37 results about "Magnetic spring" patented technology

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 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).

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.

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

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 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 utility model discloses a moving mechanism and a high-precision robot for the dispensing industry, and belongs to the technical field of robots, H-shaped grooves are formed in two opposite end faces of one group of a sliding block main body, two brake blocks are arranged in the H-shaped grooves in a mirror image mode, springs for clamping guide rods are arranged between the brake blocks and the H-shaped grooves, and the guide rods are connected with the H-shaped grooves through bolts. An air channel is arranged on the sliding block body, a plurality of outlets of the air channel are formed in the H-shaped groove, a plurality of driving grooves are formed in the brake blocks, brake push blocks are arranged in the outlets of the air channel, and the brake push blocks are matched with the driving grooves to achieve separation of the two brake blocks. The electromagnetic driving mode is adopted for transmission, no contact exists during operation, the problems of abrasion and the like do not exist, the response speed is high, and the operation speed is increased. The sliding block is provided with a normally-closed brake structure, so that the robot is accurately positioned. A Z-direction moving mechanism and a glue head can be added according to requirements, so that the dispensing efficiency is improved. And the constant-force magnetic spring is used, so that Z-axis positioning precision can be guaranteed, the dispensing mechanism is prevented from falling, and use safety is guaranteed.

The utility model relates to a linear motor balancing device which comprises a base and a stator arranged on the base, a guide rail is arranged on the base, a bearing plate is arranged on the base in a sliding mode through the guide rail, a rotor is arranged on the bearing plate, and the linear motor balancing device further comprises a magnetic spring assembly arranged on one side of the base; the mounting seat is arranged on the magnetic spring assembly; according to the linear motor balancing device, the bearing plate and the magnetic sleeve are conveniently connected through the connecting plate, the embedding plate on the connecting plate slides into the embedding groove of the bearing plate, and the bearing plate and the magnetic sleeve are connected through the connecting plate. And the U-shaped seat at the lower end is accurately matched with the groove in the mounting seat and is connected with the mounting seat through a bolt, so that the mounting and the dismounting are convenient, the connection tightness can be ensured, and the maintenance efficiency of the equipment is greatly improved.

The invention relates to the technical field of detection, in particular to a scanner assembly, a detection device and a carrier. The scanner assembly comprises a base, a rotating part, a magnetic drive assembly, a magnetic repulsion assembly and a reflector. The rotating part is rotationally connected to the base around a first axis. The magnetic drive assembly comprises a stator and a rotor, one of the stator and the rotor comprises a winding, and the other comprises a magnetic part; the magnetic repulsion assembly comprises a first magnet and a second magnet which are fixedly connected with the winding, and the first magnet and the second magnet are respectively used for generating repulsive force with the magnetic part; the reflector is fixed on the rotating member. According to the embodiment of the invention, the magnetic repulsion assembly and the magnetic part form the magnetic spring, so that the rotor can be driven to rapidly reverse the rotation direction, the working time ratio is improved, and the resolution is improved. Moreover, a part of the magnetic spring is formed by a magnetic part in the magnetic drive assembly, so that the weight of the rotor is reduced, the start and stop of the rotor and the change of the rotation direction are facilitated, and the resolution is improved.

The invention relates to an active part (1) for an electric machine comprising: - an active part body (3) for holding a magnetic spring generating component (5) of the active part (1), - Recesses (7) which extend axially through the active part body (3), as well as - at least one blow molded part (11) extending axially through the active part body (3) and arranged within at least one recess (7), which forms a contour of the at least one recess (7) and thereby lines the at least one recess (7) and which encloses a cavity (9) extending axially through the active part body (3).

The application discloses a wave energy collection device based on a magnetic spring-leaf spring type bistable mechanism, comprising a bistable energy trapping device (1), a motion conversion device (2), an electromagnetic power generation device (3) and a power management module, wherein the bistable energy trapping device is provided with a magnetic spring-leaf spring type bistable mechanism, and through nonlinear interaction between magnets, efficient capture of mechanical energy under low-frequency waves is realized; the motion conversion device (2) is designed through a gear transmission system and a one-way bearing, so that one-way rotation of an output shaft is ensured; the electromagnetic power generation device (3) utilizes the relative rotation principle of a magnet flywheel and a coil, the magnetic flux of the coil changes, so that a voltage is generated, mechanical energy captured by the bistable energy trapping device (1) is converted into electric energy, and simultaneously, the power management module is responsible for rectification, storage and distribution of the electric energy, so that stable power supply can be obtained under any condition. The system has wide application prospects and important economic value in the fields of marine ecosystem monitoring, climate change research and marine pollution monitoring.

Solenoid device (1) with: an electromagnetic coil (2) through which an electric current is passed to generate a magnetic flux (φ); a fixed core (3) which is arranged in the electromagnetic coil (2); a movable core (4) which performs a reciprocating movement in an axial direction of the electromagnetic coil (2) depending on whether an electric current passes through the electromagnetic coil (2); a magnetic spring (5) arranged between the fixed core (3) and the movable core (4) and comprising a magnetic substance, wherein the magnetic spring (5) biases the movable core (4) in a direction away from the fixed core (3) in the axial direction; and a yoke (6) which is included in a magnetic circuit (C) in which the magnetic flux (φ) flows, wherein the magnetic circuit (C) further comprises the magnetic spring (5), the movable core (4) and the fixed core (3), wherein When an electric current passes through the electromagnetic coil (2), the movable core (4) is attracted to an access position by an electromagnetic force against a spring force of the magnetic spring (5), the access position being relatively close to the fixed core (3), the electromagnetic force arising from the conduction of the electric current; and when the conduction of the electric current through the electromagnetic coil (2) is stopped, the movable core (4) is moved to a separation position by the spring force of the magnetic spring (5), the separation position being farther from the fixed core (3) than the access position. the magnetic spring (5) comprises a leaf spring element (50) which has the magnetic substance and is wound in such a spiral manner that a thickness direction of the leaf spring element (50) coincides with a radial direction of the electromagnetic coil (2), wherein a central section (51) of the magnetic spring (5) is biased to one side in the axial direction compared to a circumferential section (52) of the magnetic spring (5), and When the movable core (4) is attracted to the access position, the magnetic spring (5) is prevented from extending to a minimum spring length (L). MIN ) is deformed, which corresponds to a width of the leaf spring element (50) in the axial direction.

The utility model provides a flow switch with flow regulation structure, including the casing, is provided with the import end and export end respectively in the both ends of casing, still include the magnetic spring switch subassembly of setting in the lateral part of casing, swing setting in the magnetic component of casing, set up flow regulation subassembly in import end, casing lateral part is provided with the mounting hole of being linked with import end and export end respectively, the magnetic component includes the mounting block of one side with mounting hole connection, swing setting in the magnet swing block of mounting block close to the one side of mounting hole, magnet swing block and magnetic spring switch subassembly magnetism is connected, the utility model provides a flow switch with flow regulation structure, through setting flow regulation subassembly in the import end of casing, through the cross section area of valve core rotation adjustment fluid flow, and then make the trigger flow regulation of magnetic spring switch fast and accurate, realized the function of flow setting and signal trigger, the compact structure of flow switch, installation safe and reliable, improved the regulation adaptability of magnetic spring flow switch.

The invention discloses a wire stripper based on operation of a distribution network hot-line work robot and an operation method, and relates to the technical field of hot-line work cable auxiliary equipment. According to the main technical scheme, a base is used for being connected with a mechanical arm of a robot; a stator of the constant-force magnetic spring is connected to the base; the wire stripper body is connected to a rotor of the constant-force magnetic spring, and the wire stripper body is parallel to the axis direction of the stator along the moving direction of the wire; when the wire stripper body moves along the wire, the rotor synchronously moves in the direction from one end of the stator to the other end of the stator. By utilizing the physical characteristics of the constant-force magnetic spring, passive flexible connection is established between the wire stripper body and the mechanical arm, so that the mechanical arm does not need to cooperatively follow the wire stripper body. Therefore, speed mismatch caused by wire condition change or communication delay can be automatically compensated, and accumulated displacement deviation in the movement process can be effectively eliminated or greatly reduced, so that the continuity and accuracy of a wire stripping path can be ensured.

A kind of magnetic drive shell dot matrix pipe crawling soft robot and method, belong to the field of robot, in the robot: front and rear anchoring components are located in the two sides of magnetic spring, the tail of front anchoring component is connected with magnetic spring by front connecting ring, the head of rear anchoring component is connected with magnetic spring by rear connecting ring;Front constraint ring is connected with the head of front anchoring component, rear constraint ring is connected with the tail of rear anchoring component. Front, rear anchoring component, magnetic spring are by the integrated shell dot matrix structure of soft material with magnetism, when being placed in the magnetic field space generated by magnetic field generator, the magnetic field generated by magnetic field generator can drive it to generate active deformation. The soft robot of the application realizes crawling movement in pipe by the coordinated deformation of integrated dot matrix structure with magnetism composed of magnetoelastic body under magnetic field excitation, is completely composed of soft material, and can crawl in flexible pipe;Robot is driven to crawl by magnetic field wirelessly, does not need to carry air pipe and wire in the process of crawling.

To stably give strong tactile feedback to a user in response to the user's operation even when an external load is applied.SOLUTION: A movable body including a disc-shaped magnet, a pair of disc-shaped yokes fixed to a front surface and a back surface of the magnet, and a protruding part protruding from one of the pair of disc-shaped yokes in an axial direction of the magnet, a coil disposed on an outer periphery of the movable body, an outer yoke that is a magnetic body disposed on a radially outer side of the coil, and a case that has an opening through which the protruding part is inserted, and houses the movable body together with the coil with a protruding end side of the protruding part protruding to an outside, and a fixed body configured to movably support the movable body in an axial direction of the magnet, wherein the magnet and the outer yoke form a magnetic spring by a magnetic attraction force between the magnet and the outer yoke, and the opening supports an outer periphery of the protruding part so as to move the protruding end side forward and backward along the axial direction on the outside.SELECTED DRAWING: Figure 2

The application discloses a three-point leveling device and method for a proximity contact photolithography workpiece table, and belongs to the technical field of microelectronic manufacturing equipment. The device comprises a mask, a wafer support, three cross-roller sliding tables, three ball hinges, three linear guides, three magnetic springs, photoelectric limit switches, three guide clamps, a base and a lifting driving mechanism. The mask is fixed to the top as a leveling reference; the wafer support adsorbs and fixes a sample; the cross-roller sliding table and the ball hinge form a flexible support unit; the linear guide is installed on the base and fixes the moving end of the magnetic spring; the magnetic spring is distributed along the circumference and provides adjustable elastic force; the guide clamp is used for locking the guide; the photoelectric limit switch detects sliding displacement; and the lifting driving mechanism drives the lifting and cooperates with locking. The application realizes the combination of coarse adjustment and fine adjustment, and the leveling process is reasonable and fine.

The invention discloses a cab shock absorber and a crane, and belongs to the technical field of shock absorption of vehicles and engineering machinery. The shock absorber comprises a guide shaft, an upper cover plate, a negative rigidity shock absorption element, a cylinder barrel and a positive rigidity shock absorption element. The upper end and the lower end of the positive-rigidity damping element are connected with the upper cover plate and the lower supporting plate respectively, and the inner side is coaxially connected with the cylinder barrel. The negative stiffness damping element comprises a first magnetic ring and a second magnetic ring which are coaxially arranged and are respectively fixed on the guide shaft and the inner wall of the cylinder barrel, and the stiffness is dynamically adjusted by adjusting the current of an electromagnetic coil on the first magnetic ring and the second magnetic ring; the air chamber of the air spring is connected with the external air containing cavity through the air pressure pipeline provided with the micro-perforated plate, so that a high-damping structure is formed; and the negative stiffness magnetic spring is connected with the air spring in parallel, so that the characteristics of high static stiffness and low dynamic stiffness are realized, and low-frequency vibration is effectively inhibited.

A cryocooler is disclosed. The cryocooler may include a magnetic spring, a regenerator / displacer, a working fluid, and a cold finger configured to contain the working fluid in a closed system, and to contain the regenerator / displacer that is configured to travel linearly within the cold finger. The magnetic spring may provide a force to cause the regenerator / displacer to return to a center position during thermal cycle operation of the cryocooler. Additional systems and related methods are also provided.

To provide users with strong tactile feedback by responding quickly to their actions. [Solution] The movable body includes a disc-shaped magnet, a pair of disc-shaped yokes fixed to the front and back surfaces of the magnet, a projection that protrudes in the axial direction of the magnet from one of the disc-shaped yokes, a coil disposed on the outer circumference of the movable body, an outer yoke which is a magnetic material disposed radially outside the coil, and a case which has an opening through which the projection is inserted and houses the movable body together with the coil, with the protruding end of the projection protruding to the outside, and a fixed body which supports the movable body so that it can move in the axial direction of the magnet, a magnetic spring formed by magnetic attraction force between the magnet and the outer yoke, and the opening is formed with a gap between it and the outer circumference of the projection so that the projection can move without contact.

The invention discloses a simple harmonic motion module structure, and belongs to the technical field of machine manufacturing. The structure comprises a stator, a moving part and a guide mechanism, the stator is provided with a magnetic conductive shell and an internal coil, and the moving part is arranged in an inner cavity of the shell and composed of a permanent magnet and magnetizers at the two ends of the permanent magnet. Electromagnetic driving force is generated by electrifying the coil to drive the moving part to do reciprocating motion through the guide mechanism; when power is cut off, the moving part is automatically reset to the balance position through magnetic attraction force formed between the permanent magnet and the magnetic conductive shell, and magnetic spring type self-centering is achieved. Electromagnetic drive and magnetic reset are combined, a traditional mechanical transmission chain and a reset spring are omitted, and the electromagnetic reset mechanism has the advantages of being compact in structure, fast in response, small in abrasion, accurate in reset and capable of supporting high-frequency adjustable simple harmonic motion and is suitable for precise reciprocating motion occasions such as textile beating-up, optical scanning and medical equipment.

The high-frequency switch type magnetic spring assembly comprises a rotating shaft, a main magnetic pole box and a bearing seat, a magnetic core is fixed to the bottom end of the rotating shaft, and the magnetic core is magnetized in the radial direction; the main magnetic pole box comprises a first shell, a first magnetic shoe and a second magnetic shoe, the first magnetic shoe and the second magnetic shoe are oppositely attached to the inner wall of the first shell, the outer wall of the magnetic core is opposite to the inner walls of the first magnetic shoe and the second magnetic shoe, the first magnetic shoe and the second magnetic shoe are axially magnetized, and the directions of internal magnetic fields are opposite; the rotating shafts of all the assemblies are synchronously driven by the motor, so that the magnetic cores are fixed at the bottom ends of the rotating shafts, the rotating shafts drive the magnetic cores to rotate, the rotating magnetic cores and the first magnetic shoe and the second magnetic shoe in the main magnetic pole box generate magnetic field changes, opening and closing of a magnetic circuit are achieved according to the halbach magnetic circuit principle, and therefore opening and closing of repulsive force are achieved. The controllable magnetic spring can be applied to special working conditions.

The invention discloses a stiffness coefficient adjustable magnetic spring-based single-mode oscillator, which comprises a stiffness coefficient adjustable magnetic spring-based single-mode oscillator body, and is characterized in that the stiffness coefficient adjustable magnetic spring-based single-mode oscillator body comprises a rotor assembly and a stator assembly; the rotor assembly comprises a first permanent magnet, the stator assembly comprises a second permanent magnet, adjacent surfaces of the first permanent magnet and the second permanent magnet have the same or opposite polarities, and a magnetic spring is formed between the first permanent magnet and the second permanent magnet; or the rotor assembly comprises a first permanent magnet, the stator assembly comprises a first magnetizer, a gap is formed between the first permanent magnet and the first magnetizer, the first permanent magnet and the first magnetizer attract each other, and a magnetic spring is formed between the first permanent magnet and the first magnetizer; or the mover assembly comprises a first magnetizer, the stator assembly comprises a first permanent magnet, a gap is formed between the first permanent magnet and the first magnetizer, the first permanent magnet and the first magnetizer attract each other, and a magnetic spring is formed between the first permanent magnet and the first magnetizer.

The invention discloses a ball screw auxiliary device which comprises a control system and an annular supporting base, and a plurality of supporting assemblies are arranged on the base in the circumferential direction. Each assembly comprises a rolling body, a movable part and a sleeve connected with the driving unit; the output end of the driving unit is connected with the tail end of the movable part in an abutting mode through a first magnet and a second magnet which repel each other to form a non-contact magnetic spring. A radial necking part is arranged in the sleeve and is matched with the plummer block part of the movable piece for guiding and limiting; and a pressure sensor is arranged in a shaft hole of the rolling body. The sensor monitors the supporting force in real time and transmits the supporting force to the control system, and when the pressure deviates from a preset value, the output end of the driving unit is controlled to advance and retreat, the magnet gap is adjusted, the movable piece conducts self-adaptive displacement, and the rolling body is kept attached to the workpiece. Dynamic flexible supporting of the slender and variable-diameter workpiece is achieved, machining vibration and deformation are effectively restrained, and precision and reliability are improved.

The plane self-adaptive stepless pressurization grinding device based on gravity compensation comprises a rack, an upper grinding assembly, a lower grinding assembly, a stepless pressurization module and a constant-force magnetic spring. The stepless pressurization module comprises a floating flange plate connected with the upper grinding assembly and a liquid container, the liquid container is connected with a water tank through a water pipe and a metering pump, during polishing, liquid can be added into the liquid container to increase the weight of the upper grinding assembly, pressure is applied to a workpiece, and a pressure sensor at the bottom of the lower grinding assembly is matched to achieve polishing. Stepless pressurization can be achieved, pressurization time limitation is avoided, the pressure maintaining stability is good, and different pressure requirements can be met by adjusting the size of the liquid container and the liquid density; the constant-force magnetic spring is composed of a stator and a rotor, gravity compensation is achieved through a magnetic field, the constant-force magnetic spring is used for balancing the weight of the movable part, the initial balance position of the stepless pressurization module is guaranteed, precise control over pressure during polishing is facilitated, then the polishing precision can be improved, and the polishing quality is good.

The present invention relates to the technical field of electric motors, and specifically relates to a stepping motor. The stepping motor comprises a first cover plate, a second cover plate, and a stator assembly and a rotor assembly sandwiched between the first cover plate and the second cover plate; and a first magnetic spring sleeved on a rotating shaft of the rotor assembly, wherein the first magnetic spring comprises an annular first magnetic ring and second magnetic ring, the inner diameters of the first magnetic ring and the second magnetic ring being greater than the diameter of the rotating shaft, and the first magnetic ring and the second magnetic ring being magnetized in the direction of thickness and the magnetization directions being opposite. Compared with the prior art, the present invention effectively enhances the axial constraint of an electric motor rotor by adding a non-contact magnetic spring to the rotating shaft of the rotor, thereby eliminating axial end play; moreover, there is no physical contact between the non-contact magnetic spring and the rotating shaft, and thus no additional friction force is introduced; the output torque outperforms that of existing contact-type coil springs or elastic washers, and the operational noise of the electric motor is greatly reduced.

The utility model provides an adjustable constant force magnetic spring precision positioning platform, which comprises a first platform body, a second platform body and a magnetic spring assembly, the magnetic spring assembly comprises a fixed seat, the fixed seat is fixedly arranged on the second platform body, an outer magnet is arranged on the fixed seat, and an inner magnet corresponding to the outer magnet is arranged in a sleeve; an adjusting body is arranged on the first platform, a supporting seat is arranged on the second platform, one end of the sleeve is connected with the supporting body, the other end of the sleeve is connected with an adjusting part, and the rotating angle of the inner magnet in the sleeve is adjusted through the adjusting part. The utility model has the advantages of higher load capacity, adjustable load capacity, wide range, convenience in load balance adjustment, and high positioning precision and repetition precision.