Single-shaft linear motion structure

Abstract

The utility model relates to the technical field of linear motion modules, in particular to a single-shaft linear motion structure, which comprises a base, an upper cover, a linear motor module and a first crossed roller guide rail, and is characterized in that a linear motor stator is arranged at one end of the base, and a linear motor rotor is arranged at one end of the upper cover; the first crossed roller guide rail comprises a first upper guide rail, a first lower guide rail and a first roller retainer, the first upper guide rail is arranged at the other end of the upper cover, the first lower guide rail is arranged at the other end of the base, and the first roller retainer is arranged between the first upper guide rail and the first lower guide rail. Efficient and accurate transmission of a single-shaft linear motion structure is achieved, the linear motor mover slides in the linear motor stator, the motion process is smooth, the first crossed roller guide rail provides the high-rigidity and low-friction guiding effect, the motion precision and stability are improved, and the linear motor rotor can be driven by the first crossed roller guide rail. And the requirements of high-speed and high-precision dispensing and surface mounting equipment can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of linear motion modules, in particular to a single-axis linear motion structure. Background Art

[0002] With the continuous improvement of industrial automation level, the demand for precise positioning and high-efficiency transmission is increasing day by day. Among many transmission mechanisms, the single-axis linear motion structure has been widely used in the fields of precision machining, semiconductor manufacturing, optical detection, etc. due to its simple structure, high precision, high speed and other characteristics.

[0003] In the prior art, the common single-axis linear motion structures mostly adopt the method of servo motor plus ball screw or rack and pinion to realize linear motion. Although this method can meet some basic requirements, it is easy to generate vibration and noise during high-speed operation, and due to mechanical wear, its positioning accuracy will be affected after long-term use, making it difficult to meet the requirements of high-speed and high-precision dispensing and chip mounter equipment. Summary of the Utility Model

[0004] The utility model aims to solve at least the technical problems existing in the prior art. For this purpose, the utility model provides a single-axis linear motion structure, which adopts a linear motor module and a crossed roller guide rail to realize efficient and stable linear motion control, with high positioning accuracy, and is more capable of meeting the requirements of high-speed and high-precision dispensing and chip mounter equipment.

[0005] A single-axis linear motion structure according to some embodiments of the utility model includes a base, an upper cover, a linear motor module and a first crossed roller guide rail. The linear motor module includes a linear motor mover and a linear motor stator. The linear motor stator is arranged at one end of the base, and the linear motor mover is arranged at one end of the upper cover. The linear motor mover is slidably arranged in the linear motor stator. The first crossed roller guide rail includes a first upper guide rail, a first lower guide rail and a first roller cage. The first upper guide rail is arranged at the other end of the upper cover, the first lower guide rail is arranged at the other end of the base, and the first roller cage is arranged between the first upper guide rail and the first lower guide rail.

[0006] A single-axis linear motion structure according to some embodiments of the utility model has at least the following beneficial effects:

[0007] In the present utility model, the stator of the linear motor is arranged at one end of the base, the mover of the linear motor is arranged at one end of the upper cover, the mover of the linear motor is slidably arranged in the stator of the linear motor, the first crossed roller guide rail includes a first upper guide rail, a first lower guide rail and a first roller cage, the first upper guide rail is arranged at the other end of the upper cover, the first lower guide rail is arranged at the other end of the base, and the first roller cage is arranged between the first upper guide rail and the first lower guide rail, realizing efficient and precise transmission of the single-axis linear motion structure. The sliding of the mover of the linear motor in the stator of the linear motor is smooth during the movement process, and the first crossed roller guide rail provides a guiding function with high rigidity and low friction, improving the motion accuracy and stability, and being more capable of meeting the requirements of high-speed and high-precision dispensing and chip mounter equipment.

[0008] In a single-axis linear motion structure according to some embodiments of the present utility model, a reading head is arranged on the top of the base, and a grating scale is arranged on the side wall of the upper cover, and the reading head is arranged corresponding to the grating scale.

[0009] In a single-axis linear motion structure according to some embodiments of the present utility model, an avoidance notch is formed in the front end of the top of the upper cover along the sliding direction of the mover of the linear motor, the grating scale is arranged on the side wall of the avoidance notch, an installation block is arranged on the top of the base, the reading head is arranged on the installation block, and the reading head extends into the avoidance notch.

[0010] In a single-axis linear motion structure according to some embodiments of the present utility model, a limiting groove is formed in the rear end of the upper cover along the sliding direction of the mover of the linear motor, and an anti-collision rubber block is arranged on the top of the base, and the anti-collision rubber block extends into the limiting groove.

[0011] In a single-axis linear motion structure according to some embodiments of the present utility model, a first connecting plate is arranged on one side of the base, the stator of the linear motor and the first lower guide rail are respectively arranged at the front and rear ends of the first connecting plate, a second connecting plate is arranged on one side of the upper cover, and the mover of the linear motor and the first upper guide rail are respectively arranged at the front and rear ends of the second connecting plate.

[0012] In a single-axis linear motion structure according to some embodiments of the present utility model, a second crossed roller guide rail is arranged between the first connecting plate and the second connecting plate, and the second crossed roller guide rail is located at the bottom of the first crossed roller guide rail.

[0013] In a single-axis linear motion structure according to some embodiments of the present utility model, the second crossed roller guide rail includes a second upper guide rail, a second lower guide rail and a second roller cage, the second upper guide rail is connected to the first connecting plate, the second lower guide rail is connected to the second connecting plate, and the second roller cage is arranged between the second upper guide rail and the second lower guide rail.

[0014] A single-axis linear motion structure according to some embodiments of the present invention, a spacer is convexly provided at one end of the first connecting plate close to the second connecting plate, and the first crossed roller guide rail and the second crossed roller guide rail are respectively arranged at the upper and lower ends of the spacer.

[0015] A single-axis linear motion structure according to some embodiments of the present invention, a connecting piece is provided at the front end of the upper cover, an induction piece is provided at the bottom of the connecting piece, a connecting seat is provided at the front end of the base, a photoelectric switch is provided at the top of the connecting seat, and the photoelectric switch is arranged corresponding to the induction piece.

[0016] A single-axis linear motion structure according to some embodiments of the present invention, the induction piece extends into the linear motor stator.

[0017] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present invention Figure 1 .

[0020] Figure 2 is a schematic structural diagram of an embodiment of the present invention Figure 2 .

[0021] Figure 3 is a schematic structural diagram of an embodiment of the present invention Figure 3 .

[0022] Figure 4 is a schematic structural diagram of the connecting piece of an embodiment of the present invention.

[0023] Reference numerals: 1, base; 2, upper cover; 3, linear motor module; 4, first crossed roller guide rail; 5, linear motor mover; 6, linear motor stator; 7, first upper guide rail; 8, first lower guide rail; 9, first roller cage; 10, reading head; 11, grating scale; 12, avoidance notch; 13, mounting block; 14, limiting groove; 15, anti-collision rubber block; 16, first connecting plate; 17, second connecting plate; 18, second crossed roller guide rail; 19, second upper guide rail; 20, second lower guide rail; 21, second roller cage; 22, spacer; 23, connecting piece; 24, induction piece; 25, connecting seat; 26, photoelectric switch; 27, spring. Detailed implementation manners

[0024] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the 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 by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, left, right, front, back, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the module or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, if the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0027] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0028] As Figures 1-4 shown, the embodiments of the present utility model provide.

[0029] A single-axis linear motion structure, including a base 1, an upper cover 2, a linear motor module 3, and a first crossed roller guide 4. The linear motor module 3 includes a linear motor mover 5 and a linear motor stator 6. The linear motor stator 6 is arranged at one end of the base 1, and the linear motor mover 5 is arranged at one end of the upper cover 2. The linear motor mover 5 is slidably arranged in the linear motor stator 6. The first crossed roller guide 4 includes a first upper guide rail 7, a first lower guide rail 8, and a first roller cage 9. The first upper guide rail 7 is arranged at the other end of the upper cover 2, the first lower guide rail 8 is arranged at the other end of the base 1, and the first roller cage 9 is arranged between the first upper guide rail 7 and the first lower guide rail 8.

[0030] In this utility model, the stator 6 of the linear motor is arranged at one end of the base 1, the mover 5 of the linear motor is arranged at one end of the upper cover 2, the mover 5 of the linear motor is slidably arranged in the stator 6 of the linear motor. The first crossed roller guide 4 includes a first upper guide rail 7, a first lower guide rail 8 and a first roller cage 9. The first upper guide rail 7 is arranged at the other end of the upper cover 2, the first lower guide rail 8 is arranged at the other end of the base 1, and the first roller cage 9 is arranged between the first upper guide rail 7 and the first lower guide rail 8, realizing the efficient and precise transmission of the single-axis linear motion structure. The sliding of the mover 5 of the linear motor in the stator 6 of the linear motor has a smooth motion process. The first crossed roller guide 4 provides a guiding function with high rigidity and low friction, improves the motion accuracy and stability, and can better meet the requirements of high-speed and high-precision dispensing and chip mounter equipment.

[0031] For a single-axis linear motion structure described in this embodiment, a reading head 10 is arranged on the top of the base 1, and a grating scale 11 is arranged on the side wall of the upper cover 2, and the reading head 10 is arranged corresponding to the grating scale 11. Specifically, by arranging the reading head 10 on the top of the base 1 and cooperating with the grating scale 11 on the side wall of the upper cover 2, the precise position feedback of the linear motion is realized, the positioning accuracy and reliability of the system are enhanced, and it is applicable to application occasions that require high-precision positioning.

[0032] For a single-axis linear motion structure described in this embodiment, an avoidance notch 12 is opened at the front end of the top of the upper cover 2 along the sliding direction of the mover 5 of the linear motor. The grating scale 11 is arranged on the side wall of the avoidance notch 12. An installation block 13 is arranged on the top of the base 1, and the reading head 10 is arranged on the installation block 13, and the reading head 10 extends into the avoidance notch 12. Specifically, by opening the avoidance notch 12 at the front end of the top of the upper cover 2 and installing the grating scale 11 therein, and at the same time arranging the reading head 10 on the installation block 13 that can extend into the avoidance notch 12, it is convenient for assembly and maintenance and ensures the accuracy of reading.

[0033] For a single-axis linear motion structure described in this embodiment, a limiting groove 14 is opened at the rear end of the upper cover 2 along the sliding direction of the mover 5 of the linear motor. An anti-collision rubber block 15 is arranged on the top of the base 1, and the anti-collision rubber block 15 extends into the limiting groove 14. Specifically, by opening the limiting groove 14 at the rear end of the upper cover 2 and arranging the anti-collision rubber block 15 on the top of the base 1, this design can limit the motion of the upper cover 2. When reaching the limit position, the anti-collision rubber block 15 abuts against the inner wall of the limiting groove 14. At the same time, the anti-collision rubber block 15 plays a buffering role, effectively buffers, and prolongs the service life of the equipment.

[0034] A single-axis linear motion structure according to this embodiment, a first connecting plate 16 is provided on one side of the base 1, the linear motor stator 6 and the first lower guide rail 8 are respectively arranged at the front and rear ends of the first connecting plate 16, a second connecting plate 17 is provided on one side of the upper cover 2, and the linear motor mover 5 and the first upper guide rail 7 are respectively arranged at the front and rear ends of the second connecting plate 17. Specifically, by respectively arranging the first connecting plate 16 and the second connecting plate 17 on both sides of the base 1 and the upper cover 2 and fixing the linear motor module 3 and the guide rail system thereon, this modular design not only facilitates assembly and disassembly, but also improves the overall rigidity and reliability of the system.

[0035] A single-axis linear motion structure according to this embodiment, a second crossed roller guide rail 18 is arranged between the first connecting plate 16 and the second connecting plate 17, and the second crossed roller guide rail 18 is located at the bottom of the first crossed roller guide rail 4. Specifically, adding the second crossed roller guide rail 18 between the first connecting plate 16 and the second connecting plate 17 further enhances the stability of the system, reduces vibration during movement, and helps to maintain a high movement accuracy.

[0036] A single-axis linear motion structure according to this embodiment, the second crossed roller guide rail 18 includes a second upper guide rail 19, a second lower guide rail 20 and a second roller cage 21, the second upper guide rail 19 is connected to the first connecting plate 16, the second lower guide rail 20 is connected to the second connecting plate 17, and the second roller cage 21 is arranged between the second upper guide rail 19 and the second lower guide rail 20. Specifically, the above settings provide additional support points, which helps to disperse the load, reduce stress concentration, and improve the load-bearing capacity of the system.

[0037] A single-axis linear motion structure according to this embodiment, a spacer 22 protrudes from one end of the first connecting plate 16 close to the second connecting plate 17, and the first crossed roller guide rail 4 and the second crossed roller guide rail 18 are respectively arranged at the upper and lower ends of the spacer 22. Specifically, the above settings arrange the two layers of guide rails on different surfaces of the spacer 22, making full use of space resources, enhancing the integrity of the structure, and also being beneficial to improving the parallelism and stability of movement.

[0038] A single-axis linear motion structure according to this embodiment, a connecting piece 23 is provided at the front end of the upper cover 2, an induction piece 24 is provided at the bottom of the connecting piece 23, a connecting seat 25 is provided at the front end of the base 1, a photoelectric switch 26 is provided at the top of the connecting seat 25, and the photoelectric switch 26 is arranged corresponding to the induction piece 24. Specifically, the above settings are used to detect the limit position or specific position of the linear motor mover 5, so as to realize automatic stop or switching operations, enhancing the intelligent level of the system.

[0039] A single-axis linear motion structure according to this embodiment, the induction sheet 24 extends into the linear motor stator 6. Specifically, the induction sheet 24 can slide in the linear motor stator 6 along with the linear motor mover 5, and cleverly avoids positions, reducing the overall volume.

[0040] In some embodiments, a spring 27 is provided between the first connecting plate 16 and the second connecting plate 17 to assist the upper cover 2 in returning to its position.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A single-axis linear motion structure, characterized in that: It includes a base, an upper cover, a linear motor module and a first crossed roller guide. The linear motor module includes a linear motor mover and a linear motor stator. The linear motor stator is arranged at one end of the base, and the linear motor mover is arranged at one end of the upper cover. The linear motor mover is slidably arranged in the linear motor stator. The first crossed roller guide includes a first upper guide rail, a first lower guide rail and a first roller cage. The first upper guide rail is arranged at the other end of the upper cover, the first lower guide rail is arranged at the other end of the base, and the first roller cage is arranged between the first upper guide rail and the first lower guide rail.

2. The single-axis linear motion structure according to claim 1, characterized in that: A reading head is arranged on the top of the base, and a grating scale is arranged on the side wall of the upper cover. The reading head is arranged corresponding to the grating scale.

3. The single-axis linear motion structure according to claim 2, wherein: A clearance notch is formed in the front end of the top of the upper cover along the sliding direction of the linear motor mover. The grating scale is arranged on the side wall of the clearance notch. An installation block is arranged on the top of the base, and the reading head is arranged on the installation block. The reading head extends into the clearance notch.

4. A single-axis linear motion structure according to claim 1, characterized in that: A limiting groove is formed in the rear end of the upper cover along the sliding direction of the linear motor mover. An anti-collision rubber block is arranged on the top of the base, and the anti-collision rubber block extends into the limiting groove.

5. A single-axis linear motion structure according to claim 1, characterized in that: A first connecting plate is arranged on one side of the base. The linear motor stator and the first lower guide rail are respectively arranged at the front and rear ends of the first connecting plate. A second connecting plate is arranged on one side of the upper cover. The linear motor mover and the first upper guide rail are respectively arranged at the front and rear ends of the second connecting plate.

6. The single-axis linear motion structure according to claim 5, wherein: A second crossed roller guide is arranged between the first connecting plate and the second connecting plate. The second crossed roller guide is located at the bottom of the first crossed roller guide.

7. A single-axis linear motion structure according to claim 6, characterized in that: The second crossed roller guide includes a second upper guide rail, a second lower guide rail and a second roller cage. The second upper guide rail is connected to the first connecting plate, the second lower guide rail is connected to the second connecting plate, and the second roller cage is arranged between the second upper guide rail and the second lower guide rail.

8. A uniaxial linear motion structure according to claim 6, characterized in that: A partition block protrudes from one end of the first connecting plate close to the second connecting plate. The first crossed roller guide and the second crossed roller guide are respectively arranged at the upper and lower ends of the partition block.

9. A uniaxial linear motion structure according to claim 1, characterized in that: A connecting piece is arranged at the front end of the upper cover, and an induction piece is arranged at the bottom of the connecting piece. A connecting seat is arranged at the front end of the base, and a photoelectric switch is arranged on the top of the connecting seat. The photoelectric switch is arranged corresponding to the induction piece.

10. A single-axis linear motion structure according to claim 9, characterized in that: The induction piece extends into the linear motor stator.

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