4154 results about "Impact" patented technology

The invention provides a multifunctional bearing test device, which comprises a rotation driving system unit, a loading system unit, a high and low temperature environment box, a lubrication cooling system unit and a measurement control system unit, and is characterized in that the loading system unit can control the loading force and the loading waveform of loading heads on an axial loading unit and a radial loading unit, and the high and low temperature environment box can realistically simulate a real temperature environment of a test. The multifunctional bearing test device can simulate service conditions of a test bearing in a test room, realizes performance testing for the test bearing under conditions of given rotating speed, lubrication, temperature, axial load, radial load and circumferential unbalanced impact load and the like, and analyzes influences imposed on the bearing performance by misalignment, poor lubrication, uneven stress and the like through data such as vibration acceleration, abrasive dust amount and the like acquired in the testing process, thereby being capable of more authentically simulating actual conditions of a rolling bearing when being subjected to the radial load, the axial load and the like, and being more reliable, systematic and scientific in service life and reliability evaluation for the test bearing.

A vehicle body reinforcing structure for coping with a small overlap collision may include front side members which may be extended in a longitudinal direction of a vehicle and disposed at left and right sides in a width direction of the vehicle, a crash box which is installed to a front end of the front side member in the longitudinal direction of the vehicle and absorbs and reduces impact when receiving the impact to be deformed, a bumper beam which is disposed in front of the crash box in the longitudinal direction of the vehicle, coupled to the crash box, and extended in the width direction of the vehicle, and a reinforcing member which is coupled to both the crash box and the front side member, and protrudes outside of the bumper beam in the width direction of the vehicle to transfer an impact energy to the front side member.

The invention discloses a front longitudinal beam structure for automobiles, in particular discloses a novel front longitudinal beam structure adaptive to impacting energy absorption of automobiles. In the invention, the front longitudinal beam structure is divided into four segments as follows: the first segment is a front longitudinal beam foremost segment which is subjected to deformation firstly on the front longitudinal beam during impacting, a second segment is an indeformable segment, a third segment is a strength-variable segment and can be subjected to deformation during impacting, and the fourth segment is an indeformable segment in which a destructible filling material is filled. Compared with the traditional front longitudinal beam structure, by adopting the front longitudinal beam structure in the invention, the energy absorption capability of the front longitudinal beam can be improved, the automobile body invasion amount can be reduced, the acceleration of front impact of an automobile can be reduced, and the safety of the front impact of the automobile can be improved effectively.

A crash energy absorption member capable of reducing the initial load without provision of a crushing bead and capable of achieving a sufficient amount of shock absorption with stable buckling behavior. The crash energy absorption member is formed from a tubular body which has a length L and a polygonal transverse cross-sectional shape with 2n corners due to having 2n ridge lines (wherein n is a natural number greater than or equal to 3) and 2n surfaces partitioned by these 2n ridge lines, and which absorbs impact energy by buckling when an impact load is applied to one end in the axial direction towards the other end, characterized in that some of the 2n ridge lines only exist in a region which extends from a position spaced by a distance h in the axial direction from the one end to the other end, and if the number of the remaining ridge lines which have a length L is m, the following equations are satisfied:

h≦L×0.30   (1)

4≦m≦2×(n−1)   (2).

The invention discloses a plate clamper platform for a falling weight impact test, and an impact speed measurement method. The plate clamper platform comprises a clamper structure, a supporting lifting structure and a laser sensor, wherein the clamper structure comprises a plate clamping device, a multi-angle rotation device and a clamper bottom plate, the multi-angle rotation device comprises wall plates, wall plate bolts and a bottom plate bolt, each wall plate is provided with a central hole and two arc-shaped grooves, the two arc-shaped grooves are symmetrically arranged relative to the central hole, clamping plates can rotate along the arc-shaped grooves after the wall plate bolts are completely loosened, the supporting lifting structure comprises a platform and a lifting driving device, the clamper bottom plate can rotate by adopting the bottom plate bolt as the center and can slidably move along a straight strip hole, and the laser sensor is arranged below the weight tray positioned on the periphery of a hammer head. With the plate clamper platform and the impact speed measurement method of the present invention, the composite material plate specimen can be tightly clamped, the multi-angle impact on the specimen can be achieved, and the speed change during the drop hammer falling and impact process can be real-timely measured.

A slide hammer includes three major components, namely, a guide sleeve, a plunger and an impact head. The plunger is inserted within the guide sleeve. The impact head is secured within the distal end of the guide sleeve, and has a portion which protrudes from the guide sleeve distal end. The impact head is able to freely slide within a segmented portion of the guide sleeve distal end, or the impact head movement may be controlled by a spring. The plunger is slid within the guide sleeve at a selected velocity in order to contact the portion of the impact head slidably secured within the guide sleeve. The force of the plunger striking the impact head is transmitted through the impact head to a targeted object in contact with the protruding portion of the impact head. The impact head may be fitted with various types of tips. Each of the tips has particular advantages in applying force to a targeted object.

Apparatus and methods for securing a first structural member and a second structural member to one another. In one embodiment a two-piece fitting is provided. The fitting includes a variable gap between attachment surfaces, enabling the fitting to accommodate structural members of variable thickness. The fitting also includes overlapping sections that provide increased resistance to pull-off loads and impact loads. The configuration of the fitting advantageously simplifies the assembly process and preserves the integrity of the adhesive to form a strong joint.

The invention discloses a hybrid bit for petroleum gas exploitation and other exploration drilling applications, wherein cones and blades are simultaneously arranged on a bit main body and are uniformly distributed in a staggering manner, and the cones are arranged on a tooth palm of the bit main body; the hybrid bit further comprises a movable blade body movably arranged in the bit main body and only capable of telescopically moving within a limited range along an axial direction, an elastic element for providing axial force for the movable blade body is also arranged between the movable blade body and the bit main body, the blades are arranged at the front end of the movable blade body, and a compression face for bearing mud pressure is arranged at the tail end of the movable blade body. The self-adapting hybrid bit disclosed by the invention is capable of controlling the relative positions of the cones and the blades in a self-adapting manner according to stress, thereby optimizing the rock breaking quantity distribution of the cones and the blades and guaranteeing a faster rock breaking speed, and the applicability is more extensive. Besides, by the self-adapting design, the rigid impact of common bits and rock stratum is optimized to flexible impact, so that the bit is greatly protected.

In at least one illustrative embodiment, an impact tool may comprise an impact mechanism including a hammer and an anvil. The hammer may be configured to rotate about an axis and to translate along the axis to impact the anvil to cause rotation of the anvil about the axis. The impact tool may further comprise a motor, a drive train, an inertial sensor, and an electronic controller. The drive train may be configured to transfer rotation from the motor to the hammer of the impact mechanism. The inertial sensor may be configured to sense an acceleration of the drive train along the axis. Further, the electronic controller may be operably coupled to the motor and to the inertial sensor and configured to decrease a rotational speed of the motor in response to determining that the acceleration of the drive train has exceeded a threshold acceleration.

An analysis method includes the steps of: measuring a swing of a golf club to which a sensor capable of measuring accelerations in directions of three axes and angular velocities or angles about the three axes is attached; obtaining an index for classifying the swing based on a measuring result of the sensor; and classifying the swing based on the index. The index includes the item (a) or (b): (a) a grip angular velocity at least at one time during a downswing; and (b) a grip velocity at least at one time during the downswing. Preferably, times of an address, a top, and an impact are determined in the analysis method.

The invention discloses a magnetorheological buffering unit structure based on impact load and a control method thereof, aiming to mainly solve the technical problems that parameters of an oil-gas type buffer cannot be adjusted in working process, and accordingly a landing gear buffer cannot be balanced with a large power energy source required from outside for realizing ground sliding, landing off and actively controlling the landing gear. The magnetorheological buffering unit structure comprises a magnetorheological damper and a magnetorheological liquid chamber, and the magnetorheological liquid chamber can move in the magnetorheological damper through a sealing device. During testing, the unit structure main body is mounted on an impact test platform. Variable-structure oil holes of a conventional oil-gas type buffer are replaced by oil-needle-free constant-interface oil holes, passed oil damping force is controlled by applied magnetic field, and magnetic field is supplied by applied current. The magnetorheological buffering unit structure is reasonable in structure and capable of buffering impact energy produced by impact force effectively, and meanwhile, oil return holes can prevent wheels from jumping off the ground while landing. The magnetorheological buffering unit structure has functions of an oil-gas type passive-control buffer, realizes half-active buffer control effect, and is mainly applied to the technical field of aviation.

The invention discloses an experimental device and an experimental method of impact drawing-twisting load, belonging to the field of impact dynamics experiments. The experimental device comprises a drop hammer, a test piece, an impact force transfer device, a loading disc, a measuring device and a test piece fixing device; the drop hammer drops down to impact a transmission target, the transmission target moves on a track after being impacted, a base is provided with a prestress loading device, the prestress is applied to an impact target through an adjusting threaded rod, two sides of the impact target are respectively connected to the loading disc through steel wire ropes, each steel wire rope is provided with a force sensor, the disc transfers the drawing force and twisting force to a reinforcing steel bar of the test piece, and a metal strain gauge is attached inside the reinforcing steel bar of the test piece and used for measuring the stress distribution along the anchoring length of the reinforcing steel bar. According to the experimental device and the experimental method, the bond stress distribution of a reinforcing steel bar concrete anchoring reinforcing steel bar under the drawing and twisting load effects of the impact is researched, and a powerful foundation is set for researching a constitutive relation of anchoring bond slip under the effect of complicated stress.

System for controlling a door enabling driving from an initial position of its travel in a first direction at a speed v1 as far as a final position, said control system comprising a safety function comprising means for keeping a door in operation despite its having suffered an impact against an obstacle situated on its travel and enabling it to continue its initial movement automatically as soon as said obstacle is removed, through a design reconciling a sufficiently high normal speed of movement v1 of the door with the intention to prevent damage both to the obstacle and to the door by reducing the speed to v3<v1 close to the stored position of the impact.

The invention belongs to the field of mechanical arm track planning with force restriction taken into consideration, and particularly relates to a six-degree-of-freedom mechanical arm track planning method with force restriction taken into consideration. The method comprises the steps that (1) force restriction is converted into restriction of contact deformation and contact kinematic velocity; (2) the mechanical arm kinematic velocity of dynamic contact impact is optimized; and (3) track planning is conducted based on force restriction. According to the six-degree-of-freedom mechanical arm track planning method with force restriction taken into consideration, the force restriction is converted into restriction of contact deformation and contact kinematic velocity; then according to contact kinematics, an optimization method for the mechanical arm kinematic velocity with the dynamic contact impact taken into consideration and a continuous track planning method with contact deformation taken into consideration and based on different contact edges are researched; and the optimization method and the continuous track planning method are new methods for mechanical arm track planning with force restriction taken into consideration. According to the six-degree-of-freedom mechanical arm track planning method with force restriction taken into consideration, the situation that the contact impact process of the tail end of a mechanical arm and an outer environment is completed in a super short time, great instant impact is generated, and contact force is made to exceed a safety range is avoided.