CN214399547U

CN214399547U - Gantry crane with derailing prevention device

Info

Publication number: CN214399547U
Application number: CN202120618055.4U
Authority: CN
Inventors: 张建胜; 丁朝杰; 韩争; 张衡; 张建增
Original assignee: Henan Huatun Heavy Industry Machinery Equipment Co ltd
Current assignee: Henan Huatun Heavy Industry Machinery Equipment Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-10-15
Anticipated expiration: 2031-03-26

Abstract

The utility model discloses a gantry crane with anticreep rail device, including crossbeam, drive dolly and A-frame, the crossbeam is transversely installed on the top of A-frame, and the inside both ends of crossbeam transversely are provided with the track roof beam, the driver's cabin is installed to the crossbeam bottom of A-frame one side, the top of crossbeam is provided with the drive dolly, and drives four corners in dolly bottom and install the drive frame with track roof beam matched with, and four corners of the inside bottom of drive frame are provided with the drive wheel, the lifting box is installed at the both ends on drive dolly top, and lifts by crane the intermediate position department of case one side and install servo motor, the hoist section of thick bamboo that extends to the lifting box inside is installed through the pivot to the servo motor output, the lifting hook is installed to the one end of cable wire. The utility model discloses a set up the auxiliary wheel, remove to the drive dolly and carry out the auxiliary correction, reduce the derailment phenomenon that the drive dolly removed, improve its safety in utilization.

Description

Gantry crane with derailing prevention device

Technical Field

The utility model relates to a hoist technical field specifically is a gantry crane with anticreep rail device.

Background

The gantry crane is a deformation of the bridge crane, is called a gantry crane, has the characteristics of high site utilization rate, large operation range, wide application range, strong universality and the like, is widely applied to various industries in the market, particularly port goods yards, and also produces various gantry cranes with better performances in the market, but the existing gantry crane has many problems or defects:

first, traditional gantry crane does not have derailment prevention structure during the use, and at the operation in-process, the derailment probably takes place for the drive dolly, and then causes more serious economic loss and potential safety hazard.

Second, traditional gantry crane does not have the anti-drop structure during the use, lifts by crane the operation in-process, and the trouble probably leads to the goods to descend because of gravity, influences the normal operation of lifting by crane.

Third, traditional gantry crane does not clean the structure during use, and the inside impurity of track is inconvenient to be cleaned, and impurity is too much can influence the normal operating of drive dolly.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gantry crane with anticreep rail device to solve the inconvenient anticreep rail that proposes in the above-mentioned background art, inconvenient anti-drop and the inconvenient problem of cleaning.

In order to achieve the above object, the utility model provides a following technical scheme: a portal crane with an anti-derailment device comprises a cross beam, a driving trolley and a triangular support, and further comprises an anti-falling mechanism for preventing goods from falling off during lifting, a cleaning structure for reducing the influence of impurities on operation and an anti-derailment structure for generating potential safety hazards;

the top end of the triangular support is transversely provided with a cross beam, two ends of the interior of the cross beam are transversely provided with track beams, the bottom end of the cross beam on one side of the triangular support is provided with a cab, a PLC (programmable logic controller) is arranged in the cab, a driving trolley is arranged above the cross beam, driving frames matched with the track beams are arranged at four corners of the bottom end of the driving trolley, driving wheels are arranged at four corners of the bottom end of the interior of the driving frames, and the anti-derailment structure is arranged at the upper ends of the two ends of the interior of the driving frames;

the cleaning structure is arranged in the track beam at the two ends of the lower end of one side of the driving frame;

the lifting box is installed at the both ends on drive dolly top, and lifts by crane the intermediate position department of case one side and install servo motor, the hoist section of thick bamboo that extends to lifting box inside is installed through the pivot to the servo motor output, and the surface winding of hoist section of thick bamboo has the cable wire, the lifting hook is installed to the one end of cable wire, anti-falling mechanism sets up the one side of keeping away from servo motor lifting box inside.

Preferably, the anticreep rail structure includes the fixed slot, the upper end at the inside both ends of drive frame is seted up to the fixed slot, and the top and the bottom of the inside one end of fixed slot have seted up the spout, electrically conductive groove is installed to the inside one end of spout, and the inside sliding connection of spout has electrically conductive slider, the inside sliding connection of fixed slot of electrically conductive slider one end has the slide, and the equidistant magnet of installing of upper end and the lower extreme of slide one end and the inside one end of fixed slot, the equidistant auxiliary wheel that extends to the drive frame outside that is provided with of upper end and lower extreme that magnet one end was kept away from to the slide.

Preferably, the shape of the track beam is a mountain shape, and the track beam is symmetrically distributed about the vertical central axis of the cross beam.

Preferably, the anti-falling mechanism comprises a gear, a pneumatic telescopic rod, a protective groove, a movable plate, a thrust block and a counterweight blocking rod, the gear is installed at one end, away from the servo motor, of the winch barrel, the protective groove is installed at one end of the lifting box at one end of the gear, the pneumatic telescopic rod is installed at the middle position of one end of the protective groove, the output end of the pneumatic telescopic rod extends to the inside of the protective groove and is connected with the movable plate in a sliding mode, the upper end of one end of the movable plate is hinged to the counterweight blocking rod, and the thrust block is installed at one end of the movable plate below the counterweight blocking rod.

Preferably, the length of the counterweight blocking rod is smaller than that of the inside of the protective groove, and the shape of the top view of the counterweight blocking rod is T-shaped.

Preferably, clean the structure and include brush, locating hole, installation piece, connecting rod, mounting groove and locating pin, the installation piece is installed inside the track roof beam of driving frame one side lower extreme, and the inside one side of keeping away from the driving frame of installation piece has seted up the mounting groove, the installation piece one end of mounting groove one end is provided with the locating pin, and the inside connecting rod that extends to the installation piece outside that is provided with of mounting groove, the locating hole with locating pin matched with has been seted up to the inside one end upper end of connecting rod, and the brush is installed to the bottom of connecting rod.

Preferably, the length of the brush is equal to the length inside the track beam, and a welding integrated structure is formed between the top end of the brush and the bottom end of the connecting rod.

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

(1) by arranging the auxiliary wheels, the fixed grooves and the magnets, in the process of moving the driving trolley left and right, the mutual repulsion force between the magnets is utilized to enable the sliding plate to move to drive the auxiliary wheels to be attached to the inner wall of the track beam, the movement of the driving trolley is limited in an auxiliary sliding manner, the moving stability of the driving trolley is improved, the phenomenon of derailment caused by the inclination of the driving trolley is avoided, meanwhile, when the driving trolley inclines to one side when the driving wheel is seriously abraded, the repulsive force between the magnets can be overcome by the sliding plate due to the abutting force of the auxiliary wheels and the track beam, the sliding plate is further moved to drive the conductive sliding block to slide until the conductive sliding block is contacted with the conductive groove, the signal is further transmitted to the PLC controller in the cab, a driver is timely informed, the driver is convenient to overhaul and replace the driving wheel in time, the phenomenon of derailment caused by serious abrasion of the driving wheel is avoided, and the accident of derailment is avoided, the use safety of the crane is ensured, and the probability of accidents is reduced;

(2) by arranging the anti-falling mechanism, before hoisting, the pneumatic telescopic rod is started to drive the movable plate to move, so that one end of the balance weight blocking rod is close to the gear, then the hoisting drum rotates positively to drive the goods to ascend, meanwhile, the gear is driven to rotate by the rotation of the winding drum, so that the balance weight stop lever deflects upwards and then returns to the original position under the action of gravity, further, when the goods descend due to accidental accidents in the hoisting process, the goods descend to enable the hoisting drum to rotate reversely, thereby enabling the gear to rotate reversely to drive the counterweight blocking rod to deflect downwards, limiting the deflection of the counterweight blocking rod by arranging the thrust block, further limiting the rotation of the gear, and enabling the winding drum not to rotate, the falling of the goods is limited, the goods are prevented from directly falling onto the ground, the falling prevention performance of the crane is realized, the damage of the goods caused by accidents is reduced, and meanwhile, the harm to workers caused by the falling of the goods can also be avoided;

(3) through being provided with and clean structure and carriage, remove the in-process about driving trolley, can drive the brush and remove, and then clean the impurity of driving trolley both sides track roof beam inside and pile up, avoid impurity and drive wheel direct contact, influence the stability that driving trolley removed then, seriously lead to the emergence of incident, can regularly stimulate the locating pin simultaneously and make it break away from the locating hole completely, pull the connecting rod again and break away from the mounting groove and can take off the brush and wash, guarantee its self cleanliness factor, avoid its self too dirty and influence to clean the effect, thereby influence the normal work of hoist.

Drawings

Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;

fig. 2 is a schematic side view of the cross-sectional structure of the present invention;

fig. 3 is a schematic top view of the cross-sectional structure of the present invention;

FIG. 4 is a schematic view of the lifting box according to the present invention;

fig. 5 is an enlarged schematic view of a portion a of fig. 1 according to the present invention;

fig. 6 is a schematic view of the top enlarged structure of the cleaning structure of the present invention.

In the figure: 1. a cross beam; 2. a track beam; 3. a cab; 4. an anti-drop mechanism; 401. a gear; 402. a pneumatic telescopic rod; 403. a protective bath; 404. a movable plate; 405. a thrust block; 406. a counterweight shift lever; 5. lifting the box; 6. a hoisting drum; 7. a servo motor; 8. driving the trolley; 9. a cleaning structure; 901. a brush; 902. positioning holes; 903. mounting blocks; 904. a connecting rod; 905. mounting grooves; 906. positioning pins; 10. a steel cord; 11. a hook; 12. a driving frame; 13. a drive wheel; 14. a triangular bracket; 15. a PLC controller; 16. an auxiliary wheel; 17. a slide plate; 18. a conductive slider; 19. a conductive slot; 20. fixing grooves; 21. a magnet; 22. a chute.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1-6, a gantry crane with an anti-derailing device comprises a beam 1, a driving trolley 8, a triangular support 14, an anti-falling mechanism 4 for preventing goods from falling during lifting, a cleaning structure 9 for reducing the influence of impurities on operation and an anti-derailing structure for generating potential safety hazards;

the top end of the triangular support 14 is transversely provided with a beam 1, two ends inside the beam 1 are transversely provided with track beams 2, the bottom end of the beam 1 at one side of the triangular support 14 is provided with a cab 3, a PLC (programmable logic controller) 15 is arranged inside the cab 3, the type of the PLC 15 can be FX3SA-10MT-CM, a driving trolley 8 is arranged above the beam 1, four corners at the bottom end of the driving trolley 8 are provided with driving frames 12 matched with the track beams 2, four corners at the bottom end inside the driving frames 12 are provided with driving wheels 13, and an anti-derailment structure is arranged at the upper ends of two ends inside the driving frames 12;

the cleaning structure 9 is arranged in the track beam 2 at the two ends of the lower end of one side of the driving frame 12;

the two ends of the top end of the driving trolley 8 are provided with lifting boxes 5, a servo motor 7 is arranged in the middle of one side of each lifting box 5, the type of each servo motor 7 can be F-3420-1, the output end of each servo motor 7 is provided with a hoisting drum 6 extending into each lifting box 5 through a rotating shaft, the surface of each hoisting drum 6 is wound with a steel cable 10, one end of each steel cable 10 is provided with a lifting hook 11, and the anti-falling mechanism 4 is arranged on one side, far away from each servo motor 7, in each lifting box 5;

referring to fig. 1-6, a gantry crane with an anti-derailment device further includes an anti-derailment structure, the anti-derailment structure includes a fixing groove 20, the fixing groove 20 is opened at the upper end of the two ends inside the driving frame 12, and the top end and the bottom end of one end inside the fixing groove 20 are provided with sliding grooves 22, one end inside the sliding groove 22 is provided with a conductive groove 19, and the inside of the sliding groove 22 is slidably connected with a conductive slider 18, the inside of the fixing groove 20 at one end of the conductive slider 18 is slidably connected with a sliding plate 17, and the upper end and the lower end of one end of the sliding plate 17 and one end inside the fixing groove 20 are provided with magnets 21 at equal intervals, and the upper end and the lower end of one end of the sliding plate 17 away from the magnets 21 are provided with auxiliary wheels 16 extending to the outside of the driving frame 12 at equal intervals;

the track beam 2 is in a mountain shape, and the track beam 2 is symmetrically distributed about the vertical central axis of the cross beam 1;

specifically, as shown in fig. 1, fig. 2 and fig. 5, in the process of moving the driving trolley 8 left and right, the mutual repulsion between the magnets 21 is utilized to make the sliding plate 17 move to drive the auxiliary wheel 16 to cling to the inner wall of the track beam 2, to perform auxiliary sliding limit on the movement of the driving trolley 8, to improve the moving stability of the driving trolley 8, and to avoid the derailing phenomenon caused by the inclination of the driving trolley 8, meanwhile, when the driving trolley 8 inclines to one side when the driving wheel 13 is seriously worn, the repulsion between the auxiliary wheel 16 and the track beam 2 can be overcome by the sliding plate 17, so that the sliding plate 17 moves to drive the conductive sliding block 18 to slide until contacting with the conductive groove 19, and then the signal is transmitted to the PLC controller 15 inside the cab 3, so as to inform the driver in time, facilitate the timely overhaul and replacement of the driving wheel, and avoid the derailing phenomenon caused by the serious wear of the driving wheel 13, the safety of this hoist use is guaranteed, and the stability that 8 removal of driving trolley were further improved to the track roof beam 2 of mountain type simultaneously.

Example 2: the anti-falling mechanism 4 comprises a gear 401, a pneumatic telescopic rod 402, a protective groove 403, a movable plate 404, a thrust block 405 and a counterweight blocking rod 406, the gear 401 is installed at one end of the hoisting drum 6 far away from the servo motor 7, the protective groove 403 is installed at one end of the hoisting box 5 at one end of the gear 401, the pneumatic telescopic rod 402 is installed at the middle position of one end of the protective groove 403, the pneumatic telescopic rod 402 can be XTL100 in type, the output end of the pneumatic telescopic rod 402 extends into the protective groove 403 and is connected with the movable plate 404 in a sliding manner, the counterweight blocking rod 406 is hinged to the upper end of one end of the movable plate 404, and the thrust block 405 is installed at one end of the movable plate 404 below the counterweight blocking rod 406;

the length of the counterweight blocking rod 406 is less than the length inside the protection groove 403, and the shape of the counterweight blocking rod 406 in a top view is T-shaped;

specifically, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, before the lifting, the pneumatic telescopic rod 402 is started to drive the movable plate 404 to move, so that one end of the counterweight blocking rod 406 is close to the gear 401, and then the hoisting drum 6 rotates positively to drive the goods to rise, meanwhile, the winding drum 6 rotates to drive the gear 401 to rotate, so that the counterweight blocking rod 406 deflects upwards and then returns to the original position under the action of gravity, further, when the goods descend due to an accident in the hoisting process, the goods descend to enable the hoisting drum 6 to rotate reversely, further, the gear 401 rotates reversely to drive the counterweight blocking rod 406 to deflect downwards, the thrust block 405 is arranged to limit the deflection of the counterweight blocking rod 406, and further the gear 401 rotates to limit, so that the winding drum 6 cannot rotate, the goods fall to be limited, the goods are prevented from directly falling to the ground, and the falling prevention performance of the crane is achieved.

Example 3: the cleaning structure 9 comprises a brush 901, a positioning hole 902, an installation block 903, a connecting rod 904, an installation groove 905 and a positioning pin 906, wherein the installation block 903 is installed inside the track beam 2 at the lower end of one side of the driving frame 12, the installation groove 905 is formed in one side, far away from the driving frame 12, inside the installation block 903, the positioning pin 906 is arranged at one end of the installation block 903 at one end of the installation groove 905, the connecting rod 904 extending to the outside of the installation block 903 is arranged inside the installation groove 905, the positioning hole 902 matched with the positioning pin 906 is formed in the upper end of one end inside the connecting rod 904, and the brush 901 is installed at the bottom end of the connecting rod 904;

the length of the brush 901 is equal to the length of the inside of the track beam 2, and the top end of the brush 901 and the bottom end of the connecting rod 904 are in a welding integrated structure;

specifically, as shown in fig. 1, fig. 3 and fig. 6, in the process of moving about drive trolley 8, can drive brush 901 and remove, and then clean the inside impurity of drive trolley 8 both sides track roof beam 2 and pile up, avoid impurity and drive wheel 13 direct contact, can regularly stimulate locating pin 906 simultaneously and make it break away from locating hole 902 completely, pull connecting rod 904 again and break away from mounting groove 905 and can take off brush 901 and wash, guarantee its self cleanliness factor, avoid its self too dirty and influence and clean the effect.

The output end of the PLC 15 is electrically connected with the pneumatic telescopic rod 402 and the input end of the servo motor 7 through a lead.

The working principle is as follows: when the device is used, firstly, an external power supply is connected, then the pneumatic telescopic rod 402 is started, the movable plate 404 moves to drive the counterweight blocking rod 406 to completely enter the protection groove 403, then the servo motor 7 is started to drive the hoisting drum 6 to rotate reversely, further, the steel cable 10 is loosened, the lifting hook 11 descends, then, a worker hangs a cargo on the lifting hook 11, then the pneumatic telescopic rod 402 is started to drive the movable plate 404 to move, further, one end of the counterweight blocking rod 406 is close to the gear 401, then the servo motor 7 is started to drive the hoisting drum 6 to rotate forwards, further, the cargo ascends, meanwhile, the hoisting drum 6 rotates to drive the gear 401 to rotate, the counterweight blocking rod 406 deflects upwards, then, under the action of gravity, the original position is recovered, further, when an accident happens carelessly in the hoisting process, and the cargo descends, the hoisting drum 6 can rotate backwards, further, the gear 401 can rotate reversely, the counterweight blocking rod 406 is driven to deflect downwards, the counterweight blocking rod 406 is deflected to be limited by the arrangement of the thrust block 405, and then the gear 401 is limited in rotation, so that the winch drum 6 cannot rotate, the falling of goods is limited, and the goods are prevented from directly falling onto the ground;

after the hoisting is completed, the driving frame 12 is moved to drive the driving trolley 8 to move through the rotation of the driving wheel 13, so as to drive the goods to move left and right, meanwhile, the sliding plate 17 is moved to drive the auxiliary wheel 16 to cling to the inner wall of the track beam 2 through the mutual repulsion force between the magnets 21, so as to perform auxiliary sliding limiting on the movement of the driving trolley 8, improve the moving stability of the driving trolley 8, avoid the phenomenon of derailment caused by the inclination of the driving trolley 8, meanwhile, when the driving trolley 8 inclines to one side when the driving wheel 13 is seriously abraded, the mutual repulsion force between the magnets 21 can be overcome by the sliding plate 17 through the mutual repulsion force between the auxiliary wheel 16 and the track beam 2, further the sliding plate 17 is moved to drive the conductive sliding block 18 to slide in the sliding groove 22 until the conductive sliding block is contacted with the conductive groove 19, further the signal is transmitted to the PLC 15 in the cab 3, so as to inform a driver in time, the driving wheel 13 is convenient to overhaul and replace in time, and derailing caused by serious abrasion of the driving wheel 13 is avoided;

in-process is moved about simultaneously drive dolly 8, can drive brush 901 and remove, and then cleans the inside impurity of drive dolly 8 both sides track roof beam 2 and pile up, avoids impurity and 13 direct contact of drive wheel, influences the stability that drive dolly 8 removed then, can regularly stimulate locating pin 906 simultaneously and make it break away from locating hole 902 completely, pulls connecting rod 904 again and breaks away from mounting groove 905 and can take off brush 901 and wash, guarantees its self cleanliness factor.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gantry crane with anticreep rail device, includes crossbeam (1), drive dolly (8) and A-frame (14), its characterized in that: the device also comprises an anti-falling mechanism (4) for preventing goods from falling off during hoisting, a cleaning structure (9) for reducing the influence of impurities on operation and an anti-derailing structure for generating potential safety hazards;

the anti-derailing device comprises a triangular support (14), a cross beam (1) is transversely installed at the top end of the triangular support (14), track beams (2) are transversely arranged at two ends of the interior of the cross beam (1), a cab (3) is installed at the bottom end of the cross beam (1) on one side of the triangular support (14), a PLC (programmable logic controller) (15) is arranged in the cab (3), a driving trolley (8) is arranged above the cross beam (1), driving frames (12) matched with the track beams (2) are installed at four corners of the bottom end of the driving trolley (8), driving wheels (13) are arranged at four corners of the bottom end of the driving frames (12), and an anti-derailing structure is arranged at the upper ends of two ends of the interior of the driving frames (12);

the cleaning structure (9) is arranged in the track beam (2) at the two ends of the lower end of one side of the driving frame (12);

the lifting box (5) is installed at the both ends on drive dolly (8) top, and lifts the intermediate position department of lifting box (5) one side and install servo motor (7), servo motor (7) output is installed through the pivot and is extended to the hoist cylinder (6) of lifting box (5) inside, and the surface winding of hoist cylinder (6) has cable wire (10), lifting hook (11) are installed to the one end of cable wire (10), anti-drop mechanism (4) set up the inside one side of keeping away from servo motor (7) of lifting box (5).

2. Gantry crane with derailment prevention device according to claim 1, wherein: the derailment prevention structure includes fixed slot (20), the upper end at the inside both ends of drive frame (12) is seted up in fixed slot (20), and the top and the bottom of the inside one end of fixed slot (20) have seted up spout (22), electrically conductive groove (19) are installed to the inside one end of spout (22), and the inside sliding connection of spout (22) has electrically conductive slider (18), the inside sliding connection of fixed slot (20) of electrically conductive slider (18) one end has slide (17), and equidistant magnet (21) of installing of upper end and the lower extreme of slide (17) one end and the inside one end of fixed slot (20), equidistant auxiliary wheel (16) that extend to drive frame (12) outside are provided with to upper end and the lower extreme that magnet (21) one end was kept away from in slide (17).

3. Gantry crane with derailment prevention device according to claim 1, wherein: the shape of the track beam (2) is mountain-shaped, and the track beam (2) is symmetrically distributed around the vertical central axis of the cross beam (1).

4. Gantry crane with derailment prevention device according to claim 1, wherein: anti-falling mechanism (4) include gear (401), pneumatic telescopic link (402), protective groove (403), fly leaf (404), thrust block (405) and counter weight shelves pole (406), gear (401) are installed in hoist section of thick bamboo (6) one end of keeping away from servo motor (7), and guard groove (403) are installed to the lifting box (5) one end of gear (401) one end, pneumatic telescopic link (402) are installed to the intermediate position department of protective groove (403) one end, and the output of pneumatic telescopic link (402) extends to protective groove (403) inside and sliding connection has fly leaf (404), the upper end of fly leaf (404) one end articulates there is counter weight shelves pole (406), and thrust block (405) are installed to fly leaf (404) one end of counter weight shelves pole (406) below.

5. Gantry crane with derailment prevention device according to claim 4, wherein: the length of the counterweight blocking rod (406) is less than the length inside the protective groove (403), and the shape of the counterweight blocking rod (406) in a top view is T-shaped.

6. Gantry crane with derailment prevention device according to claim 1, wherein: cleaning structure (9) and including brush (901), locating hole (902), installation piece (903), connecting rod (904), mounting groove (905) and locating pin (906), installation piece (903) is installed inside track roof beam (2) of driving frame (12) one side lower extreme, and installs the inside one side of keeping away from driving frame (12) of piece (903) and seted up mounting groove (905), the installation piece (903) one end of mounting groove (905) one end is provided with locating pin (906), and inside connecting rod (904) that extend to installation piece (903) outside that is provided with of mounting groove (905), inside one end upper end of connecting rod (904) is seted up with locating pin (906) matched with locating hole (902), and brush (901) are installed to the bottom of connecting rod (904).

7. Gantry crane with derailment prevention device according to claim 6, wherein: the length of the brush (901) is equal to the length of the inside of the track beam (2), and a welding integrated structure is formed between the top end of the brush (901) and the bottom end of the connecting rod (904).