Linear motor and spindle device

Abstract

The utility model relates to a kind of linear motor and main shaft device, comprising: stator and mover, two mutually independent stator parallelly arranged to form sliding channel, stator surface is equipped with magnetic part, magnetic part is located at the both sides of sliding channel, sliding channel is equipped with mover, magnetic part and mover have gap and generate thrust by magnetic field interaction, so that stator and mover relatively move.The utility model can generate larger thrust in smaller space, and linear motor structure is more compact.

Description

Technical Field

[0001] This utility model relates to the field of linear motor technology, and in particular to a linear motor and spindle device. Background Technology

[0002] A linear motor is a device that directly converts electrical energy into linear mechanical energy. Its core components include a mover and a stator. The mover generates a magnetic field by being energized, which interacts with the magnetic field of the stator to achieve linear motion; the stator generates a stable magnetic field, providing the basis for the mover's motion. When linear motors are used in machining spindles of mechanical equipment, they enable the spindle to perform precise linear motion. Commonly used drive types include iron-core linear motors, voice coil motors, or cylindrical motors. However, their structure is relatively complex, and when high thrust is required, their size is large and their cost is high. Utility Model Content

[0003] One objective of this invention is to solve the existing technical problems and provide a linear motor that can increase thrust within a smaller space.

[0004] Another objective of this invention is to provide a spindle device that can be combined with a linear motor, thereby simplifying the structure and reducing costs.

[0005] To achieve the objectives of this utility model, the embodiments of this utility model adopt the following technical solutions:

[0006] A linear motor includes a stator and a mover. Two independently arranged stators are arranged in parallel to form a sliding channel. The surface of the stator is provided with a magnetic part, which is located on both sides of the sliding channel. The mover is provided in the sliding channel. There is a gap between the magnetic part and the mover, and they interact with each other through a magnetic field to generate thrust, causing the stator and the mover to move relative to each other.

[0007] In some embodiments, a positioning mechanism is provided between the stator and the mover. The positioning mechanism includes a first positioning hole and a second positioning hole provided with corresponding positions. The first positioning hole is provided on the stator and the second positioning hole is provided on the mover. During positioning, the positioning is maintained by a positioning pin inserted into the first and second positioning holes.

[0008] In some embodiments, the second positioning hole is disposed on both sides of the mover, and the first positioning hole is disposed on the upper surface of the two stators;

[0009] And / or, the two stators are identical stators.

[0010] In some embodiments, the mover includes a mounting portion and a magnetic portion disposed on one side of the mounting portion, the magnetic portion being located in a sliding channel, and the width of the mounting portion being greater than the width of the sliding channel.

[0011] In some embodiments, the stator includes a fixed plate, a magnetic part is attached to the fixed plate, and two magnetic parts are respectively disposed opposite to a first side and a second side of the magnetic part, with the first and second sides located on both sides of the magnetic part.

[0012] In some embodiments, the mounting portion is provided with second positioning holes at both ends, and both the mounting portion and the magnetic portion are cuboids;

[0013] And / or, the mounting portion is provided with an electrical connection portion.

[0014] A spindle device includes a linear motor, a stator mounted on a spindle clamp or a base plate, a mover mounted on the base plate or the spindle clamp, and a sliding connection between the base plate and the spindle clamp.

[0015] In some embodiments, the mover is disposed in the first mounting hole of the spindle clamp, the stator is disposed in the second mounting hole of the base plate, the second mounting hole is disposed opposite to the first mounting hole, the sliding channel is connected to the second mounting hole, and the magnetic part of the mover is inserted into the sliding channel.

[0016] In some embodiments, the mounting portion of the mover covers the first mounting hole, and the mounting portion and the spindle clamp shield the stator and the sliding channel.

[0017] In some embodiments, the stator is mounted on the spindle clamp, the mover is mounted on the base plate, and the magnetic part of the mover passes through the first mounting hole of the spindle clamp and is inserted into the sliding channel of the two stators.

[0018] This utility model has the following main advantages:

[0019] (1) By using two stators respectively positioned on both sides of the mover, the motor can generate a large thrust within a small space, making the linear motor structure more compact; (2) By setting a positioning mechanism, the stator and mover can be accurately installed, thereby maintaining the accuracy of the gap between the two sides of the mover; (3) The mover and stator can be connected to the spindle clamp and base plate of the spindle device respectively, and the installation positions of the stator and mover can be exchanged as needed, expanding the scope of application. Other advantages of the present invention are described in the specific embodiments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the mover and stator of a linear motor provided in Embodiment 1 of this utility model.

[0022] Figure 2 This is a schematic diagram of the mover and stator provided in Embodiment 1 of this utility model.

[0023] Figure 3 This is a schematic diagram of the mover provided in Embodiment 1 of this utility model.

[0024] Figure 4 This is another schematic diagram of the mover provided in Embodiment 1 of this utility model.

[0025] Figure 5 This is a schematic diagram of the stator provided in Embodiment 1 of this utility model.

[0026] Figure 6 This is a schematic diagram of the spindle device provided in Embodiment 2 of this utility model.

[0027] Figure 7 This is a schematic diagram of the base plate provided in Embodiment 2 of this utility model.

[0028] Figure 8 This is another schematic diagram of the spindle device provided in Embodiment 2 of this utility model.

[0029] Figure 9 This is a utility model Figure 8 A schematic diagram of the BB section.

[0030] Figure 10 This is a schematic diagram of the spindle device provided in Embodiment 3 of this utility model.

[0031] Figure 11 This is a schematic diagram of the spindle clamp provided in Embodiment 3 of this utility model.

[0032] In the attached image:

[0033] 11. Spindle clamp; 12. Base plate; 13. Linear guide rail; 100. Stator; 101. First positioning hole; 110. Magnetic part; 111. First mounting hole; 120. Clearance; 121. Second mounting hole; 130. Fixing plate; 200. Mover; 201. Second positioning hole; 210. Mounting part; 211. Side; 220. Magnetic part; 221. First side; 222. Second side; 240. Conductive part; 250. Cooling pipe; 300. Sliding channel. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0035] In this embodiment, "several" and "more than" refer to two or more. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] <Example 1>

[0038] like Figures 1 to 5As shown, this embodiment provides a linear motor including a stator 100 and a mover 200. The stator 100 and the mover 200 interact with each other through a magnetic field, enabling them to generate linear motion relative to each other. This embodiment has two stators 100, which, compared to the existing single stator configuration, allows the linear motor to generate greater thrust. The two independently arranged stators 100 are arranged in parallel to form a sliding channel 300, which is a linear channel along the Z-axis. A magnetic part 110 is provided on the surface of the stator 100 to generate a magnetic field. In this embodiment, the magnetic part 110 is a magnet, but other existing magnetic materials can also be used. The magnetic part 110 is disposed on the surface of the stator 100, allowing it to be closer to the mover 200 and facilitating installation and replacement. The magnetic part 110 is located on both sides of the sliding channel 300, keeping the magnetic field in the sliding channel 300 balanced. The mover 200 is provided in the sliding channel 300, with the magnetic part 110 located on the left and right sides of the mover 200. A gap 120 exists between the magnetic part 110 and the mover 200, which is the distance between the two opposing surfaces of the magnetic part 110 and the mover 200. Gaps exist on both sides of the mover 200 and between each of the two magnetic parts 110, and these gaps are equal on both sides. The size of the gap 120 affects the performance of the linear motor. A reasonable gap setting can improve the efficiency and stability of the motor, but gaps that are too small or too large will negatively impact the motor's performance. In this embodiment, the gap 120 is 1.2 mm. The two stators 100 are identical and symmetrically arranged on both sides of the mover, making the magnetic field more balanced. The magnetic part 110 and the mover 200 generate thrust through magnetic field interaction, causing the stators 100 and the mover 200 to move relative to each other. Through the above technical solution, by fixing the two stators to the left and right sides of the mover respectively, the linear motor can generate a larger thrust within the same space, resulting in a more compact structure and reduced production costs.

[0039] Furthermore, a positioning mechanism is provided between the stator 100 and the mover 200 to ensure the positional accuracy of the stator 100 and the mover 200 during installation. The positioning mechanism includes a first positioning hole 101 and a second positioning hole 201, which are coaxially arranged during installation. The first positioning hole 101 is located on the stator 100, and the second positioning hole 201 is located on the mover 200. During positioning, a positioning pin is inserted into the first and second positioning holes to maintain the positioning and keep their relative positions stable, avoiding deviations in the gap 120. The positioning pin is a temporary tooling and is removed after installation. After the stator 100 and the mover 200 are installed in place, the positioning pin is removed to complete the installation. Specifically, the second positioning holes 201 are located on both sides of the mover, with the two second positioning holes 201 being diagonally opposite each other, which ensures that the mover remains stable in the front, back, left, and right directions during positioning. The first positioning hole 101 is provided on the upper surface of the two stators 100, so that the first positioning hole 101 can be coaxially arranged with the second positioning hole 201 during positioning. The number and position of the first positioning holes 101 on each stator correspond to the second positioning holes. During positioning, the positioning pin is inserted from the second positioning hole 201 into the first positioning hole 101 to connect the stator and the mover, and fix the relative position between the stator and the mover. Then, the stator and the mover are fixed in their respective installation positions by screws, and then the positioning pin is removed.

[0040] Furthermore, the mover 200 includes a mounting portion 210 and a magnetic portion 220 disposed on one side of the mounting portion 210. The mounting portion 210 has mounting holes for fixing the mover. The magnetic portion 220 is located in the sliding channel 300 and is used to accommodate components such as the mover core. The width of the mounting portion 210 is greater than the width of the sliding channel 300, and the mover 200 is approximately T-shaped, so that the mounting portion 210 can cover the sliding channel 300, preventing the sliding channel 300 from being exposed and preventing dust and impurities from entering the sliding channel 300. Both the mounting portion 210 and the magnetic portion 220 are cuboids, which can reduce the size compared to a cylindrical linear motor. The second positioning hole 201 is disposed at both ends of the mounting portion 210, so that the second positioning hole 201 can penetrate the mounting portion, facilitating the insertion of the positioning pin. The mounting portion 220 is further provided with a conductive portion 240 and a cooling pipe 250. The conductive portion 240 is connected to an external power source, enabling the mover 200 to be energized. The cooling pipe 250 introduces and discharges coolant into the magnetic portion 220, cooling the iron core, coil, etc., within the magnetic portion 220. The width of the sliding channel 300 is the distance between the two magnetic portions in the X direction, and the width of the mounting portion 210 is the distance between the two side surfaces 211 of the mounting portion. The stator 100 includes a fixing plate 130, with the magnetic portion 110 attached to the fixing plate 130. The fixing plate 130 has mounting holes for fixing the fixing plate 130 in place. The fixing plate 130 is a cuboid. The two magnetic portions 110 are respectively positioned opposite to the first side surface 221 and the second side surface 222 of the magnetic portion 220. The first and second side surfaces are located on opposite sides of the magnetic portion 220 and are parallel to each other.

[0041] <Example 2>

[0042] In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0043] like Figures 6 to 9As shown, compared to Embodiment 1, this embodiment provides a spindle device 1, commonly used in machining equipment. Its function is to support the cutting tool or workpiece and achieve rotational motion through motor drive, thereby completing machining tasks such as drilling, milling, and cutting. This embodiment uses a PCB drilling machine spindle device as an example for explanation. The spindle device 1 of this embodiment is vertically arranged along the Z-axis direction. It includes a linear motor, the mover 200 of which is connected to the spindle clamp 11. The spindle clamp 11 is used to fix the spindle, and the cutting tool is connected to the spindle. Driven by the spindle, the cutting tool can be raised and lowered by the reciprocating motion of the spindle clamp 11 in the Z-axis direction, thereby drilling holes in the PCB below the spindle. The stator 100 of the linear motor is connected to the base plate 12, which is connected to the main body of the drilling machine and fixedly arranged. The base plate 12 and the spindle clamp 11 are slidably connected, allowing the spindle clamp 11 to slide relative to the base plate 12 in the Z-axis direction. Specifically, the stator 100 is disposed in the second mounting hole 121 of the base plate 12, and the two stators 12 are arranged perpendicularly to the base plate 12 at intervals. The magnetic part 220 of the mover 200 is inserted into the sliding channel 300 between the two stators 12. The mover 200 contains an iron core, and the surface of the stator 100 is equipped with magnets. When the mover 200 is energized, based on the Lorentz force, the magnetic field generated by the energized mover 200 interacts with the magnetic field generated by the magnets to generate a thrust, thus causing relative motion between the mover 200 and the stator 100. Since the stator 100 is fixed, the interaction of forces allows the mover 200 to move. The base plate and the spindle clamp are connected by a linear guide rail 13, allowing the spindle clamp 11 to slide up and down along the Z-axis relative to the base plate 12. The mover 200 is connected to the spindle clamp 11, so the movement of the mover 200 relative to the stator 100 after energization can drive the spindle clamp 11 to move up and down relative to the base plate 12.

[0044] Specifically, the mover 200 is disposed in the first mounting hole 111 of the spindle clamp 11, which penetrates the front and rear surfaces of the spindle clamp 11. The stator 100 is disposed in the second mounting hole 121 of the base plate 12, which is opposite to the first mounting hole 111. The sliding channel 300 communicates with the second mounting hole 121, and the magnetic part 220 of the mover 200 is inserted into the sliding channel 300. The mounting part 210 of the mover 200 covers the first mounting hole 111. The mounting part 210 and the spindle clamp 11 shield the stator 100 and the sliding channel 300, thereby protecting the stator 100 and the sliding channel 300 and reducing the entry of impurities into the sliding channel 300 and the gap 120.

[0045] <Example 3>

[0046] In this embodiment, the parts that are the same as in Embodiments 1 and 2 are given the same reference numerals, and the same text descriptions are omitted.

[0047] like Figures 10 to 11As shown, compared to Embodiment 2, this embodiment provides a spindle device 1 with the distinguishing feature that the stator 100 and the mover 200 are interchanged. In this embodiment, the stator 100 is mounted on the spindle clamp 11, and the mover 200 is mounted on the base plate 12. Specifically, the stator 100 is mounted in the first mounting hole 111 of the spindle clamp 11, and the sliding channel 300 formed by the two stators 100 communicates with the first mounting hole 111. The magnetic part 220 of the mover 200 passes through the first mounting hole 111 from the rear and enters the sliding channel 300. When the mover 200 is energized, based on the Lorentz force and the law of electromagnetic induction, the magnetic field generated by the energized mover interacts with the magnetic field generated by the magnet to produce a thrust, thus causing relative motion between the mover and the stator. Since the mover 200 is fixed, the interaction of forces can cause the stator 100 to move, allowing the spindle clamp 11 to slide up and down relative to the base plate 12. The stator 100 is connected to the spindle clamp 11. Therefore, when energized, the movement of the stator relative to the mover can drive the spindle clamp to move up and down relative to the base plate.

[0048] This embodiment uses a fixed moving part and a moving stator to reduce wear and breakage of the cables on the moving part of the motor due to movement, and facilitates installation and maintenance.

[0049] In the above embodiments one to three, during the working process, depending on the different working environments, some of the technical implementation methods of embodiments one to three can be combined or replaced.

[0050] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A linear motor, characterized in that, include: The stator and mover are two independently arranged stators that are parallel to each other to form a sliding channel. The surface of the stator is provided with a magnetic part, which is located on both sides of the sliding channel. The mover is arranged in the sliding channel. There is a gap between the magnetic part and the mover, and they generate a thrust through the interaction of the magnetic field, which causes the stator and the mover to move relative to each other. A positioning mechanism is provided between the stator and the mover. The positioning mechanism includes a first positioning hole and a second positioning hole that are provided in a corresponding manner. The first positioning hole is provided on the stator, and the second positioning hole is provided on the mover. During positioning, the positioning is maintained by a positioning pin inserted in the first and second positioning holes.

2. The linear motor according to claim 1, characterized in that, The second positioning hole is provided on both sides of the mover, and the first positioning hole is provided on the upper surface of the two stators; and / or, the two stators are identical stators.

3. The linear motor according to claim 1 or 2, characterized in that, The mover includes a mounting part and a magnetic part disposed on one side of the mounting part. The magnetic part is located in a sliding channel, and the width of the mounting part is greater than the width of the sliding channel.

4. The linear motor according to claim 3, characterized in that, The stator includes a fixed plate, a magnetic part is attached to the fixed plate, and two magnetic parts are respectively disposed opposite to the first side and the second side of the magnetic part, with the first and second sides located on both sides of the magnetic part.

5. The linear motor according to claim 4, characterized in that, The mounting part is provided with second positioning holes at both ends, and both the mounting part and the magnetic part are cuboids; and / or, the mounting part is provided with an electrical connection part.

6. A spindle device, characterized in that, The linear motor includes any one of claims 1 to 5, wherein the stator is disposed on the spindle clamp or the base plate, the mover is disposed on the base plate or the spindle clamp, and the base plate and the spindle clamp are slidably connected.

7. The spindle assembly according to claim 6, characterized in that, The mover is installed in the first mounting hole of the spindle clamp, and the stator is installed in the second mounting hole of the base plate. The second mounting hole is opposite to the first mounting hole, and the sliding channel is connected to the second mounting hole. The magnetic part of the mover is inserted into the sliding channel.

8. The spindle assembly according to claim 7, characterized in that, The mounting part of the mover covers the first mounting hole, and the mounting part and the spindle clamp block the stator and the sliding channel.

9. The spindle assembly according to claim 6, characterized in that, The stator is mounted on the spindle clamp, and the mover is mounted on the base plate. The magnetic part of the mover passes through the first mounting hole of the spindle clamp and is inserted into the sliding channel of the two stators.

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