A linear motor and assembly

Abstract

The present invention discloses a linear motor and its assembly, belonging to the technical field of linear motors, comprising a top cover assembly and a bottom cover assembly, a fixing pad arranged between the top cover shell and the bottom cover shell, a winding core and a magnetic conductive core arranged between the axial sides of the fixing pad and the motor cover, a bolt assembly used for assembling and connecting the top cover shell, the bottom cover shell, the fixing pad and the winding core, a mover bracket arranged slidably between the top cover assembly and the bottom cover assembly, a magnetic body assembled inside the mover bracket, the linear motor arranges corresponding coil windings at the two poles of the magnetic body, utilizes the interaction between the magnetic force of the two poles and the excitation coil to drive the mover assembly to perform linear motion, saves the use of magnetic materials, effectively reduces the size of the motor, improves the response speed of the motor, replaces the coil excitation with the magnetic body to reduce power consumption, and at the same time reduces iron loss and copper loss, so that the motor is small in size and high in efficiency, has a simple structure, is easy to assemble, reduces cost, has a wide range of uses, and has great economic and social value.

Description

Technical Field

[0001] The present invention belongs to the technical field of linear motors, and in particular relates to a linear motor and its components. Background Art

[0002] A linear motor is a new type of motor that generates electromagnetic force when the coil winding is energized, and interacts with the magnetic force of the magnetic body to drive the motor rotor assembly to drive the transmission rod to move back and forth linearly. Some equipment uses linear motors to drive due to limited application space and the need for linear power to do work. Currently, linear motors on the market are usually large in size and difficult to install and operate in some relatively narrow working environments. Summary of the Invention

[0003] In view of the deficiencies in the prior art, an object of the embodiments of the present invention is to provide a linear motor and assembly to solve the problems in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A linear motor and assembly, including a top cover assembly, the top cover assembly including a top cover shell and a guide hole, the guide hole being arranged on one side of the top cover shell;

[0006] A bottom cover assembly, comprising a bottom cover shell and an electrode sheet, wherein the electrode sheet is assembled on one side of the bottom cover shell;

[0007] A stator assembly comprising a fixed pad, a winding core, a magnetic conductive core, and a winding frame assembly, wherein the winding core and the magnetic conductive core are axially stacked and respectively arranged between the top cover shell and the fixed pad, and between the bottom cover shell and the fixed pad, and the winding frame assembly comprises a plurality of first coils and second coils, which are fixedly assembled between the teeth and yoke of the winding core; or a structure of a layer of coils and multiple magnetic bodies is used to achieve linear drive;

[0008] A bolt assembly is arranged between the top cover assembly and the bottom cover assembly, and is used to assemble and connect the top cover shell, the bottom cover shell, the fixing pad and the winding core;

[0009] The mover assembly includes a mover bracket, a transmission rod, and a magnetic body. The mover bracket is slidably arranged between the top cover shell and the guide hole. The transmission rod at one end of the mover bracket extends through the central openings of the top and bottom cover shells. The mover bracket is also equipped with a magnetic body. The transmission rod head is provided with a latching position, which extends into the coupling head to transmit the motor load.

[0010] As a further solution of the present invention, the top cover assembly further includes an assembly groove, and the bottom cover assembly further includes an assembly hole, and the assembly hole is matched with the assembly groove.

[0011] As a further solution of the present invention, the magnetic conductive core is buckled and assembled between two groups of winding cores.

[0012] As a further solution of the present invention, the bolt assembly includes a bolt and a nut. After one end of the bolt passes through the assembly hole on the bottom cover shell, the tail end passes through the fixing pad and the winding core, and the assembly groove on one side of the top cover shell, the bolt is locked in the assembly groove by the nut.

[0013] As a further solution of the present invention, the plurality of first coils and second coils are arranged in parallel between the top cover shell and the bottom cover shell.

[0014] As a further solution of the present invention, the mover assembly also includes a guide rod, which is fixedly assembled between the top cover shell and the guide hole and is arranged parallel to the first coil and the second coil to limit the sliding trajectory of the mover bracket.

[0015] As a further solution of the present invention, the linear motor also includes a telescopic rotation mechanism, which includes a sleeve, a threaded groove, a flange and a convex tooth. The sleeve is fixedly assembled at one end of the top cover shell, and a threaded groove is arranged on the sleeve. A bearing is embedded in the flange. The end of the transmission rod passes through the bearing after tapping, and the nut fixes the bearing on the transmission rod. The convex tooth on the outside of the flange is assembled in the threaded groove inside the sleeve.

[0016] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0017] This linear motor arranges corresponding coil windings at the two poles of the magnetic body, and utilizes the interaction between the magnetic force of the two poles and the excitation coil to drive the rotor assembly to perform linear motion, thereby saving the use of magnetic materials, effectively reducing the size of the motor, and improving the motor response speed. The magnetic body replaces the coil excitation to reduce power consumption, while reducing iron loss and copper loss, making the motor small in size and high in efficiency. It has a simple structure, easy assembly, low cost, wide application, and great economic and social value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a linear motor and components provided in one embodiment of the present invention.

[0019] Figure 2 The figure is a schematic structural diagram of a linear motor and a winding core in an assembly provided in one embodiment of the present invention.

[0020] Figure 3 The figure is a schematic diagram of the end structure of a linear motor and its components provided in one embodiment of the present invention.

[0021] Figure 4The figure is a schematic structural diagram of a linear motor and a winding frame group in an assembly provided in an embodiment of the present invention.

[0022] Figure 5 Schematic diagram of the structure of a linear motor and a moving subassembly in an assembly provided in one embodiment of the present invention.

[0023] Figure 6 This is a structural diagram of Example 1 of a linear motor and its components provided in an embodiment of the present invention.

[0024] Figure 7 Schematic diagram of the fastener in Example 1 of the linear motor and assembly provided in one embodiment of the present invention.

[0025] Figure 8 This is a structural diagram of Example 2 of a linear motor and its components provided in one embodiment of the present invention.

[0026] Figure 9 The figure is a schematic structural diagram of a linear motor and a telescopic rotation mechanism in an assembly provided in one embodiment of the present invention.

[0027] Figure 10 Schematic diagram of the structure of the linear motor and the convex teeth in the assembly provided in one embodiment of the present invention.

[0028] Figure 11 This is a structural diagram of Example 3 of a linear motor and its components provided in one embodiment of the present invention.

[0029] Figure markings: 1-top cover assembly, 101-top cover shell, 102-guide hole, 103-assembly groove, 2-bottom cover assembly, 201-bottom cover shell, 202-assembly hole, 203-electrode sheet, 3-stator assembly, 301-fixing pad, 302-winding core, 303-magnetic core, 4-bolt assembly, 401-bolt, 402-nut, 5-winding frame group, 501-first coil, 502-second coil, 6-mover assembly, 601-mover bracket, 602-transmission rod, 603-magnetic body, 604-guide rod, 605-fastener, 7-stator layer, 8-telescopic rotation mechanism, 801-braces, 802-thread groove, 803-flange, 804-convex tooth. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] See also Figure 1-Figure 5The linear motor and assembly in one embodiment of the present invention include a top cover assembly 1, which includes a top cover shell 101 and a guide hole 102, with the guide hole 102 arranged on one side of the top cover shell 101; a bottom cover assembly 2, which includes a bottom cover shell 201 and an electrode sheet 203, with the electrode sheet 203 assembled on one side of the bottom cover shell 201; a stator assembly 3, which includes a fixing pad 301, a winding core 302, a magnetic conductive core 303, and a winding frame. Group 5, the winding core 302 and the permeable core 303 are axially stamped and respectively arranged between the top cover shell 101 and the fixed pad 301, and the bottom cover shell 201 and the fixed pad 301, the winding frame group 5 includes a plurality of first coils 501 and second coils 502, the first coils 501 and the second coils 502 are fixedly assembled between the teeth and yoke of the winding core 302, or a layer of coils is used with a structure of multiple magnetic bodies to achieve linear drive; the plurality of first coils 501 and The second coil 502 is arranged in parallel between the top cover shell 101 and the bottom cover shell 201, and the first coil 501 and the second coil 502 are electrically connected to the electrode sheet 203; the bolt assembly 4 is arranged between the top cover assembly 1 and the bottom cover assembly 2, and is used to assemble and connect the top cover shell 101, the bottom cover shell 201, the fixing pad 301 and the winding core 302; and the mover assembly 6, which includes a mover bracket 601, a transmission rod 602, a magnetic body 603 and a guide rod 604. The mover bracket 601 is slidably arranged between the top cover shell 101 and the guide hole 102, and the transmission rod 602 at one end of the mover bracket 601 is slidably assembled in the guide hole 102. The mover bracket 601 is also equipped with a magnetic body 603. The guide rod 604 is fixedly assembled between the top cover shell 101 and the guide hole 102 and is arranged parallel to the first coil 501 and the second coil 502 to define the sliding trajectory of the mover bracket 601. The head of the transmission rod is provided with a locking position, and after extending into the buckle position of the coupling head, it transmits the motor load.

[0032] In actual application, this embodiment further comprises a top cover shell 101 and a bottom cover shell 201 at both ends of the motor and a fixing pad 301 placed between two layers of winding cores 302, wherein the inner side sinking holes of the top cover shell 101 and the bottom cover shell 201 are used to fix the guide rod 604, and the edges of the top cover shell 101 and the bottom cover shell 201 are respectively provided with assembly grooves 103 and assembly holes 202 for assembling bolt assemblies 4, and through holes are symmetrically provided on the fixing pad 301. The bolt assembly 4 is inserted into the assembly hole 202 at one end of the bottom cover shell 201 and passes through the through hole of the winding core 302 and the through hole of the fixing pad 301, and extends from the assembly groove 103 at the other end of the top cover shell 101. After being fixed, the various components of the motor are assembled into a complete motor.

[0033] When the linear motor is working, since the mover bracket 601 is slidably assembled between the top cover shell 101 and the bottom cover shell 201, and the transmission rod 602 at one end of the mover bracket 601 is slidably assembled in the guide hole 102, when the first coil 501 and the second coil 502 arranged on the inner side of the winding core 302 generate alternating magnetic forces when the electrode sheet 203 is energized, it can drive the magnetic body 603 in the mover bracket 601 to slide back and forth between the top cover shell 101 and the bottom cover shell 201, thereby realizing the function of linear motion.

[0034] In one case of this embodiment, the stator core is continuously punched into a square or round shape using silicon steel sheets. The holes in the outer yoke are convenient for bolts to pass through to fix the motor. The inner teeth correspond to the side of the magnetic body. Since the space of the micro motor is limited and the corresponding tooth spacing cannot allow the winding jig to pass through normally for winding, the stator core can be divided into a magnetic conductive core and a winding core for stamping. The magnetic conductive core can be wound after injection molding the winding frame, or it can be buckled into the magnetic conductive core after winding on the winding frame. After winding, the magnetic conductive core is symmetrically fixed on the bolts through the bolts, and then the winding core is clamped between the magnetic conductive cores to form a complete magnetic circuit to avoid magnetic leakage from the core and reduce the efficiency of the motor.

[0035] In one case of this embodiment, the linear motor works by connecting to a load through a coupling head at one end of the transmission rod 602. The coupling head and the transmission rod 602 can be connected by a male and female buckle design. When the transmission rod 602 is inserted into the coupling head, it is automatically fastened, making it convenient to connect an external load.

[0036] See also Figure 1 In a preferred embodiment of the invention, the top cover assembly 1 further includes an assembly groove 103, and the bottom cover assembly 2 further includes an assembly hole 202, and the assembly hole 202 is matched with the assembly groove 103; the bolt assembly 4 includes a bolt 401 and a nut 402, and after one end of the bolt 401 passes through the assembly hole 202 on the bottom cover shell 201, the end passes through the fixing pad 301 and the winding core 302 and the assembly groove 103 on one side of the top cover shell 101, the bolt 401 is locked in the assembly groove 103 by the nut 402.

[0037] In actual application of this embodiment, the bolt 401 is inserted into the assembly hole 202 at one end of the bottom cover shell 201 and then passes through the through hole on the fixing pad 301 and the through hole of the winding core 302, and extends from the assembly slot 103 at the other end of the top cover shell 101. The bolt 401 is fixed and locked by assembling the nut 402 in the assembly slot 103, thereby completing the assembly of the entire motor, and the magnetic conductive core 303 is snap-fitted and assembled between the winding cores 302 on the same side.

[0038] In one case of this embodiment, the first coil 501 and the second coil 502 are arranged close to one side of the winding core 302 .

[0039] See also Figure 9 and 10 In one embodiment of the invention, the linear motor further includes a telescopic rotation mechanism, which includes a sleeve 801, a threaded groove 802, a flange 803, and a convex tooth 804. The sleeve 801 is fixedly assembled on one end of the top cover shell 101, and a threaded groove 802 is arranged on the sleeve 801. A bearing is embedded in the flange 803. The end of the transmission rod 602 is tapped and passes through the bearing. The nut fixes the bearing on the transmission rod 602. The convex tooth 804 on the outside of the flange 803 is assembled in the threaded groove 802 inside the sleeve 801.

[0040] In actual application of this embodiment, the linear motor can be converted into a telescopic rotation mechanism to obtain telescopic and rotational power output, and synchronously realize the telescopic and rotation functions of related products. The brace 801 is provided with a thread groove 802, and the flange 803 is embedded with a bearing. The end of the transmission rod 602 is tapped and passed through the bearing, and the bearing is fixed to the transmission rod 602 with a nut. The convex teeth 804 hold the arc trajectory of the thread groove 802 inside the brace 801 to reciprocate and telescope. Example 1

[0041] See also Figure 6 and 7 In one embodiment of the present invention, the linear motor does not have a guide rod 604 structure inside. By using the snap-fit ​​parts 605 to snap-fit ​​on both sides of the mover bracket 601, the magnetic body 603 assembled inside the mover bracket 601 can be limited and clamped to prevent the magnetic body 603 from radially shifting and falling off during the sliding process. Example 2

[0042] See also Figure 8 In one embodiment of the present invention, when a large displacement application scenario is required, Figure 8 The motor stator assembly is arranged in more than three layers to obtain a large motor stroke to achieve large displacement. After the current passes through each stator layer 7, the power is cut off in one layer of the adjacent two layers of coils and the current is reversed, so that the motor rotor continuously obtains step-by-step excitation force, thereby stepping the rotor to obtain a large stroke reciprocating linear displacement. Example 3

[0043] See also Figure 11 In one embodiment of the present invention, when the motor is limited to a very small space, it can be Figure 11 The structure reduces the linear motor to one layer of stator winding. The unidirectional intermittent input current forms a unidirectional excitation force that acts on the motor mover to move in one direction. A reset spring is installed at one end of the mover. When the current is interrupted, the spring resets the mover, thereby obtaining reciprocating linear power.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A linear motor, characterized in that: The linear motor comprises: A top cover assembly, the top cover assembly comprising a top cover shell and a guide hole, wherein the guide hole is arranged on one side of the top cover shell; A bottom cover assembly, comprising a bottom cover shell and an electrode sheet, wherein the electrode sheet is assembled on one side of the bottom cover shell; A stator assembly comprising a fixed pad, a winding core, a magnetic conductive core, and a winding frame assembly, wherein the winding core and the magnetic conductive core are axially laminated and respectively arranged between the top cover shell and the fixed pad, and between the bottom cover shell and the fixed pad, and wherein the winding frame assembly comprises a plurality of first coils and second coils, which are fixedly assembled between the teeth and yoke of the winding core, or a structure of a layer of coils and multiple magnetic bodies is used to achieve linear drive; A bolt assembly is arranged between the top cover assembly and the bottom cover assembly, and is used to assemble and connect the top cover shell, the bottom cover shell, the fixing pad and the winding core; The mover assembly includes a mover bracket, a transmission rod and a magnetic body. The mover bracket is slidably arranged between the top cover shell and the guide hole, and the transmission rod of the mover bracket extends from the central opening of the top cover shell and the bottom cover shell. The mover bracket is also equipped with a magnetic body. The head of the transmission rod is provided with a locking position, and after extending into the buckle position of the coupling head, the motor load is transmitted; The top cover assembly further includes an assembly groove, and the bottom cover assembly further includes an assembly hole, wherein the assembly hole is matched with the assembly groove; The magnetic conductive core is buckled and assembled between the two groups of winding cores.

2. A linear motor according to claim 1, characterized in that: The bolt assembly includes a bolt and a nut. After one end of the bolt passes through the assembly hole on the bottom cover shell, the other end passes through the fixing pad and the winding core and the assembly groove on one side of the top cover shell, and the bolt is locked in the assembly groove by the nut.

3. The linear motor according to claim 1, characterized in that: The plurality of first coils and second coils are axially arranged in parallel between the top cover shell and the bottom cover shell.

4. The linear motor according to claim 1, characterized in that: The mover assembly further includes a guide rod, which is fixedly assembled between the top cover shell and the guide hole and is arranged parallel to the first coil and the second coil to limit the sliding track of the mover bracket.

5. A linear motor according to claim 1, further comprising a telescopic rotation mechanism, comprising a threaded sleeve, a threaded groove, a flange, and a convex tooth, wherein the threaded sleeve is fixedly assembled at one end of the top cover shell, the threaded sleeve is provided with a threaded groove, a bearing is embedded in the flange, the end of the transmission rod is threaded and passes through the bearing, a nut fixes the bearing to the transmission rod, and the convex tooth on the outside of the flange is assembled in the threaded groove in the threaded sleeve.

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