122 results about "Joint contact" patented technology

The invention relates to a robot contact force detecting method based on torque observation and friction identification. A robot kinetic model and a generalized momentum are adopted to establish a joint torque observer for detecting joint torque change caused by a tail end contact force; a mode of combining an exponential friction model and a sine cosine function is adopted to describe the joint friction effect of a robot provided with a harmonic gear driving structure, a joint torque observation quantity is utilized to identify a joint friction parameter when an end effector of the robot has no contact force effect, and a joint friction torque is calculated according to the identified friction parameter; the torque observation quantity in a theoretical operating state of the robot sis regarded as a system model error, and an accurate joint contact torque observation quantity is finally obtained after the influences of friction and the system model error are considered, and finally a tail end contact force is calculated through a force Jacobian matrix of the robot.

A semiconductor chip assembly includes a semiconductor chip that includes a conductive pad, a conductive trace that includes a pillar and a routing line, a solder joint and a ground plane. The pillar extends into an opening in the ground plane, the solder joint contacts and electrically connects the pillar and the ground plane, and the ground plane is electrically connected to the pad.

A rotor assembly and a method for fabricating the same are provided in which a solid rotor ring is formed at either end of a stack of laminated discs, the solid rotor rings yielding improved electrical and mechanical characteristics in a low weight assembly. The solid rotor rings are fabricated by brazing slugs between the end portions of the rotor bars, the braze joints contacting a large percentage (at least 90%) of the rotor bar end portions.

The invention discloses a simulation method of a shield tunnel joint structure, which is characterized by comprising the steps of: (1) setting joint units: dispersing joint contact surfaces into a plurality of nodes, wherein the nodes are mutually connected by the joint units of simulation springs, circumferential upper joint units have a plurality of layers to respectively simulate force transmission liners, bolts and gaskets in real joints, and the types of the joint units at the same layer are the same; (2) setting the rigidity, the boundary condition and the joint initial displacement Delta1 of initial springs; (3) applying load; (4) examining a first joint unit; (5) setting the normal rigidity of the spring according to the type of the joint unit; (6) judging whether all the joint units are set, if so, starting the next step (7), and if not, examining the next joint unit and retuning to the step (5); (7) counting the real displacement delta 2 of the joints; and (8) comparing the delta1 with the delta2, if the difference between the two is in the allowed range tol, completing the account, and counting the deformation of the joints in the tunnel, and if the difference between the two is over the allowed range, counting the imposed load of the tunnel according to the delta2, and returning back to the step (3) to reapply the load. Based on the structure characteristics of theliner structure joints, the method builds the mechanical model of the liner structure joints, dynamically adjusts spring parameters in the process of counting according to the obtained node spring stress or the normal displacement, and uses joint models to count the whole ring liner structure. The method can consider the performance of the circumferential joints and the longitudinal joints of theliners, count the inner force and the deformation of the duct pieces and the joints of the liners, and more exactly show the status of deformation and force of the duct pieces.

The invention relates to a portable 120-to-400mm2 aluminum conductor steel reinforced cable shunting clamp and a use method thereof. The shunting clamp includes an O-shaped ring locking screw, a shunting clamp main body, an upper electric connection pressing block, a lower electric connection pressing block, a locking rod, a jacking and pressing spring, an insulating handle, an angle-variable terminal plate, a crimping electric connection joint and a soft copper wire; the clamp is lifted to an operating position of a heat emitting point of a busbar, a cross busbar and a lambda-shaped line, and safe distance of electrified operation of corresponding voltage levels can be maintained, and electrified direct connection or short circuiting can be realized. The clamp of the invention can be assembled and disassembled. The integrated combined clamp is convenient to transfer and store and can be applicable to 120-to-400mm2 aluminum conductor steel reinforced cables in six specifications in different transformer substations, 36 kinds of conductor section change conditions and operation of joint contact heat emission and short circuiting shunting. With the clamp adopted, emergencies and defects can be eliminated fast through electrified operation, and control on conditions, environment and other dangerous points of an operation field can be realized. The clamp of the invention is safe, convenient and fast in operation, and can assist in improving the reliability of power supply and guaranteeing personal safety and the safety of electrical equipment.

A simulator obtains muscle activities and joint contact forces by a computer simulation according to an operating condition for moving a support base of a passive exercise machine. A condition limiting unit finds intermediate conditions corresponding to desirable muscle activities and joint contact forces from muscle activities and joint contact forces obtained with the simulator according to different operating conditions. A motion simulator moves the support base according to the intermediate conditions. A myoelectric measurement device measures myoelectric potential of a subject supported by the support base. An evaluation device selects an operating condition corresponding to a larger muscle activity quantity from measurement results of muscle activity to define it as an operating condition of the passive exercise machine.

The invention discloses a diesel engine connecting rod tooth flank grinding machine, comprising a frame, a came rotary mechanism, a mobile mechanism and a clamping mechanism. The inner structure grinds the diesel engine collecting rod tooth flank, which can make the grinding movement quite stable without any reversing impaction. The connecting rod tooth flank can gain good grinding quality and ensure that the joint contact area of the connecting rod cap and the connecting rod body tooth flank achieves the design requirements. The working efficiency of the diesel engine connecting rod tooth flank grinding machine is quite high. The diesel engine connecting rod tooth flank grinding machine can be broadly applied in the diesel engine connecting rod manufacturing industries of ship, railway, plant, military equipment and so on, which can lift the technical level of diesel engine manufacturing industy in China.

A coaxial connector including a first element, two metal joints, a first metal shell, a second metal shell, an elastic fixing member, and a pair of metal fixings. The first element includes a circuit substrate, a signal input terminal, a signal output terminal, and a grounding terminal and is sandwiched between the pair of the metal fixings. The elastic fixing member embraces the pair of the metal fixings. One end of each of the two metal joints contacts with the signal input terminal and the signal output terminal of the first element, respectively, and the other end thereof contacts with a signal terminal of the first metal shell and the second metal shell, respectively. The pair of the metal fixings each contacts with the inner conductor of the first metal shell and the second metal shell. The coaxial connector is applicable to different thicknesses of substrates, and is easy to assemble and disassemble.

The invention belongs to the leakage-proof field of a pipeline interface, in particular to a leakage-proof device and an installation method of a construction pipeline interface; aiming at the problemthat the existing leakage-proof device needs to be fixed by using a plurality of bolts or a welding method when being installed, which is troublesome and cannot meet the using needs of users, and nowthe following scheme is proposed; the leakage-proof device comprises two pipelines; one sides, close to each other, of the two pipelines are fixedly installed at one ends of joints; the other ends ofthe two joints contact with each other; the outer sides of the two pipelines are provided with the same connecting base; a connecting hole is formed in the connecting base; the two joints are locatedin the connecting hole; the outer sides of the two joints are fixedly sleeved with sealing rings, the two sealing rings are sealed and matched with the connecting hole; and the outer side of the twopipelines are fixedly sleeved with annular plates. The leakage-proof device provided by the invention is convenient for installation and fixation, saves installation time and energy, meanwhile, the device has an early warning function; and when occurring leakage, the leakage is convenient to process in time so as to avoid unnecessary loss.

An electrical connector assembly (1) includes a first connector (2) and a second connector (3). The first connector includes a first housing (21) and first electrical contacts (22). The second connector includes a second housing (31) and second electrical contacts (32). The first contacts include signal contacts (22A), ground contacts (22B), and shield-joint contacts (22C). The signal contacts are arranged in pairs, with each pair transmitting one set of differential signals. The signal contacts within each pair are separated by an empty passage (214). Adjacent pairs of signal contacts are separated by one ground contact or by one shield-joint contact. The second contacts are configured to correspond to the first contacts, so that the first and second contacts can electrically mate with each other to electrically interconnect the first and second connectors. The wide interval between adjacent signal contacts enables cross talk between adjacent signal contacts to be reduced.

The invention relates to an integrated 3D (three-dimensional) printer extruding nozzle belonging to the technical field of 3D printing. The integrated 3D printer extruding nozzle is provided with a printed circuit board, wherein a heating module outgoing wire is arranged at the top end of a fixed bracket, the printed circuit board supports against the top end of the fixed bracket, a compression joint contact of a heating module control circuit is in contact and in circuit connection with the heating module outgoing wire, therefore, the length of the heating module outgoing wire can be effectively shortened, and the outgoing wire is positioned inside the extruding nozzle, thus the problems of bending, abrading, open circuit, even short circuit and the like possibly caused in the outgoing wire in a process of moving the extruding nozzle are provided; furthermore, a temperature measuring signal amplifying circuit is arranged in the printed circuit board, thus signal attenuation is reduced, the accuracy of measuring and controlling temperature of an extruded silk material is ensured, and the precision of 3D printing is ensured. Meanwhile, the integrated 3D printer extruding nozzle provided by the invention is simple in structure, low in use and maintenance cost and wide in application range.

The invention provides a quaternary system rotation rope coring device for balancing wave heave, which relates to the technical field of drilling. The quaternary system rotation rope coring device includes an outer pipe assembly, an inner pipe assembly arranged in the outer pipe assembly and a seat ring arranged on the inner wall of the outer pipe assembly. The inner pipe assembly includes a hanging mechanism, a wave heave balancing mechanism, an adjustment single action mechanism and a rock core pipe, which are successively connected from top to bottom; the wave heave balancing mechanism includes an alarm plug short connection piece, a hydraulic cylinder and a stopper, a piston assembly, a hollow piston rod and a water division joint, wherein the alarm plug short connection piece, the hydraulic cylinder and the stopper are successively connected from top to bottom, and the piston assembly, the hollow piston rod and the water division joint are successively connected from top to bottom; when the piston assembly reaches an upper extreme position, the water division joint contacts the stopper, and a plug body stretches into a slide valve water inlet channel; and when the piston assembly reaches a lower extreme position, the piston assembly contacts the stopper. The quaternary system rotation rope coring device can be applied to a drilling coring process, when the outer pipe assembly heaves with a ship, a tool bit tightly compresses a hole bottom all the time, and the situation that the rock core pipe heaves with the outer pipe assembly can be effectively avoided.

The invention discloses a resistive sensor array fast readout circuit based on a two-wire system isopotential method, and belongs to the sensor technology field. By aiming at an M*N two-dimensional resistive sensor array sharing row lines and column lines, the fast readout circuit comprises a column multiplexer; a reference voltage source; M current feedback operational amplifiers and M testing current sample resistors, which are respectively corresponding to M row lines of the resistive sensor array; N column line driving operational amplifiers, which are respectively corresponding to N column lines of the resistive sensor array; and connecting wires. Each row line and each column line of the resistive sensor array are respectively provided with two connecting wires. The invention also discloses a readout method of the above mentioned fast readout circuit and a sensing system. Compared to the prior art, by adopting the two-wire system isopotential method as the key technology, the measurement errors generated by the connecting cable lead resistance, the cable joint contact resistance, and multi-way switch channel conduction resistance can be effectively eliminated, and therefore the measurement accuracy of the resistive sensor array can be greatly improved.

The invention discloses a circuit breaker with the ability of quick reaction and separation and a quick reaction and separation method for a circuit breaker. The circuit breaker comprises a broken circuit contact group and a joint contact group; the broken circuit contact group comprises a movable broken circuit contact; the joint contact group comprises a movable joint contact; and a movable contact limiting device used for limiting position moving of the broken circuit contact and / or the joint contact is arranged between the broken circuit contact group and the joint contact group. The quick reaction and separation method for the circuit breaker comprises a broken circuit opening step: the broken circuit contact, earlier than the joint contact, reversely moves and is separated independently, or the broken contact and the joint contact reversely move and are separated at the same time. The broken contact is adopted for replacing a fixed contact in the traditional technology, in the case when the broken circuit needs opening and breaking, quick separation between the contacts is realized due to two-way separation action between the broken circuit contact and the joint contact, the electric arc phenomenon can be avoided or reduced, the service life of the circuit breaker is prolonged, and the method can be widely applied to various circuit breaker.

The invention provides a garden tool with a plurality of lithium battery boxes. A mower with two lithium battery boxes is produced according to market requirements. While a power source is enlarged, balance weight is added to the front portion of the mower. An internal connecting structure of each lithium battery box is characterized in that twenty internally-mounted lithium batteries have no large-current wires liable to heating therebetween, and multiple connecting plates including six lithium battery anode connecting plates and seventh-eleventh lithium battery cathode connecting plates are connected with a lithium battery socket on the outside of the lithium batteries, so that durable and reliable lithium battery boxes with orderly arrangement are formed. Press joint contacts of the internal connecting structure of each lithium battery box are provided with grooves; each groove is characterized in that one straight groove connects two symmetrical arc-shaped grooves to form two protrusions and each of the two protrusions is provided with two through holes, and thus a press joint contact is formed; the material for the connecting plates is elastic plates subjected to normalizing heat treatment or titanium memory alloy; the overhead view projection of a connecting shaft of two front wheels of the front portion of the mower is provided with at least one lithium battery box.

The invention discloses a resistive sensor array test circuit based on two-wire system voltage feedback, and belongs to the technical field of a sensor. The circuit is applied to an M*N two-dimensional resistive sensor array sharing row wires and column wires. The test circuit comprises a voltage feedback operation amplifier, a row multipath selector, a column multipath selector, a sampling resistor, a reference voltage source, N column wire driving operation amplifiers in one-to-one correspondence with N column wires of the resistive sensor array, and two connecting wires respectively arranged for each row wire and each column wire of the resistive sensor array. The invention also discloses a test method of the test circuit, and a sensing system. Compared to the prior art, a two-wire system voltage feedback method is taken as a key technology, measurement errors caused by connection with a cable lead wire resistor, a cable joint contact resistor and a multipath switch channel conduction resistor can be effectively eliminated, and the measurement precision of the resistive sensor array is substantially improved.

A rotor assembly is provided in which a solid rotor ring is formed at either end of a stack of laminated discs, the solid rotor rings yielding improved electrical and mechanical characteristics in a low weight assembly. The solid rotor rings are fabricated by brazing slugs between the end portions of the rotor bars, the braze joints contacting a large percentage (at least 90%) of the rotor bar end portions.

The invention discloses a low temperature superconducting magnet joint lap joint soldering technology which comprises the steps of single joint copper surface tin-plating and double joint lap joint soldering. Compared with a traditional joint lap method, the technology provided by the invention has the advantages that through single joint copper surface tin-plating, a tin material can completely infiltrate and cover the copper surface of a joint, and oxide and impurities in the tin material can be easily removed; when double joint lap joint soldering is carried out, new solder and flux are not added, and flux and oxide residues on the joint contact surface are prevented; double joint lap joint uses automatic pressurization and heating equipment, which realizes precise control of heating and pressing rate of a lap joint process; and the technology has the advantages of high field operability, high joint reliability, low contact resistance and high contact strength.

The invention particularly relates to a switch and is used to improve the structure at the contact part used for turning on and off in a switch to reduce current in each contact point and total contact resistance. The problem of poor contact at the pin joint position of a pin joint contact rod and a supporting part in the conventional switch is solved by arranging an additional elastic metal plate on the pin joint contact rod. Due to the contact part arranged on a rotary contact device at the position of a forward / reverse conversion mechanism, the total contact area is increased, current in each contact point is further reduced, and the total contact resistance and heat generation between the rotary contact device at the position of the forward / reverse conversion mechanism and an internal input and an external output are reduced.

The invention comprises a pneumatic tool, a leakproof piston, a male joint and a bolt. At the bottom port of the pneumatic tool is disposed an internal screw hole. At the bottom of the pneumatic tool is disposed a spring-holding hole, in which is held an elastic element. One end of the leakproof piston contacts with an elastic element and the other end is connected with the male joint. One spherical end of the male joint contacts with the leakproof piston and the other end passes through the bolt. The bolt is fixed in the internal screw hole at the bottom port of the pneumatic tool.

The invention relates to a 3D force sensor of a keen joint prosthesis pad and a contact stress measuring method of the sensor, and belongs to the technical field of medical apparatuses. The 3D force sensor can be applied to a femoro-tibia articulation, and comprises an intermediate flexible elastic layer, an upper hard layer and a lower hard layer, the intermediate flexible elastic layer comprisesupper and lower curved surfaces, and the upper or lower curved surface is provided with induction components; the shape of the upper hardness layer is adapted to that of the upper curved surface, andthe upper hardness layer is fit to the upper curved surface; and the shape of the lower hardness layer is adapted to that of the lower curved surface, and the lower hardness layer is fit to the lowercurved surface. The size, direction and position of a contact resultant force in the femoro-tibia articulation can be calculated via certain algorithm, measured values are more accurate, 3D resultantforce of the joint contact stress can be calculated, stress distribution approaching the practicality can be obtained, and quantitative guidance is provided for determining articulation force distribution condition and soft tissue balance link.

The invention relates to the technical field of a circuit opening and closing control component in a basic electric element, and particularly relates to a water repellent type safe electricity-free socket. The water repellent type safe electricity-free socket comprises one or more than one base capable of being inserted by a circuit connection wire; a socket contact is connected with a conduction sheet; and the conduction sheet is connected with a power supply joint contact and a plug. The water repellent type safe electricity-free socket is characterized in that the top of the socket contact is in a triangular structure; arc inclination is arranged at an inclined edge of the triangular structure, so that the plug is beneficial to being inserted; a double-clamping-sheet structure is arranged at the lower part of the socket; the front half part of the plug is clamped by double clamping sheets of the socket part; the back half part of the plug supports the triangular socket contact at the top of the socket; a safe leakage hole is arranged at the bottom of the socket; a conduction sheet is arranged at the outer side of the socket contact at an equal distance in parallel; the upper part of the upper part of the power supply joint contact is connected with the socket contact through a point block metal contact; the power supply joint contact is arranged at the outer side of the conduction sheet at an equal distance in parallel; and the upper part of the power supply joint contact is connected with the conduction sheet through two metal contacts. With the adoption of the water repellent type safe electricity-free socket provided by the invention, the internal structure of the socket device is optimized; and the water repellent type safe electricity-free socket can be used for preventing electric shock, and is safe and reliable.

The invention discloses a live test method of line cable joint contact resistance, and solves the problem that measurement and analysis cannot be performed due to overhigh temperature of a cable joint in the running state. The live test method is characterized in that an online voltage collecting terminal or an online current collecting terminal is provided for sampling a tested object, namely, a cable joint, sampled data are wirelessly transmitted to a wireless handheld receiving terminal, and the wireless handheld receiving terminal processes, stores and displays the data. The invention further provides specific structures of the online voltage collecting terminal or the online current collecting terminal and the wireless handheld receiving terminal. Measurement can be performed in a live state, and loss caused by power failure is avoided; dynamic resistance can be accurately measured, and analysis of the actual condition of the cable joint contact resistance is facilitated; and the testing data are direct data, and the test result is accurate.

Traditional technique has the feaures of good fill effect and high integrity. But, the technique also has the disavantages of complex procedures, expensive cost and low production efficiency. The outstanding disavantage is that multiple steps are needed in the method for depositing titanium and titanium nitride as well as for depositing tungsten in chemical vapor deposition. The invented modified technological flow deposits tungsten and its compound as a diffusion barrier layer by using physical vapour phase process. Than, tungsten hexafluoride is hydrogen reducted to fill the opposite joint contact hole and opposite joint hole so as to simplify the flow, increase productivity and security, lowers cost.

The invention discloses a contactor driven by capacitive stored energy. The contactor comprises at least one joint contact, a joint electromagnet, an electromagnet drive circuit and an open circuit energy storage capacitor. The open circuit energy storage capacitor is connected to the contactor, so that the contactor can still drive the open circuit electromagnet to enable the joint contacts to reset in an opened state under the condition of no power supply, action is rapid and reliable, using potential safety hazard of the contactor is effectively reduced, and the contactor and the relevant circuits are protected; in addition, through design of a starting button and a break button, the contactor can be switched on and off in an automatic, semi-automatic and manual mode, various flexible control modes are achieved and enriched, and the contactor is safer and more reliable. The contactor can be widely applied to the field of various contactors.