CN219287332U

CN219287332U - Special device for repairing wind driven generator

Info

Publication number: CN219287332U
Application number: CN202320827973.7U
Authority: CN
Inventors: 孙兴浩; 李泽米; 赵鑫尧; 张英杰; 牛建虎; 崔江伟
Original assignee: Yongji Tianzuo Electric Co ltd
Current assignee: Yongji Tianzuo Electric Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-06-30
Anticipated expiration: 2033-04-14

Abstract

The utility model belongs to the technical field of wind driven generators, and particularly relates to a special device for repairing a wind driven generator. The utility model meets the repair requirements of all the rotating shafts of large and medium-sized motors and generators, does not need to draw out the motor rotor from the engine base, reduces unnecessary workload, saves repair cost, reduces maintenance cost, particularly meets the requirement of repairing the shaft on towers with the height of tens of meters or even hundreds of meters for wind power generation, and greatly saves repair cost; the shutdown period is shortened, and the economic benefit of wind power enterprises is improved.

Description

Special device for repairing wind driven generator

Technical Field

The utility model belongs to the technical field of wind driven generators, and particularly relates to a special device for repairing a wind driven generator.

Background

The wind driven generator is an electric power device which converts wind energy into mechanical work and drives a rotor to rotate and finally outputs alternating current. The wind driven generator generally comprises wind wheels, a generator, a direction regulator, a tower, a speed limiting safety mechanism, an energy storage device and the like. Once the bearing of the wind driven generator fails on the tower, the generator is dismantled, the nacelle on the tower is lifted from the nacelle on the tower with the height of tens of meters or hundreds of meters, falls down by using a lifting device, and is transported to a motor repair plant for repair, and then the nacelle on the tower is lifted by using the lifting device for installation, so that the wind driven generator has long tedious period and considerable cost.

Disclosure of Invention

Aiming at the technical problem that the wind driven generator needs to be dismantled when bearing faults occur on the tower of the wind driven generator, the utility model provides the special device for repairing the wind driven generator, and the repair is carried out on the nacelle on the tower in situ, so that the labor productivity is greatly improved, a large amount of repair cost is saved, the shutdown time is shortened, and the economic benefit of wind power generation enterprises is effectively improved.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a isolated plant for aerogenerator repairs, includes main tributary strutting arrangement, body frame, main shaft drive assembly, axial drive assembly, radial feeding subassembly, drive power supply, motor shaft and motor frame, main tributary strutting arrangement is fixed on the body frame, main shaft drive assembly is fixed on the body frame, radial feeding subassembly fixedly connected with axial drive assembly, axial drive assembly fixed connection is on the body frame, body frame fixed connection is on the motor frame, drive power supply respectively with main shaft drive assembly, axial drive assembly electric connection.

The main support device comprises a support frame, a roller, a first connecting bolt, a second connecting bolt, an adjusting bolt, a lever, a third connecting bolt and a connecting nut, wherein the support frame is fixedly connected to the main frame body through the third connecting bolt, the roller is arranged on the lever through the first connecting bolt, the lever is arranged on the support frame through the second connecting bolt, the adjusting bolt is arranged on the lever, the adjusting bolt is arranged between the roller and the lever, and the connecting nut is connected to the first connecting bolt and the second connecting bolt.

The main frame body comprises a main frame body, a fourth connecting bolt, a spigot plate and a fifth connecting bolt, wherein the spigot plate is fixedly connected with the main frame body through the fifth connecting bolt, and the main frame body is fixedly connected with the motor base through the fourth connecting bolt.

The main body frame body comprises an arc plate, a horizontal plate, a driving mounting plate, a first triangular support plate, a second triangular support plate, a third triangular support plate and a fourth triangular support plate, wherein the horizontal plate is perpendicularly welded on the arc plate, the first triangular support plate, the second triangular support plate, the third triangular support plate and the fourth triangular support plate are welded between the side surface of the horizontal plate and the arc plate, and the driving mounting plate is perpendicularly welded on the arc plate.

The circular arc plate is provided with a first lightening hole, a screw hole, a strip-shaped adjusting hole and a second lightening hole, the horizontal plate is provided with a main supporting hole and a mounting screw hole, the horizontal plate is fixedly connected with the axial driving assembly through the mounting screw hole, the driving mounting plate is provided with the lightening hole and a motor mounting screw hole, and the driving mounting plate is fixedly connected with the motor base through the motor mounting screw hole.

The main shaft driving assembly comprises a driving support, a driving motor, a sixth connecting bolt, a seventh connecting bolt, a main driving toothed belt wheel, a toothed belt, a driven toothed belt wheel, a tensioning bolt and a tensioning wheel, wherein the driving support is fixedly connected to a driving mounting plate through the sixth connecting bolt, the driving motor is fixedly connected to the driving support through the seventh connecting bolt, the main driving toothed belt wheel is arranged on the driving motor, the toothed belt is arranged between the main driving toothed belt wheel and the driven toothed belt wheel, the driven toothed belt wheel is arranged on a motor shaft through the tensioning wheel, and the tensioning wheel is fixedly connected with the driven toothed belt wheel through the tensioning bolt.

The axial driving assembly comprises an axial driving electric assembly, an axial driving manual assembly, a connecting sleeve, an eighth connecting bolt, a connecting flange, a carriage, a limiting collision block, a limiting switch, a feed screw pair, a bearing gun platform, a ninth connecting bolt, a sliding rail, a tenth connecting bolt, a tightening screw, an eleventh connecting bolt, a sliding block, a screw seat and a sliding rail bottom plate, wherein the axial driving manual assembly is connected to the axial driving electric assembly, the axial driving electric assembly is fixedly connected to the connecting sleeve, and the connecting sleeve is fixedly connected to the connecting flange through the eighth connecting bolt.

The sliding rail base plate is fixedly connected with the sliding rail, the sliding rail is connected with the sliding block in a sliding manner, the sliding block is fixedly connected with the sliding plate, limit switches are arranged on two sides of the sliding rail, limit collision blocks are arranged at two ends of the sliding rail, and the feeding screw pair is fixedly connected with the bearing gun platform through a tenth connecting bolt.

The radial feeding assembly comprises a small carriage, an oil injection cup, a manual feeding assembly, a compression screw, a compression nut, a cutter disc, a dovetail plate, a lining plate, a locking nut, an adjusting screw and a twelfth connecting bolt, wherein the cutter disc is fixed on the small carriage through the compression screw and the compression nut, the cutter is installed on the cutter disc, the cutter disc is connected with the cutter pressing screw in a threaded manner, the cutter is pressed by the cutter pressing screw, the dovetail plate is fixedly connected on the carriage through the twelfth connecting bolt, the lining plate is fixed on two sides of the dovetail plate, one side of the lining plate is provided with the adjusting screw, the locking nut is connected on the adjusting screw in a threaded manner, the manual feeding assembly is installed on the dovetail plate, and the oil injection cup is arranged on the manual feeding assembly.

The manual feeding assembly comprises a dial, a tightening nut, a screw rod and a handle, wherein the dial is connected with the small carriage through the tightening nut, the screw rod is fixedly connected with the cutter head, and the handle is connected to the end part of the screw rod.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model meets the repair requirements of all the rotating shafts of large and medium-sized motors and generators, does not need to draw out the motor rotor from the engine base, reduces unnecessary workload, saves repair cost, reduces maintenance cost, particularly meets the requirement of repairing the shaft on towers with the height of tens of meters or even hundreds of meters for wind power generation, and greatly saves repair cost; the shutdown period is shortened, and the economic benefit of wind power enterprises is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the scope of the utility model.

FIG. 1 is a front view of the present utility model;

FIG. 2 is a side view of the present utility model;

FIG. 3 is a top view of the present utility model;

FIG. 4 is a schematic diagram of a driving power supply according to the present utility model;

FIG. 5 is a front view of the main frame of the present utility model;

FIG. 6 is a side view of the main frame of the present utility model;

FIG. 7 is a top view of the main frame of the present utility model;

fig. 8 is a schematic view of the installation of the present utility model.

Wherein: 100 is a main supporting device, 11 is a supporting frame, 12 is a roller, 13 is a first connecting bolt, 14 is a second connecting bolt, 15 is an adjusting bolt, 16 is a lever, 17 is a third connecting bolt, 18 is a connecting nut, 200 is a main frame body, 21 is a main frame body, 210 is an arc plate, 220 is a horizontal plate, 230 is a driving mounting plate, 240 is a first triangular supporting plate, 250 is a second triangular supporting plate, 260 is a third triangular supporting plate, 270 is a fourth triangular supporting plate, 22 is a fourth connecting bolt, 23 is a mouth plate, 24 is a fifth connecting bolt, 300 is a main shaft driving component, 31 is a driving bracket, 32 is a driving motor, 33 is a sixth connecting bolt, 34 is a seventh connecting bolt, 35 is a main driving toothed belt wheel, 36 is a toothed belt, 37 is a driven toothed belt wheel, 38 is a tensioning bolt, 39 is a tensioning wheel, 400 is an axial driving component, 41 is an axial driving electric component, 42 is a shaft-driving manual assembly, 43 is a connecting sleeve, 44 is an eighth connecting bolt, 45 is a connecting flange, 46 is a carriage, 47 is a limit bump, 48 is a limit switch, 49 is a feed screw pair, 410 is a bearing turret, 411 is a ninth connecting bolt, 412 is a slide rail, 413 is a tenth connecting bolt, 414 is a parallel screw, 415 is an eleventh connecting bolt, 416 is a slider, 417 is a screw seat, 418 is a slide rail bottom plate, 500 is a radial feeding assembly, 51 is a small carriage, 52 is an oil-pouring cup, 53 is a manual feeding assembly, 531 is a dial, 532 is a parallel screw, 533 is a screw rod, 534 is a handle, 54 is a compression screw, 55 is a compression screw, 56 is a compression screw, 57 is a cutter, 58 is a cutter disc, 59 is a dovetail plate, 510 is a lining plate, 511 is a lock nut, 512 is an adjusting screw, 513 is a twelfth connecting bolt, 600 is a driving power source, 700 is a motor shaft, 800 is a motor housing.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and these descriptions are only for further illustrating the features and advantages of the present utility model, not limiting the claims of the present utility model; all other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the present embodiment, as shown in fig. 1 to 8, the main supporting means 100 is first fixed to the main frame body 200 by the third coupling bolts 17. The main shaft driving assembly 300 is fixed on the main frame body 200 through a sixth connecting bolt 33, the other part of the driven gear belt wheel 37 is fixed on a corresponding position of the motor shaft 700 through a tensioning bolt 38 in a tensioning manner, and the radial feeding assembly 500 is fixed on the axial feeding carriage 46 through a twelfth connecting bolt 513, so that the connection and the fixation of the radial feeding device and the axial feeding device are completed. Further, the axial feed assembly is fixedly coupled to the main frame body 200 by an eleventh coupling bolt 415. The corresponding position of the spigot plate 23 is adjusted by the adjusting bolt 24 to correspond to the spigot of the motor base 800. The main body frame is fixedly coupled to the motor housing 800 by a fourth coupling bolt 22. A drive toothed belt 36 is mounted to connect the spindle drive assembly to the motor rotor shaft. Finally, the driving power source 600 is connected to the spindle driving assembly 300 and the axial driving assembly 400. Turning on the driving power supply 600, the spindle driving assembly 300 drives the motor shaft 700 to start rotating under the support of the main support, the manual driving handle is adjusted, the position of the cutter on the shaft is adjusted at the manual position, meanwhile, the swinging shaft is driven by the manual assembly 42 to adjust the corresponding position of the cutter 57 on the shaft, the axial feeding is switched to the electric feeding position, the axial feeding starts cutting and repairing, and after the machining is finished, the cutter is retracted radially at first, and the cutter is retracted axially; the driving power source 600 is turned off.

Further, as shown in fig. 5 to 7, the supporting frame 11 is fixedly connected to the main frame body 200 through a third connecting bolt 17, the roller 12 is mounted on the lever 16 through a first connecting bolt 13, and the roller 12 is in contact with the motor rotor shaft and supported upwards. The lever 16 is mounted on the support frame 11 through the second connecting bolt 14, the adjusting bolt 15 is mounted on the lever 16, the adjusting bolt 15 is arranged between the roller 12 and the lever 16, and the first connecting bolt 13 and the second connecting bolt 14 are connected with the connecting nut 18. The spigot plate 23 is fixedly connected with the main body frame 21 through a fifth connecting bolt 24, and the main body frame 21 is fixedly connected with the motor base 800 through a fourth connecting bolt 22. The corresponding position of the spigot plate 23 is adjusted by the adjusting bolt 24 to correspond to the spigot of the motor base 800.

Further, the first, second, third and fourth

triangle support plates

240, 250, 260 and 270 are welded between the side surfaces of the horizontal plate 220 and the circular arc plate 210, and the driving mounting plate 230 is vertically welded to the circular arc plate 210. The circular arc plate 210 is provided with a first lightening hole 211, a screw hole 212, a strip-shaped adjusting hole 213 and a second lightening hole 214, the horizontal plate 220 is provided with a main supporting hole 221 and a mounting screw hole 222, the horizontal plate 220 is fixedly connected with the axial driving assembly 400 through the mounting screw hole 222, the driving mounting plate 230 is provided with a lightening hole 231 and a mounting motor screw hole 232, and the driving mounting plate 230 is fixedly connected with the motor base 800 through the mounting motor screw hole 232.

Further, the driving bracket 31 is fixedly connected to the driving mounting plate 230 through a sixth connecting bolt 33, the driving motor 32 is fixedly connected to the driving bracket 31 through a seventh connecting bolt 34, the driving toothed belt wheel 35 is mounted on the driving motor 32, the toothed belt 36 is mounted between the driving toothed belt wheel 35 and the driven toothed belt wheel 37, the driven toothed belt wheel 37 is mounted on the motor shaft 700 through a tension wheel 39, and the tension wheel 39 is fixedly connected with the driven toothed belt wheel 37 through a tension bolt 38.

Further, the manual shaft-driving assembly 42 is connected to the electric shaft-driving assembly 41, the electric shaft-driving assembly 41 is fixedly connected to the connecting sleeve 43, and the connecting sleeve 43 is fixedly connected to the connecting flange 45 by the eighth connecting bolt 44. The carriage 46 is fixedly connected with the radial feeding assembly 500, the axial driving electric assembly 41 and the axial driving manual assembly 42 penetrate through the connecting sleeve 43 to be connected with the feed screw assembly 49, the sliding rail base plate 418 is fixedly connected to the main frame body 200 through an eleventh connecting bolt 415, the sliding rail base plate 418 is fixedly connected with the sliding rail 412, the sliding rail 412 is slidably connected with the sliding block 416, the carriage 46 is fixedly connected to the sliding block 416, limit switches 48 are arranged on two sides of the sliding rail 412, limit bumps 47 are arranged on two ends of the sliding rail 412, and the feed screw assembly 49 is fixedly connected with the bearing gun block 410 through a tenth connecting bolt 413 and used for driving the axial driving electric assembly 41 or the axial driving manual assembly 42 to rotate to drag the carriage 46 to move.

Further, the cutter head 58 is fixed on the small carriage 51 through the compression screw 54 and the compression nut 55, the cutter 57 is installed on the cutter head 58, the cutter pressing screw 56 is connected to the cutter head 58 in a threaded mode, the cutter pressing screw 56 compresses the cutter 57, the dovetail plate 59 is fixedly connected to the carriage 46 through the twelfth connecting bolt 513, the lining plates 510 are fixed on two sides of the dovetail plate 59, friction is reduced, and a gap between the dovetail plate 59 and the small carriage 51 is eliminated. One side of the lining plate 510 is provided with an adjusting screw 512, the adjusting screw 512 is connected with a locking nut 511 in a threaded manner, the dovetail plate 59 is provided with a manual feeding component 53, and the oil filling cup 52 is arranged on the manual feeding component 53. The dial 531 is connected to the small carriage 51 by tightening the nut 532, eliminating the movement clearance of the cutter 57. The screw 533 is fixedly connected with the cutter 58, the handle 534 is connected to the end of the screw 533, and the manual feeding handle 534 controls the small carriage 51 to move.

The preferred embodiments of the present utility model have been described in detail, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model, and the various changes are included in the scope of the present utility model.

Claims

1. A special device for repairing a wind power generator, characterized in that: including main tributary support device (100), body frame (200), main shaft drive assembly (300), axial drive assembly (400), radial feed assembly (500), drive power supply (600), motor shaft (700) and motor frame (800), main tributary support device (100) are fixed on body frame (200), main shaft drive assembly (300) are fixed on body frame (200), radial feed assembly (500) fixedly connected with axial drive assembly (400), axial drive assembly (400) fixedly connected on body frame (200), body frame (200) fixedly connected on motor frame (800), drive power supply (600) respectively with main shaft drive assembly (300), axial drive assembly (400) electric connection.

2. A special device for repairing a wind turbine according to claim 1, wherein: main support device (100) are including support frame (11), gyro wheel (12), first connecting bolt (13), second connecting bolt (14), adjusting bolt (15), lever (16), third connecting bolt (17) and coupling nut (18), support frame (11) are on body frame (200) through third connecting bolt (17) fixed connection, gyro wheel (12) are installed on lever (16) through first connecting bolt (13), lever (16) are installed on support frame (11) through second connecting bolt (14), adjusting bolt (15) are installed on lever (16), adjusting bolt (15) set up between gyro wheel (12) and lever (16), be connected with coupling nut (18) on first connecting bolt (13) and second connecting bolt (14).

3. A special device for repairing a wind turbine according to claim 1, wherein: the main frame body (200) comprises a main frame body (21), a fourth connecting bolt (22), a spigot plate (23) and a fifth connecting bolt (24), wherein the spigot plate (23) is fixedly connected with the main frame body (21) through the fifth connecting bolt (24), and the main frame body (21) is fixedly connected with the motor base (800) through the fourth connecting bolt (22).

4. A special device for repairing a wind turbine according to claim 3, wherein: the main body frame body (21) comprises an arc plate (210), a horizontal plate (220), a drive mounting plate (230), a first triangular support plate (240), a second triangular support plate (250), a third triangular support plate (260) and a fourth triangular support plate (270), wherein the horizontal plate (220) is vertically welded on the arc plate (210), the first triangular support plate (240), the second triangular support plate (250), the third triangular support plate (260) and the fourth triangular support plate (270) are welded between the side surface of the horizontal plate (220) and the arc plate (210), and the drive mounting plate (230) is vertically welded on the arc plate (210).

5. A special device for repairing a wind turbine according to claim 4, wherein: first lightening holes (211), screw holes (212), strip-shaped adjusting holes (213) and second lightening holes (214) are formed in the circular arc plate (210), main supporting holes (221) and mounting screw holes (222) are formed in the horizontal plate (220), the horizontal plate (220) is fixedly connected with the axial driving assembly (400) through the mounting screw holes (222), lightening holes (231) and mounting motor screw holes (232) are formed in the driving mounting plate (230), and the driving mounting plate (230) is fixedly connected with the motor base (800) through the mounting motor screw holes (232).

6. A special device for repairing a wind turbine according to claim 4, wherein: the main shaft drive assembly (300) comprises a drive support (31), a drive motor (32), a sixth connecting bolt (33), a seventh connecting bolt (34), a main drive toothed belt wheel (35), a toothed belt (36), a driven toothed belt wheel (37), a tensioning bolt (38) and a tensioning wheel (39), wherein the drive support (31) is fixedly connected to a drive mounting plate (230) through the sixth connecting bolt (33), the drive motor (32) is fixedly connected to the drive support (31) through the seventh connecting bolt (34), the main drive toothed belt wheel (35) is mounted on the drive motor (32), the toothed belt (36) is mounted between the main drive toothed belt wheel (35) and the driven toothed belt wheel (37), the driven toothed belt wheel (37) is mounted on a motor shaft (700) through the tensioning wheel (39), and the tensioning wheel (39) is fixedly connected with the driven toothed belt wheel (37) through the tensioning bolt (38).

7. A special device for repairing a wind turbine according to claim 1, wherein: the axial driving assembly (400) comprises an axial driving electric assembly (41), an axial driving manual assembly (42), a connecting sleeve (43), an eighth connecting bolt (44), a connecting flange (45), a carriage (46), a limit bump (47), a limit switch (48), a feed screw pair (49), a bearing gun block (410), a ninth connecting bolt (411), a sliding rail (412), a tenth connecting bolt (413), a tightening screw (414), an eleventh connecting bolt (415), a sliding block (416), a screw seat (417) and a sliding rail bottom plate (418), the axial driving manual assembly (42) is connected to the axial driving electric assembly (41), the axial driving electric assembly (41) is fixedly connected to the connecting sleeve (43), and the connecting sleeve (43) is fixedly connected to the connecting flange (45) through the eighth connecting bolt (44).

8. A special device for repairing a wind turbine according to claim 7, wherein: the novel automatic feeding device is characterized in that the carriage (46) is fixedly connected with the radial feeding assembly (500), the axial driving electric assembly (41) and the axial driving manual assembly (42) penetrate through the connecting sleeve (43) to be connected with the feeding screw pair (49), the sliding rail bottom plate (418) is fixedly connected to the main frame body (200) through an eleventh connecting bolt (415), the sliding rail bottom plate (418) is fixedly connected with the sliding rail (412), the sliding rail (412) is slidably connected with the sliding block (416), the carriage (46) is fixedly connected to the sliding block (416), limit switches (48) are arranged on two sides of the sliding rail (412), limit bumps (47) are arranged at two ends of the sliding rail (412), and the feeding screw pair (49) is fixedly connected with the bearing gun platform (410) through a tenth connecting bolt (413).

9. A special device for repairing a wind turbine according to claim 1, wherein: radial feeding subassembly (500) are including little planker (51), oiling cup (52), manual feeding subassembly (53), clamp screw (54), gland nut (55), clamp screw (56), cutter (57), blade disc (58), dovetail (59), welt (510), lock nut (511), adjusting screw (512), twelfth connecting bolt (513), blade disc (58) are fixed on little planker (51) through clamp screw (54) and gland nut (55), install cutter (57) on blade disc (58), threaded connection has clamp screw (56) on blade disc (58), clamp screw (56) compress tightly cutter (57), dovetail (59) are fixed on planker (46) through twelfth connecting bolt (513), the both sides of dovetail (59) are fixed with welt (510), one side of welt (510) is provided with adjusting screw (512), threaded connection has lock nut (511) on adjusting screw (512), install clamp screw (56) on manual assembly (59), install clamp screw (56) on feeding subassembly (53).

10. A special device for repairing a wind turbine according to claim 9, wherein: the manual feeding assembly (53) comprises a dial (531), a tightening nut (532), a screw rod (533) and a handle (534), wherein the dial (531) is connected with the small dragging plate (51) through the tightening nut (532), the screw rod (533) is fixedly connected with the cutter head (58), and the handle (534) is connected to the end portion of the screw rod (533).