Linear motor device

Abstract

The embodiment of the utility model discloses a linear motor device. The linear motor device comprises a shell, a driving system, a driven system and a feedback adjusting system, the driving system comprises a linear motor, a motor stator is fixedly connected with the shell, and a motor rotor is fixedly connected with the driven system. The driven system comprises a guide rail, a connecting piece and a magnetic railing ruler, the guide rail is fixedly connected with the shell, and the connecting piece is fixedly connected with the motor rotor, the magnetic railing ruler and a sliding block of the guide rail. The feedback adjusting system comprises a mounting bracket and a magnetic encoder, the mounting bracket is tightly attached to one side of the shell and fixedly connected with the shell, the magnetic encoder is fixedly connected with the mounting bracket and is parallel and opposite to the magnetic railing ruler, and the mounting bracket comprises at least two groups of mounting hole sites for mounting different types of magnetic encoders. According to the invention, different groups of mounting holes are arranged to adapt to various different magnetic encoders, so that the structure is optimized, the machining precision is reduced, and the assembly difficulty is simplified. And meanwhile, the assembly efficiency is further improved in a manner that the mounting bracket is tightly attached to the shell.

Description

Technical Field

[0001] The utility model belongs to the field of linear motors, and in particular relates to a linear motor device. Background Art

[0002] The driving force behind the development of linear motors comes from the growing demand for high-precision linear motion, especially in the fields of automation, precision manufacturing, semiconductor processing, transportation and magnetic levitation technology. It directly provides faster response speed, higher positioning accuracy and system efficiency by eliminating the conversion mechanism (such as gears and belts) that traditional rotary motors rely on. The original linear rotary motor motion platform uses a linear motor + rotary motor + aluminum alloy connection structure + feedback element to form a system. The internal and external purchased components are expensive, the structural parts are complex, and the processing cost is high. Utility Model Content

[0003] The utility model is dedicated to solving the deficiencies of the prior art and aims to reduce the machining accuracy and simplify the assembly difficulty by optimizing the structure of the linear motor so as to reduce the motor cost.

[0004] In one aspect, the present invention discloses a linear motor device, comprising:

[0005] A housing, and a driving system, a driven system and a feedback adjustment system arranged inside the housing;

[0006] The driving system comprises a linear motor, the linear motor comprises a matching motor stator and a motor mover, the motor stator is fixedly connected to the housing, and the motor mover is fixedly connected to the driven system;

[0007] The driven system comprises a guide rail, a connecting piece and a magnetic scale, wherein the guide rail is fixedly connected to the housing, and the connecting piece is fixedly connected to the motor mover, the magnetic scale and a slider of the guide rail so as to slide along the guide rail during the operation of the linear motor;

[0008] The feedback adjustment system includes a mounting bracket and a magnetic encoder. The mounting bracket is tightly fitted to one side of the shell and fixedly connected to the shell. The magnetic encoder is fixedly connected to the mounting bracket and is parallel to the magnetic scale. The mounting bracket includes at least two groups of mounting holes for installing different types of magnetic encoders.

[0009] In a possible implementation, the mounting bracket includes two groups of mounting holes, wherein a mounting direction of one group of mounting holes is perpendicular to the surface of the shell, and a mounting direction of the other group of mounting holes is parallel to the surface of the shell.

[0010] In a possible implementation, the magnetic scale is a sheet structure located perpendicular to the surface of the housing;

[0011] The mounting bracket includes a mounting platform whose side surface is parallel to the magnetic scale and whose front surface is parallel to the surface of the housing;

[0012] A group of mounting holes are respectively arranged on the front and side surfaces of the mounting platform.

[0013] In a possible implementation, the mounting bracket further includes a mounting base, which is a sheet-like structure, a side surface of one side of which is tightly fitted and fixedly connected to a side surface of the housing, and the mounting platform is fixed to the front surface of the other side of the mounting base.

[0014] In a possible implementation, the driven system further includes a spring pull seat and a spring;

[0015] The spring pull seat is fixed to the surface of the shell, and includes a fixing frame and a plurality of groups of mounting circular holes in an array, each group of the mounting circular holes is parallel to the side surface of the shell, and the distance between the position after being fixed to the surface of the shell through different mounting holes and the side surface of the shell is different;

[0016] One side of the spring is fixed on the fixing frame, and the other side is fixedly connected to the connecting member. The moving direction of the spring is parallel to the guide rail.

[0017] In a possible implementation, the driven system further includes an adapter, the adapter is fixedly connected to the connecting member, and the magnetic scale is fixed on the adapter.

[0018] In a possible implementation, it also includes a photoelectric switch;

[0019] The driven system further comprises a photoelectric baffle, one end of which is fixedly connected to the connecting member, and the other end of which is used to control the photoelectric switch during the sliding process of the connecting member.

[0020] In a possible implementation manner, the photoelectric baffle is fixedly connected to the connecting member by bolts.

[0021] In a possible implementation, the photoelectric switch is a U-shaped groove photoelectric sensor fixed on the surface of the housing, and the switch state is switched based on the inward or outward movement of one end of the photoelectric baffle.

[0022] In a possible implementation, the driven system further includes a rotating motor, and the rotating motor is fixedly connected to the connecting member.

[0023] In the embodiment of the utility model, different groups of mounting holes are provided to adapt to different magnetic encoders, thereby optimizing the structure while reducing the processing accuracy and simplifying the assembly difficulty. At the same time, the assembly efficiency is further improved by the installation bracket and the housing being closely fitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] This specification describes the complete and instructive disclosure of the present application, including its best mode of implementation, for those skilled in the art. This specification refers to the accompanying drawings, in which:

[0025] Figure 1 One of the structural schematic diagrams of a linear motor device provided in an embodiment of the utility model;

[0026] Figure 2 A second structural schematic diagram of a linear motor device provided in an embodiment of the utility model;

[0027] Figure 3 A schematic diagram of the structure of a driven system provided by an embodiment of the utility model;

[0028] Figure 4 A schematic diagram of the structure of a feedback regulation system provided in an embodiment of the utility model.

[0029] Reference numerals:

[0030] 1 guide rail, 2 linear motor, 3 mounting bracket, 4 magnetic encoder, 5 data interface, 6 air nozzle, 7 spring pull seat, 8 spring, 9 rotary motor, 10 photoelectric switch, 11 photoelectric baffle, 12 connector, 13 magnetic scale, 14 housing, 15 mounting hole, 16 adapter, 17 motor mover. DETAILED DESCRIPTION

[0031] Now with reference to the embodiments of the present application in detail, one or more examples of the embodiments of the present application are illustrated in the drawings. Each example is provided to explain the present application, but not to limit the present application. In fact, it will be clear to those skilled in the art that various modifications and changes can be made in the present application without departing from the scope or spirit of the present application. For example, the features described or described as a part of an embodiment can be used together with another embodiment to produce another embodiment. As used in this specification, the terms "first", "second", etc. are used interchangeably to distinguish one component from another component without intending to indicate the position or importance of each component. As used in the specification, unless the context clearly indicates otherwise, the terms "one", "an", "the", and "said" are intended to indicate that there are one or more elements. The terms "include", "include" and "have" are intended to be inclusive, and mean that there may be other elements in addition to the listed elements.

[0032] Now referring to the drawings, in which the same numerals represent the same elements in all the drawings, the present invention will be further explained below in conjunction with specific embodiments.

[0033] Figure 1This is one of the structural schematic diagrams of a linear motor 2 device provided in an embodiment of the utility model. Figure 1 As shown, the linear motor 2 device of the embodiment of the utility model includes a housing 14, a drive system, a driven system and a feedback adjustment system. Among them, the housing 14 has a cavity inside for accommodating the drive system, the driven system and the feedback adjustment system. Optionally, the side of the housing 14 can also be provided with a data interface 5 for signal data transmission with the internal system, and a gas nozzle 6 for inputting gas into the interior or for ventilation and heat dissipation.

[0034] In a possible implementation, the drive system includes a linear motor 2, and the linear motor 2 includes a motor stator and a motor mover 17 that can match each other. Among them, the motor stator of the linear motor 2 is fixedly connected to the housing 14, and the connection method can be fixed by fasteners such as bolts. During the operation of the linear motor 2, the motor stator of the linear motor 2 is always guaranteed to be fixed in position. The motor mover 17 of the linear motor 2 is fixedly connected to the driven system, and is used to interact with the motor stator during the operation of the linear motor 2 to make a linear motion along the trajectory defined by the driven system. Optionally, the linear motor 2 in the embodiment of the utility model can be a linear motor 2 of any structural type, which is not limited here. For example, when the motor stator has two parallel and relative grooves of the magnetic track, the thrust coil of the motor mover 17 is located inside the groove of the motor stator. During the operation of the linear motor 2, the motor mover 17 is energized to cut the magnetic field to generate electromagnetic thrust, so that the thrust coil is parallel to the magnetic track and makes a linear reciprocating motion in the groove.

[0035] In a possible implementation, the driven system includes a guide rail 1, a connector 12 and a magnetic scale 13. The guide rail 1 can be fixedly connected to the housing 14 in any manner, and a slider that can slide up and down relative to the guide rail 1 is provided on the guide rail 1. The motor mover 17 is fixedly connected to the connector 12, and the connector 12 is fixed to the slider on the guide rail 1 so that it can slide up and down along the guide rail 1 with the movement of the motor mover 17 during the operation of the linear motor 2, thereby ensuring that the motion trajectory of the motor mover 17 and the entire driven system is a linear motion trajectory. At the same time, the magnetic scale 13 is also fixedly connected to the connector 12, and also moves linearly with the connector 12 during the operation of the linear motor 2. Optionally, the magnetic scale 13 can be a sheet structure that is perpendicular to the surface of the housing 14 and parallel to the surface of the guide rail 1, and a fine scale can be provided on the top for reading by the magnetic encoder 4.

[0036] Figure 2 This is a second schematic diagram of the structure of a linear motor 2 device provided in an embodiment of the utility model. Figure 2As shown, in the linear motor 2 device of the utility model embodiment, the driven system may further include a spring pull seat 7 and a spring 8. Wherein, the spring pull seat 7 is fixed on the surface of the housing 14, including a fixing frame for connecting the spring 8 and a mounting circular hole for fixing with the housing 14. Optionally, the mounting circular holes may be multiple groups, each group of which is arranged in a parallel array, and each group of mounting circular holes is parallel to the side of the housing 14. When the spring pull seat 7 is fixedly installed with the surface of the housing 14 through different groups of mounting holes, the distance between the spring pull seat 7 and the side of the housing 14 to which it is relatively parallel is different. In different application scenarios such as different lengths of the spring 8, different groups of mounting holes can be selected to be fixedly installed with the housing 14. Further, one side of the spring 8 is fixedly connected to the fixing frame, and the other side is fixedly connected to the connecting member 12, and the spring 8 is parallel to the guide rail, that is, the direction of movement is parallel to the guide rail.

[0037] Based on the structural setting of the spring pull seat 7, when it is necessary to adjust the vertical distance of the spring pull seat 7, the screws can be directly loosened to adjust the vertical distance through different groups of mounting circular holes, thereby increasing the adjustment range. At the same time, it is avoided that the spring pull seat 7 is always in a stressed state, due to vibration or because the screws are not screwed in place, and the distance displacement in the vertical direction occurs.

[0038] Optionally, the linear motor 2 device of the utility model embodiment may also include a photoelectric switch 10, which can be fixed inside the housing 14. At the same time, the driven system may also include a photoelectric baffle 11, one end of which is fixed to the connecting member 12, and the other end is used to control the photoelectric switch 10 during the sliding process of the connecting member 12. Among them, the photoelectric baffle 11 can be fixedly connected to the connecting member 12 by bolts. The photoelectric switch 10 can be a U-shaped groove photoelectric sensor fixed on the surface of the housing 14. The U-shaped groove photoelectric sensor is a photoelectric detection device, and its working principle is based on the interruption of light to detect the presence or absence of an object. Therefore, the photoelectric baffle 11 can be inserted into the U-shaped groove to block the light signal when moving to one side of the guide rail, and leave the U-shaped groove when moving to the other side of the guide rail. Based on this structure and working principle, the photoelectric switch 10 can switch the switch state based on the movement in or out of one end of the photoelectric baffle 11.

[0039] Based on the above structure, the photoelectric baffle 11 can be quickly and accurately installed by changing the screw fixing direction and method, reducing assembly time and improving assembly efficiency and effect. The above structure removes some unnecessary parts and enhances the overall rigidity of the linear motor 2 device.

[0040] Figure 3 The following is a schematic diagram of the structure of a driven system provided by an embodiment of the utility model. Figure 3As shown, the driven system of the present novel embodiment may further include an adapter 16, which is fixedly connected to the connecting member 12 and the magnetic scale 13, and is used to indirectly fix the magnetic scale 13 on the connecting member 12. At the same time, the driven system in this embodiment also includes a rotary motor 9, which is also fixedly connected to the connecting member 12. During the operation of the linear motor 2, the rotary motor 9 also slides up and down along the guide rail 1 with the connecting member 12.

[0041] In a possible implementation, the feedback adjustment system in the embodiment of the utility model includes a mounting bracket 3 and a magnetic encoder 4. Among them, the mounting bracket 3 is tightly fitted with one side of the housing 14 and is fixedly connected to the housing 14. The magnetic encoder 4 is fixedly connected to the mounting bracket 3 and is parallel to the magnetic scale 13. The magnetic encoder 4 is an encoder based on the magnetoelectric principle. It can detect the change of the magnetic field based on the magnetic scale 13 to determine the linear position, and is a position feedback element. It is used to monitor the linear position in real time during the operation of the linear motor 2 device, so as to further realize the position adjustment of the drive system according to the monitored position. Optionally, in different application scenarios, the types of magnetic encoders 4 are different. In order to avoid replacing the mounting bracket 3 at the same time when replacing the magnetic encoder 4, at least two groups of mounting holes 15 for installing different types of magnetic encoders 4 can be set on the mounting bracket 3 to adapt to different magnetic encoders 4.

[0042] Figure 4 The structure diagram of a feedback regulation system provided by the embodiment of the utility model is shown in FIG. Figure 4 As shown, the mounting bracket 3 in the embodiment of the utility model may include two groups of mounting holes 15, wherein the mounting direction of one group of mounting holes 15 is perpendicular to the surface of the housing 14, and the mounting direction of the other group of mounting holes 15 is parallel to the surface of the housing 14. Further, the mounting bracket 3 may also include a mounting platform whose side is parallel to the magnetic scale 13 and whose front is parallel to the surface of the housing 14, and the mounting holes 15 are arranged on the mounting platform for fixedly mounting the magnetic encoder 4. A group of mounting holes 15 are respectively provided on the front and side of the mounting platform. Optionally, the mounting bracket 3 may also include a mounting base, which is a sheet-like structure, and the side of one side is tightly fitted and fixedly connected to the side of the housing 14, and the mounting platform is fixed to the front of the other side of the mounting base. The magnetic encoder 4 can be fixedly connected to the mounting platform by bolts matching the size of the mounting holes 15.

[0043] Based on the structure of the mounting bracket 3, the linear motor 2 device of the utility model embodiment is compatible with two commonly used magnetic encoders 4, making it interchangeable. At the same time, since the mounting position of the mounting base in the mounting bracket 3 is close to the housing 14 for installation, the parallelism of the relative positions of the magnetic encoder 4 and the magnetic scale 13 is further ensured, which reduces the assembly time and the difficulty of assembling components.

[0044] Based on the above technical features, the embodiment of the utility model adopts some mature and efficient production processes to improve the structure of the linear motor device, reducing customized components and reducing economic costs. At the same time, based on the improved structure, the complexity of the linear motor device is simplified, the assembly difficulty is reduced, the assembly process is simplified, and the overall stability and efficiency of the assembly process are improved.

[0045] This specification uses embodiments to disclose the present application, including the best embodiment, and also enables those skilled in the art to practice the present application, including making and using any device or system and performing any incorporated method. The embodiments of the present application and the technical solutions obtained by slightly changing the embodiments are all within the protection scope of the present application.

Claims

1. A linear motor device, characterized in that: include: A housing, and a driving system, a driven system and a feedback adjustment system arranged inside the housing; The driving system comprises a linear motor, the linear motor comprises a matching motor stator and a motor mover, the motor stator is fixedly connected to the housing, and the motor mover is fixedly connected to the driven system; The driven system comprises a guide rail, a connecting piece and a magnetic scale, wherein the guide rail is fixedly connected to the housing, and the connecting piece is fixedly connected to the motor mover, the magnetic scale and a slider of the guide rail so as to slide along the guide rail during the operation of the linear motor; The feedback adjustment system includes a mounting bracket and a magnetic encoder. The mounting bracket is tightly fitted to one side of the shell and fixedly connected to the shell. The magnetic encoder is fixedly connected to the mounting bracket and is parallel to the magnetic scale. The mounting bracket includes at least two groups of mounting holes for installing different types of magnetic encoders.

2. The linear motor device according to claim 1, characterized in that: The mounting bracket includes two groups of mounting holes, wherein the mounting direction of one group of mounting holes is perpendicular to the surface of the shell, and the mounting direction of the other group of mounting holes is parallel to the surface of the shell.

3. The linear motor device according to claim 2, characterized in that: The magnetic scale is a sheet structure located perpendicular to the surface of the shell; The mounting bracket includes a mounting platform whose side surface is parallel to the magnetic scale and whose front surface is parallel to the surface of the housing; A group of mounting holes are respectively arranged on the front and side surfaces of the mounting platform.

4. The linear motor device according to claim 3, characterized in that: The mounting bracket also includes a mounting base, which is a sheet-like structure, a side surface of which is tightly fitted and fixedly connected to the side surface of the shell, and the mounting platform is fixed to the front surface of the other side of the mounting base.

5. The linear motor device according to claim 1, characterized in that: The driven system also includes a spring pull seat and a spring; The spring pull seat is fixed to the surface of the shell, and includes a fixing frame and a plurality of groups of mounting circular holes in an array, each group of the mounting circular holes is parallel to the side surface of the shell, and the distance between the position after being fixed to the surface of the shell through different mounting holes and the side surface of the shell is different; One side of the spring is fixed on the fixing frame, and the other side is fixedly connected to the connecting member. The moving direction of the spring is parallel to the guide rail.

6. The linear motor device according to claim 1, characterized in that: The driven system further comprises an adapter, the adapter is fixedly connected to the connecting member, and the magnetic scale is fixed on the adapter.

7. The linear motor device according to claim 1, characterized in that: Also includes photoelectric switches; The driven system further comprises a photoelectric baffle, one end of which is fixedly connected to the connecting member, and the other end of which is used to control the photoelectric switch during the sliding process of the connecting member.

8. The linear motor device according to claim 7, characterized in that: The photoelectric baffle is fixedly connected to the connecting member by bolts.

9. The linear motor device according to claim 7 or 8, characterized in that: The photoelectric switch is a U-shaped slot photoelectric sensor fixed on the surface of the housing, and switches the switch state based on the inward or outward movement of one end of the photoelectric baffle.

10. The linear motor device according to claim 1, characterized in that: The driven system further comprises a rotating motor, and the rotating motor is fixedly connected to the connecting member.

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