Linear motor

Abstract

The application relates to a linear motor used in cooperation with a direct current power supply, comprising a coil, a magnet and a magnetic conducting assembly, wherein the coil is used for electrically connecting with the direct current power supply; the magnet is at least one, the magnet is movably arranged in the coil, the magnet has a first magnetic pole facing the coil and a second magnetic pole opposite to the first magnetic pole; the first end of the magnetic conducting assembly is inserted into the coil, and the second end of the magnetic conducting assembly corresponds to the second magnetic pole of the magnet, and is used for forming a closed loop through the coil between the first magnetic pole and the second magnetic pole of the magnet, so that the magnet moves along the length direction of the coil. The linear motor has simple structure and convenient control, and the moving direction can be changed by changing the positive and negative poles of the power supply.

Description

Technical Field

[0001] This invention relates to the field of linear motor technology, and in particular to linear motors. Background Technology

[0002] A linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It can be viewed as a rotary electric motor cut radially and unfolded into a plane. Linear motors are also called linear actuators, linear motors, or pushrod motors. The most common types of linear motors are flat plate type, U-slot type, and tubular type.

[0003] Linear motors have a wide range of applications and a huge market. In industrial and automation applications, linear motors are widely used in mechatronics in mechanical equipment and machine tools due to their unique advantages. However, most current DC motors are brushed, which makes motor control complex and causes problems such as mechanical friction, noise, and electrical sparks. Summary of the Invention

[0004] Therefore, it is necessary to provide a linear motor to address the above-mentioned technical problems. This linear motor has a simple structure, is easy to control, and can change the direction of motion by changing the positive and negative terminals of the power supply.

[0005] A linear motor for use with a DC power supply, comprising:

[0006] A coil, the coil being used for electrical connection to the DC power supply;

[0007] At least one magnet, movably disposed on the coil, the magnet having a first magnetic pole facing the coil and a second magnetic pole opposite in polarity to the first magnetic pole; and

[0008] A magnetic guide assembly, wherein a first end of the magnetic guide assembly is inserted into the coil and a second end of the magnetic guide assembly corresponds to the second magnetic pole of the magnet, for forming a closed loop through the coil between the first magnetic pole and the second magnetic pole of the magnet, so that the magnet can move along the length direction of the coil.

[0009] In the above embodiment, the first end of the magnetically conductive component is inserted into the coil, and the second end of the magnetically conductive component corresponds to the second magnetic pole of the magnet, forming a closed loop of magnetic field lines passing through the coil between the first and second magnetic poles of the magnet. When the coil is connected to a DC power supply, and the magnetic field lines of each magnet move from the first magnetic pole towards the second magnetic pole, the current-carrying coil in the magnetic field experiences an Ampere force, driving the magnet to move along the length of the coil. It should be noted that the direction of the Ampere force can be determined by the left-hand rule: the left palm faces the direction of magnetic flow, the fingertips point in the direction of the current, and the thumb points in the direction of the Ampere force. Furthermore, the direction of the current can be changed by altering the polarity of the power supply, thereby changing the direction of motion and achieving reciprocating motion.

[0010] In one embodiment, the magnetically conductive assembly includes a first magnetically conductive element wound with the coil and a second magnetically conductive element fixedly connected to the second magnetic pole of the magnet, the second magnetically conductive element being magnetically slidably attached to the first magnetically conductive element.

[0011] With this configuration, the magnet is mounted on one side of the second magnetic conductor, which is slidably connected to the first magnetic conductor. This connection allows the second magnetic conductor to move as the magnet moves along the length of the coil. Furthermore, the second magnetic conductor is magnetically connected to the first magnetic conductor, thereby creating a closed loop through the coil between the first and second magnetic poles of the magnet.

[0012] In one embodiment, the first magnetic conductive element includes an iron core on which the coil is wound, a base plate magnetically connected to the iron core and the second magnetic conductive element, and a guide rail fixed to the base plate along the length of the coil, wherein the second magnetic conductive element is slidably engaged with the guide rail.

[0013] With this configuration, the second magnetic conductor slides in conjunction with the guide rail, and is used to drive the second magnetic conductor to move when the magnet moves along the length of the coil. The base plate is magnetically connected to the iron core and the second magnetic conductor, respectively, resulting in good magnetic conductivity.

[0014] In one embodiment, the iron core is arranged along the length direction of the base plate, and the iron core includes a winding portion for winding the coil and a support portion connected to the winding portion, the support portion being fixed to the base plate.

[0015] With this configuration, the winding part of the iron core is arranged along the length of the base plate to wind the coil. One end of the support part is fixed to the base plate, and the other end of the support part is connected to the winding part. This is used to transmit the magnetic field lines of the first magnetic pole of the magnet passing through the coil to the base plate and the second magnetic conductor through the iron core, so that a complete closed loop is formed between the first magnetic pole and the second magnetic pole.

[0016] In one embodiment, two of the support portions extend from both ends of the winding portion to the base plate, and the coil is located between the two support portions.

[0017] With this configuration, the support extends from both ends of the winding part to the base plate, providing good fixation. Furthermore, the support guides the magnetic field lines to the base plate, resulting in good magnetic conductivity.

[0018] In one embodiment, the second magnetic conductor includes a magnetically conductive side plate that slides with the guide rail, and the second magnetic pole of the magnet is in close contact with the magnetically conductive side plate.

[0019] With this configuration, the magnet is fixed on the magnetically conductive side plate, and the second magnetic pole of the magnet is in close contact with the magnetically conductive side plate. When the current-carrying coil in the magnetic field is driven to move by the Ampere force, the magnet will drive the magnetically conductive side plate, which is in sliding cooperation with the guide rail, to move along the length of the coil.

[0020] In one embodiment, the second magnetic conductive element further includes a connector, which is mounted on the magnetic conductive side plate and slides in cooperation with the guide rail.

[0021] With this configuration, one end of the connector is connected to the magnetic side plate, and the other end of the connector is slidably connected to the guide rail, resulting in a good sliding fit.

[0022] In one embodiment, to improve the stability of the movement process, there are two magnets, and the two magnets are symmetrically arranged on both sides of the coil, with a gap between the magnets and the coil.

[0023] This configuration, with two magnets symmetrically positioned on either side of the coil and having the same polarity on opposite sides, significantly improves the stability of the movement. Furthermore, the gap between the magnets and the coil allows for smoother movement. In one embodiment, the linear motor also includes a non-magnetic component that overlaps the two magnetic side plates, with a gap between the non-magnetic component and the coil.

[0024] With this configuration, the non-magnetic component overlaps the top of the two magnetically conductive side plates, blocking the transmission of magnetic field lines and ensuring that the direction of the Ampere force is consistent, resulting in better movement of the magnet.

[0025] In one embodiment, the linear motor further includes a position sensor mounted on the magnetic conductive assembly.

[0026] With this setup, the position sensor is installed on the magnetic guide assembly to sense the movement of the magnet and perform accurate positioning.

[0027] The beneficial effects of this invention are as follows:

[0028] The first end of the magnetically conductive component is inserted into the coil, and the second end of the component corresponds to the second magnetic pole of the magnet, forming a closed loop of magnetic field lines passing through the coil between the first and second magnetic poles of the magnet. Thus, when the coil is connected to a DC power supply, the current-carrying coil in the magnetic field experiences an Ampere force, which drives the magnet to move along the length of the coil. Furthermore, the direction of the magnet's movement can be changed by altering the direction of the current in the power supply. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the linear motor of the present invention;

[0030] Figure 2 for Figure 1 The working principle diagram of a linear motor.

[0031] Explanation of icon numbers:

[0032] 1. Coil; 2. Magnet; 21. First magnetic pole; 22. Second magnetic pole; 3. Magnetic conductive assembly; 31. First magnetic conductive component; 311. Iron core; 3111. Winding part; 3112. Support part; 312. Base plate; 313. Guide rail; 32. Second magnetic conductive component; 321. Magnetic conductive side plate; 322. Connector; 4. Non-magnetic conductive component. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] Existing rotary DC motors use brushes, commutators, or electronic circuits to commutate or change the phase of the winding input current. As a result, there is relative mechanical friction, making it difficult to avoid obvious problems such as noise and electrical sparks.

[0040] In existing brushed DC motors, the windings and commutator rotate during operation, while the main magnetic poles (stator) and brushes do not rotate. DC power is applied to the rotor windings via the brushes, and the alternating direction of the winding current changes with the rotation of the commutator and the position of its associated brushes. When the brushed DC motor rotor rotates to 90°, the two winding sides are at the physical neutral plane of the magnetic field, and the brushes are not in contact with the commutator; no current flows through the windings, and torque disappears. Due to mechanical inertia, the brushed DC motor rotor will continue rotating beyond 90° to 180°, at which point current will flow through the windings again. According to the left-hand rule, the direction of the force on the two windings remains counterclockwise, and the rotor continues to rotate counterclockwise. The use of brushes and commutators presents problems such as relative mechanical friction, high noise levels, and a tendency to generate electrical sparks.

[0041] Based on this, this embodiment provides a linear motor with a simple structure. It eliminates the problems of brushes and commutators found in the original DC motor, and does not require a driver for electronic commutation. It is easy to control and changes the direction and speed of motion by changing the positive and negative terminals of the power supply and the magnitude of the current.

[0042] Specifically, please refer to Figure 1 and Figure 2 An embodiment of the present invention provides a linear motor including a coil 1, a magnet 2, and a magnetic guiding assembly 3. The coil 1 is used for electrical connection to a DC power supply. At least one magnet 2 is provided, movably disposed on the coil 1. Each magnet 2 has a first magnetic pole 21 facing the coil 1 and a second magnetic pole 22 with the opposite polarity to the first magnetic pole 21. The first end of the magnetic guiding assembly 3 is inserted into the coil 1, and the second end of the magnetic guiding assembly 3 corresponds to the second magnetic pole 22 of the magnet 2, forming a closed loop through the coil 1 between the first magnetic pole 21 and the second magnetic pole 22 of the magnet 2, so that the magnet 2 can move along the length of the coil 1. In this embodiment, the first magnetic pole 21 is the N pole, the second magnetic pole 22 is the S pole, and the external magnetic field lines of the magnet 2 extend from the N pole to the S pole.

[0043] In the above embodiment, the first end of the magnetic conductive component 3 is inserted into the coil 1, and the second end of the magnetic conductive component 3 corresponds to the second magnetic pole 22 of the magnet 2, for forming a closed loop of magnetic field lines passing through the coil 1 between the first magnetic pole 21 and the second magnetic pole 22 of the magnet 2. The closed loop of the magnetic field lines of the magnet 2 is coordinated with the current of the coil 1. When the coil 1 is connected to a DC power supply, since the external magnetic field lines of each magnet 2 are from the first magnetic pole 21 toward the second magnetic pole 22, the energized coil 1 is in a magnetic field, causing the magnet 2 to be subjected to the Ampere force. The magnet 2 is driven by the Ampere force to move along the length direction of the coil 1.

[0044] Alternatively, in some embodiments, the first magnetic pole 21 may be the S pole, and the corresponding second magnetic pole 22 may be the N pole, which would result in the direction of the Ampere force on the magnet 2 being opposite to the Ampere force in the above embodiments.

[0045] It's important to know that the direction of the Ampere force can be determined by the left-hand rule: with the left palm facing the direction of the magnetic poles, the fingertips pointing in the direction of the current, and the thumb pointing in the direction of the Ampere force. Thus, by changing the polarity of the power source, the direction of the current can be changed, thereby changing the direction of motion and achieving reciprocating motion.

[0046] In this embodiment, the first magnetic pole 21 is the N pole and the second magnetic pole 22 is the S pole, which will not be described again below. Furthermore, if the DC power supply provides a clockwise current (e.g.... Figure 2 As shown in S1), since the external magnetic field lines of magnet 2 move from the first magnetic pole 21 towards the second magnetic pole 22, when the current flows through segment ab of coil 1 (as shown in S1), Figure 2 As shown), this will generate an Ambe force in the first direction (such as...). Figure 1 and Figure 2 As shown in X1); if the DC power supply provides a counterclockwise current (such as... Figure 2 As shown in S2), since the external magnetic field lines of magnet 2 move from the first magnetic pole 21 towards the second magnetic pole 22, when the current flows through segment ab of coil 1 (as shown in S2), Figure 2 As shown), this will generate an Ambe force in the second direction (such as...). Figure 1 and Figure 2 (As shown in X2).

[0047] In this embodiment, coil 1 is connected to a DC power supply. Changing the positive and negative terminals of the power supply changes the direction of motion, eliminating the need for brushes and commutators. This also eliminates the need for a driver for electronic commutation. The brushless motor, by removing the brushes, directly eliminates the electrical sparks generated during the operation of a brushed motor. This significantly reduces interference from electrical sparks on remote control wireless equipment, making it particularly suitable for explosive environments with excellent explosion-proof performance. Furthermore, the absence of brushes greatly reduces friction during operation, resulting in smoother operation and significantly lower noise, a substantial advantage for model stability. It also offers advantages such as longer lifespan and lower maintenance costs. Moreover, the elimination of Hall effect position sensors reduces costs, simplifies motor manufacturing, enhances anti-interference capabilities, and makes it suitable for various working environments.

[0048] In some embodiments, the magnetic conductive component 3 includes a first magnetic conductive element 31 on which the coil 1 is wound and a second magnetic conductive element 32 fixedly connected to the second magnetic pole 22 of the magnet 2, wherein the second magnetic conductive element 32 is magnetically slidably connected to the first magnetic conductive element 31.

[0049] With this configuration, since the magnet 2 is mounted on one side of the second magnetic conductor 32, and the second magnetic conductor 32 is slidably connected to the first magnetic conductor 31, it drives the second magnetic conductor 32 to move when the magnet 2 moves along the length of the coil 1. Furthermore, the second magnetic conductor 32 is magnetically connected to the first magnetic conductor 31, thereby enabling a closed loop through the coil 1 between the first magnetic pole 21 and the second magnetic pole 22 of the magnet 2, which, in conjunction with the energized coil 1, generates an Ampere force that propels the magnet 2 to move.

[0050] In some embodiments, the first magnetic conductor 31 includes an iron core 311 on which the coil 1 is wound, a base plate 312 magnetically connected to the iron core 311 and the second magnetic conductor 32, and a guide rail 313 fixed to the base plate 312 along the length of the coil 1. The second magnetic conductor 32 is slidably engaged with the guide rail 313. This arrangement allows the second magnetic conductor 32 to move along the guide rail 313 when the magnet 2 moves along the length of the coil 1. The base plate 312 is magnetically connected to both the iron core 311 and the second magnetic conductor 32, providing good magnetic conductivity. This allows the magnetic field lines passing through the coil 1 to be transmitted from the iron core 311 to the base plate 312, and then to the second magnetic conductor 32, thus creating a closed loop of magnetic field lines in the magnet 2.

[0051] In some embodiments, the iron core 311 is arranged along the length of the base plate 312. The iron core 311 includes a winding portion 3111 for winding the coil 1 and a support portion 3112 connected to the winding portion 3111. The support portion 3112 is fixed to the base plate 312. With this arrangement, the winding portion 3111 of the iron core 311 is arranged along the length of the base plate 312 for winding the coil 1, resulting in good winding effect. One end of the support portion 3112 is fixed to the base plate 312, and the other end of the support portion 3112 is connected to the winding portion 3111. This allows the magnetic field lines of the first magnetic pole 21 of the magnet 2 passing through the coil 1 to be transmitted through the iron core 311 to the base plate 312 and the second magnetic conductor 32, so that a complete closed loop is formed between the first magnetic pole 21 and the second magnetic pole 22 (see [reference]). Figure 1 The direction of magnetic field lines flow is well-designed.

[0052] In this embodiment, preferably, the two support portions 3112 extend from both ends of the winding portion 3111 to the base plate 312, and the coil 1 is located between the two support portions 3112. This arrangement ensures good fixation as the support portions 3112 extend from both ends of the winding portion 3111 to the base plate 312, and also provides good magnetic conductivity by guiding the magnetic field lines to the base plate 312.

[0053] As an alternative implementation, the above embodiment illustrates a specific location for the support portion 3112 to achieve a magnetic connection between the winding portion 3111 and the base plate 312. It should be noted that the location of the support portion 3112 is not limited to both ends of the winding portion 3111; it can also be located in the middle of the winding portion 3111, as long as it serves both a supporting and magnetically conductive function.

[0054] Specifically, the second magnetic conductive element 32 includes a magnetically conductive side plate 321 that slides with the guide rail 313, and the second magnetic pole 22 of the magnet 2 is in close contact with the magnetically conductive side plate 321. With this configuration, the magnet 2 is fixed on the magnetically conductive side plate 321, and the second magnetic pole 22 of the magnet 2 is in close contact with the magnetically conductive side plate 321. When the current-carrying coil 1 in the magnetic field is driven by the Ampere force to move the magnet 2, the magnet 2 will drive the magnetically conductive side plate 321 that slides with the guide rail 313 to move along the length direction of the coil 1.

[0055] Furthermore, the second magnetic conductive element 32 also includes a connector 322, which is mounted on the magnetic conductive side plate 321 and slidably engages with the guide rail 313. This arrangement ensures that one end of the connector 322 is connected to the magnetic conductive side plate 321, and the other end is slidably connected to the guide rail 313, resulting in a good sliding engagement. Specifically, one end of the connector 322 can be fixedly connected to the magnetic conductive side plate 321, or detachably connected to it, as long as the magnetic conductive side plate 321 is slidably connected to the guide rail 313.

[0056] In this embodiment, to improve the stability of the movement process, two magnets 2 are used, and the two magnets 2 are symmetrically arranged on both sides of the coil 1, with a gap between the magnets 2 and the coil 1. This arrangement, with two magnets 2 and their opposite sides having the same polarity, greatly improves the stability of the movement process. Simultaneously, the gap between the magnets 2 and the coil 1 makes the movement of the magnets 2 smoother. Specifically, since the opposite sides of the two magnets 2 have the same polarity, and the external magnetic field lines of the magnets 2 flow from the first magnetic pole 21 towards the second magnetic pole 22 (see [link to specific magnetic field line flow diagram] for details),... Figure 1 and Figure 2 When the current flows through segment ab of coil 1 (e.g. Figure 2 As shown), one of the magnets 2 will generate an Ampere force in the first direction (as shown). Figure 1 and Figure 2 As shown in X1); when the current flows through segment cd of coil 1 (as shown in X1); Figure 2 As shown), another magnet 2 will generate an Ampere force in the first direction (as shown). Figure 1 and Figure 2 As shown in X1, the two Ampere forces are in the same direction and can be accumulated to act together on the second magnetic conductor 32, resulting in a good movement effect.

[0057] The linear motor in this embodiment also includes a non-magnetic component 4, which overlaps the two magnetic side plates 321, and there is a gap between the non-magnetic component 4 and the coil 1. With this configuration, the non-magnetic component 4 overlaps the top of the two magnetic side plates 321 to block the transmission of magnetic field lines, so as to ensure that the direction of the Ampere force is consistent, and the movement effect of the magnet 2 is better.

[0058] It needs to be explained that because the non-magnetic component 4 is attached to the two magnetically conductive side plates 321, the magnetic field lines of the magnet 2 entering the second magnetic pole 22 from the first magnetic pole 21 cannot pass over the coil 1. This arrangement avoids the current flowing through segment bc of the coil 1 (such as...). Figure 2 As shown), an Ambe force appears in a second direction opposite to the Ambe force in the first direction (as shown). Figure 1 and Figure 2 As shown in X2), the opposite Ambe forces will cancel each other out, affecting the movement effect.

[0059] Furthermore, since the winding portion 3111 of the iron core 311 passes through the coil 1 and is connected to the base plate 312 via the support portion 3112, the magnetic field lines flowing from the first magnetic pole 21 of the magnet 2 enter the coil 1, are transmitted through the winding portion 3111 to the support portion 3112 and the base plate 312, and are transmitted through the guide rail 313 to the second magnetic conductor 32, finally entering the second magnetic pole 22 of the magnet 2, thus realizing a closed loop of magnetic field lines. When the current flows through the da segment of the coil 1 (e.g. Figure 2 As shown), since the iron core 311 transmits the magnetic field lines to the base plate 312, the magnetic field lines do not pass through the energized coil segment 1da (as shown). Figure 2 As shown), this causes the current to flow through section da of coil 1 (as shown). Figure 2 As shown in the figure, no Ampere force is generated, thus magnet 2 is always subjected to an Ampere force in the same direction.

[0060] Furthermore, a gap exists between the coil 1 wound around the winding portion 3111 and the base plate 312. This prevents the magnetic field lines from directly connecting to the base plate 312 through the bottom of the coil 1, thus avoiding the occurrence of an Ampere force opposite to the Ampere force in the first direction (such as...). Figure 1 and Figure 2 (As shown in X2), it affects the movement effect.

[0061] In some embodiments, a gap exists between the magnet 2 and the coil 1. This arrangement, with the gap between the magnet 2 and the coil 1, allows for smoother movement of the magnet 2, requiring only an Ampere force (e.g., in the first direction) in the first direction. Figure 1 and Figure 2 As shown in X1, movement can be achieved if the frictional resistance on guide rail 313 is greater than that on guide rail 313.

[0062] In some embodiments, the linear motor further includes a position sensor (not shown), which is mounted on the magnetic guide assembly 3. This configuration allows the position sensor to sense the movement of the magnet 2 and perform accurate positioning.

[0063] The beneficial effects of this invention are as follows:

[0064] The first end of the magnetically conductive component 3 is inserted into the coil 1, and the second end of the magnetically conductive component 3 corresponds to the second magnetic pole 22 of the magnet 2, forming a closed loop of magnetic field lines passing through the coil 1 between the first magnetic pole 21 and the second magnetic pole 22 of the magnet 2. Thus, when the coil 1 is connected to a DC power supply, the current-carrying coil 1 in the magnetic field is subjected to an Ampere force, and the magnet 2 is driven by this Ampere force to move along the length of the coil 1. Furthermore, the direction of movement of the magnet 2 can be changed by altering the direction of the current in the power supply.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A linear motor for use with a direct current power supply, characterized by, The linear motor comprises: a coil electrically connected to the DC power supply; at least one magnet movably arranged in the coil, the magnet having a first magnetic pole facing the coil and a second magnetic pole opposite to the first magnetic pole and arranged away from the coil; a magnetic conducting assembly having a first end inserted into the coil and a second end corresponding to the second magnetic pole of the magnet, for forming a closed loop through the coil between the first magnetic pole and the second magnetic pole of the magnet to move the magnet along the length direction of the coil, the magnetic conducting assembly comprising a first magnetic conducting member wound with the coil and a second magnetic conducting member fixedly connected with the second magnetic pole of the magnet and slidably connected with the first magnetic conducting member; the linear motor further comprises a non-magnetic conducting member overlapped on the top of the second magnetic conducting member. The first magnetic conducting member comprises a core wound with the coil, a bottom plate magnetically connected with the core and the second magnetic conducting member, and a guide rail fixedly arranged on the bottom plate along the length direction of the coil, and the second magnetic conducting member is slidably connected with the guide rail.

2. The linear motor of claim 1, wherein The core is arranged along the length direction of the bottom plate, and the core comprises a winding portion for winding the coil and a support portion connected with the winding portion, and the support portion is fixedly connected with the bottom plate.

3. The linear motor of claim 2, wherein Two support portions extend from both ends of the winding portion to the bottom plate, and the coil is located between the two support portions.

4. The linear motor of claim 3, wherein The second magnetic conducting member comprises a magnetic conducting side plate slidably connected with the guide rail, and the second magnetic pole of the magnet is tightly arranged on the magnetic conducting side plate.

5. The linear motor of claim 2, wherein The second magnetic conducting member further comprises a connecting member arranged on the magnetic conducting side plate and slidably connected with the guide rail.

6. The linear motor of claim 5, wherein The number of the magnets is two, and the two magnets are symmetrically arranged on both sides of the coil, and there is a gap between the magnets and the coil.

7. Linear motor according to claim 5 or 6, characterized in that The non-magnetic conducting member is overlapped on the two magnetic conducting side plates, and there is a gap between the non-magnetic conducting member and the coil.

8. The linear motor of claim 7, wherein The linear motor further comprises a position sensor arranged on the magnetic conducting assembly.

9. The linear motor according to any one of claims 1 to 6, characterized in that, ​

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