A polishing device

Abstract

This utility model discloses a polishing device with good operational stability, low wear of the positioning structure, and high positioning accuracy. It includes a base, a lower plate assembly, an upper plate assembly, and a safety hook assembly. The base is equipped with a mounting bracket. The lower plate assembly includes a lower grinding disc and a first drive motor housed within the base and driving the lower grinding disc to rotate. A grinding zone is formed on the upper surface of the lower grinding disc. The upper plate assembly includes a telescopic drive component mounted on the mounting bracket, a connecting plate driven to the telescopic end of the telescopic drive component, a tension / compression sensor electrically connected to the telescopic drive component, a mounting plate fixedly connected to the lower part of the connecting plate, a displacement sensor fixed to the lower surface of the connecting plate and electrically connected to the first drive motor, and an upper grinding disc fixed to the lower surface of the mounting plate. A detection hole is provided on the mounting plate. The safety hook assembly includes two hook mechanisms symmetrically arranged on both sides of the telescopic drive component. Each hook mechanism includes a drive mechanism and a hook driven to the drive mechanism and having a support arm at its bottom.

Description

Technical Field

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

[0002] Polishing plays an irreplaceable role in many high-end manufacturing industries. For example, in the chip manufacturing industry, the linewidth of circuits on chips is constantly shrinking to the nanometer level of precision. Therefore, polishing is needed to control the surface roughness of chips to the atomic level to meet the requirements of subsequent photolithography, etching, and other precise processes. In the field of precision optics, products such as high-end camera lenses, telescope lenses, lithography machine lenses, mobile phone cover plates, watch cases, and VR glasses require polishing to reduce the surface roughness of lenses to the nanometer level. This reduces light propagation loss between lenses, improving observation accuracy and resolution. In the aerospace field, polishing is required for aircraft engine blades, wing structures, etc., to reduce air resistance, improve fuel efficiency and flight performance, eliminate microscopic surface defects, and enhance the fatigue strength and corrosion resistance of parts. In the medical device field, polished medical device surfaces are smoother, effectively reducing bacterial adhesion and inflammatory reactions, improving the compatibility of implants with human tissues, reducing the risk of postoperative infection, and extending the lifespan of implants.

[0003] Currently, polishing equipment on the market is mainly suitable for non-precision parts. When applied to precision parts requiring high-precision polishing, the equipment is prone to shaking or vibration due to its mechanical structure and manufacturing precision. This poor operational stability affects the polishing accuracy of the product and shortens the equipment's lifespan. Furthermore, the mechanical positioning devices on polishing equipment are prone to wear after long-term use, resulting in inaccurate positioning of the workpiece between the upper and lower polishing discs. Consequently, it is difficult to guarantee the dimensional accuracy of the polished workpiece, such as thickness and flatness. Utility Model Content

[0004] Therefore, it is necessary to provide a polishing device with good operational stability, low wear on the positioning structure, and high positioning accuracy to address the above-mentioned shortcomings.

[0005] A polishing apparatus, comprising:

[0006] The base has a drive chamber inside and a mounting bracket fixedly connected to the base on its upper part.

[0007] The lower grinding plate assembly includes a lower grinding plate rotatably mounted on a base, a first drive motor housed in a drive chamber and driving the lower grinding plate to rotate in a horizontal plane, the lower grinding plate extending from the upper surface of the base, and the upper surface of the lower grinding plate forming a grinding area for receiving products.

[0008] The upper plate assembly includes a telescopic drive component mounted on a mounting bracket, a connecting plate located below the telescopic drive component and drivenly connected to the telescopic end of the telescopic drive component, a tension / compression sensor located between the telescopic end and the connecting plate and electrically connected to the telescopic drive component, a mounting plate located below the connecting plate and fixedly connected to the connecting plate, a displacement sensor fixed to the lower surface of the connecting plate and electrically connected to the first drive motor, and an upper grinding disc with an annular structure fixed to the lower surface of the mounting plate and used for receiving grinding fluid. The upper grinding disc corresponds to the grinding area, and the mounting plate has detection holes corresponding to the displacement sensor and the grinding area.

[0009] A safety hook assembly includes two hook mechanisms symmetrically arranged on both sides of a telescopic drive member. Each hook mechanism includes a drive mechanism fixed on a mounting bracket and electrically connected to the telescopic drive member, and a hook driven by the drive mechanism. The bottom end of each hook is provided with a support arm. The hook moves under the drive of the drive mechanism to allow the support arm to support or move away from the upper grinding disc.

[0010] In one embodiment, the lower grinding plate assembly further includes a grinding disc support and a water shroud. The grinding disc support is fixedly connected to the base, and the lower grinding disc is rotatably mounted on the grinding disc support. The upper surface of the grinding disc support is provided with a wastewater tank for receiving grinding waste liquid, and the bottom of the grinding disc support is equipped with a wastewater interface that communicates with the wastewater tank and an external wastewater pipe. The water shroud surrounds the lower grinding disc and is fixedly connected to the grinding disc support. An annular liquid guiding area communicating with the wastewater tank is formed between the inner surface of the water shroud and the annular side surface of the lower grinding disc.

[0011] In one embodiment, the lower grinding disc is an annular grinding disc driven and connected to a first drive motor, the grinding disc support is an annular structure, and the lower disc assembly further includes an outer gear ring located inside the grinding disc support and rotatably arranged around the outer side of the lower grinding disc, an inner gear ring rotatably arranged in the inner region of the lower grinding disc ring, a plurality of outer toothed pins arranged annularly along the upper surface of the outer gear ring, a plurality of inner toothed pins arranged annularly along the upper surface of the inner gear ring, and an inner ring sleeve rotatably arranged in the inner region of the inner gear ring and detachably connected to the upper grinding disc to drive the upper grinding disc to rotate. The plurality of outer toothed pins, the plurality of inner toothed pins, and the upper surface of the lower grinding disc together form the grinding area in which a plurality of glass carriers can be arranged annularly.

[0012] In one embodiment, a plurality of grinding fluid connectors are distributed on the upper surface of the upper grinding disc, and a guide groove communicating with each grinding fluid connector is provided in the upper grinding disc. A diversion groove communicating with the guide groove is provided on the lower surface of the upper grinding disc and is used to guide the grinding fluid to various parts of the grinding area.

[0013] In one embodiment, the upper surface of the connecting plate is fixed with a ring-shaped water receiving tank for receiving grinding fluid. The bottom of the water receiving tank has several liquid delivery holes. The connecting plate has several through holes that correspond to and communicate with each liquid delivery hole. The lower surface of the connecting plate is fixed with a liquid guiding connector at each through hole. Each liquid guiding connector is connected to each grinding fluid connector through a pipe. The mounting plate is fixedly connected to the connecting plate by a plurality of connecting posts arranged in a ring in the horizontal plane. The mounting plate is connected to the upper grinding disc with screws.

[0014] In one embodiment, the upper plate assembly further includes a bearing fixed to the upper surface of the connecting plate and located in the area within the water receiving groove ring, a bearing housing cover rotatably mounted on the bearing and vertically engaging with the bearing, and a support plate fixed to the upper surface of the bearing housing cover. The top of the tension / compression sensor is fixedly connected to the mounting bracket, the bottom of the tension / compression sensor is fixedly connected to the middle of the support plate, the telescopic end of the telescopic drive is connected to the support plate, a guide block is provided on the side of the mounting bracket, and a guide shaft that slides through the guide block is fixed on the support plate.

[0015] In one embodiment, the hook includes two cantilever arms that are arranged opposite each other and both extend vertically, a support arm fixed to the bottom end of the two cantilever arms and located on the side of the cantilever arm adjacent to the upper grinding disc, a connecting arm connecting the two support arms, and a connecting shaft fixedly connected to the top end of the two cantilever arms; the cantilever arm includes a first arm fixedly connected to the connecting shaft, a second arm located at the lower end of the first arm and fixedly connected to the support arm, a first toothed portion on the side of the first arm facing away from the other first arm, a second toothed portion on the second arm corresponding to and meshing with the first toothed portion, a limiting hole extending vertically in the area where the first toothed portion is located on the first arm, and an adjusting through hole extending vertically in the area where the second toothed portion is located on the second arm, and the first arm is fixedly connected to the second arm by a screw passing through the limiting hole and inserted into the adjusting through hole.

[0016] In one embodiment, the driving mechanism is a dual-head motor, and the connecting shaft includes two spaced-apart shaft segments, each shaft segment being connected to a first arm and an output shaft of the dual-head motor. The hook rotates in a vertical plane under the drive of the driving mechanism; or the driving mechanism is a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder, and the piston rod of the driving mechanism is drivenly connected to the connecting shaft to push the hook to move in the horizontal direction.

[0017] In one embodiment, the polishing apparatus further includes a safety pin fixed to a mounting bracket, the safety pin having a telescopic limiting portion that can extend to restrict rotation of the upper grinding disc.

[0018] In one embodiment, an electrical control box is mounted on the outer wall of the base, and a control panel electrically connected to the electrical control box is provided on the mounting bracket.

[0019] The polishing device of this invention incorporates a tension / compression sensor between the telescopic drive component and the connecting plate. During the polishing process, the tension / compression sensor continuously monitors the pressure value of the processing section, allowing the telescopic drive component to adjust the height of the upper grinding disc to compensate for the pressure in the processing section. This ensures stable pressure during polishing, improves the stability of the equipment, enhances polishing accuracy, and extends the equipment's service life. A displacement sensor is installed on the lower surface of the mounting plate to continuously monitor the grinding amount. When the preset grinding amount is reached, the first drive motor receives the signal from the displacement sensor and stops. This prevents wear on the product positioning structure (carrier) caused by excessive grinding, ensuring the positioning accuracy of the product and thus improving the product's processing precision. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the polishing device in one embodiment of the present invention;

[0021] Figure 2 This is a front view of the polishing device in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the base structure in one embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the polishing drive assembly in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the mandrel assembly in one embodiment of the present invention;

[0025] Figure 6 This is a cross-sectional structural diagram of the mandrel assembly in one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the lower plate assembly in one embodiment of the present invention;

[0027] Figure 8 This is a front view of the lower plate assembly in one embodiment of the present invention;

[0028] Figure 9 This is a bottom view of the lower plate assembly in one embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the upper plate assembly after the telescopic drive component has been removed in one embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of the hook mechanism in one embodiment of the present invention. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0032] Please combine Figure 1-11This utility model discloses a polishing device 10 with good operational stability, low wear of the positioning structure, and high positioning accuracy. The polishing device 10 includes a base 100, a lower plate assembly 200, an upper plate assembly 300, and a safety hook assembly 400. The base 100 supports the other components and provides a polishing area. The base 100 has a drive chamber 110, which houses a polishing drive assembly 500 that provides power for polishing and grinding the product, and a spindle assembly 600 connected to the polishing drive assembly 500. A mounting bracket 120 is fixedly connected to the base 100 above it, providing mounting positions for the upper plate assembly 300 and the safety hook assembly 400, allowing them to be suspended above the base 100. The lower grinding disc assembly 200 includes a lower grinding disc 210 rotatably mounted on the base 100 and a first drive motor 510 housed within the drive chamber 110 and driving the lower grinding disc 210 to rotate in a horizontal plane. The first drive motor 510 also constitutes part of the polishing drive assembly 500. The lower grinding disc 210 extends from the upper surface of the base 100, and the upper surface of the lower grinding disc 210 has a grinding area for receiving products. In this embodiment, at least a portion of the lower grinding disc 210 extends beyond the upper surface of the base 100 to allow polishing and grinding operations to be performed above the base 100, thereby reducing the difficulty of picking up and placing products. The upper plate assembly 300 includes a telescopic drive member 310 mounted on a mounting bracket 120, a connecting plate 320 located below the telescopic drive member 310 and drivenly connected to the telescopic end of the telescopic drive member 310, a tension / compression sensor 330 located between the telescopic end and the connecting plate 320 and electrically connected to the telescopic drive member 310, a mounting plate 340 located below the connecting plate 320 and fixedly connected to the connecting plate 320, a displacement sensor 350 fixed to the lower surface of the connecting plate 320 and electrically connected to the first drive motor 510, and an annular upper grinding disc 360 fixed to the lower surface of the mounting plate 340 for receiving grinding fluid. The upper grinding disc 360 corresponds to the grinding area. The mounting plate 340 has detection holes corresponding to the displacement sensor 350 and the grinding area. The safety hook assembly 400 includes two hook mechanisms 410 symmetrically arranged on both sides of the telescopic drive member 310. The hook mechanism 410 includes a drive mechanism 411 fixed to the mounting bracket 120 and electrically connected to the telescopic drive member 310. Figure 11 The safety hook assembly 400 is encapsulated within the housing and is driven by the drive mechanism 411. The bottom end of the hook has a support arm 412. The hook moves under the drive of the drive mechanism 411, causing the support arm 412 to support or move away from the upper grinding disc 360. The safety hook assembly 400 is used to support the upper grinding disc 360 during the process of loading the product into the grinding area or removing the product from the grinding area, to prevent the upper grinding disc 360 from suddenly falling and causing a safety accident, thus ensuring the normal operation of product handling.

[0033] In this embodiment, the telescopic drive member 310 is arranged vertically. The connecting plate 320, the mounting plate 340, and the upper grinding disc 360 together form a movable limiting mechanism for limiting the upper part of the product. The telescopic drive member 310 provides the power for the movable limiting mechanism to move up and down in the vertical direction, so that the upper grinding disc 360 descends and continuously squeezes and limits the product during the polishing process, or so that the upper grinding disc 360 rises and releases the product from the limit, so as to remove the polished product or put in a new product to be polished. The telescopic drive member 310 can be a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder. It can also include a motor, a lead screw connected to the motor output shaft, and a lead screw nut sleeved on the lead screw and threaded with the lead screw. The rotation of the motor output shaft drives the lead screw to rotate, thereby causing the lead screw nut to move along the axial direction of the lead screw. The lead screw nut is connected to the connecting plate 320 to provide the telescopic end of the telescopic drive member 310, thereby further driving the above-mentioned movable limiting mechanism to move up and down.

[0034] It should be noted that in this embodiment, one end of the tension / compression sensor 330 is fixed to the mounting bracket 120, and the other end is mounted on the movable limiting mechanism. Thus, during the lifting and lowering of the movable limiting mechanism, the end of the tension / compression sensor 330 connected to the movable limiting mechanism will be subjected to tension or pressure. When the upper grinding disc 360 contacts and compresses the product, the pressure between the product and the upper grinding disc 360 is converted into tension on the tension / compression sensor 330. The tension / compression sensor 330 further converts this tension into a measurable electrical signal, thereby detecting the pressure value of the product polishing section. Since the tension / compression sensor 330 is electrically connected to the telescopic drive component 310, the telescopic drive component 310 can adjust the extension of its telescopic end in real time according to the pressure value detected by the tension / compression sensor 330, thereby adjusting the height of the upper grinding disc 360 to achieve feedback adjustment of the pressure value of the processing section.

[0035] The displacement sensor 350 detects the thickness of the product within the grinding zone to measure the amount of grinding, thereby controlling the polishing amount and preventing damage to the carrier used for product positioning, ensuring the reliability of the carrier's product positioning. In this embodiment, the displacement sensor 350 is a contact displacement sensor, which measures the surface position, displacement, or thickness change of the object through direct contact between a probe (or stylus) and the object being measured. Specifically, during the object's movement (thickness change), the probe moves synchronously, causing a change in the physical quantities inside the contact displacement sensor, which in turn changes the electrical signal of the contact displacement sensor, thus achieving the purpose of detecting changes in the object's thickness. The contact displacement sensor in this embodiment can be any commercially available contact displacement sensor with a size that meets the installation requirements of the polishing machine. For example, it can be a potentiometer-type (resistive) displacement sensor or a linear variable differential transformer. Its working principle is existing technology and will not be described in detail here. By using a contact displacement sensor to detect the grinding amount of the product, before the polishing operation, only the preload (or wire feed) of the contact displacement sensor needs to be set. When the polishing amount (or product thickness) of the product reaches the preset value, the contact displacement sensor sends a signal to the first drive motor 510 to stop the first drive motor 510 and end the polishing operation to avoid damage to the carrier.

[0036] Please combine Figure 1-3 In this embodiment, the base 100 includes a bracket 130 and side plates 140, a bottom plate 150, and a top plate 160 mounted on the bracket 130 by screws or welding. The bracket 130, top plate 160, side plates 140, and bottom plate 150 together form a drive chamber 110. The bracket 130 is made of cast iron, and the upper part of the bracket 130 and the mounting bracket 120 are made of high-quality gray cast iron to improve the vibration resistance and stability of the polishing device 10. The base 100 has a hollow cuboid or cube structure. The bottom of the bracket is provided with multiple support feet 170 to raise the height of the base 100 and prevent water from the factory from entering the drive chamber 110. The side plates 140 have multiple mounting holes 141, and a heat sink 142 can be detachably installed at each mounting hole. The heat sink 142 has several heat dissipation holes to dissipate heat from the drive chamber 110 in a timely manner and prevent the equipment from overheating and being damaged. A circular through hole 161 is provided in the center of the top plate 160, which serves as a passage for the lower grinding disc 210. The mounting bracket 120 includes two uprights 121 arranged opposite each other on both sides of the circular through hole 161 and a crossbar 122 fixedly connected to the top of the two uprights 121. In other words, the mounting bracket 120 has an n-shaped structure. In other embodiments, the base 100 may also have other hollow prism structures, cylindrical structures, or other irregular structures.

[0037] Please combine Figure 1-9The lower assembly 200 also includes a grinding disc support 220 and a water shroud 230. The grinding disc support 220 is fixedly connected to the base 100 and has an annular structure. The lower grinding disc 210 is rotatably mounted on the grinding disc support 220. The upper surface of the grinding disc support 220 is provided with a wastewater tank for receiving grinding waste liquid. The grinding disc support 220 can be understood as an annular structure with a U-shaped cross-section to receive grinding waste liquid generated during polishing operations. The bottom of the grinding disc support 220 is equipped with a wastewater interface 221 that connects to the wastewater tank and an external wastewater pipe to discharge the grinding waste liquid and facilitate subsequent centralized treatment. The water shroud 230 surrounds the lower grinding disc 210 and is fixedly connected to the grinding disc support 220. The inner surface of the water shroud 230 and the annular side surface of the lower grinding disc 210 form an annular liquid guiding area 240 that communicates with the wastewater tank. Preferably, in this embodiment, the water cover 230 is snap-fitted or screwed to the grinding disc support 220 to prevent grinding waste liquid generated during polishing from splashing outwards, thereby reducing the cleaning difficulty of the polishing device 10. When cleaning the equipment, the water cover 230 is removed, and cleaning water is used to directly rinse the waste liquid into the grinding disc support 220 and drain it through the wastewater inlet 221. Eight claws 231 are distributed in a ring around the edge of the water cover 230. When the water cover 230 and the grinding disc support 220 are assembled, the claws 231 abut against the outer surface of the grinding disc support 220 to position the water cover 230. In this embodiment, the grinding disc support 220, claws 231, water cover 230, and other components in contact with the grinding fluid are all treated with anti-rust and anti-sticking measures, or have a stainless steel layer on their surfaces to reduce the adhesion of grinding fluid and reduce grinding powder agglomeration, thereby effectively reducing the proportion of glass scratches and improving equipment cleaning efficiency.

[0038] In one embodiment, the lower grinding disc 210 is an annular grinding disc that is driven and connected to the first drive motor 510. The lower disc assembly 200 also includes an outer gear ring 250 located inside the grinding disc support 220 and rotatably arranged around the outer side of the lower grinding disc 210, an inner gear ring 260 rotatably arranged in the inner region of the lower grinding disc 210, a plurality of outer toothed pins 251 arranged in annularly along the upper surface of the outer gear ring 250, a plurality of inner toothed pins 261 arranged in annularly along the upper surface of the inner gear ring 260, and an inner ring sleeve 270 rotatably arranged in the inner region of the inner gear ring 260 and detachably connected to the upper grinding disc 360 to drive the upper grinding disc 360 to rotate. The plurality of outer toothed pins 251, the plurality of inner toothed pins 261 and the upper surface of the lower grinding disc 210 together form a grinding area in which a plurality of glass carriers can be arranged in annularly. Thus, when the carrier carrying the product is arranged in a ring within the grinding area, during the polishing process, the carrier revolves around the center of the lower grinding disc 210 under the drive of the lower grinding disc 210. Simultaneously, by controlling the rotation of the outer gear ring 250 and the inner gear ring 260, the outer gear ring 250 and the inner gear ring 260 rotate in opposite directions, causing the carrier to rotate (i.e., rotate on its own axis) under the combined action of the outer gear pin 251 and the inner gear pin 261, ensuring uniform polishing of the product surface. In this embodiment, the inner ring 270 has a limiting groove 271 extending along the height direction of the inner ring 270 on its annular side, and the upper grinding disc 360 has a limiting protrusion that can be inserted into the limiting groove 271. Thus, when the upper grinding disc 360 descends to contact the product, the limiting protrusion engages with the limiting groove 271. In this way, by driving the inner ring 270 to rotate, the upper grinding disc 360 can be driven to rotate synchronously, thereby achieving double-sided polishing of the product. In this embodiment, the lower surface of the upper grinding disc is provided with a clearance groove or clearance hole for the inner ring 270 to be inserted, and a limiting protrusion is provided on the inner wall surface of the clearance groove or clearance hole.

[0039] Please combine further Figure 1-5The polishing drive assembly 500 and the spindle assembly 600 are housed in the drive chamber 110 of the base 100. The polishing drive assembly 500 provides power for the rotation of each component in the lower plate assembly 200, while the spindle assembly 600 provides a transmission mechanism between the polishing drive assembly 500 and the lower plate assembly 200 to change the transmission ratio between them. In this embodiment, the first drive motor 510 in the lower plate assembly 200 also constitutes part of the polishing drive assembly 500. The polishing drive assembly 500 also includes a second drive motor 520 for driving the inner ring 270 to rotate, a third drive motor 530 for driving the outer gear ring 250 to rotate, and a fourth drive motor 540 for driving the inner gear ring 260 to rotate. The first drive motor 510, the second drive motor 520, the third drive motor 530, and the fourth drive motor 540 are arranged around the base plate 150 of the base 100. The spindle assembly 600 is located in the middle of the area surrounded by the first drive motor 510, the second drive motor 520, the third drive motor 530, and the fourth drive motor 540 and is coaxial with the circular through hole 161. Preferably, the first drive motor 510 is a 7.5kW motor, and its output end is connected to a first worm gear reducer 511, the output end of which is connected to a first helical gear 512; the second drive motor 520 is a 7.5kW motor, and its output end is connected to a second worm gear reducer 521, the output end of which is connected to a drive pulley 522; the third drive motor 530 is a 2.2kW motor, and its output end is connected to a third worm gear reducer 531, the output end of which is connected to a first drive spur gear 532; the fourth drive motor 540 is a 2.2kW motor, and its output end is connected to a fourth worm gear reducer 541, the output end of which is connected to a second drive spur gear 542. The spindle assembly 600 includes a central shaft 610 rotatably mounted on the base 100 and connected to the inner ring sleeve 270, a first rotating drum 620 rotatably sleeved on the central shaft 610 and connected to the lower grinding disc 210, a second rotating drum 630 rotatably sleeved on the central shaft 610 and connected to the outer gear ring 250, and a third rotating drum 640 rotatably sleeved on the central shaft 610 and connected to the inner gear ring 260. A driven pulley 611 that is belt driven by the driving pulley 522 is fixed on the central shaft 610. A second helical gear 621 that meshes with the first helical gear 512 is fixed on the first rotating drum 620. A first driven spur gear 631 that meshes with the first driving spur gear 532 is fixed on the second rotating drum 630. A second driven spur gear 641 that meshes with the second driving spur gear 542 is fixed on the third rotating drum 640.In this embodiment, the first helical gear 512, the drive pulley 522, the first drive spur gear 532, and the second drive spur gear 542 all rotate in a horizontal plane (i.e., their axes of rotation extend vertically), and their vertical heights are all different to accommodate gears or pulleys at different heights on the central shaft 610. The first rotating drum 620 and the central shaft 610 rotate in opposite directions. Thus, during the operation of the polishing device 10, the upper grinding disc 360, the lower grinding disc 210, the internal gear ring 260, and the external gear ring 250 are driven to rotate by four drive motors, thereby achieving simultaneous and uniform polishing of both sides of the product.

[0040] Please combine Figure 1-10 In one embodiment, a plurality of grinding fluid connectors 361 are distributed on the upper surface of the upper grinding disc 360. A guide groove communicating with each grinding fluid connector 361 is formed inside the upper grinding disc 360. A distribution groove communicating with the guide groove and used to guide the grinding fluid to various parts of the grinding area is formed on the lower surface of the upper grinding disc 360. This ensures that all parts of the upper grinding disc 360 that come into contact with the product can be in contact with the grinding fluid. A ring-shaped water receiving groove 321 for receiving grinding fluid is fixed to the upper surface of the connecting plate 320; that is, the water receiving groove 321 is also a ring-shaped structure with a U-shaped cross-section. The bottom of the water receiving tank 321 has several liquid delivery holes 322. The connecting plate 320 has several through holes that correspond to and communicate with each of the liquid delivery holes 322. A liquid guide connector 323 is fixed to each through hole on the lower surface of the connecting plate 320. Each liquid guide connector 323 is connected to each grinding fluid connector 361 via a pipe (not shown in the figure). By setting up the water receiving tank 321, during the polishing operation, liquid can be delivered into the water receiving tank 321 through a water pipe suspended above it. This ensures simultaneous liquid delivery to each liquid guide connector 323 while preventing the pipes from tangling during rotation. The mounting plate 340 is fixedly connected to the connecting plate 320 via multiple connecting posts 341 arranged in a ring in the horizontal plane. The mounting plate 340 is screwed to the upper grinding disc 360.

[0041] The upper plate assembly 300 also includes a bearing 324 fixed to the upper surface of the connecting plate 320 and located within the ring area of ​​the water receiving tank 321; a bearing housing cover 325 rotatably mounted on the bearing 324 and vertically positioned in relation to the bearing 324; a support plate 370 fixed to the upper surface of the bearing housing cover 325; the top of the tension / compression sensor 330 is fixedly connected to the mounting bracket 120; the bottom of the tension / compression sensor 330 is fixedly connected to the middle of the support plate 370; the telescopic end of the telescopic drive member 310 is connected to the support plate 370; a guide block 371 is provided on the side of the mounting bracket 120; and a guide shaft 372 is fixed on the support plate 370 and slides through the guide block 371. Additionally, the upper plate assembly 300 also includes a cable chain connected to the housing of the telescopic drive member and the support plate. In this embodiment, the connecting plate 320 is rotatably coupled to the support plate 370 via the bearing 324 and the bearing housing cover 325. The support plate 370 is further connected to the telescopic drive member 310 for lifting and lowering. Thus, while the upper grinding disc 360 can be lifted and lowered under the drive of the telescopic drive member 310, it can also rotate under the drive of the inner ring 270 to perform double-sided polishing of the product. Furthermore, the telescopic end of the telescopic drive member 310 passes through the tension / compression sensor 330 and is connected to the support plate 370 to ensure uniform force distribution on the support plate 370. By setting the guide shaft 372 and the guide block 371, the horizontal swaying of the upper grinding disc 360 during lifting and lowering can be reduced.

[0042] Please combine Figure 1-11The hook includes two cantilever arms that are arranged opposite each other and both extend vertically, a support arm 412 fixed to the bottom end of the two cantilever arms and located on the side of the cantilever arms adjacent to the upper grinding disc 360, a connecting arm 413 connecting the two support arms 412, and a connecting shaft 414 fixedly connected to the top end of the two cantilever arms. The cantilever arm includes a first arm 415 fixedly connected to the connecting shaft 414, and a second arm 416 located at the lower end of the first arm 415 and fixedly connected to the support arm 412. The first arm 415 has a first toothed portion 4151 on the side facing away from the other first arm 415, and the second arm 416 has a second toothed portion 4161 that meshes with the first toothed portion 4151. The first arm 415 has a limiting hole 4152 extending vertically in the area where the first toothed portion 4151 is located. The limiting hole 4152 can also be two holes arranged at intervals in the vertical direction on the first arm 415. An adjustment through hole 4162 extending vertically is provided on the second arm 416 in the area where the second toothed portion 4161 is located. The first arm 415 is fixedly connected to the second arm 416 by a screw 417 that passes through the limiting hole 4152 and is inserted into the adjustment through hole 4162. By setting two cantilever arms, a support arm 412, and a connecting arm 413, the contact area between the hook and the upper grinding disc 360 can be increased, the force on a single arm can be reduced, so as to avoid the overload breakage of a single arm and thus extend the service life of the hook. By setting a first arm 415 and a second arm 416, and setting a limiting hole 4152 on the first arm 415 and an adjustment through hole 4162 on the second arm 416, the overall length of the cantilever can be adjusted by adjusting the relative position between the first arm 415 and the second arm 416 and then tightening the screw 417 to adapt to different safe lifting heights of the upper grinding disc 360 (where the operator puts or picks up materials at the safe lifting height of the upper grinding disc 360). By setting a first toothed part 4151 on the first arm 415 and a second toothed part 4161 on the second arm 416, the friction between the first arm 415 and the second arm 416 can be increased, avoiding the problem of the second arm 416 sliding down relative to the first arm 415 due to excessive tension after the first arm 415 and the second arm 416 are assembled, thereby improving the safety of operation.

[0043] The drive mechanism 411 is a dual-head motor, and the connecting shaft 414 includes two spaced-apart shaft segments. Each shaft segment is connected to a first arm 415 and an output shaft of the dual-head motor. The hook rotates in the vertical plane under the drive of the drive mechanism 411. Alternatively, the drive mechanism 411 can be a pneumatic cylinder, hydraulic cylinder, or electric cylinder. The piston rod of the drive mechanism 411 is drivenly connected to the connecting shaft 414 to push the hook to move horizontally. In other words, depending on the drive mechanism 411, the two hook mechanisms 410 can be lifted together by rotating the hook, or the two hooks can be simultaneously removed from the upper grinding plate 360 ​​to release the constraint on the upper grinding plate 360. Alternatively, the two hook mechanisms 410 can be lifted together by moving the hook horizontally, or the two hooks can be simultaneously removed from the upper grinding plate 360 ​​to release the constraint on the upper grinding plate 360. Preferably, in this embodiment, the drive mechanism 411 is a dual-head motor, and the hook rotates under the drive of the drive mechanism 411. In addition, in this embodiment, the telescopic drive member 310 is provided with a displacement sensor or infrared sensor that is electrically connected to the telescopic drive member 310 and is used to detect the rising position of the telescopic end of the telescopic drive member 310. The displacement sensor or infrared sensor is electrically connected to the drive mechanism 411 of the hook mechanism 410. Thus, when the displacement sensor or infrared sensor detects that the upper grinding disc 360 rises or falls (or the telescopic drive member 310 moves), it sends an electrical signal to the drive mechanism 411. For example, after the upper grinding disc 360 rises, the drive mechanism 411 drives the hooks to automatically retract to the left and right sides of the upper grinding disc 360, and the upper grinding disc 360 is suspended between the two hook mechanisms 410. If it is detected that the upper grinding disc 360 is about to fall, the drive mechanism 411 controls the hooks to open so that the upper grinding disc 360 can fall and perform operations.

[0044] The polishing device 10 also includes a safety pin (not shown) fixed to the mounting bracket 120. The safety pin has a telescopic limiting part that can extend and retract to restrict the rotation of the upper grinding disc 360. Thus, before polishing, the safety pin is controlled to retract and the hooks are opened, thereby releasing the constraint on the upper grinding disc 360 to allow it to operate. After polishing, the safety pin is controlled to extend and engage with the corresponding hole on the rotating shaft of the upper grinding disc 360, while the two hooks approach and support the upper grinding disc 360, thereby braking the upper grinding disc 360 to ensure the safe handling of material loading and unloading operations.

[0045] An electrical control box 700 is mounted on the outer wall of the base 100, and a control panel 800 electrically connected to the electrical control box 700 is mounted on the mounting bracket 120. The electrical control box 700 contains a power module, an air pump, and a controller. This controller is a PLC controller electrically connected to the power module. The air pump is electrically connected to the controller via a solenoid valve. The controller is also electrically connected to the telescopic drive component 310, the drive mechanism 411, and each drive motor to control the operation of each electrical component. The control panel 800 includes a display screen and operating controls electrically connected to the controller. Operators can control the raising and lowering of the upper grinding disc 360, the opening and closing of the safety hook assembly 400, the movement of the safety pin, and the rotation and stopping of rotating components such as the upper grinding disc 360 and the lower grinding disc 210 by operating the relevant operating controls. During the operation of the polishing device 10, the operating status and relevant operating parameters of the equipment can be displayed in real time on the display screen, allowing operators to monitor the equipment.

[0046] When the polishing device 10 is working, taking the polishing of glass sheets as an example, firstly, the glass sheets to be polished are placed one by one into the slots on the planetary wheel diaphragm (carrier), so that the bottom surface of the glass sheet contacts the upper surface of the lower grinding disc 210, causing the safety pin to retract and the safety hook assembly 400 to open. Then, the telescopic drive 310 is activated to push the upper grinding disc 360 to press the surface of the glass sheet. The external liquid supply system is activated, and the grinding fluid is injected into the grinding fluid inlet 361 of the upper grinding disc 360 through the water receiving tank 321. The grinding fluid is poured into the friction interface between the glass sheet and the upper grinding disc 360 and the lower grinding disc 210 through the guide groove and the distribution groove at the bottom of the upper grinding disc 360. Then, each drive motor is activated to drive the upper grinding disc 360, the lower grinding disc 210, the inner gear ring 260, and the outer gear ring 250 to rotate. At the same time, the planetary wheel diaphragm rotates due to the interaction between the inner gear ring 260 and the outer gear ring 250. During the polishing stage, the glass slide undergoes a combined revolution and rotation motion with the planetary gear film. Its bottom surface continuously rubs against the lower grinding disc 210 to achieve polishing, while its top surface continuously rubs against the upper grinding disc 360 to achieve polishing. The grinding fluid serves to lubricate, cool, and grind. Finally, after the set polishing time is reached, the drive motor is stopped and the external fluid supply is halted. Then, the telescopic drive component 310 is controlled to pull the upper grinding disc 360 away from the glass slide surface. Simultaneously, the safety pin extends and the safety hook assembly 400 closes to support the upper grinding disc 360. The glass slide can then be safely removed manually from the planetary gear film cavity by squeezing the vacuum suction cup.

[0047] The polishing device 10 described above includes a tension / compression sensor 330 installed between the telescopic drive component 310 and the connecting plate 320. During the polishing process, the tension / compression sensor 330 detects the pressure value of the processing section in real time, so that the telescopic drive component 310 can adjust the height of the upper grinding disc 360 to compensate for the pressure of the processing section, thus keeping the pressure stable during product polishing, improving the stability of the equipment during operation, which is beneficial to improving the polishing accuracy of the product and extending the service life of the equipment. A displacement sensor 350 is installed on the lower surface of the mounting plate 340. The displacement sensor 350 detects the grinding amount of the product in real time. When the preset grinding amount is reached, the first drive motor 510 receives the signal from the displacement sensor 350 and stops. This can avoid the problem of wear on the product positioning structure (carrier) caused by excessive grinding, so as to ensure the positioning accuracy of the product positioning structure on the product, thereby improving the processing accuracy of the product.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A polishing apparatus, characterized in that, include: The base has a drive chamber inside and a mounting bracket fixedly connected to the base on its upper part. The lower grinding plate assembly includes a lower grinding plate rotatably mounted on a base, a first drive motor housed in a drive chamber and driving the lower grinding plate to rotate in a horizontal plane, the lower grinding plate extending from the upper surface of the base, and the upper surface of the lower grinding plate forming a grinding area for receiving products. The upper plate assembly includes a telescopic drive component mounted on a mounting bracket, a connecting plate located below the telescopic drive component and drivenly connected to the telescopic end of the telescopic drive component, a tension / compression sensor located between the telescopic end and the connecting plate and electrically connected to the telescopic drive component, a mounting plate located below the connecting plate and fixedly connected to the connecting plate, a displacement sensor fixed to the lower surface of the connecting plate and electrically connected to the first drive motor, and an upper grinding disc with an annular structure fixed to the lower surface of the mounting plate and used for receiving grinding fluid. The upper grinding disc corresponds to the grinding area, and the mounting plate has detection holes corresponding to the displacement sensor and the grinding area. A safety hook assembly includes two hook mechanisms symmetrically arranged on both sides of a telescopic drive member. Each hook mechanism includes a drive mechanism fixed on a mounting bracket and electrically connected to the telescopic drive member, and a hook driven by the drive mechanism. The bottom end of each hook is provided with a support arm. The hook moves under the drive of the drive mechanism to allow the support arm to support or move away from the upper grinding disc.

2. The polishing apparatus according to claim 1, characterized in that, The lower grinding plate assembly also includes a grinding disc support and a water shroud. The grinding disc support is fixedly connected to the base, and the lower grinding disc is rotatably mounted on the grinding disc support. The upper surface of the grinding disc support is provided with a wastewater tank for receiving grinding waste liquid, and the bottom of the grinding disc support is equipped with a wastewater interface that communicates with the wastewater tank and an external wastewater pipe. The water shroud surrounds the lower grinding disc and is fixedly connected to the grinding disc support. The inner surface of the water shroud and the annular side surface of the lower grinding disc form an annular liquid guiding area that communicates with the wastewater tank.

3. The polishing apparatus according to claim 2, characterized in that, The lower grinding disc is an annular grinding disc connected to the first drive motor. The grinding disc support is an annular structure. The lower disc assembly also includes an outer gear ring located inside the grinding disc support and rotatably arranged around the outer side of the lower grinding disc, an inner gear ring rotatably arranged in the inner region of the lower grinding disc ring, a plurality of outer toothed pins arranged annularly along the upper surface of the outer gear ring, a plurality of inner toothed pins arranged annularly along the upper surface of the inner gear ring, and an inner ring sleeve rotatably arranged in the inner region of the inner gear ring and detachably connected to the upper grinding disc to drive the upper grinding disc to rotate. The plurality of outer toothed pins, the plurality of inner toothed pins, and the upper surface of the lower grinding disc together form the grinding area in which a plurality of glass carriers can be arranged annularly.

4. The polishing apparatus according to claim 3, characterized in that, The upper surface of the upper grinding disc is provided with a number of grinding fluid connectors. The upper grinding disc is provided with a guide groove that communicates with each grinding fluid connector. The lower surface of the upper grinding disc is provided with a diversion groove that communicates with the guide groove and is used to guide the grinding fluid to various parts of the grinding area.

5. The polishing apparatus according to claim 4, characterized in that, The upper surface of the connecting plate is fixed with a ring-shaped water receiving tank for receiving grinding fluid. The bottom of the water receiving tank has several fluid delivery holes. The connecting plate has several through holes that correspond to and communicate with each fluid delivery hole. The lower surface of the connecting plate is fixed with a fluid guiding connector at each through hole. Each fluid guiding connector is connected to each grinding fluid connector through a pipe. The mounting plate is fixedly connected to the connecting plate by a plurality of connecting columns arranged in a ring in the horizontal plane. The mounting plate is connected to the upper grinding disc with screws.

6. The polishing apparatus according to claim 5, characterized in that, The upper plate assembly also includes a bearing fixed to the upper surface of the connecting plate and located in the water receiving groove ring area, a bearing seat cover rotatably mounted on the bearing and vertically matched with the bearing, and a support plate fixed to the upper surface of the bearing seat cover. The top of the tension and compression sensor is fixedly connected to the mounting bracket, the bottom of the tension and compression sensor is fixedly connected to the middle of the support plate, the telescopic end of the telescopic drive is connected to the support plate, the side of the mounting bracket is provided with a guide block, and a guide shaft that slides through the guide block is fixed on the support plate.

7. The polishing apparatus according to claim 1, characterized in that, The hook includes two cantilever arms that are arranged opposite each other and extend vertically, a support arm fixed to the bottom end of the two cantilever arms and located on the side of the cantilever arm adjacent to the upper grinding disc, a connecting arm connecting the two support arms, and a connecting shaft fixedly connected to the top end of the two cantilever arms. The cantilever arm includes a first arm fixedly connected to the connecting shaft and a second arm located at the lower end of the first arm and fixedly connected to the support arm. The first arm has a first toothed portion on the side facing away from the other first arm, and the second arm has a second toothed portion that meshes with the first toothed portion. The first arm has a limiting hole extending vertically in the area where the first toothed portion is located, and the second arm has an adjusting through hole extending vertically in the area where the second toothed portion is located. The first arm is fixedly connected to the second arm by a screw that passes through the limiting hole and is inserted into the adjusting through hole.

8. The polishing apparatus according to claim 7, characterized in that, The driving mechanism is a dual-head motor, and the connecting shaft includes two spaced-apart shaft segments. Each shaft segment is connected to a first arm and an output shaft of the dual-head motor. The hook rotates in a vertical plane under the drive of the driving mechanism; or the driving mechanism is a pneumatic cylinder, hydraulic cylinder, or electric cylinder. The piston rod of the driving mechanism is driven and connected to the connecting shaft to push the hook to move in the horizontal direction.

9. The polishing apparatus according to claim 1, characterized in that, The polishing device also includes a safety pin fixed on a mounting bracket, the safety pin having a telescopic limiting portion that can extend and retract to restrict the rotation of the upper grinding disc.

10. The polishing apparatus according to claim 1, characterized in that, An electrical control box is installed on the outer wall of the base, and a control panel that is electrically connected to the electrical control box is provided on the mounting bracket.

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