A ship propeller polishing device

Abstract

This invention provides a ship propeller polishing device, including a support base, a main cantilever, a dual-axis moving assembly, an angle adjustment assembly, a floating grinding assembly, and a chip blowing assembly. The support base achieves horizontal position adjustment through the dual-axis moving assembly, and the main cantilever, in conjunction with the angle adjustment assembly, achieves multi-degree-of-freedom attitude adjustment of the grinding head. The floating grinding assembly uses an airbag as an elastic element, and adjusts the internal air pressure of the airbag through a floating air pump to achieve stepless adjustable floating grinding pressure. The chip blowing assembly uses a telescopic air blowing head that switches positions via centrifugal force. When grinding starts, it automatically extends and connects to the airbag air passage to blow away chips, and automatically retracts and closes the air passage when it stops. This realizes the reuse of air passages and automatic linkage of functions between the floating grinding and chip blowing assemblies, solving the problems of difficult grinding pressure adjustment and easy blockage of the chip blowing air passage in existing polishing devices.

Description

Technical Field

[0001] This invention belongs to the field of ship propeller polishing technology, and more specifically, relates to a ship propeller polishing device. Background Technology

[0002] As the propulsion component of a ship's power system, the polishing process is crucial for ensuring the surface quality of the propeller. With the shipbuilding industry moving towards larger and more sophisticated designs, the size and weight of propellers are continuously increasing.

[0003] Traditional manual polishing methods suffer from high labor intensity, harsh working environments, and significant fluctuations in polishing quality due to operator skill, making them unsuitable for the production demands of modern shipbuilding. Automated polishing equipment is gradually becoming the mainstream application in the industry. However, existing automated polishing equipment often uses springs as elastic elements, with fixed spring stiffness, making it impossible to adjust the polishing pressure. This easily leads to uneven polishing pressure, resulting in over-polishing or under-polishing, affecting the propeller's surface accuracy. Furthermore, the chip blowing system is open when not in operation, allowing polishing chips and dust to easily enter the chip blowing air passages, causing blockages and affecting subsequent chip blowing effects. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a ship propeller polishing device, which solves the technical problems in the prior art where traditional polishing devices mostly use springs as elastic elements with fixed spring stiffness, making it impossible to adjust the polishing pressure, easily leading to uneven polishing pressure, and easy blockage of the chip blowing air passage.

[0005] The purpose and effect of the ship propeller polishing device of the present invention are achieved by the following specific technical means: A ship propeller polishing device, comprising: A support base with a main cantilever hinged to the top of the support base, one end of which is connected to a swing joint. A floating grinding assembly is rotatably connected to the bottom of a swing joint. The floating grinding assembly includes a grinding head and a grinding arm. The grinding arm is rotatably connected to the swing joint. A floating shaft is provided inside the grinding arm. A transmission sleeve is slidably sleeved on the floating shaft. A grinding head is provided at the bottom end of the transmission sleeve. An air bladder is provided between the transmission sleeve and the floating shaft. Gas is introduced into the air bladder to push the transmission sleeve to move on the floating shaft to push out the grinding head, thereby realizing floating grinding. The chip blowing assembly is mounted on the grinding arm. The chip blowing assembly includes a telescopic air head located in either the storage position or the chip blowing position. Telescopic air heads are provided on both sides of the transmission sleeve. When the telescopic air head is in the chip blowing position, the air bladder is connected to the telescopic air head, and the gas in the air bladder is blown out from the telescopic air head to blow away the chips. When the telescopic air head is in the storage position, the air bladder is not connected to the telescopic air head, and the telescopic air head is located inside the transmission sleeve to seal the air passage.

[0006] In a further embodiment, the floating polishing assembly further includes a floating air pump, one end of the polishing arm is connected to the adjusting arm, the swing joint is connected to the other end of the adjusting arm through the angle adjusting assembly, and the floating air pump is provided at the top of the adjusting arm. The top of the floating shaft is connected to the connecting shaft. The top of the connecting shaft has a connecting air passage. The top of the connecting air passage has a rotating connector. One end of the floating air pump has an air pipe. One end of the air pipe is connected to the rotating connector through a connecting joint.

[0007] In a further embodiment, the bottom end of the connecting shaft is provided with a connecting end, the top end of the floating shaft is connected to the connecting end, the top end of the floating shaft is provided with a floating air passage, the connecting air passage is connected to the floating air passage, the bottom of the connecting end is provided with a first mounting groove, the airbag is located in the first mounting groove and one end is connected to the connecting end, and the other end is connected to the transmission sleeve, both sides of the floating shaft are provided with air outlets connected to the floating air passage, and both sets of air outlets are provided with one-way valves; the top end of the transmission sleeve is provided with a sliding hole, the floating shaft slides through the sliding hole, the bottom end of the floating shaft is provided with a limiting circular plate, the radius of the limiting circular plate is larger than the radius of the sliding hole.

[0008] In a further embodiment, a grinding motor is provided at the top of the adjusting arm, and a connecting seat is provided at the end of the grinding arm adjacent to the adjusting arm. Multiple sets of buffer pads are provided between the two sets of connecting seats, and the two sets of connecting seats are connected by multiple sets of screws. A first pulley is provided on the outside of the connecting shaft, and the main shaft of the grinding motor is connected to a second pulley. The first pulley and the second pulley are connected by a belt. Two sets of bearings are provided at both ends of the connecting shaft and between the grinding arm.

[0009] In a further embodiment, the chip blowing assembly includes two sets of movable plates, and mounting slots are provided on both sides of the transmission sleeve. Two sets of telescopic blowing heads are respectively located in the two sets of mounting slots. Two sets of sliding brackets are provided in the mounting slots. The sliding brackets and the inner wall of the mounting slots form sliding grooves. Sliding blocks are provided on both sides of the two sets of movable plates. The two sets of sliding blocks are slidably connected to the two sets of sliding grooves respectively. A limit block is provided at one end of the sliding bracket. A connecting cylinder is provided at the bottom of the movable plate. The top of the telescopic blowing head is installed in the connecting cylinder. When the movable plate is in the storage position, the telescopic air head is located in the mounting groove, and the sliding block is located in the sliding groove at the end away from the limit block. When the moving plate is in the chip blowing position, the telescopic air blowing head is outside the mounting groove, and the sliding block is in contact with the limit block inside the sliding groove.

[0010] In a further embodiment, the movable plate and the connecting cylinder are provided with a chip blowing air passage, the bottom end of the chip blowing air passage is connected to the telescopic blowing head, the top end of the transmission sleeve is provided with a connecting channel, the top end of the connecting channel is provided with a connecting air pipe, and the top end of the connecting air pipe is connected to the air bag. A reset rod is provided on one side of the connecting cylinder. A reset spring is sleeved on the reset rod to reset the moving plate from the chip blowing position to the storage position. One end of the reset spring is connected to the inner wall of the first mounting groove, and the other end is connected to the connecting cylinder.

[0011] In a further embodiment, a closing plate is provided at the opening of the first mounting groove, a rotating seat is provided at the top of the first mounting groove, the top of the closing plate is rotatably connected to the rotating seat through a rotating shaft, and a flip-cover spring is provided inside the rotating seat corresponding to the closing plate. When the moving plate is in the chip blowing position, the sealing plate opens the first mounting slot in a horizontal position, and the top of the chip blowing air passage is connected to the connecting air pipe. The gas in the airbag is ejected from the telescopic blowing head through the connecting air pipe and the chip blowing air passage. When the movable plate is in the storage position, the telescopic blowing head is located in the first mounting slot, the sealing plate vertically seals the first mounting slot, and the top of the chip blowing airway is not connected to the connecting air pipe.

[0012] In a further embodiment, the angle adjustment assembly includes two sets of side plates, a mounting plate is provided between the two sets of side plates, an angle adjustment shaft is provided on one side of the mounting plate, the bottom end of the swing joint is rotatably connected to the angle adjustment shaft, an angle adjustment motor is provided on the top of the swing joint, and the main shaft of the angle adjustment motor is connected to the angle adjustment shaft through a gear transmission structure. The angle adjustment assembly also includes an orientation adjustment motor. A gearbox is provided at the bottom of the mounting plate. An orientation adjustment motor is provided at one end of the gearbox. The main shaft of the orientation adjustment motor is connected to the gearbox. An orientation adjustment disc is provided at the other end of the gearbox. One end of the adjustment arm is connected to the orientation adjustment disc.

[0013] In a further embodiment, the top of the support base is provided with two sets of hinge seats, and the two sides of the main cantilever are rotatably connected to the two sets of hinge seats respectively through rotating shafts. The top of the support base is also provided with a rotating seat, the top of the main cantilever is provided with a connecting seat, the top of the rotating seat is provided with a hydraulic cylinder, the top of the hydraulic cylinder is rotatably connected to the connecting seat through a connecting shaft, the support base is provided with a hydraulic drive device, and the hydraulic cylinder and the hydraulic drive device are connected through oil pipes; the end of the main cantilever away from the floating grinding component is provided with a counterweight end.

[0014] In a further embodiment, a dual-axis moving assembly is provided at the bottom of the support base. The dual-axis moving assembly includes an X-axis adjusting base, an X-axis adjusting screw is provided at the top of the X-axis adjusting base, and a first threaded sleeve is provided at the bottom of the support base, with the first threaded sleeve sleeved on the X-axis adjusting screw. The dual-axis moving assembly also includes a Y-axis adjusting base installed on the ground. The top and bottom of the Y-axis adjusting base are provided with Y-axis adjusting screws. The bottom of the X-axis adjusting base is provided with two sets of moving plates. Sliding rails are provided on both sides of the Y-axis adjusting base. Sliding blocks are provided on the adjacent side of the two sets of moving plates. The sliding blocks are slidably connected to the sliding rails. The bottom ends of the two sets of moving plates are connected to a connecting plate. A second threaded sleeve is provided on the connecting plate. The second threaded sleeve is fitted onto the Y-axis adjusting screw.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Utilizing an airbag as the elastic element for floating polishing replaces the traditional spring structure. By adjusting the inflation volume of the floating air pump, the internal pressure of the airbag can be changed in real time, thereby adjusting the polishing pressure of the polishing head. This adapts to the polishing needs of ship propellers with different curvatures, avoiding over-polishing or under-polishing caused by uneven polishing pressure, and ensuring the surface accuracy and quality of the propeller. The airbag itself has excellent cushioning performance, absorbing vibrations generated during polishing. Combined with the buffer pad between the polishing arm and the adjusting arm, it further reduces the impact of vibration on polishing quality, while also reducing rigid collisions between the polishing head and the workpiece, protecting both the workpiece and the polishing head from damage. The one-way valve on the floating shaft ensures stable internal pressure of the airbag, prevents gas backflow, and improves the stability of floating polishing.

[0016] 2. By reusing the air circuits of the chip blowing assembly and the floating grinding assembly, there is no need to configure separate chip blowing air pumps, solenoid valves, and delivery pipelines. Utilizing the gas inside the air bladder as the chip blowing air source reduces the structural complexity and manufacturing cost of the equipment, and reduces energy consumption. The chip blowing assembly adopts a centrifugal force-driven automatic switching structure. When the grinding motor starts and drives the transmission sleeve to rotate, the centrifugal force causes the telescopic air blowing head to automatically extend to the chip blowing position. At the same time, the chip blowing air passage is automatically connected to the air bladder, and the gas inside the air bladder is ejected from the telescopic air blowing head to blow chips from the grinding position. When the grinding motor stops, the telescopic air blowing head automatically retracts into the transmission sleeve under the action of the return spring, the sealing plate automatically closes the mounting slot opening, and the chip blowing air passage is disconnected from the air bladder. This effectively prevents iron filings and dust generated during polishing from entering the chip blowing air passage and causing blockage, ensuring the long-term stability of the chip blowing effect.

[0017] 3. By integrating the floating grinding component with the chip blowing component, the number of external pipes and cables is reduced, preventing entanglement and wear of pipes and cables during multi-degree-of-freedom movement, thus improving the stability and service life of the equipment. Automatic linkage is achieved through a mechanical structure, with grinding and chip blowing actions starting and stopping synchronously, eliminating the need for a separate control unit, simplifying the equipment's control system and reducing operational difficulty. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembled structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after it has been unfolded; Figure 3 This is a schematic diagram of the assembled dual-axis moving component in this invention; Figure 4 This is a schematic diagram of the disassembled dual-axis moving component in this invention; Figure 5 This is a schematic diagram of the assembled angle adjustment component in this invention; Figure 6 This is a schematic diagram of the angle adjustment component after disassembly in this invention; Figure 7 This is a schematic diagram of the structure of the grinding arm and the adjusting arm after assembly in this invention; Figure 8 This is a schematic diagram of the structure of the grinding arm and the adjusting arm after separation in this invention; Figure 9 This is a schematic diagram of the assembled floating polishing component in this invention; Figure 10 This is a schematic diagram of the disassembled floating polishing component in this invention; Figure 11 This is a schematic diagram of the assembled structure of the chip blowing assembly in this invention; Figure 12 This is a schematic diagram of the disassembled chip blowing assembly in this invention; Figure 13 This is a schematic diagram of the structure of the telescopic air blowing head in the storage position in this invention; Figure 14 This is a schematic diagram of the structure of the telescopic air blowing head in the present invention when it is located in the chip blowing position.

[0019] In the diagram, the correspondence between component names and drawing numbers is as follows: 101. Support base; 102. Main cantilever; 103. Swing joint; 104. Side plate; 105. Mounting plate; 106. Angle adjustment shaft; 107. Angle adjustment motor; 108. Gear transmission structure; 109. Orientation adjustment motor; 110. Gearbox; 111. Orientation adjustment disc; 112. Hinge base; 113. Second rotating base; 114. Second connecting base; 115. Hydraulic cylinder; 116. Hydraulic drive device; 117. Oil pipe; 118. Counterweight end; 119. X-axis adjustment base; 120. X-axis adjustment screw; 121. First threaded sleeve; 122. Y-axis adjustment base; 123. Y-axis adjustment screw; 125. Sliding rail; 126. Second moving plate; 127. Second sliding block; 128. Connecting plate; 129. Second threaded sleeve; 201. Grinding head; 202. Grinding arm; 203. Floating shaft; 204. Transmission sleeve; 205. Airbag; 206. Floating air pump; 207. Adjusting arm; 209. Connecting air passage; 210. Rotating connector; 211. Air pipe; 212. Connecting shaft; 213. Connecting end; 214. Floating air passage; 215. First mounting slot; 216. Air outlet; 217. One-way valve; 218. Sliding hole; 219. Limiting circular plate; 220. Grinding motor; 221. First connecting seat; 222. Buffer pad; 223. First pulley; 224. Second pulley; 225. Belt; 226. Bearing; 227. Connecting connector; 301. Telescopic air blowing head; 302. First moving plate; 303. Second mounting groove; 304. Sliding bracket; 305. Sliding groove; 306. First sliding block; 307. Limiting block; 308. Connecting cylinder; 309. Chip blowing air passage; 310. Connecting channel; 311. Connecting air pipe; 312. Reset rod; 313. Reset spring; 314. Sealing plate; 315. First rotating seat. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but should not be used to limit the scope of protection of the present invention.

[0021] Example:

[0022] As attached Figures 1 to 14 As shown: This invention provides a ship propeller polishing device, comprising: A main cantilever 102 is hinged to the top of the support base 101. One end of the main cantilever 102 is connected to a swing joint 103. The main cantilever 102 is used to adjust the longitudinal height of the grinding head 201, and the swing joint 103 is used to adjust the pitch angle of the grinding head 201 to adapt to the polishing requirements of different curved surfaces of the propeller. A floating grinding assembly is rotatably connected to the bottom of the swing joint 103. The floating grinding assembly is electrically connected to an external control terminal and receives instructions from the external control terminal to complete the grinding pressure adjustment and rotational grinding actions. The floating grinding assembly includes a grinding head 201 and a grinding arm 202. Grinding arm 202 is rotatably connected to swing joint 103. A floating shaft 203 is installed inside grinding arm 202, arranged vertically. A transmission sleeve 204 is slidably sleeved on the floating shaft 203, providing sliding guidance for the transmission sleeve 204. A grinding head 201 is installed at the bottom end of the transmission sleeve 204, which transmits rotational power and drives the grinding head 201 to rotate synchronously. An air bladder 205 is installed between the transmission sleeve 204 and the floating shaft 203. An air pressure sensor and an exhaust valve are installed inside the air bladder 205. The air pressure sensor is connected to an external control terminal. Electrical connection is established to collect real-time air pressure data inside the airbag 205 and transmit it to an external control terminal. The external control terminal adjusts the inflation volume of the airbag 205 according to preset grinding pressure parameters, inputting gas into the airbag 205 to push the transmission sleeve 204 to move on the floating shaft 203 to push out the grinding head 201, realizing floating grinding. When the grinding head 201 contacts the propeller surface and generates pressure changes, the airbag 205 can automatically adapt to the curvature of the propeller surface through its own volume changes to maintain stable grinding pressure. The chip blowing assembly is installed on the grinding arm 202, and the chip blowing assembly is connected to the external control terminal. The unit is electrically connected to the control terminal and receives instructions from the external control terminal to start the chip blowing process. The chip blowing assembly includes a telescopic air head 301 located in the storage position or the chip blowing position. Telescopic air heads 301 are provided on both sides of the transmission sleeve 204. When the telescopic air head 301 is located in the chip blowing position, the air passage between the air bag 205 and the telescopic air head 301 is automatically connected. The gas in the air bag 205 is blown out from the telescopic air head 301 to blow away the chips. During the chip blowing process, the external control terminal can adjust the air pressure of the air bag 205 according to the grinding conditions to meet both the pressure requirements of floating grinding and the airflow requirements of chip blowing.When the telescopic air head 301 is in the retracted position, the air passage between the air bag 205 and the telescopic air head 301 is automatically disconnected. The telescopic air head 301 is retracted into the transmission sleeve 204 and the air passage is sealed to prevent iron filings and dust generated during polishing from entering the air passage and causing blockage. The external control terminal is simultaneously electrically connected to the execution component of the floating polishing assembly to realize synchronous control of polishing start, pressure adjustment, and chip blowing start and stop. When the external control terminal sends a polishing start command, the air bag 205 is first inflated to the preset air pressure, and then the polishing motor is started to drive the transmission sleeve 204 and the polishing head 201 to rotate. At the same time, the chip blowing assembly is triggered to switch from the retracted position to the chip blowing position. The air pressure sensor continuously monitors the air pressure inside the air bag 205. When the air pressure is lower than the preset lower limit, the external control terminal automatically controls the replenishment of gas. When the air pressure is higher than the preset upper limit, the exhaust valve is automatically controlled to discharge excess gas to ensure the pressure stability during the floating polishing process. When the external control terminal sends a grinding stop command, the air inflation action stops, the transmission sleeve 204, floating shaft 203, and grinding head 201 stop rotating, and the chip blowing assembly automatically switches from the chip blowing position to the chip collection position.

[0023] The floating polishing assembly also includes a floating air pump 206, which is electrically connected to an external control terminal. The floating air pump 206 receives commands from the external control terminal to complete the gas filling action. One end of the polishing arm 202 is connected to the adjusting arm 207. The swing joint 103 is connected to the other end of the adjusting arm 207 via an angle adjustment component, which is also electrically connected to an external control terminal. This component receives angle adjustment commands from the external control terminal, causing the adjusting arm 207 and the polishing arm 202 to adjust their pitch and rotation angles, ensuring that the polishing head 201 always maintains perpendicular contact with the propeller and the surface to be polished. A floating air pump 206 is installed at the top of the adjusting arm 207, providing compressed gas to the airbag 205. The top of the floating shaft 203 is connected to a connecting shaft 212, which has both power transmission and gas transmission functions. The floating shaft 203 and the transmission sleeve 204 rotate synchronously, and the gas output by the floating air pump 206 can be transmitted to the air bag 205. The top end of the connecting shaft 212 is provided with a connecting air passage 209, which extends axially along the connecting shaft 212 to provide a transmission channel for the gas. The top end of the connecting air passage 209 is provided with a rotating connector 210, which adopts a dynamic sealing structure, allowing the connecting shaft 212 to rotate freely relative to the air pipe 211 while maintaining the air passage in a sealed state to prevent gas leakage. One end of the floating air pump 206 is provided with an air pipe 211, which is used to transmit compressed gas. One end of the air pipe 211 is connected to the rotating connector 210 through a connecting joint 227. The connecting joint 227 realizes a detachable sealed connection between the air pipe 211 and the rotating connector 210, which facilitates the maintenance and replacement of the pipeline in the future.

[0024] In this embodiment, the angle adjustment component is electrically connected to an external control terminal. The external control terminal sends an angle adjustment command to the angle adjustment component based on the three-dimensional model data of the propeller surface. The angle adjustment component drives the adjustment arm 207 and the polishing arm 202 to rotate to a preset angle, aligning the polishing head 201 with the area to be polished. Subsequently, the external control terminal sends an inflation command to the floating air pump 206. The floating air pump 206 starts and outputs compressed gas. The gas sequentially passes through the air pipe 211, the connecting connector 227, and the rotating connector 210 into the connecting air passage 209, and finally enters the airbag 20 through subsequent air passages. 5. Inside the airbag 205, the air pressure sensor collects air pressure data in real time and transmits it to the external control terminal. The external control terminal controls the operation of the floating air pump 206 according to the preset grinding pressure parameters. When the air pressure reaches the preset value, the floating air pump 206 stops inflating and maintains the pressure. When the resistance of the grinding head 201 changes during the grinding process, causing the volume of the airbag 205 to change, the air pressure sensor detects the air pressure fluctuation. The external control terminal will promptly control the floating air pump 206 to replenish or the valve to discharge gas, maintaining the stability of the internal pressure of the airbag 205 and ensuring the consistency of the grinding pressure.

[0025] A connecting end 213 is provided at the bottom of the connecting shaft 212. The top of the floating shaft 203 is connected to the connecting end 213. A floating air passage 214 is opened at the top of the floating shaft 203. The connecting air passage 209 is coaxially connected with the floating air passage 214 to form a continuous gas transmission channel. A first mounting groove 215 is provided at the bottom of the connecting end 213. The first mounting groove 215 provides installation space for the airbag 205 and restricts the radial expansion of the airbag 205, so that the airbag 205 can only extend along the axial direction of the floating shaft 203. The airbag 205 is located in the first mounting groove 215, with one end connected to the connecting end 213 and the other end connected to the transmission sleeve 204. Floating air passages are opened on both sides of the floating shaft 203. The air outlet 216 is connected to 214. Two sets of air outlets 216 are symmetrically arranged. Each set of air outlets 216 is equipped with a one-way valve 217. The one-way valve 217 only allows gas to flow from the floating air passage 214 to the inside of the airbag 205, preventing gas backflow and ensuring stable internal pressure of the airbag 205. The top of the transmission sleeve 204 is provided with a sliding hole 218. The floating shaft 203 slides through the sliding hole 218 to provide linear sliding guidance for the transmission sleeve 204. The bottom of the floating shaft 203 is provided with a limiting circular plate 219. The radius of the limiting circular plate 219 is larger than the radius of the sliding hole 218, which limits the maximum downward sliding stroke of the transmission sleeve 204 and prevents the transmission sleeve 204 from slipping off the bottom of the floating shaft 203.

[0026] In this embodiment, the gas in the connecting airway 209 is connected to the floating airway 214. After entering the floating airway 214, the gas in the connecting airway 209 enters the airbag 205 through the one-way valves 217 of the two side air outlets 216. Under the constraint of the first mounting groove 215, the airbag 205 expands axially along the floating shaft 203. The transmission sleeve 204 slides with the floating shaft 203. The expanded airbag 205 pushes the transmission sleeve 204 to slide downward along the floating shaft 203, so that the grinding head 201 contacts the surface of the ship propeller for grinding. The downward pressure of the grinding head 201 is positively correlated with the air pressure in the airbag 205. Thus, the grinding pressure can be directly controlled by the change in air pressure, realizing stepless adjustment of the grinding pressure. The output power of the floating air pump 206 can be adjusted by adjusting the external control terminal, thereby adjusting the air pressure value inside the airbag 205. This can adapt to the polishing needs of different curvature surfaces and different material areas of the ship propeller. The internal air pressure sensor of 205 collects air pressure data in real time and transmits it to the external control terminal. The external control terminal compares the collected air pressure value with the preset grinding pressure threshold. When the air pressure is lower than the lower threshold, it controls the floating air pump 206 to continue inflating. When the air pressure reaches the upper threshold, it controls the floating air pump 206 to stop inflating and enter the pressure holding state. When the propeller surface undulates during grinding, causing the transmission sleeve 204 to move up and down and the volume of the airbag 205 to change, causing air pressure fluctuations, the external control terminal will adjust the inflation volume of the floating air pump 206 in real time to maintain the air pressure within the preset range and ensure the stability of the grinding pressure. When the transmission sleeve 204 slides down to the maximum stroke, the bottom end of the transmission sleeve 204 contacts the top of the limit circular plate 219, preventing the transmission sleeve 204 from sliding down further. When the grinding operation is completed, the external control terminal controls the exhaust valve to exhaust, and the gas in the airbag 205 is discharged through the exhaust channel of the exhaust valve.

[0027] A grinding motor 220 is installed at the top of the adjusting arm 207. The grinding motor 220 is electrically connected to an external control terminal and receives start / stop and speed adjustment commands from the external control terminal to provide power for the rotational polishing of the grinding head 201. A first connecting seat 221 is provided at the adjacent end of the grinding arm 202 and the adjusting arm 207. Multiple sets of buffer pads 222 are provided between the two sets of first connecting seats 221. The multiple sets of buffer pads 222 are evenly distributed between the mating surfaces of the two sets of first connecting seats 221 to absorb the radial and axial vibrations generated during the grinding process and prevent the vibration from being transmitted to the adjusting arm 207 and the angle adjustment component. The two sets of first connecting seats 221 are connected by multiple sets of screws to ensure the connection strength between the grinding arm 202 and the adjusting arm 207. A first pulley 223 is provided on the outer side of the connecting shaft 212. The first pulley 223 is coaxially and fixedly connected to the connecting shaft 212. The main shaft of the grinding motor 220 is connected to the second pulley 224. The first pulley 223 and the second pulley 224 are connected by a belt 225. The belt 225 transmission can buffer the impact load during the start-up and operation process, and protect the grinding motor 220 and transmission components from damage. Two sets of bearings 226 are respectively provided between the two ends of the connecting shaft 212 and the grinding arm 202. The two sets of bearings 226 are respectively fixed on the inner walls of the two ends of the grinding arm 202, providing rotational support for the connecting shaft 212, reducing the frictional resistance during the rotation of the connecting shaft 212, and ensuring the coaxiality of the rotation of the connecting shaft 212.

[0028] In this embodiment, grinding is initiated via an external control terminal. The external control terminal first confirms that the internal air pressure of the airbag 205 has reached the preset grinding pressure value, then sends a start signal to the grinding motor 220, activating the grinding motor 220. The main shaft of the grinding motor 220 drives the second pulley 224 to rotate synchronously. The first pulley 223 and the second pulley 224 are connected by a belt 225, thereby transmitting rotational power to the first pulley 223, causing the first pulley 223 to rotate synchronously with the connecting shaft 212. 12 The floating shaft 203, transmission sleeve 204 and grinding head 201 are driven to rotate synchronously through the connecting end 213, so that the grinding head 201 rotates to polish the surface of the ship propeller. The bearing 226 supports the connecting shaft 212 to rotate smoothly in the grinding arm 202, avoiding radial wobble of the connecting shaft 212 and ensuring the rotational accuracy of the grinding head 201. During the grinding process, the external control terminal can adjust the output speed of the grinding motor 220 according to the polishing requirements of different areas of the propeller to adapt to different polishing process requirements.

[0029] The chip blowing assembly includes two sets of first movable plates 302. A second mounting groove 303 is provided on both sides of the transmission sleeve 204. Two sets of telescopic blowing heads 301 are respectively located within the two sets of second mounting grooves 303. Two sets of sliding brackets 304 are provided within the second mounting grooves 303. The sliding brackets 304 are fixedly connected to the inner wall of the second mounting groove 303, forming a sliding groove 305. The sliding groove 305 extends radially along the transmission sleeve 204. The two sets of first movable plates 302... Both sides are provided with first sliding blocks 306, and the two sets of first sliding blocks 306 are slidably connected to two sets of sliding grooves 305 respectively. One end of the sliding bracket 304 is provided with a limit block 307, which limits the maximum outward sliding stroke of the first moving plate 302 and prevents the first moving plate 302 from slipping out of the sliding groove 305. The bottom of the first moving plate 302 is provided with a connecting cylinder 308, which is arranged axially along the transmission sleeve 204. The top end of the telescopic air blowing head 301 is installed in the connecting cylinder 308. In this embodiment, when the first moving plate 302 is in the storage position, the telescopic blowing head 301 is located in the second mounting groove 303, and the first sliding block 306 is located in the sliding groove 305 at one end away from the limiting block 307; when the first moving plate 302 is in the blowing position, the telescopic blowing head 301 is completely located outside the second mounting groove 303, and the first sliding block 306 is in contact with the limiting block 307 in the sliding groove 305.

[0030] The first movable plate 302 and the connecting cylinder 308 are provided with a chip blowing air passage 309. The bottom end of the chip blowing air passage 309 is connected to the telescopic air blowing head 301, which delivers pressurized gas to the telescopic air blowing head 301 for ejection. The top end of the transmission sleeve 204 is provided with a connecting channel 310, and the top end of the connecting channel 310 is provided with a connecting air pipe 311. The connecting air pipe 311 adopts an elastic sealing structure, and its top end is sealed and connected to the bottom air port of the airbag 205, which leads the pressurized gas in the airbag 205 to the connecting channel 310. A reset rod 312 is provided on one side of the connecting cylinder 308. A reset spring 313 is sleeved on the reset rod 312 for resetting the first movable plate 302 from the chip blowing position to the storage position. The reset rod 312 is used to prevent the reset spring 313 from being compressed. During the contraction and extension process, radial displacement occurs. One end of the return spring 313 is connected to the inner wall of the second mounting groove 303, and the other end is connected to the connecting cylinder 308, providing an inward return force for the first moving plate 302. A sealing plate 314 is provided at the opening of the second mounting groove 303. The sealing plate 314 can prevent iron filings and dust generated during polishing from entering the interior of the second mounting groove 303. A first rotating seat 315 is provided at the top of the second mounting groove 303. The top of the sealing plate 314 is rotatably connected to the first rotating seat 315 through a rotating shaft. A flip-cover spring is provided in the first rotating seat 315 corresponding to the sealing plate 314. The flip-cover spring provides a continuous closing torque for the sealing plate 314, ensuring that the sealing plate 314 is always in the closed state when not in operation.

[0031] In this embodiment, when the first moving plate 302 is in the chip blowing position, the sealing plate 314 opens the second mounting groove 303 horizontally under the push of the first moving plate 302. The lower surface of the sealing plate 314 is in contact with the upper surface of the first moving plate 302, providing auxiliary support for the first moving plate 302. A dynamic sealing ring can be optionally provided at the top of the chip blowing airway 309, so that the top of the chip blowing airway 309 is sealed and aligned with the bottom of the connecting air pipe 311, allowing the gas in the airbag 205 to pass through the connecting airway 311. Air pipe 311, connecting channel 310, and chip blowing air passage 309 are ejected from telescopic air head 301 to blow chips from the polishing position; when the first moving plate 302 is in the storage position, the telescopic air head 301 is located in the second mounting groove 303, and the sealing plate 314 is vertically closed by the flip-cover spring to seal the opening of the second mounting groove 303. The top end of the chip blowing air passage 309 is completely misaligned and not connected with the bottom end of the connecting air pipe 311, blocking the air passage between the airbag 205 and the telescopic air head 301.

[0032] Specifically, the state switching of the chip blowing assembly is automatically linked to the operating state of the grinding motor 220, eliminating the need for additional drive components and control units. When the external control terminal sends a grinding start command and starts the grinding motor 220, the grinding motor 220 drives the transmission sleeve 204 to rotate synchronously. The rotating transmission sleeve 204 drives the first moving plate 302 and the telescopic air blowing head 301 to perform circular motion. As the rotational speed of the transmission sleeve 204 gradually increases, the centrifugal force on the first moving plate 302 and the telescopic air blowing head 301 gradually increases. When the centrifugal force exceeds the preload force of the return spring 313 and the closing force of the flip-top spring... At the same time, the first moving plate 302 slides along the sliding groove 305 to the outside of the transmission sleeve 204 via the first sliding block 306. During the sliding process, the first moving plate 302 pushes the closing plate 314 to rotate upward around the rotation axis, opening the opening of the second mounting groove 303. Until the first sliding block 306 contacts the limiting block 307, the first moving plate 302 stops sliding and reaches the chip blowing position. At this time, the telescopic air blowing head 301 is fully extended outside the second mounting groove 303 and faces the grinding area of ​​the grinding head 201. At the same time, the chip blowing air passage 309 at the top of the first moving plate 302 connects with the connecting channel 31 at the top of the transmission sleeve 204. Automatic alignment and connection are achieved. Gas inside the airbag 205 can enter the telescopic air blower 301 and be ejected through the connecting air pipe 311, connecting channel 310, and chip blowing air passage 309 to remove iron filings and dust generated at the grinding position in real time. During chip blowing, the external control terminal can adjust the output power of the floating air pump 206 to change the air pressure inside the airbag 205, thereby adjusting the intensity of the chip blowing airflow to adapt to different grinding conditions. When the external control terminal sends a grinding stop command and stops the grinding motor 220, the rotation speed of the transmission sleeve 204 gradually decreases, and the first moving plate 302 and the telescopic air blower... As the centrifugal force on the air head 301 gradually decreases, when the centrifugal force is less than the elastic force of the return spring 313, the return spring 313 pulls the connecting cylinder 308 and the first moving plate 302 to slide and reset along the sliding groove 305 towards the inside of the transmission sleeve 204. The telescopic air head 301 returns to the second mounting groove 303. At the same time, the sealing plate 314 flips downward around the rotation axis under the action of the flip-cover spring until the sealing plate 314 is in a vertical state and closes the opening of the second mounting groove 303. At this time, the chip blowing air passage 309 and the connecting channel 310 are completely misaligned and disconnected, blocking the air passage between the air bag 205 and the telescopic air head 301.

[0033] The angle adjustment assembly includes two sets of side plates 104, which are symmetrically arranged. A mounting plate 105 is provided between the two sets of side plates 104, and the two sides of the mounting plate 105 are fixedly connected to the two sets of side plates 104 respectively to form an overall frame structure. An angle adjustment shaft 106 is provided on one side of the mounting plate 105. The two ends of the angle adjustment shaft 106 pass through the two sets of side plates 104 respectively and are fixed to the bottom of the swing joint 103. An angle adjustment motor 107 is provided on the top of the swing joint 103. The angle adjustment motor 107 is electrically connected to an external control terminal and receives angle adjustment commands from the external control terminal. The main shaft of the angle adjustment motor 107 is connected to the angle adjustment shaft 106 through a gear transmission structure 108. The gear transmission structure 108 reduces the rotational power of the angle adjustment motor 107 and increases the torque before transmitting it to the angle adjustment shaft 106. 6. The mounting plate 105 and the two sets of side plates 104 are driven to rotate around the angle adjustment shaft 106. The angle adjustment assembly also includes an orientation adjustment motor 109, which is electrically connected to an external control terminal and receives rotation orientation adjustment commands from the external control terminal. A gearbox 110 is provided at the bottom of the mounting plate 105. The gearbox 110 provides a speed reduction and torque increase function for the orientation adjustment mechanism. An orientation adjustment motor 109 is provided at one end of the gearbox 110. The main shaft of the orientation adjustment motor 109 is connected to the input gear inside the gearbox 110. An orientation adjustment disk 111 is provided at the other end of the gearbox 110. The orientation adjustment disk 111 is coaxially and fixedly connected to the output gear inside the gearbox 110. One end of the adjustment arm 207 is fixedly connected to the orientation adjustment disk 111. The orientation adjustment disk 111 drives the adjustment arm 207 to rotate around its own axis.

[0034] In this embodiment, the sway joint 103 is rotatably connected to the angle adjustment shaft 106, enabling the pitch movement of the mounting plate 105 and the lower grinding assembly. The external control terminal pre-calculates the pitch angle and rotational orientation parameters corresponding to each area to be polished based on the three-dimensional model data of the ship's propeller. When the grinding head 201 moves above the area to be polished, the external control terminal sends an adjustment command to the angle adjustment motor 107, activating the motor. The angle adjustment motor 107 rotates the angle adjustment shaft 106 via the gear transmission structure 108. The angle adjustment shaft 106 is fixedly connected to the mounting plate 105 via the side plates 104 on both sides, thus causing the mounting plate 105, gearbox 110, orientation adjustment disc 111, adjustment arm 207, and the entire floating grinding assembly to rotate around the angle adjustment shaft 106, adjusting the pitch angle of the grinding head 201 so that the grinding head 201 is aligned with the propeller to be polished. The curved surface remains vertical. The gearbox 110 at the bottom of the mounting plate 105 is connected to the adjusting arm 207 via the orientation adjustment disc 111. When the circumferential orientation of the grinding head 201 needs to be adjusted, the external control terminal sends an adjustment command to the orientation adjustment motor 109 to start the orientation adjustment motor 109. The orientation adjustment motor 109 drives the orientation adjustment disc 111 to rotate through the gear transmission inside the gearbox 110. The orientation adjustment disc 111 drives the adjusting arm 207, the grinding arm 202, and the grinding head 201 to rotate around the axis of the orientation adjustment disc 111, adjusting the circumferential orientation of the grinding head 201 to adapt to the curved surface orientation of different positions of the propeller. An angle sensor is set on the mounting plate 105 corresponding to the orientation adjustment disc 111. The angle sensor is electrically connected to the external control terminal to collect the rotation angle data of the orientation adjustment disc 111 in real time and feed it back to the external control terminal to form a closed-loop control and ensure adjustment accuracy.

[0035] The support base 101 has two sets of hinge seats 112 on its top. The main cantilever 102 is rotatably connected to the two sets of hinge seats 112 on both sides via rotating shafts. The hinge seats 112 serve as the rotation fulcrum of the main cantilever 102, ensuring that the main cantilever 102 can smoothly pitch up and down around the rotating shaft. The support base 101 also has a second rotating seat 113 on its top, located behind the two sets of hinge seats 112. The top of the main cantilever 102 has a second connecting seat 114, and the top of the second rotating seat 113 has a hydraulic cylinder 115. The hydraulic cylinder 115 serves as the power actuator for the pitching movement of the main cantilever 102. The top of the hydraulic cylinder 115 is rotatably connected to the second connecting seat 114 via a connecting shaft. The support base 101 is equipped with a hydraulic drive device 116. The hydraulic drive unit 116 is electrically connected to an external control terminal and receives instructions from the external control terminal to complete the pressure regulation and flow control of the hydraulic oil. The hydraulic drive unit 116 integrates a hydraulic pump, a solenoid directional valve, a hydraulic oil tank, and a pressure sensor. The pressure sensor collects the pressure data of the hydraulic system in real time and transmits it to the external control terminal. The hydraulic cylinder 115 is connected to the hydraulic drive unit 116 through an oil pipe 117, which provides a transmission channel for the hydraulic oil. A counterweight end 118 is provided at the end of the main cantilever 102 away from the floating grinding component. The weight of the counterweight end 118 matches the total weight of the floating grinding component at the front end of the main cantilever 102, which is used to balance the torque at both ends of the main cantilever 102, reduce the load on the hydraulic cylinder 115, and improve the stability of the pitching motion of the main cantilever 102.

[0036] In this embodiment, the main cantilever 102 is hinged to the hinge seat 112 at the top of the support base 101. The hydraulic cylinder 115 at the top of the support base 101 is connected to the main cantilever 102 through the second connecting seat 114 to drive the main cantilever 102 to pitch up and down, adjusting the height of the grinding head 201. When it is necessary to adjust the working height of the grinding head 201, the external control terminal sends a height adjustment command to the hydraulic drive device 116 based on the three-dimensional model data of the ship propeller. The hydraulic drive device 116 controls the solenoid directional valve to switch, so that the pressurized oil enters the corresponding chamber of the hydraulic cylinder 115 through the oil pipe 117, pushing the piston rod of the hydraulic cylinder 115 to extend or retract. The main cantilever 102 rotates upward or downward around the hinge seat 112, thereby raising and lowering the floating grinding assembly at the front end and adjusting the grinding head 201 to the preset working height. An angle sensor is installed at the hinge shaft of the main cantilever 102. The angle sensor is electrically connected to an external control terminal to collect the pitch angle data of the main cantilever 102 in real time and feed it back to the external control terminal to ensure the accuracy of height adjustment. During the polishing operation, the external control terminal can adjust the extension and retraction of the hydraulic cylinder 115 in real time according to the height changes of different areas of the propeller, and adjust the height of the grinding head 201 so that the grinding head 201 always maintains a suitable contact distance with the propeller surface.

[0037] A dual-axis moving assembly is provided at the bottom of the support base 101. This assembly enables linear movement of the support base 101 and all its upper components in the horizontal plane along two orthogonal X and Y directions, covering the entire processing range of the ship propeller. The dual-axis moving assembly includes an X-axis adjusting base 119, which serves as the load-bearing component for X-axis movement. An X-axis adjusting screw 120 is provided at the top of the X-axis adjusting base 119, arranged along the X-axis direction. Both ends of the screw are rotatably connected to the X-axis adjusting base 119 via bearing seats. A first threaded sleeve 121 is provided at the bottom of the support base 101, which is fitted onto the X-axis adjusting screw 120 to control its rotational movement. To convert the linear motion of the support base 101 into linear motion, two sets of guide rods are arranged parallel to each other on both sides of the X-axis adjusting screw 120. The two sets of guide rods are fixedly connected to the brackets at both ends of the X-axis adjusting base 119. Two sets of third sliding blocks are provided at the bottom of the support base 101 corresponding to the two sets of guide rods. These third sliding blocks are slidably connected to the two sets of guide rods, providing guidance for the X-axis movement of the support base 101 and preventing tilting or swaying during movement. The dual-axis movement assembly also includes a Y-axis adjusting base 122 installed on the ground. The Y-axis adjusting base 122 is fixed to the workshop floor by anchor bolts. A Y-axis adjusting screw 123 is provided on the top of the Y-axis adjusting base 122. The Y-axis adjusting screw 123 moves along the Y-axis... The X-axis adjusting base 119 is rotatably connected to the Y-axis adjusting base 122 via bearing seats at both ends. Two sets of second movable plates 126 are symmetrically arranged on both sides of the bottom of the X-axis adjusting base 119. Sliding rails 125 are provided on both sides of the Y-axis adjusting base 122, with the two sets of sliding rails 125 arranged parallel to the Y-axis direction. A second sliding block 127 is provided on each adjacent side of the two sets of second movable plates 126, and the second sliding block 127 is slidably connected to the sliding rail 125, providing support and guidance for the Y-axis movement of the X-axis adjusting base 119. The bottom ends of both sets of second movable plates 126 are fixedly connected to a connecting plate 128, which is located between the two sets of second movable plates. Between plates 126, a second threaded sleeve 129 is provided on the connecting plate 128. The second threaded sleeve 129 is fitted onto the Y-axis adjusting screw 123, converting the rotational motion of the Y-axis adjusting screw 123 into the linear motion of the connecting plate 128 and the X-axis adjusting base 119. Both the X-axis adjusting base 119 and the Y-axis adjusting base 122 are equipped with drive motors on one side, namely the X-axis drive motor and the Y-axis drive motor, respectively. Both the X-axis drive motor and the Y-axis drive motor are electrically connected to an external control terminal to receive start / stop and speed adjustment commands from the external control terminal. The main shaft of the X-axis drive motor is connected to one end of the X-axis adjusting screw 120 through a coupling, and the main shaft of the Y-axis drive motor is connected to one end of the Y-axis adjusting screw 123 through a coupling.

[0038] In this embodiment, the support base 101 is connected to the X-axis adjusting screw 120 via the first threaded sleeve 121 for X-axis movement. Two sets of third sliding blocks are slidably connected to two sets of guide rods to ensure the straightness and stability of the X-axis movement of the support base 101. The X-axis adjusting base 119 is connected to the second threaded sleeve 129 via the second moving plate 126 and connecting plate 128. The second threaded sleeve 129 is connected to the Y-axis adjusting screw 123 for Y-axis movement. When it is necessary to adjust the position of the grinding head 201 in the horizontal plane, the external control terminal pre-calculates the X and Y axis coordinates corresponding to each area to be polished based on the three-dimensional model data of the ship's propeller, and sends a movement command to the corresponding drive motor. The X-axis drive motor then starts to drive the X-axis... When the adjusting screw 120 rotates, the first threaded sleeve 121 moves axially along the X-axis adjusting screw 120, causing the support base 101 to move linearly along the guide rod in the X-axis direction. The Y-axis drive motor starts and drives the Y-axis adjusting screw 123 to rotate. The second threaded sleeve 129 moves axially along the Y-axis adjusting screw 123, causing the connecting plate 128, the second moving plate 126, and the X-axis adjusting base 119 to move linearly along the sliding rail 125 in the Y-axis direction. The ends of the X-axis adjusting screw 120 and the Y-axis adjusting screw 123 are optionally equipped with rotary encoders. The rotary encoders are electrically connected to an external control terminal to collect the rotation angle data of the screws in real time and convert it into the actual position of the support base 101, which is then fed back to the external control terminal to form a closed-loop control.

[0039] The specific usage and function of this embodiment are as follows: In use, first fix the ship's propeller at the working position in front of the device, start the external control terminal and load the three-dimensional model data of the propeller to be polished. The external control terminal automatically plans the polishing path and process parameters based on the model data. Then, control the dual-axis moving assembly to adjust the initial position of the support base 101. The X-axis drive motor starts, driving the X-axis adjusting screw 120 to rotate. Through the first threaded sleeve 121, it drives the support base 101 to move linearly along the two sets of guide rods in the X-axis direction. The Y-axis drive motor starts, driving the Y-axis adjustment... The screw 123 rotates, driving the X-axis adjusting base 119 to move linearly along the sliding rails 125 on both sides of the Y-axis adjusting base 122 via the second threaded sleeve 129, connecting plate 128, and two sets of second moving plates 126. The rotary encoders at the ends of the X-axis adjusting screw 120 and the Y-axis adjusting screw 123 collect rotation angle data in real time and feed it back to the external control terminal. Simultaneously, the external control terminal sends a command to the hydraulic drive device 116, which then delivers pressurized oil to the hydraulic cylinder 115 through the oil pipe 117, pushing the hydraulic cylinder 115... 15. The piston rod extends and retracts, causing the main cantilever 102 to pitch and rotate around the two sets of hinge seats 112 on the top of the support base 101, adjusting the longitudinal height of the grinding head 201. The angle sensor at the hinge shaft of the main cantilever 102 collects and feeds back the pitch angle data in real time. The counterweight end 118 at the rear of the main cantilever 102 balances the weight of the front floating grinding component, reducing the load on the hydraulic cylinder 115. Then, the external control terminal sends a command to the angle adjustment component, and the angle adjustment motor 107 starts, driving the angle adjustment shaft 106 to rotate through the gear transmission structure 108, so that the mounting plate 1... 05 and the two sets of side plates 104 rotate around the angle adjustment shaft 106 to further adjust the pitch angle of the grinding head 201. The orientation adjustment motor 109 starts and drives the orientation adjustment disk 111 to rotate through the gearbox 110. This drives the adjustment arm 207 and the grinding arm 202 to rotate around the axis of the orientation adjustment disk 111, adjusting the circumferential orientation of the grinding head 201 so that the grinding head 201 is aligned with the area to be polished and remains perpendicular to the propeller surface. The angle sensor on the mounting plate 105 collects the rotation angle data of the orientation adjustment disk 111 in real time and feeds it back to ensure adjustment accuracy.

[0040] After the position adjustment is completed, the external control terminal sends an inflation command to the floating air pump 206. The compressed gas output by the floating air pump 206 passes sequentially through the air pipe 211, the connecting joint 227, and the rotating connector 210 into the connecting air passage 209 inside the connecting shaft 212. The dynamic sealing structure of the rotating connector 210 ensures that the air passage does not leak when the connecting shaft 212 rotates. The gas continues to pass through the floating air passage 214 inside the floating shaft 203 and the one-way valves 217 in the two side air outlets 216 into the airbag 205. The one-way valves 217 prevent gas backflow. The airbag 205 is connected... Under the constraint of the first mounting groove 215 at the bottom of the connector 213, the shaft expands axially along the floating shaft 203, pushing the transmission sleeve 204 to slide downward along the floating shaft 203, so that the grinding head 201 contacts the propeller surface. The air pressure sensor inside the airbag 205 collects air pressure data in real time and transmits it to the external control terminal. When the air pressure reaches the preset grinding pressure value, the external control terminal controls the floating air pump 206 to stop inflating and enter the pressure holding state. The limiting circular plate 219 at the bottom of the floating shaft 203 limits the maximum downward sliding stroke of the transmission sleeve 204 to prevent the grinding head 201 from being pressed down excessively. Subsequently, the external control terminal sends a start signal to the grinding motor 220. The main shaft of the grinding motor 220 drives the second pulley 224 to rotate, which in turn drives the first pulley 223 and the connecting shaft 212 to rotate synchronously via the belt 225. The two sets of bearings 226 at both ends of the connecting shaft 212 provide rotational support to ensure coaxiality of rotation. The connecting shaft 212 drives the floating shaft 203, the transmission sleeve 204 and the grinding head 201 to rotate synchronously via the connecting end 213 to polish the surface of the propeller. Multiple sets of buffer pads 222 on the mating surfaces of the two sets of first connecting seats 221 between the grinding arm 202 and the adjusting arm 207 absorb the vibration generated during the grinding process and prevent the vibration from being transmitted to the upper components.After the grinding motor 220 starts, the transmission sleeve 204 drives the first moving plate 302 and the telescopic air head 301 to rotate synchronously. As the speed increases, the centrifugal force on the first moving plate 302 and the telescopic air head 301 gradually increases. When the centrifugal force is greater than the sum of the preload force of the return spring 313 and the closing force of the flip-cover spring, the first moving plate 302 slides outward along the sliding groove 305 formed by the sliding bracket 304 and the inner wall of the second mounting groove 303 through the first sliding blocks 306 on both sides. This pushes the closing plate 314 to rotate upward around the rotation axis of the first rotating seat 315, opening the opening of the second mounting groove 303, until the first sliding block 306 contacts the limiting block 307 at one end of the sliding bracket 304. When the first moving plate 302 reaches the chip blowing position, the telescopic air blowing head 301 extends completely out of the second mounting groove 303 and faces the grinding area. The top of the chip blowing air passage 309 inside the first moving plate 302 and the top of the transmission sleeve 204, the connecting channel 310 and the connecting air pipe 311 are automatically aligned and connected. The gas in the airbag 205 is sprayed out from the telescopic air blowing head 301 through the connecting air pipe 311, the connecting channel 310 and the chip blowing air passage 309 to blow away the iron chips and dust generated at the grinding position in real time. During the chip blowing process, the external control terminal can change the air pressure inside the airbag 205 by adjusting the output power of the floating air pump 206, thereby adjusting the chip blowing airflow intensity to adapt to the needs of different grinding conditions.

[0041] During the polishing process, the external control terminal dynamically adjusts the X and Y axis positions of the dual-axis moving component, the pitch height of the main cantilever 102, and the pitch angle and circumferential orientation of the angle adjustment component according to the pre-planned polishing path, so that the polishing head 201 moves continuously along the propeller surface. When the undulation of the propeller surface causes the resistance of the polishing head 201 to change, the airbag 205 automatically adapts by changing its own volume. After the air pressure sensor detects the air pressure fluctuation, the external control terminal controls the floating air pump 206 to replenish the gas or open the exhaust valve to discharge the excess gas in real time, so as to maintain the internal pressure of the airbag 205 and ensure consistent polishing pressure.

[0042] After all areas are polished, the external control terminal sends a polishing stop command to stop the polishing motor 220. The speed of the transmission sleeve 204 gradually decreases, and the centrifugal force on the first moving plate 302 and the telescopic air blower 301 gradually decreases. When the centrifugal force is less than the elastic force of the return spring 313, the return spring 313 pulls the connecting cylinder 308 and the first moving plate 302 along the sliding groove 305 to slide inward and reset along the return rod 312. The telescopic air blower 301 returns to the second mounting groove 303. At the same time, the sealing plate 314 flips downward under the action of the flip-cover spring, and closes the opening of the second mounting groove 303 in a vertical state. The chip blowing air passage 309 is displaced from the connecting air pipe 311, blocking the air passage and preventing iron filings and dust from entering the air passage and causing blockage. Then, the external control terminal controls the exhaust valve to open and discharge the gas in the air bag 205.

[0043] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A ship propeller polishing device, characterized in that, include: A support base with a main cantilever hinged to the top of the support base, one end of which is connected to a swing joint. A floating grinding assembly is rotatably connected to the bottom of a swing joint. The floating grinding assembly includes a grinding head and a grinding arm. The grinding arm is rotatably connected to the swing joint. A floating shaft is provided inside the grinding arm. A transmission sleeve is slidably sleeved on the floating shaft. A grinding head is provided at the bottom end of the transmission sleeve. An air bladder is provided between the transmission sleeve and the floating shaft. Gas is introduced into the air bladder to push the transmission sleeve to move on the floating shaft to push out the grinding head, thereby realizing floating grinding. The chip blowing assembly is mounted on the grinding arm. The chip blowing assembly includes a telescopic air head located in either the storage position or the chip blowing position. Telescopic air heads are provided on both sides of the transmission sleeve. When the telescopic air head is in the chip blowing position, the air bladder is connected to the telescopic air head, and the gas in the air bladder is blown out from the telescopic air head to blow away the chips. When the telescopic air head is in the storage position, the air bladder is not connected to the telescopic air head, and the telescopic air head is located inside the transmission sleeve to seal the air passage.

2. The ship propeller polishing device according to claim 1, characterized in that: The floating polishing assembly also includes a floating air pump. One end of the polishing arm is connected to the adjusting arm, and the swing joint is connected to the other end of the adjusting arm through the angle adjusting assembly. A floating air pump is provided on the top of the adjusting arm. The top of the floating shaft is connected to the connecting shaft. The top of the connecting shaft has a connecting air passage. The top of the connecting air passage has a rotating connector. One end of the floating air pump has an air pipe. One end of the air pipe is connected to the rotating connector through a connecting joint.

3. The ship propeller polishing device according to claim 2, characterized in that: The bottom end of the connecting shaft is provided with a connecting end, the top end of the floating shaft is connected to the connecting end, the top end of the floating shaft is provided with a floating air passage, the connecting air passage is connected to the floating air passage, the bottom of the connecting end is provided with a first mounting groove, the airbag is located in the first mounting groove and one end is connected to the connecting end, and the other end is connected to the transmission sleeve. Both sides of the floating shaft are provided with air outlets that communicate with the floating air passage, and both sets of air outlets are provided with one-way valves. The top end of the transmission sleeve is provided with a sliding hole, the floating shaft slides through the sliding hole, and the bottom end of the floating shaft is provided with a limiting circular plate, the radius of which is larger than the radius of the sliding hole.

4. The ship propeller polishing device according to claim 2, characterized in that: A grinding motor is installed at the top of the adjusting arm. A connecting seat is installed at the end of the grinding arm adjacent to the adjusting arm. Multiple sets of buffer pads are installed between the two sets of connecting seats. The two sets of connecting seats are connected by multiple sets of screws. A first pulley is installed on the outside of the connecting shaft. The main shaft of the grinding motor is connected to a second pulley. The first pulley and the second pulley are connected by a belt. Two sets of bearings are installed at both ends of the connecting shaft and between the grinding arm.

5. A ship propeller polishing device according to claim 2, characterized in that: The chip blowing assembly includes two sets of movable plates. The transmission sleeve has mounting slots on both sides. Two sets of telescopic blowing heads are located in the two sets of mounting slots respectively. Two sets of sliding brackets are provided in the mounting slots. The sliding brackets and the inner wall of the mounting slots form sliding grooves. Sliding blocks are provided on both sides of the two sets of movable plates. The two sets of sliding blocks are slidably connected to the two sets of sliding grooves respectively. A limit block is provided at one end of the sliding bracket. A connecting cylinder is provided at the bottom of the movable plate. The top of the telescopic blowing head is installed in the connecting cylinder. When the movable plate is in the storage position, the telescopic air head is located in the mounting groove, and the sliding block is located in the sliding groove at the end away from the limit block. When the moving plate is in the chip blowing position, the telescopic air blowing head is outside the mounting groove, and the sliding block is in contact with the limit block inside the sliding groove.

6. A ship propeller polishing device according to claim 5, characterized in that: The movable plate and the connecting cylinder are provided with a chip blowing air passage. The bottom end of the chip blowing air passage is connected to the telescopic air blowing head. The top end of the transmission sleeve is provided with a connecting channel. The top end of the connecting channel is provided with a connecting air pipe. The top end of the connecting air pipe is connected to the air bag. A reset rod is provided on one side of the connecting cylinder. A reset spring is sleeved on the reset rod to reset the moving plate from the chip blowing position to the storage position. One end of the reset spring is connected to the inner wall of the first mounting groove, and the other end is connected to the connecting cylinder.

7. A ship propeller polishing device according to claim 6, characterized in that: A closing plate is provided at the opening of the first mounting slot, and a rotating seat is provided at the top of the first mounting slot. The top of the closing plate is rotatably connected to the rotating seat through a rotating shaft, and a flip-cover spring is provided inside the rotating seat corresponding to the closing plate. When the moving plate is in the chip blowing position, the sealing plate opens the first mounting slot in a horizontal position, and the top of the chip blowing air passage is connected to the connecting air pipe. The gas in the airbag is ejected from the telescopic blowing head through the connecting air pipe and the chip blowing air passage. When the movable plate is in the storage position, the telescopic blowing head is located in the first mounting slot, the sealing plate vertically seals the first mounting slot, and the top of the chip blowing airway is not connected to the connecting air pipe.

8. A ship propeller polishing device according to claim 2, characterized in that: The angle adjustment assembly includes two sets of side plates, with a mounting plate between the two sets of side plates. An angle adjustment shaft is provided on one side of the mounting plate. The bottom end of the swing joint is rotatably connected to the angle adjustment shaft. An angle adjustment motor is provided on the top of the swing joint. The main shaft of the angle adjustment motor is connected to the angle adjustment shaft through a gear transmission structure. The angle adjustment assembly also includes an orientation adjustment motor. A gearbox is provided at the bottom of the mounting plate. An orientation adjustment motor is provided at one end of the gearbox. The main shaft of the orientation adjustment motor is connected to the gearbox. An orientation adjustment disc is provided at the other end of the gearbox. One end of the adjustment arm is connected to the orientation adjustment disc.

9. A ship propeller polishing device according to claim 1, characterized in that: The support base has two sets of hinge seats on its top. The two sides of the main cantilever are rotatably connected to the two sets of hinge seats through rotating shafts. The support base also has a rotating seat on its top. The top of the main cantilever is equipped with a connecting seat. The top of the rotating seat is equipped with a hydraulic cylinder. The top of the hydraulic cylinder is rotatably connected to the connecting seat through a connecting shaft. The support base is equipped with a hydraulic drive device. The hydraulic cylinder and the hydraulic drive device are connected through oil pipes. The end of the main cantilever away from the floating grinding component is equipped with a counterweight end.

10. A ship propeller polishing device according to claim 9, characterized in that: The bottom of the support base is provided with a dual-axis moving assembly, which includes an X-axis adjusting base, an X-axis adjusting screw on the top of the X-axis adjusting base, and a first threaded sleeve on the bottom of the support base, which is fitted onto the X-axis adjusting screw. The dual-axis moving assembly also includes a Y-axis adjusting base installed on the ground. The top and bottom of the Y-axis adjusting base are provided with Y-axis adjusting screws. The bottom of the X-axis adjusting base is provided with two sets of moving plates. Sliding rails are provided on both sides of the Y-axis adjusting base. Sliding blocks are provided on the adjacent side of the two sets of moving plates. The sliding blocks are slidably connected to the sliding rails. The bottom ends of the two sets of moving plates are connected to a connecting plate. A second threaded sleeve is provided on the connecting plate. The second threaded sleeve is fitted onto the Y-axis adjusting screw.

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