Elastic damping locking mechanism facilitating sliding of motor stator

Abstract

This application relates to an elastic damping and locking mechanism for facilitating the sliding of a motor stator, and pertains to the technical field of glass grinding equipment. It includes a drive motor housed within a housing, comprising a stator that slides within the housing. The stator has strip-shaped grooves on opposite sides of its outer periphery along the sliding direction. The housing has through holes leading to these grooves. A bolt is positioned at the through hole, a compression spring is located below the bolt, a ball joint is located below the compression spring, and a top ball is located below the ball joint. The bottom end of the top ball protrudes from the through hole and rolls into the strip-shaped grooves. This application achieves low-friction guidance through the rolling of the top ball within the strip-shaped grooves, and absorbs and dissipates grinding vibrations through spring compression and rebound. This transforms the rigid contact between the stator and the housing into an elastic contact, effectively buffering and isolating vibrations, protecting precision components such as bearings, extending equipment life, reducing loose connections and control interference, and preventing grinding head wobbling, thereby ensuring the accuracy and yield of glass grinding.

Description

Technical Field

[0001] This application relates to the technical field of glass grinding equipment, and in particular to the vibration damping structure of glass edging equipment. Background Technology

[0002] Glass grinding is a common process in glass processing, used to remove excess material from the glass edges to improve assembly accuracy. To improve processing efficiency, double-head edging machines are widely used in glass grinding. These machines employ two coaxially nested, relatively extendable grinding heads. The two heads rotate coaxially, performing rough grinding and fine finishing on the glass edges respectively, completing both processes in a single feed. During grinding, the feed mechanism drives the two grinding heads to move towards the glass edge to the grinding position.

[0003] In existing technologies, there are two main types of feed drive methods for dual-head edging machines. One method involves fixing the drive motor housing to a sliding base, with the power output end of the feed mechanism connected to the sliding base. During operation, the feed mechanism pushes the sliding base, causing the entire motor to move towards the glass to achieve feeding. The other method involves fixing the drive motor housing, while designing the stator to slide within the housing. The power output end of the feed mechanism is fixedly connected to the stator via a connector. During operation, the feed mechanism pushes the stator to slide relative to the housing, thereby driving the rotor and grinding head to move and achieve feeding.

[0004] However, vibration is unavoidable during glass grinding. This vibration is transmitted from the grinding head through the rotor and stator to the machine housing, and finally to the feed mechanism and machine body. Long-term, high-frequency vibration accelerates the wear of precision components such as bearings and the feed mechanism, as well as loosening of connectors and fasteners. This leads to increased clearances, decreased motion accuracy, and may even cause components to detach, resulting in safety accidents. Furthermore, the deterioration of these components can, in turn, affect grinding stability, causing the grinding head to wobble in contact with the glass. This can result in uneven grinding at the glass edges, or even chipping and cracking, severely impacting processing accuracy and product yield. Utility Model Content

[0005] In view of the shortcomings of the existing technology, one of the purposes of this utility model is to provide an elastic damping and locking mechanism that facilitates the sliding of the motor stator.

[0006] The elastic damping and locking mechanism for facilitating the sliding of the motor stator provided in this application adopts the following technical solution:

[0007] An elastic damping and locking mechanism for facilitating the sliding of a motor stator includes a drive motor that drives the grinding head to rotate. The drive motor is housed inside a housing. The drive motor includes a stator that slides with the housing. On opposite sides of the outer periphery of the stator, strip-shaped grooves are provided along the sliding direction of the stator.

[0008] The housing has a through hole at at least one position corresponding to the strip groove, leading to the corresponding strip groove;

[0009] The through hole is provided with an internal thread, and a bolt is provided at the through hole. The bolt is connected to the housing thread through the internal thread.

[0010] A compression spring is provided below the bolt, a ball cup is provided below the compression spring, and a top ball is provided below the ball cup;

[0011] The bolt presses against the spring, causing the top ball to face the groove.

[0012] The top of the top bead rotates and engages with the ball bowl, while the bottom of the top bead protrudes from the through hole and rolls and engages with the strip groove.

[0013] In a dual-head edging machine with a sliding fit between the drive motor and the housing, vibrations are transmitted from the grinding head through the rotor and stator to the housing and subsequent components during glass grinding. This can lead to bearing wear and loose connections, affecting the service life of the dual-head edging machine and the grinding quality of the glass. This application addresses this issue by creating strip-shaped grooves on opposite sides of the stator's outer periphery and through holes at least one corresponding position on the housing. Bolts, a compression spring, a ball joint, and a top ball are installed, with the bolts and top ball pressing against the compression spring. This allows the top ball to rotate within the ball joint and roll within the strip-shaped groove as the stator slides relative to the housing, achieving low-friction sliding. Simultaneously, the compression spring is pressed by the bolts, continuously applying elastic pressure to the top ball via the ball joint, transforming the rigid contact between the stator and the housing into an elastic contact. When the vibration generated by grinding is transmitted to the stator, the vibration energy is transferred to the clamping spring through the top ball. The compression and rebound of the clamping spring absorb and dissipate the vibration energy, significantly reducing the vibration transmitted to the housing and subsequent components. This allows the stator to slide smoothly relative to the housing while effectively buffering and isolating grinding vibration, protecting precision components such as bearings and feed mechanisms, extending equipment life, and reducing control interference and loose connections caused by vibration. This avoids large-scale shaking of the grinding head and ultimately ensures the accuracy and yield of glass grinding.

[0014] Preferably, the housing has at least two opposing through holes corresponding to the two opposing strip grooves;

[0015] The through hole is provided with an internal thread, and a bolt is provided at the through hole. The bolt is connected to the machine housing thread through the internal thread.

[0016] A compression spring is installed below the bolt, a ball cup is installed below the compression spring, and a top ball is installed below the ball cup.

[0017] The bolt presses against the spring, causing the top ball to face the groove.

[0018] The top of the top bead rotates and engages with the ball bowl, while the bottom of the top bead protrudes from the through hole and rolls and engages with the strip groove.

[0019] With only a single-sided top ball spring mechanism, the top ball pushes the stator to the other side, causing one-sided contact friction between the stator and the housing. Simultaneously, single-point support is insufficient to effectively restrict the stator's circumferential rotation, resulting in limited load-bearing capacity and vibration damping. This technical solution addresses this by installing top ball spring mechanisms on both opposite sides of the stator's outer periphery. This ensures both top balls press against the stator, achieving force balance and keeping the stator in a centered position, avoiding friction and wear caused by unilateral misalignment. Simultaneous guidance from both sides significantly improves the stability and guiding accuracy of stator sliding; multiple springs work together to disperse and absorb vibration energy, resulting in more uniform and efficient vibration damping. Furthermore, the dual-sided arrangement restricts the stator's circumferential rotation from different directions, enhancing torsional resistance. In addition, this structure features redundancy; even if one side's top ball spring mechanism fails unexpectedly, the other side can still maintain basic functionality.

[0020] Preferably, the inner wall of the through hole near the top bead is provided with an inwardly constricted annular opening, the diameter of which is smaller than the diameter of the top bead.

[0021] By adopting the above technical solution, the diameter of the constricted opening formed by the annular constriction is smaller than the diameter of the top ball, which can prevent the top ball from falling out due to excessive gap between the stator and the housing when the stator vibrates. Furthermore, the constriction design allows the top ball to be reliably contained within the through hole without the need for additional assembly parts, thus simplifying assembly.

[0022] Preferably, a bellows is fixedly connected to the outer periphery of the stator, and the other end of the bellows is fixed to the housing, and the bellows seals the gap between the stator and the housing.

[0023] Because the stator and housing have a sliding fit, there is inevitably relative movement between them, resulting in a clearance. During glass grinding, as the stator slides relative to the housing, the grooves on the outer periphery of the stator are periodically exposed to the external environment. Simultaneously, the clearance itself can become a channel for impurities such as glass dust and coolant to enter. Once these impurities enter the grooves or through-holes, they interfere with the rolling of the top ball, the extension and contraction of the compression spring, and the rotation of the ball cup, leading to top ball jamming, compression spring failure, and accelerated wear. Ultimately, this affects the vibration damping performance and guiding accuracy of the entire mechanism, shortening the equipment's lifespan. This technical solution addresses this by installing a bellows between the outer periphery of the stator and the housing, with both ends of the bellows fixedly connected to the stator and housing respectively. This bellows seals the clearance between the stator and housing. When the stator slides relative to the housing, the bellows is stretched or compressed in the sliding direction, dynamically maintaining a closed state, effectively preventing external impurities from entering the clearance and the grooves. This provides a clean working environment for components such as the top ball, compression spring, and ball cup while ensuring smooth stator sliding, significantly improving the reliability and durability of the elastic damping locking mechanism.

[0024] Preferably, a damping membrane is provided on the outer periphery of the stator in the area other than the strip groove.

[0025] The contact between the top ball and the grooved area provides elastic damping, but this damping effect is mainly concentrated in the local contact area between the top ball and the grooved area, and is a point-contact damping method. This technical solution adds a damping membrane to the non-grooved area on the outer periphery of the stator. When the stator vibrates and contacts the housing, the non-grooved area of ​​the stator can also absorb and reduce the transmission of vibration, forming a dual damping effect combining point and surface damping with the compression spring at the top ball. Furthermore, since the damping membrane is only installed in the non-grooved area, it completely avoids the rolling contact path between the top ball and the grooved area, thus not interfering with the rolling of the top ball or affecting the relative sliding between the stator and the housing.

[0026] Preferably, there is a gap between the stator and the inner wall of the housing that allows the stator to slide relative to the housing. On opposite sides of the outer periphery of the stator where the strip groove is provided, the sum of the radius differences between the stator and the inner wall of the housing is less than 0.2 mm and greater than 0.05 mm.

[0027] The gap created by the difference in radii between the stator and the housing is necessary to allow the stator to slide relative to the housing. If the sum of the gaps is too large, the top balls require a greater spring preload to press the stator towards the center, which increases the contact stress between the top balls and the grooved slots, accelerating wear on both. Simultaneously, an excessively large gap can cause the stator to experience significant radial wobble when subjected to external forces, affecting guiding accuracy and the stability of the damping effect. If the sum of the gaps is too small, the frictional resistance between the stator and the housing increases, resulting in uneven sliding and potential jamming. This technical solution controls the sum of the two radius differences within 0.05~0.2 mm, ensuring that the top balls can stably press the stator with a moderate preload and slide smoothly.

[0028] Preferably, the cross-section of the strip groove is V-shaped.

[0029] By adopting the above technical solution, when the top ball rolls within the V-shaped groove, it automatically tends towards the center of the groove bottom, ensuring that the stator remains in the center position and avoiding skewing caused by machining errors or uneven force. Simultaneously, the side walls of the V-shaped groove allow the stator to slide only along the opening direction of the groove, thereby improving guiding accuracy and motion stability, and preventing additional vibrations caused by unstable rolling of the top ball.

[0030] Preferably, the through hole includes an upper section with internal threads and a lower section with a smooth inner wall, the bolt is threaded to the upper section, and the ball cup, compression spring and top ball are disposed in the lower section.

[0031] By adopting the above technical solution, the bolt only engages with the threaded upper section, ensuring a stable connection between the bolt and the housing. The top ball rolls within the lower section with a smooth inner wall, avoiding potential jamming or additional friction from threaded contact and ensuring its flexible rotation. Meanwhile, the compression spring compresses and rebounds within the lower section with its smooth inner wall, preventing jamming or stress concentration due to the threaded grooves. This allows the spring's characteristics to function stably, ensuring stable elastic damping.

[0032] Preferably, the compression spring is a wave spring.

[0033] Wave springs, with their unique thin-plate, ring-shaped wave structure, can provide ideal elastic force within a limited space. Furthermore, for the same elastic force, the height of a wave spring is only 50% of that of a traditional spring, making it particularly suitable for size-constrained applications. Simultaneously, wave springs possess excellent vibration damping and noise reduction properties, effectively absorbing high-frequency vibrations and reducing operating noise. Moreover, the 360° uniform force application characteristic of wave springs ensures more even force distribution on the top ball, avoiding localized stress concentration. Therefore, the use of wave springs further optimizes the vibration damping effect and space utilization of the elastic damping locking mechanism.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. In a dual-head edging machine with a sliding fit between the drive motor and the housing, vibrations are transmitted from the grinding head through the rotor and stator to the housing and subsequent components during glass grinding. This can lead to bearing wear and loose connections, affecting the service life of the dual-head edging machine and the grinding quality of the glass. This application addresses this issue by creating strip-shaped grooves on opposite sides of the stator's outer periphery, and through holes at least one corresponding position on the housing. Bolts, a compression spring, a ball joint, and a top ball are installed, with the bolts and top ball pressing against the compression spring. This allows the top ball to rotate within the ball joint and roll within the strip-shaped groove as the stator slides relative to the housing, achieving low-friction sliding. Simultaneously, the compression spring is pressed by the bolts, and elastic pressure is constantly applied to the top ball via the ball joint, transforming the rigid contact between the stator and the housing into an elastic contact. When the vibration generated by grinding is transmitted to the stator, the vibration energy is transmitted to the clamping spring through the top ball. The compression and rebound of the clamping spring absorb and dissipate the vibration energy, significantly reducing the vibration transmitted to the housing and subsequent components. Thus, this application can achieve smooth sliding of the stator relative to the housing while effectively buffering and isolating grinding vibration, protecting precision components such as bearings and feed mechanisms, extending equipment life, and reducing control interference and loose connections caused by vibration. This avoids large shaking of the grinding head and ultimately ensures the accuracy and yield of glass grinding.

[0036] 2. When only a single-sided top ball spring mechanism is used, the top ball pushes the stator to the other side, causing unilateral contact friction between the stator and the housing. Simultaneously, single-point support is insufficient to effectively restrict the stator's circumferential rotation, resulting in limited load-bearing capacity and vibration damping. This technical solution addresses this by installing top ball spring mechanisms on both opposite sides of the stator's outer periphery. This ensures that the top balls on both sides press against the stator, achieving force balance and keeping the stator in a centered position, thus avoiding friction and wear caused by unilateral misalignment. Simultaneous guidance from both sides significantly improves the stability and guiding accuracy of the stator's sliding. Multiple springs work together to disperse and absorb vibration energy, resulting in more uniform and efficient vibration damping. Furthermore, the dual-sided arrangement restricts the stator's circumferential rotation from different directions, enhancing torsional resistance. In addition, this structure has a redundant design; even if one side of the top ball spring mechanism fails unexpectedly, the other side can still maintain basic functionality.

[0037] 3. The diameter of the constricted opening formed by the annular opening is smaller than the diameter of the top ball, which can prevent the top ball from falling out due to excessive gap between the stator and the housing when the stator vibrates. Furthermore, the constricted opening design allows the top ball to be reliably contained within the through hole without the need for additional assembly parts, thus simplifying assembly. Attached Figure Description

[0038] Figure 1This is a schematic diagram illustrating the structure of an elastic damping and locking mechanism that facilitates the sliding of the motor stator, as shown in this embodiment of the application.

[0039] Figure 2 for Figure 1 The cross-sectional view along AA is a schematic diagram of the internal structure of the elastic damping and locking mechanism that facilitates the sliding of the motor stator.

[0040] Figure 3 yes Figure 2 The enlarged view in section B shows the positional relationship of the strip groove, through hole, bolt, compression spring, ball cup, top bead, and annular rim.

[0041] Reference numerals in the attached drawings: 1. Housing; 2. Stator; 3. Strip groove; 4. Through hole; 5. Bolt; 6. Compression spring; 7. Ball cup; 8. Top ball; 9. Annular constriction; 10. Bellows; 11. Connecting piece. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0043] This application discloses an elastic damping and locking mechanism that facilitates the sliding of the motor stator.

[0044] Reference Figure 1 , Figure 2 and Figure 3 An elastic damping and locking mechanism that facilitates the sliding of the motor stator includes a drive motor that drives the grinding head to rotate. The drive motor is located inside a housing 1. The drive motor includes a stator 2 that slides with the housing 1 and a rotor located inside the stator 2.

[0045] The sliding fit between the stator 2 and the housing 1 allows the stator 2 to move relative to the housing 1 along the grinding direction, thereby realizing the feed motion.

[0046] On both opposite sides of the outer periphery of the stator 2, a strip-shaped groove 3 is provided along the sliding direction of the stator 2;

[0047] At least one position of the housing 1 corresponding to the strip groove 3 is provided with a through hole 4 leading to the corresponding strip groove 3;

[0048] An internal thread is provided in the through hole 4, and a bolt 5 is provided at the through hole 4. The bolt 5 is threadedly connected to the housing 1 through the internal thread.

[0049] A compression spring 6 is provided below the bolt 5, and a ball cup 7 is provided below the compression spring 6. The ball cup 7 has a flat surface and a concave curved surface. The compression spring 6 presses against the flat surface of the ball cup 7. A top bead 8 is provided below the ball cup 7, and the top bead 8 contacts the concave curved surface of the ball cup 7.

[0050] Bolt 5 presses against spring 6, causing top bead 8 to face the groove 3;

[0051] The top of the top bead 8 rotates and engages with the ball bowl 7, while the bottom of the top bead 8 protrudes from the through hole 4 and rolls and engages with the strip groove 3.

[0052] When bolt 5 is screwed in, the end of bolt 5 presses against the compression spring 6, and the compression spring 6 then transmits the pressure to the top ball 8 through the ball cup 7, so that the top ball 8 always presses against the strip groove 3 with a certain preload.

[0053] During grinding, the two grinding heads of the dual-head edging machine are driven to move towards the edge of the glass by a feeding mechanism. Specifically, the housing 1 of the drive motor is fixedly installed, and there is a sliding gap between the stator 2 and the housing 1. The stator 2 and the housing 1 are slidably engaged. The power output end of the feeding mechanism is fixedly connected to the stator 2 through a connector 11. During operation, the feeding mechanism pushes the stator 2 to slide relative to the housing 1, thereby driving the rotor and grinding head to move and achieve feeding.

[0054] During glass grinding, vibration is inevitable. This vibration is transmitted from the grinding head through the rotor and stator 2 to the housing 1 and subsequent components, causing bearing wear and loosening of connections. This affects the service life of the double-head edging machine and the grinding quality of the glass. This application addresses this issue by creating strip-shaped grooves 3 on opposite sides of the outer periphery of the stator 2, and through holes 4 at at least one corresponding position on the housing 1. Bolts 5, a compression spring 6, a ball cup 7, and a top ball 8 are installed. The bolts 5 and the top ball 8 press against the compression spring 6, allowing the top ball 8 to rotate within the ball cup 7 and roll within the strip-shaped grooves 3 as the stator 2 slides relative to the housing 1. This achieves low-friction sliding, while the compression spring 6 is pressed by the bolts 5, continuously applying elastic pressure to the top ball 8 via the ball cup 7. This transforms the rigid contact between the stator 2 and the housing 1 into an elastic contact.

[0055] When the vibration generated by grinding is transmitted to the stator 2, the vibration energy is transmitted to the compression spring 6 through the top ball 8. The compression and rebound of the compression spring 6 absorb and dissipate the vibration energy, significantly reducing the vibration transmitted to the housing 1 and subsequent components. This allows the stator 2 to slide smoothly relative to the housing 1 while effectively buffering and isolating grinding vibration, protecting precision components such as bearings and feed mechanisms, extending equipment life, and reducing control interference and loose connections caused by vibration. This avoids large shaking of the grinding head and ultimately ensures the accuracy and yield of glass grinding.

[0056] In this application, the housing 1 has at least two opposing through holes 4 corresponding to two opposing strip grooves 3;

[0057] An internal thread is provided in the through hole 4, and a bolt 5 is provided at the through hole 4. The bolt 5 is threaded to the housing 1 through the internal thread.

[0058] A clamping spring 6 is installed below bolt 5, a ball cup 7 is installed below clamping spring 6, and a top ball 8 is installed below ball cup 7;

[0059] Bolt 5 presses against spring 6, causing top bead 8 to face the groove 3;

[0060] The top of the top bead 8 rotates and engages with the ball bowl 7, while the bottom of the top bead 8 protrudes from the through hole 4 and rolls and engages with the strip groove 3.

[0061] With only a single-sided top ball spring mechanism, the top ball 8 pushes the stator 2 to the other side, causing unilateral contact friction between the stator 2 and the housing 1. Simultaneously, single-point support is insufficient to effectively restrict the circumferential rotation of the stator 2, resulting in limited load-bearing capacity and vibration damping. This technical solution addresses this by installing top ball spring mechanisms on both opposite sides of the stator 2's outer periphery. This ensures that both top balls 8 press against the stator 2, achieving force balance and keeping the stator 2 in a centered position, avoiding friction and wear caused by unilateral misalignment. The simultaneous guidance of both top balls 8 significantly improves the stability and guiding accuracy of the stator 2's sliding; the coordinated work of multiple springs disperses and absorbs vibration energy, resulting in more uniform and efficient vibration damping. Furthermore, the dual-sided arrangement restricts the circumferential rotation of the stator 2 from different directions, enhancing torsional resistance. In addition, this structure features redundancy; even if one side of the top ball spring mechanism fails unexpectedly, the other side can still maintain basic functionality.

[0062] The inner wall of the through hole 4 near the top bead 8 is provided with an inwardly constricted annular opening 9, the diameter of which is smaller than the diameter of the top bead 8.

[0063] The diameter of the constricted opening 9 is smaller than that of the top ball 8, which prevents the top ball 8 from coming out due to excessive gap between the stator 2 and the housing 1 when the stator 2 vibrates. Furthermore, the constricted opening design allows the top ball 8 to be reliably contained within the through hole 4 without the need for additional assembly parts, thus simplifying assembly.

[0064] The side of the annular opening 9 facing the top bead 8 is machined into a concave arc surface. The radius of curvature of this arc surface is approximately the same as the spherical radius of the top bead 8, so that the annular opening 9 has an arc surface that fits with the surface of the top bead 8.

[0065] A bellows 10 is fixedly connected to the outer periphery of the stator 2, and the other end of the bellows 10 is fixed to the housing 1. The bellows 10 seals the gap between the stator 2 and the housing 1.

[0066] Since the stator 2 and the housing 1 are in a sliding fit, there will inevitably be relative movement between them, and a clearance will inevitably be generated. During the glass grinding process, when the stator 2 slides relative to the housing 1, the strip groove 3 on the outer periphery of the stator 2 will be periodically exposed to the external environment. At the same time, the clearance itself can also become a channel for impurities such as glass dust and coolant to enter. Once these impurities enter the strip groove 3 or the through hole 4, they will interfere with the rolling of the top ball 8, the extension and contraction of the compression spring 6, and the rotation of the ball cup 7, causing the top ball 8 to jam, the compression spring 6 to fail, and wear to accelerate. Ultimately, this will affect the vibration damping performance and guiding accuracy of the entire mechanism, and shorten the service life of the equipment.

[0067] By installing a bellows 10 between the outer periphery of the stator 2 and the housing 1, and fixing both ends of the bellows 10 to the stator 2 and the housing 1 respectively, the bellows 10 seals the fitting gap between the stator 2 and the housing 1. When the stator 2 slides relative to the housing 1, the bellows 10 is stretched or compressed in the sliding direction, always dynamically maintaining a closed state, effectively preventing external impurities from entering the fitting gap and the interior of the strip groove 3. Thus, while ensuring the smooth sliding of the stator 2, a clean working environment is provided for components such as the top ball 8, the compression spring 6, and the ball cup 7, significantly improving the reliability and durability of the elastic damping locking mechanism.

[0068] A damping membrane is provided on the outer periphery of the stator 2, in the area that is not the strip groove 3. The damping membrane is made of polyurethane.

[0069] Polyurethane material has excellent elasticity, which can effectively absorb high-frequency vibration energy. Moreover, the thickness of the polyurethane film is less than the single-sided gap between the stator 2 and the housing 1, ensuring that the damping film will not generate additional sliding resistance when the stator 2 slides.

[0070] The contact between the top ball 8 and the groove 3 achieves elastic damping, but this damping effect is mainly concentrated in the local contact area between the top ball 8 and the groove 3, and is a point-contact damping. This technical solution adds a damping membrane to the non-groove 3 area on the outer periphery of the stator 2. When the stator 2 vibrates and contacts the housing 1, the non-groove 3 area of ​​the stator 2 can also absorb and reduce the transmission of vibration, forming a point-to-surface dual damping effect in conjunction with the compression spring 6 at the top ball 8. Furthermore, since the damping membrane is only set in the non-groove 3 area, it completely avoids the rolling contact path between the top ball 8 and the groove 3, thus not interfering with the rolling of the top ball 8, nor affecting the relative sliding between the stator 2 and the housing 1.

[0071] There is a gap between the stator 2 and the inner wall of the housing 1, which allows the stator 2 to slide relative to the housing 1. On the opposite sides of the outer periphery of the stator 2 with the strip groove 3, the sum of the radius difference between the stator 2 and the inner wall of the housing 1 is less than 0.2 mm and greater than 0.05 mm.

[0072] The gap created by the radius difference between stator 2 and housing 1 is to allow stator 2 to slide relative to housing 1. If the sum of the gaps is too large, the top ball 8 will require a larger spring preload to press stator 2 towards the center position. This will increase the contact stress between the top ball 8 and the strip groove 3, accelerating wear on both. Simultaneously, an excessively large gap will cause stator 2 to experience significant radial wobble when subjected to external forces, affecting guiding accuracy and the stability of the shock absorption effect. If the sum of the gaps is too small, the frictional resistance between stator 2 and housing 1 will increase, resulting in uneven sliding and potential jamming. This technical solution controls the sum of the two radius differences within 0.05~0.2 mm, ensuring that the top ball 8 can stably press the stator 2 with a moderate preload and achieve stable sliding.

[0073] The cross-section of the strip groove 3 is V-shaped, meaning that the two side walls of the V-shaped strip groove 3 are symmetrically distributed at a certain included angle. This included angle can usually be selected as 60 degrees, 90 degrees, or 120 degrees depending on the diameter of the top bead 8 and the force requirements. In this embodiment, the included angle is 120 degrees. When the top bead 8 is placed in the V-shaped strip groove 3, the top bead 8 forms two-point contact with the two side walls.

[0074] When the top ball 8 rolls within the V-shaped groove 3, it automatically tends towards the center of the groove bottom, ensuring that the stator 2 remains centered and preventing skewing due to machining errors or uneven force. Simultaneously, the side walls of the V-shaped groove 3 allow the stator 2 to slide only along the opening direction of the groove 3, thereby improving guiding accuracy and motion stability, and preventing additional vibrations caused by unstable rolling of the top ball 8.

[0075] The through hole 4 includes an upper hole section with internal threads and a lower hole section with a smooth inner wall. The upper hole section is close to the outer surface of the housing 1 and has internal threads machined on its inner wall. The bolt 5 is threaded into the upper hole section. The lower hole section is close to the strip groove 3 and has a smooth inner wall without threads. The ball cup 7, the compression spring 6, and the top ball 8 are located in the lower hole section.

[0076] Bolt 5 only engages with the threaded upper section, ensuring a stable connection between bolt 5 and the housing. The top ball 8 rolls within the lower section with a smooth inner wall, avoiding potential jamming or additional friction from threaded contact and ensuring its free rotation. The compression spring 6 compresses and rebounds within the lower section with its smooth inner wall, preventing jamming or stress concentration due to the threaded groove, allowing the spring's characteristics to function stably and ensuring stable elastic damping.

[0077] The compression spring 6 is a wave spring, with one end abutting against the bolt 5 and the other end abutting against the plane of the ball cup 7. In this application, the depth of the through hole 4 is limited. The wave spring, with its unique thin-film annular wave structure, can provide ideal elastic force within a limited space. Furthermore, under the same elastic force, the height of the wave spring is only 50% of that of a traditional spring, making it particularly suitable for size-constrained applications. Simultaneously, the wave spring has excellent vibration damping and noise reduction performance, effectively absorbing high-frequency vibrations and reducing operating noise. Moreover, the wave spring's 360° uniform force application characteristic ensures more balanced force distribution on the top ball 8, avoiding localized stress concentration. Therefore, the use of a wave spring further optimizes the vibration damping effect and space utilization of the elastic damping locking mechanism.

[0078] The above are all preferred embodiments 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. An elastic damping and locking mechanism for facilitating the sliding of a motor stator, comprising a drive motor for driving the grinding head to rotate, the drive motor being disposed inside a housing (1), the drive motor comprising a stator (2) that slides with the housing (1), characterized in that, On both sides of the outer periphery of the stator (2), a strip-shaped groove (3) is provided along the sliding direction of the stator (2); The housing (1) has a through hole (4) at at least one position corresponding to the strip groove (3) leading to the corresponding strip groove (3); The through hole (4) is provided with an internal thread, and a bolt (5) is provided at the through hole (4). The bolt (5) is threadedly connected to the housing (1) through the internal thread. A compression spring (6) is provided below the bolt (5), a ball cup (7) is provided below the compression spring (6), and a top ball (8) is provided below the ball cup (7); Bolt (5) presses against spring (6) so that top ball (8) faces the groove (3); The top of the top bead (8) rotates and engages with the ball bowl (7), and the bottom of the top bead (8) protrudes from the through hole (4) and rolls and engages with the strip groove (3).

2. The elastic damping and locking mechanism for facilitating the sliding of the motor stator according to claim 1, characterized in that, The housing (1) is provided with at least two opposite through holes (4) corresponding to the two opposite strip grooves (3); The through hole (4) is provided with an internal thread, and a bolt (5) is provided at the through hole (4). The bolt (5) is threadedly connected to the housing (1) through the internal thread. A compression spring (6) is provided below the bolt (5), a ball cup (7) is provided below the compression spring (6), and a top ball (8) is provided below the ball cup (7); Bolt (5) presses against spring (6) so that top ball (8) faces the groove (3); The top of the top bead (8) rotates and engages with the ball bowl (7), and the bottom of the top bead (8) protrudes from the through hole (4) and rolls and engages with the strip groove (3).

3. The elastic damping and locking mechanism for facilitating the sliding of the motor stator according to claim 1, characterized in that, The inner wall of the through hole (4) near the top bead (8) is provided with an inwardly constricted annular opening (9), the diameter of which is smaller than the diameter of the top bead (8).

4. The elastic damping and locking mechanism for facilitating the sliding of the motor stator according to claim 1, characterized in that, A bellows (10) is fixedly connected to the outer periphery of the stator (2), and the other end of the bellows (10) is fixed to the housing (1). The bellows (10) seals the gap between the stator (2) and the housing (1).

5. The elastic damping and locking mechanism for facilitating the sliding of the motor stator according to claim 1, characterized in that, A damping membrane is provided on the outer periphery of the stator (2), in the area other than the strip groove (3).

6. The elastic damping and locking mechanism for facilitating the sliding of the motor stator according to claim 1, characterized in that, There is a gap between the stator (2) and the inner wall of the housing (1) that allows the stator (2) and the housing (1) to slide relative to each other. On the opposite sides of the outer periphery of the stator (2) where the strip groove (3) is provided, the sum of the radius differences between the stator (2) and the inner wall of the housing (1) is less than 0.2 mm and greater than 0.05 mm.

7. The elastic damping and locking mechanism for facilitating the sliding of the motor stator according to claim 1, characterized in that, The cross-section of the strip groove (3) is V-shaped.

8. The elastic damping and locking mechanism for facilitating the sliding of the motor stator according to claim 1, characterized in that, The through hole (4) includes an upper hole section with internal threads and a lower hole section with a smooth inner wall. The bolt (5) is threaded to the upper hole section, and the ball cup (7), the compression spring (6), and the top ball (8) are disposed in the lower hole section.

9. The elastic damping and locking mechanism for facilitating the sliding of the motor stator according to claim 1, characterized in that, The compression spring (6) is a wave spring.

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