A protective ring and a rotary table structure with the same

Abstract

The application relates to a protective ring in the technical field of rotary table protection, which comprises an outer ring part and an inner ring part, the outer ring part and the inner ring part are integrally formed, the middle part of the inner ring part is provided with a space for inserting a shaft-like structure, and the outer ring part and the inner ring part have a thickness difference. In order to reduce the influence of waste chips on the use of a rotary table structure and improve the use precision and service life of the rotary table, the application provides a protective ring and a rotary table application structure with the protective ring.

Description

Technical Field

[0001] This application relates to the field of turntable protection, and more particularly to a protective ring and a turntable application structure having the protective ring. Background Technology

[0002] A mechanical worktable that can rotate around both a vertical and a horizontal axis is called a rotary table.

[0003] The initial development of functional components for CNC machine tools in my country followed two parallel paths.

[0004] First, specialized accessory manufacturers are developing CNC accessory products such as CNC rotary tables, power chucks, and ball screws. Second, main machine manufacturers are developing their own supporting functional components, such as CNC tool holders, and some even have tool magazines and spindles.

[0005] With increasingly detailed division of labor, the expansion of specialized collaborative production, and the limitations of OEM production and development capabilities, most machine tool manufacturers no longer follow the traditional practice of developing and producing their own functional components. Instead, they have chosen the path of supporting specialized factories, and the role of OEMs in making accessories is becoming increasingly weak.

[0006] CNC rotary tables have formed a complete social support system. This is an inevitable result of the development of the market economy and an essential path to improve product quality, shorten delivery time, reduce costs, and achieve large-scale production. Specialized production and socialized cooperation should be the direction of the development of CNC accessories in my country.

[0007] Currently, CNC rotary table structures face various harsh production environments, especially in metal processing environments such as machining, cutting, and CNC machining. The encapsulation between the exposed motor shaft and the rotary table's outer shell structure makes it highly susceptible to trapping large, hard metal chips. These chips not only enter the rotary table, interfering with the normal operation of precision components, but also generate additional friction during rotation, leading to decreased positioning accuracy. Long-term accumulation of chips accelerates the wear of core components such as bearings, severely shortening the rotary table's lifespan and significantly increasing equipment maintenance costs and downtime. Existing technologies often employ simple sealing rings and bellows covers for rotary table protection, but these structures are difficult to adapt to motors with different shaft diameters and cannot provide continuous and effective chip isolation in harsh processing environments. Especially under complex conditions such as high vibration and coolant scouring, the sealing performance rapidly declines, failing to fundamentally solve the problem of chip intrusion. Summary of the Invention

[0008] To reduce the impact of waste debris on the turntable structure and improve its accuracy and service life, this application provides a protective ring, employing the following technical solution: A protective ring includes an outer ring portion and an inner ring portion, the outer ring portion and the inner ring portion being integrally formed, the middle portion of the inner ring portion having a space for a shaft-like structure to be inserted, and the outer ring portion and the inner ring portion having a thickness difference.

[0009] By adopting the above technical solution, the ring body is divided into two parts: an inner ring and an outer ring. Although they are integrally molded and made of the same material, their functions are different, so their roles cannot be generalized. The outer ring, as the load-bearing and mounting part of the ring body, is firmly assembled to the turntable structure using a threaded fixing method. The inner ring, as the "sealing" part, cooperates with the turntable's motor shaft, allowing waste debris to be discharged into the turntable as much as possible. This reduces the possibility of larger waste debris entering the turntable's interior, effectively protecting the turntable's internal structure, extending the turntable's service life, and ensuring control over the turntable's operating precision. The inner and outer rings have different thicknesses, allowing the inner ring's structure to be adjusted to meet external needs. Adjustments such as bending and arcing can be made in thinner areas, effectively adapting to different product application environments and usage requirements.

[0010] Preferably, the outer ring portion has a uniform thickness, while the inner ring portion has a non-uniform thickness.

[0011] By adopting the above technical solution, when the outer ring has a uniform thickness, it can be well assembled on the turntable structure as the load-bearing and installation part of the ring as a whole. However, when the thickness is not uniform, the stability of the assembly part and the stability of the structure itself are uncertain. When the inner ring has a non-uniform thickness, it is convenient to perform bending, arcing and other adjustment operations at the nodes where the thickness changes, so as to truly adapt to different product application environments and product usage needs.

[0012] Preferably, one side of the connection between the inner ring and the outer ring has at least one pre-indentation.

[0013] Preferably, the other side of the connection between the inner ring portion and the outer ring portion has at least one raised ring.

[0014] By adopting the above technical solution, on the one hand, the main function of the pre-indentation is to facilitate bending of the parts of the protective ring that may need to be bent, while the main function of the raised ring is to serve as a reinforcing structure on the protective ring. On the other hand, there are several ways to set the pre-indentation and raised ring. One way is to set the pre-indentation and raised ring correspondingly, so that the recessed and raised parts can be on the same front and back sides. In particular, it can make the overall thickness of the segmented part of the protective ring connect the thickness changes of the inner and outer rings. Thus, this part can be easily bent, and the inner ring will not break easily during the subsequent process in certain scenarios, thus avoiding adverse consequences. This is suitable for most application scenarios.

[0015] Another approach is to stagger the pre-indentation and the raised ring. This allows the recessed and raised parts to be on opposite sides of different locations. This staggered arrangement is more suitable for various product applications. In the horizontal direction from the outer ring to the inner ring, the pre-indentation is in front and the raised ring is behind. This is especially suitable for applications with thinner motor shafts. Because the protective ring for thinner motor shafts is relatively thin, the deformation force exerted on the protective ring during installation is not significant. This allows the protective ring to be as close as possible to the outer edge of the motor shaft, enabling waste to be expelled from the turntable by the inner ring. This reduces the possibility of larger waste entering the turntable's interior, effectively protecting the internal structure and extending the turntable's service life.

[0016] Another configuration exists where, in the horizontal direction from the outer ring to the inner ring, the pre-indentation is behind and the convex ring is in front. This configuration is particularly suitable for applications with thicker motor shafts. The protective ring for a thicker motor shaft is relatively thicker, and during installation, the deformation force exerted on the protective ring by the thicker motor shaft creates structural tension. This causes the convex ring to swing towards the motor shaft, allowing it to approach the shaft. Simultaneously, the inner ring structure moves as close as possible to the outer edge of the motor shaft. Combined with the swinging structure of the convex ring, this double protection allows waste to be expelled from the turntable by the inner ring, reducing the likelihood of larger waste entering the turntable's interior. This effectively protects the internal structure of the turntable and extends its service life.

[0017] Preferably, the side surface of the inner ring has uniformly frosted protrusions.

[0018] By adopting the above technical solution, the surface of the inner ring is made less smooth, which effectively increases the surface friction of the inner ring. When encountering waste debris, it is less likely to slide into the interior of the turntable structure, minimizing the possibility of waste debris sliding in, thus effectively protecting the internal structure of the turntable and extending its service life.

[0019] Preferably, the outer ring portion has a mounting portion that penetrates through layers on its side.

[0020] By adopting the above technical solution, the installation department can easily install the protective ring, adapt to the subsequent installation process, and improve the stability of the product's molding structure.

[0021] In addition, in a second aspect, this application provides a turntable structure, which adopts the following technical solution: A turntable structure includes a turntable body with a motor structure, wherein a protective ring is mounted on the turntable body and sleeved on the motor shaft, and the motor shaft extends from the middle of the inner ring.

[0022] By adopting the above technical solution, through the protective ring structure and the motor shaft structure, the turntable structure can effectively reduce the damage caused by the waste to the turntable structure itself in scenarios with a large amount of production waste, thereby effectively improving the service life of the turntable structure.

[0023] Preferably, the outer ring of the protective ring is locked to the turntable body by intermittent forward and reverse bolts.

[0024] By adopting the above technical solution and using bidirectional bolt locking, the connection between the protective ring and the turntable can be made more stable. Furthermore, in the subsequent assembly of the protective ring and the motor shaft, it can effectively adapt to the special conditions required during the assembly process.

[0025] Preferably, a gap is left between the protective ring and the motor shaft.

[0026] By adopting the above technical solution, the clearance is a necessary space for the motor shaft to rotate. The finer the clearance, the less it affects the rotation of the motor shaft, and the more effectively it reduces the damage of debris to the turntable structure itself, thereby effectively improving the service life of the turntable structure. Preferably, the thickness of each part of the protective ring is between 1mm and 5mm.

[0027] By adopting the above technical solution, the thickness of different parts varies, which can adapt to the assembly needs of motor shafts of different thicknesses in different scenarios. On the other hand, it can also be adjusted to meet external needs, and adjustment operations such as bending and arcing can be achieved in the thinner parts, effectively adapting to different product application environments and product usage requirements.

[0028] In summary, this application includes at least one of the following beneficial technical effects.

[0029] 1. The protective ring itself has the ability to be bent and curved, and its structure can be changed according to the needs and actual conditions to adapt to the needs of different turntables.

[0030] 2. The fit between the protective ring and the motor shaft can prevent waste from entering the internal structure of the turntable and causing damage to the turntable structure.

[0031] 3. The special structure of the protective ring enables the formation of gaps around the motor shaft to match the structure of the motor shaft or the required structure of the turntable during subsequent assembly, thereby reducing the entry of waste into the turntable.

[0032] 4. It has a certain limiting capability, which can effectively monitor whether the motor shaft deviates from the center during subsequent use of the turntable. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0034] Figure 2 These are the side cross-sectional view of the embodiment of this application without change and the view after change (the arrow direction is the direction in which the motor shaft passes through).

[0035] Figure 3 This is a schematic diagram of the multi-pre-indentation and multi-convex ring structure in the embodiments of this application.

[0036] Figure 4 This is a simplified schematic diagram of the turntable structure and protective ring in the embodiments of this application.

[0037] Explanation of reference numerals in the attached figures: 1. Outer ring section.

[0038] 2. Inner ring.

[0039] 3. Installation Department.

[0040] 31. Countersunk hole; 32. Threaded connection hole.

[0041] 4. Pre-indentation.

[0042] 5. Protruding ring.

[0043] 6. Uniformly frosted raised surface. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0045] This application discloses a protective ring.

[0046] Reference Figure 1 A protective ring includes an outer ring portion 1 and an inner ring portion 2, which are manufactured by integral molding. The inner ring portion 2 has a space in the middle for a shaft-like structure to be inserted. The outer ring portion 1 and the inner ring portion 2 have a thickness difference. Specifically, the outer ring portion 1 has a uniform thickness. In this embodiment, the outer ring portion 1 has a straight plate structure, but in other embodiments, it can also be an arc plate structure. The arc plate structure can be a single arc plate structure or a multi-arc arc plate structure. Its specific form is defined and designed according to the actual production situation and the turntable structure that needs to be adapted.

[0047] Reference Figure 1 The thickness of the inner ring 2 is uneven. In this embodiment, the thickness of the inner ring 2 gradually decreases from the side closer to the outer ring 1 to the side farther away from the outer ring 1, so that the cross-section of the inner ring 2 is a triangular or trapezoidal surface. If it is a triangular surface, the cross-section can be divided into obtuse triangle, acute triangle, and right triangle depending on the actual situation. If it is a trapezoidal surface, the cross-section can be divided into right trapezoid and ordinary trapezoid depending on the actual situation. In fact, the structural form of the inner ring 2 on the protective ring is mainly determined by the motor shaft that is compatible with the protective ring. The current shaft diameter range of the motor shaft is generally 10mm-80mm.

[0048] Therefore, in order to facilitate the explanation of the specific application scenarios of the structure of this application, the following definitions are made in this application: The shaft diameter is defined as less than 20mm as the finer shaft diameter range, which corresponds to the case of finer shaft diameter.

[0049] The range of 20mm-40mm is defined as the commonly used shaft diameter range, which corresponds to the general shaft diameter situation.

[0050] Shaft diameters in the range of 40mm-60mm are defined as the coarser shaft diameter range, corresponding to the case of coarser shaft diameters.

[0051] The shaft diameter greater than 60mm is defined as the extremely coarse shaft diameter range, which corresponds to the case of extremely coarse shaft diameter.

[0052] If the application is used when the diameter of the motor shaft is relatively small, the inner ring 2 can adopt a structural form with an obtuse triangle, a right triangle, a right trapezoid, or a regular trapezoid (one of the lower base angles is an obtuse angle).

[0053] If applied to motor shafts with a general diameter, the inner ring 2 can adopt a structural form with an acute-angled triangle, a right-angled triangle, a right-angled trapezoid, or a regular trapezoid (both bottom angles are acute angles).

[0054] If the application is used in cases where the motor shaft diameter is relatively large or extremely large, the inner ring 2 can adopt a structural form with an acute-angled triangle or a common trapezoid (both bottom angles are acute angles).

[0055] Reference Figure 1 In this embodiment, one side of the connection between the inner ring 2 and the outer ring 1 has a pre-indentation 4, and the other side of the connection between the inner ring 2 and the outer ring 1 has a protruding ring 5. That is, when one side of the protective ring is set with a pre-indentation 4, the other side is set with a protruding ring 5, and vice versa. The number of turns of both the pre-indentation 4 and the protruding ring 5 is determined by the shaft diameter of the motor shaft that is compatible with the protective ring.

[0056] Reference Figure 1 , Figure 3 If applied to a motor shaft with a small diameter, the connection between the inner ring 2 and the outer ring 1 shall have at least one pre-indentation 4 and a raised ring 5. In general, the number of pre-indentation 4 and the number of raised ring 5 shall be the same. Of course, in some special production scenarios, the number of raised ring 5 may need to be greater than the number of pre-indentation 4. For example, in scenarios where there is a large amount of waste and a small volume of waste, the number of raised ring 5 should preferably be greater than the number of pre-indentation 4.

[0057] When applied to motor shafts with a normal diameter, the connection between the inner ring 2 and the outer ring 1 shall have at least one pre-indentation 4 and a raised ring 5. In general, the number of pre-indentation 4 and the number of raised ring 5 shall be the same. Similarly, in some special production scenarios, the number of raised ring 5 may need to be greater than the number of pre-indentation 4. For example, in scenarios where there is a large amount of waste material but a small volume of waste material, the number of raised ring 5 should preferably be greater than the number of pre-indentation 4.

[0058] When applied to motor shafts with large or extremely large diameters, the connection between the inner ring 2 and the outer ring 1 has two or more pre-indentations 4 and a raised ring 5. In general, the number of pre-indentations 4 and the number of raised rings 5 ​​are the same. Conversely, in some special production scenarios, the number of pre-indentations 4 may need to be greater than the number of raised rings 5. For example, in scenarios where there is a large amount of waste material but a small volume of waste material, the number of raised rings 5 ​​should preferably be greater than the number of pre-indentations 4.

[0059] Furthermore, the pre-indentation 4 and the raised ring 5 still have different positions, and the specific settings are adjusted according to the actual production scenario.

[0060] In this design, the pre-indentation 4 and the raised ring 5 can be set back to back on opposite ends of the protective ring. That is, the front and back sides opposite the location where the pre-indentation 4 is set must be set with the raised ring 5. This arrangement ensures that the recessed and raised parts on the protective ring are on the same front and back. In particular, it ensures that the overall thickness of the segmented part of the protective ring can connect the thickness changes on both sides of the inner ring 2 and the outer ring 1. Thus, this part can be easily bent, and it can also ensure that the inner ring 2 will not break so easily during the subsequent process in certain scenarios, thus avoiding adverse consequences. This design is suitable for most application scenarios.

[0061] However, in other scenarios, the pre-indentation 4 and the raised ring 5 can be set at opposite ends of the protective ring, that is, the front and back sides opposite the position where the pre-indentation 4 is set will definitely not be set with the raised ring 5. This allows the recessed part and the raised part to be on opposite sides of different positions. The scenario of setting them at different times is more suitable for the special application scenarios of various products.

[0062] Specifically, in the horizontal direction from the outer ring 1 to the inner ring 2, the first pre-indentation 4 is in front and the first convex ring 5 is behind. Then, the arrangement is in the form of pre-indentation 4-convex ring 5-pre-indentation 4. The number of turns is set according to the actual scenario. It is especially suitable for the application scenario where the motor shaft is thin. Because the protective ring for the corresponding application of the thinner motor shaft is relatively thin, and during the subsequent installation of the protective ring, the deformation force on the protective ring is not large due to the thinner motor shaft. This allows the protective ring to be as close as possible to the outer periphery of the motor shaft, so that the waste can be discharged into the turntable by the inner ring 2 as much as possible. This reduces the possibility of large-volume waste entering the interior of the turntable, effectively protects the internal structure of the turntable, and extends the service life of the turntable.

[0063] In this type of arrangement, there is another configuration. From the outer ring 1 to the inner ring 2, the first pre-indentation 4 is behind the first convex ring 5, and then arranged in a convex ring 5-pre-indentation 4-convex ring 5 pattern. The number of turns is cyclically set according to the actual scenario. This is particularly suitable for applications with thicker motor shafts, as the protective rings for thicker shafts are relatively thicker. During the installation of the protective rings, the deformation force exerted on the protective rings by the thicker motor shaft during installation is sufficient to create structural tension. This causes the convex ring 5 to swing towards the motor shaft, allowing it to approach the shaft. Simultaneously, the inner ring 2 can also be positioned as close as possible to the outer edge of the motor shaft. Combined with the swinging structure of the convex ring 5, this double protection allows waste to be expelled from the turntable by the inner ring 2, reducing the possibility of larger waste entering the turntable's interior. This effectively protects the internal structure of the turntable and extends its service life.

[0064] Reference Figure 1 , Figure 2 In addition, in this embodiment, the inner ring 2 has uniform frosted protrusions 6 on its side. The frosted protrusions make the surface of the inner ring 2 less smooth, effectively increasing the surface friction of the inner ring 2. When encountering waste, it is less likely to slide into the turntable structure, minimizing the possibility of waste sliding in, thus effectively protecting the internal structure of the turntable and extending the service life of the turntable. At the same time, the frosted protrusions on the side of the protective ring with the protruding ring 5 are thicker than the frosted protrusions on the side of the protective ring with the pre-indentation 4.

[0065] Furthermore, in this embodiment, the outer ring portion 1 is provided with a mounting portion 3 through layers on its side. The mounting portion 3 includes at least a threaded connection hole 32 and a countersunk hole 31. The diameter of the countersunk hole 31 is larger than the diameter of the threaded connection hole 32. The mounting portions 3 are staggered with each other. If viewed from top to bottom and described from left to right, the first mounting portion 3 is arranged with a threaded connection hole 32 and a countersunk hole 31. The second mounting portion 3 is arranged with a countersunk hole 31 and a threaded connection hole 32. The third mounting portion 3 is arranged with a threaded connection hole 32 and a countersunk hole 31, and so on.

[0066] Reference Figure 1 , Figure 2 The mounting part 3 facilitates the installation of the protective ring, adapts to the subsequent installation process, and improves the stability of the product's molding structure. The outer wall of the mounting part 3 is wrapped with a rubber ring, and the cross-section of the outer wall of the mounting part 3 is funnel-shaped.

[0067] Reference Figure 4 This application also discloses a turntable structure, which at least has the protective ring described in the embodiments of this application.

[0068] Secondly, the turntable structure includes a turntable body with a motor structure, a protective ring is installed on the turntable body and sleeved on the motor shaft, and the motor shaft extends out from the space in the middle of the inner ring 2 with an interference fit.

[0069] Meanwhile, after the mounting part 3 on the outer ring 1 of the protective ring is inserted into the mounting hole on the turntable body, the mounting part 3 allows the protective ring and the turntable body to be locked with alternating forward and reverse bolts due to its arrangement. The bidirectional bolt locking provides strong connection stability between the protective ring and the turntable. Furthermore, it effectively adapts to the special conditions required during the subsequent assembly of the protective ring and the motor shaft. Since the protective ring and the motor shaft are interference-fitted, after the protective ring is threaded and locked, the turntable is started, causing the motor shaft to rotate. The rotational speed of the motor shaft increases periodically. As the rotational speed gradually increases, the motor shaft can rub against the part of the protective ring that is in contact with it for a long time, creating a very fine gap that is sufficient not to affect the rotation of the turntable motor shaft.

[0070] In this embodiment, the thickness of each part of the protective ring is between 1mm and 5mm. Specifically, for the finer shaft diameter range, a protective ring with a thickness of 1mm-2mm is used; for the commonly used shaft diameter range, a protective ring with a thickness of 2mm-4mm is used; and for the coarser and extremely coarser shaft diameter range, a protective ring with a thickness of 4mm-5mm is used.

[0071] The present application discloses a protective ring and the implementation principle of a turntable structure incorporating the protective ring: Before installing the protective ring, the protective ring is first soaked and heated in a heating box to soften it. After the soaking liquid in the heating box is raised to 40°C, the temperature of the soaking liquid is increased by 2°C every 30 seconds. The temperature of the soaking liquid is gradually raised to 80°C and then kept constant. In addition, a solute is added to the soaking liquid to improve the slippage of the protective ring. In this embodiment, the solute is soapy water.

[0072] During installation, the protective ring is press-fitted to the motor shaft. Some related structures on the protective ring are bent and eventually abut against the outer periphery of the turntable motor shaft. Then, the protective ring and the turntable are threaded together for locking.

[0073] After the protective ring is locked, the turntable is started, and the motor shaft rotates at a speed of one revolution per second for 10-20 minutes until the liquid on the protective ring is completely dry. During this period, a hot drying device is simultaneously installed in the surrounding environment. After the soaking liquid on the protective ring is completely dry, the turntable speed is increased again, and the motor shaft rotates at a speed of five revolutions per second for 10 minutes. During this period, a cold drying device is simultaneously installed in the surrounding environment. In this embodiment, both the cold drying device and the hot drying device adopt a fan structure that can be adjusted for hot and cold temperatures, so that an extremely fine gap is created between the protective ring and the motor shaft, and the polished oil-plastic mixture can be quickly solidified and adhered between the two, thus completing the assembly of the protective ring and the turntable structure.

[0074] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A protective ring, characterized in that, It includes an outer ring (1) and an inner ring (2), the outer ring (1) and the inner ring (2) are integrally formed, the middle part of the inner ring (2) has a space for the insertion of a shaft-like structure, the outer ring (1) and the inner ring (2) have a thickness difference; wherein, the outer ring (1) has a uniform thickness, the inner ring (2) has a non-uniform thickness, the thickness of the inner ring (2) gradually decreases from the side close to the outer ring (1) to the side away from the outer ring (1), so that the cross section of the inner ring (2) is a triangular surface or a trapezoidal surface, and the structural form of the corresponding inner ring (2) on the protective ring is determined according to the motor shaft that is compatible with the protective ring; For shaft diameters less than 20mm, the inner ring (2) adopts a common trapezoidal structure with a cross-section of an obtuse triangle, a right triangle, or a right trapezoid, and one of its lower base angles being an obtuse angle. The shaft diameter is in the range of 20mm-40mm. The inner ring (2) adopts a common trapezoidal structure with an acute triangle, right triangle or right trapezoidal cross section and both bottom angles being acute. The shaft diameter is in the range of 40mm-60mm, and the inner ring (2) adopts a structure of an acute triangle or a common trapezoid with both bottom angles being acute. For shafts with a diameter greater than 60mm, the inner ring (2) adopts a structure with an acute-angled triangle cross section or a common trapezoid with both bottom angles being acute. Furthermore, one side of the connection between the inner ring (2) and the outer ring (1) has at least one pre-indentation (4), and the other side of the connection between the inner ring (2) and the outer ring (1) has at least one convex ring (5), and the number of convex rings (5) is greater than the number of pre-indentation (4). Among them, the pre-indentation and the fit relationship of the inner ring are set according to the range of motor shaft diameter; When the shaft diameter is less than 20mm, the first pre-pressing mark (4) is in front and the first convex ring (5) is behind in the horizontal direction from the outer ring (1) to the inner ring (2), and then the arrangement is in the form of pre-pressing mark (4)-convex ring (5)-pre-pressing mark (4). The actual number of circles is set according to the actual scenario. When the shaft diameter is between 40mm and 60mm, from the outer ring (1) to the inner ring (2) in the horizontal direction, the first pre-pressing mark (4) is behind and the first convex ring (5) is in front, and then the convex ring (5)-pre-pressing mark (4)-convex ring (5) are arranged in a manner, and the actual number of turns is set according to the actual scenario. Furthermore, the inner ring portion (2) has uniformly frosted protrusions (6) on its side surface.

2. The protective ring according to claim 1, characterized in that: The outer ring portion (1) has a mounting portion (3) that penetrates through the side layer.

3. A turntable structure having a protective ring as described in any one of claims 1-2, characterized in that: The device includes a turntable body with a motor structure, wherein the protective ring is mounted on the turntable body and sleeved on the motor shaft, and the motor shaft extends from the middle of the inner ring (2).

4. A turntable structure according to claim 3, characterized in that: The outer ring (1) of the protective ring is locked to the turntable body by intermittent forward and reverse bolts.

5. A turntable structure according to claim 3, characterized in that: A gap is left between the protective ring and the motor shaft.

6. A turntable structure according to claim 3, characterized in that: The thickness of each part of the protective ring is between 1mm and 5mm.

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