combination with the shape influence coefficient; then, acquiring material characteristic parameters such as hardness and elastic modulus, determining and correcting a basic friction coefficient, and calculating friction force; and finally, the instantaneous speed of the clamping task of the manipulator is obtained, the impact load is calculated, the basic friction force is corrected based on the parameters, the accurate clamping force is obtained, and therefore the accurate control over the clamping force of the manipulator is achieved. According to the method, the clamping effect and safety are improved, and the method is suitable for various clamping scenes.

A bi-directional pneumatic impactor for imparting impact forces to an object. The impactor includes a support structure having at least one grip member and a piston reciprocally moveable along a piston axis. A pressure control system coupled with the support structure and adapted to be connected to a supply of pressurized air. The pressure control system reciprocatingly moves the piston along the piston axis to generate forceful impacts at one or both ends of the reciprocal movement. An impact transfer assembly disposed on the support structure is adapted to be coupled with the object whereby the impact transfer assembly transfers impact forces to the object in the driving and / or the retracting directions. A control spool may be used to control the supply of pressurized air to the piston cylinder. The impact transfer assembly may include a hammer pin extending axially through the piston.

The invention discloses a sliding bearing-rotor system stability test system and method under an impact load, and relates to the field of rotating machinery test in mechanical engineering. According to the technical scheme, different types of impact loads are applied through a vibration acceleration platform, and starting, stopping or external impact force in actual working conditions is simulated. In the testing process, a high-precision sensor and a multi-channel acquisition board card are used for monitoring the vibration characteristic and the rotating speed of the system in real time, it is guaranteed that signals of different positions and types can be synchronously acquired, and comprehensive system state information is provided. Then, in combination with time domain and frequency domain analysis technologies, key features are extracted from mass data by applying an advanced Fourier transform algorithm, the resonant frequency, modal characteristics and potential fault modes of the system are identified, and accurate evaluation of the stability of the system is realized. Experimental results show that the real-time monitoring and analysis method can effectively improve the stability test precision of the sliding bearing-rotor system under the impact load, and provides powerful technical support for engineering application. The method is used for evaluating the stability of the sliding bearing-rotor system under the impact load.

The invention discloses a self-adaptive variable impedance algorithm for hydraulic four-foot support unloading, which comprises the following specific steps: step 1, single-cycle variable impedance control: introducing a variable impedance control strategy in a single-step cycle, judging that a robot is subjected to large impact when a large force change rate is detected by a force sensor, and judging that the robot is subjected to large impact when the force change rate is larger; at the moment, expected force is rapidly adjusted to achieve force unloading, and therefore impact damage to structural parts is reduced; step 2, dynamic impedance coefficient adjustment: when it is detected that the impact force change rate exceeds a preset threshold value or the speed is increased, the impedance coefficient is dynamically reduced to reduce rigidity and improve flexibility, and rapid force unloading is assisted; and step 3, performing impact detection and real-time response. The hydraulic quadruped robot can dynamically adapt to complex tracks and stress changes, compliant control and whole-course stable operation are achieved, the unloading efficiency and the structural reliability are improved, the compliance and the movement capacity are also considered, and reliable support is provided for efficient walking of the hydraulic quadruped robot in the complex environment.

The invention relates to the technical field of transformers, in particular to a marine transformer with an anti-impact structure, which comprises a transformer main body, a base and a buffer box, and is characterized in that the transformer main body is horizontally limited and mounted on the base through a movable frame, and a buffer spring is arranged between the transformer main body and the base and is used for absorbing fine vibration during ship navigation; the buffer box is flexibly connected to the top of the transformer body through the supporting spring to adjust the oil quantity of the transformer body; a dynamic locking mechanism composed of a floating frame and a movable ball is arranged in the base, the movable ball supports the floating frame so that the transformer body can freely buffer vibration, and when a ship inclines greatly, the movable ball deviates so that the floating frame can move downwards. An oil fluctuation protection structure composed of an arc panel and a movable rod is arranged on the inner wall of the buffer box, when oil shakes violently, the movable rod is pushed to move outwards, and a lever type supporting rod is linked to make a bottom rubber wheel abut against the ground to form lateral supporting; the purpose of improving the marine impact resistance of the oil-immersed transformer is achieved.

The invention relates to the technical field of detection devices, and discloses a gear impact fatigue detection device which comprises a detection table and a plurality of supporting legs fixedly installed on the lower surface of the detection table, a T-shaped arc sliding groove is formed in the upper surface of the detection table, and an arc T-shaped sliding block is installed on the inner wall of the T-shaped arc sliding groove in a sliding mode. An arc T-shaped sliding block is manually pushed to slide along the inner wall of a T-shaped arc sliding groove, a rotating sleeve drives an impact block to adjust the impact position, a plug pin is inserted into an insertion hole to limit the position of the impact block, and when a spiral cam rotates, a push-pull rod is driven by a driving column to move away from a gear body, so that the impact position is adjusted. The impact angle of the impact block can be conveniently adjusted through the device, so that the device can detect impact resistance data of different positions of teeth of the gear body, and the reliability of the data is greatly improved.

The invention discloses a high-temperature and high-pressure multifunctional integrated shock tube test system, belongs to the technical field of explosion and impact dynamics tests, and aims at solving the problem that an existing shock tube is usually single in function and is only used for a simulation test of a certain function. The high-pressure section and the low-pressure section of the shock tube are both made of high-temperature-resistant nickel-based alloy, an induction heater is adopted for heating, high-pressure inert gas is filled into the high-pressure section through pressure gradients of diaphragm sets with different layers of diaphragm clamping sections, high temperature and high pressure of the high-pressure section at the temperature of 20-900 DEG C and the pressure of 0.1-50 MPa are obtained, and the high-pressure shock tube has the advantages that the high-pressure shock tube is compact in structure and low in cost. The multifunctional integrated shock tube test system can be used for researching the crushing characteristics of rock materials under the conditions of different pressures, temperatures, water contents and the like, the damage characteristics of explosion shock waves in the air to a target piece and the impact damage characteristics of a high-speed projectile body. Effective methods and means are provided for related research, and the shock tube test technology and engineering application capability are expanded. The test system is easy to implement, low in cost and multipurpose.

A blade for a fan of a gas turbine engine includes an airfoil section that spans along a radial direction between first and second radial ends, and a dovetail at the second end of the airfoil section. The airfoil section and the dovetail are comprised of a fiber-reinforced composite that includes inter-section fiber plies that each extend from the airfoil section into the dovetail and wedges that are interleaved with the inter-section fiber plies in the dovetail. The dovetail is asymmetric about the radial direction and has first and second circumferential sides that are sloped to face radially outwardly and form non-zero angles with the radial direction. One of the non-zero angles is 10° or less and a sum of the non-zero angles is from 35° to 45°.

The invention relates to the field of transmission towers, and discloses a tension type transmission tower buffer connecting device which comprises a supporting frame, a plurality of isolation assemblies are symmetrically arranged on the upper surface of the supporting frame, sliding seats are slidably connected into the isolation assemblies, and connecting rods are fixedly connected to the outer surfaces of the sliding seats. A belleville spring set is arranged between the outer surface of the sliding base and the inner wall of the isolation assembly, the belleville spring set is arranged on the outer surface of the connecting rod in a sleeving mode, and a telescopic rod and a first spring are fixedly connected between the outer surface of the sliding base and the inner wall of the isolation assembly. A primary buffer layer is formed by the belleville spring set and the first spring, axial impact force can be absorbed without sliding of the sliding seat during daily wind vibration and wire slight galloping, meanwhile, vibration can be restrained through the huge static friction torque of the fan-shaped friction face and the friction ball in the omnidirectional damping assembly, the circuit is kept stable, and slight load impact is effectively dealt with.

A tape measure including an elongate tape blade is shown. The tape measure includes a protective bumper that extends below the tape opening. The bumper is shaped to allow the tape hook to pivot during drop or impact to reduce the impact force experienced by the tape hook.

The invention relates to a shock absorption structure (50), particularly for motor vehicles, having a principal direction (DP) of shock absorption, and comprising at least one profiled element (51) made of composite material containing reinforcing fibers, this profiled element having a substantially cylindrical shape having a generating line, this generating line being oriented along the principal direction of shock absorption.

The invention discloses an impact resistance testing device and method for carton production, and relates to the technical field of impact testing devices.The impact resistance testing device comprises a baffle, four supporting frames and sliding rods are arranged at the upper end of the baffle, a top cover is arranged at the upper ends of the four supporting frames, and a transmission chain is arranged between the top cover and the baffle; a carton is arranged in the middle of the upper end of the baffle, a pressure applying mechanism for carrying out impact test on the carton is arranged among the four transmission chains, and an impact mechanism for changing the impact area to carry out impact resistance test on the carton is arranged in the pressure applying mechanism. According to the invention, a plurality of impact testing methods are provided through cooperation of the pressure applying mechanism and the impact mechanism to simulate various pressures and impacts possibly encountered in the actual transportation and storage process of the carton, so that the pressure resistance and the impact resistance of the carton can be evaluated more accurately; and the transmission chain controls the pressing force of the pressing mechanism, so that the bearing capacity of the carton can be quantified, and the deformation degree and the limit value of the carton under different pressures are determined.

The invention discloses a piezoelectric ceramic stack driven impact press-in test method and a test system thereof. According to the invention, a piezoelectric ceramic stack is used as a drive, a sample is carried on a displacement table, measurement parameters in an impact press-in test are monitored through a force sensor and a displacement sensor, a computer is used for realizing accurate control and subsequent processing and analysis of the measurement parameters, and the whole test adopts electric control actuation; the device is simple in structure and convenient to operate and control, the pressure head can be accurately controlled to be impacted and pressed into the surface of a sample at a certain speed, and the maximum press-in load and the maximum press-in depth in the impact press-in process can be estimated according to the maximum output displacement of the pressure head under the free condition; compared with other impact press-in tests, the impact press-in test method has the advantages that the safety and the stability are well guaranteed, and the impact press-in test method has great application potential.

The invention provides a test device for simulating ejection impact load, which is characterized in that side columns of the test device are fixedly arranged, a movement guide rail is arranged on the inner wall of each side column along the vertical direction, a variable stiffness spring is arranged below each movement guide rail, and an electromagnet is arranged at a certain height between the two side columns. The load block is connected with the electromagnet under the magnetic force effect of the electromagnet, the two ends of the load block are slidably connected with the movement guide rails, the impact force sensor is arranged on the load block, the lower bottom face of the impact force sensor is flush with the lower end faces of the two ends of the support, and the model box is arranged below the load block and filled with soil. The surface of a soil body in the model box is flush with the upper end face of the variable-rigidity spring, each crank pulley mechanism is arranged on the corresponding side column and located above the variable-rigidity spring, and after the load block impacts the soil body for the first time and bounces, limiters in the crank pulley mechanisms move to the movement guide rails to prevent the load block from impacting the soil body again.

The utility model discloses an unmanned aerial vehicle undercarriage, relates to the technical field of unmanned aerial vehicles, and provides the following scheme that the unmanned aerial vehicle undercarriage comprises a connecting plate and a buffer mechanism arranged at the bottom of the connecting plate, the buffer mechanism comprises a working assembly and a buffer assembly, the working assembly comprises a supporting rod, and the outer wall of the connecting plate is fixedly connected with the supporting rod; a hollow column is fixedly connected to the bottom of the supporting rod, a sliding column is slidably connected to the inner wall of the hollow column, the buffering assembly comprises a first spring, the first spring is arranged on the outer wall of the sliding column, a connecting ring is fixedly connected to the bottom end of the sliding column, and a supporting head is fixedly connected to the bottom of the connecting ring. A user descends the equipment for parking, a supporting head can be inserted into the ground, a certain fixing effect is achieved, at the moment, a sliding column can retract into a sliding groove formed in a hollow-out column, the buffering and supporting effect is achieved through a first spring, the impact force of the unmanned aerial vehicle and the ground is reduced, and the internal equipment is prevented from being damaged by vibration.

A power tool comprises a housing, a motor assembly and an impact assembly configured to be driven by the motor assembly. The impact assembly comprises a hammer defining a hammer chamber therein and an anvil at least partially disposed in the hammer chamber and configured to rotationally drive an output shaft. The anvil comprises a body portion, an anvil chamber defined therein, and a reciprocating member configured to selectively move radially outwardly relative to the body portion to be selectively impacted by an impact member of the hammer so that the hammer selectively imparts rotational movement to the anvil. The anvil includes an active valve configured to control discharge of fluid from an anvil chamber to the hammer chamber. The active value variably opens based on variance of one or more physical characteristics of the fluid (e.g., at least one of volume, temperature, pressure, or viscosity of the fluid).

The invention relates to the technical field of welding industrial robots, and discloses a damping device for an arm of a welding industrial robot, which comprises a base, a mechanical base, a mechanical arm and an end effector, and a second spring in a damping cylinder at the top end of the damping device is matched with a damping column I of the mechanical base; arm weight, dynamic load and ground vibration borne by the base are effectively dealt with, it is avoided that vibration is transmitted to the mechanical arm to affect welding precision, a second spring releases energy through deformation conversion during vibration, the mechanical base and the arm are subjected to shock absorption, and when shock absorption is not needed, the mechanical base and the arm can be tightly connected through a top bolt and other components and absorb energy through friction rubber. The fixing rod is taken down when the connecting position of the end effector does not need damping, the first spring conducts damping on the connecting position of the mechanical arm and the rotating connecting block, the situation that the welding position is not accurate due to track deviation of the mechanical arm is avoided, the fixing rod is used for limiting and fixing when damping is not needed, and a friction plate on a connecting column can absorb vibration impact; efficient and accurate welding operation and stable operation of equipment are guaranteed.

The invention relates to the technical field of engineering structure protection, in particular to an energy consumption unit, a collision-resistant behavior prediction method and equipment thereof and a medium. A collision-resistant behavior prediction method of an energy consumption unit comprises the following steps that a tank body finite element model before filling and a tank body finite element model after filling are established in a modeling system, and impact force and bearing force along the axis of the empty tank body finite element model are applied to the two ends of the tank body finite element model respectively; respectively giving calculation parameters to the empty tank body finite element model and the filling part finite element model in a modeling system, and determining solving time according to the compression displacement of the filled tank body finite element model; and solving and calculating in a modeling system to obtain a predicted deformation behavior-I and a predicted force-displacement response curve-I of the tank body finite element model before filling and a predicted deformation behavior-II and a predicted force-displacement response curve-II of the tank body finite element model after filling, and completing collision-resistant behavior prediction of the energy consumption unit.

An impact tool includes: an impact mechanism, where the impact mechanism includes an impact block driven by a drive shaft and a hammer anvil receiving an impact from the impact block, and the hammer anvil is connected to an output shaft; and a controller configured to control an electric motor. The controller is configured to, when the impact tool is in a low-speed mode and it is detected that the impact mechanism applies an impact force to the output shaft, perform the operations periodically: determining that the impact mechanism impacts a preset number of times and controlling the electric motor to shut down for a preset period and then restart.

An impact wrench (10) including a rotary impact drive (22), wherein the rotary impact drive (22) has a drive shaft (28) running along a longitudinal axis (L), wherein the rotary impact drive (22) has a striker (30) arranged so as to be movable along the longitudinal axis (L), and an anvil head (32) which can be contacted by the striker (30) in a circumferential direction (U) relative to the longitudinal axis (L). The rotary impact drive (22) has at least one impact damper (40, 42, 44) which is configured to damp an impact of the striker (30) in a longitudinal impact direction (LR) parallel to the longitudinal axis (L), in particular on the anvil head (32). Thus undesired vibrations can be reduced or prevented, so that health risks associated with use of the impact wrench (10) can be reduced.