Polishing apparatus for large marine propellers

Abstract

The application provides polishing equipment for large marine propellers, which comprises a base; a three-axis positioning mechanism is arranged on the top of the base, and a loading table is arranged on one side of the base; an angle adjusting part is installed on the side of the three-axis positioning mechanism close to the loading table, the angle adjusting part is connected with a shell cover, a rotary drive mechanism is installed in the shell cover, and an output part of the rotary drive mechanism is connected with an extension piece; a polishing head is installed on the extension piece, and the extension piece is connected with a lifting part; a blowing nozzle is arranged on the inner side of the bottom of the shell cover, the blowing nozzle is connected with a translation mechanism; and a self-opening and closing flap is arranged on the blowing nozzle. The polishing head can selectively enter or leave the bottom of the shell cover through the lifting part; during polishing, the polishing head extends from the bottom of the shell cover and is not blocked by the blowing nozzle inside the shell cover; after polishing, the polishing head is retracted into the bottom of the shell cover, and the polishing head is rotated, so that the debris attached to the surface of the polishing disc can be blown away through the blowing of the blowing nozzle.

Description

Technical Field

[0001] This invention relates to the field of propeller grinding technology, and particularly to grinding equipment for large marine propellers. Background Technology

[0002] As a core component of a ship's power system, the manufacturing precision of a marine propeller directly determines the ship's sailing efficiency, stability, and service life.

[0003] Currently, the grinding of large marine propellers is mostly done using multi-axis grinding machines. During the grinding process, the grinding head and the propeller blade surface experience high-speed friction, generating a large amount of metal shavings. These shavings easily adhere to the surface of the grinding disc on the grinding head. If the attached shavings are not cleaned in time, subsequent grinding operations will suffer from reduced grinding accuracy, scratches on the blade surface, and in severe cases, damage to the grinding head and propeller workpiece, thus affecting the overall processing quality.

[0004] In existing technologies, cleaning of grinding heads is mostly done manually. Specifically, after grinding, operators use a handheld air gun to blow air off the surface of the grinding head to remove attached debris. This manual cleaning method has significant drawbacks: low cleaning efficiency and a substantial increase in the labor intensity of operators; at the same time, manual cleaning poses certain safety hazards and cannot meet the requirements of efficient and safe grinding of large marine propellers.

[0005] Therefore, grinding equipment for large marine propellers is provided to address the above-mentioned problems. Summary of the Invention

[0006] This invention provides a grinding device for large marine propellers to solve the technical problem of the lack of self-cleaning in grinding heads.

[0007] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0008] This invention provides a grinding device for large marine propellers, including a base; a three-axis adjustment mechanism is provided on the top of the base, and a material carrier is provided on one side of the base; the material carrier is used to place the propeller workpiece; an angle adjustment part is installed on the side of the three-axis adjustment mechanism near the material carrier, the angle adjustment part is connected to a housing, a rotary drive mechanism is installed inside the housing, and the output part of the rotary drive mechanism is connected to a telescopic component; a grinding head is installed on the telescopic component, and a lifting part is connected to the telescopic component; the lifting part is used to drive the grinding head into or out of the bottom of the housing; an air nozzle is provided on the inner side of the bottom of the housing, and the air nozzle is connected to a translation mechanism; when the grinding head enters the bottom of the housing, the translation mechanism drives the air nozzle to approach the bottom side of the grinding head; a self-opening and closing flip cover is provided on the air nozzle.

[0009] Preferably, the lifting part includes a side frame and a driving component for driving the side frame to move up and down; the telescopic component includes a sleeve shaft rotatably connected to the side frame, a square hole is provided at the center of the sleeve shaft, and a square post is slidably fitted in the square hole, the top end of the square post is fixed to the output part of the rotary driving mechanism, and the bottom end of the sleeve shaft is fixed to the grinding head.

[0010] Preferably, the translation mechanism is located on one side of the bottom of the housing, and a base plate is fixedly installed inside the bottom of the housing; the translation mechanism includes a pulling part and a straight tube; a sleeve is slidably sleeved on the outside of the straight tube, and one end of the sleeve is fixedly connected to the air nozzle; a piston sleeve is fixedly sleeved on one end of the straight tube, and the outer ring of the piston sleeve cooperates with the inner wall of the sleeve; the other end of the straight tube is connected to an air blowing mechanism; the pulling part is installed on the base plate and is connected to the sleeve.

[0011] Preferably, the pulling part includes a carrier plate fixed to the inner side wall of the bottom of the shell; the carrier plate is rotatably mounted with a first winding wheel and a second winding wheel, and a rope is wound on the first winding wheel and the second winding wheel. One end of the rope is fixed with an end frame, and the end frame is fixed to the outer wall of the sleeve. The end frame is elastically connected to the outer wall of the shell by a third spring. The end of the rope away from the end frame is fixed with a sliding rod, and the sliding rod is slidably mounted on the base plate in a vertical direction.

[0012] Preferably, a pressure ring is provided below the slide rod, and the pressure ring is fixedly sleeved on the grinding head; the pressure ring moves with the grinding head into the bottom of the housing, and the pressure ring pushes the slide rod to drive the pulling part.

[0013] Preferably, a fixing plate is fixed on the bottom inner wall of the shell, the bottom of the flip cover is hinged to the fixing plate, and a reset component is installed between the flip cover and the fixing plate.

[0014] Preferably, the air blowing mechanism includes two air cylinder assemblies, which are respectively disposed on both sides of the telescopic member; the air inlet end and the air outlet end of the air cylinder assembly are respectively connected to a first air pipe and a second air pipe, the first air pipe is connected to an air inlet cover, and the air inlet cover is fixedly fitted with a filter, the second air pipe is connected to a connecting pipe, and the bottom end of the connecting pipe is connected to a straight pipe.

[0015] Preferably, the air cylinder assembly includes a cylinder body fixed inside a housing, a piston disc fitted inside the cylinder body, a pressure-bearing column fixed at the bottom of the piston disc, a second spring provided at the top of the piston disc, and a first one-way valve and a second one-way valve installed at the top of the cylinder body, the first one-way valve and the second one-way valve being connected to a first air pipe and a second air pipe, respectively.

[0016] Preferably, a pressure plate is provided below the pressure column, and the pressure plate is fixedly sleeved on the telescopic member; the top of the pressure plate is provided with an inclined surface.

[0017] Preferably, the air intake hood is disposed on the outer side wall of the housing, and a dust-blocking mechanism is provided at the air intake hood; the dust-blocking mechanism includes a baffle strip fixed to the bottom of the air intake hood, a baffle cover disposed above the baffle strip, one side of the baffle cover being attached to the outer side wall of the housing, a movable rod fixed to the baffle cover, the movable rod being vertically slidably mounted on the housing, one side of the movable rod extending into the housing, a fixing plate fixed to the movable rod, the fixing plate being elastically connected to the top inner wall of the housing through a first spring, and the end of the movable rod away from the baffle cover being located above the side frame.

[0018] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0019] The positive and progressive effects of this invention are as follows:

[0020] The aforementioned grinding equipment for large marine propellers allows the grinding head to selectively enter or exit the bottom of the housing via a lifting mechanism. During grinding, the grinding head extends from the bottom of the housing, unobstructed by the air nozzle inside, ensuring smooth grinding. After grinding, the grinding head retracts into the bottom of the housing, aligning with the air nozzle. The air nozzle, combined with the rotation of the grinding head, blows air to thoroughly remove debris from the surface of the grinding disc, preventing debris residue from affecting the accuracy and efficiency of subsequent grinding processes. Furthermore, it eliminates the need for manual cleaning, reducing labor intensity, removing safety hazards associated with manual cleaning, and improving overall processing efficiency.

[0021] A translation mechanism is incorporated. During the cleaning of the grinding disc, this mechanism automatically moves the air nozzle closer to the bottom of the grinding head, ensuring effective cleaning. After cleaning, the mechanism resets the air nozzle. Simultaneously, the translation mechanism generates driving force through the upward compression of the pressure ring, eliminating the need for an external power source. The air nozzle features a self-opening and closing flip cover. In the non-cleaning state, the flip cover closes the air nozzle via the elasticity of the reset component, effectively preventing debris, dust, and other foreign objects generated during grinding from entering the air nozzle and avoiding blockage of the airflow channel, thus ensuring the stability of the airflow cleaning effect. During cleaning, the air nozzle automatically pushes the flip cover open as it approaches the grinding head, requiring no additional control mechanism. This simple structure further enhances the practicality and ease of maintenance of the equipment.

[0022] The dust-blocking mechanism installed at the air inlet hood of the air blowing mechanism can form a closed protection for the filter when the grinding disc is not clean, preventing the dust generated during grinding from adhering to the filter surface, preventing filter blockage, and ensuring smooth air intake of the air blowing mechanism. During cleaning, the dust-blocking mechanism is automatically opened by the squeezing of the side frame as the grinding head rises and falls, without affecting the normal air intake of the air blowing mechanism. It automatically closes after cleaning, requiring no manual operation, reducing the frequency of filter cleaning and reducing maintenance workload. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of one side of the movable frame of the present invention;

[0025] Figure 3 This is a schematic diagram of the bottom of the housing and the rotation drive mechanism of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A in the middle;

[0027] Figure 5 This is a schematic diagram of the internal structure of the housing of the present invention;

[0028] Figure 6 This is a schematic diagram of the lifting part, pressure plate, and telescopic component of the present invention;

[0029] Figure 7 This is a schematic diagram of the air blowing mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure inside one side of the housing of the present invention;

[0031] Figure 9 For the present invention Figure 8 Enlarged structural diagram of section B in the middle;

[0032] Figure 10 This is a schematic diagram of the structure of the pulling part and the blowing nozzle of the present invention;

[0033] Figure 11 This is a schematic diagram of the dust-blocking mechanism and side frame of the present invention;

[0034] Figure 12 For the present invention Figure 11 Enlarged structural diagram of section C.

[0035] Explanation of reference numerals in the attached figures

[0036] 1. Base; 2. Three-axis adjustment mechanism; 201. X-axis guide rail; 202. Movable seat; 203. Z-axis guide rail; 204. Movable frame; 205. Y-axis slide; 3. Angle adjustment part; 4. Housing; 401. Base plate; 402. Hole and slot; 5. Grinding head; 501. Grinding disc; 502. Pressure ring; 6. Rotary drive mechanism; 601. First motor; 602. First pulley; 603. Transmission belt; 604. Second pulley; 7. Lifting unit; 701. Mounting base; 702. Second motor; 703. Stud; 704. Movable block; 705. Guide post; 706. Side frame; 7061. Through hole; 8. Protective cover; 9. Dustproof mechanism; 901. Movable rod; 902. Cover; 903. Baffle bar; 904. Fixed plate; 905. First spring; 10. Air blowing mechanism; 1001. Cylinder; 100 2. Pressure-bearing column; 1003. First one-way valve; 1004. Second one-way valve; 1005. First air pipe; 1006. Second air pipe; 1007. Connecting pipe; 1008. Air inlet hood; 1009. Filter; 1010. Piston disc; 1011. Second spring; 1012. Mounting bracket; 1013. Side seat; 11. Pressure plate; 1101. Inclined surface; 12. Telescopic component; 1201. Sleeve shaft; 1202, Square column; 13, Air nozzle; 1301, Sleeve; 14, Straight tube; 1401, Piston sleeve; 15, Pulling part; 1501, Carrier plate; 1502, First winding wheel; 1503, Second winding wheel; 1504, Rope; 1505, Sliding rod; 1506, End frame; 1507, Third spring; 16, Flip cover; 1601, Fixing plate; 17, Material platform; 18, Propeller workpiece. Detailed Implementation

[0037] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0038] like Figures 1-12 As shown, a grinding device for large marine propellers includes a base 1.

[0039] The base 1 is provided with a three-axis adjustment mechanism 2 on its top, and a material carrier 17 is provided on one side of the base 1. The material carrier 17 is used to place the propeller workpiece 18. The material carrier 17 is provided with a clamp for clamping and fixing the propeller workpiece 18. The clamp is connected to a motor with positioning or braking to drive the propeller workpiece 18 to rotate and adjust, so that the blades at different positions around it can be moved to one side of the grinding head 5, so as to facilitate the grinding of the blades at each position.

[0040] An angle adjustment part 3 is installed on the side of the three-axis adjustment mechanism 2 near the loading platform 17. The angle adjustment part 3 is connected to a housing 4. A rotary drive mechanism 6 is installed inside the housing 4, and the output part of the rotary drive mechanism 6 is connected to a telescopic member 12. A grinding head 5 is installed on the telescopic member 12. A grinding disc 501 is provided at the bottom of the grinding head 5, and a lifting part 7 is connected to the telescopic member 12. The lifting part 7 is used to drive the grinding head 5 into or out of the bottom of the housing 4. The angle adjustment part 3 can be a motor with positioning or braking to adjust the grinding angle of the grinding head 5, which is suitable for grinding operations at different tilt angle positions on the propeller workpiece 18.

[0041] An air nozzle 13 is provided on the inner side of the bottom of the housing 4, and the air nozzle 13 is connected to a translation mechanism; the grinding head 5 enters the bottom of the housing 4, and the translation mechanism drives the air nozzle 13 to approach the bottom side of the grinding head 5.

[0042] The air nozzle 13 is provided with a self-opening and closing flip cover 16.

[0043] When grinding the propeller workpiece 18, the loading table 17 clamps and places the propeller workpiece 18, and drives the propeller workpiece 18 to rotate and adjust so that one of its blades is located on one side of the base 1. The grinding head 5 is moved to various parts of the blade by the three-axis adjustment mechanism 2, and the telescopic member 12 and the grinding head 5 are rotated together by the rotation drive mechanism 6 to achieve grinding of various parts of the blade. When grinding at different tilt angles, the grinding angle of the grinding head 5 is adjusted by the angle adjustment part 3. After grinding a single blade, the blades at other positions of the propeller workpiece 18 are rotated to one side of the base 1. The above operation is repeated to complete the grinding of all blades.

[0044] During the aforementioned polishing process, the polishing head 5 extends from the bottom of the housing 4. After polishing, when cleaning the polishing disc 501 at the bottom of the polishing head 5, the polishing head 5 is retracted into the bottom of the housing 4, with one side of the polishing disc 501 at the bottom of the polishing head 5 aligned with the air nozzle 13. The translation mechanism moves the air nozzle 13 closer to the polishing disc 501, bringing it close to the bottom side of the polishing head 5. The flip cover 16 is then opened, removing the seal on the air nozzle 13. The air nozzle 13 blows air while simultaneously driving the polishing head 5 to rotate, providing airflow to clean all areas around the polishing disc 501 and removing any attached debris.

[0045] Through the above design, the grinding disc 501 is cleaned after grinding, preventing debris from affecting the next grinding process. During grinding, the grinding head 5 extends from the housing 4, unobstructed by the air nozzle 13 (located inside the bottom of the housing 4), thus ensuring the grinding operation of the grinding head 5 is not affected. When cleaning is needed, the grinding head 5 moves inside the housing 4, aligning with and approaching the air nozzle 13, ensuring direct airflow and thus guaranteeing a cleaning effect. Furthermore, after cleaning, the flip cover 16 automatically closes, automatically sealing the air nozzle 13 and only opening it again for the next airflow cleaning, preventing the entry of foreign objects when not in use, and thus preventing interference with the next airflow cleaning.

[0046] like Figure 1 As shown, the three-axis adjustment mechanism 2 includes an X-axis guide rail 201 fixed to the top surface of the base 1; a movable seat 202 is slidably mounted on the X-axis guide rail 201, an X-axis linear module is disposed below the movable seat 202, a Z-axis guide rail 203 is fixedly mounted on the top surface of the movable seat 202, a movable frame 204 is slidably mounted on the Z-axis guide rail 203, a Z-axis linear module is disposed below the movable frame 204, a Y-axis slide block 205 is slidably mounted vertically on the side of the movable frame 204 near the loading platform 17, and a Y-axis linear module is disposed between the Y-axis slide block 205 and the movable frame 204. The angle adjustment part 3 is fixed to one side of the Y-axis slide block 205.

[0047] The X-axis linear module is used to move and adjust the movable seat 202 and its structure in the X-axis direction. The Z-axis linear module is used to move and adjust the movable frame 204 and its structure in the Z-axis direction. The Y-axis linear module is used to move and adjust the Y-axis slide 205 and its structure in the Y-axis direction. Through the above-mentioned three-axis adjustment mechanism 2, the grinding head 5 is adjusted in three directions.

[0048] Among them, the X-axis linear module, Z-axis linear module and Y-axis linear module can all adopt the linear modules in the existing technology.

[0049] like Figure 3 , Figure 5 as well as Figure 6 As shown, the rotary drive mechanism 6 includes a first pulley 602 and a second pulley 604 rotatably mounted on the inner wall of the top of the housing 4. A transmission belt 603 is wound between the first pulley 602 and the second pulley 604. A first motor 601 is fixedly mounted on the outer wall of the top of the housing 4. The output shaft of the first motor 601 is fixedly connected to the first pulley 602.

[0050] The rotary drive mechanism 6 is used to drive the telescopic member 12 and the grinding head 5 to rotate together. Its specific operation is as follows: the first motor 601 drives the first pulley 602 to rotate, which is transmitted through the transmission belt 603, causing the second pulley 604 to rotate. The second pulley 604 is the output part of the rotary drive mechanism 6, which drives the telescopic member 12 and the grinding head 5 to rotate.

[0051] like Figures 5-6 As shown, the lifting unit 7 includes a side frame 706 and a driving component for driving the side frame 706 to move up and down; the driving component includes a mounting base 701 fixed to the housing 4, a second motor 702 fixedly mounted on the top of the mounting base 701, a stud 703 rotatably mounted inside the mounting base 701, and the stud 703 fixed to the output shaft of the second motor 702; a guide post 705 is also fixed inside the mounting base 701, and a live thread is threaded onto the stud 703. The movable block 704 has a guide hole, which is slidably connected to the guide post 705. The movable block 704 is fixed to the side frame 706. The telescopic member 12 includes a sleeve shaft 1201 rotatably connected to the side frame 706. A square hole is opened at the center of the sleeve shaft 1201, and a square post 1202 is slidably fitted into the square hole. The top end of the square post 1202 is fixed to the output part of the rotary drive mechanism 6, and the bottom end of the sleeve shaft 1201 is fixed to the grinding head 5.

[0052] The driving component in the lifting unit 7 drives the sleeve shaft 1201 to move up and down via the side frame 706, causing the telescopic component 12 to extend and retract while simultaneously driving the grinding head 5 into or out of the bottom of the housing 4. The extension and retraction of the telescopic component 12 is achieved by sliding the square post 1202 against the square hole. With this design, the grinding head 5 can be driven by the rotary drive mechanism 6 to rotate whether it enters or leaves the bottom of the housing 4.

[0053] The working process of the drive component is as follows: the second motor 702 drives the stud 703 to rotate, the stud 703 and the movable block 704 are driven by thread, and the sliding guide of the guide hole and the guide post 705 makes the movable block 704 drive the side frame 706 to move up and down.

[0054] like Figures 8-10 As shown, the translation mechanism is located on one side of the bottom of the housing 4, and a base plate 401 is fixedly installed inside the bottom of the housing 4; the translation mechanism includes a pulling part 15 and a straight tube 14; a sleeve 1301 is slidably sleeved on the outside of the straight tube 14, and one end of the sleeve 1301 is fixedly connected to the air nozzle 13; a piston sleeve 1401 is fixedly sleeved on one end of the straight tube 14, and the outer ring of the piston sleeve 1401 cooperates with the inner wall of the sleeve 1301; the other end of the straight tube 14 is connected to an air blowing mechanism 10; the pulling part 15 is installed on the base plate 401, and the pulling part 15 is connected to the sleeve 1301.

[0055] The pulling part 15 is used to pull the sleeve 1301 to slide outside the straight tube 14, so that the sleeve 1301 and the air nozzle 13 move together to move closer to the bottom side of the grinding head 5 or return to a position away from the grinding head 5.

[0056] like Figure 10 As shown, the pulling part 15 includes a carrier plate 1501 fixed to the inner sidewall of the bottom of the housing 4; a first winding wheel 1502 and a second winding wheel 1503 are rotatably mounted on the carrier plate 1501, and a rope 1504 is wound on the first winding wheel 1502 and the second winding wheel 1503. Holes are provided on the bottom plate 401 and the bottom sidewall of the housing 4, and the rope 1504 passes through the holes on the bottom plate 401 and the bottom sidewall of the housing 4. The rope body 1504 has an end bracket 1506 fixed at one end, and the end bracket 1506 is fixed to the outer wall of the sleeve 1301. The end bracket 1506 is elastically connected to the outer wall of the shell 4 by a third spring 1507. The two ends of the third spring 1507 are fixed to the end bracket 1506 and the outer wall of the shell 4, respectively. The end of the rope body 1504 away from the end bracket 1506 is fixed with a sliding rod 1505, and the sliding rod 1505 is vertically slidably installed on the base plate 401. Specifically, the vertical sliding installation is achieved by the sliding rod 1505 slidingly engaging with the guide groove opened on the base plate 401.

[0057] like Figures 8-9 As shown, a pressure ring 502 is provided below the slide rod 1505, and the pressure ring 502 is fixedly sleeved on the grinding head 5; the pressure ring 502 moves with the grinding head 5 into the bottom of the housing 4, and the pressure ring 502 pushes the slide rod 1505 to drive the pulling part 15.

[0058] like Figure 3 and Figure 5 In the indicated state, the grinding head 5 extends from the bottom of the housing 4. At this time, the pressure ring 502 and the bottom end of the slide rod 1505 are separated, with a gap between them. Subsequently, the grinding head 5 is moved inward to the bottom of the housing 4, causing the grinding head 5 to move along with the pressure ring 502. The top surface of the pressure ring 502 then comes into contact with the bottom end of the slide rod 1505 (as shown). Figures 8-9 (As shown), the grinding head 5 continues to move along with the pressure ring 502 until the grinding disc 501 is level with the air nozzle 13. During this process, the pressure ring 502 pushes the slide rod 1505 to move, and the slide rod 1505 pulls the rope 1504. The rope 1504, through the end bracket 1506, drives the sleeve 1301 and the air nozzle 13 closer to the grinding head 5, so that the air nozzle 13 is close to the bottom side of the grinding disc 501 and compresses the third spring 1507. After the above operations, the grinding head 5 rotates, and the air nozzle 13 blows air to clean the bottom surface of the grinding disc 501.

[0059] After cleaning, the grinding head 5 extends from the bottom of the housing 4, the pressure ring 502 releases the pressure on the slide rod 1505, and the elastic force of the third spring 1507 resets the air nozzle 13 and the sleeve 1301. The sleeve 1301 then pulls the rope 1504 via the end bracket 1506, which in turn pulls the slide rod 1505, resetting it. The translation mechanism and the air nozzle 13 then return to their original positions. Figure 9 The state shown.

[0060] With the above design, when the grinding head 5 enters the bottom of the housing 4 for cleaning, the translation mechanism automatically moves the air nozzle 13 close to the grinding disc 501 by means of the squeezing force of the pressure ring 502, ensuring the cleaning effect of air blowing; when the grinding head 5 leaves the bottom of the housing 4, the air nozzle 13 is reset by the reset force of the third spring 1507; the approach and reset movements of the air nozzle 13 do not require an additional power source.

[0061] During the translational movement of the air nozzle 13, the sleeve 1301 slides against the straight tube 14, and the piston sleeve 1401 always engages with the inner wall of the sleeve 1301, ensuring that the air nozzle 13 is always connected to the air blowing mechanism 10 through the straight tube 14. The design of the sleeve 1301, the straight tube 14, and the piston disc 1010 is suitable for the translational movement of the air nozzle 13.

[0062] In practical implementation, in order to reduce the friction between the pressure ring 502 and the bottom end of the slide rod 1505, a ball bearing can be provided at the bottom end of the slide rod 1505; when the grinding head 5 rotates, the pressure ring 502 and the bottom end of the slide rod 1505 undergo rolling friction to reduce friction and wear.

[0063] The base plate 401 has a hole or groove 402, such as Figure 8 As shown, the slot 402 is used for the top of the grinding head 5 and the telescopic member 12 to pass through, without affecting the movement of the grinding head 5 into or out of the housing 4.

[0064] like Figures 9-10 As shown, a fixing plate 1601 is fixed on the bottom inner wall of the housing 4, and the bottom of the flip cover 16 is hinged to the fixing plate 1601. A reset member is installed between the flip cover 16 and the fixing plate 1601. The reset member can be a torsion spring.

[0065] like Figure 9 In this state, the flip cover 16 covers one side of the air nozzle 13, blocking it. As the air nozzle 13 approaches the grinding head 5, it pushes against the flip cover 16, causing it to flip and twist the reset mechanism. The air nozzle 13 then moves away from the flip cover 16, automatically opening and resetting. Figure 9 In this state, the flip cover 16 is reset by the reset component, and the air nozzle 13 is resealed.

[0066] The bottom surface of the sleeve 1301 is flush with the bottom of the air nozzle 13. After the air nozzle 13 leaves the flip cover 16, it is blocked by the bottom surface of the sleeve 1301 contacting the flip cover 16.

[0067] like Figures 5-9 As shown, the air blowing mechanism 10 includes two air cylinder assemblies, which are respectively disposed on both sides of the telescopic member 12. The air inlet and outlet ends of the air cylinder assemblies are respectively connected to a first air pipe 1005 and a second air pipe 1006. The first air pipe 1005 is connected to an air inlet cover 1008, and the air inlet cover 1008 is fixedly fitted with a filter 1009. The second air pipe 1006 is connected to a connecting pipe 1007, and the bottom end of the connecting pipe 1007 is connected to a straight pipe 14.

[0068] like Figure 9 As shown, a protective cover 8 is fixed on the bottom outer wall of the housing 4; the bottom end of the connecting pipe 1007 and the sleeve 1301 are both located inside the protective cover 8, and are protected by the protective cover 8.

[0069] like Figures 7-8 As shown, the air cylinder assembly includes a cylinder 1001 fixed inside the housing 4. A piston disc 1010 is fitted inside the cylinder 1001, and a pressure-bearing column 1002 is fixed at the bottom of the piston disc 1010. The pressure-bearing column 1002 cooperates with a hole opened at the bottom of the cylinder 1001 to guide the movement of the pressure-bearing column 1002. A second spring 1011 is provided at the top of the piston disc 1010, and the piston disc 1010 is elastically connected to the inner wall of the top of the cylinder 1001 through the second spring 1011. A first one-way valve 1003 and a second one-way valve 1004 are installed at the top of the cylinder 1001. The first one-way valve 1003 and the second one-way valve 1004 are respectively the air inlet and air outlet of the air cylinder assembly. The first one-way valve 1003 and the second one-way valve 1004 are respectively connected to the first air pipe 1005 and the second air pipe 1006. The cylinders 1001 of the two air cylinder assemblies are respectively fixed with mounting brackets 1012 and side seats 1013, and the two cylinders 1001 are fixed inside the housing 4 by the mounting brackets 1012 and side seats 1013.

[0070] like Figure 5 as well as Figure 8 As shown, a pressure plate 11 is provided below the pressure column 1002, and the pressure plate 11 is fixedly sleeved on the sleeve shaft 1201 of the telescopic member 12; the top of the pressure plate 11 is provided with an inclined surface 1101.

[0071] like Figure 5As shown, when the grinding head 5 extends from the bottom of the housing 4, there is a gap between the pressure plate 11 and the pressure column 1002; when the grinding head 5 moves into the bottom of the housing 4, so that the grinding plate 501 is flush with the air nozzle 13, the inclined surface 1101 of the pressure plate 11 abuts against the pressure column 1002 of the two air cylinder assemblies; when the grinding plate 501 is cleaning, the grinding head 5 and the telescopic component 12 rotate together, and the telescopic component 12 drives the pressure plate 11 to rotate together. The pressure plate 11 squeezes the pressure column 1002 of the two air cylinder assemblies through the inclined surface 1101, so that the two air cylinder assemblies alternately blow air into the straight pipe 14 and replenish air.

[0072] Specifically, such as Figure 8 As shown, the inclined surface 1101 on the pressure plate 11 has one side lower than the other. The pressure column 1002 of the air cylinder assembly gradually changes from contact with the lower part of the inclined surface 1101 to contact with the higher part. The pressure column 1002 is squeezed by the inclined surface 1101, and the pressure column 1002 drives the piston disc 1010 to move upward in the cylinder 1001. The piston disc 1010 squeezes the gas in the cylinder 1001 and compresses the second spring 1011, so that the gas enters the straight pipe 14 through the second one-way valve 1004, the second air pipe 1006 and the connecting pipe 1007, and then through the sleeve 1. 301 enters the air nozzle 13 and is blown out by the air nozzle 13; the pressure column 1002 of the air cylinder assembly gradually changes from the contact state with the high part of the inclined plane 1101 to the contact state with the low part. The spring force of the second spring 1011 causes the piston disc 1010 and the pressure column 1002 to move downward to reset. The cylinder 1001 draws in outside air to replenish it. The outside air is filtered by the filter 1009 and then enters the cylinder 1001 through the air inlet hood 1008, the connecting pipe 1007, the second air pipe 1006 and the second one-way valve 1004 to realize the replenishment of gas.

[0073] Two air cylinder assemblies are symmetrically arranged on both sides of the telescopic member 12. In one air cylinder assembly, the pressure column 1002 gradually changes from contact with the lower part of the inclined surface 1101 to contact with the higher part, while in the other air cylinder assembly, the pressure column 1002 gradually changes from contact with the higher part of the inclined surface 1101 to contact with the lower part, so as to realize the alternating replenishment and blowing of gas by the two.

[0074] With the above design, the pressure plate 11 rotates by means of the rotation of the grinding head 5 and the telescopic component 12, and further squeezes and drives the air blowing mechanism 10 through the inclined surface 1101 of the pressure plate 11, so that the air blowing mechanism 10 does not need to be equipped with an additional power source.

[0075] like Figure 6 As shown, a through hole 7061 is provided on the side frame 706, which is used for the passage of the air cylinder assembly; as Figure 8 As shown, the air cylinder assembly passes through the through hole 7061, and the up and down movement of the side frame 706 is not hindered by the air cylinder assembly.

[0076] like Figure 4 , Figure 8 , Figure 11 as well as Figure 12 As shown, the air intake hood 1008 is disposed on the outer side wall of the housing 4, and a dust-blocking mechanism 9 is provided at the air intake hood 1008; the dust-blocking mechanism 9 includes a baffle 903 fixed to the bottom of the air intake hood 1008, a cover 902 disposed above the baffle 903, one side of the cover 902 being attached to the outer side wall of the housing 4, and a movable rod 901 fixed to the cover 902, the movable rod 901 being vertically slidably mounted on the housing 4, and the movable rod 901 being inverted. The U-shaped movable rod 901 has one side passing through a hole opened to the top of the housing 4, and one side of the movable rod 901 extending inside the housing 4. A fixing plate 904 is fixed on the movable rod 901. The fixing plate 904 is elastically connected to the top inner wall of the housing 4 by a first spring 905. The two ends of the first spring 905 are fixed to the fixing plate 904 and the top inner wall of the housing 4, respectively. The end of the movable rod 901 away from the cover 902 is located above the side frame 706.

[0077] When the polishing disc 501 is not cleaned, the dust-blocking mechanism 9 is used to prevent dust from entering the filter 1009, so as to avoid foreign objects adhering to the surface and causing blockage (such as debris generated during polishing), and to prevent it from affecting the subsequent air intake of the filter.

[0078] When the grinding disc 501 needs cleaning, the side frame 706 of the lifting unit 7 drives the sleeve shaft 1201 and the grinding head 5 to move upward together, such as Figure 8 As shown, at this time, in addition to the pressure ring 502 contacting the slide rod 1505, the top surface of the side frame 706 is in contact with the end of the movable rod 901. When the side frame 706 continues to drive the grinding head 5 upward, the side frame 706 squeezes the movable rod 901. The movable rod 901 drives the cover 902 upward and compresses the first spring 905. The cover 902 separates from the baffle 903, canceling the dust-blocking effect on the filter 1009 at the air intake hood 1008. After cleaning, the side frame 706 drives the grinding head 5 to return to its original position and leave the bottom of the housing 4. The side frame 706 separates from the movable rod 901. The movable rod 901 returns to its original position due to the elastic force of the first spring 905. The movable rod 901 also drives the cover 902 to adhere to the baffle 903. The cover 902, the baffle 903, and the outer wall of the housing 4 form a protective and sealed cavity, providing dust protection for the filter 1009.

[0079] With the above design, when the grinding head 5 is being cleaned, the filter 1009 can automatically cancel the dust blocking function; after the grinding head 5 is being cleaned, the filter 1009 is automatically sealed to provide dust protection.

[0080] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A grinding device for large marine propellers, comprising a base (1); characterized in that: The base (1) is provided with a three-axis adjustment mechanism (2) on its top, and a loading platform (17) is provided on one side of the base (1); the loading platform (17) is used to place the propeller workpiece (18). The three-axis positioning mechanism (2) has an angle adjustment part (3) installed on the side near the loading platform (17). The angle adjustment part (3) is connected to a housing (4). A rotary drive mechanism (6) is installed inside the housing (4), and the output part of the rotary drive mechanism (6) is connected to a telescopic component (12). A grinding head (5) is installed on the telescopic component (12), and a lifting part (7) is connected to the telescopic component (12). The lifting part (7) is used to drive the grinding head (5) into or out of the bottom of the housing (4). An air nozzle (13) is provided on the inner side of the bottom of the housing (4), and the air nozzle (13) is connected to a translation mechanism; the grinding head (5) enters the bottom of the housing (4), and the translation mechanism drives the air nozzle (13) to approach the bottom side of the grinding head (5); The air nozzle (13) is provided with a self-opening and closing flip cover (16). The lifting part (7) includes a side frame (706) and a driving component for driving the side frame (706) to move up and down; the telescopic component (12) includes a sleeve shaft (1201) rotatably connected to the side frame (706), a square hole is provided at the center of the sleeve shaft (1201), and a square column (1202) is slidably fitted in the square hole. The top end of the square column (1202) is fixed to the output part of the rotary driving mechanism (6), and the bottom end of the sleeve shaft (1201) is fixed to the grinding head (5); the translation mechanism is provided on one side of the bottom of the housing (4), and the housing (4) A base plate (401) is fixedly installed at the bottom; the translation mechanism includes a pulling part (15) and a straight tube (14); a sleeve (1301) is slidably sleeved on the outside of the straight tube (14), and one end of the sleeve (1301) is fixedly connected to the air nozzle (13); a piston sleeve (1401) is fixedly sleeved on one end of the straight tube (14), and the outer ring of the piston sleeve (1401) is engaged with the inner wall of the sleeve (1301); the other end of the straight tube (14) is connected to an air blowing mechanism (10); the pulling part (15) is installed on the base plate (401), and the pulling part... (15) Connected to the sleeve (1301); the pulling part (15) includes a carrier plate (1501) fixed to the inner side wall of the bottom of the shell (4); the carrier plate (1501) is rotatably mounted with a first winding wheel (1502) and a second winding wheel (1503), a rope (1504) is wound on the first winding wheel (1502) and the second winding wheel (1503), one end of the rope (1504) is fixed with an end frame (1506), and the end frame (1506) is fixed to the outer wall of the sleeve (1301), and the end frame (1506) is fixed to the shell. (4) The outer walls are elastically connected by a third spring (1507). The end of the rope (1504) away from the end frame (1506) is fixed with a slide rod (1505), and the slide rod (1505) is slidably installed on the base plate (401) in the vertical direction. A pressure ring (502) is provided below the slide rod (1505), and the pressure ring (502) is fixedly sleeved on the grinding head (5). The pressure ring (502) moves with the grinding head (5) into the bottom of the shell (4), and the pressure ring (502) pushes the slide rod (1505) to drive the pulling part (15).

2. The grinding equipment for large marine propellers as described in claim 1, characterized in that: A fixing plate (1601) is fixed on the bottom inner wall of the cover (4), and the bottom of the flip cover (16) is hinged to the fixing plate (1601). A reset component is installed between the flip cover (16) and the fixing plate (1601).

3. The grinding equipment for large marine propellers as described in claim 1, characterized in that: The air blowing mechanism (10) includes two air cylinder assemblies, which are respectively disposed on both sides of the telescopic member (12); the air inlet end and the air outlet end of the air cylinder assembly are respectively connected to a first air pipe (1005) and a second air pipe (1006), the first air pipe (1005) is connected to an air inlet cover (1008), and the air inlet cover (1008) is fixedly fitted with a filter (1009), the second air pipe (1006) is connected to a connecting pipe (1007), and the bottom end of the connecting pipe (1007) is connected to a straight pipe (14).

4. The grinding equipment for large marine propellers as described in claim 3, characterized in that: The air cylinder assembly includes a cylinder (1001) fixed inside a housing (4), a piston disc (1010) fitted inside the cylinder (1001), a pressure-bearing column (1002) fixed at the bottom of the piston disc (1010), a second spring (1011) provided at the top of the piston disc (1010), a first one-way valve (1003) and a second one-way valve (1004) installed at the top of the cylinder (1001), and the first one-way valve (1003) and the second one-way valve (1004) are respectively connected to a first air pipe (1005) and a second air pipe (1006).

5. The grinding equipment for large marine propellers as described in claim 4, characterized in that: A pressure plate (11) is provided below the pressure column (1002), and the pressure plate (11) is fixedly sleeved on the telescopic member (12); the top of the pressure plate (11) is provided with an inclined surface (1101).

6. The grinding equipment for large marine propellers as described in claim 3, characterized in that: The air intake hood (1008) is disposed on the outer side wall of the housing (4), and a dust-blocking mechanism (9) is provided at the air intake hood (1008); the dust-blocking mechanism (9) includes a baffle (903) fixed to the bottom of the air intake hood (1008), a cover (902) is provided above the baffle (903), one side of the cover (902) is attached to the outer side wall of the housing (4), a movable rod (901) is fixed on the cover (902), the movable rod (901) is vertically slidably installed on the housing (4), one side of the movable rod (901) extends into the housing (4), a fixing plate (904) is fixed on the movable rod (901), the fixing plate (904) is elastically connected to the top inner wall of the housing (4) through a first spring (905), and the end of the movable rod (901) away from the cover (902) is located above the side frame (706).

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