A guide rail embedded type linear motor module

Abstract

The application discloses a guide rail embedded type linear motor module, which comprises a guide rail and a sliding block; a groove is arranged on the inner surface of the sliding block and on the two sides of the guide rail, a rolling body raceway made of carbon steel or stainless steel is embedded in the groove, a return hole is arranged in the sliding block, return end covers are fixedly installed on the left and right ends of the sliding block, a rotary groove is arranged in the return end cover, the rolling body raceway, the return hole and the rotary groove form a rolling circulation rotary channel, and a rolling body made of stainless steel is installed in the rolling circulation rotary channel; the return hole is located above the rolling body raceway; a magnetic grating ruler or an optical grating ruler is arranged on the guide rail, and an optical grating reading head is arranged on the sliding block; a linear motor stator is installed on the guide rail, a linear motor rotor corresponding to the linear motor stator is arranged on the sliding block, and the motor rotor is communicated with a power supply. The application ensures that the rolling body does not pass through the magnetic induction line range when rotating, guarantees that the rolling body is not magnetized, and guarantees the smoothness of the rolling body rotation.

Description

Technical Field

[0001] This invention belongs to the technical field of linear motion modules, and specifically relates to a linear motor module with an embedded guide rail. Background Technology

[0002] A linear motor module is a transmission device that directly converts electrical energy into mechanical energy for linear motion by expanding a closed magnetic field into an open magnetic field, without requiring any intermediate conversion mechanism. It is generally composed of guide rails, sliders, lead screws, aluminum alloy components, etc., and achieves linear motion through the non-contact magnetic induction principle between the moving and stators of the linear motor.

[0003] Due to the demands of current operating conditions, in addition to requiring a more compact external structure for linear motor modules, higher requirements are also placed on the response and operating speed of linear motor modules, as well as higher requirements on repeatability and positional accuracy. Therefore, the current structure of linear motor modules can no longer meet the requirements of customers. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a guide rail-embedded linear motor module that achieves high-speed response and operation.

[0005] A guide rail embedded linear motor module according to a first aspect of the present invention includes a guide rail and a slider mounted on the guide rail.

[0006] The inner surface of the slider and both sides of the guide rail are provided with grooves. Roller tracks made of carbon steel or stainless steel are embedded in the grooves. The slider is provided with a return hole. Return end caps are fixedly installed at the left and right ends of the slider. The return end caps are provided with a rotary groove that connects the roller tracks and the return hole. The roller tracks, the return hole and the rotary groove form a rolling circulation rotary channel. Roller tracks made of stainless steel are installed in the rolling circulation rotary channel.

[0007] The return hole is located above the rolling element raceway;

[0008] The guide rail is provided with a magnetic grating ruler or an optical grating ruler, and the slider is provided with a magnetic grating reading head corresponding to the magnetic grating ruler or an optical grating reading head corresponding to the optical grating ruler;

[0009] A linear motor stator is mounted on the guide rail, and a linear motor mover corresponding to the linear motor stator is provided on the slider. The motor mover is connected to the power supply.

[0010] According to some embodiments of the present invention, the linear motor actuator is embedded in the recess of the slider.

[0011] According to some embodiments of the present invention, the linear motor stator is fixedly mounted in the groove of the guide rail.

[0012] According to some embodiments of the present invention, the groove is provided with raised ribs that clamp the rolling element raceway.

[0013] According to some embodiments of the present invention, the rolling element is a ball, a roller, or a needle roller.

[0014] According to some embodiments of the present invention, anti-collision blocks are fixedly installed at both ends of the slider.

[0015] According to some embodiments of the present invention, the anti-collision block is a conical rubber block.

[0016] According to some embodiments of the present invention, the magnetic grating ruler or optical grating ruler is fixed to the outside of the guide rail.

[0017] According to some embodiments of the present invention, the guide rail consists of a base and a track disposed on the base.

[0018] According to some embodiments of the present invention, the magnetic grating reader or the optical grating reader is fixed to the outside of the slider.

[0019] According to an embodiment of the present invention, a guide rail embedded linear motor module has at least the following beneficial effects: The present invention eliminates the original lead screw for driving and guiding the slider, fixes the linear motor stator on the guide rail, and integrally seals the linear motor mover on the slider. This design makes the overall structure compact, makes reasonable use of space, and does not reduce the rigidity of the body. It maximizes the thrust in a smaller structure. The linear motor stator and the linear motor mover generate an alternating magnetic field, which drives the slider to achieve reciprocating linear motion. Compared with conventional linear motors, it has advantages such as higher thrust density, higher rigidity, higher response, and greater thrust. At the same time, the position information of the magnetic grating ruler or optical grating ruler fixed on the guide rail is read by a magnetic grating reader or optical grating reader to achieve precise positioning of the slider. In addition, the rolling element is made of stainless steel, and the return hole is located above the rolling element raceway, so that the rolling element does not pass through the magnetic field line range when rotating, ensuring that the rolling element is not magnetized and ensuring the smoothness of the rolling element rotation.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the installation structure according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the installation structure in another direction of the present invention;

[0024] Figure 3 This is a schematic diagram of the slider mounting structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the slider structure of the present invention with the return end cap removed. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0028] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0029] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0030] Reference Figure 1 A linear motor module with an embedded guide rail includes a guide rail 1 and a slider 2 mounted on the guide rail 1; the guide rail 1 guides the sliding direction of the slider 2; in addition, a connecting plate is provided on the slider 2, and the connecting plate can be fixed with a load by bolts.

[0031] Reference Figure 3The inner surface of the slider 2 and both sides of the guide rail 1 are provided with grooves. Rolling element raceways 23 made of carbon steel or stainless steel are embedded in these grooves. A return hole 22 is provided inside the slider 2. Return end caps 9 are fixedly installed at both ends of the slider 2. Return end caps 9 have rotation grooves connecting the rolling element raceways 23 and the return holes 22. The rolling element raceways 23, return holes 22, and rotation grooves form a rolling circulation rotation channel. Stainless steel rolling elements 3 are installed in the rolling circulation rotation channel. The rolling elements 3 can be balls, rollers, or needle rollers. In this embodiment, steel balls are used as the rolling elements 3. The use of steel balls facilitates the rolling connection between the slider 2 and the guide rail 1, and is suitable for high-precision and long-stroke applications. In addition, anti-collision blocks 8 are fixedly installed at both ends of the slider 2. The anti-collision blocks 8 are conical rubber blocks that can better absorb collision energy. The anti-collision blocks 8 limit the movement range of the slider 2, providing anti-collision protection and improving stability. The return hole 22 is located above the rolling element raceway 23, so that the rolling element does not pass through the magnetic field line range when rotating, ensuring that the rolling element is not magnetized and ensuring the smooth rotation of the rolling element.

[0032] To better install the rolling element raceway, the groove is provided with raised ribs that clamp the rolling element raceway.

[0033] Reference Figure 2 A magnetic scale or optical scale 4 is installed on the guide rail 1, and the magnetic scale or optical scale 4 is fixed to the outside of the guide rail 1 by bolts. A magnetic scale reading head or optical scale reading head 5 corresponding to the magnetic scale 4 is installed on the slider 2; the magnetic scale reading head or optical scale reading head 5 is fixed to the outside of the slider 2 by bolts. The magnetic scale or optical scale 4 is used to detect the displacement of the slider 2, and the magnetic scale reading head or optical scale reading head 5 on the slider 2 is used to read the displacement value of the slider 2.

[0034] Reference Figure 4 A linear motor stator 6 is mounted on the guide rail 1, and the linear motor stator 6 is parallel to the length direction of the guide rail 1. The linear motor stator 6 is a permanent magnet. A linear motor mover 7, corresponding to the linear motor stator 6, is integrally sealed on the slider 2. The linear motor mover 7 is a coil, and the coil is connected to the power supply. To avoid the trouble of installing the linear motor mover 7 on the slider 2, a recess 21 is provided at the bottom of the slider 2. The linear motor mover 7 is directly embedded and encapsulated in the recess 21 of the slider 2 by potting glue, making the structure of the slider 2 simple and compact, with fewer installation parts and reduced processing difficulty. In addition, a groove 11 is provided on the guide rail 1, and the linear motor stator 6 is fixedly installed in the groove 11 of the guide rail 1 by screws, thereby effectively ensuring the rigidity and precision of the guide rail 1.

[0035] In addition, the guide rail 1 consists of a base and a track mounted on the base. The guide rail 1 is embedded in the inner walls of both sides of the base 1 by screws, so that the guide rail 1 and the base form an integral structure.

[0036] This invention eliminates the need for a lead screw to guide the slider 2. The linear motor stator 6 is fixed on the guide rail 1, and the linear motor mover 7 is integrally sealed and installed on the slider 2. This design makes the overall structure compact, makes reasonable use of space, and does not reduce the rigidity of the body. It maximizes the thrust in a smaller structure. The linear motor stator 6 and the linear motor mover 7 generate an alternating magnetic field, which drives the slider 2 to achieve reciprocating linear motion. Compared with conventional linear motors, it has advantages such as higher thrust density, higher rigidity, higher response, and greater thrust. At the same time, the position information of the magnetic grating ruler or optical grating ruler 4 fixed on the guide rail 1 is read by the magnetic grating reader or optical grating reader 5 to achieve precise positioning of the slider 2, ensuring high-speed, high-acceleration, and high-precision linear motion of the linear motor module.

[0037] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A linear motor module embedded in a guide rail, characterized in that: Includes a guide rail (1) and a slider (2) mounted on the guide rail (1); The inner surface of the slider (2) and both sides of the guide rail (1) are provided with grooves. The grooves are fitted with rolling element raceways (23) made of carbon steel or stainless steel. The slider (2) is provided with a return hole (22). The left and right ends of the slider (2) are fixedly installed with return end caps (9). The return end caps (9) are provided with a rotary groove that connects the rolling element raceway (23) and the return hole (22). The rolling element raceway (23), the return hole (22) and the rotary groove form a rolling circulation rotary channel. The rolling element (3) made of stainless steel is installed in the rolling circulation rotary channel. The rolling element raceway (23) is located in the middle of the inner side of the guide rail (1), so that the slider (2) is embedded in the guide rail (1), and the return hole (22) is located above the rolling element raceway (23). The guide rail (1) is provided with a magnetic grating ruler or an optical grating ruler (4), and the slider (2) is provided with a magnetic grating reading head corresponding to the magnetic grating ruler or an optical grating reading head (5) corresponding to the optical grating ruler (4); A linear motor stator (6) is mounted on the guide rail (1), and a linear motor mover (7) corresponding to the linear motor stator (6) is provided on the slider (2). The motor mover (7) is connected to the power supply.

2. The guide rail embedded linear motor module according to claim 1, characterized in that: The linear motor actuator (7) is embedded in the recess (21) of the slider (2).

3. The guide rail embedded linear motor module according to claim 1, characterized in that: The linear motor stator (6) is fixedly installed in the groove (11) of the guide rail (1).

4. The guide rail embedded linear motor module according to claim 1, characterized in that: The groove is provided with a raised rib that clamps the rolling element raceway (23).

5. A guide rail embedded linear motor module according to claim 1, characterized in that: The rolling element (3) is a ball, roller or needle.

6. The guide rail embedded linear motor module according to claim 1, characterized in that: Anti-collision blocks (8) are fixedly installed at both ends of the slider (2).

7. A guide rail embedded linear motor module according to claim 6, characterized in that: The anti-collision block (8) is a conical rubber block.

8. A guide rail embedded linear motor module according to claim 1, characterized in that: The magnetic grating ruler or optical grating ruler (4) is fixed on the outside of the guide rail (1).

9. A guide rail embedded linear motor module according to claim 1, characterized in that: The guide rail (1) consists of a base and a track set on the base.

10. A guide rail embedded linear motor module according to claim 1, characterized in that: The magnetic grating reader or optical grating reader (5) is fixed on the outside of the slider (2).

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