A nail grinder transmission assembly and a nail grinder

Abstract

The utility model relates to manicure polishing technical field, especially a kind of nail grinder transmission assembly and nail grinder.It is connected in turn that nail grinder transmission assembly includes driving part, coupling assembly and main shaft;Main shaft includes base body part and protruding part, protruding part is connected with coupling assembly, main shaft and coupling assembly synchronous rotation, nail grinder transmission assembly further includes first elastic member and first sleeve, first elastic member and first sleeve are sequentially set on base body part outside. First elastic member converts the energy of radial vibration into its elastic potential energy, reduces the transmission of vibration, and can also realize buffering and shock absorption in the axial direction. First sleeve is set outside first elastic member as rigid support structure, which limits and protects first elastic member, and further disperses vibration energy through the contact between first sleeve and the surrounding structure. The radial vibration of main shaft is effectively inhibited when rotating at high speed, which helps to improve the uniformity of nail polishing and user comfort.

Description

Technical Field

[0001] This utility model relates to the field of nail polishing technology, and in particular to a nail polisher transmission component and a nail polisher. Background Technology

[0002] A nail file is a tool used to file and polish nails, widely used in personal care and the nail industry. Its core function is to use the nail file's transmission component to drive the filing head to rub and shape the nails, achieving a neat and beautiful appearance.

[0003] When a nail grinder is in operation, the radial vibration generated by the high-speed rotation of the main shaft of the grinder's transmission assembly can easily be transmitted to the protective shell and the handle. If this radial vibration is not adequately addressed, it can cause the grinding head to shift and result in significant vibration when held, thus reducing the uniformity of the grinding process and user comfort. Therefore, solving the radial vibration problem of the nail grinder's transmission assembly is a pressing technical issue that needs to be addressed. Utility Model Content To solve the above problems, this utility model provides a nail grinding machine transmission assembly and a nail grinding machine.

[0004] The present invention provides a transmission assembly for a nail grinder, comprising a drive component, a coupling assembly, and a main shaft connected in sequence. The main shaft comprises a base portion and a protrusion portion arranged in sequence along the direction towards the coupling assembly. The protrusion portion is connected to the coupling assembly. The main shaft rotates synchronously with the coupling assembly. The transmission assembly further comprises a first elastic element and a first sleeve, which are sequentially sleeved on the base portion radially outward from the main shaft.

[0005] Preferably, a first retaining edge is provided on the side of the base portion near the protrusion, and the first retaining edge extends radially outward along the main shaft; on the axial direction of the main shaft, a second retaining edge is provided on the side of the first sleeve away from the first retaining edge, and the second retaining edge extends radially inward along the main shaft, and the first elastic element is disposed between the first retaining edge and the second retaining edge.

[0006] Preferably, the distance between the first and second retaining walls is greater than the length of the first elastic element in the axial direction of the main shaft.

[0007] Preferably, the armor grinder transmission assembly further includes a second sleeve, which is sleeved on the base portion; bearings are respectively provided at both ends of the second sleeve, and the two ends of the second sleeve abut against the outer ring of the bearing, and the inner ring of the bearing is sleeved on the base portion.

[0008] Preferably, the bearing closest to the coupling assembly is defined as the first bearing, and a third sleeve is provided on the side of the first bearing away from the second sleeve, the third sleeve being sleeved on the first sleeve.

[0009] Preferably, the coupling assembly includes a first coupling and a second coupling, the first coupling and the second coupling being arranged sequentially along the direction close to the protrusion, and the first coupling, the second coupling and the protrusion rotating synchronously; the first coupling has at least one first circumferential limiting groove at one end close to the second coupling, and the side of the second coupling close to the first coupling is embedded in the first circumferential limiting groove; the second coupling has a second circumferential limiting groove at one end close to the protrusion, and the protrusion is at least partially embedded in the second circumferential limiting groove.

[0010] Preferably, the second coupling has a first annular groove on the side of the first circumferential limiting groove, and the coupling assembly further includes a second elastic element, which is sleeved on the first annular groove.

[0011] Preferably, in the radial direction of the main shaft, there is a gap between the second coupling and the protrusion. The coupling assembly further includes a third elastic element, which is disposed at the gap and sleeved on the protrusion. The two ends of the third elastic element are respectively connected to the main shaft and the second coupling.

[0012] Preferably, the end of the main shaft away from the coupling assembly has a grinding head mounting groove, a flexible covering is embedded in the grinding head mounting groove, the flexible covering has a mounting hole, and the opening of the mounting hole is located at the end of the flexible covering away from the coupling assembly.

[0013] To solve the above-mentioned technical problems, this utility model provides another technical solution as follows: a nail grinder, the nail grinder including a housing and the above-mentioned nail grinder transmission assembly, the nail grinder transmission assembly being disposed inside the housing.

[0014] Compared with the prior art, the nail grinding device transmission assembly and nail grinding device provided by this utility model have the following beneficial effects: 1. This utility model provides a transmission assembly for a grinding armor, which includes a drive component, a coupling assembly, and a main shaft connected in sequence. The main shaft includes a base portion and a protrusion portion arranged in sequence along the direction towards the coupling assembly. The protrusion portion is connected to the coupling assembly, and the main shaft rotates synchronously with the coupling assembly. The transmission assembly also includes a first elastic element and a first sleeve, which are sequentially sleeved on the base portion radially outward from the main shaft. By sequentially sleeved on the base portion radially outward from the main shaft, the elastic deformation capability of the first elastic element is used to buffer the radial vibration generated when the main shaft rotates at high speed. As a flexible element, the first elastic element can convert the energy of radial vibration into its own elastic potential energy, reducing the transmission of vibration; and the first elastic element can also achieve axial buffering and vibration reduction. At the same time, the first sleeve, as a rigid support structure, is sleeved on the outside of the first elastic element, which limits and protects the first elastic element, and further disperses the vibration energy through the contact between the first sleeve and the surrounding structure. This design effectively suppresses radial vibration of the spindle during high-speed rotation, which helps improve the uniformity of nail polishing and user comfort.

[0015] 2. In this embodiment of the invention, a first retaining wall is provided on the side of the base portion near the protrusion, extending radially outward along the main shaft. A second retaining wall is provided on the side of the first sleeve away from the first retaining wall, extending radially inward along the main shaft. A first elastic element is disposed between the first and second retaining walls. Because the first elastic element is sleeved between the first sleeve and the base portion, and is disposed between the first and second retaining walls, the first sleeve and the base portion restrict the compressive deformation range of the first elastic element in the radial and axial directions of the main shaft, thereby forming a complete constraint space. This ensures that the first elastic element can only undergo elastic deformation within this space during vibration. This limiting design prevents the first elastic element from axially shifting or deviating during high-speed rotation and vibration of the main shaft, ensuring the vibration reduction effect and reliability.

[0016] 3. In this embodiment of the invention, the distance between the first and second retaining edges is greater than the axial length of the first elastic element on the main shaft. By limiting the distance between the first and second retaining edges to be greater than the axial length of the first elastic element on the main shaft, it means that the first elastic element has a certain amount of axial movement allowance on the main shaft, providing sufficient deformation space for the first elastic element. When absorbing radial vibration of the main shaft, the first elastic element is compressed in the radial direction and expands in the axial direction, preventing it from getting stuck and causing buffer failure. This ensures that the first elastic element can compress and rebound according to the vibration and impact during the transmission process, fully utilizing its buffering and vibration reduction function.

[0017] 4. The armor grinder transmission assembly provided in this embodiment of the present invention further includes a second sleeve, which is fitted onto the base. Bearings are respectively provided at both ends of the second sleeve, with each end abutting against the outer ring of the bearing, and the inner ring of the bearing fitting onto the base. The bearings at both ends of the second sleeve provide rigid support for the main shaft, enhancing the rotational concentricity of the main shaft and significantly reducing radial runout during high-speed rotation. The inner ring of the bearing fitting onto the base and the outer ring abutting against the second sleeve form a double-positioning structure, effectively limiting the radial displacement of the main shaft. The bearings reduce frictional resistance and energy loss during high-speed rotation of the main shaft, further improving transmission efficiency. Furthermore, the aforementioned bearing-sleeve mating structure complements the flexible vibration damping of the first elastic element, both by rigidly supporting and constraining the positional relationship of the main shaft, and by absorbing the vibration of the main shaft through the first elastic element, forming a multi-layered suppression of radial vibration.

[0018] 5. In this embodiment of the present invention, the bearing closest to the coupling assembly is defined as the first bearing. A third sleeve is provided on the side of the first bearing away from the second sleeve, and the third sleeve is fitted onto the first sleeve. The third sleeve, fitted onto the first sleeve and located on the side of the first bearing away from the second sleeve, further enhances the axial positioning capability of the bearing. The cooperation between the third sleeve and the first sleeve forms an axial limit on the first bearing, preventing axial movement of the bearing during high-speed rotation and ensuring that the rotation axis of the main shaft remains stable. Furthermore, the third sleeve fitted onto the first sleeve also protects the first sleeve and the first elastic element, ensuring a durable and stable buffering effect against radial vibration.

[0019] 6. The coupling assembly provided in this embodiment of the present invention includes a first coupling and a second coupling, which are arranged sequentially along the direction close to the protrusion. The first coupling, the second coupling, and the protrusion rotate synchronously. At least one first circumferential limiting groove is provided at one end of the first coupling near the second coupling, and the side of the second coupling near the first coupling is embedded in the first circumferential limiting groove. A second circumferential limiting groove is provided at one end of the second coupling near the protrusion, and the protrusion is at least partially embedded in the second circumferential limiting groove. Since the coupling assembly includes a first coupling and a second coupling, and the second coupling is embedded in the first circumferential limiting groove on the side close to the first coupling, and the protrusion is at least partially embedded in the second circumferential limiting groove, a hierarchical nested fit is formed. This achieves precise circumferential fixation of the three components, avoids relative rotation during transmission, reduces radial vibration caused by transmission gaps, and improves transmission synchronization and reliability. In addition, the separate design of the first and second couplings facilitates the disassembly and replacement of individual couplings without having to replace the entire coupling assembly, thus reducing maintenance costs.

[0020] 7. In this embodiment of the invention, the second coupling extending into the first circumferential limiting groove has a first annular groove on its side. The coupling assembly also includes a second elastic element, which is sleeved on the first annular groove. The second elastic element is sleeved in the first annular groove of the second coupling, forming an elastic buffer area in the radial direction where the second coupling mates with the first coupling, thus avoiding transmission impact and abnormal noise caused by loose fit. The second elastic element can also compensate for the radial clearance between the first coupling and the second coupling caused by manufacturing or assembly errors, further suppressing vibration and noise, and making the transmission process smoother and more fluid.

[0021] 8. In this embodiment of the invention, a gap is left between the second coupling and the protrusion in the radial direction of the main shaft. The coupling assembly also includes a third elastic element, which is disposed at the gap and sleeved on the protrusion. The two ends of the third elastic element are respectively connected to the main shaft and the second coupling. Because of the gap between the second coupling and the protrusion, and the third elastic element being disposed at the gap and sleeved on the protrusion, with its two ends connected to the main shaft and the second coupling, an axial buffer area is formed. The third elastic element can effectively absorb the axial vibration generated by the rotation of the main shaft, preventing the vibration from being transmitted to other components through the main shaft and the second coupling, thus achieving vibration isolation. This further improves the smoothness and comfort of the grinding process and reduces operating noise. Furthermore, the deformation capability of the third elastic element enhances the adaptability of the main shaft and the second coupling, ensuring that the main shaft and the second coupling can maintain stable synchronous rotation under different working conditions.

[0022] 9. In this embodiment of the invention, the spindle has a grinding head mounting groove at the end furthest from the coupling assembly. A flexible covering is embedded in the grinding head mounting groove, and the flexible covering has a mounting hole. The opening of the mounting hole is located at the end of the flexible covering furthest from the coupling assembly. The flexible covering absorbs the high-frequency vibration transmitted by the grinding head through the damping properties of the elastic material. The flexible covering is embedded in the mounting groove, and its mounting hole and the grinding head form a flexible connection, which ensures the stable installation of the grinding head and reduces the transmission of vibration to the spindle through the elastic deformation of the flexible material.

[0023] 10. The nail grinder provided in this embodiment of the present invention includes a housing and the aforementioned nail grinder transmission assembly, the transmission assembly being disposed within the housing. The nail grinder achieves the same beneficial effects as the nail grinder transmission assembly, which will not be described in detail here. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of the armor grinder transmission assembly provided in the first embodiment of this utility model.

[0026] Figure 2 This is a cross-sectional structural diagram of the armor grinder transmission assembly provided in the first embodiment of this utility model.

[0027] Figure 3 yes Figure 2 Enlarged view of the structure of part A in the middle.

[0028] Figure 4 This is an exploded structural diagram of the armor grinding device transmission assembly provided in the first embodiment of this utility model.

[0029] Figure 5 yes Figure 2 Enlarged view of the structure of part B in the middle section.

[0030] Figure 6 This is a structural block diagram of the nail grinder provided in the second embodiment of this utility model.

[0031] Explanation of reference numerals in the attached diagram: 1. Armor grinder transmission assembly; 10. Main shaft; 11. Base body; 12. Protrusion; 13. Armor grinder head mounting groove; 14. Flexible covering; 20. Coupling assembly; 21. First coupling; 22. Second coupling; 23. Second elastic element; 24. Clearance; 25. Third elastic element; 30. Drive element; 40. First elastic element; 50. First sleeve; 51. Second retaining edge; 60. Second sleeve; 70. Bearing; 71. First bearing; 80. Third sleeve; 90. End cap; 111. First retaining edge; 141. Mounting hole; 211. First circumferential limiting groove; 221. Second circumferential limiting groove; 1411. Orifice; 2211. First annular groove; 100. Armor grinder; 101. Housing. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0037] Please combine Figures 1 to 4 The first embodiment of this utility model provides a nail grinding device transmission assembly 1. The nail grinding device transmission assembly 1 includes a driving member 30, a coupling assembly 20 and a main shaft 10 connected in sequence. The main shaft 10 includes a base portion 11 and a protrusion portion 12 arranged in sequence along the direction towards the coupling assembly 20. The protrusion portion 12 is connected to the coupling assembly 20. The main shaft 10 and the coupling assembly 20 rotate synchronously. The nail grinding device transmission assembly 1 also includes a first elastic member 40 and a first sleeve 50. The first elastic member 40 and the first sleeve 50 are sequentially sleeved on the base portion 11 radially outward along the main shaft 10.

[0038] Understandably, by sequentially sleeved a first elastic element 40 and a first sleeve 50 radially outward along the main shaft 10 on the base portion 11, the elastic deformation capability of the first elastic element 40 buffers the radial vibration generated during the high-speed rotation of the main shaft 10. As a flexible element, the first elastic element 40 can convert the energy of radial vibration into its own elastic potential energy, reducing vibration transmission; furthermore, the first elastic element 40 can also achieve axial damping. Simultaneously, the first sleeve 50, as a rigid support structure, is sleeved outside the first elastic element 40, providing limitation and protection for the first elastic element 40. Furthermore, the contact between the first sleeve 50 and the surrounding structure further disperses vibration energy. This design effectively suppresses the radial vibration of the main shaft 10 during high-speed rotation, contributing to improved uniformity of nail polishing and user comfort.

[0039] Optionally, the first elastic element 40 may be made of materials such as TPU (thermoplastic polyurethane elastomer) or rubber.

[0040] Please combine Figure 2 and Figure 3 Furthermore, a first retaining wall 111 is provided on the side of the base portion 11 near the protrusion portion 12, and the first retaining wall 111 extends outward along the radial direction of the main shaft 10; on the axial direction of the main shaft 10, a second retaining wall 51 is provided on the side of the first sleeve 50 away from the first retaining wall 111, and the second retaining wall 51 extends inward along the radial direction of the main shaft 10; a first elastic member 40 is disposed between the first retaining wall 111 and the second retaining wall 51.

[0041] Understandably, since the first elastic element 40 is sleeved between the first sleeve 50 and the base portion 11, and the first elastic element 40 is positioned between the first retaining wall 111 and the second retaining wall 51, the first sleeve 50 and the base portion 11 restrict the radial and axial compression deformation range of the first elastic element 40 on the main shaft 10, thereby forming a complete constraint space, ensuring that the first elastic element 40 can only undergo elastic deformation within this space during vibration. This limiting design prevents the first elastic element 40 from axially shifting or deviating during high-speed rotation and vibration of the main shaft 10, ensuring the vibration reduction effect and reliability.

[0042] Please see Figure 3 Furthermore, the distance between the first guardrail 111 and the second guardrail 51 is greater than the length of the first elastic member 40 in the axial direction of the main shaft 10.

[0043] Understandably, the distance between the first retaining wall 111 and the second retaining wall 51 is defined as D, and the length of the first elastic element 40 in the axial direction of the main shaft 10 is defined as d, where D ≥ d. By limiting the distance between the first retaining wall 111 and the second retaining wall 51 to be greater than the length of the first elastic element 40 in the axial direction of the main shaft 10, it means that the first elastic element 40 has a certain amount of axial movement allowance in the axial direction of the main shaft 10, providing sufficient deformation space for the first elastic element 40. When absorbing the radial vibration of the main shaft 10, the first elastic element 40 is compressed in the radial direction and expands in the axial direction, preventing it from getting stuck and causing buffer failure. This ensures that the first elastic element 40 can compress and rebound according to the vibration and impact during the transmission process, fully utilizing its buffering and vibration reduction function.

[0044] Please combine Figure 1 , Figure 2 and Figure 4 Furthermore, the armor grinding transmission assembly 1 also includes a second sleeve 60, which is sleeved on the base part 11; bearings 70 are respectively provided at both ends of the second sleeve 60, and the two ends of the second sleeve 60 abut against the outer ring of the bearing 70, while the inner ring of the bearing 70 is sleeved on the base part 11.

[0045] Understandably, the inner ring of the bearing 70 is fitted onto the base portion 11, and the outer ring of the bearing 70 abuts against the second sleeve 60, forming a double positioning structure that effectively restricts the radial displacement of the main shaft 10. When the main shaft 10 rotates at high speed, the bearing 70 reduces frictional resistance, lowers energy loss, and further improves transmission efficiency. Furthermore, the aforementioned mating structure between the bearing 70 and the second sleeve 60 complements the flexible vibration damping of the first elastic element 40, both by rigidly supporting and constraining the positional relationship of the main shaft 10, and by absorbing the vibration of the main shaft 10 through the first elastic element 40, forming a multi-layered suppression of radial vibration.

[0046] Please combine Figures 2 to 4 Furthermore, the bearing 70 near the coupling assembly 20 is defined as the first bearing 71, and a third sleeve 80 is provided on the side of the first bearing 71 away from the second sleeve 60. The third sleeve 80 is sleeved on the first sleeve 50.

[0047] Understandably, the third sleeve 80 is fitted onto the first sleeve 50 and located on the side of the first bearing 71 away from the second sleeve 60, further enhancing the axial positioning capability of the first bearing 71. The cooperation between the third sleeve 80 and the first sleeve 50 forms an axial limit on the first bearing 71, preventing axial movement of the first bearing 71 during high-speed rotation, thus ensuring the stability of the rotation axis of the main shaft 10. Furthermore, the third sleeve 80 fitted onto the first sleeve 50 also protects the first sleeve 50 and the first elastic element 40, ensuring a long-lasting and stable buffering effect against radial vibration.

[0048] Please combine Figure 1 , Figure 2 and Figure 4 Furthermore, the coupling assembly 20 includes a first coupling 21 and a second coupling 22, which are arranged sequentially along the direction close to the protrusion 12. The first coupling 21, the second coupling 22 and the protrusion 12 rotate synchronously. At least one first circumferential limiting groove 211 is provided at one end of the first coupling 21 near the second coupling 22, and the side of the second coupling 22 near the first coupling 21 is embedded in the first circumferential limiting groove 211. A second circumferential limiting groove 221 is provided at one end of the second coupling 22 near the protrusion 12, and the protrusion 12 is at least partially embedded in the second circumferential limiting groove 221.

[0049] Understandably, since the coupling assembly 20 includes a first coupling 21 and a second coupling 22, and the second coupling 22 is embedded in the first circumferential limiting groove 211 on the side near the first coupling 21, and the protrusion 12 is at least partially embedded in the second circumferential limiting groove 221 to form a hierarchical nested fit, precise circumferential fixation of the three can be achieved, avoiding relative rotation during transmission, reducing radial vibration caused by transmission clearance, and improving transmission synchronization and reliability. In addition, the split design of the first coupling 21 and the second coupling 22 facilitates the disassembly and replacement of individual couplings without having to replace the entire coupling assembly 20, reducing maintenance costs.

[0050] Optionally, the first coupling 21 has a first circumferential limiting groove 211 with a cross-shaped opening at one end near the second coupling 22, and the cross-sectional area of ​​the side of the second coupling 22 near the first coupling 21 is a corresponding cross shape.

[0051] Optionally, the second coupling 22 has a cross-shaped groove and a second circumferential limiting groove 221 at one end near the protrusion 12, and the cross-sectional area of ​​the protrusion 12 is the corresponding cross shape.

[0052] Please combine Figure 2 , Figure 4 and Figure 5 Furthermore, the second coupling 22 extends into the side of the first circumferential limiting groove 211 and has a first annular groove 2211. The coupling assembly 20 also includes a second elastic element 23, which is sleeved on the first annular groove 2211.

[0053] Understandably, a second elastic element 23 is fitted inside the first annular groove 2211 of the second coupling 22, forming an elastic buffer area in the radial direction where the second coupling 22 mates with the first coupling 21, thus preventing transmission shock and abnormal noise caused by loose fit. The second elastic element 23 can also compensate for the radial clearance between the first coupling 21 and the second coupling 22 caused by manufacturing or assembly errors, further suppressing vibration and noise, making the transmission process smoother and more seamless.

[0054] Optionally, the second elastic element 23 may be made of materials such as TPU (thermoplastic polyurethane elastomer) or rubber.

[0055] Please combine Figure 2 and Figure 3 Furthermore, in the radial direction of the main shaft 10, a gap 24 is left between the second coupling 22 and the protrusion 12. The coupling assembly 20 also includes a third elastic element 25, which is disposed at the gap 24 and sleeved on the protrusion 12. The two ends of the third elastic element 25 are respectively connected to the main shaft 10 and the second coupling 22.

[0056] Understandably, since there is a gap 24 between the second coupling 22 and the protrusion 12, the third elastic element 25 is disposed at the gap 24 and sleeved on the protrusion 12. The two ends of the third elastic element 25 are respectively connected to the main shaft 10 and the second coupling 22, thus forming an axial buffer area. The third elastic element 25 can effectively absorb the axial vibration generated by the rotation of the main shaft 10, preventing the vibration from being transmitted to other components through the main shaft 10 and the second coupling 22, achieving vibration isolation, which can further improve the smoothness and comfort of the grinding process, while also reducing operating noise. In addition, the deformation capability of the third elastic element 25 can enhance the adaptability of the main shaft 10 and the second coupling 22, ensuring that the main shaft 10 and the second coupling 22 can still maintain stable synchronous rotation under different working conditions.

[0057] Optionally, the third elastic element 25 is a spring.

[0058] Please combine Figure 2 and Figure 4 Furthermore, a grinding head mounting groove 13 is provided at the end of the main spindle 10 away from the coupling assembly 20. A flexible covering 14 is embedded in the grinding head mounting groove 13. The flexible covering 14 has a mounting hole 141. The opening 1411 of the mounting hole 141 is located at the end of the flexible covering 14 away from the coupling assembly 20.

[0059] Understandably, the flexible cover 14 can absorb the high-frequency vibration transmitted by the grinding head through the damping properties of the elastic material. The flexible cover 14 is embedded in the mounting groove, and its mounting hole 141 can form a flexible connection with the grinding head, which not only ensures the stable installation of the grinding head, but also reduces the transmission of vibration to the spindle 10 through the elastic deformation of the flexible material.

[0060] Optionally, the flexible cover 14 is provided with an end cap 90 at the end away from the coupling assembly 20. The end cap 90 is threadedly connected to the main shaft 10 to fix the flexible cover 14.

[0061] Please see Figure 6The second embodiment of this utility model provides a nail grinder 100, which includes a housing 101 and a nail grinder transmission assembly 1 of the first embodiment of this utility model. The nail grinder transmission assembly 1 is disposed inside the housing 101.

[0062] Understandably, the armor grinder 100 can achieve the same beneficial effects as the armor grinder transmission assembly 1, which will not be elaborated here.

[0063] Compared with the prior art, the nail grinding device transmission assembly and nail grinding device of this utility model have the following advantages: 1. This utility model provides a transmission assembly for a grinding armor, which includes a drive component, a coupling assembly, and a main shaft connected in sequence. The main shaft includes a base portion and a protrusion portion arranged in sequence along the direction towards the coupling assembly. The protrusion portion is connected to the coupling assembly, and the main shaft rotates synchronously with the coupling assembly. The transmission assembly also includes a first elastic element and a first sleeve, which are sequentially sleeved on the base portion radially outward from the main shaft. By sequentially sleeved on the base portion radially outward from the main shaft, the elastic deformation capability of the first elastic element is used to buffer the radial vibration generated when the main shaft rotates at high speed. As a flexible element, the first elastic element can convert the energy of radial vibration into its own elastic potential energy, reducing the transmission of vibration; and the first elastic element can also achieve axial buffering and vibration reduction. At the same time, the first sleeve, as a rigid support structure, is sleeved on the outside of the first elastic element, which limits and protects the first elastic element, and further disperses the vibration energy through the contact between the first sleeve and the surrounding structure. This design effectively suppresses radial vibration of the spindle during high-speed rotation, which helps improve the uniformity of nail polishing and user comfort.

[0064] 2. In this embodiment of the invention, a first retaining wall is provided on the side of the base portion near the protrusion, extending radially outward along the main shaft. A second retaining wall is provided on the side of the first sleeve away from the first retaining wall, extending radially inward along the main shaft. A first elastic element is disposed between the first and second retaining walls. Because the first elastic element is sleeved between the first sleeve and the base portion, and is disposed between the first and second retaining walls, the first sleeve and the base portion restrict the compressive deformation range of the first elastic element in the radial and axial directions of the main shaft, thereby forming a complete constraint space. This ensures that the first elastic element can only undergo elastic deformation within this space during vibration. This limiting design prevents the first elastic element from axially shifting or deviating during high-speed rotation and vibration of the main shaft, ensuring the vibration reduction effect and reliability.

[0065] 3. In this embodiment of the invention, the distance between the first and second retaining edges is greater than the axial length of the first elastic element on the main shaft. By limiting the distance between the first and second retaining edges to be greater than the axial length of the first elastic element on the main shaft, it means that the first elastic element has a certain amount of axial movement allowance on the main shaft, providing sufficient deformation space for the first elastic element. When absorbing radial vibration of the main shaft, the first elastic element is compressed in the radial direction and expands in the axial direction, preventing it from getting stuck and causing buffer failure. This ensures that the first elastic element can compress and rebound according to the vibration and impact during the transmission process, fully utilizing its buffering and vibration reduction function.

[0066] 4. The armor grinder transmission assembly provided in this embodiment of the present invention further includes a second sleeve, which is fitted onto the base. Bearings are respectively provided at both ends of the second sleeve, with each end abutting against the outer ring of the bearing, and the inner ring of the bearing fitting onto the base. The bearings at both ends of the second sleeve provide rigid support for the main shaft, enhancing the rotational concentricity of the main shaft and significantly reducing radial runout during high-speed rotation. The inner ring of the bearing fitting onto the base and the outer ring abutting against the second sleeve form a double-positioning structure, effectively limiting the radial displacement of the main shaft. The bearings reduce frictional resistance and energy loss during high-speed rotation of the main shaft, further improving transmission efficiency. Furthermore, the aforementioned bearing-sleeve mating structure complements the flexible vibration damping of the first elastic element, both by rigidly supporting and constraining the positional relationship of the main shaft, and by absorbing the vibration of the main shaft through the first elastic element, forming a multi-layered suppression of radial vibration.

[0067] 5. In this embodiment of the present invention, the bearing closest to the coupling assembly is defined as the first bearing. A third sleeve is provided on the side of the first bearing away from the second sleeve, and the third sleeve is fitted onto the first sleeve. The third sleeve, fitted onto the first sleeve and located on the side of the first bearing away from the second sleeve, further enhances the axial positioning capability of the bearing. The cooperation between the third sleeve and the first sleeve forms an axial limit on the first bearing, preventing axial movement of the bearing during high-speed rotation and ensuring that the rotation axis of the main shaft remains stable. Furthermore, the third sleeve fitted onto the first sleeve also protects the first sleeve and the first elastic element, ensuring a durable and stable buffering effect against radial vibration.

[0068] 6. The coupling assembly provided in this embodiment of the present invention includes a first coupling and a second coupling, which are arranged sequentially along the direction close to the protrusion. The first coupling, the second coupling, and the protrusion rotate synchronously. At least one first circumferential limiting groove is provided at one end of the first coupling near the second coupling, and the side of the second coupling near the first coupling is embedded in the first circumferential limiting groove. A second circumferential limiting groove is provided at one end of the second coupling near the protrusion, and the protrusion is at least partially embedded in the second circumferential limiting groove. Since the coupling assembly includes a first coupling and a second coupling, and the second coupling is embedded in the first circumferential limiting groove on the side close to the first coupling, and the protrusion is at least partially embedded in the second circumferential limiting groove, a hierarchical nested fit is formed. This achieves precise circumferential fixation of the three components, avoids relative rotation during transmission, reduces radial vibration caused by transmission gaps, and improves transmission synchronization and reliability. In addition, the separate design of the first and second couplings facilitates the disassembly and replacement of individual couplings without having to replace the entire coupling assembly, thus reducing maintenance costs.

[0069] 7. In this embodiment of the invention, the second coupling extending into the first circumferential limiting groove has a first annular groove on its side. The coupling assembly also includes a second elastic element, which is sleeved on the first annular groove. The second elastic element is sleeved in the first annular groove of the second coupling, forming an elastic buffer area in the radial direction where the second coupling mates with the first coupling, thus avoiding transmission impact and abnormal noise caused by loose fit. The second elastic element can also compensate for the radial clearance between the first coupling and the second coupling caused by manufacturing or assembly errors, further suppressing vibration and noise, and making the transmission process smoother and more fluid.

[0070] 8. In this embodiment of the invention, a gap is left between the second coupling and the protrusion in the radial direction of the main shaft. The coupling assembly also includes a third elastic element, which is disposed at the gap and sleeved on the protrusion. The two ends of the third elastic element are respectively connected to the main shaft and the second coupling. Because of the gap between the second coupling and the protrusion, and the third elastic element being disposed at the gap and sleeved on the protrusion, with its two ends connected to the main shaft and the second coupling, an axial buffer area is formed. The third elastic element can effectively absorb the axial vibration generated by the rotation of the main shaft, preventing the vibration from being transmitted to other components through the main shaft and the second coupling, thus achieving vibration isolation. This further improves the smoothness and comfort of the grinding process and reduces operating noise. Furthermore, the deformation capability of the third elastic element enhances the adaptability of the main shaft and the second coupling, ensuring that the main shaft and the second coupling can maintain stable synchronous rotation under different working conditions.

[0071] 9. In this embodiment of the invention, the spindle has a grinding head mounting groove at the end furthest from the coupling assembly. A flexible covering is embedded in the grinding head mounting groove, and the flexible covering has a mounting hole. The opening of the mounting hole is located at the end of the flexible covering furthest from the coupling assembly. The flexible covering absorbs the high-frequency vibration transmitted by the grinding head through the damping properties of the elastic material. The flexible covering is embedded in the mounting groove, and its mounting hole and the grinding head form a flexible connection, which ensures the stable installation of the grinding head and reduces the transmission of vibration to the spindle through the elastic deformation of the flexible material.

[0072] 10. The nail grinder provided in this embodiment of the present invention includes a housing and the aforementioned nail grinder transmission assembly, the transmission assembly being disposed within the housing. The nail grinder achieves the same beneficial effects as the nail grinder transmission assembly, which will not be described in detail here.

[0073] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transmission assembly for an armor grinder, characterized in that: The armor grinder transmission assembly includes a drive component, a coupling assembly, and a main shaft connected in sequence. The main shaft includes a base portion and a protrusion portion arranged in sequence along the direction towards the coupling assembly. The protrusion portion is connected to the coupling assembly. The main shaft rotates synchronously with the coupling assembly. The armor grinder transmission assembly also includes a first elastic element and a first sleeve. The first elastic element and the first sleeve are sequentially sleeved on the base portion radially outward along the main shaft.

2. The armor grinder transmission assembly as described in claim 1, characterized in that: A first retaining edge is provided on the side of the base near the protrusion, and the first retaining edge extends radially outward along the main shaft; on the axial direction of the main shaft, a second retaining edge is provided on the side of the first sleeve away from the first retaining edge, and the second retaining edge extends radially inward along the main shaft; the first elastic element is disposed between the first retaining edge and the second retaining edge.

3. The armor grinder transmission assembly as described in claim 2, characterized in that: The distance between the first and second retaining walls is greater than the length of the first elastic element in the axial direction of the main shaft.

4. The armor grinder transmission assembly as described in claim 1, characterized in that: The armor grinder transmission assembly also includes a second sleeve, which is sleeved on the base portion; bearings are respectively provided at both ends of the second sleeve, and the two ends of the second sleeve abut against the outer ring of the bearing, while the inner ring of the bearing is sleeved on the base portion.

5. The armor grinder transmission assembly as described in claim 4, characterized in that: The bearing closest to the coupling assembly is defined as the first bearing, and a third sleeve is provided on the side of the first bearing away from the second sleeve, and the third sleeve is sleeved on the first sleeve.

6. The armor grinder transmission assembly as described in claim 1, characterized in that: The coupling assembly includes a first coupling and a second coupling, which are arranged sequentially along the direction close to the protrusion. The first coupling, the second coupling, and the protrusion rotate synchronously. At least one first circumferential limiting groove is provided at one end of the first coupling near the second coupling, and the side of the second coupling near the first coupling is embedded in the first circumferential limiting groove. A second circumferential limiting groove is provided at one end of the second coupling near the protrusion, and the protrusion is at least partially embedded in the second circumferential limiting groove.

7. The armor grinder transmission assembly as described in claim 6, characterized in that: The second coupling extends into the side of the first circumferential limiting groove and has a first annular groove. The coupling assembly also includes a second elastic element, which is sleeved on the first annular groove.

8. The armor grinder transmission assembly as described in claim 6, characterized in that: In the radial direction of the main shaft, there is a gap between the second coupling and the protrusion. The coupling assembly also includes a third elastic element, which is disposed in the gap and sleeved on the protrusion. The two ends of the third elastic element are respectively connected to the main shaft and the second coupling.

9. The armor grinder transmission assembly as described in claim 1, characterized in that: The main shaft has a grinding head mounting groove at the end away from the coupling assembly. A flexible covering is embedded in the grinding head mounting groove. The flexible covering has a mounting hole, and the opening of the mounting hole is located at the end of the flexible covering away from the coupling assembly.

10. A nail grinder, characterized in that: The armor grinder includes a housing and an armor grinder transmission assembly as described in any one of claims 1 to 9, the armor grinder transmission assembly being disposed within the housing.

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