30results about How to "Preload" patented technology

The invention discloses a high-performance bonded rare earth magnetostrictive material and a preparation method thereof. The high-performance bonded rare earth magnetostrictive material comprises the following raw materials, in parts by weight:3-5 parts of metal terbium, 5-10 parts of metal dysprosium, 15-20 parts of metal iron, 10-15 parts of binders, 30-40 parts of acetone solution, 10-15 parts of curing agents and 10-15 parts of coupling agents. The method is characterized by blending the metal terbium, the metal dysprosium and the metal iron according to a ratio of 3:7:19 in molar mass, and placing the mixture in a vacuum non-consumable arc furnace for argon-filling melting to obtain an alloy ingot; then, under the protection of gasoline, smashing the alloy ingot through an ingot disc to obtain powder particles having required particle sizes; then, mixing the obtained powder particles with the binders, then, placing the mixture into the acetone solution, stirring the solution and meanwhile, heating the solution with an infrared lamp until the materials are uniformly blended and acetone is volatilized completely; after cooling, adding the curing agents, and after carrying out full stirring and uniform blending, keeping the obtained mixture in a certain intensity of magnetic field for a period of time; and then, carrying out compression moulding through a hydraulic press, and finally, carrying out curing processing. The tensile strength of the obtained material is enhanced, and the production cost is low.

The invention discloses a convenient-to-disassemble hoop of a pier stud for bent cap molding, wherein the hoop comprises a first hoop and a second hoop which are mounted on the pier stud for bent cap molding; under the arrangement of a mounting seat, a spring and a locking bolt, when the hoop is assembled, a certain pre-tightening force exists between the first hoop and the second hoop, the coaxiality of a third threaded hole and a first threaded hole is higher, and rapid locking of the locking bolt is facilitated; when the hoop is dismounted, the ejection separation force of the hoop is gradually reduced through multiple times of buffering, the rebound force of the hoop is reduced step by step, and the situation that the hoop rebounds at a high speed to impact a constructor or a moving platform due to overlarge elasticity is avoided; and particularly, when the last locking bolt is dismounted, the spring can also play a certain pre-tightening force, so that the hoop cannot be separated from the pier stud instantly, the hoop is prevented from sliding down instantly, the hoop is convenient for the constructor to assemble and disassemble, and a plurality of springs correspond to the ejection separation force of the hoop, and thus the self deformation of the hoop is reduced, and the hoop is easier to repair and reuse after being detached.

The invention provides a high-temperature and high-pressure sluice valve which comprises a valve body, a valve seat, a wedge disc, a valve deck and a valve rod. The valve rod is rotationally arranged on the valve deck, and the lower portion of the valve rod is in threaded connection with the wedge disc. A first sealing assembly in sealing connection with the valve rod is arranged in a lower opening of the valve deck, and a second sealing assembly in sealing connection with the valve rod is arranged in an upper opening of the valve deck. The valve rod is rotationally supported in the valve deck through a bearing arranged above the second sealing assembly. According to the high-temperature and high-pressure sluice valve, the structure of the double sealing assemblies is adopted; by means of buffering of the first sealing assembly, the impact of working media on the second sealing assembly is greatly lowered, and therefore the sealing function can be effectively achieved through the second sealing assembly; and furthermore, the service life of the second sealing assembly is prolonged, and the working pressure value of the valve is increased.

The invention discloses a lighting console being convenient for lighting, comprising a lighting console body, a lighting device, a mounting base and a connecting device, wherein the connecting device is arranged on a display screen side plate of the lighting console body, the mounting base is connected with the connecting device, the lighting device is installed on the mounting base, additional lighting is provided for an operator by the way that additional lighting equipment is arranged outside the lighting console, when intensity of illumination light in a control room is insufficient, the operator can see each button on the lighting console, so as to avoid that the operator inputs a wrong instruction and control error is caused further, thus use of the lighting console and the control effect to stage lighting are guaranteed.

The invention discloses a corrugated board forming and pressing auxiliary device which comprises a paperboard cutting machine body and a conveyor, and a concave road section is arranged on a conveying channel of the conveyor; a buffer plate is rotationally arranged in the concave road section of the conveyor; when the conveyor conveys the overlapped corrugated boards, the reciprocating mechanism is driven by the driving mechanism so that the buffer plate can form an angle of 20-30 degrees based on the plane of the conveying channel. According to the corrugated board forming and pressing auxiliary device provided by the invention, the buffer plate ascends to be in contact with a corrugated board conveyed to a conveyor from a cutting machine body, so that the corrugated board is pre-loaded, and the corrugated board does not directly fall on a conveying belt of the conveyor under the action of inertia; the height of one end of the paperboard falling onto the plane of the conveying belt is reduced, then the jolting amplitude caused by direct contact of the paperboard and the conveying belt is reduced, and separation of the contact ends of the two overlapped corrugated paperboards under the jolting condition is weakened and even avoided.

The invention relates to the technical field of circuits, in particular to a circuit protection structure of a power management chip and a working method thereof, including a circuit board, a push switch body mounted on the circuit board, and a mounting device for easy assembly provided on the circuit board The circuit board is provided with a rebound component that assists the rebound of the push switch body, the circuit board is provided with a heat dissipation component that dissipates heat from the circuit board, and the heat dissipation component is provided with a preload for the mounting component. The purpose of the present invention is to provide a circuit protection structure for a power management chip, which can flexibly adjust the angle of the circuit board, avoid the circuit board from being unable to be assembled with the casing due to the angle of the circuit board, and at the same time can help the push switch body. Rebound after pressing, avoid pressing the switch body for a long time, and the rebound performance will deteriorate and cannot fully rebound. In addition, the circuit board can be dissipated to avoid a large amount of heat generated by the circuit board, which will affect the normal operation of the circuit board.

The invention discloses a connecting mechanism and a mounting method for connecting a closestool cover plate and a closestool base. The connecting mechanism comprises a supporting base and a bolt, a protruding edge is arranged on the top of the bolt, a supporting shaft is arranged on the top surface of the supporting base, a receding hole is concavely formed in the top surface of the supporting base, and a limiting column is arranged on the top surface of the supporting base. The connecting mechanism further comprises a movable piece and an adjusting sleeve, internal threads are arranged on the inner circumferential surface of the adjusting sleeve, external threads are arranged on the outer circumferential surface of the movable piece, the external threads and the internal threads are connected in a screwed mode, a penetrating hole, a receding hole and a locking hole are formed in the movable piece, the supporting shaft penetrates through the penetrating hole, and the limiting column is inserted into the limiting hole. The bolt penetrates through the locking hole and the receding hole to be connected with the closestool base so as to enable the supporting base to rotate in the circumferential direction, next, the adjusting sleeve is rotated to make the movable piece move upward to be pressed against the protruding edge, and thus the supporting base can be stopped from rotating in the circumferential direction. The movable piece is made to be pressed against the bolt by rotating the adjusting sleeve, the pre-tightening function is played, and the mounting operation can be carried out conveniently and fast.

A connecting device of automobile clutch pull wires belongs to a control device of automobile clutch pull wires, in particular relating to the arrangement and the installation of a control mechanism of a vehicle driving component. The connecting device comprises a pull wire and a pull rod, which is characterized in that an inner blind hole is arranged on a opposite surface of the pull rod and theclutch, a transverse ring-shaped groove is arranged in the hole, the pull wire is fixed on a pull wire ball head, the pull ball head penetrates a preloading spring, a pull wire sliding ring is arranged in the inner blind hole, and a clamp spring is clamped in the ring-shaped groove to push against the pull wire sliding ring. The connecting device of automobile clutch pull wires has the advantagesof novel, compact and reasonable structure. When the clutch works, the pull wire and the pull rod have preloading action, the pull wire naturally preloads and comes to the position, the angle of the pull wire and the automobile clutch can be adjusted in real time with flexible actions, the connecting device of automobile clutch pull wires is accurate and reliable, increases the driving efficiency,and can reduce the bending break loss of the pull wire.

The invention relates to a luminaire with a limit pre-pressing structure, comprising a luminaire body, a fixed screw, an elastic anti-vibration pad and a stop collar; wherein the fixed screw is connected with the luminaire body and penetrates through the elastic anti-vibration pad; the stop collar is provided with a screwed hole matched with the fixed screw and a stop end face located at the tailend of the screwed hole; the stop collar is sleeved on the fixed screw and enables the elastic anti-vibration pad to be equipped with pre-pressing deformation; when pre-pressing deflection of the elastic anti-vibration pad reaches the preset value, the end face of the fixed screw is pressed against the stop end face. The luminaire of the invention is provided with a limit pre-pressing structure, so that when the luminaire is installed, appropriate compression deformation of the elastic anti-vibration pad can be ensured; meanwhile, pre-pressing can be carried out on the stop collar to prevent the stop collar from loosening in the process of use.

The invention relates to a luminaire with a limit pre-pressing structure, comprising a luminaire body, a fixed screw, an elastic anti-vibration pad and a stop collar; wherein the fixed screw is connected with the luminaire body and penetrates through the elastic anti-vibration pad; the stop collar is provided with a screwed hole matched with the fixed screw and a stop end face located at the tail end of the screwed hole; the stop collar is sleeved on the fixed screw and enables the elastic anti-vibration pad to be equipped with pre-pressing deformation; when pre-pressing deflection of the elastic anti-vibration pad reaches the preset value, the end face of the fixed screw is pressed against the stop end face. The luminaire of the invention is provided with a limit pre-pressing structure, so that when the luminaire is installed, appropriate compression deformation of the elastic anti-vibration pad can be ensured; meanwhile, pre-pressing can be carried out on the stop collar to prevent the stop collar from loosening in the process of use.

The invention discloses an elevator steel belt damage dynamic quantitative evaluation device and method, the device comprises a guide wheel assembly, a guide wheel keeps moving synchronously with a steel belt, and the position of a detection device is kept unchanged; the machine vision damage detection module is used for quickly acquiring a steel strip surface picture; the eddy current thermal imaging detection module comprises an induction heating coil surrounding the steel belt, two front infrared thermal imagers arranged at the front end of the induction heating coil and two rear infrared thermal imagers arranged at the rear end of the induction heating coil, the front infrared thermal imagers shoot the unheated steel belt, and the rear infrared thermal imagers shoot the unheated steel belt; the rear infrared thermal imager is used for shooting the heated steel belt; the position detection module is used for detecting the movement position information of the steel belt; and the alarm module is used for graded alarm. According to the dynamic detection device and the quantitative evaluation method for the elevator steel belt damage, dynamic damage detection and quantitative evaluation of the damage degree can be carried out on a polyurethane coating layer on the surface of the steel belt and a steel wire rope in the steel belt, and the elevator health condition is monitored.

The invention discloses a contactor, which includes a body case, a contact support, a coil frame, a base and a cover; the contact support is movably installed in the body case, the coil frame is placed in the base and inserted into the body case, and the body case is installed on the base; The one-piece cover with IP2X protection is installed on the body. The invention has a simple structure and is suitable for automatic assembly; the protection level is high; and the wiring is firm and stable.

The present invention relates to a new bucket wheel mixing reclaimer trolley driving steel wire rope balancing method and its device, including a driving system, a steel wire rope, a reversing support wheel, a balancing drum I, and a balancing drum II. The driving system consists of a motor, a coupling Shaft device, brake, reducer, gear pair and drive drum are fixed at one end of the bridge girder, and the steering wheel is scattered and fixed on the bridge girder. The trolley walks along the bridge girder, and the balance drum I and the balance drum II are fixed. At both ends of the trolley, the rear end of the trolley is connected to the drive drum by a steel wire rope through the balance drum I, and then connected to the balance drum II at the front end of the trolley through the diverted support rollers around the other end of the bridge girder. The invention can reasonably improve the balanced stress of the steel wire rope driven by the trolley, so that the trolley can be free from unbalanced loads, run smoothly, improve the safety and stability of the equipment, reduce the maintenance cost and prolong the service life of the equipment.

The invention discloses a conductive plate structure of a coil terminal, which is composed of a contact part and a mounting part integrally formed, and a first terminal and a second terminal are formed at intervals in the mounting part, the height of the first terminal is smaller than the height of the second terminal; The terminal is adjacent to the contact portion. The invention is suitable for automatic assembly, the wiring is firm and stable, and the stamping preparation saves materials.

The invention dislcoses a escalator glass support unit comprising a pedestal (1) fixed at two sides of a step. A trapezoid-shaped groove (2) with a narrow upper part and a wide lower part is formed in the middle of the pedestal. A threaded hole (3) is formed in the bottom of the pedestal (1); a clamping block (4) is arranged above the threaded hole (3); a clamping groove (5) is formed in the middle of the clamping block (4); a clamping surface (6) matching the surface of the trapezoid-shaped groove (2) is arranged above the clamping block (4); and a piece of glass (7) is arranged inside the clamping groove (5). A threaded rod (8) is arranged in the threaded hole (3); and the top surface of the threaded rod (8) supports the bottom surface of the clamping block (4). According to the invention, the support unit has advantages of firm support and simple and convenient assembling; and a problem that the glass is easy to crack can be solved.

The invention provides an assembly and positioning mechanism of a vacuum cleaner for a bed. The vacuum cleaner for a bed includes a base, an upper cover and a driving motor. The outer cover of the driving motor is provided with a motor cover, and the base, the motor cover and the upper cover are detachably connected and fixed; The positioning mechanism includes a shock-absorbing component arranged at the junction of the motor cover, the base, and the upper cover, and a positioning rod arranged on the opposite side of the base and the upper cover. The part passes through the connecting edge and is inserted into another positioning rod for limiting, and the shock-absorbing component is compressed between the two positioning rods arranged oppositely. By setting the shock-absorbing components at the connection to support the motor cover, the fixed part is in the form of a soft connection, which reduces the vibration of the driving motor during operation, effectively reduces the noise during use, and brings a good user experience. By setting the positioning rod to be used in conjunction with the shock-absorbing component, the bed vacuum cleaner can be quickly assembled in place, and the positioning accuracy and installation efficiency are improved.

The invention provides a novel electrode structure for a resistance furnace. The novel electrode structure for the resistance furnace comprises an electrode base and an electrode arranged in a center hole of the electrode base. An O-shaped ring used for sealing is arranged outside the electrode. A screwing nut is arranged at the bottom of the electrode. Insulating material is arranged between the electrode and the electrode base. The electrode structure can meet requirements for high-temperature and high-pressure sealing in equipment, can be adjusted in size and can adapt to different current and voltage requirements. The electrode structure is compact in structure and convenient to manufacture and install, well solves the problems of electrode structure sealing, insulating, cost and many other respects, and is very suitable for continuous high temperature environments of the resistance furnace.