CN111277111B - Linear motor structure - Google Patents
Linear motor structure Download PDFInfo
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- CN111277111B CN111277111B CN202010219237.4A CN202010219237A CN111277111B CN 111277111 B CN111277111 B CN 111277111B CN 202010219237 A CN202010219237 A CN 202010219237A CN 111277111 B CN111277111 B CN 111277111B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Linear Motors (AREA)
Abstract
The invention provides a linear motor structure, comprising: the linear motor body comprises a rotor and a stator, wherein the rotor is provided with a rotor end face; the stator comprises a stator mounting plate and magnetic steel, the magnetic steel is arranged on the stator mounting plate, the magnetic steel is provided with a magnetic steel side surface and a magnetic steel end surface, and the magnetic steel end surface and the rotor end surface are oppositely arranged along a first preset direction; the brake assembly is arranged on the rotor and comprises a moving piece and a first friction part, the first friction part is provided with a first separation position separated from the magnetic steel and a first brake position adsorbed on the side surface of the magnetic steel, and the first friction part is arranged on the moving piece; the moving part is movably arranged to drive the first friction part to move between a first braking position and a first separation position. The linear motor structure solves the problem that the braking system of the linear motor in the prior art cannot fully utilize the magnetic force of the magnetic steel and is complex.
Description
Technical Field
The invention relates to the field of braking devices, in particular to a linear motor structure.
Background
For the traditional transmission mode of a rotating motor and a lead screw, as intermediate links such as gears, lead screw pairs, couplings and the like are required to pass from the motor to a working part, the problems of elastic deformation, reverse clearance, motion lag, friction, vibration, noise, abrasion and the like exist, and the problems are difficult to fundamentally solve. In addition, the running speed of the transmission mode is low and can only reach 30-40 m/min generally. The linear servo transmission system adopts a direct drive mode, has the advantages of wide operating speed range, high acceleration, high positioning precision and the like, has the speed of over 200m/min and the acceleration of over 10g, and is particularly suitable for precise and high-speed application occasions, such as high-end numerical control machines, semiconductor processing equipment and the like.
In order to ensure the safety of the linear motor and the processed materials, a braking structure is required to be arranged particularly in a system of the linear motor which vertically moves, and braking protection is realized when the power is off. For horizontal motion systems, braking devices are sometimes required for braking after motion in place and for protection during power outages.
However, the existing brake device mostly depends on a hydraulic device, a hydraulic cylinder, a hydraulic valve and an oil duct need to be arranged, and the structure of the device is complex; the other braking device needs to install an independent braking support and a slide way or needs to lay magnetic steel independently to construct a permanent magnet braking section, so that the magnetic force in the horizontal direction of the side of the stator magnetic steel of the linear motor is wasted.
Disclosure of Invention
The invention mainly aims to provide a linear motor structure to solve the problem that a braking system of a linear motor in the prior art cannot fully utilize the magnetic force of magnetic steel and is complex.
In order to achieve the above object, the present invention provides a linear motor structure including: the linear motor body comprises a rotor and a stator, wherein the rotor is provided with a rotor end face; the stator comprises a stator mounting plate and magnetic steel, the magnetic steel is arranged on the stator mounting plate, the magnetic steel is provided with a magnetic steel side surface and a magnetic steel end surface, and the magnetic steel end surface and the rotor end surface are oppositely arranged along a first preset direction; the brake assembly is arranged on the rotor and comprises a moving piece and a first friction part, the first friction part is provided with a first separation position separated from the magnetic steel and a first brake position adsorbed on the side surface of the magnetic steel, and the first friction part is arranged on the moving piece; the moving part is movably arranged to drive the first friction part to move between a first braking position and a first separation position.
Furthermore, the rotor is movably arranged along a second preset direction, the side surface of the magnetic steel comprises a first magnetic steel side surface and a second magnetic steel side surface which are oppositely arranged along a third preset direction, and the first friction part is matched with the first magnetic steel side surface so as to enable the first friction part to be adsorbed on the first magnetic steel side surface; or the first friction part is matched with the side surface of the second magnetic steel so that the first friction part is adsorbed on the side surface of the second magnetic steel; the second preset direction is perpendicular to the third preset direction.
Further, a first friction part of at least one brake component is used for being adsorbed on the side face of the first magnetic steel; and/or the first friction part of at least one brake component is used for being adsorbed on the side surface of the second magnetic steel.
Furthermore, the brake assembly also comprises a brake part and a fixed part, and the fixed part is connected with the rotor; the braking part is connected with the fixed part, and the braking part includes: an iron core; the winding is wound on the iron core; an armature; one end of the elastic component is connected with the fixed part, and the other end of the elastic component is connected with the armature; when the winding is in a power-on state, the armature is adsorbed on the iron core; when the winding is in a power-off state, the iron core releases the armature; wherein, the moving member is connected with armature to make armature drive moving member removal.
Furthermore, the elastic assembly comprises a plurality of elastic pieces, the elastic pieces are arranged at intervals around the circumference of the winding, one end of each elastic piece is connected with the fixed piece, and the other end of each elastic piece is connected with the armature.
Further, the brake assembly further comprises: and the protection piece is provided with an avoiding opening for avoiding the moving piece.
Furthermore, a guide groove is formed in the inner wall of the protection piece, a guide portion of the armature is matched with the guide groove, and the guide portion is arranged in the guide groove and movably arranged along the guide groove.
Further, the mover is movably disposed along a second preset direction; the first friction part is provided with a first sawtooth part, the side surface of the magnetic steel is provided with a second sawtooth part, the second sawtooth part is matched with the first sawtooth part, and the second sawtooth part is meshed with the first sawtooth part; a plurality of first sawteeth of the first sawteeth part are sequentially arranged along a second preset direction, and a plurality of second sawteeth of the second sawteeth part are sequentially arranged along the second preset direction.
Furthermore, the first saw teeth and the second saw teeth are triangular saw teeth; or the first saw tooth and the second saw tooth are both rectangular saw teeth.
Further, the moving member is movably disposed along a first preset direction.
Further, the braking component also comprises a second friction part, the second friction part is arranged on the moving part, the second friction part is provided with a second separation position separated from the stator mounting plate and a second braking position pressed on the stator mounting plate, and the second friction part is movably arranged between the second separation position and the second braking position under the driving of the moving part.
Furthermore, a rotating shaft is arranged on the rotor; the moving piece comprises a first moving part and a moving arm, and the first moving part is connected with the armature and movably arranged along a third preset direction; one end of the movable arm is connected with the first moving part, the other end of the movable arm is provided with a first friction part, and the movable arm is connected with the rotating shaft so that the movable arm rotates around the rotating shaft under the driving of the first moving part to drive the first friction part to move between the first separation position and the first braking position.
Furthermore, the number of the brake assemblies is multiple, the multiple brake assemblies comprise a first brake assembly and a second brake assembly, the first brake assembly and the second brake assembly are oppositely arranged along a third preset direction, and a fixing piece of the first brake assembly is connected with a fixing piece of the second brake assembly; the iron core of the first brake component and the iron core of the second brake component are integrally arranged, and the winding of the first brake component and the winding of the second brake component are integrally arranged; the fixing piece is connected with the winding and wound on the outer peripheral surface of the winding.
The linear motor structure comprises a rotor, a stator and a brake assembly, wherein the brake assembly is arranged on the rotor, a moving member of the brake assembly is connected with the rotor and movably arranged relative to the rotor, and the moving member is connected with a first friction part so as to drive the first friction part to move; when the linear motor main body operates, the first friction part is positioned at a first separation position under the action of the moving part, and the first friction part is separated from the magnetic steel at the moment; when the linear electric motor main part brakies, first friction portion moves to first braking position under the effect of moving member on, and at this moment, first friction portion is adsorbed in the magnet steel side, and the magnetic attraction of magnet steel provides great positive pressure for the braking. The linear motor structure fully utilizes the strong magnetic attraction force in the horizontal direction of the side surface of the magnetic steel, and provides large braking force for the main body of the linear motor through the matching of the first friction part and the magnetic steel; and the linear motor structure only needs to be provided with the brake assembly to be matched with the magnetic steel, so that an auxiliary structure is avoided being independently arranged, the magnetic force of the magnetic steel is fully utilized, and the complexity of a brake system is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic configuration of a first friction part of a first embodiment of a linear motor structure according to the present invention in a first braking position;
fig. 2 shows a schematic configuration of a first friction part of a first embodiment of a linear motor structure according to the present invention in a first separated position;
fig. 3 is a schematic structural view showing a partial structure of a first embodiment of a linear motor structure according to the present invention;
figure 4 shows a top view of a first embodiment of a linear motor structure according to the invention;
fig. 5 is a schematic view showing the structure of a first friction part in a first braking position according to a second embodiment of the structure of the linear motor of the present invention;
fig. 6 is a schematic view showing the structure of a first friction part in a first separated position according to a second embodiment of the structure of a linear motor of the present invention;
figure 7 shows a top view of a second embodiment of a linear motor structure according to the invention;
fig. 8 illustrates a structural view of a mover and a stator of a linear motor structure according to the present invention;
fig. 9 shows a schematic structural view of one embodiment of the first and second serrations (or the third and fourth serrations) of the linear motor structure according to the present invention;
fig. 10 shows a schematic structural view of another embodiment of the first and second serrations (or the third and fourth serrations) of the linear motor structure according to the present invention.
Wherein the figures include the following reference numerals:
10. a mover; 11. a mover end face; 12. a rotating shaft; 20. a stator; 21. a stator mounting plate; 211. a fourth serration; 22. magnetic steel; 221. a first magnetic steel side; 222. a second magnetic steel side; 23. end faces of the magnetic steel; 24. a second serration; 30. a brake assembly; 31. a moving member; 311. a first moving part; 312. a movable arm; 32. a first friction part; 321. a first serration; 33. a stopper; 331. an iron core; 332. a winding; 333. an armature; 334. an elastic component; 335. an elastic member; 34. a fixing member; 35. a protective member; 351. a guide groove; 36. a second friction portion; 361. and a third serration.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The present invention provides a linear motor structure, please refer to fig. 1 to 10, including: the linear motor comprises a linear motor body, a stator and a stator, wherein the linear motor body comprises a rotor 10 and a stator 20, and the rotor 10 is provided with a rotor end surface 11; the stator 20 comprises a stator mounting plate 21 and magnetic steel 22, the magnetic steel 22 is arranged on the stator mounting plate 21, the magnetic steel 22 is provided with a magnetic steel side surface and a magnetic steel end surface 23, and the magnetic steel end surface 23 and the mover end surface 11 are oppositely arranged along a first preset direction; the brake assembly 30, the brake assembly 30 is set up on the runner 10, the brake assembly 30 includes moving part 31 and first friction part 32, the first friction part 32 has the first separation position separated from magnet steel 22 and the first brake position absorbed on the side of magnet steel, the first friction part 32 is set up on the moving part 31; the moving member 31 is movably disposed to move the first friction portion 32 between the first braking position and the first separating position.
The linear motor structure of the invention includes the runner 10, the stator 20 and the brake assembly 30, the brake assembly 30 is set on the runner 10, the moving part 31 of the brake assembly 30 is connected with the runner 10 and movably set relative to the runner 10, the moving part 31 is connected with the first friction part 32 to drive the first friction part 32 to move; when the linear motor main body operates, the first friction part 32 is at a first separation position under the action of the moving part 31, and at the moment, the first friction part 32 is separated from the magnetic steel 22; when the linear electric motor main part brakies, first friction portion 32 moves to first braking position under the effect of moving member 31 on, at this moment, first friction portion 32 is adsorbed in the magnet steel side, and the magnetic attraction of magnet steel provides great positive pressure for the braking. The linear motor structure fully utilizes the strong magnetic attraction force in the horizontal direction of the side surface of the magnetic steel, and provides large braking force for the main body of the linear motor through the matching of the first friction part 32 and the magnetic steel; and the linear motor structure only needs to be provided with the brake assembly to be matched with the magnetic steel, so that an auxiliary structure is avoided being independently arranged, the magnetic force of the magnetic steel is fully utilized, and the complexity of a brake system is reduced.
In one embodiment, the moving member 31 is made of metal, for example, the moving member 31 is made of iron.
In this embodiment, the mover 10 is movably disposed along the second predetermined direction, the magnetic steel side surface includes a first magnetic steel side surface 221 and a second magnetic steel side surface 222 oppositely disposed along the third predetermined direction, and the first friction portion 32 is adapted to the first magnetic steel side surface 221, so that the first friction portion 32 is adsorbed on the first magnetic steel side surface 221; or, the first friction part 32 is matched with the second magnetic steel side face 222, so that the first friction part 32 is adsorbed on the second magnetic steel side face 222; the second preset direction is perpendicular to the third preset direction.
Specifically, any two of the first preset direction, the second preset direction and the third preset direction are perpendicular to each other.
In the present embodiment, the first friction portion 32 of at least one braking component 30 is used for being adsorbed on the first magnetic steel side surface 221; and/or the first friction part 32 of at least one brake assembly 30 is used for being adsorbed on the second magnetic steel side surface 222.
In a specific implementation, along the second preset direction, the mover 10 has a first mounting end face and a second mounting end face which are oppositely arranged; at least one brake assembly 30 is disposed on the first mounting end surface; and/or at least one brake assembly 30 is disposed on the second mounting end surface.
In specific implementations, the number of brake assemblies 30 is one, two, three, or four. In one embodiment, there are two braking assemblies 30, two braking assemblies 30 are both mounted on the first mounting end surface or the second mounting end surface, and the two braking assemblies 30 are oppositely disposed on two sides of the magnetic steel 22 along the third predetermined direction.
In this embodiment, the brake assembly 30 further includes a brake 33 and a fixing member 34, and the fixing member 34 is connected with the mover 10; the stopper 33 is connected to the fixing member 34, and the stopper 33 includes: an iron core 331; a winding 332, wherein the winding 332 is wound on the iron core 331; an armature 333; an elastic member 334, one end of the elastic member 334 is connected to the fixed member 34, and the other end of the elastic member 334 is connected to the armature 333; when the winding 332 is in the energized state, the armature 333 is attracted to the iron core 331; when the winding 332 is in the de-energized state, the core 331 releases the armature 333; wherein, the moving member 31 is connected with the armature 333, so that the armature 333 drives the moving member 31 to move.
Preferably, the spring assembly 334 includes a plurality of spring members 335, the plurality of spring members 335 being spaced circumferentially around the winding 332, one end of each spring member 335 being connected to the fixed member 34 and the other end of each spring member 335 being connected to the armature 333. Specifically, the elastic member 335 is a spring.
In this embodiment, the brake assembly 30 further includes: and a protection member 35, wherein the braking member 33 is arranged in the protection member 35, one end of the protection member 35 is connected with the fixed member 34, and the other end of the protection member 35 is provided with an avoiding opening for avoiding the moving member 31.
Preferably, the inner wall of the protection member 35 is provided with a guide groove 351, and the guide portion of the armature 333 is fitted into the guide groove 351, and the guide portion is disposed in the guide groove 351 and movably disposed along the guide groove 351. Preferably, the guide groove 351 and the guide portion are plural.
In the present embodiment, the mover 10 is movably disposed in the second preset direction; the first friction part 32 is provided with a first sawtooth part 321, the magnetic steel side surface is provided with a second sawtooth part 24, the second sawtooth part 24 is matched with the first sawtooth part 321, and the second sawtooth part 24 is meshed with the first sawtooth part 321; the first sawteeth of the first sawteeth portion 321 are sequentially arranged along a second preset direction, and the second sawteeth of the second sawteeth portion 24 are sequentially arranged along the second preset direction.
Specifically, the first saw teeth and the second saw teeth are triangular saw teeth; or, the first saw teeth and the second saw teeth are both rectangular saw teeth.
Specifically, the first friction portion 32 is a sheet-like structure.
In the first embodiment, as shown in fig. 1 to 4, the moving member 31 is movably disposed along a first preset direction. The center line of the core 331 and the center line of the winding 332 both extend along a first predetermined direction, and the elastic member 335 extends along the first predetermined direction.
In one embodiment, the fixing member 34 is a plate-shaped structure and the protecting member 35 is a tube-shaped structure.
In specific implementation, the braking assembly 30 further includes a second friction portion 36, the second friction portion 36 is disposed on the moving member 31, the second friction portion 36 has a second separation position separated from the stator mounting plate 21 and a second braking position pressed on the stator mounting plate 21, and the second friction portion 36 is movably disposed between the second separation position and the second braking position under the driving of the moving member 31. Due to the arrangement, the stator mounting plate is also used as a part of braking, an auxiliary supporting structure is omitted, the supporting function of the stator mounting plate is fully utilized, and the second friction part 36 is matched with the stator mounting plate to provide large braking force for the linear motor.
In a specific implementation, the second friction part 36 has a third sawtooth part 361, the stator mounting plate 21 has a fourth sawtooth part 211, the fourth sawtooth part 211 is matched with the third sawtooth part 361, and the fourth sawtooth part 211 is meshed with the third sawtooth part 361; the third saw teeth of the third saw tooth portion 361 are sequentially arranged along a second preset direction, and the fourth saw teeth of the fourth saw tooth portion 211 are sequentially arranged along the second preset direction.
Specifically, the third saw tooth and the fourth saw tooth are both triangular saw teeth; or, the third saw tooth and the fourth saw tooth are both rectangular saw teeth.
Specifically, the second friction portion 36 is a sheet-like structure.
Wherein the second friction portion 36 is disposed perpendicular to the first friction portion 32.
Specifically, when the winding 332 of the braking assembly 30 is energized, the armature 333 is attracted to drive the moving member 31 and the first and second friction portions 32 and 36 to retract upward, as shown in fig. 2. When the winding is de-energized, the moving member 31, the first friction portion 32 and the second friction portion 36 are ejected out by the elastic member 335 to contact with the stator, as shown in fig. 1. The moving member 31 is made of metal, and after the moving member is popped out under the action of the spring, the moving member 31, the first friction part 32 and the second friction part 36 are tightly adsorbed on the side surface of the magnetic steel under the action of strong magnetic force of the stator magnetic steel, the magnetic attraction of the magnetic steel provides large positive pressure for braking, and the braking assembly can generate large braking force due to the existence of the first friction part 32 on the interface. Meanwhile, in the vertical direction, the pressure is provided by a spring, and the braking force is synchronously generated under the action of the interface second friction part 36. This brake assembly 30 make full use of the powerful magnetic attraction of magnet steel side horizontal direction and the supporting role of stator mounting panel, cooperate by first friction portion 32, second friction portion 36, provide great brake force for linear electric motor.
Specifically, the second friction portion 36 is a sheet-like structure.
In the second embodiment, as shown in fig. 5 to 7, the mover 10 is provided with a rotary shaft 12; the moving member 31 includes a first moving portion 311 and a moving arm 312, the first moving portion 311 is connected to the armature 333 and is movably disposed along a third preset direction; one end of the movable arm 312 is connected to the first moving portion 311, the other end of the movable arm 312 is provided with a first friction portion 32, and the movable arm 312 is connected to the rotating shaft 12, so that the movable arm 312 is driven by the first moving portion 311 to rotate around the rotating shaft 12, and the first friction portion 32 is driven to move between the first separation position and the first braking position.
In specific implementation, the number of the brake assemblies 30 is multiple, the multiple brake assemblies 30 include a first brake assembly and a second brake assembly, the first brake assembly and the second brake assembly are oppositely arranged along a third preset direction, and the fixing member 34 of the first brake assembly is connected with the fixing member 34 of the second brake assembly; the iron core 331 of the first brake assembly and the iron core 331 of the second brake assembly are integrally arranged, and the winding 332 of the first brake assembly and the winding 332 of the second brake assembly are integrally arranged; the stator 34 is connected to the winding 332, and the stator 34 is wound around the outer circumferential surface of the winding 332. The fixing member 34 of the first brake assembly and the fixing member 34 of the second brake assembly are both ring-shaped structures and are integrated. Compared with the first embodiment, the embodiment has the advantage that the braking effect is better due to the clamping of the two braking components on the magnetic steel on the two sides of the magnetic steel.
In one embodiment, the protector 35 is a tubular structure, and the protector 35 is disposed around the outside of the elastic member 334. The center line of the protector 35, the center line of the fixing member 34, the center line of the core 331, and the center line of the winding 332 all extend in the third preset direction.
Specifically, the winding, the iron core, the armature, and the moving member 31 are disposed in a transverse direction, a set of long winding and long iron core is used, and the spring is divided into a left part and a right part, and is fixed in the middle by a fixing member. The first moving part is connected with the movable arm, a fixed point is arranged at the middle upper part of the movable arm and serves as a shaft, and a first friction part is arranged on the side face of the tail end of the movable arm. When the winding is electrified, the armature is attracted to drive the first moving part to move inwards, the first moving part is connected with the moving arm, the moving arm is opened, and the linear motor main body works normally, as shown in fig. 6. When the winding loses power, the armature is released and moves outwards under the action of the elastic force of the spring to drive the movable arms, so that the tail ends of the movable arms at two sides tightly hold the stator, as shown in fig. 5. The movable arm and the first friction part can be closely adsorbed on the side surface of the stator magnetic steel, the magnetic attraction of the magnetic steel provides larger positive pressure for braking, and larger braking force can be generated due to the existence of the side friction part at the interface.
According to the size of the motor, the surface of the first friction part and the surface of the second friction part can be selected to have different roughness, and the stator mounting plate side can be selected to have different surface treatment modes. When a large braking force is required, different surface forms can be selected, as shown in fig. 9 and 10.
This application utilizes magnet steel avris horizontal direction's magnetic force to design this linear electric motor structure to regard the stator mounting panel as one side braking vane, avoided setting up auxiliary structure alone, with magnet steel magnetic force make full use of, reduced braking system's complexity simultaneously.
The application solves the following technical problems: the braking system of the linear motor structure needs more additional auxiliary structures; the magnetic force in the horizontal direction at the side of the magnetic steel is not utilized; the parts of the braking system are more and complicated to install.
The application has the following beneficial effects: the complexity of the brake system is reduced; the magnetic force in the horizontal direction at the side of the magnetic steel is fully utilized, so that resource waste is avoided; the installation operation is simplified, and the cost is reduced.
The number of the brake assemblies and the surface forms of the first friction part and the second friction part can be selected according to the size of the linear motor.
In specific implementation, as shown in fig. 1, on the basis of being supported by the mover and the stator, the linear motor structure is composed of two brake assemblies 30, which are installed at the end of the mover and symmetrically distributed on two sides of the magnetic steel; specifically, the number of the braking assemblies 30 can be selected according to the size of the motor, the braking assemblies are distributed at two ends of the mover, the number of the braking assemblies is 1 to 4, and meanwhile, braking friction portions with different roughness and different friction portion surface forms can be selected according to requirements, as shown in fig. 9 and 10. The arrows in fig. 9 and 10 indicate the moving direction of the mover.
At present, the magnetic steel used by the linear motor is basically made of neodymium iron boron material, and the magnetic attraction force is strong, and the attraction force is equal to the magnetic steel volume multiplied by the density multiplied by the attraction force. The brake structure is only a single magnetic steel suction force, and the thickness of the brake structure along the rotor direction can be adjusted according to different motor sizes, so that the brake structure can cover a plurality of magnetic steels in a spanning manner, and a larger magnetic force can be obtained.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the linear motor structure of the invention includes the runner 10, the stator 20 and the brake assembly 30, the brake assembly 30 is set on the runner 10, the moving part 31 of the brake assembly 30 is connected with the runner 10 and movably set relative to the runner 10, the moving part 31 is connected with the first friction part 32 to drive the first friction part 32 to move; when the linear motor main body operates, the first friction part 32 is at a first separation position under the action of the moving part 31, and at the moment, the first friction part 32 is separated from the magnetic steel 22; when the linear electric motor main part brakies, first friction portion 32 moves to first braking position under the effect of moving member 31 on, at this moment, first friction portion 32 is adsorbed in the magnet steel side, and the magnetic attraction of magnet steel provides great positive pressure for the braking. The linear motor structure fully utilizes the strong magnetic attraction force in the horizontal direction of the side surface of the magnetic steel, and provides large braking force for the main body of the linear motor through the matching of the first friction part 32 and the magnetic steel; and the linear motor structure only needs to be provided with the brake assembly to be matched with the magnetic steel, so that an auxiliary structure is avoided being independently arranged, the magnetic force of the magnetic steel is fully utilized, and the complexity of a brake system is reduced.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A linear motor structure, comprising:
the linear motor comprises a linear motor body and a stator, wherein the linear motor body comprises a rotor (10) and a stator (20), and the rotor (10) is provided with a rotor end surface (11); the stator (20) comprises a stator mounting plate (21) and magnetic steel (22), the magnetic steel (22) is arranged on the stator mounting plate (21), the magnetic steel (22) is provided with a magnetic steel side surface and a magnetic steel end surface (23), and the magnetic steel end surface (23) and the rotor end surface (11) are arranged oppositely along a first preset direction;
the brake assembly (30) is arranged on the rotor (10), the brake assembly (30) comprises a moving member (31) and a first friction part (32), when the first friction part (32) is located at a first separation position, the first friction part (32) is separated from the magnetic steel (22), when the first friction part (32) is located at a first braking position, the first friction part (32) is adsorbed on the side surface of the magnetic steel, and the first friction part (32) is arranged on the moving member (31); the moving piece (31) is movably arranged to drive the first friction part (32) to switch between the first braking position and the first separation position;
the rotor (10) is movably arranged along a second preset direction, the side surface of the magnetic steel comprises a first magnetic steel side surface (221) and a second magnetic steel side surface (222) which are oppositely arranged along a third preset direction, and the first friction part (32) is matched with the first magnetic steel side surface (221) so that the first friction part (32) is adsorbed on the first magnetic steel side surface (221); or the first friction part (32) is matched with the second magnetic steel side surface (222) so that the first friction part (32) is adsorbed on the second magnetic steel side surface (222); and the second preset direction is vertical to the third preset direction.
2. A linear motor structure, according to claim 1, characterized in that said first friction portion (32) of at least one braking assembly (30) is adapted to be absorbed on said first magnetic steel side (221); and/or
The first friction part (32) of at least one brake component (30) is used for being adsorbed on the second magnetic steel side surface (222).
3. A linear motor structure according to claim 1, characterized in that the brake assembly (30) further comprises a brake member (33) and a fixing member (34), the fixing member (34) being connected with the mover (10); the braking member (33) is connected with the fixing member (34), and the braking member (33) comprises:
an iron core (331);
the winding (332), the said winding (332) is wound on the said iron core (331);
an armature (333);
an elastic component (334), one end of the elastic component (334) is connected with the fixed part (34), and the other end of the elastic component (334) is connected with the armature (333); when the winding (332) is in an electrified state, the armature (333) is adsorbed on the iron core (331); the core (331) releases the armature (333) when the winding (332) is in a de-energized state;
the moving part (31) is connected with the armature (333), so that the armature (333) drives the moving part (31) to move.
4. A linear motor structure according to claim 3, characterized in that the elastic member (334) includes a plurality of elastic members (335), the plurality of elastic members (335) are arranged at intervals around the circumference of the winding (332), one end of each elastic member (335) is connected to the fixed member (34), and the other end of each elastic member (335) is connected to the armature (333).
5. A linear motor structure according to claim 3, characterized in that the braking assembly (30) further comprises:
the brake piece (33) is arranged in the protection piece (35), one end of the protection piece (35) is connected with the fixing piece (34), and the other end of the protection piece (35) is provided with an avoiding opening used for avoiding the moving piece (31).
6. A linear motor structure according to claim 5, characterized in that the inner wall of the protection member (35) is provided with a guide groove (351), and the guide portion of the armature (333) is fitted into the guide groove (351), the guide portion being provided in the guide groove (351) and movably provided along the guide groove (351).
7. A linear motor arrangement according to claim 1, characterized in that the mover (10) is movably arranged in a second predetermined direction; the first friction part (32) is provided with a first sawtooth part (321), the magnetic steel side surface is provided with a second sawtooth part (24), the second sawtooth part (24) is matched with the first sawtooth part (321), and the second sawtooth part (24) is meshed with the first sawtooth part (321); the plurality of first sawteeth of the first sawteeth portion (321) are sequentially arranged along the second preset direction, and the plurality of second sawteeth of the second sawteeth portion (24) are sequentially arranged along the second preset direction.
8. The linear motor structure of claim 7, wherein the first saw tooth and the second saw tooth are triangular saw teeth; or the first saw teeth and the second saw teeth are both rectangular saw teeth.
9. The linear motor structure according to any one of claims 1 to 8, wherein the moving member (31) is movably provided in the first preset direction.
10. A linear motor structure according to claim 9, wherein the brake assembly (30) further includes a second friction portion (36), the second friction portion (36) is provided on the moving member (31), when the second friction portion (36) is located at a second separated position, the second friction portion (36) is separated from the stator mounting plate (21), when the second friction portion (36) is located at a second braking position, the second friction portion (36) is pressed against the stator mounting plate (21), and the second friction portion (36) is switched between the second separated position and the second braking position by being driven by the moving member (31).
11. A linear motor arrangement according to any of claims 3-6, characterized in that the mover (10) is provided with a rotary shaft (12); the moving piece (31) comprises a first moving part (311) and a moving arm (312), and the first moving part (311) is connected with the armature (333) and is movably arranged along a third preset direction; one end of the movable arm (312) is connected with the first moving part (311), the other end of the movable arm (312) is provided with the first friction part (32), the movable arm (312) is connected with the rotating shaft (12), so that the movable arm (312) is driven by the first moving part (311) to wind the rotating shaft (12) to rotate, and the first friction part (32) is driven to move between the first separation position and the first braking position.
12. The linear motor structure according to claim 11, wherein the plurality of brake assemblies (30) is provided, the plurality of brake assemblies (30) includes a first brake assembly and a second brake assembly, the first brake assembly and the second brake assembly are arranged opposite to each other along the third preset direction, and a fixing member (34) of the first brake assembly is connected with a fixing member (34) of the second brake assembly; the iron core (331) of the first brake component and the iron core (331) of the second brake component are integrally arranged, and the winding (332) of the first brake component and the winding (332) of the second brake component are integrally arranged;
the fixing piece (34) is connected with the winding (332), and the fixing piece (34) is wound on the outer peripheral surface of the winding (332).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219237.4A CN111277111B (en) | 2020-03-25 | 2020-03-25 | Linear motor structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010219237.4A CN111277111B (en) | 2020-03-25 | 2020-03-25 | Linear motor structure |
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| CN111277111B true CN111277111B (en) | 2021-06-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3916389B2 (en) * | 1999-09-30 | 2007-05-16 | 山洋電気株式会社 | Linear / rotary actuator |
| CN106276672B (en) * | 2015-06-03 | 2018-04-06 | 上海三菱电梯有限公司 | Elevator brake-releasing gear |
| US10454341B1 (en) * | 2016-11-30 | 2019-10-22 | X Development Llc | Progressive force electro-permanent magnets actuator |
| CN107733204B (en) * | 2017-10-30 | 2023-12-12 | 广州数控设备有限公司 | Linear motor module for robot splicing |
| CN208010807U (en) * | 2017-12-20 | 2018-10-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Brake and motor with it |
| CN209150905U (en) * | 2018-11-27 | 2019-07-23 | 上海微电子装备（集团）股份有限公司 | Brake apparatus for direct driving motor |
| CN109889012B (en) * | 2019-03-28 | 2023-12-15 | 深圳市赫瑞科技有限公司 | High-precision guide rail type linear motor |
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