138 results about "Magnetic spring" patented technology

The utility model discloses a vertical driving device applied to a high-precision instrument, and relates to the field of gravity balance. The vertical driving device comprises the external fixing bracket, a rotor connecting plate, a first group of slide rail components, a second group of slide rail components, an external fixing bracket extension part, a vertical voice coil motor, a vertical magnetic spring component and the like, wherein the vertical magnetic spring component comprises a magnetic stator and a magnetic rotor. The vertical magnetic spring assembly outputs constant force in the stroke, and timely response of a high-precision instrument can be achieved. Through calculation, the vertical magnetic spring assembly, the vertical voice coil motor and the mass center of the high-precision instrument are arranged to be located on the same axis, additional torque can be avoided, the motion precision of the high-precision instrument is improved, and power balance can be ideally achieved. Meanwhile, under the condition that a power supply is cut off, the vertical magnetic spring assembly provides constant force output for a long time in the stroke, so that accidents such as rapid falling of a high-precision instrument are avoided.

The utility model discloses a sliding folding table for a ship, which belongs to the technical field of folding tables, and comprises a slideway arranged on the side wall of a ship body, the slideway is connected with a sliding block in a sliding manner, the sliding block is connected with a sliding frame, and the bottom of the sliding frame is hinged with a table plate; a magnetic spring lock is arranged between the table plate and the sliding frame and is used for folding and storing the table plate; a buffering supporting assembly is arranged between the table board and the sliding frame and used for achieving downward overturning of the table board. The folding chair can slide and adjust the use position, can be folded, is convenient to store, and can meet multiple requirements of users.

The feed processing equipment with the automatic feeding and batching function comprises a processing tank and a base, the top wall of the base is fixedly connected with a plurality of inverted-L-shaped frames, one ends of the inverted-L-shaped frames are jointly and fixedly connected with a connecting block, and the connecting block penetrates through the top wall of the processing tank and then is fixedly connected with a rack; a plurality of supporting plates are installed on the inner side wall of the processing tank, supporting rods are arranged on the side walls of the supporting plates, driven gears are fixedly connected to the side walls of the supporting rods, first rods are fixedly connected to one ends of the supporting rods, second rods are rotatably connected to the other ends of the first rods, and box bodies are slidably connected to the side walls of the supporting plates. And the second rod is rotationally connected with the side wall of the box body. By arranging the processing tank, a plurality of springs, a box body and other structures, when feeding and batching are needed, a motor is started and a magnetic spring is electrified, so that the box body, a first spring and a sliding plug firstly drive a limiting plate to slide, and a feeding hole formed in the limiting plate is correspondingly communicated with the inner wall of a feeding pipe for feeding.

The invention relates to a large-negative-stiffness magnetic spring device for heavy-load low-frequency vibration suppression. The large-negative-stiffness magnetic spring device comprises an inner magnetic ring pile structure and an outer magnetic ring pile. The inner magnetic ring pile structure can reciprocate in the hollow part of the outer magnetic ring pile; the inner magnetic ring pile structure comprises an upper magnetic ring pile and a lower magnetic ring pile; the upper magnetic ring pile and the lower magnetic ring pile respectively comprise a plurality of inner magnetic rings which are coaxially arranged; the outer magnetic ring pile comprises a plurality of outer magnetic rings which are coaxially arranged; in the axial direction of the inner magnetic ring pile structure, the inner magnetic ring pile structure is provided with a first symmetry plane, and the magnetization directions of the inner magnetic rings of the upper magnetic ring pile and the lower magnetic ring pile are symmetrical about the first symmetry plane; in the axial direction of the outer magnetic ring pile, the outer magnetic ring pile is provided with a second symmetry plane, and the magnetization direction of outer magnetic rings in the outer magnetic ring pile is symmetrical about the second symmetry plane; when the first symmetry plane and the second symmetry plane coincide, the resultant magnetic force between the inner magnetic ring pile structure and the outer magnetic ring pile structure is zero, and the maximum negative stiffness is generated. According to the scheme, the low-frequency vibration is effectively suppressed.

This specification describes a transducer configured to convert electrical signals into vibrational movement. The transducer comprises an axially-magnetised reciprocating magnet, wherein the axially-magnetised reciprocating magnet comprises an aperture such that the reciprocating magnet has an inner boundary and an outer boundary.The transducer further comprises at least two pairs of concentrically positioned electromagnetic solenoids, the at least two pairs of concentrically positioned electromagnetic solenoids being configured to drive the reciprocating magnet to reciprocate in a volume above and below the reciprocating magnet. The first solenoid of each of the pairs of concentrically positioned electromagnetic solenoids is positioned to influence the reciprocating magnet at the inner boundary more than at the outer boundary, and a second solenoid of each of the pairs of concentrically positioned electromagnetic solenoids is positioned to influence the reciprocating magnet at the outer boundary more than at the inner boundary. The reciprocating magnet is suspended in the mid-point of its axial travel at a null position using either mechanical springs or magnetic springs.

The invention provides an external magnetic drive magnetic pole turnover type sampling capsule which comprises a shell, a rotary magnet, an axial magnet, a rocker and a fixed magnet, the shell is provided with a rotary magnet mounting cavity, a sampling cavity and a fixed magnet mounting cavity, the rotary magnet is arranged in the rotary magnet mounting cavity, and the axial magnet is arranged in the fixed magnet mounting cavity. The fixed magnet is arranged between the fixed magnet mounting cavities, and the rocker is arranged in the sampling cavity. The external magnetic drive magnetic pole overturning type sampling capsule has the beneficial effects that the sampling structure can be activated only by controlling the magnetic pole overturning of the rotating magnet through an external magnetic field, and the operation is much simpler than the operation of directly overcoming the repulsive force between internal magnets; the purpose of opening the sampling port is achieved by changing magnetic field distribution between the rotary magnet and the fixed magnet, compared with a traditional magnetic spring structure, the capsule space occupied by the movable end magnet is avoided, and the sample space proportion is greatly increased.

The utility model provides a magnetorheological damper with variable rigidity and variable damping. The magnetorheological damper mainly comprises a piston rod, a piston head, a spring, a magnetic spring floating piston, a magnet exciting coil and the like. Under the action of a magnetic field, an annular flow channel in the piston head generates a magnetorheological effect, the shear yield stress of magnetorheological fluid is increased, damping force is generated, the magnetic spring floating piston is used for compensating volume change, resistance is provided through the permanent magnets connected with the magnetic spring floating piston, and magnet exciting coils on the outer sides of the permanent magnets at the upper and lower positions can be used for enhancing or weakening the magnetic field. Different repulsive forces are provided for the permanent magnet connected to the magnetic spring floating piston, and the required force is changed under the condition that the displacement of the piston head is the same, so that the rigidity of the magnetorheological damper is changed; effective control over damping and rigidity can be achieved by changing the current magnitude of the corresponding magnet exciting coil.

The present invention provides a device and method for energy storage tripping of a circuit breaker, comprising an electromagnetic coil, a striker, a movable iron core, a stationary iron core, a magnetic spring, and a tripping connecting rod. The device is characterized in that it comprises: at least one energy storage module, a selection switch, and a control circuit, wherein the energy storage module is connected to the electromagnetic coil via the selection switch; when power is on, the energy storage module is charged, and the control circuit controls the selection switch to disconnect the energy storage module from the electromagnetic coil; after power is off, the control circuit controls the selection switch to connect the circuit of the energy storage module and the electromagnetic coil, the energy storage module discharges, thereby enhancing the electromagnetic field force in the electromagnetic coil, and the electromagnetic field force drives the movable iron core to overcome the elastic force of the magnetic spring and move toward the stationary iron core, thereby driving the striker to move and strike the tripping connecting rod to achieve tripping. The energy storage module of the present invention is connected to the electromagnetic tripping device only when power is off, thereby avoiding erroneous tripping caused by leakage and the like, and having a wider range of applications.

Electrical / electronic installation device, in particular a switch (S) or push button, for installation in a junction box (D), for triggering an action of an actuator connectable to the installation device, in particular a lamp, a blind or the like, wherein the installation device has a function module enabling remote control with a radio transmitter and with an actuation sensor, wherein the installation device comprises a magnetic spring (MF) which is mechanically compressed by actuation of the installation device through the back of a rocker (W) or rocker receptacle (WA) of the installation device, wherein this actuation is detected and evaluated by an actuation sensor designed as a magnetic field sensor (H), and the current switching position of the rocker (W) is also determined, characterized in that the magnetic spring (MF) is designed as a coil spring.

The spray gun comprises a barrel (12) having an angularly arranged handle (14), a barrel liquid supply conduit for guiding liquid from a liquid supply to a discharge orifice of the barrel (12), and a valve stem arranged within the barrel liquid supply conduit for relative movement between open and closed positions of the discharge orifice (21). Comprising a pair of magnets (40A, 40B) disposed outside the liquid supply conduit is effective for biasing the valve stem to the discharge hole closed position in response to the repulsive magnetic force of the magnets, and the trigger (15) is actuatable to move the valve stem against the repulsive magnetic force of the magnet assemblies (40A, 40B) in order to open the discharge hole (21), the opposite magnetic forces of the magnets force the valve stem to a closed position of the discharge hole (21).

According to the technical scheme, the falling type lightning arrester is characterized in that the falling type lightning arrester comprises a supporting column, a lightning arrester body and a conductive pressing plate, the upper end of the supporting column is connected with the upper end of the lightning arrester body through the conductive pressing plate, and the supporting column is provided with a mounting shell, an electromagnetic mechanism, a push-off mechanism and a shifting mechanism; the electromagnetic mechanism comprises an electromagnetic coil, a driving armature and a non-magnetic spring, a mounting base is arranged in the mounting shell, and the driving armature is vertically and slidably connected to the mounting base through the non-magnetic spring; the push-off mechanism comprises a push-off rod and a push-off spring, the push-off rod is horizontally connected into the mounting shell in a sliding mode through the push-off spring, and a limiting block is arranged on the push-off rod; the lightning arrester body is provided with a shifting groove, the shifting mechanism comprises a shifting rod and a shifting torsional spring, the shifting rod is rotationally connected into the mounting shell through the shifting torsional spring, and the falling type lightning arrester can facilitate separation of the lightning arrester body from the conductive pressing plate when a circuit is short-circuited.

The present invention provides a power generation driving device and method based on interior casement windows and interior sunshade curtains in a building, including a sunshade curtain. A reel is provided at the top of the sunshade curtain, and a fixing device is provided at the bottom. A transverse stiffening shaft is arranged in the middle of the sunshade curtain. The transverse stiffening shaft can be used to play a balancing role when the two sides of the sunshade curtain are affected by unbalanced wind forces, leading the deformation area at the edge of the sunshade curtain to the middle. A one-way flexible guide rail is arranged along the length direction of the sunshade curtain between the transverse stiffening shaft and the fixing device. A power generation device is arranged on the side of the reel close to the wall. The power generation device is connected with a generator shaft connecting wire, and one end of the generator shaft connecting wire is slidably arranged on the curved side of the one-way flexible guide rail. A magnetic spring assembly is arranged between the end of the generator shaft connecting wire and the fixing device. The magnetic spring assembly can control the position of one end of the generator shaft connecting wire through magnetic field transformation. This application can satisfy the swinging of the sunshade curtain and can realize the energy conversion during the swinging process of the sunshade curtain.

A circuit breaker including a housing, a line terminal, a load terminal, a trip device, a thermal trip mechanism, a magnetic trip mechanism, an arc extinguish chamber, a handle assembly, a one-piece line terminal lug, and a one-piece load terminal lug. The trip device includes a link assembly and a movable contact assembly. The movable contact assembly includes a movable contact; the thermal trip mechanism includes a bimetallic strip and a thermal trip hook connected to a first end of the bimetallic strip. The magnetic trip mechanism includes a moving iron core, a stationary iron core, a magnetic spring, and a firing pin. The one-piece line terminal lug includes a first bottom part and an inlet connection part and is configured to directly introduce an external power into the circuit breaker. The first bottom part is disposed at the bottom of the line terminal.

The present invention provides an active motion capsule robot with a hybrid drive mode, comprising a head unit and a tail unit movably connected to the head unit, wherein the outer surface of the head unit is provided with a first thread groove, the outer surface of the tail unit is provided with a second thread groove, the head unit is provided with a moving magnet, the tail unit is provided with a rotating magnet, the rotating magnet can rotate relative to the tail unit, the moving magnet and the rotating magnet constitute a magnetic spring mechanism, and an external magnetic field is applied to the magnetic spring mechanism. The active motion capsule robot can realize spiral drive forward or peristaltic drive forward according to the strength of the applied external magnetic field. The beneficial effects of the present invention are as follows: the active motion capsule robot of the present invention has the characteristics of a hybrid drive mode, can realize spiral drive forward and peristaltic drive forward, and when in different parts of the gastrointestinal tract, adopts different drive modes to realize active motion of the hybrid drive mode, thereby improving the forward efficiency of the capsule robot in the gastrointestinal tract.

The utility model discloses a high-performance permanent magnet bistable electromagnetic clutch, which belongs to the field of clutches and comprises a driving end face wheel and a driven end face wheel which are meshed with each other, and a shaft rod end of the driving end face wheel and a shaft rod end of the driven end face wheel are provided with a driving shell and a driven shell which are hermetically connected through a bolt structure. Compared with the prior art, the device has the advantages that the clutch state fixing assembly for limiting the opening and closing states of the clutch is designed to be of a pure physical structure, and the magnetic clamping block is pulled to move horizontally along the plane end of the sliding groove of the L-shaped limiting rod through magnetic force generated by the electromagnet; therefore, the limiting rod at the outer wall end of the movable armature can conduct positioning sliding along the vertical end of the L-shaped limiting rod sliding groove, when the electromagnet loses power, the magnetic clamping block continues to abut against the limiting rod under the action of the non-magnetic spring, and therefore the state of the clutch is fixed.

The utility model relates to an intelligent door and window anti-theft alarm device based on the internet of things, which comprises a magnetic reed type switch, a magnetic plate, a control module, a wireless communication module and an alarm module, the magnetic reed type switch is pre-buried on a door frame main body or a window frame main body, and the magnetic plate is installed on a door main body or a window main body. When the door main body and the door frame main body are closed or the window main body and the window frame main body are closed, the magnetic plate is close to the magnetic reed switch and the magnetic reed switch is closed; the control module is used for being electrically connected with the magnetic reed type switch, the control module is in communication connection with the wireless communication module, and when the door body or the window body is opened abnormally, the magnetic plate is away from the magnetic reed type switch located in the door frame body or the window frame body along with opening of the door body or the window body, so that the electric shock in the magnetic reed type switch is cut off; the control module sends a signal to the wireless communication module and the alarm module after detecting that the electric shock is cut off, the wireless communication module is used for reflecting that someone intrudes into the user, and the alarm module is used for warning the intruder.

The utility model discloses a kind of fixed crystal machine thimble assemblies with gravity balancing device, including thimble piece, voice coil motor and magnetic spring assembly, the voice coil motor is connected and drives the thimble piece vertical reciprocating motion, the voice coil motor includes voice coil motor rotor and voice coil motor stator, the magnetic spring assembly includes magnetic spring, the magnetic spring includes magnetic spring rotor and magnetic spring stator, the voice coil motor stator and the magnetic spring stator are fixed immovably, the voice coil motor rotor indirectly fixed connection the magnetic spring rotor. The beneficial effects of the utility model technical scheme are: in the present scheme, constant magnetic force spring is used, under the condition that load force is constant in guaranteeing motor operation process, due to the supporting effect of magnetic force, so that motor load is reduced, relatively small size motor can be selected, prolong the service life of motor while also reduce the working energy consumption.

The present invention relates to the technical field of electric motors, in particular to a stepping motor. The stepping motor includes a first cover plate, a second cover plate, a stator assembly and a rotor assembly. The stepping motor further includes a first magnetic spring sleeved and fixed on the shaft, the first magnetic spring includes a first magnetic ring in a ring shape and a second magnetic ring. Compared with the prior art, the present invention effectively strengthens the axial restraint of the motor rotor by adding non-contact magnetic springs to the shaft of the rotor. This can eliminate axial displacement. Meanwhile, since there is no physical contact between the non-contact magnetic springs and the shaft, no additional friction will be introduced. The output torque is superior to that of the existing contact-type coil springs or elastic washers, and the running noise of the motor is significantly reduced.

The application belongs to the technical field of IGBT welding and specifically relates to an ultrasonic unit for small-pressure welding and a welding device, wherein the ultrasonic unit comprises a base, a horizontal part and a vertical part; a welding assembly is slidably connected to the vertical part of the base, the welding assembly comprises an ultrasonic triple group configured to weld a workpiece; and a driving assembly is arranged between the horizontal part of the base and the ultrasonic triple group, the driving assembly comprises a driving part and a magnetic spring, the magnetic spring is arranged in parallel with the driving part, the driving part is configured to provide welding pressure for the ultrasonic triple group, and the magnetic spring is configured to balance the gravity of the welding assembly; the application can realize small-pressure welding of the workpiece and avoid direct damage to the surface of the workpiece due to excessive gravity of the welding assembly.

Disclosed are a linear vibration motor structure with a long service life, comprising a lower bracket, wherein a stator assembly is connected above the lower bracket; a vibrator assembly is sheathed outside the stator assembly; a casing is sheathed outside the vibrator assembly; the casing is connected above the lower bracket; the vibrator assembly is connected to the casing and the lower bracket by means of magnetic springs; and each magnetic spring comprises several first magnets and several third magnets. An implementation method for a linear vibration motor structure with a long service life is further disclosed. According to the present invention, the vibrator assembly is connected to the casing and the lower bracket by means of the magnetic springs, and the first magnets and the third magnets repel each other so as to form a magnetic spring with a spring-like effect, by means of which the use of a tangible spring in the motor can be avoided, such that a product will not fail due to the fatigue life and stress concentration of the tangible spring, thereby improving the reliability of the product and making the product have a long service life.

The utility model discloses a wireless tour guide explainer which comprises a voice transmitter and a voice receiver, the voice transmitter is provided with a first main control chip, the voice receiver is provided with a second main control chip, and an electromagnetic coil connected with the first main control chip is arranged in the voice transmitter. A magnetic reed sensor capable of interacting with the electromagnetic coil is arranged in the voice receiver; the magnetic reed sensor is arranged in a switching circuit connected with a second main control chip of the voice receiver, and when the electromagnetic coil is close to the magnetic reed sensor, the magnetic reed sensor triggers the switching circuit and enables the switching circuit to be switched on; when the switching circuit is switched on, a communication signal is sent to the second main control chip of the voice receiver, and when the second main control chip of the voice receiver receives the communication signal, communication matching of the voice receiver is executed. Compared with the prior art, rapid matching of the voice transmitter and the voice receiver can be realized.

A quasi-zero stiffness vibration isolator with a large displacement stroke, the vibration isolator comprises an upper shell, an upper magnetic ring upper cover, an upper cross spring leaf, an upper spring leaf fastener, an outer magnetic ring shell, an outer magnetic ring base, an outer magnetic ring and an outer magnetic ring upper cover, a lower shell, a lower magnetic ring, a lower magnetic ring lower cover, a lower cross spring leaf and a lower spring leaf fastener, an inner magnetic ring base, an inner magnetic ring and an inner magnetic ring upper cover; the upper and lower magnetic rings and the inner and outer magnetic rings constitute a linear negative stiffness magnetic spring with a large displacement stroke; the upper cross spring leaf and the lower cross spring leaf connect the support rod and the shell, provide positive stiffness of the vibration isolator, and are connected in parallel with the negative stiffness magnetic spring to reduce the dynamic stiffness of the inner magnetic ring at the equilibrium position; the cross spring leaf is equipped with a spring leaf fastener to facilitate adjustment of the equilibrium position; the present invention has the advantages of simple structure and large working stroke, can effectively reduce the natural frequency of the vibration isolation system, widen the vibration isolation frequency band, and improve the vibration isolation effect, and is not only suitable for micro-vibration isolation, but also for large-scale vibration isolation.

The present invention discloses a spring compression separation and conveying mechanism, comprising an annular conveying mechanism, a clamping conveying mechanism, a compression plate and a crank. The two compression plates are relatively arranged below the annular conveying mechanism. The crank performs periodic trajectory motion to drive the compression plate to perform circular motion. The two compression plates maintain an unchanged angle. The annular conveying mechanism is provided with a magnetic spring connecting plate. The two compression plates compress and convey the spring to the clamping conveying mechanism. The present invention adopts the annular conveying mechanism and the compression plate to cooperate to separate the spring from the annular conveying mechanism and convey it into the clamping conveying mechanism, thereby ensuring that the spring can be detached from the suction cup and can be compressed to enter the clamping conveying mechanism for output. The present invention also develops a spring conveying method. During the compression and conveying process, the annular conveying mechanism, the clamping conveying mechanism and the compression plate maintain continuous motion without stopping to wait for the compression plate to reset, thereby reducing the time difference of spring compression and conveying, thereby improving production efficiency.

The spiral energy storage spring and the compression spring are integrated inside, or the spiral energy storage spring, the magnetic spring and the planar spring are integrated inside, so as to realize energy storage and passive flexibility, reduce driving consumption and meet the requirement of driving agility.SOLUTION: Disclosed is a flexible joint based on an elastic element, including an involute small-tooth-number difference reducer, a spiral energy storage spring, and a flexible output module / composite flexible output module. The involute small-number-of-teeth difference reduction gear employs only an eccentric input shaft, a pair of involute internal tooth rings, and an involute planetary gear to achieve oscillation and rotation motions of the involute planetary gear. The power output of the output disc is transmitted by the interaction of the column pin and the first column pin working hole of the involute planetary gear or the second column pin working hole of the output disc. The accuracy requirement can be easily met only by the meshing form of the pair of gears, the axial dimension is compact, the pair of gears adopt involute tooth profile, and the manufacturing cost is low.SELECTED DRAWING: Figure 1

The invention provides a passive vibration isolation device with a three-degree-of-freedom magnetic spring, particularly relates to a passive vibration isolation device capable of bearing the self weight of precision production and detection equipment and reducing ground vibration energy transmitted into the borne equipment, and belongs to the field of passive vibration control. The device comprises a rack, a load tray, a vibration isolation system, a three-degree-of-freedom magnetic spring assembly, a coupling mechanism, a horizontal vibration isolation assembly, a vertical vibration isolation assembly, a stator unit, a mover unit, a guide mechanism, a stator unit base, a stator magnet, a stator magnet pressing plate, a mover unit base, a mover magnet, a z-direction guide rail sliding block module, a z-direction motion platform and a y-direction guide rail sliding block module. A y-direction motion platform; and an x-direction guide rail slide block module. The device is provided with a plurality of pairs of rotor units and stator units in different directions, and the vibration isolation capacity of the device in the vertical direction and the horizontal direction is adjusted through the anisotropic rigidity between the rotor units and the stator units. The vibration isolation capacity is improved without influencing the bearing capacity, meanwhile, the multi-direction vibration isolation capacity is adjusted, and the design is simplified.

To provide an actuator and a system having an operation detection function and a tactile feedback function, which can be easily manufactured at low cost and can be more easily used.SOLUTION: An actuator that presents an output perceivable by a user by driving a movable body having a magnet in accordance with movement of the movable body by an operation of the user includes a coil that generates a magnetic field by energization to move the movable body, and a fixed body in which an outer yoke that is a magnetic body is disposed outside the coil in a radial direction, and the magnet and the outer yoke constitute a magnetic spring by a magnetic attraction force between the magnet and the outer yoke.SELECTED DRAWING: Figure 2

The utility model discloses a boiler heating surface pipe foreign matter falling prevention plugging plug with multi-caliber adaptability, which comprises a plugging plug body, a connecting chain and a magnetic spring clip, one end of the connecting chain is connected with the plugging plug body, and the other end of the connecting chain is connected with the magnetic spring clip; the plugging plug body comprises an elastic plug and an end cover, and the elastic plug is connected to the bottom of the end cover; the elastic plug comprises an elastic cone and elastic pressing plates, and the elastic pressing plates are circumferentially distributed on the outer side of the elastic cone. The pipe orifice temporary plugging device can adapt to temporary plugging of pipe orifices in a certain specification range, and has high field applicability; and the connecting chain and the magnetic spring clamp are additionally arranged, so that the plugging plug can be locked outside the pipe, the plugging plug is prevented from falling off and hurting people, the pipe and the like due to improper installation and the like, and the use safety is high.

The utility model relates to a linear and rotary motion module for a chip mounter, which comprises a shell used for accommodating and fixing each functional part of the motion module; the element suction part comprises a coil fixing block, a hollow structure pipeline is arranged in the coil fixing block, and the other end of the pipeline is connected with the output shaft; air holes are formed in the side surface of the output shaft; the linear motion part comprises a sliding block, a guide rail and a linear motor; the rotary motion part comprises a permanent magnet synchronous motor, a coupler and a bearing and is used for realizing rotation of the output shaft; the gravity balance component adopts a magnetic spring mode; the position feedback part comprises a magnetic grid and a position encoder control panel and is used for determining the moving position of the coil fixing block; and the electric control part is used for connecting all the parts and providing energy and control. According to the utility model, the size of the module is reduced, stable and flexible control of linear and rotary motion is realized, and pressure control and angle control of absorbing and releasing electronic components can be better carried out.

The utility model relates to the technical field of semiconductor detection, in particular to an ultrasonic detection instrument which comprises a fixed seat, a groove is formed in the surface of the fixed seat, a water tank is arranged in the groove, a bearing plate is arranged above the water tank, a limiting ring is arranged on the bearing plate, and a wafer is placed on the limiting ring; the pair of first driving mechanisms is mounted on the fixed seat; the second driving mechanism stretches across the groove, and the two ends of the second driving mechanism are arranged on the first driving mechanism in a sliding mode to serve as rotors of the first driving mechanism; the sliding device comprises a sliding block and a plurality of detection devices, the sliding block is arranged on the second driving mechanism in a sliding mode, the multiple detection devices are all located above the wafer and used for detecting the wafer, each detection device comprises a third driving mechanism, a magnetic spring and a detection head, and the driving end of the third driving mechanism is connected with the detection head and drives the detection head to be close to or away from the wafer. The magnetic spring is connected with the third driving mechanism, and when power is off, the magnetic spring supports the driving end of the third driving mechanism to keep the height unchanged.

The application relates to an expander assembly and a Stirling refrigerator, which comprises an expander base, a cold finger in sealed connection with the expander base, a pusher assembly in the expander base and the cold finger, and an expansion cavity formed by the cold finger and the pusher assembly; and a magnetic spring assembly arranged close to the expansion cavity and used for generating a magnetic force applied to the pusher assembly, wherein the action direction of the magnetic force is opposite to the movement direction of the pusher assembly during movement. The magnetic part of the application is continuously in a low-temperature environment, so as to continuously have a larger magnetic flux, and the magnetic part is prevented from falling off due to debonding, and meanwhile, the overall volume of the product is further reduced, so that the product structure is more compact.