An eccentric swing type polishing head and a linkage control method thereof

Abstract

The application discloses an eccentric swing type polishing grinding head and a linkage control method thereof. The polishing grinding head comprises a grinding disc, a rotating frame, a plurality of worm gear assemblies and a linkage polishing assembly. The grinding disc is fixed with a grinding disc upper cover. A worm passes through the upper cover and is fixed to a waterproof fixed cover. A grinding head shaft passes through the worm and drives the grinding disc to rotate through a shaft coupling assembly. During work, a motor drives the grinding disc to drive the rotating frame and the worm gear assemblies to revolve around the stationary worm. The worm gears mesh with the worm to rotate in the revolution. The rotation is converted into reciprocating swing through an eccentric wheel and a linkage rotating shaft. The eccentric wheel drives a driving swing shaft and a driven swing shaft. The grinding block seat swings continuously while revolving to form a compound motion track. The application eliminates concentric circular lines through the compound motion of revolution superimposed with swing, improves polishing uniformity and glossiness, reduces grinding resistance to realize power saving. The fully-closed sealing structure prolongs the service life of the transmission parts, has the characteristics of high efficiency, energy saving and durability, and is suitable for fine polishing of hard and brittle materials.

Description

Technical Field

[0001] This invention relates to the field of polishing technology, specifically to an eccentric oscillating polishing head and its linkage control method. Background Technology

[0002] In the polishing of hard and brittle materials such as stone, ceramics, and glass, the polishing head is the core component that determines surface quality and processing efficiency. Currently, traditional polishing heads mainly use the rotation of the grinding disc to drive the grinding block seat to revolve around the center to grind and polish the workpiece surface. The contact trajectory between the grinding block and the workpiece is a single circular motion, which easily produces concentric circular scratches and spiral patterns on the workpiece surface, affecting the uniformity and gloss of polishing. At the same time, the grinding block always cuts into the workpiece surface at a fixed angle under the single revolution motion, resulting in high grinding resistance, leading to high motor energy consumption and increased processing costs.

[0003] In addition, during the operation of existing polishing grinding heads, the internal transmission mechanism (such as gears, bearings, etc.) of the grinding disc is in a state of high-speed operation and heavy load for a long time. External contaminants such as cooling water and dust can easily enter the interior of the grinding disc through the assembly gaps, causing corrosion of metal transmission parts and emulsification and deterioration of lubricating oil. This leads to a shortened grinding head life and an increased maintenance frequency, which seriously affects the continuity of production and equipment utilization.

[0004] To address the aforementioned issues, some existing solutions attempt to add an independent oscillating drive device to the grinding disc. However, this often requires an additional power source or a complex cam-linkage mechanism, resulting in a bulky and large grinding head structure that is difficult to arrange in limited spaces such as multi-head polishing machines. Furthermore, the additional drive components further exacerbate the difficulty of sealing and lubrication, leading to low reliability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an eccentric oscillating polishing head that can achieve a grinding block with superimposed oscillating motion on its revolution without the need for external additional power. This improves the polishing surface quality, reduces grinding resistance to save energy, and provides good sealing and protection performance. The invention also provides a corresponding linkage control method for this polishing head.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] An eccentric oscillating polishing head includes a grinding disc, a rotating frame installed inside the grinding disc, several worm gear assemblies distributed around the rotating frame and fixedly installed with the rotating frame, several linked polishing assemblies installed on the grinding disc and assembled with the worm gear assemblies, a grinding disc cover fixedly installed above the grinding disc, a hollow worm gear passing through the grinding disc cover and installed inside the rotating frame, a waterproof fixing cover placed above the grinding disc cover and assembled with the worm gear by a pin, a grinding head shaft passing through the waterproof fixing cover, the worm gear and the grinding disc in sequence, and a coupling assembly fixedly installed at the bottom of the grinding disc and fixedly assembled with the grinding head shaft.

[0008] Preferably, the grinding disc includes a grinding disc body, a boss integrally formed inside the grinding disc body for fixing and mounting the rotating frame by bolts, an upper groove opened inside the boss for receiving the worm gear, a vertical shaft hole opened in the middle of the boss and fitted with a bushing, and a number of horizontal shaft holes equidistantly distributed around the outside of the boss.

[0009] Furthermore, the grinding disc also includes a grinding disc through-shaft hole distributed around the grinding disc body and on the same central axis as the transverse shaft hole, and a grinding disc bearing seat fixedly installed on the outside of the grinding disc through-shaft hole by bolts;

[0010] Furthermore, the grinding disc also includes a coupling mounting groove located at the center of the bottom of the grinding disc body and communicating with the vertical shaft hole, as well as oil drain plugs arranged in a ring around the vertical shaft hole at the bottom of the grinding disc body.

[0011] Preferably, the periphery of the rotating frame is provided with several worm gear mounting seats for installing worm gear assemblies. The worm gear mounting seats have rectangular holes corresponding to the parts of the rotating frame. Deep groove ball bearing seats are fixedly installed at the upper and lower ends of the interior of the rotating frame, and two deep groove ball bearing seats are snapped into the upper and lower ends of the worm.

[0012] Preferably, the worm gear assembly includes a worm gear shaft with bearings, a worm gear mounted on the worm gear shaft by a key, an eccentric wheel fixedly mounted on one end of the worm gear shaft, an eccentric drive shaft fixedly mounted on the eccentric wheel, an eccentric linkage rod assembled with the eccentric drive shaft, and a linkage shaft with one end hinged to the eccentric linkage rod and the other end connected to the linkage polishing assembly.

[0013] Preferably, the linkage polishing assembly includes an active swing shaft inserted into the grinding disc, an active swing rod and a first grinding block seat fixedly mounted on the main swing shaft by a key, a sliding connecting ball mounted on the active swing rod, a passive swing rod connected to the sliding connecting ball, a passive swing shaft inserted into the grinding disc and assembled with the passive swing rod by a key, and a second grinding block seat fixedly mounted on the main swing shaft by a key.

[0014] Preferably, the number of worm gear assemblies and linkage polishing assemblies is the same.

[0015] Preferably, the waterproof fixing cover includes a fixing cover body that is fixedly installed with the polishing machine, and a worm gear fixing disc that is embedded below the fixing cover body and fixedly installed by bolts.

[0016] Preferably, a coupling seat is provided at the upper end of the grinding head shaft.

[0017] Preferably, the coupling assembly includes a fixed flange fixedly mounted to the grinding disc, a rigid coupling head integrally formed in the middle of the side of the fixed flange facing the grinding disc and assembled with the grinding head shaft, an inner groove formed on the other side of the fixed flange, a bushing disposed in the inner groove for locking the grinding head shaft, and a bottom cover covering the inner groove and assembled with the fixed flange by bolts.

[0018] This invention also provides a linkage control method for an eccentric oscillating polishing head, comprising the following steps:

[0019] S1: Secure the waterproof cover to the polishing machine body to keep the worm gear stationary; connect the grinding head shaft to the output end of the machine motor, the motor drives the grinding head shaft to rotate, and the grinding head shaft drives the grinding disc to rotate as a whole through the coupling assembly;

[0020] S2: The rotation of the grinding disc drives the rotating frame to rotate synchronously. Several worm gear assemblies installed around the rotating frame and several linkage polishing assemblies assembled in the grinding disc revolve together with the rotating frame around the axis of the worm.

[0021] S3: During the revolution of the worm gear assembly with the rotating frame, the worm gear remains engaged with the stationary worm. While the worm gear moves around the worm, it rotates around its own worm gear shaft. The rotation of the worm gear shaft drives the eccentric wheel fixedly installed at its end to perform eccentric rotational motion.

[0022] S4: The eccentric drive shaft on the eccentric wheel follows the eccentric wheel in a circular motion. The eccentric drive shaft drives the eccentric linkage rod, which in turn pushes the linkage shaft. The linkage shaft converts the eccentric rotational motion into a reciprocating push-pull motion and transmits it to the active swing rod.

[0023] S5: The active swing rod is driven by the push and pull of the linkage shaft to swing back and forth around the active swing shaft, which drives the first grinding block seat to swing synchronously; at the same time, the swing of the active swing rod is transmitted through the sliding connecting ball, driving the passive swing rod to swing back and forth accordingly, and the passive swing rod drives the second grinding block seat to swing synchronously through the passive swing shaft.

[0024] S6: While the first and second grinding block holders revolve at high speed with the grinding disc, they also continuously oscillate back and forth, causing the contact trajectory between the grinding block and the workpiece surface to change continuously, thereby achieving polishing and grinding of the workpiece.

[0025] This invention utilizes a differential transmission method involving a fixed worm gear and a worm wheel that revolves and rotates, combined with a dual-oscillating shaft linkage mechanism, to enable the grinding block to continuously oscillate back and forth while revolving at high speed with the grinding disc, achieving the following comprehensive beneficial effects:

[0026] 1. By combining the revolution of the grinding disc with the high-frequency reciprocating motion of the grinding block seat, the contact trajectory between the grinding block and the workpiece surface is staggered, avoiding the concentric circular scratches and spiral marks that are easily generated by traditional single circular motion, and achieving a more uniform and delicate polished surface. In addition, the grinding block seat continuously changes the cutting angle of the grinding block during the oscillation process, which can better fit the arc or edge transition area of ​​the workpiece surface, effectively avoiding over-cutting or under-polishing. It is especially suitable for fine polishing of complex curved surface workpieces such as stone, ceramics, and metal.

[0027] 2. The oscillating motion changes the contact mode between the grinding block and the workpiece from continuous frontal compression to a dynamic intermittent cutting mode of entry and exit, which greatly reduces the grinding resistance torque. In addition, the differential transmission method of fixed worm and worm wheel revolution and rotation is adopted, which has a short and direct power transmission chain and avoids the energy loss caused by multi-stage gear or belt transmission. At the same time, the sealing ring structure ensures that the lubricating oil does not leak and maintains the long-term low friction operation of the transmission pair.

[0028] 3. Sealing rings are installed at all dynamic and static joints, such as the grinding disc and grinding disc cover, worm gear, grinding head shaft, and coupling assembly, forming a fully enclosed protection system. This effectively prevents external dust and moisture from entering the grinding disc and avoids corrosion or wear of precision transmission components such as worm gear, worm shaft, and bearings. The internal lubricating oil is reliably locked by the sealing rings, preventing leakage and contamination of the workpiece. At the same time, it ensures that the rotating frame, worm gear assembly, etc., are in a long-term oil bath lubrication state, greatly reducing the frequency of manual oiling and extending the overhaul cycle.

[0029] 4. The worm gear assembly and the linkage polishing assembly are all built into the inside of the grinding disc body. The worm gear mounting base, the horizontal shaft hole, and the grinding disc through shaft hole are distributed in a ring at equal intervals along the outer side of the boss. The structure is highly integrated and the overall size is small. It is suitable for arrangement in limited spaces such as multi-head polishing machines and narrow-pitch polishing lines. The rotating frame, worm gear assembly, and linkage polishing assembly each form an independent module and are detachably connected by bolts, pins, etc., which facilitates quick replacement and maintenance of individual components without the need to disassemble the entire grinding disc. Attached Figure Description

[0030] Figure 1 This is a structural diagram of an eccentric oscillating polishing head according to the present invention;

[0031] Figure 2 for Figure 1 Bottom view;

[0032] Figure 3 for Figure 3 Exploded view;

[0033] Figure 4 for Figure 1 Structural diagram of the middle grinding disc;

[0034] Figure 5 for Figure 4 Bottom view;

[0035] Figure 6 for Figure 3 A schematic diagram of the assembly of the central rotating frame, worm gear assembly, and linkage polishing assembly;

[0036] Figure 7 for Figure 6 Bottom view;

[0037] Figure 8 for Figure 3 Structural diagram of the waterproof fixing cover for the worm gear assembly;

[0038] Figure 9 for Figure 3 Structural diagram of the intermediate grinding head shaft;

[0039] Figure 10 for Figure 3 Exploded view of the central coupling assembly;

[0040] Figure 11 for Figure 10 The bottom view. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0042] Example

[0043] See Figure 1-11 This invention discloses an eccentric oscillating polishing head, comprising a grinding disc 1, a rotating frame 2 installed inside the grinding disc 1, a plurality of worm gear assemblies 3 distributed around the rotating frame 2 and fixedly installed with the rotating frame 2, a plurality of linked polishing assemblies 4 installed on the grinding disc 1 and assembled with the worm gear assemblies 3, a grinding disc cover 5 fixedly installed above the grinding disc 1, a hollow worm 6 inserted into the rotating frame 2 through the grinding disc cover 5, a waterproof fixing cover 7 placed above the grinding disc cover 5 and assembled with the worm 6 by a pin, and a coupling assembly 9 that passes sequentially through the waterproof fixing cover 7, the worm 6 and the grinding head shaft 8 of the grinding disc 1 and is fixedly installed at the bottom of the grinding disc 1 and fixedly assembled with the grinding head shaft 8.

[0044] The overall layout, consisting of the worm gear 6 fixedly installed with the waterproof cover 7, the worm wheel assembly 3 fixedly installed with the rotating frame 2, and the linkage polishing assembly 4 assembled with the grinding disc 1, forms a differential transmission structure where the worm gear is stationary and the worm wheel assembly 3 rotates while driving the worm wheel 32 to rotate. This allows for the coordinated movement of multiple linkage polishing assemblies 4 without the need for an additional power source. The sealing rings at each assembly point form a fully enclosed protection, preventing external moisture from invading and corroding the rotating frame 2, worm wheel assembly 3, and linkage polishing assembly 4, while also preventing internal lubricant leakage and ensuring the long-term stable operation of the transmission system.

[0045] It should be further explained that when the grinding disc 1 is assembled with the grinding disc cover 5, worm gear 6, waterproof fixing cover 7, grinding head shaft 8 and coupling assembly 9, a sealing ring is provided. The sealing ring is used to prevent moisture from the outside air from entering the grinding disc 1 and causing corrosion to the rotating frame 2, worm gear assembly 3 and linkage polishing assembly 4. It can also prevent the lubricating oil inside the grinding disc 1 from leaking.

[0046] The grinding disc 1 includes a grinding disc body 11, a boss 12 integrally formed inside the grinding disc body 11 for fixing the rotating frame 2 with bolts, an upper groove 13 inside the boss 12 for receiving the worm gear 6, a vertical shaft hole 14 in the middle of the boss 12 and fitted with a bushing, and a plurality of horizontal shaft holes 15 equidistantly distributed around the outside of the boss 12; the grinding disc 1 also includes grinding disc through-shaft holes 16 distributed around the grinding disc body 11 and on the same central axis as the horizontal shaft holes 15, and a grinding disc bearing seat 17 fixedly installed on the outside of the grinding disc through-shaft holes 16 with bolts; the grinding disc 1 also includes a coupling mounting groove 18 in the middle of the bottom of the grinding disc body 11 and communicating with the vertical shaft hole 14, and an oil drain plug 19 provided at the bottom of the grinding disc body 11 and distributed in a ring around the vertical shaft hole 14.

[0047] Specifically, the boss 12 provides a stable mounting base for the rotating frame 2, and the upper groove 13 supports the worm gear 6 to ensure its axial positioning is accurate; the vertical shaft hole 14 is fitted with a bushing to reduce the rotational friction loss of the grinding head shaft 8; the horizontal shaft hole 15 is coaxially arranged with the grinding disc through shaft hole 16 to ensure the coaxiality of the installation of the active swing shaft 41 and the passive swing shaft 46 and avoid jamming; the grinding disc bearing seat 17 provides rotational support for the swing shaft and reduces swing resistance; the coupling mounting groove 18 provides embedded space for the coupling assembly 9, making the overall structure more compact; the drain plug 19 facilitates regular oil changes and improves maintenance convenience.

[0048] The rotating frame 2 has several worm gear mounting seats 21 around its periphery for mounting worm gear assemblies 3. The worm gear mounting seats 21 have rectangular holes 22 corresponding to the parts of the rotating frame 2. Deep groove ball bearing seats 23 are fixedly installed at the upper and lower ends inside the rotating frame 2. Two deep groove ball bearing seats 23 are snapped into the upper and lower ends of the worm 6. Specifically, the worm gear assembly 3 is fixedly installed on the worm gear mounting seats 21 and meshes with the worm 6. The lower end of the rotating frame 2 abuts against the boss 12 and is fixedly installed by bolts. The upper end of the rotating frame 2 abuts against the grinding disc cover 5. Therefore, the rotating frame 2 can rotate around the worm 6, so that the worm gear assembly 3 installed on the rotating frame 2 revolves around the worm 6, which can reduce the rotational friction torque and reduce energy consumption.

[0049] The worm gear assembly 3 includes a worm gear shaft 31 with bearings, a worm gear 32 mounted on the worm gear shaft 31 by a key, an eccentric wheel 33 fixedly mounted on one end of the worm gear shaft 31, an eccentric drive shaft 34 fixedly mounted on the eccentric wheel 33, an eccentric linkage rod 35 assembled with the eccentric drive shaft 34, and a linkage shaft 36 with one end hinged to the eccentric linkage rod 35 and the other end connected to the linkage polishing assembly 4.

[0050] It should be further explained that the meshing of the worm gear 32 and the worm 6 converts the revolution motion into the rotation motion of the worm gear shaft 31; the eccentric wheel 33 and the eccentric transmission shaft 34 convert the continuous rotation motion into eccentric oscillation; and the eccentric linkage rod 35 and the linkage shaft 36 convert the eccentric oscillation into the reciprocating push-pull motion of the active oscillating rod 42. The entire transmission chain requires no additional power source, achieving motion conversion solely through the revolution itself, resulting in a simple and reliable structure with high energy transfer efficiency.

[0051] The linkage polishing assembly 4 includes an active swing shaft 41 inserted into the grinding disc 1, an active swing rod 42 and a first grinding block seat 43 fixedly mounted on the main swing shaft 41 by a key, a sliding connecting ball 44 mounted on the active swing rod 42, a passive swing rod 45 connected to the sliding connecting ball 44, a passive swing shaft 46 assembled with the passive swing rod 45 by a key and inserted into the grinding disc 1, and a second grinding block seat 47 fixedly mounted on the main swing shaft 41 by a key. The passive swing rod 45 is provided with a sliding ball groove adapted to the sliding connecting ball 44, so that the passive swing rod 45 and the passive swing shaft 46 can be flexibly linked. The active swing shaft 41 and the passive swing shaft 46 both pass through the grinding disc bearing seat 17 and the grinding disc through-shaft hole 16 and are inserted into the transverse shaft hole 15. The grinding disc bearing seat 17 on the grinding disc body 11 is used to support the active swing shaft 41 or the passive swing shaft 46, while the active swing rod 42 is assembled with the linkage rotating shaft 36.

[0052] Specifically, the active swing rod 42 and the linkage shaft 36 are assembled to receive reciprocating push-pull power; the active swing shaft 41 drives the first grinding block seat 43 to swing, and at the same time, through the sliding connecting ball 44, it synchronously drives the passive swing rod 45 and the passive swing shaft 46, realizing that one power input drives the dual-axis linkage swing, so that the first grinding block seat 43 and the second grinding block seat 47 move synchronously and the motion trajectory is coordinated and consistent; compared with the method of driving each grinding block individually, this structure greatly reduces the number of transmission parts, reduces the failure rate, and ensures the synchronicity and consistency of the swing of multiple grinding blocks.

[0053] The number of worm gear assembly 3 and linkage polishing assembly 4 is the same. Specifically, the number of worm gear assembly 3 and linkage polishing assembly 4 includes, but is not limited to, 3. The number of worm gear assembly 3 and linkage polishing assembly 4 depends on the size of the polishing head and the usage requirements. Therefore, the adjustable number allows the polishing head to be flexibly configured according to the diameter of the grinding disc and specific polishing requirements. It is suitable for both small-diameter fine polishing and large-diameter high-efficiency coarse polishing, and has good versatility and scalability.

[0054] The waterproof fixing cover 7 includes a fixing cover body 71 fixedly installed with the polishing machine, and a worm gear fixing plate 72 embedded below the fixing cover body 71 and fixedly installed with bolts. Specifically, the worm gear fixing plate 72 is assembled with the worm 6 and positioned and fixed by a pin. In addition, the fixing cover body 71 is fixedly installed with the polishing machine body to achieve the suspension and positioning of the entire grinding head; the worm gear fixing plate 72 is positioned and fixed with the worm 6 by a pin, ensuring that the worm 6 remains stationary during the rotation of the grinding disc 1, providing a fixed meshing reference for the worm wheel 32. At the same time, the worm gear fixing plate 72 is embedded below the fixing cover body 71 and fixed with bolts, which facilitates disassembly and maintenance.

[0055] The upper end of the grinding head shaft 8 is provided with a connector 81. Specifically, the connector 81 enables the grinding head shaft 8 to be quickly connected to the standard output end of the general equipment motor without the need for a special adapter flange or a customized motor interface, which reduces the equipment matching cost and changeover time. It has good interchangeability and compatibility, and is convenient for quick changeover on different models of polishing machines.

[0056] The coupling assembly 9 includes a fixed flange 91 fixedly mounted to the grinding disc 1, a rigid coupling head 92 integrally formed in the middle of the side of the fixed flange 91 facing the grinding disc 1 and assembled with the grinding head shaft 8, an inner groove 93 formed on the other side of the fixed flange 91, a bushing 94 disposed in the inner groove 93 for locking the grinding head shaft 8, and a bottom cover 95 covering the inner groove 93 and assembled with the fixed flange 91 by bolts.

[0057] It should be further explained that the fixed flange 91 is fixedly installed with the grinding disc 1 to achieve power transmission; the rigid coupling head 92 is assembled with the grinding head shaft 8 to ensure alignment accuracy and transmission rigidity; the inner groove 93 and the bushing 94 lock the grinding head shaft 8 to prevent axial movement; the bottom cover 95 covers the inner groove 93 to form a closed space to prevent dust from entering the coupling part, and at the same time facilitates disassembly and maintenance; the overall coupling structure is compact, with high transmission rigidity, and can withstand large torque and impact loads during the polishing process.

[0058] In this embodiment, the present invention also provides a linkage control method for an eccentric oscillating polishing head, comprising the following steps:

[0059] S1: Fix the waterproof fixing cover 7 to the polishing machine body to keep the worm gear 6 stationary; connect the grinding head shaft 8 to the output end of the equipment motor, the motor drives the grinding head shaft 8 to rotate, and the grinding head shaft 8 drives the grinding disc 1 to rotate as a whole through the coupling assembly 9;

[0060] S2: The rotation of the grinding disc 1 drives the rotating frame 2 to rotate synchronously. Several worm gear assemblies 3 installed around the rotating frame 2 and several linkage polishing assemblies 4 assembled in the grinding disc 1 revolve together with the rotating frame 2 around the axis of the worm 6.

[0061] S3: During the revolution of the worm gear assembly 3 with the rotating frame 2, the worm gear 32 is engaged with the stationary worm 6. While the worm gear 32 is moving around the worm 6, it rotates around its own worm gear shaft 31. The rotation of the worm gear shaft 31 drives the eccentric wheel 33 fixedly installed at its end to perform eccentric rotational motion.

[0062] S4: The eccentric drive shaft 34 on the eccentric wheel 33 follows the eccentric wheel in a circular motion. The eccentric drive shaft 34 drives the eccentric linkage rod 35, which in turn pushes the linkage shaft 36. The linkage shaft 36 converts the eccentric rotational motion into a reciprocating push-pull motion and transmits it to the active swing rod 42.

[0063] S5: The active swing rod 42 is driven by the push and pull of the linkage shaft 36 to swing back and forth around the active swing shaft 41. The active swing shaft 41 drives the first grinding block seat 43 to swing synchronously. At the same time, the swing of the active swing rod 42 is transmitted through the sliding connecting ball 44, driving the passive swing rod 45 to swing back and forth accordingly. The passive swing rod 45 drives the second grinding block seat 47 to swing synchronously through the passive swing shaft 46.

[0064] S6: While the first grinding block holder 43 and the second grinding block holder 47 revolve at high speed with the grinding disc 1, they continuously oscillate back and forth, so that the contact trajectory between the grinding block and the workpiece surface changes continuously, thereby achieving polishing and grinding of the workpiece.

[0065] It should be further explained that the complete process from S1 to S6 clearly defines the complete control logic from power input → revolution → worm gear rotation → eccentric conversion → dual-axis oscillation → composite polishing motion; in S3, the worm gear 32 meshes with the stationary worm 6 to achieve rotation, and the revolution energy is reused to drive the oscillation; in S5, the sliding connecting ball 44 realizes dual-axis linkage, ensuring that the first grinding block seat 43 and the second grinding block seat 47 oscillate synchronously and coordinate their movements; in S6, the grinding block seat superimposes reciprocating oscillation on the basis of revolution to form a composite motion trajectory, eliminating the concentric circle scratches that are easily generated by traditional single revolution, and at the same time, the change in "cutting angle" generated by oscillation can effectively reduce grinding resistance, thereby reducing motor power consumption and improving polishing efficiency and surface quality.

[0066] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention. The implementation of the present invention is not limited thereto. All other modifications, substitutions or alterations made to the above structure of the present invention based on the above content of the present invention, in accordance with ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​the present invention, shall fall within the scope of protection of the present invention.

Claims

1. An eccentric oscillating polishing head, characterized in that, The assembly includes a grinding disc (1), a rotating frame (2) installed inside the grinding disc (1), several worm gear assemblies (3) distributed around the rotating frame (2) and fixedly installed with the rotating frame (2), several linkage polishing assemblies (4) installed on the grinding disc (1) and assembled with the worm gear assemblies (3), a grinding disc cover (5) fixedly installed above the grinding disc (1), a hollow worm (6) inserted into the rotating frame (2) through the grinding disc cover (5), a waterproof fixing cover (7) placed above the grinding disc cover (5) and assembled with the worm (6) by a pin, and a coupling assembly (9) fixedly installed at the bottom of the grinding disc (1) and fixedly assembled with the grinding head shaft (8) through the waterproof fixing cover (7), the worm (6) and the grinding head shaft (8) of the grinding disc (1) in sequence.

2. The eccentric oscillating polishing head according to claim 1, characterized in that, The grinding disc (1) includes a grinding disc body (11), a boss (12) integrally formed inside the grinding disc body (11) and fixedly mounted on the rotating frame (2) by bolts, an upper groove (13) opened inside the boss (12) for receiving the worm (6), a vertical shaft hole (14) opened in the middle of the boss (12) and fitted with a bushing, and several horizontal shaft holes (15) evenly distributed around the outside of the boss (12). The grinding disc (1) also includes a grinding disc through-shaft hole (16) distributed around the grinding disc body (11) and on the same central axis as the horizontal shaft hole (15), and a grinding disc bearing seat (17) fixedly installed on the outside of the grinding disc through-shaft hole (16) by bolts. The grinding disc (1) also includes a coupling mounting groove (18) located at the center of the bottom of the grinding disc body (11) and communicating with the vertical shaft hole (14), and an oil drain screw plunger (19) located at the bottom of the grinding disc body (11) and distributed in a ring around the vertical shaft hole (14).

3. The eccentric oscillating polishing head according to claim 1, characterized in that, The rotating frame (2) is provided with several worm gear mounting seats (21) for mounting the worm gear assembly (3). The worm gear mounting seats (21) are provided with rectangular holes (22) corresponding to the parts of the rotating frame (2). Deep groove ball bearing seats (23) are fixedly installed at the upper and lower ends of the rotating frame (2). Two deep groove ball bearing seats (23) are clamped at the upper and lower ends of the worm (6).

4. The eccentric oscillating polishing head according to claim 1, characterized in that, The worm gear assembly (3) includes a worm gear shaft (31) with bearings, a worm gear (32) mounted on the worm gear shaft (31) by a key, an eccentric wheel (33) fixedly mounted on one end of the worm gear shaft (31), an eccentric drive shaft (34) fixedly mounted on the eccentric wheel (33), an eccentric linkage rod (35) assembled with the eccentric drive shaft (34), and a linkage shaft (36) with one end hinged to the eccentric linkage rod (35) and the other end connected to the linkage polishing assembly (4).

5. The eccentric oscillating polishing head according to claim 1, characterized in that, The linkage polishing assembly (4) includes an active swing shaft (41) inserted on the grinding disc (1), an active swing rod (42) and a first grinding block seat (43) fixedly mounted on the main swing shaft (41) by a key, a sliding connecting ball (44) mounted on the active swing rod (42), a passive swing rod (45) connected to the sliding connecting ball (44), a passive swing shaft (46) assembled with the passive swing rod (45) by a key and inserted on the grinding disc (1), and a second grinding block seat (47) fixedly mounted on the main swing shaft (41) by a key.

6. The eccentric oscillating polishing head according to claim 1, characterized in that, The number of worm gear assembly (3) and linkage polishing assembly (4) is the same.

7. The eccentric oscillating polishing head according to claim 1, characterized in that, The waterproof fixing cover (7) includes a fixing cover body (71) fixedly installed with the polishing machine, and a worm gear fixing plate (72) embedded under the fixing cover body (71) and fixedly installed by bolts.

8. The eccentric oscillating polishing head according to claim 1, characterized in that, A coupling seat (81) is provided at the upper end of the grinding head shaft (8).

9. The eccentric oscillating polishing head according to claim 1, characterized in that, The coupling assembly (9) includes a fixed flange (91) fixedly mounted to the grinding disc (1), a rigid coupling head (92) integrally formed in the middle of the side of the fixed flange (91) facing the grinding disc (1) and assembled with the grinding head shaft (8), an inner groove (93) opened on the other side of the fixed flange (91), a bushing (94) disposed in the inner groove (93) for locking the grinding head shaft (8), and a bottom cover (95) covering the inner groove (93) and assembled with the fixed flange (91) by bolts.

10. A linkage control method using an eccentric oscillating polishing head as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Fix the waterproof fixing cover (7) to the polishing machine body to keep the worm gear (6) stationary; connect the grinding head shaft (8) to the output end of the equipment motor, the motor drives the grinding head shaft (8) to rotate, and the grinding head shaft (8) drives the grinding disc (1) to rotate as a whole through the coupling assembly (9); S2: The rotation of the grinding disc (1) drives the rotating frame (2) to rotate synchronously. Several worm gear assemblies (3) installed around the rotating frame (2) and several linkage polishing assemblies (4) assembled in the grinding disc (1) revolve together with the rotating frame (2) around the axis of the worm (6). S3: During the revolution of the worm gear assembly (3) with the rotating frame (2), the worm gear (32) maintains meshing with the stationary worm (6). While the worm gear (32) moves around the worm (6), it rotates around its own worm gear shaft (31). The rotation of the worm gear shaft (31) drives the eccentric wheel (33) fixedly installed at its end to perform eccentric rotational motion. S4: The eccentric drive shaft (34) on the eccentric wheel (33) follows the eccentric wheel to make a circular trajectory. The eccentric drive shaft (34) drives the eccentric linkage rod (35), the eccentric linkage rod (35) pushes the linkage shaft (36), and the linkage shaft (36) converts the eccentric rotational motion into a reciprocating push-pull motion and transmits it to the active swing rod (42). S5: The active swing rod (42) is driven by the push and pull of the linkage shaft (36) to swing back and forth around the active swing shaft (41). The active swing shaft (41) drives the first grinding block seat (43) to swing synchronously. At the same time, the swing of the active swing rod (42) is transmitted through the sliding connecting ball (44) to drive the passive swing rod (45) to swing back and forth accordingly. The passive swing rod (45) drives the second grinding block seat (47) to swing synchronously through the passive swing shaft (46). S6: The first grinding block holder (43) and the second grinding block holder (47) revolve at high speed with the grinding disc (1) while continuously oscillating back and forth, so that the contact trajectory between the grinding block and the workpiece surface changes continuously, thereby achieving polishing and grinding of the workpiece.

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