Linear motor

Abstract

The application provides a linear motor, comprising a transmission assembly and a driving assembly, the transmission assembly comprises a support, a movable element, a mover, a linear bearing and an optical axis, the movable element and the mover are fixedly connected, the movable element is movably connected through the linear bearing and the optical axis, and the optical axis is connected with the support; the driving assembly comprises a stator, the stator is used for generating a magnetic field, and the mover can drive the movable element to move along the optical axis under the action of the magnetic field. The linear motor provided by the application connects the movable element through the linear bearing and the optical axis, so that the movement of the movable element is more smooth, the economy and stability are considered, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a linear motor. Background Technology

[0002] A linear motor is a device that directly converts electrical energy into linear motion mechanical energy. In related technologies, linear motors achieve linear motion by setting a slider to slide along a slide rail. The assembly of linear motors is complex and the manufacturing cost is relatively high. Summary of the Invention

[0003] The main technical problem addressed by this application is to provide a linear motor to improve the production efficiency of linear motors.

[0004] One embodiment of this application provides a linear motor, including: The transmission assembly includes a bracket, a movable component, a mover, a linear bearing, and an optical shaft. The movable component and the mover are fixedly connected. The movable component is movably connected to the optical shaft via the linear bearing. The optical shaft is connected to the bracket. A drive assembly includes a stator for generating a magnetic field, and a mover capable of driving the movable component to move along the optical axis under the action of the magnetic field.

[0005] According to one embodiment of this application, the stator is used to generate an alternating magnetic field, and the mover can drive the movable component to reciprocate relative to the support under the action of the alternating magnetic field.

[0006] According to one embodiment of this application, the transmission assembly further includes a limiting member, which is fixedly connected to the movable member. The limiting member is used to restrict the relative movement of the linear bearing and the movable member in the length direction of the optical axis.

[0007] According to one embodiment of this application, the movable member is provided with a mounting part, the mounting part is provided with a mounting hole, the linear bearing is inserted into the mounting hole, the limiting member is provided with a receiving groove, the mounting part is inserted into the receiving groove, and the opposite ends of the linear bearing are respectively connected to two oppositely arranged side walls of the receiving groove.

[0008] According to one embodiment of this application, the sidewall is provided with an insertion hole, the cross-sectional area of ​​the insertion hole is smaller than the cross-sectional area of ​​the mounting hole, and the optical axis is inserted into the insertion hole and the mounting hole.

[0009] According to one embodiment of this application, the limiting member is provided with a first fixing hole, the movable member is provided with a second fixing hole, the moving element includes a transmission seat and a magnet fixedly connected, the transmission seat is provided with a third fixing hole, and the transmission assembly further includes a first bolt, which is inserted into the first fixing hole, the second fixing hole and the third fixing hole to fix the limiting member, the movable member and the transmission seat relative to each other.

[0010] According to one embodiment of this application, the bracket includes a main body and two first connecting parts. The two first connecting parts are respectively connected to opposite ends of the main body. The main body is located on the side of the movable member away from the stator. One end of the first connecting part is connected to the main body, and the other end extends toward the stator. The optical axis is connected between the two first connecting parts.

[0011] According to one embodiment of this application, the transmission assembly further includes an elastic element, the movable element is at least partially located between the two first connecting portions, the elastic element is connected between the movable element and the first connecting portions, and the elastic element is arranged around the optical axis.

[0012] According to one embodiment of this application, the bracket further includes two second connecting portions, which are respectively connected to opposite sides of the main body. One end of each second connecting portion is connected to the main body, and the other end extends toward the stator. The second connecting portions are fixedly connected to the stator.

[0013] According to one embodiment of this application, the drive assembly further includes a fixed seat and a second bolt. The stator is disposed on the side of the fixed seat near the movable part. The fixed seat is also provided with a positioning part on the side near the movable part. The positioning part is provided with a first positioning hole, and the second connecting part is provided with a second positioning hole. The second bolt is inserted into the first positioning hole and the second positioning hole to fix the bracket and the fixed seat relative to each other.

[0014] The linear motor provided in this application has moving parts connected by linear bearings and optical shafts, which makes the movement of moving parts smoother and more fluid, taking into account both economy and stability, and helps to simplify the assembly process and improve production efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a schematic diagram of the structure of an embodiment of the linear motor of this application; Figure 2 yes Figure 1 The diagram shows the exploded structure of the linear motor. Figure 3 yes Figure 1 A cross-sectional schematic diagram of the linear motor shown. Figure 4 yes Figure 1 A cross-sectional view of the linear motor from another angle; Figure 5 yes Figure 1 A schematic diagram of part of the structure of the linear motor shown. Figure 6 yes Figure 5 A cross-sectional schematic diagram of a portion of the linear motor shown. Figure 7 yes Figure 5 The diagram shows an exploded structural diagram of a portion of the linear motor. Figure 8 yes Figure 1 A schematic diagram of the moving parts of the linear motor shown. Figure 9 yes Figure 1 The diagram shows the structural design of the support frame for the linear motor.

[0017] The attached diagram lists the components represented by each number as follows: Transmission assembly 10, bracket 110, second positioning hole 1101, clearance opening 1102, main body 111, first connecting part 112, second connecting part 113, connecting section 114, movable part 120, mounting hole 1201, second fixing hole 1202, mounting part 121, second fixing part 122, mover 130, third fixing hole 1301, transmission seat 131, magnet 132, linear bearing 140, optical axis 150, limiting part 160, receiving groove 1601, insertion hole 1602, first fixing hole 1603, side wall 161, first fixing part 162, first bolt 170, elastic element 180, drive assembly 20, fixing seat 210, first positioning hole 2101, positioning part 211, stator 212, second bolt 220, coil frame 230. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0019] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] This application provides a linear motor, such as... Figures 1 to 3 As shown, the linear motor includes a transmission assembly 10 and a drive assembly 20. The transmission assembly 10 includes a bracket 110, a movable part 120, a mover 130, a linear bearing 140, and an optical axis 150. The movable part 120 and the mover 130 are fixedly connected, and the movable part 120 is movably connected to the optical axis 150 through the linear bearing 140. The optical axis 150 is connected to the bracket 110. The drive assembly 20 includes a stator 212, which is used to generate a magnetic field. The mover 130 can drive the movable part 120 to move along the optical axis 150 under the action of the magnetic field.

[0022] Linear modules, also known as Cartesian robots or linear slides, are automation upgrade units for linear guides and ball screw linear transmission mechanisms. Linear modules can achieve linear and curvilinear motion of loads through the combination of various units, making automation of light loads more flexible and positioning more precise. Linear motors are a type of linear module; a linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. A linear motor can be viewed as a rotary motor radially cut and unfolded into a plane. Existing linear motor modules generally include a slider and a guide rail. The linear motor in this application uses a positioning transmission structure combining a linear bearing 140 and an optical shaft 150, directly eliminating the reliance on costly sliders and guide rails. This design adjustment not only significantly reduces the overall hardware cost, but the cooperation between the linear bearing 140 and the optical shaft 150 also reduces contact friction during transmission, effectively avoiding the jamming problem that easily occurs with traditional sliders, making the linear motor run more smoothly, and balancing economy and practicality.

[0023] In some embodiments, the linear bearing 140 achieves low-resistance motion through rolling friction, and adopts a point contact method between the bearing ball and the shaft, which has the characteristics of low friction and high precision.

[0024] In some embodiments, both the transmission component 10 and the drive component 20 can be modularly designed. The transmission component 10 and the drive component 20 can be assembled separately, and then the two modules are connected to form a linear motor. This makes the linear motor structural layout more reasonable, simplifies the assembly process, and improves assembly efficiency. In designing the linear motor transmission method, this application fully considers the efficiency during actual large-scale production and the physical characteristics of linear motor motion. The linear transmission part is structurally disassembled, and the design comprehensively considers multiple aspects such as fixing methods, limit design, and selection of structural components. This achieves a more reasonable force distribution method and greatly reduces installation difficulty. This means that under the same driving force, less friction needs to be overcome, reducing energy loss and heat accumulation caused by friction, and achieving relatively efficient energy conversion and motion control. This improves the production efficiency and stability of the linear motor.

[0025] In some embodiments, the stator 212 generates an alternating magnetic field, and the mover 130 is able to drive the movable member 120 to reciprocate relative to the support 110 under the action of the alternating magnetic field. The movable member 120 can be docked to the final force application target, and the linear motor can be used in products such as fascia guns that require short-stroke, high-frequency reciprocating motion.

[0026] In some embodiments, the stator 212 is circumferentially surrounded by coils, which can be supplied with alternating current to form an alternating magnetic field.

[0027] In some embodiments, the linear motor can rely on the continuous commutation of the DC power output from the battery and its flow into the coil. The magnetic field generated by the coil and the magnetic field of the moving part are "repelled by like poles and attracted by opposite poles", which drives the moving part 120 to reciprocate.

[0028] In some other embodiments, the linear motor can be used to move a workpiece. In one operation, a positive direct current is applied to the coil, and the movable part 120 moves from one end of the optical axis 150 to the other end. In another operation, a reverse direct current is applied to the coil, and the movable part 120 moves in the opposite direction back to its original position.

[0029] In some embodiments, the transmission assembly 10 further includes an elastic element 180, which is connected between the movable element 120 and the support 110. When the movable element 120 reciprocates, the elastic element 180 can provide a reverse elastic restoring force, allowing the movable element 120 to return to its initial position, ensuring the continuity of the linear motor's movement and making the linear motor's operation more stable.

[0030] In some embodiments, the elastic element 180 is a spring, and the elastic element 180 abuts between the movable element 120 and the bracket 110.

[0031] In some embodiments, such as Figures 5 to 8 As shown, the transmission assembly 10 also includes a limiting member 160, which is fixedly connected to the movable member 120. The limiting member 160 is used to restrict the relative movement of the linear bearing 140 and the movable member 120 in the length direction of the optical axis 150, so that the linear bearing 140 cannot disengage from the movable member 120.

[0032] In some embodiments, the movable member 120 is provided with a mounting portion 121, the mounting portion 121 is provided with a mounting hole 1201, the linear bearing 140 is inserted into the mounting hole 1201, the limiting member 160 is provided with a receiving groove 1601, the mounting portion 121 is inserted into the receiving groove 1601, and the opposite ends of the linear bearing 140 are respectively connected to the two oppositely arranged side walls 161 of the receiving groove 1601.

[0033] In some embodiments, the outer ring size of the linear bearing 140 is adapted to the size of the mounting hole 1201, so that the linear bearing 140 can be inserted into the mounting hole 1201, and the outer ring of the linear bearing 140 can fit against the inner wall of the mounting hole 1201. The sidewall 161 of the receiving groove 1601 can cover at least a portion of the mounting hole 1201, so that the linear bearing 140 is completely received in the mounting hole 1201 and cannot be dislodged from the mounting hole 1201. One end of the linear bearing 140 is connected to one of the sidewalls 161, and the other end of the linear bearing 140 is connected to the other sidewall 161, so that the linear bearing 140 and the movable member 120 are relatively fixed. When the movable member 120 reciprocates relative to the bracket 110, the linear bearing 140 will not wobble, thus improving the stability of the linear motor operation.

[0034] In some embodiments, the sidewall 161 is provided with a socket 1602, the cross-sectional area of ​​the socket 1602 is smaller than the cross-sectional area of ​​the mounting hole 1201, and the optical axis 150 is inserted into the socket 1602 and the mounting hole 1201.

[0035] In some embodiments, the cross-sectional area of ​​the insertion hole 1602 is equal to or slightly larger than the cross-sectional area of ​​the inner ring of the linear bearing 140, and the optical shaft 150 is inserted into the insertion hole 1602 and the inner ring of the linear bearing 140, and the bearing ball of the inner ring of the linear bearing 140 and the optical shaft 150 are in rolling connection.

[0036] In some embodiments, the limiting member 160 is provided with a first fixing hole 1603, the movable member 120 is provided with a second fixing hole 1202, the mover 130 includes a transmission seat 131 and a magnet 132 fixedly connected, the transmission seat 131 is provided with a third fixing hole 1301, and the linear motor also includes a first bolt 170, which is inserted into the first fixing hole 1603, the second fixing hole 1202 and the third fixing hole 1301 to fix the limiting member 160, the movable member 120 and the transmission seat 131 relative to each other.

[0037] In some embodiments, the linear bearing 140 is precisely embedded in the mounting hole 1201, ensuring that the overall length of the linear bearing 140 perfectly matches the depth of the mounting hole 1201. After the linear bearing 140 is placed in the mounting hole 1201, the limiting member 160 is placed on the mounting part 121, so that the side wall 161 of the limiting member 160 is tightly fitted with the two end faces of the linear bearing 140. The axial displacement of the linear bearing 140 is restricted by the structural constraint of the limiting member 160, preventing it from moving during operation. Finally, the first bolt 170 is used to tighten the pre-set screw holes of the limiting member 160, the movable member 120, and the transmission seat 131 in sequence. The pre-tightening force of the first bolt 170 firmly connects the limiting member 160, the movable member 120, and the transmission seat 131 into a whole.

[0038] In some embodiments, such as Figure 2 As shown, magnet 132 is an N52 strong magnet to ensure the normal operation of the electromagnetic effect. There can be one or more magnets 132. Specifically, there are two magnets 132.

[0039] In some embodiments, the drive assembly 20 further includes a coil frame 230, which has a through hole in which the stator 212 is inserted, and a coil is circumferentially surrounded by the coil frame 230.

[0040] In some embodiments, the transmission seat 131 is located on the side of the magnet 132 away from the stator 212, and the transmission seat 131 can be a magnetic yoke.

[0041] In some embodiments, the limiting member 160 is provided with two first fixing portions 162, and each first fixing portion 162 is connected to one of two sidewalls 161. One end of the first fixing portion 162 is connected to the sidewall 161, and the other end extends away from the linear bearing 140. The movable member 120 is provided with a second fixing portion 122, and both sides of the mounting portion 121 are connected to the second fixing portion 122. One end of the second fixing portion 122 is connected to the mounting portion 121, and the other end extends away from the linear bearing 140. A first fixing hole 1603 is provided in the first fixing portion 162, and a second fixing hole 1202 is provided in the second fixing portion 122. The transmission seat 131, the second fixing portion 122, and the first fixing portion 162 are stacked sequentially in a direction away from the magnet 132.

[0042] In some embodiments, the number of first bolts 170 is four, and the four first bolts 170 are distributed around the mounting portion 121.

[0043] In some embodiments, such as Figure 9 As shown, the bracket 110 includes a main body 111 and two first connecting parts 112. The two first connecting parts 112 are respectively connected to opposite ends of the main body 111. The main body 111 is located on the side of the movable member 120 away from the stator 212. One end of the first connecting part 112 is connected to the main body 111, and the other end extends toward the stator 212. The optical axis 150 is connected between the two first connecting parts 112.

[0044] In some embodiments, the movable member 120 is at least partially located between the two first connecting portions 112, and the elastic member 180 is connected between the movable member 120 and the first connecting portions 112, with the elastic member 180 arranged around the optical axis 150. The two first connecting portions 112 not only provide a stable mounting reference for the movable member 120, ensuring that the movable member 120 does not shift during operation, but also assist in positioning the elastic member 180, preventing lateral movement of the spring when it is stretched or contracted under force.

[0045] In some embodiments, the mounting part 121 is disposed between the two first connecting parts 112, and there are two linear bearings 140, two mounting holes 1201, and two optical axes 150. The two linear bearings 140 are respectively inserted into the two mounting holes 1201, and the two optical axes 150 are respectively connected to the two linear bearings 140.

[0046] In some other embodiments, the number of linear bearings 140 may be one or more, for example, the number of linear bearings 140 may be 1, 3, 4, 6, etc. The number of mounting holes 1201 and optical axes 150 is the same as the number of linear bearings 140.

[0047] In some embodiments, such as Figure 4 As shown, each linear bearing 140 has an elastic element 180 at both ends. One end of the elastic element 180 abuts against the side wall 161 of the limiting member 160, and the other end abuts against the first connecting part 112.

[0048] In some embodiments, the bracket 110 and the stator 212 are fixedly connected, and the mover 130 is connected to the bracket 110 through the optical axis 150. The bracket 110 can ensure that the gap between the mover 130 and the stator 212 is always maintained within the design standard range.

[0049] In some embodiments, the bracket 110 further includes two second connecting portions 113, which are respectively connected to opposite sides of the main body portion 111. One end of the second connecting portion 113 is connected to the main body portion 111, and the other end extends toward the stator 212. The second connecting portion 113 and the stator 212 are fixedly connected.

[0050] In some embodiments, the main body 111 is generally rectangular in shape, with two opposite sides of the main body 111 connected to a first connecting portion 112 and the other two opposite sides connected to a second connecting portion 113.

[0051] In some embodiments, the main body 111, the first connecting part 112, and the second connecting part 113 form a groove, and the movable member 120 is inserted into the groove.

[0052] In some embodiments, the bracket 110 is made of metal materials such as aluminum alloy or iron alloy. The bracket 110 can be used for the interconnection of various structural components of the linear motor. The transmission assembly 10 can be detachably connected to the drive assembly 20 via the bracket 110 to facilitate the maintenance of the linear motor.

[0053] In some embodiments, the bracket 110 and the drive assembly 20 can be fixedly connected by means of bolts, adhesive, snap-fit, etc.

[0054] This application achieves a dual improvement in transmission performance and assembly convenience by reconstructing the installation layout and positioning structure of the linear motor. The moving part 120 and the transmission seat 131 are independently installed outside the drive assembly 20, and an elastic element 180 is innovatively used as a displacement limiting unit. Utilizing the flexible buffering characteristics of the spring, the jamming and frictional resistance during transmission are effectively eliminated, ensuring smoother reciprocating movement. In the core connection structure, the inner ring of the linear bearing 140 and the inner ring of the spring are precisely connected in series via the optical shaft 150 and then connected to the bracket 110. With the guiding accuracy of the linear bearing 140 and the rigid support of the optical shaft 150, the problem of vertical swaying that easily occurs during the operation of the moving part 120 is fundamentally solved, significantly improving the stability of the linear motor. Simultaneously, the two ends of the spring are bidirectionally limited by the first connecting part 112 of the bracket 110 and the side wall 161 of the limiting element 160, respectively, preventing spring misalignment and functional failure. This further simplifies the overall assembly process, making installation more efficient and reliable, ultimately forming a transmission assembly 10 with clear positioning, stable operation, and easy maintenance.

[0055] In some embodiments, such as Figure 2 and Figure 9 As shown, the drive assembly 20 also includes a fixed base 210 and a second bolt 220. The stator 212 is located on the side of the fixed base 210 near the movable member 120. The fixed base 210 is also provided with a positioning part 211 on the side near the movable member 120. The positioning part 211 is provided with a first positioning hole 2101. The second connecting part 113 is provided with a second positioning hole 1101. The second bolt 220 is inserted into the first positioning hole 2101 and the second positioning hole 1101 to fix the bracket 110 and the fixed base 210 relative to each other.

[0056] In some embodiments, there are two positioning parts 211, and the stator 212 is located between the two positioning parts 211. The stator 212 is an iron core. As the skeleton of the coil and the magnetic circuit carrier, the stator 212 can enhance the magnetic field strength generated by the coil and improve the efficiency of electromagnetic interaction. In another aspect, it can guide the direction of the magnetic field and make the magnetic field more concentrated.

[0057] In some embodiments, the number of second positioning holes 1101 is four. The second positioning holes 1101 can be screw holes. Through the precise locking of the second bolt 220, the linear distance from the optical axis 150 to the stator 212 can be precisely controlled, thereby controlling the linear distance between the mover 130 and the stator 212, ensuring that the gap between the stator 212 and the mover 130 of the linear motor is always maintained within the design standard range.

[0058] In some embodiments, both positioning parts 211 are provided with a first positioning hole 2101, and each first positioning hole 2101 is provided with a second positioning hole 1101 at both ends. The number of second bolts 220 is the same as the number of first positioning holes 2101. The second bolts 220 are inserted into the first positioning hole 2101 and the second positioning holes 1101 at both ends of the first positioning hole 2101.

[0059] In some implementations, the second connecting part 113 has a connecting segment 114 at the end away from the main body part 111. There are four connecting segments 114, which are distributed around the drive assembly 20. Each connecting segment 114 is provided with a second positioning hole 1101. Each positioning part 211 has a connecting segment 114 on both opposite sides, and the connecting segment 114 is fixedly connected to the positioning part 211.

[0060] In some embodiments, the second connecting portion 113 is provided with a clearance opening 1102 at one end away from the main body portion 111. The clearance opening 1102 is located between the two connecting sections 114. The coil frame 230 is at least partially inserted into the clearance opening 1102. The clearance opening 1102 can be used to avoid the coil frame 230, making the structure of the linear motor more compact.

[0061] The linear motor provided in this application features a moving part 120 connected to a linear bearing 140 and an optical shaft 150, resulting in smoother and more fluid movement of the moving part 120. This new configuration replaces the function of a miniature slide rail, significantly improving linear motor performance while simplifying the assembly process for easier installation, effectively reducing manufacturing costs, and achieving a compact and lightweight structure. This addresses the pain points of existing linear motor applications. The linear motor balances economy and stability, contributing to improved production efficiency.

[0062] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. A linear motor, characterized in that, include: The transmission assembly includes a bracket, a movable component, a mover, a linear bearing, and an optical shaft. The movable component and the mover are fixedly connected. The movable component is movably connected to the optical shaft via the linear bearing. The optical shaft is connected to the bracket. A drive assembly includes a stator for generating a magnetic field, and a mover capable of driving the movable component to move along the optical axis under the action of the magnetic field.

2. The linear motor according to claim 1, characterized in that, The stator is used to generate an alternating magnetic field, and the mover can drive the movable component to reciprocate relative to the support under the action of the alternating magnetic field.

3. The linear motor according to claim 1, characterized in that, The transmission assembly further includes a limiting member, which is fixedly connected to the movable member. The limiting member is used to restrict the relative movement of the linear bearing and the movable member in the length direction of the optical axis.

4. The linear motor according to claim 3, characterized in that, The movable part is provided with a mounting part, the mounting part is provided with a mounting hole, the linear bearing is inserted into the mounting hole, the limiting part is provided with a receiving groove, the mounting part is inserted into the receiving groove, and the opposite ends of the linear bearing are respectively connected to the two oppositely arranged side walls of the receiving groove.

5. The linear motor according to claim 4, characterized in that, The side wall is provided with an insertion hole, the cross-sectional area of ​​which is smaller than the cross-sectional area of ​​the mounting hole, and the optical axis is inserted into the insertion hole and the mounting hole.

6. The linear motor according to claim 3, characterized in that, The limiting member is provided with a first fixing hole, the movable member is provided with a second fixing hole, the moving element includes a transmission seat and a magnet that are fixedly connected, the transmission seat is provided with a third fixing hole, and the transmission assembly also includes a first bolt, which is inserted into the first fixing hole, the second fixing hole and the third fixing hole, so that the limiting member, the movable member and the transmission seat are relatively fixed.

7. The linear motor according to claim 1, characterized in that, The bracket includes a main body and two first connecting parts. The two first connecting parts are respectively connected to opposite ends of the main body. The main body is located on the side of the movable member away from the stator. One end of the first connecting part is connected to the main body, and the other end extends toward the stator. The optical axis is connected between the two first connecting parts.

8. The linear motor according to claim 7, characterized in that, The transmission assembly further includes an elastic element, the movable element is at least partially located between the two first connecting portions, the elastic element connects the movable element and the first connecting portions, and the elastic element is arranged around the optical axis.

9. The linear motor according to claim 7, characterized in that, The bracket also includes two second connecting parts, which are respectively connected to opposite sides of the main body. One end of the second connecting part is connected to the main body, and the other end extends toward the stator. The second connecting part and the stator are fixedly connected.

10. The linear motor according to claim 9, characterized in that, The drive assembly also includes a fixed base and a second bolt. The stator is located on the side of the fixed base near the movable part. The fixed base is also provided with a positioning part on the side near the movable part. The positioning part is provided with a first positioning hole, and the second connecting part is provided with a second positioning hole. The second bolt is inserted into the first positioning hole and the second positioning hole to fix the bracket and the fixed base relative to each other.

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