A linear motor module

Abstract

The utility model discloses a linear motor module, including base, sliding guide, drive component, linear grating, sliding guide sets up in the opposite both sides of base, and drive component includes slide table and driving part, and slide table is connected on driving part, and slide table is connected with the mounting seat for installing detection piece, and detection piece reads the moving interval of slide table relative linear grating, and the mounting seat is located the outside of sliding guide, and driving part sets up on the recess of base and is used for driving slide table along sliding guide and carries out reciprocating linear displacement, the utility model discloses linear motor module, sets up in the opposite both sides of base with sliding guide, sets up detection piece and linear grating in the outside of slide rail, and the installation, debugging and replacement of slide rail and detection piece, linear grating are convenient, and detection piece reading is convenient, and the heat influence is effectively isolated simultaneously, and the influence of thermal expansion on the precision of guide rail, detection piece reading precision is reduced.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a linear motor module. Background Technology

[0002] Existing linear motors often mount sliding guides on the side walls of the base groove. This method, due to space constraints, makes installation, debugging, and maintenance of the sliding guides complex, potentially requiring disassembly of the drive unit or slide table, increasing maintenance difficulty. Furthermore, under heavy loads, the sliding guides on the side walls of the groove are prone to wear and deformation due to uneven or excessive stress. Heat generated by the drive unit can also be transferred to the sliding guides in the groove, causing thermal expansion and affecting the straightness and motion accuracy of the guides. On the other hand, in traditional designs, the encoder is integrated into the groove or slide table. The heat generated by movement can cause the relative position of the sensor and the scale to shift, affecting reading accuracy. Moreover, the heat generated by the drive unit's movement can cause thermal expansion of the entire module's internal structure, affecting the relative position of the sensor and the scale, thus reducing reading accuracy. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a linear motor module with a simple and stable structure, large load-bearing capacity, convenient installation, and beneficial reading of the test piece.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A linear motor module includes: a base with a groove; a sliding guide rail disposed on opposite sides of the base; a drive assembly including a slide table and a drive member, the slide table being connected to the drive member, a mounting base being connected to one side of the slide table, the mounting base being located outside the sliding guide rail, the mounting base being used to mount a detection member, the drive member being disposed on the groove, the drive member being used to drive the slide table to perform reciprocating linear displacement along the sliding guide rail; and a linear scale disposed below the mounting base, the linear scale being parallel to the sliding guide rail and located below the mounting base, the detection member reading the movement distance of the slide table relative to the linear scale during the displacement of the slide table.

[0006] In a preferred embodiment, L-shaped guide rail mounting positions are provided on both sides of the base, a first connecting hole is provided on the L-shaped guide rail mounting position, and a second connecting hole is provided on the side of the sliding guide rail. The first and second connecting holes are connected and fixed by a connector.

[0007] In a preferred embodiment, the driving component includes a mover and a plurality of stators, the stators being arranged sequentially in the groove, the mover being disposed on the stator, and the slide being connected to the mover. When the stator is energized, it drives the mover to move the slide together back to its original position.

[0008] In a preferred embodiment, a gap is provided between the stator and the sidewall of the groove.

[0009] In a preferred embodiment, a cover plate is provided between the top surface of the groove sidewall and the top surface of the stator, and the cover plate covers the gap.

[0010] In a preferred embodiment, each side of the sliding guide rail is provided with multiple sliding blocks. Each sliding block includes a support plate, a pulley, and two inverted triangular side plates. The support plate is disposed on the two opposite inverted triangular side plates, the pulley is connected between the two inverted triangular side plates, the pulley slides on the sliding guide rail, and the support plate is connected to the slide table.

[0011] In a preferred embodiment, the contact surface between the slide and the mover is flush with the top surface of the sliding block.

[0012] In a preferred embodiment, the mounting base includes a convex portion, a connecting portion, and a mounting portion. The convex portion conforms to the side of the slide table, the connecting portion connects the convex portion and the mounting portion, the connecting portion is fixed on the slide table, and the mounting portion faces the linear encoder. The mounting portion is used to mount the sensor.

[0013] In a preferred embodiment, the linear grid ruler is provided with a plurality of protrusions, which are arranged at uniform intervals.

[0014] In a preferred embodiment, the linear motor module further includes a connector, a cable is provided inside the connector, and multiple interfaces are provided on the outside of the connector, with the linear scale mounted on the connector.

[0015] The beneficial effects of this utility model are:

[0016] 1. The linear motor module disclosed in this utility model has sliding guide rails set on opposite sides of the base, that is, independent of the base, which facilitates direct installation, debugging and maintenance. The sliding guide rails can share the weight of the slide table with the drive components, which disperses the force, improves the load-bearing capacity, and reduces the risk of wear and deformation of the sliding guide rails. Moreover, in this way, the sliding guide rails are far away from the drive components, which reduces heat conduction and reduces the impact of thermal expansion on the accuracy of the guide rails.

[0017] 2. The linear motor module disclosed in this utility model sets the detection component and the linear scale outside the slide rail, independent of the slide table and sliding guide rail structure, which facilitates installation, debugging and replacement, and effectively isolates the heat influence, reduces the heat transfer path, and reduces the impact of thermal expansion on the reading accuracy of the detection component. Furthermore, the linear scale is set below the mounting base, so that the detection component can conveniently and quickly read its movement distance relative to the linear scale. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the linear motor module of this utility model;

[0020] Figure 2 This is a schematic diagram of the linear motor module drive assembly structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the mounting base structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the sliding block structure of this utility model. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "below," "on one side," "first," "second," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] See Figure 1 , Figure 2A linear motor module includes: a base 100, a sliding guide rail 200, a drive assembly 300, and a linear scale 400. The base 100 has a groove 110. The sliding guide rail 200 is disposed on opposite sides of the base 100. The drive assembly 300 includes a slide 310 and a drive member 320. The slide 310 is connected to the drive member 320. A mounting base 311 is connected to one side of the slide 310 and is located outside the sliding guide rail 200. The mounting base 311 is used to mount a detection component. The drive member 320 is disposed in the groove 110 and is used to drive the slide 310 to perform reciprocating linear displacement along the sliding guide rail 200. The linear scale 400 is parallel to the sliding guide rail 200 and located below the mounting base 311. The detection component mounted on the mounting base 311 reads the movement distance of the slide 310 relative to the linear scale 400 as the slide 310 moves.

[0026] It should be noted that, as Figure 1 , Figure 2 As shown, sliding guide rails 200 are mounted on opposite sides of the base 100. A slide table 310 is mounted on the drive component 320. The drive component 320 drives the slide table 310 to perform reciprocating linear displacement motion on the sliding guide rails 200. In this way, the sliding guide rails 200 on both sides ensure the stability of the slide table 310's movement. Furthermore, the drive component 320 and the two guide rails share the load, improving the load-bearing capacity of the slide table 310. The sliding guide rails 200 are located outside the groove 110, providing independent installation space, facilitating the installation, adjustment, and maintenance of the sliding guide rails 200. They are also kept away from the heat generated by the drive component 320, reducing the impact of thermal expansion on the guide rail's accuracy.

[0027] Compared to the traditional design of setting the sliding guide rails 200 on both sides of the base 100, the arrangement of the sliding guide rails 200 on both sides of the groove 110 avoids the difficulty of installation and maintenance due to space constraints, which may require the removal of the drive component 320 for maintenance. On the other hand, it avoids the sliding guide rails 200 on both sides of the groove 110 from being easily worn or deformed due to excessive force when the slide table 310 is under heavy load, thus preventing the sliding guide rails 200 from affecting the movement accuracy and stability of the slide table 310.

[0028] A mounting base 311 is provided on the outside of the slide table 310 to mount the detection component. A linear scale 400 is provided below the mounting base 311. That is to say, the detection component and the linear scale 400 are set on the outside of the slide rail, independent of the slide table 310 and the sliding guide rail 200 structure, which facilitates installation. Moreover, the slide table 310 or the slide rail does not need to be disassembled during debugging or replacement, and can be operated directly, which improves maintenance efficiency and effectively isolates the heat effect and improves reading accuracy. Compared with the design of integrating the detection component in the groove 110 or on the slide table 310, it can effectively avoid the thermal expansion of the entire module's internal structure caused by the heat generated by the movement, which may affect the relative position of the detection component and the scale.

[0029] Furthermore, to improve the installation efficiency and accuracy of the sliding guide rail 200, L-shaped guide rail mounting positions 120 are provided on both sides of the base 100. The L-shaped guide rail mounting positions 120 are provided with a first connecting hole (not shown in the figure), and the sliding guide rail 200 is provided with a second connecting hole 210 on its side. The first and second connecting holes 210 are connected and fixed by a connector.

[0030] It should be noted that the vertical and horizontal surfaces of the L-shaped guide rail mounting position 120 provide positioning and support for the sliding guide rail 200 in two directions. This not only ensures the positional accuracy of the sliding guide rail 200 in the vertical and horizontal directions during installation, but also provides stable support for the sliding guide rail 200, reducing the skewing or deformation of the sliding guide rail 200 caused by installation errors, and enhancing the anti-torsional and anti-sway capabilities of the sliding guide rail 200, thereby improving the motion accuracy of the slide table 310. Furthermore, this embodiment adopts an I-shaped sliding guide rail 200, which has an overall square structure. The L-shaped guide rail mounting position 120 is provided with a first connecting hole, and the side of the sliding guide rail 200 is provided with a second connecting hole 210. During installation, the sliding guide rail 200 is placed on the L-shaped guide rail mounting position 120, and the first and second connecting holes are aligned for connection and assembly. This structure provides vertical support and lateral locking for the sliding guide rail 200, ensuring the accuracy of the relative position of the sliding guide rail 200 and the base 100.

[0031] In this embodiment, the driving component 320 includes a mover 321 and a plurality of stators 322. The stators 322 are arranged sequentially in the groove 110. The mover 321 is disposed on the stator 322 and the slide 310 is connected to the mover 321. When the stator 322 is energized, the drive mover 321 drives the slide 310 to move back to the reset position.

[0032] It should be noted that, as Figure 1 As shown, the stator 322 is arranged within the groove 110, and the mover 321 is located above the stator 322. The heat generated when the stator 322 is energized is mainly concentrated within the groove 110. The mover 321, being far from the heat source, is not directly exposed to the heat generated by the stator 322 and is less affected by thermal expansion, thus reducing motion errors caused by thermal deformation. In other words, this design enhances heat dissipation and reduces motion errors caused by the thermal expansion of the drive component 320. Furthermore, since the stator 322 is sequentially positioned within the groove 110, interference from the mover 321 does not need to be considered during installation, simplifying the positioning and fixing process of the stator 322. The mover 321 is independent of the groove 110 and can be independently upgraded and replaced, compatible with different types of sliding guide rails 200 and sliding tables 310, improving the system's scalability.

[0033] To further improve heat dissipation, a gap is provided between the stator 322 and the side wall of the groove 110.

[0034] It should be noted that in the linear motor module of this embodiment, the stator 322 generates a magnetic field when energized, driving the mover 321 to move. During this movement, heat is generated. If the stator 322 is in close contact with the sidewall of the groove 110, the heat will be rapidly conducted to the base 100, potentially causing the base 100 to overheat. The gap between the stator 322 and the sidewall of the groove 110 forms an air gap, promoting natural convection heat dissipation and reducing the temperature of the stator 322. This helps ensure that the stator 322 operates within a suitable temperature range, improving the efficiency and stability of the linear motor module, reducing the risk of performance degradation or even damage due to overheating, and thus indirectly maintaining the stability of the magnetic field strength. It is also understood that the gap provides operational space for the installation and removal of the stator 322.

[0035] Furthermore, a cover plate 111 is provided between the top surface of the side wall of the groove 110 and the top surface of the stator 322, and the cover plate 111 covers the gap.

[0036] It should be noted that if the gap between the stator 322 and the groove 110 is exposed to the external environment, it may be susceptible to contaminants such as dust, oil, and cutting fluid, leading to electrical short circuits, decreased insulation performance, or mechanical jamming. The cover plate 111 serves as a physical barrier to isolate contaminants and protect the stator 322 and its electrical connections. Furthermore, by selecting a material and structure with high thermal conductivity for the cover plate 111, heat dissipation efficiency can be optimized, preventing the heat generated by the stator 322 during power-on from being dissipated disorderly in the gap area, which could lead to localized overheating.

[0037] To further improve the load-bearing capacity, multiple sliding blocks 220 are provided on each side of the sliding guide rail 200. Each sliding block 220 includes a support plate 221, a pulley 222, and two inverted triangular side plates 223. The support plate 221 is set on the two opposite inverted triangular side plates 223, and the pulley 222 is connected between the two inverted triangular side plates 223. The pulley 222 rolls on the sliding guide rail 200, and the support plate 221 is connected to the slide table 310.

[0038] It should be noted that, generally, the slide table 310 uses a square sliding block connected to each side. This design, however, uses multiple sliding blocks 220 on each side of the sliding guide rail 200 to connect the slide table 310. This evenly distributes the load across multiple contact surfaces of the sliding blocks 220, reducing the force on a single sliding block 220 and preventing deformation or damage caused by localized overload of the sliding guide rail 200. The load-bearing capacity of the multiple sliding blocks 220 also reduces bending or torsion of the slide table 310 under load, improving overall rigidity, dynamic response speed, and stability, meeting the requirements of high precision or heavy load conditions. Furthermore, if a single sliding block 220 fails, the multiple sliding block 220 design can still maintain the basic function of the slide table, preventing system downtime and improving reliability. Specifically, in this embodiment, each side of the sliding guide rail 200 is provided with three sliding blocks. Compared to the traditional square sliding blocks that use ball bearings or rollers, this embodiment uses the aforementioned sliding block structure, such as... Figure 4 As shown, the support plate 221, serving as a connector between the slide table 310 and the sliding block 220, distributes the load during the movement of the sliding block 220 and can independently withstand lateral forces and bending moments, improving the movement accuracy of the slide table 310. The inverted triangular side plates 223 enhance the rigidity and anti-overturning capacity of the overall structure, keeping the support plate 221 stable under load and reducing vibration and deformation. The pulley 222 connects the two inverted triangular side plates 223, employing sliding friction to reduce frictional resistance, improve movement efficiency, and reduce wear. The entire slider is a pulley-type structure, ensuring structural strength and stability while increasing the contact area with the slide table 310 and decreasing the contact area with the sliding guide rail 200, resulting in low frictional resistance and rapid response.

[0039] Preferably, the support plate 221 and the inverted triangular side plate 223 are integrated into one design, which further improves the stability of the entire slider and reduces manufacturing costs.

[0040] To further improve motion accuracy, the contact surface between the slide table 310 and the mover 321 is flush with the top surface of the sliding block 220. It should be noted that flushing the contact surface between the slide table 310 and the mover 321 with the top surface of the sliding block 220 eliminates height differences, preventing bumps or impacts caused by steps or drops during the slide table 310's movement. This ensures the continuity and stability of the motion trajectory, reduces the vibration amplitude of the slide table 310 when passing through the sliding block 220, and is particularly suitable for high-speed or high-precision scenarios. Furthermore, this structure ensures that the load of the slide table 310 is evenly distributed on the sliding block 220 and the mover 321, avoiding deformation or wear caused by localized stress concentration.

[0041] See Figure 3The mounting base 311 includes a convex part 311a, a connecting part 311b, and a mounting part 311c. The convex part 311a fits against the side of the slide table 310. The connecting part 311b connects the convex part 311a and the mounting part 311c. The connecting part 311b is fixed on the slide table 310. The mounting part 311c faces the linear scale 400 and is used to mount the sensor.

[0042] The convex portion 311a increases the contact area with the slide table 310, providing a more reliable fixing effect and reducing loosening or displacement of the mounting base 311 due to vibration, impact, and other factors during use. Moreover, the protruding part of the convex shape can precisely match the matching groove 110 or positioning hole on the mounting fixture, ensuring that the mounting base 311 can be accurately positioned in the predetermined position during installation, which helps to ensure the accuracy of sensor measurement. The connecting portion 311b can ensure that the connection between the mounting base 311 and the slide table 310 is firm and reliable, withstand various forces and torques brought by the slide table 310 and the sensor mounted on it, and buffer and absorb vibrations and impacts generated during movement to a certain extent, reducing the impact on the sensor. It is understood that the mounting portion 311c can be specially designed according to the size of the sensor and installation requirements, providing a suitable mounting interface 510 and fixing method to ensure that the sensor can be firmly installed on the mounting base 311, and the installation process is simple and easy.

[0043] The modular design of the mounting base 311 allows for independent design, manufacturing, and replacement of different parts, improving its maintainability and scalability. For example, if the sensor needs to be upgraded or replaced, only the mounting part 311c needs to be adjusted accordingly, without replacing the entire mounting base 311; if the fixing method needs to be changed, only the convex part 311a or the connecting part 311b needs to be adjusted.

[0044] See Figure 2 The linear grid ruler 400 is provided with several protrusions 410, which are evenly spaced.

[0045] It should be noted that the bumps 410 serve as the physical reference of the scale. A fixed grid pitch unit is formed between every two evenly spaced bumps 410. This design reduces grid pitch errors caused by material deformation or environmental interference, ensuring long-term grid pitch stability. The uniform spacing of the bumps 410 allows the sensor to quickly and accurately capture the scale's movement during reading, reducing dynamic errors in the reading head. Especially in high-speed motion or frequent start-stop scenarios, the bump 410 structure significantly improves the sensor's dynamic response performance. Furthermore, the spacing of the bumps 410 provides redundant measurement references for the sensor. Even if some bumps 410 experience signal abnormalities due to wear or contamination, the sensor can still compensate for these errors using signals from other bumps 410, ensuring the continuity and accuracy of the readings.

[0046] The linear motor module also includes a connector 500, which houses the cables and has multiple interfaces 510 on its outer side. A linear scale 400 is mounted on the connector 500. It should be noted that the connector 500 integrates the cables, serial port, and scale into a single unit, reducing the space occupied by discrete components and improving the system's compactness and aesthetics. The connector 500 can be independently disassembled and replaced, reducing maintenance costs and time and improving the system's maintainability.

[0047] Understandably, in some large and complex automation systems, linear modules and their linear detection components may need to communicate with multiple devices or subsystems. Multiple sets of interfaces 510 can easily connect to different subsystems, enabling parallel data transmission and real-time sharing. In applications with high system reliability requirements, setting multiple sets of interfaces 510 can provide communication redundancy. When some interfaces 510 fail, the system can automatically switch to other normal interfaces 510 for communication, ensuring normal data transmission and stable system operation.

[0048] The base 100 of the linear motor module is equipped with limiting devices at both ends to limit the movement stroke of the mover 321.

[0049] Limiting devices prevent collisions or detachment from the guide rail, protecting equipment and personnel safety. Understandably, the limiting devices can be equipped with sensors (such as infrared sensors or industrial vision devices) to accurately set the movement range of the mover 321, reduce positioning deviations caused by stroke errors, and provide feedback to the control system for linkage control, further improving system reliability.

[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A linear motor module, characterized in that, include: A base, wherein a groove is provided on the base; A sliding guide rail is provided on opposite sides of the base; A driving assembly includes a slide table and a driving member. The slide table is connected to the driving member, and a mounting base is connected to one side of the slide table. The mounting base is located outside a sliding guide rail and is used to mount a detection element. The driving member is disposed in the groove and is used to drive the slide table to perform reciprocating linear displacement along the sliding guide rail. A linear scale is disposed below the mounting base, parallel to the sliding guide rail and located below the mounting base. The detection element reads the movement distance of the sliding table relative to the linear scale as the sliding table moves.

2. The linear motor module according to claim 1, characterized in that, Both sides of the base are provided with L-shaped guide rail mounting positions. The L-shaped guide rail mounting positions are provided with first connecting holes, and the sliding guide rail side is provided with second connecting holes. The first and second connecting holes are connected and fixed by connectors.

3. The linear motor module according to claim 2, characterized in that, The driving component includes a mover and several stators, which are arranged sequentially in the groove. The mover is disposed on the stator and connected to the slide. When the stator is energized, it drives the mover to move the slide together back to its original position.

4. The linear motor module according to claim 3, characterized in that, A gap is provided between the stator and the sidewall of the groove.

5. The linear motor module according to claim 4, characterized in that, A cover plate is provided between the top surface of the groove sidewall and the top surface of the stator, and the cover plate covers the gap.

6. The linear motor module according to claim 5, characterized in that, Multiple sliding blocks are provided on each side of the sliding guide rail. Each sliding block includes a support plate, a pulley, and two inverted triangular side plates. The support plate is disposed on the two opposite inverted triangular side plates. The pulley is connected between the two inverted triangular side plates and slides on the sliding guide rail. The support plate is connected to the slide table.

7. The linear motor module according to claim 6, characterized in that, The contact surface between the slide and the moving part is flush with the top surface of the sliding block.

8. The linear motor module according to claim 1, characterized in that, The mounting base includes a convex part, a connecting part, and a mounting part. The convex part fits against the side of the slide table, the connecting part connects the convex part and the mounting part, the connecting part is fixed on the slide table, and the mounting part faces the linear scale. The mounting part is used to mount the sensor.

9. The linear motor module according to claim 1, characterized in that, The linear grid ruler is provided with a number of protrusions, which are evenly spaced.

10. The linear motor module according to claim 1, characterized in that, It also includes a connector, a cable is provided inside the connector, and multiple sets of interfaces are provided on the outside of the connector. The linear scale is mounted on the connector.

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