Linear motor with iron core and novel structure

Abstract

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.

Description

Technical Field

[0001] The present application relates to the technical field of linear motors, and in particular to a linear motor with an iron core having a novel structure. Background Art

[0002] A linear motor is a transmission device that converts electrical energy directly into mechanical energy of linear motion without any intermediate conversion mechanism. A linear motor can be considered as a stator and rotor of a rotary motor cut radially and then unfolded into a plane. When a three-phase symmetrical sinusoidal current is injected into the coil winding of a linear motor, a traveling wave magnetic field is generated, which interacts with the static magnetic field generated by the permanent magnet and generates the thrust of the linear motor. Under the action of the thrust, the linear motor moves linearly.

[0003] Traditional linear motor types mainly include flat-type permanent magnet synchronous linear motors and U-shaped double-sided ironless permanent magnet synchronous linear motors. Flat-type permanent magnet synchronous linear motors will cause energy loss and dispersion due to end magnetic field distortion, which reduces the motor thrust. U-shaped double-sided ironless linear motors have the problem of insufficient thrust due to their ironless structure.

[0004] Therefore, both the flat-type permanent magnet synchronous linear motor and the U-shaped double-sided ironless permanent magnet synchronous linear motor have the problem of low motor thrust. Summary of the invention

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a new type of iron core linear motor.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions: A novel iron core linear motor, the novel iron core linear motor comprising: Base; Two sets of lower rails are symmetrically arranged on the base, and a stator is arranged between the two sets of lower rails; A mover moving platform is slidably connected to the two sets of lower rails, a pair of movers are symmetrically arranged on the inner walls of both sides of the mover moving platform, and an independent air gap is formed between the stator and the mover; The stator includes a stator core and a coil winding. The stator core is a bilaterally symmetrical tooth slot structure, including core teeth and core slots. The coil winding adopts an annular winding and is wound on the core teeth.

[0007] Optionally, the mover comprises: An iron yoke is fixed on the inner side wall of the mover moving platform, and a permanent magnet is bonded on the end surface of the iron yoke on one side away from the mover moving platform.

[0008] Optionally, two groups of lower slide seats are symmetrically provided at the bottom of the movable member moving platform, and the movable member moving platform is slidably connected with the two groups of lower slide rails through the two groups of lower slide seats.

[0009] Optionally, an upper slide rail is provided at the upper end of the middle iron yoke of the stator core, and an upper slide seat matching the upper slide rail is provided on the inner upper wall of the mover moving platform. The upper slide seat is slidably connected to the upper slide rail so that the mover moving platform spans the stator and makes a linear motion relative to the stator.

[0010] Optionally, a groove for installing the lower sliding rail is formed on the base, and the lower sliding rail is installed in the groove by a plurality of first fixing bolts.

[0011] Optionally, the upper slide rail is mounted on the upper end of the middle iron yoke of the stator core through a plurality of second fixing bolts.

[0012] Optionally, the lower sliding seat is mounted on the bottom of the mover moving platform through a plurality of third fixing bolts.

[0013] Optionally, the upper slide seat is mounted on the inner upper wall of the mover moving platform by means of a plurality of fourth fixing bolts.

[0014] Optionally, the iron yoke is mounted on the inner wall of the mover moving platform by means of a plurality of screws.

[0015] Beneficial effects of the present application: The coil winding of the present application adopts an annular winding. Compared with the stacked winding method of traditional motors, the advantages of annular winding are simple structure and compact winding arrangement. Due to the annular arrangement of the coil, the magnetic field is more concentrated, the thrust of the motor is increased, and the efficiency of the motor is greatly improved. The stator part and the mover part of the motor both adopt a bilaterally symmetrical structure. The stator part is located in the middle position of the mover part. The normal force of the left mover on the stator can offset the normal force of the right mover on the stator, so that the lateral normal force on the stator as a whole is zero, thereby improving the lateral stability of the system. Compared with traditional single-sided linear motors and U-shaped double-sided coreless linear motors, this motor has the advantages of high thrust density and large thrust.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0018] Figure 1 It is a front view of a linear motor with an iron core of a novel structure shown in an embodiment of the present application; Figure 2 is a top view of a linear motor with an iron core of a novel structure shown in an embodiment of the present application; Figure 3 It is a side view of a linear motor with an iron core of a novel structure shown in an embodiment of the present application; Figure 4 is a schematic structural diagram of a stator core shown in an embodiment of the present application; Figure 5 is a schematic diagram of the stator structure shown in an embodiment of the present application; Figure 6 It is a schematic diagram of the movable moving platform shown in the embodiment of the present application.

[0019] Figure numerals: 1. base; 2. stator; 3. mover; 4. mover moving platform; 5. lower slide rail; 6. upper slide rail; 7. lower slide seat; 8. upper slide seat; 9. iron yoke; 10. permanent magnet; 11. first fixing bolt; 12. second fixing bolt; 13. third fixing bolt; 14. fourth fixing bolt; 15. screw; 21. stator core; 22. coil winding; 31. left mover; 32. right mover; 211. core teeth; 222. core slots. DETAILED DESCRIPTION

[0020] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific situation.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0025] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0026] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0027] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the preferred embodiments of the present application will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technical personnel.

[0028] Embodiment 1:

[0029] See also Figures 1 to 4 , a novel structure of an iron core linear motor, the novel structure of the iron core linear motor comprising: Base 1; Two sets of lower rails 5 are symmetrically arranged on the base 1, and a stator 2 is arranged between the two sets of lower rails 5; A mover moving platform 4 is slidably connected to the two sets of lower rails 5, and a pair of movers 3 are symmetrically arranged on the inner walls of both sides of the mover moving platform 4, and an independent air gap is formed between the stator 2 and the movers 3; The stator 2 includes a stator core 21 and a coil winding 22 . The stator core 21 is a bilaterally symmetrical tooth slot structure, including core teeth 211 and core slots 222 . The coil winding 22 is an annular winding and is wound on the core teeth 211 .

[0030] Specifically, the mover 3 includes a left mover 31 and a right mover 32. The left mover 31 is arranged on one inner wall of the mover moving platform 4, and the right mover 32 is arranged on the other inner wall of the mover moving platform 4. The left mover 31 and the right mover 32 form a bilaterally symmetrical structure. The stator part and the mover part of the motor both adopt a bilaterally symmetrical structure. The stator part is located in the middle of the mover part. The normal force of the left mover 31 on the stator 2 can offset the normal force of the right mover 32 on the stator 2, so that the lateral normal force on the stator 2 as a whole is zero, that is, there is no normal force on the motor, which improves the lateral stability of the system.

[0031] An independent air gap is formed between the stator 2 and the mover 3. The independent air gap can reduce the magnetic resistance and allow the magnetic flux to pass through the air gap more smoothly, thereby improving the electromagnetic efficiency. The existence of the air gap provides a certain distance between the mover 3 and the stator 2, reducing the direct friction and contact between them, thereby enhancing the mechanical stability. This distance also helps to reduce the mechanical stress caused by vibration and impact and extend the service life of the motor. In addition, the independent air gap helps to improve the heat dissipation performance of the motor. Due to the existence of the air gap, heat can be more easily dissipated through air convection and radiation, which helps to reduce the operating temperature of the motor and improve thermal stability and reliability.

[0032] The design of the toroidal winding helps to generate a uniformly distributed magnetic field. A uniform magnetic field can more efficiently utilize electrical energy, which is converted into greater thrust. The structure of the toroidal winding is relatively compact, and the gap between the wires is small, which helps to reduce the leakage of the magnetic field and the loss of energy, allowing the motor to generate greater thrust at the same volume. In the toroidal winding, the current can be more evenly distributed in the winding, thereby reducing the impact of current density non-uniformity on the winding. This uniform current distribution helps to generate a more stable magnetic field and greater thrust. In addition, the design of the toroidal winding helps to reduce electromagnetic interference and crosstalk. Due to the annular arrangement of the coils, the mutual influence between adjacent coils is small, thereby reducing the impact of electromagnetic interference on thrust performance. And the toroidal winding is conducive to heat dissipation and insulation.

[0033] The two sets of lower slide rails 5 can carry and support the mover platform 4, ensuring that it can move smoothly on the predetermined track. When the mover platform 4 makes a linear motion relative to the base 1, the two sets of lower slide rails 5 guide and position the linear motion of the mover 3 and the mover platform 4 to improve the running accuracy and stability of the motor. In addition, the design of the slide rail connection between the mover platform 4 and the base 1 can reduce friction and wear, thereby extending the service life of the equipment, reducing energy loss and heat generation, and improving the running efficiency and stability of the motor.

[0034] In summary, the coil winding of the present application adopts an annular winding. Compared with the stacked winding method of traditional motors, the advantages of annular winding are simple structure and compact winding arrangement. Due to the annular arrangement of the coil, the magnetic field is more concentrated, the thrust of the motor is increased, and the efficiency of the motor is greatly improved. The stator part and the mover part of the motor both adopt a bilaterally symmetrical structure. The stator part is located in the middle position of the mover part. The normal force of the left mover 31 on the stator 2 can offset the normal force of the right mover 32 on the stator 2, so that the lateral normal force on the stator 2 as a whole is zero, thereby improving the lateral stability of the system. Compared with traditional single-sided linear motors and U-shaped double-sided coreless linear motors, this motor has the advantages of high thrust density and large thrust.

[0035] In addition, compared with the traditional single-sided linear motor and the U-shaped double-sided ironless linear motor, the linear motor of the present application also has the advantages of no normal force and a relatively simple structure.

[0036] Embodiment 2:

[0037] See also Figures 1 to 6 , based on the first embodiment, optionally, the mover 3 includes: An iron yoke 9 is fixed on the inner wall of the mover moving platform 4 , and a permanent magnet 10 is bonded to the end surface of the iron yoke 9 on the side away from the mover moving platform 4 .

[0038] Specifically, the coil winding of the stator part is passed through a three-phase symmetrical alternating current to generate a traveling wave magnetic field, which interacts with the magnetic field generated by the permanent magnet 10 of the mover part, so that the mover moving platform 4 can move linearly relative to the base 1. The permanent magnet 10 is bonded to the iron yoke 9 of the two inner side walls of the mover moving platform 4 to form a bilaterally symmetrical structure, and an independent air gap is formed between the stator 2 and the mover 3.

[0039] Optionally, two groups of lower slide seats 7 are symmetrically provided at the bottom of the mover moving platform 4 , and the mover moving platform 4 is slidably connected with the two groups of lower slide rails 5 via the two groups of lower slide seats 7 .

[0040] Specifically, the two groups of lower slide seats 7 are respectively matched with the two groups of lower slide rails 5. As a moving component on the lower slide rail 5, the lower slide seat 7 can perform precise linear motion along the lower slide rail 5. By setting the lower slide seat 7, the precise control and positioning of the mover moving platform 4 can be achieved, and the motor operation accuracy can be effectively improved. At the same time, the cooperation between the lower slide seat 7 and the lower slide rail 5 can provide a certain pre-tightening force, so that the contact surfaces are squeezed against each other to generate friction. This friction can effectively prevent the base 1 from loosening and reduce the possibility of the base 1 moving during operation, thereby improving the stability and safety of the system, and then ensuring the high-speed and high-precision operation of the motor.

[0041] Optionally, an upper slide rail 6 is provided at the upper end of the middle iron yoke of the stator core 21, and an upper slide seat 8 matching the upper slide rail 6 is provided on the inner upper wall of the mover moving platform 4. The upper slide seat 8 is slidably connected to the upper slide rail 6 so that the mover moving platform 4 spans the stator 2 and makes a linear motion relative to the stator 2.

[0042] Specifically, through the sliding connection between the upper slide seat 8 and the upper slide rail 6, the mover moving platform 4 is further supported, guided and positioned, thereby further improving the accuracy and stability of the movement.

[0043] Embodiment three:

[0044] See also Figure 2 Based on the above embodiment, optionally, a groove for installing the lower sliding rail 5 is opened on the base 1, and the lower sliding rail 5 is installed in the groove through a plurality of first fixing bolts 11.

[0045] Specifically, through the above arrangement, the connection effect between the base 1 and the two sets of lower slide rails 5 is increased, which facilitates the installation and disassembly of the two sets of lower slide rails 5 .

[0046] Optionally, the upper slide rail 6 is mounted on the upper end of the middle iron yoke of the stator core 21 through a plurality of second fixing bolts 12 .

[0047] Specifically, through the above arrangement, the connection effect between the stator core 21 and the upper slide rail 6 is increased, providing a better stable support effect for the mover moving platform 4 , and at the same time, facilitating the installation and disassembly of the upper slide rail 6 .

[0048] See also Figure 6 Optionally, the lower sliding seat 7 is mounted on the bottom of the mover moving platform 4 through a plurality of third fixing bolts 13 .

[0049] Specifically, through the above arrangement, the connection effect between the mover moving platform 4 and the two groups of lower slide seats 7 is increased, which facilitates the installation and disassembly of the two groups of lower slide seats 7.

[0050] Optionally, the upper slide seat 8 is mounted on the inner upper wall of the mover moving platform 4 by means of a plurality of fourth fixing bolts 14 .

[0051] Specifically, through the above arrangement, the connection effect between the mover moving platform 4 and the upper slide 8 is increased, and the installation and disassembly of the upper slide 8 is facilitated.

[0052] See also Figure 3 Optionally, the iron yoke 9 is mounted on the inner wall of the mover moving platform 4 by means of a plurality of screws 15 .

[0053] Specifically, through the above arrangement, the connection effect between the mover moving platform 4 and the left mover 31 and the right mover 32 is increased, which facilitates the installation and disassembly of the left mover 31 and the right mover 32 .

[0054] In addition, in this embodiment, in bolt connections and threaded connections, by adjusting the preload force and selecting suitable gasket materials, the impact of vibration and impact on the connection parts can be reduced to a certain extent, thereby achieving buffering and shock absorption effects, thereby improving the stability and accuracy of the motor operation.

[0055] It should be noted that structures and / or installation methods not described in detail in this application are known to those skilled in the art in combination with common knowledge and / or prior art, and are not the focus of disclosure in this application and will not be further elaborated herein.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application; the dimensions of the drawings are not related to the specific objects, and the dimensions of the objects can be changed arbitrarily.

Claims

1. A novel iron core linear motor, characterized in that: The novel structure of the iron core linear motor comprises: Base (1); Two sets of lower rails (5) are symmetrically arranged on the base (1), and a stator (2) is arranged between the two sets of lower rails (5); A mover moving platform (4) is slidably connected to the two sets of lower sliding rails (5), a pair of movers (3) are symmetrically arranged on the inner walls of both sides of the mover moving platform (4), and an independent air gap is formed between the stator (2) and the movers (3); The stator (2) comprises a stator core (21) and a coil winding (22); the stator core (21) is a bilaterally symmetrical tooth slot structure, comprising core teeth (211) and core slots (222); and the coil winding (22) is an annular winding and is wound on the core teeth (211); The mover (3) comprises: An iron yoke (9) fixed to the inner wall of the mover moving platform (4), a permanent magnet (10) being bonded to an end surface of the iron yoke (9) on a side away from the mover moving platform (4); The iron yoke (9) is mounted on the inner wall of the mover moving platform (4) via a plurality of screws (15).

2. The novel iron core linear motor according to claim 1, characterized in that: Two groups of lower slide seats (7) are symmetrically arranged at the bottom of the movable member moving platform (4), and the movable member moving platform (4) is slidably connected to the two groups of lower slide rails (5) via the two groups of lower slide seats (7).

3. The novel iron core linear motor according to claim 1, characterized in that: An upper slide rail (6) is provided at the upper end of the middle iron yoke of the stator iron core (21), and an upper slide seat (8) matching the upper slide rail (6) is provided on the inner upper wall of the mover moving platform (4). The upper slide seat (8) is slidably connected to the upper slide rail (6), so that the mover moving platform (4) spans across the stator (2) and performs linear motion relative to the stator (2).

4. The novel iron core linear motor according to claim 1, characterized in that: The base (1) is provided with a groove for mounting a lower sliding rail (5), and the lower sliding rail (5) is mounted in the groove via a plurality of first fixing bolts (11).

5. The novel iron core linear motor according to claim 3, characterized in that: The upper slide rail (6) is mounted on the upper end of the middle iron yoke of the stator core (21) via a plurality of second fixing bolts (12).

6. The novel iron core linear motor according to claim 2, characterized in that: The lower sliding seat (7) is mounted on the bottom of the mover moving platform (4) via a plurality of third fixing bolts (13).

7. The novel iron core linear motor according to claim 3, characterized in that: The upper slide seat (8) is mounted on the inner upper wall of the mover moving platform (4) via a plurality of fourth fixing bolts (14).

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