20results about How to "Increase thrust density" patented technology

The invention relates to the technical field of mechanical joints, in particular to a humanoid robot linear electric drive joint which comprises a shell, a front end cover and a rear end cover, the front end cover and the rear end cover are fixed to the two ends of the shell respectively, and an execution assembly and a drive control assembly are arranged in the shell; the execution assembly comprises a reverse planetary roller screw and a motor, and the drive control assembly comprises an encoder composed of a coded disc and a magnetic ring, a pull pressure sensor and a driver. Aiming at the technical problem that an existing linear joint has defects, a reverse planetary roller lead screw is adopted as a main transmission component, and the lead screw, a roller and a nut of the reverse planetary roller lead screw are in linear contact, so that high precision, long service life, high integration level and high thrust density can be achieved while high bearing and high speed are achieved; therefore, the method is suitable for use scenes of humanoid robot joints.

The invention relates to a cooling structure for an ultraprecise linear motor and belongs to the technical field of linear motors. The cooling structure solves the problem of proneness to heat exchange with environment caused by high side temperature of two-side surface-mounted cooling structures of existing linear motors. The cooling structure comprises a winding supporting portion, a winding and a heat conductive portion, wherein the winding is fixed on the surface of the winding supporting portion, the heat conductive portion is arranged on the surface on the outer side and fixedly connected with the winding supporting portion, the heat conductive portion is a copper foil ring which fits the outer profile of the winding and is sleeved and fixed on the surface on the outer side of the winding, or the heat conductive portion is a copper foil heat conductive ring formed by arraying multiple copper foil sections in a dispersed manner, the copper coil heat conductive ring fits the outer profile of the winding, and each copper coil section is fixed on the surface on the outer side of the winding. The cooling structure for the ultraprecise linear motor is suitable for cooling of linear motors.

The invention discloses a high thrust density voice coil motor with an auxiliary enhanced magnetic circuit, which comprises a stator assembly and a rotor assembly, and is characterized in that the stator assembly comprises a magnet yoke part, a basic magnetic circuit and a first auxiliary magnetic circuit; the basic magnetic circuit comprises a plurality of radially magnetized first inner ring permanent magnets and first outer ring permanent magnets, the first inner ring permanent magnets sleeve the second magnet yoke at intervals, and the first outer ring permanent magnets are arranged on the inner wall of the first magnet yoke at intervals; the first auxiliary magnetic circuit comprises a plurality of axially magnetized second inner ring permanent magnets and second outer ring permanent magnets, each second inner ring permanent magnet is alternately embedded between two adjacent first inner ring permanent magnets, and each second outer ring permanent magnet is alternately embedded between two adjacent first outer ring permanent magnets. The voice coil motor is applied to the field of motors, the magnetic flux density of the working air gap where the coil is located is improved, magnetic flux density fluctuation can be reduced, and therefore the output force size and stability of the voice coil motor are improved.

The utility model discloses a magnetism gathering type linear motor, comprising a stator comprising a stator yoke portion extending along the X-axis direction and a plurality of stator tooth portions arranged on the stator yoke portion at intervals along the X-axis direction; the mover is arranged opposite to the stator in the Y-axis direction, and the mover comprises a mover yoke part and an iron core monomer connected with the mover yoke part; each single iron core comprises an iron core end part and first permanent magnets and second permanent magnets which are arranged on the iron core end part, the magnetizing directions of the first permanent magnets and the second permanent magnets are not parallel, the first permanent magnets and the second permanent magnets are alternately arranged along the X-axis direction, the number of the first permanent magnets is N, the number of the second permanent magnets is N-1, and N is greater than or equal to 2; the stator tooth part comprises a stator top wall adjacent to the iron core single body and two first stator side walls connected to the two sides of the stator top wall in the X-axis direction, and a chamfer structure is formed between the stator top wall and the first stator side walls. By adopting the structure, the magnetic gathering effect is obvious, and the cogging force of the motor is effectively reduced.

The present invention discloses an extreme high power density cylindrical linear motor, comprising a frame, a cylindrical primary assembly, a secondary assembly, a connecting piece, a hanging piece and a friction pair sliding piece; the frame comprises a primary mounting assembly, a long strip-shaped beam and a hanging piece; there are two primary mounting assemblies, which are respectively sleeved on the two ends of the primary assembly, the secondary assembly is sleeved in the middle of the primary assembly, and there are two long beams, which are symmetrically mounted on the upper and lower ends of the two primary mounting assemblies; a vertical hollow structure is arranged on the end face of the long beam close to the primary assembly, a horizontal hollow structure is arranged in the middle of the long beam, the hanging piece is embedded in both sides of the long beam, and grooves for placing the friction pair sliding pieces are also provided on the left and right side surfaces of the hanging piece, so that the winding utilization rate is high; the secondary is a cylindrical iron core with an embedded permanent magnet structure, which does not need to be powered by wires, so that it is easy to install and convenient to be hung with an execution structure; the motor has a small volume and weight and has a high thrust density.

The invention discloses a cross-shaped structure long primary bilateral linear induction motor, comprising a primary component, a secondary component, a right-angle internal support component, a machine base and a secondary track; the machine base is a long hollow frame structure; there are multiple groups of right-angle internal support components, which are evenly fixedly installed on the inner side of the machine base in the circumferential direction, and a cross-shaped installation space is formed inside the machine base between the multiple groups of right-angle internal support components, and a primary component is fixedly arranged on the side of each right-angle internal support component, and the secondary track is fixedly installed inside the cross-shaped installation space. The secondary component is in a cross structure and is installed in the middle of the cross-shaped installation space through the secondary track, and each cross side of the secondary component passes through the air gap between the upper, lower, left and right primary component pairs; the motor has a compact structure, and the motor size and weight are small; at the same time, the two effective sides of the annular winding are utilized, and the two useless end windings are eliminated, so the loss of the end winding is reduced and the motor efficiency is improved.

The utility model discloses a shaft driving type linear motor with an external encoder, which belongs to the technical field of linear motors, and comprises a magnetic shaft assembly and a body assembly, the body assembly is fixed on a working platform, the magnetic shaft assembly is arranged in the body assembly in a sliding manner, a plurality of cylindrical magnetic steels are arranged in the magnetic shaft assembly, and the magnetic steels are arranged in the magnetic shaft assembly. Different magnetic poles of adjacent magnetic steels are close to each other, a three-phase winding is arranged in the body assembly, three leads of the three-phase winding are electrified with three-phase alternating current, an alternating magnetic field generated after the three-phase winding is electrified is coupled with a magnetic field of the magnetic steels in the magnetic shaft assembly, and then the magnetic shaft assembly is driven to reciprocate in the body assembly. The linear motor disclosed by the technical scheme of the utility model has the advantages of low inertia, high acceleration and no cogging effect, is relatively high in response speed and precision, and is suitable for application scenes with high frequency requirements.

This invention belongs to the field of permanent magnet motor technology, specifically relating to a dual-secondary modular permanent magnet flux switching linear motor and its manufacturing method, comprising a motor primary and a motor secondary, with an air gap structure provided between the motor primary and the motor secondary; wherein, the motor primary includes at least one motor primary module with identical structure; the motor primary module includes an iron core, a permanent magnet, and an armature coil; the permanent magnet is placed inside the iron core, and the permanent magnet is distributed in a double U-shape around the armature coil; the motor secondary adopts an axisymmetric double-sided secondary structure composed of an iron core.

This utility model discloses a mover structure and a linear motor. The mover structure includes a mover yoke and multiple mover units. Each mover unit includes a mover tooth, a winding, a pole shoe, and two first permanent magnets. The pole shoe includes a main body and a side protrusion. Two mounting slots are spaced apart in the pole shoe. Each mounting slot includes a first slot segment and a second slot segment corresponding to the main body and the side protrusion, respectively. The bottom wall of the second slot segment has an opening. The two first permanent magnets are mounted in the two mounting slots. The pole shoe has a first chamfer structure at each edge on the outer side of the main body, at each edge of the mounting slot located at its opening, and at least one edge of the second slot segment located at its opening. This utility model helps to achieve thrust stability as much as possible while maintaining a relatively high thrust density.

The invention discloses a primary-secondary three-area V-shaped hybrid permanent magnet linear stepping motor, which adopts a bilateral flat structure with a middle secondary and two side primary, air gaps exist among a first mover, a stator and a second mover, and the first mover and the second mover are symmetrical about the stator; the first mover and the second mover are the same in structure and each comprise a plurality of T-shaped iron cores, and a V-shaped hybrid permanent magnet structure is arranged between every two adjacent T-shaped iron cores. The stator comprises a salient pole iron core with a plurality of small teeth, a V-shaped permanent magnet structure C is arranged in the salient pole iron core, neodymium iron boron permanent magnets O are embedded in small grooves of the salient pole iron core at intervals, and the neodymium iron boron permanent magnets O on the upper side and the lower side are distributed in a staggered mode. The motor is of a five-phase hybrid permanent magnet structure, and has the advantages of being large in thrust density, high in thrust quality, high in power density, high in positioning precision, high in loading capacity, high in efficiency, high in reliability and the like. The thrust density and the loading capacity can be further improved by changing the magnetization level of the aluminum-nickel-cobalt permanent magnet and adjusting the air-gap magnetic field.

The utility model discloses an axial magnetic bearing stator which comprises a main stator assembly and an end face magnetic conduction stator assembly. The main stator assembly comprises a magnetic conductive stator iron core, the magnetic conductive stator iron core is radially divided into at least two sub magnetic conductive stator iron cores, each sub magnetic conductive stator iron core is provided with a coil in a back winding manner, and the sub magnetic conductive stator iron cores are combined and connected along the circumferential direction of the rotor shaft; the end face magnetic conduction stator assembly comprises a magnetic conduction side plate, the magnetic conduction side plate is in an annular shape and is divided into at least two sub magnetic conduction side plates in the radial direction, one side face of each sub magnetic conduction side plate is provided with a gasket, and the sub magnetic conduction side plates are combined and connected in the circumferential direction of the rotor shaft. The side face, provided with the gasket, of the combined magnetic conductive side plate is connected with the side face, away from the thrust disc, of the combined magnetic conductive stator iron core in an assembled mode. The main stator assembly and the end face magnetic conduction stator assembly are both designed in a split type structure, and installation and use of thrust discs with different diameters and axial magnetic bearings under a motor rotor can be met.

The application discloses a novel high-temperature-resistant coreless linear motor with a water-cooling heat dissipation structure and belongs to the technical field of linear motors. The motor comprises upper and lower stator assemblies arranged in parallel and a mover component arranged in the passages of the two stator assemblies. The stator assembly is formed by fastening a stator yoke plate, a permanent magnet array and a water-cooling support plate to form a sealed liquid-cooling chamber. The permanent magnet array is completely immersed in the cooling liquid. An S-shaped flow guide rib is arranged in the chamber. The end of the water-cooling support plate is provided with a liquid inlet and a liquid outlet and is externally connected with a water-cooling machine. The water-cooling support plate is made of a non-magnetic high-thermal-conductivity material. The mover component comprises high-temperature-resistant winding coils and is wound by inorganic insulation foil wires and is integrally solidified by a high-temperature-resistant material. The application can ensure that the permanent magnet always works in a stable magnetic performance interval at a temperature of 300 DEG C or above, ensures large thrust output, significantly suppresses thrust fluctuation and improves the operation reliability of the system.

The application discloses a guide rail embedded type linear motor module, which comprises a guide rail and a sliding block; a groove is arranged on the inner surface of the sliding block and on the two sides of the guide rail, a rolling body raceway made of carbon steel or stainless steel is embedded in the groove, a return hole is arranged in the sliding block, return end covers are fixedly installed on the left and right ends of the sliding block, a rotary groove is arranged in the return end cover, the rolling body raceway, the return hole and the rotary groove form a rolling circulation rotary channel, and a rolling body made of stainless steel is installed in the rolling circulation rotary channel; the return hole is located above the rolling body raceway; a magnetic grating ruler or an optical grating ruler is arranged on the guide rail, and an optical grating reading head is arranged on the sliding block; a linear motor stator is installed on the guide rail, a linear motor rotor corresponding to the linear motor stator is arranged on the sliding block, and the motor rotor is communicated with a power supply. The application ensures that the rolling body does not pass through the magnetic induction line range when rotating, guarantees that the rolling body is not magnetized, and guarantees the smoothness of the rolling body rotation.

The point suction type double-buoy wave power generation device comprises a magnetic motor, a rotor of the magnetic motor and an inner buoy are kept static relatively, the upper portion of the hollow inner buoy is movably arranged in an outer buoy, a stator and the outer buoy are static relatively, and the rotor is rotationally arranged in an inner hole of the stator; the rotor penetrates through an inner hole of the rotor, an air gap is formed between the rotor and the rotor, a damping disc is fixed to the bottom face of the inner buoy, the inner buoy is moored in a sea area through sinking stones, the outer buoy can do vertical linear reciprocating motion along with waves, the rotor and the rotor can generate a spiral magnetic field, and the rotor is driven to rotate through magnetic field coupling. Therefore, the rotor cuts magnetic induction lines to generate electric energy. According to the wave energy power generation device, friction between parts is avoided, and the thrust density and the wave energy conversion efficiency of the wave energy power generation device are improved.

The application discloses a high thrust density cylindrical linear motor based on a wave-shaped air gap, which is composed of a wave-shaped stator core, an armature winding, a wave-shaped permanent magnet and a mover core, a wave-shaped air gap is arranged between the stator and the mover in the circumferential direction, the air gap area is increased, the air gap magnetic flux density distribution is adjusted, and the output thrust quality is improved. A wave-shaped permanent magnet excitation structure is arranged on the mover, the stator tooth top is arranged in a wave-shaped distribution same as the permanent magnet excitation structure distribution in the circumferential direction, and the air gap length is ensured to be equal everywhere. The wave-shaped permanent magnet excitation structure is composed of a plurality of pairs of permanent magnets arranged in a wave-shaped distribution in the circumferential direction and stacked in the axial direction, can generate a magnetic aggregation effect, and improve the excitation capacity in the motor. The cylindrical linear motor disclosed by the application has the characteristics of large output thrust, high thrust density and high efficiency, and is suitable for application occasions such as numerical control machine tool machining, electromagnetic launching and automobile suspension systems which require high thrust and high efficiency.

The present invention discloses a single-degree-of-freedom active adaptive force control flange for industrial robots, which mainly includes a fixed platform, a moving platform, a linear motor, an air spring, and a guide device, etc.; and has an inner cylindrical bracket and an outer cylindrical bracket coaxially nested and installed, and the guide device is arranged between the outer side wall of the inner cylindrical bracket and the inner side wall of the outer cylindrical bracket; one end of the outer cylindrical bracket has an opening for accommodating the inner cylindrical bracket, and the other end is fixedly connected to the fixed platform; the inner cylindrical bracket is located at the inner end of the outer cylindrical bracket, and an air spring is arranged between the inner cylindrical bracket and the fixed platform, and the outer end of the inner cylindrical bracket is fixedly connected to the moving platform; the motor stator of the linear motor is installed at the opening of the outer cylindrical bracket; the motor mover is installed on the inner side of the moving platform, and is arranged coaxially with the inner cylindrical bracket. The present invention has high force control accuracy, good dynamic response performance and a large force control range, and is suitable for industries such as parts assembly and polishing.

The invention relates to an iron core linear motor with a novel structure. The linear motor with the iron core in the novel structure comprises a base, the two groups of lower sliding rails are symmetrically arranged on the base, and a stator is arranged between the two groups of lower sliding rails; the mover moving table is connected to the two sets of lower sliding rails in a sliding mode, a pair of movers is symmetrically arranged on the inner walls of the two sides of the mover moving table, and an independent air gap is formed between the stator and the movers; wherein the stator comprises a stator iron core and a coil winding, the stator iron core is of a bilateral symmetrical tooth groove structure and comprises iron core teeth and iron core grooves, and the coil winding adopts an annular winding and is wound on the iron core teeth. The coil winding adopts the annular winding, and compared with a lap winding mode of a traditional motor, the thrust of the motor is increased. The stator part and the rotor part of the motor both adopt bilateral symmetrical structures, so that the transverse stability of the system is improved. Compared with a traditional single-side linear motor and a U-shaped double-side coreless linear motor, the motor has the advantages of high thrust density and large thrust.

The application provides a ring winding four-side mixed linear stepping motor. The motor comprises a primary assembly (1), an upper secondary assembly (2), a lower secondary assembly (3), a front secondary assembly (4) and a rear secondary assembly (5), all of which are salient pole structures, and the five assemblies form a "U" shaped motor structure and a four-side air gap. The motor has the advantages of high thrust density, simple structure, convenient machining and assembly, easy heat dissipation and the like.

This invention relates to the field of voice coil motor technology, specifically to a compact multi-air-gap uniform magnetic field high-thrust planar voice coil motor, comprising a motor outer frame, a first stator, a second stator, and a third stator. The first stator is located in the middle of the motor outer frame. Two sets of second stators are respectively installed on both sides of the first stator, forming an inner air gap between the two sets of second stators. Two sets of third stators are respectively located at the upper and lower ends of the motor outer frame, forming an outer air gap between the second stator and the third stator. A set of first inner movers is disposed in the inner air gap, and several sets of second inner movers are disposed in the outer air gap. In this invention, the magnetic flux starts from the permanent magnet, passes through the yoke, crosses the working air gap, and returns to the main channel of the yoke, reducing magnetic flux leakage into the outer space, thereby improving magnetic field utilization and reducing magnetic leakage. The parallel operation of multiple air gaps increases the total thrust and thrust density without significantly increasing the overall size.

The invention discloses a C-type winding long primary bilateral permanent magnet linear synchronous motor, comprising a C-type winding support, an I-shaped mover, a slide rail frame and a C-type primary winding, wherein the C-type winding support comprises a left support and a right support of a C-shaped structure, the slide rail frame comprises a left slide rail frame and a right slide rail frame, the left support is provided with a left slide rail frame at the bottom and the top, and the right support is provided with a right slide rail frame at the bottom and the top, the left slide rail frame and the right slide rail frame are hollow tubular structures with left and right side surfaces hollowed out, the middle part of the I-shaped mover is sleeved in the gap between the left support and the right support, and the top and the bottom of the I-shaped mover are sleeved in the slide rail groove formed by the hollowing of the left slide rail frame and the right slide rail frame; the end length is reduced, the end space is saved, the resistance and inductance of the motor winding are reduced, and the motor efficiency is improved; the structure is compact and has a high thrust density.