CN115990817A

CN115990817A - Screw blade tip coping equipment

Info

Publication number: CN115990817A
Application number: CN202310122793.3A
Authority: CN
Inventors: 刘传超; 盛应彤; 赵昌霞; 周星; 吴晴; 付应勤; 金浩
Original assignee: Anhui Xihe Aviation Technology Co ltd
Current assignee: Anhui Xihe Aviation Technology Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-04-21
Anticipated expiration: 2043-02-16
Also published as: CN115990817B

Abstract

The invention discloses a propeller blade tip grinding device which comprises a bottom plate, wherein a support, a driving module and an air pump are arranged on the bottom plate, a limiting part for fixing a propeller is arranged at the top of the support, a driving seat is arranged on the driving module, a rotating mechanism is arranged on the driving seat, a telescopic mechanism is arranged on the rotating mechanism, and a rotating mechanism is arranged on the telescopic mechanism. In the invention, the grinding part is provided with the telescopic mechanism and the rotating mechanism, the telescopic mechanism is provided with the roller and the elastic component, the roller can prop against the outer edge part of the propeller blade tip, the elastic component can clamp the propeller blade tip, so that the rotating mechanism can be closely attached to the propeller blade tip.

Description

Screw blade tip coping equipment

Technical Field

The invention relates to the technical field of propeller processing, in particular to a device for grinding a tip of a propeller blade.

Background

The propeller is usually composed of two parts, a blade and a hub, and three blades and four blades are commonly used, and five blades and even six blades are respectively used. The blades are thrust-producing, one side of the blade, viewed from the rear of the boat to the head, is called the blade face, and the other side is called the blade back. Where the blade is connected to the hub, the blade root is referred to as the blade root and the end remote from the hub is referred to as the blade tip.

The processing flow of the propeller comprises the grinding of the blade tip, and the curved line type of the blade tip part of the propeller is not regularly changed, so that the grinding difficulty of the blade tip is high, the existing blade tip grinding processing mode is mainly a manual operation grinding machine or a five-axis numerical control milling machine, wherein the manual operation speed is low, the five-axis numerical control machine needs to model the appearance of the propeller, model data are input into a computer of the numerical control milling machine, and a large amount of time is consumed in the two modes, so that the whole processing process is time-consuming and labor-consuming, and the processing efficiency is low.

Disclosure of Invention

The invention aims at: in order to solve the above problems, a propeller blade tip sharpening apparatus is proposed.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a screw blade tip coping equipment, includes the bottom plate, its be provided with support, drive module and air pump on the bottom plate, the top of support is provided with the spacing portion that is used for fixed screw, be provided with the drive seat on the drive module, be provided with slewing mechanism on the drive seat, be provided with telescopic machanism on the slewing mechanism, be provided with rotary mechanism on the telescopic machanism, spacing portion includes back shaft and supporting mechanism, supporting mechanism includes hydraulic telescoping member and pneumatic subassembly, be provided with the trachea between the air pump and the pneumatic subassembly; the telescopic mechanism comprises an elastic telescopic piece, a connecting seat is arranged at the telescopic end of the elastic telescopic piece, a roller and a cylinder body are arranged on the connecting seat, a sliding seat, a connecting rod and a second spring are arranged on the inner side of the cylinder body, and a ball is arranged on one side, far away from the connecting rod, of the sliding seat; the rotary mechanism comprises a connecting plate, a pipe body and a driving piece are respectively arranged at two sides of the connecting plate, a driving shaft is arranged in the pipe body, a turntable is arranged at one end of the driving shaft, which is far away from the connecting plate, a millstone is arranged at one side of the turntable, which is far away from the driving shaft, and an extrusion assembly for discharging grinding materials is arranged between the connecting plate and the turntable; the extrusion assembly comprises a first shell and a second shell, wherein a first push block, a second push block and a stop block are arranged in the first shell in a sliding manner, a through hole is formed in the bottom of the first shell, a first magnet and a second magnet are arranged on one horizontal side of the first shell, a runner is arranged in the inner wall of the other horizontal side of the first shell, the runner is communicated with the second shell through a connecting pipe, and a third spring and a push plate are arranged in the second shell.

Preferably, the rotating mechanism comprises a fixed seat and a supporting plate, the fixed seat is of a cylindrical structure and is fixedly connected to the top of the driving seat, a supporting rod and a first spring are arranged in the fixed seat, the upper end and the lower end of the supporting rod are respectively and rotatably connected with the fixed seat and the supporting plate, the first spring is perpendicular to the supporting rod, and the two ends of the first spring are respectively and rotatably connected with the fixed seat and the supporting plate.

Preferably, the elastic expansion piece is provided with two to the symmetric distribution is at the top both ends of backup pad, the connecting seat is "U" shape or "U" shape structure, the gyro wheel is located the inboard of connecting seat to the two rotates to be connected, the barrel is provided with two to set up respectively in the top both sides of connecting seat, the elastic expansion piece sets up perpendicularly with the barrel, barrel and slide sliding connection, barrel and the coaxial setting of connecting rod, the one end and the slide fixed connection of connecting rod, the other end and the connecting plate rotate to be connected, the ball inlays and establishes the surface at the slide to two sliding contact.

Preferably, the rotating mechanism is provided with two rotating mechanisms, the two rotating mechanisms are located between the two elastic telescopic members, the two rotating mechanisms are arranged oppositely, two ends of the driving shaft are fixedly connected with the output end of the driving member and the center of the rotary table respectively, the grinding disc is provided with a through groove, and the through groove is arranged along the radial direction of the grinding disc.

Preferably, the first casing runs through the carousel to first casing sets up the outer edge at the carousel, the radial direction setting of carousel is followed to first casing, the downside of first casing is located logical inslot, be provided with respectively with first ejector pad, second ejector pad and dog sliding fit's first spout, second spout and third spout on the inner wall of first casing, first spout and third spout set up along the horizontal direction, the second spout sets up along vertical direction, the bottom of first ejector pad and the top sliding contact of second ejector pad, and the bottom of first ejector pad and the top all slope setting of second ejector pad, first ejector pad and dog are ferromagnetic metal material, drive shaft and second casing fixed connection.

Preferably, the support is provided with two to be located the both ends of drive module respectively, two the upper end of support is provided with first lantern ring and second lantern ring respectively, the both ends of back shaft run through first lantern ring and second lantern ring respectively, the periphery that the back shaft is close to first lantern ring one side is provided with the fourth spout, be provided with on the annular inner wall of first lantern ring with fourth spout rolling contact's steel ball, the fourth spout sets up along the axial direction of back shaft, the tip that the back shaft is close to first lantern ring is provided with crank and handle.

Preferably, the hydraulic telescoping member is perpendicular with the back shaft setting, the pneumatic component is provided with two at least to encircle the even setting of back shaft, the pneumatic component includes third casing, utricule and elastic piece, the third casing passes through the trachea intercommunication with the air pump, third casing and utricule intercommunication, be provided with a plurality of non slipping spur on the elastic piece, the end of giving vent to anger of air pump is provided with the valve.

In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:

1. this application has set up the coping portion through setting up, the coping portion has set up telescopic machanism and rotary mechanism, telescopic machanism has set up gyro wheel and elastic component, the gyro wheel can support the outer edge part of screw blade tip, the screw blade tip can be cliied to elastic component, make rotary mechanism can closely laminate screw blade tip, compare in current coping equipment, this equipment is through the gyro wheel along screw blade tip removal, make rotary mechanism can carry out continuous coping to screw blade tip, need not carry out the appearance modeling to the screw, can effectively improve the machining efficiency of coping.

2. This application has set up rotary mechanism through setting up, rotary mechanism has set up the mill, is used for the extrusion subassembly of discharge grinding agent, and the mill is flexible material, and it can laminate the screw blade tip part of different curved surface lineages, and extrusion subassembly passes through centrifugal force as driving force simultaneously, extrudes the grinding agent on the mill, can realize the automatic interpolation of grinding agent, helps improving the coping effect of screw blade tip simultaneously.

3. This application has set up spacing portion through setting up back shaft and supporting mechanism, and supporting mechanism has set up hydraulic telescoping piece and pneumatic component, and pneumatic component inflates through the air pump, makes the antiskid block can support the inner wall of screw propeller hub to play location, spacing effect to the screw, make the screw have higher stability in the course of working, make the screw of multiple different models of equipment adaptation simultaneously.

Drawings

Fig. 1 shows a schematic structural diagram of a coping device and a propeller according to an embodiment of the present invention;

fig. 2 shows a schematic diagram of the overall structure of the polishing apparatus according to the embodiment of the present invention;

FIG. 3 shows a schematic view of a coping section according to an embodiment of the invention;

fig. 4 shows a schematic view of the internal structure of a cylinder provided according to an embodiment of the present invention;

FIG. 5 shows a schematic structural diagram of a rotating mechanism provided according to an embodiment of the present invention;

fig. 6 is a schematic view showing an internal structure of a first housing provided according to an embodiment of the present invention;

fig. 7 is a schematic view showing an internal structure of a second housing provided according to an embodiment of the present invention;

fig. 8 shows a schematic diagram of a limit part structure according to an embodiment of the present invention.

Legend description:

1. a bottom plate; 2. a support; 3. a driving module; 4. a driving seat; 5. a fixing seat; 6. a support plate; 7. a support rod; 8. a first spring; 9. an elastic expansion piece; 10. a connecting seat; 11. a roller; 12. a cylinder; 13. a slide; 14. a ball; 15. a connecting rod; 16. a second spring; 17. a connecting plate; 18. a tube body; 19. a driving member; 20. a drive shaft; 21. a turntable; 22. grinding disc; 23. a through groove; 24. a first housing; 25. a first push block; 26. a second push block; 27. a first chute; 28. a second chute; 29. a through hole; 30. a stop block; 31. a third chute; 32. a first magnet; 33. a second magnet; 34. a second housing; 35. a connecting pipe; 36. a third spring; 37. a push plate; 38. a support shaft; 39. a first collar; 40. a fourth chute; 41. a hydraulic telescoping member; 42. a third housing; 43. a bladder; 44. an elastic sheet; 45. an anti-skid block; 46. a crank; 47. a handle; 48. a second collar; 49. an air pump; 50. and (3) a valve.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-8, the present invention provides a technical solution:

the utility model provides a screw blade tip coping equipment, including bottom plate 1, be provided with support 2, drive module 3 and air pump 49 on its bottom plate 1, the top of support 2 is provided with the spacing portion that is used for fixed screw, be provided with drive seat 4 on the drive module 3, be provided with slewing mechanism on the drive seat 4, be provided with telescopic machanism on the slewing mechanism, be provided with rotary machanism on the telescopic machanism, spacing portion includes back shaft 38 and back mechanism, back mechanism includes hydraulic telescoping 41 and pneumatic subassembly, be provided with the trachea between air pump 49 and the pneumatic subassembly;

the telescopic mechanism comprises an elastic telescopic piece 9, a connecting seat 10 is arranged at the telescopic end of the elastic telescopic piece 9, a roller 11 and a cylinder 12 are arranged on the connecting seat 10, a sliding seat 13, a connecting rod 15 and a second spring 16 are arranged on the inner side of the cylinder 12, and a ball 14 is arranged on one side, far away from the connecting rod 15, of the sliding seat 13;

the rotating mechanism comprises a connecting plate 17, a pipe body 18 and a driving piece 19 are respectively arranged on two sides of the connecting plate 17, a driving shaft 20 is arranged in the pipe body 18, a rotary table 21 is arranged at one end, far away from the connecting plate 17, of the driving shaft 20, a grinding disc 22 is arranged at one side, far away from the driving shaft 20, of the rotary table 21, and an extrusion assembly for discharging grinding materials is arranged between the connecting plate 17 and the rotary table 21;

the pressing assembly includes a first housing 24 and a second housing 34, the inside of the first housing 24 is slidably provided with a first push block 25, a second push block 26 and a stopper 30, the bottom of the first housing 24 is provided with a through hole 29, one horizontal side of the first housing 24 is provided with a first magnet 32 and a second magnet 33, and the inside wall of the other horizontal side is provided with a flow passage which communicates with the second housing 34 through a connection pipe 35, and the inside of the second housing 34 is provided with a third spring 36 and a push plate 37.

Specifically, as shown in fig. 1, 2, 3, 4 and 5, the rotating mechanism comprises a fixed seat 5 and a supporting plate 6, the fixed seat 5 is of a cylindrical structure and is fixedly connected to the top of the driving seat 4, a supporting rod 7 and a first spring 8 are arranged in the fixed seat 5, the upper end and the lower end of the supporting rod 7 are respectively and rotatably connected with the fixed seat 5 and the supporting plate 6, the first spring 8 is vertically arranged with the supporting rod 7, and the two ends of the first spring 8 are respectively and rotatably connected with the fixed seat 5 and the supporting plate 6. The fixing seat 5 is rotationally connected with the supporting plate 6, after the supporting plate 6 rotates, the first spring 8 is compressed to provide power for resetting the supporting plate 6, the radian of blade tips of the propeller blades is different, and the rotating mechanism enables the rotating mechanism to be attached to the blade tips of the propeller.

The elastic expansion piece 9 is provided with two to the symmetric distribution is at the top both ends of backup pad 6, and connecting seat 10 is "U" shape or "U" shape structure, and gyro wheel 11 is located the inboard of connecting seat 10 to the two rotate and connect, barrel 12 is provided with two, and set up respectively in the top both sides of connecting seat 10, and elastic expansion piece 9 sets up perpendicularly with barrel 12, barrel 12 and slide 13 sliding connection, barrel 12 and connecting rod 15 coaxial setting, connecting rod 15's one end and slide 13 fixed connection, the other end and connecting plate 17 rotate and are connected, and ball 14 inlays the surface of establishing at slide 13 to two sliding contact. The elastic telescopic piece 9 can be telescopic, so that the roller 11 can be attached to the outer edge of the blade tip of the propeller, the pipe body 18 is positioned in the middle part of the connecting plate 17, and the rotating mechanism can repair the blade tip part of the propeller. The slide 13 is slidable along the axial direction of the barrel 12 and the second spring 16 allows the balls 14 to bear against the screw blade tip surface.

The two rotating mechanisms are arranged and are located between the two elastic telescopic members 9, the two rotating mechanisms are arranged oppositely, two ends of the driving shaft 20 are fixedly connected with the output end of the driving member 19 and the center of the rotary table 21 respectively, the grinding disc 22 is provided with a through groove 23, and the through groove 23 is arranged along the radial direction of the grinding disc 22. The driving piece 19 can drive the turntable 21 to rotate through the driving shaft 20, so that the grinding disc 22 rotates to grind blade tips, the grinding disc 22 is made of flexible materials, and the turntable 21 is detachably connected with the grinding disc 22, so that the grinding disc 22 is convenient to replace.

Specifically, as shown in fig. 1, 2, 3, 5, 6 and 7, the first casing 24 penetrates through the turntable 21, the first casing 24 is disposed on an outer edge of the turntable 21, the first casing 24 is disposed along a radial direction of the turntable 21, a lower side of the first casing 24 is located in the through groove 23, a first chute 27, a second chute 28 and a third chute 31 which are respectively in sliding fit with the first push block 25, the second push block 26 and the stop block 30 are disposed on an inner wall of the first casing 24, the first chute 27 and the third chute 31 are disposed along a horizontal direction, the second chute 28 is disposed along a vertical direction, a bottom of the first push block 25 is in sliding contact with a top of the second push block 26, the bottom of the first push block 25 and the top of the second push block 26 are all disposed obliquely, the first push block 25 and the stop block 30 are made of ferromagnetic metal materials, and the driving shaft 20 is fixedly connected with the second casing 34. The second casing 34 is provided with a sealing cover, pasty grinding agent is poured into the second casing, when the rotating mechanism is in a static state, the third spring 36 drives the push plate 37 to squeeze the grinding agent, so that the grinding agent enters the first casing 24 along the connecting pipe 35 and the flow channel, at the moment, the first magnet 32 and the second magnet 33 respectively attract the first push block 25 and the stop block 30, so that the stop block 30 blocks the through hole 29, after the driving piece 19 is started, under the action of centrifugal force, the first push block 25 and the stop block 30 are respectively far away from the first magnet 32 and the second magnet 33, the first push block 25 pushes the second push block 26 to be close to the stop block 30, and the squeezed grinding agent is discharged from the through hole 29 and coated on the tip surface of the screw blade.

Specifically, as shown in fig. 1, 2 and 8, two supports 2 are provided and are respectively located at two ends of the driving module 3, a first collar 39 and a second collar 48 are respectively provided at upper ends of the two supports 2, two ends of the supporting shaft 38 respectively penetrate through the first collar 39 and the second collar 48, a fourth sliding groove 40 is provided at an outer periphery of the supporting shaft 38 near one side of the first collar 39, steel balls in rolling contact with the fourth sliding groove 40 are provided on an annular inner wall of the first collar 39, the fourth sliding groove 40 is provided along an axial direction of the supporting shaft 38, and a crank 46 and a handle 47 are provided at an end of the supporting shaft 38 near the first collar 39. The crank 46 is rotated to drive the support shaft 38 to rotate and further drive the propeller to rotate, so that the device can repair the blade tips of the plurality of blades, and the handle 47 can drag the support shaft 38 to separate from the second collar 48, so that the propeller can be assembled and disassembled by the lifting device.

Specifically, as shown in fig. 8, the hydraulic expansion member 41 is vertically disposed with the support shaft 38, at least two pneumatic components are disposed and uniformly disposed around the support shaft 38, the pneumatic components include a third casing 42, a bag body 43 and an elastic sheet 44, the third casing 42 is communicated with the air pump 49 through an air pipe, the third casing 42 is communicated with the bag body 43, the elastic sheet 44 is provided with a plurality of anti-slip blocks 45, and an air outlet end of the air pump 49 is provided with a valve 50. The hydraulic expansion piece 41 can enable the air pressure component to be close to the inner wall of the propeller hub through stretching, the air pump 49 is used for inflating the bag body 43, the bag body 43 is inflated, and then the anti-skid block 45 is tightly attached to the propeller hub, so that the propeller can be positioned.

In summary, in the present embodiment, during processing, the supporting shaft 38 is moved horizontally to separate the supporting shaft 38 from the second collar 48, then the screw is moved between the two supports 2 by the lifting device, then the supporting shaft 38 is moved reversely to pass through the second collar 48, then the hydraulic telescopic member 41 is stretched, the air pump 49 is used to inflate the capsule 43, the capsule 43 is expanded to bend the elastic sheet 44 to be more fit with the radian of the hub, the anti-slip block 45 is tightly fit with the inner wall of the hub, then the supporting shaft 38 is rotated to make the blade of the screw face down, the driving module 3 is started to make the blade tip portion of the blade located between the roller 11 and the two corresponding balls 14, the roller 11 is fit with the outer edges of the blade tip under the elastic force of the elastic telescopic member 9 and the second spring 16, the two balls 14 are respectively fit with the two sides of the blade tip, the grinding disc 22 can be moved along the blade tip under the driving of the driving member 19 as the driving of the driving module 3, the grinding disc 22 is rotated to grind the surface of the blade tip, and simultaneously the grinding abrasive tip under the centrifugal force of the driving member 19 is pushed by the first pushing block 25 to push the second pushing block 26 to squeeze the blade tip from the through hole 29.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a screw blade tip coping equipment, includes bottom plate (1), its characterized in that, be provided with support (2), drive module (3) and air pump (49) on bottom plate (1), the top of support (2) is provided with the spacing portion that is used for fixed screw, be provided with drive seat (4) on drive module (3), be provided with slewing mechanism on drive seat (4), be provided with telescopic machanism on the slewing mechanism, be provided with rotary mechanism on the telescopic machanism, spacing portion includes back shaft (38) and supporting mechanism, supporting mechanism includes hydraulic telescoping (41) and air pressure subassembly, be provided with the trachea between air pump (49) and the air pressure subassembly;

the telescopic mechanism comprises an elastic telescopic piece (9), a connecting seat (10) is arranged at the telescopic end of the elastic telescopic piece (9), a roller (11) and a cylinder body (12) are arranged on the connecting seat (10), a sliding seat (13), a connecting rod (15) and a second spring (16) are arranged on the inner side of the cylinder body (12), and a ball (14) is arranged on one side, far away from the connecting rod (15), of the sliding seat (13);

the rotary mechanism comprises a connecting plate (17), two sides of the connecting plate (17) are respectively provided with a pipe body (18) and a driving piece (19), a driving shaft (20) is arranged in the pipe body (18), one end, far away from the connecting plate (17), of the driving shaft (20) is provided with a rotary table (21), one side, far away from the driving shaft (20), of the rotary table (21) is provided with a grinding disc (22), and an extrusion assembly used for discharging grinding agents is arranged between the connecting plate (17) and the rotary table (21);

the extrusion assembly comprises a first shell (24) and a second shell (34), wherein a first push block (25), a second push block (26) and a stop block (30) are arranged in the first shell (24) in a sliding manner, a through hole (29) is formed in the bottom of the first shell (24), a first magnet (32) and a second magnet (33) are arranged on one horizontal side of the first shell (24), a runner is arranged in the inner wall of the other horizontal side, the runner is communicated with the second shell (34) through a connecting pipe (35), and a third spring (36) and a push plate (37) are arranged in the second shell (34).

2. The propeller blade tip grinding device according to claim 1, wherein the rotating mechanism comprises a fixed seat (5) and a supporting plate (6), the fixed seat (5) is of a cylindrical structure and is fixedly connected to the top of the driving seat (4), a supporting rod (7) and a first spring (8) are arranged in the fixed seat (5), the upper end and the lower end of the supporting rod (7) are respectively and rotatably connected with the fixed seat (5) and the supporting plate (6), the first spring (8) is vertically arranged with the supporting rod (7), and the two ends of the first spring (8) are respectively and rotatably connected with the fixed seat (5) and the supporting plate (6).

3. The propeller blade tip grinding device according to claim 2, characterized in that the elastic telescopic members (9) are provided with two, and symmetrically distributed at two ends of the top of the supporting plate (6), the connecting base (10) is of a U-shaped or U-shaped structure, the roller (11) is located at the inner side of the connecting base (10) and is rotationally connected with the connecting base, the cylinder (12) is provided with two, and is respectively arranged at two sides of the top of the connecting base (10), the elastic telescopic members (9) are vertically arranged with the cylinder (12), the cylinder (12) is slidably connected with the sliding base (13), the cylinder (12) is coaxially arranged with the connecting rod (15), one end of the connecting rod (15) is fixedly connected with the sliding base (13), the other end of the connecting rod is rotationally connected with the connecting plate (17), and the ball (14) is embedded on the surface of the sliding base (13) and is slidably contacted with the sliding base.

4. A propeller blade tip grinding apparatus according to claim 3, characterized in that the rotation mechanisms are provided in two, and in that the rotation mechanisms are located between the elastic telescopic members (9), the rotation mechanisms are disposed opposite to each other, both ends of the drive shaft (20) are fixedly connected with the output end of the drive member (19) and the center of the turntable (21), the turntable (22) is provided with a through groove (23), and the through groove (23) is disposed along the radial direction of the turntable (22).

5. The propeller blade tip grinding device according to claim 4, wherein the first housing (24) penetrates through the turntable (21), the first housing (24) is arranged on the outer edge of the turntable (21), the first housing (24) is arranged along the radial direction of the turntable (21), the lower side of the first housing (24) is located in the through groove (23), a first sliding groove (27), a second sliding groove (28) and a third sliding groove (31) which are respectively in sliding fit with the first sliding block (25), the second sliding block (26) and the stop block (30) are arranged on the inner wall of the first housing (24), the first sliding groove (27) and the third sliding groove (31) are arranged along the horizontal direction, the second sliding groove (28) is arranged along the vertical direction, the bottom of the first sliding block (25) is in sliding contact with the top of the second sliding block (26), the bottom of the first sliding block (25) is obliquely arranged with the top of the second sliding block (26), and the first sliding block (25) and the stop block (30) are both ferromagnetic materials and are fixedly connected with the second driving shaft (20).

6. The propeller blade tip grinding device according to claim 1, wherein the two supports (2) are provided and are respectively located at two ends of the driving module (3), a first collar (39) and a second collar (48) are respectively provided at the upper ends of the two supports (2), two ends of the supporting shaft (38) penetrate through the first collar (39) and the second collar (48) respectively, a fourth sliding groove (40) is provided at the periphery of the supporting shaft (38) close to one side of the first collar (39), steel balls in rolling contact with the fourth sliding groove (40) are provided on the annular inner wall of the first collar (39), the fourth sliding groove (40) is provided along the axial direction of the supporting shaft (38), and a crank (46) and a handle (47) are provided at the end of the supporting shaft (38) close to the first collar (39).

7. The propeller blade tip grinding device according to claim 1, wherein the hydraulic telescopic member (41) is arranged perpendicular to the supporting shaft (38), the air pressure assembly is provided with at least two air pressure assemblies and is uniformly arranged around the supporting shaft (38), the air pressure assembly comprises a third shell (42), a bag body (43) and an elastic sheet (44), the third shell (42) is communicated with the air pump (49) through an air pipe, the third shell (42) is communicated with the bag body (43), the elastic sheet (44) is provided with a plurality of anti-skid blocks (45), and the air outlet end of the air pump (49) is provided with a valve (50).