Arc motor with reduced thermal expansion effects

Abstract

The utility model discloses a kind of arc motors reducing the influence of thermal expansion, including base, drive module and bearing table, base side is arc-shaped aperture, arc-shaped guide rail and arc-shaped mounting seat are provided on base, arc-shaped guide rail is set to the edge of arc-shaped aperture, arc-shaped mounting seat is set to the side of arc-shaped guide rail away from arc-shaped aperture, drive module includes stator assembly and rotor assembly, stator assembly is provided with avoiding slot, when electrified, rotor assembly reciprocating moves in avoiding slot, when rotor assembly moves, drive bearing table to slide on arc-shaped guide rail.The utility model arc-shaped guide rail is independent of thermal expansion source, its shape and position are basically not affected, can continuously provide stable, accurate arc-shaped movement track for bearing table, to ensure the stability and high accuracy of bearing table in movement process.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a circular arc motor that reduces the effects of thermal expansion. Background Technology

[0002] In traditional designs, the platform is mounted on the moving part assembly, and the guide rail is usually placed on one or both sides of the moving part assembly. When the equipment is running, the drive module will generate thermal expansion. Since the guide rail is closely connected to the moving part assembly, thermal expansion will cause the guide rail to deform, such as changing parameters like straightness and parallelism. This will interfere with the movement trajectory of the platform, causing the platform to move unstably, resulting in swaying, deviation, and other issues. This will seriously affect the movement accuracy and make it difficult to meet the requirements of high-precision operation. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a circular arc motor with a simple structure and a support platform and arc-shaped guide rail that are independent of the thermal expansion source.

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

[0005] An arc motor for reducing the effects of thermal expansion includes: a base, a drive module, and a support platform. One side of the base has an arc-shaped notch. An arc-shaped guide rail and an arc-shaped mounting base are provided on the base. The arc-shaped guide rail is located at the edge of the arc-shaped notch, and the arc-shaped mounting base is located on the side of the arc-shaped guide rail opposite to the arc-shaped notch. The drive module includes a stator assembly and a mover assembly. The stator assembly has a clearance groove. The opening of the clearance groove is aligned with the edge of the arc-shaped mounting base facing the arc-shaped guide rail. A first magnetic group and a second magnetic group are symmetrically arranged on the upper and lower inner walls of the clearance groove. The mover assembly includes a coil module and a coil fixing block. One end of the coil module is connected to the coil drive block, which is arc-shaped to mate with the opening of the clearance groove. When energized, the other end of the coil module reciprocates within the clearance groove. The support platform is slidably connected to the arc-shaped guide rail. When the coil module moves, it drives the support platform to slide on the arc-shaped guide rail.

[0006] In a preferred embodiment, the stator assembly is divided into multiple stator units, which are sequentially spliced ​​together. The coil module includes multiple coil components, each including a skeleton strip and a coil. The coil fixing block has an arc groove on one side near the opening of the clearance groove. The skeleton strip is connected and fixed in the arc groove. The coil is wound around both sides of the skeleton strip. The skeleton strip has magnetic holes. The bottom of the clearance groove has an arc-shaped slot with a U-shaped cross-section. The other end of the coil module moves within the arc-shaped slot.

[0007] In a preferred embodiment, a support block is provided on one side of the support platform facing the arc-shaped mounting base, the top surface of the support block is in contact with the bottom surface of the coil fixing block, and the inner side surface of the support block is in contact with the outer side surface of the coil fixing block.

[0008] In a preferred embodiment, the arc-shaped guide rail is provided with rails on both sides, and a set of pulleys is fixedly connected to both sides of the bottom surface of the support platform. Each set of pulleys is slidably connected to one of the rails. The bottom surface of the support platform is also provided with two guide blocks, which are opposite to each other and are engaged with both sides of the arc-shaped guide rail.

[0009] In a preferred embodiment, the arc motor further includes a detection component, which includes a grid ruler and a detection block. The grid ruler and the detection block are disposed on the side of the arc-shaped mounting base facing the arc-shaped guide rail. Two grid rulers are provided, which are attached to the arc-shaped mounting base in parallel, and the distance between the two grid rulers is greater than or equal to the thickness of the support platform.

[0010] In a preferred embodiment, the base and the arc-shaped mounting base are designed as an integrated unit.

[0011] The beneficial effects of this utility model are:

[0012] 1. In the circular arc motor disclosed in this utility model, the arc-shaped guide rail is set at the edge of the arc-shaped notch of the base and is independent of the space where the drive module is located. The support platform and the arc-shaped guide rail are slidably connected. Under this design, even if the stator and mover components (the part where the coil module is located) undergo thermal expansion, it will mainly affect their own structure and will not be directly transmitted to the arc-shaped guide rail. The arc-shaped guide rail is independent of the thermal expansion source, and its shape and position are basically unaffected. It can continuously provide a stable and accurate arc-shaped motion track for the support platform, thereby ensuring the stability and high precision of the support platform during the movement process, improving the overall performance and reliability of the equipment, and meeting the requirements of scenarios with high motion precision and stability.

[0013] 2. The circular arc motor disclosed in this utility model further utilizes a cooperative structure of a support block, a support platform, and a coil fixing block. Because the support block is positioned on the support platform, it supports and constrains the coil fixing block from both vertical and horizontal directions. The coil fixing block is effectively fixed in the vertical direction, preventing vertical jumping or shaking, thus enhancing the vertical stability of the support platform and the coil fixing block. In the horizontal direction, it acts as a limiter, preventing the coil fixing block from shifting or shaking in the horizontal direction. This ensures that the relative position between the coil module and the stator assembly remains stable, effectively preventing horizontal shaking of the support platform and the coil fixing block, thereby effectively improving the movement stability and anti-shaking properties of the support platform and the coil fixing block. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the arc motor structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the stator assembly structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the moving part component of this utility model. Detailed Implementation

[0018] 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.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to 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 "upper," "lower," "vertical," "horizontal," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0020] See Figures 1 to 3An arc motor for reducing the effects of thermal expansion includes a base 100, a drive module, and a support platform 400. One side of the base 100 has an arc-shaped notch 110. An arc-shaped guide rail 120 and an arc-shaped mounting base 130 are provided on the base 100. The arc-shaped guide rail 120 is located at the edge of the arc-shaped notch 110, and the arc-shaped mounting base 130 is located on the side of the arc-shaped guide rail 120 away from the arc-shaped notch 110. The drive module includes a stator assembly 200 and a mover assembly 300. The stator assembly 200 has a clearance groove 210, the opening of which faces the arc-shaped mounting base 130 towards the arc-shaped guide rail 110. One side edge of 20 is aligned, and the upper and lower inner walls of the clearance groove 210 are symmetrically provided with a first magnetic group 220 and a second magnetic group 230. The moving part assembly 300 includes a coil module 310 and a coil fixing block 320. One end of the coil module 310 is connected and fixed on the coil fixing block 320. The coil driving block is set as an arc shape that matches the groove opening of the clearance groove 210. When energized, the other end of the coil module 310 reciprocates within the clearance groove 210. The support platform 400 is slidably connected to the arc-shaped guide rail 120. When the coil module 310 moves, it drives the support platform 400 to slide on the arc-shaped guide rail 120.

[0021] It should be noted that when the coil module 310 in the drive module is energized, a magnetic field is generated around the coil due to the magnetic effect of the current. When the coil module 310 is energized, the magnetic field it generates interacts with the magnetic fields of the first magnetic group 220 and the second magnetic group 230. This interaction generates an electromagnetic force, which drives the coil module 310 to move in an arc reciprocating motion within the clearance groove 210. When the coil module 310 moves in an arc reciprocating motion within the clearance groove 210, it drives the coil drive block to move synchronously. As a result, the motion force of the coil drive block is transmitted to the support platform 400, thereby causing the support platform 400 to slide on the arc guide rail 120. In this design, the arc-shaped guide rail 120 is set at the edge of the arc-shaped notch 110 to guide the movement direction of the support platform 400. The arc-shaped notch 110 provides a reference for the installation and positioning of the arc-shaped guide rail 120. The arc-shaped mounting base 130 provides an installation position for the stator assembly 200, ensuring that the stator assembly 200 can be laid out according to the design requirements. The stator assembly 200 is provided with a clearance groove 210. When the coil module 310 moves in an arc-shaped reciprocating motion along the clearance groove 210, the clearance groove 210 provides movement space for the coil module 310. In practical applications, the groove opening and groove depth design of the clearance groove 210 can prevent the coil module 310 from coming out of the groove during the movement, ensuring the safety of the entire moving part 300 during the arc-shaped reciprocating motion. In this arc motor, the arc-shaped guide rail 120 is located at the edge of the arc-shaped notch 110 of the base 100, independent of the space where the drive module is located. The support platform 400 is slidably connected to the arc-shaped guide rail 120. With this design, even if the stator and mover assembly 300 undergo thermal expansion, it mainly affects their own structure and will not be directly transmitted to the arc-shaped guide rail 120. The arc-shaped guide rail 120, independent of the thermal expansion source, is essentially unaffected in shape and position, and can continuously provide a stable and precise arc-shaped motion track 121 for the support platform 400. This ensures the stability and high precision of the support platform 400 during movement, improves the overall performance and reliability of the equipment, and meets the requirements of scenarios with high motion precision and stability.

[0022] To achieve better scalability, the stator assembly 200 is divided into multiple stator units, which are then sequentially assembled. It should be noted that the stator assembly 200 uses multiple stator units assembled into an arc shape. This assembly method allows for flexible adjustment of the length and shape of the stator units according to actual needs, adapting to different application scenarios. Furthermore, the modular stator units facilitate manufacturing and control over manufacturing precision, and make it easier to repair and replace individual stator units.

[0023] The coil module 310 of the mover assembly 300 includes multiple coil components 311. Each coil component 311 includes a skeleton strip 311a and a coil 311b. The coil fixing block 320 has an arc groove 312a on one side near the opening of the clearance groove 210. The skeleton strip 311a is connected and fixed in the arc groove 312a. The coil 311b is wound around both sides of the skeleton strip 311a. The skeleton strip 311a has a magnetic hole 311c.

[0024] It should be noted that in the above structure, the arc groove 312a provides a fixed position for the coil module 310, provides support for the coil component 311, and ensures that the coil 311b has a precise position and angle after winding, thereby ensuring that the magnetic field generated by the coil 311b can accurately interact with the magnetic fields of the first magnetic group 220 and the second magnetic group 230 on the stator assembly 200, so as to achieve efficient electromagnetic drive.

[0025] The presence of the skeleton strip 311a and its magnetic guide hole 311c can guide and shape the magnetic field generated by the coil module 310, making the magnetic field distribution more uniform and concentrated. When the coil module 310 is energized, the magnetic field can interact more effectively with the magnetic group of the stator assembly 200, improving the generation efficiency of electromagnetic force, thereby enhancing the driving capability of the drive module to drive the carrier platform 400. Moreover, due to the optimization of the magnetic field distribution, the coil module 310 can generate sufficient electromagnetic force with a smaller current, improving the driving efficiency. At the same time, the stable magnetic field distribution also helps to reduce energy loss during the movement, making the movement of the carrier platform 400 more stable and efficient.

[0026] Understandably, the skeleton strip 311a is made of a material with certain thermal conductivity. When the coil 311b is energized and generates heat, the skeleton strip 311a can quickly conduct the heat away, playing an auxiliary role in heat dissipation, thereby reducing the impact of thermal expansion on the coil module 310 and the entire device.

[0027] To further restrict the freedom of movement of the coil module, the bottom of the clearance groove 210 is provided with an arc-shaped slot 211. The cross-section of the arc-shaped slot 211 is U-shaped, and the other end of the coil module 310 moves within the arc-shaped slot 211. It should be noted that during the movement of the coil module 310, due to the influence of the movement speed and the different loads on the support platform 400, the coil module 310 may deviate or sway during its movement within the clearance groove 210. The clearance groove 210 restricts the coil module 310 to slide within a certain arc-shaped trajectory, while the arc-shaped slot 211 further restricts the freedom of movement of the coil module 310 during its sliding process. In addition to moving along the arc-shaped direction set by the clearance groove 210, the movement of the coil module 310 in other directions (such as up and down, left and right swaying) is constrained by the arc-shaped slot 211, thereby reducing unnecessary vibration and swaying of the coil module 310 during its movement, improving the stability of the coil module 310's sliding, and ensuring that it moves accurately back and forth along the predetermined arc-shaped path.

[0028] See Figure 1 A support block 410 is provided on one side of the support platform 400 facing the arc-shaped mounting base 130. The top surface of the support block 410 is attached to the bottom surface of the coil fixing block 320, and the inner side of the support block 410 is attached to the outer side of the coil fixing block 320.

[0029] It should be noted that this design, through the cooperative structure of the support block 410 with the support platform 400 and the coil fixing block 320, effectively improves the movement stability and anti-swaying effect of the support platform 400 and the coil fixing block 320. Specifically, the top surface of the support block 410 is in contact with the bottom surface of the coil fixing block 320, providing support and constraint in the vertical direction. When the support platform 400 slides on the arc-shaped guide rail 120, the presence of the support block 410 effectively fixes the coil fixing block 320 in the vertical direction, preventing vertical jumping or shaking. This enhances the movement stability of the support platform 400 and the coil fixing block 320 in the vertical direction, reduces errors caused by vertical shaking, and improves the accuracy of movement. The inner surface of the support block 410 is in contact with the outer surface of the coil fixing block 320. The support block 410 acts as a limiter for the coil fixing block 320 in the horizontal direction. When the support platform 400 moves, the coil fixing block 320 will not shift or wobble in the horizontal direction due to the constraint of the support block 410. This ensures that the relative position between the coil module 310 and the stator assembly 200 remains stable, effectively preventing the support platform 400 and the coil fixing block 320 from wobbling in the horizontal direction. This guarantees the accuracy of the movement of the support platform 400, allowing it to move accurately along the predetermined arc path, meeting the requirements of high-precision operation. In other words, the tight fit between the support block 410, the support platform 400, and the coil fixing block 320 forms a more stable overall structure, which can better resist deformation and wobbling. This allows the support platform 400 and the coil drive block to maintain stable movement even in complex working environments, reducing the accumulation of movement errors and improving the reliability and stability of the equipment.

[0030] To further improve the moving stability of the support platform 400, the arc-shaped guide rail 120 is provided with rails 121 on both sides. A set of pulleys 420 is fixedly connected to both sides of the bottom surface of the support platform 400, and each set of pulleys 420 is slidably connected to a rail 121.

[0031] It should be noted that the double rails 121 provide precise motion guidance for the platform 400, and the cooperation between the double rails 121 and the double pulley block 420 effectively prevents the platform 400 from shifting left or right or swaying during movement. If there were only a single rail 121 and pulley block 420, the platform 400 might deviate from the rail 121 due to external forces or its own imbalance during movement. The double rail 121 design greatly reduces this risk and improves the accuracy of the platform 400's movement. On the other hand, the platform 400 is connected to the rails 121 of the arc-shaped guide rail 120 through two sets of pulley blocks 420, which evenly distributes the weight of the platform 400 and its load onto the two rails 121. This reduces the pressure on each rail 121 and pulley block 420, reduces wear on the rails 121 and pulley blocks 420, and extends their service life. Because the load is distributed, the platform 400 moves more smoothly, reducing swaying and instability caused by concentrated load.

[0032] Furthermore, the bottom surface of the support platform 400 is also equipped with two guide blocks 430, which are opposite each other and engaged with both sides of the arc-shaped guide rail 120. It should be noted that the two guide blocks 430, which are opposite each other and engaged with both sides of the arc-shaped guide rail 120, provide a precise positioning reference for the support platform 400. During the movement of the support platform 400, the guide blocks 430 always maintain close contact with the arc-shaped guide rail 120, correcting the positional deviation of the support platform 400 in real time, avoiding the accumulation of errors, ensuring that the support platform 400 always moves precisely according to the design requirements, preventing the support platform 400 from derailing from the rail 121, avoiding equipment damage and production accidents caused by derailment, and ensuring the safe and stable operation of production.

[0033] The engagement of the guide block 430 with the arc-shaped guide rail 120 can also share the pressure of the bearing platform 400 and its load on the pulley block 420 and the rail 121. When the bearing platform 400 moves, in addition to the pulley block 420 bearing the vertical load, the guide block 430 can also bear a part of the horizontal force and torque, which reduces the burden on the pulley block 420 and the rail 121, extends their service life, and improves the structural strength and reliability of the entire device.

[0034] In this embodiment, the arc motor further includes a detection component 500, which includes a scale 510 and a detection block 520. The scale 510 and the detection block 520 are disposed on the side of the arc-shaped mounting base 130 facing the arc-shaped guide rail 120. It is understood that the detection block 520, in cooperation with the scale 510, can accurately measure the position of the support platform 400 on the arc-shaped guide rail 120. When the support platform 400 moves, the detection block 520 reads the scale information on the scale 510, thereby providing real-time feedback on the accurate position of the support platform 400. By mounting both the scale 510 and the detection block 520 on the arc-shaped mounting base 130, there is no direct mechanical contact between the detection block 520 and the scale 510 during frequent movement of the support platform 400. This avoids relative friction between the two, which could cause wear and scratches on the scale 510 surface, thus affecting measurement accuracy.

[0035] Specifically, two scales 510 are provided, which are attached parallel to each other on the arc-shaped mounting base 130. The distance between the two scales 510 is greater than or equal to the thickness of the support platform 400. It should be noted that by using two scales 510 to independently record displacement data, the detection block 520 can verify data consistency in real time through dual-channel signal comparison, eliminating errors caused by local wear, contamination, or electromagnetic interference from a single scale 510. Even if one scale 510 fails due to wear or signal interference, the other scale 510 can still maintain system operation, avoiding downtime. When the distance between the two scales 510 is at least equal to the thickness of the support platform 400, the support platform 400 can smoothly pass through the area between the two scales 510 during movement without colliding with or obstructing them. Moreover, this design is compatible with support platforms 400 of different thicknesses. As long as the thickness of the support platform 400 does not exceed the distance between the scales 510, it can be used directly without adjusting the installation positions of the scales 510 and the detection block 520, improving the versatility and flexibility of the equipment.

[0036] In the split structure, the base 100 and the arc-shaped mounting base 130 are assembled using bolts and other connecting parts, resulting in assembly gaps and positioning errors. In another embodiment, the base 100 and the arc-shaped mounting base 130 can be designed as a single unit. The integrated design eliminates these assembly steps, and during the movement of the support platform 400, the integrated structure can better distribute stress and reduce local deformation.

[0037] 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 circular arc motor with reduced thermal expansion effects, characterized in that, include: The base has an arc-shaped notch on one side, and an arc-shaped guide rail and an arc-shaped mounting seat are provided on the base. The arc-shaped guide rail is located at the edge of the arc-shaped notch, and the arc-shaped mounting seat is located on the side of the arc-shaped guide rail away from the arc-shaped notch. A drive module includes a stator assembly and a mover assembly. The stator assembly has a clearance groove, the opening of which is aligned with the edge of the arc-shaped mounting base facing the arc-shaped guide rail. A first magnetic group and a second magnetic group are symmetrically arranged on the upper and lower inner walls of the clearance groove. The mover assembly includes a coil module and a coil fixing block. One end of the coil module is connected to the coil driving block, which is arc-shaped to mate with the opening of the clearance groove. When energized, the other end of the coil module reciprocates within the clearance groove. The support platform is slidably connected to the arc-shaped guide rail. When the coil module moves, it causes the support platform to slide on the arc-shaped guide rail.

2. The circular arc motor for reducing the effects of thermal expansion according to claim 1, characterized in that, The stator assembly is divided into multiple stator units, which are then sequentially assembled.

3. The circular arc motor for reducing the effects of thermal expansion according to claim 2, characterized in that, The coil module includes multiple coil components, each including a skeleton strip and a coil. The coil fixing block has an arc groove on one side near the opening of the clearance groove. The skeleton strip is connected and fixed in the arc groove. The coil is wound around both sides of the skeleton strip. The skeleton strip has magnetic holes.

4. The circular arc motor for reducing the effects of thermal expansion according to claim 3, characterized in that, The bottom of the clearance groove is provided with an arc-shaped slot, the cross-section of which is U-shaped, and the other end of the coil module moves within the arc-shaped slot.

5. The circular arc motor for reducing the effects of thermal expansion according to claim 1, characterized in that, A support block is provided on one side of the support platform facing the arc-shaped mounting base. The top surface of the support block is in contact with the bottom surface of the coil fixing block, and the inner side of the support block is in contact with the outer side of the coil fixing block.

6. The circular arc motor for reducing the effects of thermal expansion according to claim 1, characterized in that, The arc-shaped guide rail is provided with rails on both sides, and a set of pulleys is fixedly connected to each side of the bottom surface of the support platform. Each set of pulleys is slidably connected to one of the rails.

7. A circular arc motor for reducing the effects of thermal expansion according to claim 6, characterized in that, The bottom surface of the support platform is also provided with two guide blocks, which are opposite to each other and are engaged with both sides of the arc-shaped guide rail.

8. A circular arc motor for reducing the effects of thermal expansion according to claim 1, characterized in that, It also includes a detection component, which includes a grid ruler and a detection block, the grid ruler and the detection block being disposed on the side of the arc-shaped mounting base facing the arc-shaped guide rail.

9. A circular arc motor for reducing the effects of thermal expansion according to claim 8, characterized in that, Two grid rulers are provided, and the two grid rulers are attached to the arc-shaped mounting base in parallel. The distance between the two grid rulers is greater than or equal to the thickness of the support platform.

10. A circular arc motor for reducing the effects of thermal expansion according to claim 1, characterized in that, The base and the arc-shaped mounting base are designed as an integrated unit.

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