CN107915144A

CN107915144A - A kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley

Info

Publication number: CN107915144A
Application number: CN201610871450.7A
Authority: CN
Inventors: 谢新华
Original assignee: Fuzhou Gulou Automatic Equipment Co Ltd
Current assignee: Fuzhou Gulou Automatic Equipment Co Ltd
Priority date: 2016-10-06
Filing date: 2016-10-06
Publication date: 2018-04-17

Abstract

This application discloses a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley, including two end carriages, two girders, end carriage to be equipped with safety hook；Track is equipped with below girder；A lifting truck is connected between two tracks；Suspension end carriage is also connected with track；The both ends of suspension end carriage respectively connect driving mechanism；Trolley frame, which is connected to, between two suspension end carriages forms suspension end carriage trolley；Anti- roller devices are also connected with trolley frame；A pair of of driving wheel all band gears in driving mechanism；Reducing motor output shaft band gear shaft in driving mechanism engages connection with a driving wheel；A pair of of driving wheel is connected by transition gear and transmission shaft；Suspension end carriage trolley is equipped with rotating mechanism；Sunpender axis one end in rotating mechanism is connected with cantilever member；Cantilever member is equipped with rotary limit device；Electric block is installed on cantilever member can simultaneously move back and forth along outrigger horizontal；Cantilever beam is in below two girders and can rotate.

Description

A kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley

Technical field

This application involves crane field, more particularly to a kind of bridge-type cantilever with lifting truck and suspension end carriage trolley Crane.

Background technology

Existing bridge crane is applied in Workshop, and many machine tools have been controlled in some workshops and have been processed life Production, product and raw material are required for Real-Time Transport to next door workshop or other departments；The suspension hook of crane on workshop is from trolley Upper hang carries out lifting cargo, and trolley can only be run back and forth along crane twin beams, and crane can only be along workshop both sides Run back and forth across the cart track on column, the cargo scope that such crane hook can lift is in two, workshop cart track Within the plane that two-end-point is surrounded, when being in the cargo of this horizontal edge needs lifting, suspension hook just produces oblique pull, then from this The article (such as workshop outdoors, across outer) of far point cannot lift outside a plane, can only turn at this time by other transporting equipments Fortune, usually drives workshop into by automobile and lifting cargo is carried out under suspension hook, some cars are opened to come in this workshop and next door workshop Between be laterally laid with track, allow trolley special to reach suspension hook and get off to join cargo, some is in workshop doorway (or workshop passageway) A special cantilever crane is set up, scheduling is transported through to the cargo outside workshop, first cargo is lifted up into and is hung in this workshop crane The place that hook is got at, then again by crane this cargo handling to the other stations in workshop, what is used under this operating mode shows There is bridge crane, cannot directly join cargo with next door workshop, must be brought quite not by other transporting equipment schedule jobs Just, manpower and materials are also produced to waste.

The content of the invention

The application purpose is to provide a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley, described Heavy-duty machine is not only able in this workshop handling object up and down, additionally it is possible to lifts by crane this workshop directly below across outer by cart support rail beam Next door place cargo, also can be in this workshop in cart running track direction direct lifting cargo in place outdoors, it is not necessary to by Other transporting equipment transhipments, improve efficiency, and cargo can be unloaded the place for being placed on workshop needs, and can make in the workshop of low roofing With；The crane is not tumbled, securely and reliably；The crane can also facilitate handling elongate article.

To reach above-mentioned purpose, the application is realized using following technology：

A kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley, including two end carriages, 1, two girder 2 The double girder bridge of composition；It is characterized in that：Two of two end carriages 1 respectively connects a safety hook 11；Two girders 2 Lower section is designed with track 21；The track is made of I-steel or H profile steel；A lifting truck is connected on two tracks 01；The lifting truck is equipped with electric block hoisting mechanism；Suspension end carriage 32 is also connected with the track 21；The suspended end The both ends of beam respectively connect driving mechanism 34；Trolley frame 31, which is connected to, between two suspension end carriages forms suspension end carriage trolley 3； Anti- roller devices 35 are also connected with the trolley frame 31；The all band single-wheel edge of a pair of of driving wheel 342 in the driving mechanism 34, and Band gear on wheel rim；341 output shaft of decelerating motor band gear shaft in the driving mechanism engages connection with a driving wheel；Institute State a pair of of driving wheel 342 and passing power is connected by transition gear and transmission shaft 343；The suspension end carriage trolley is equipped with Rotating mechanism 4；42 one end of sunpender axis in the rotating mechanism is connected with cantilever member 5；The cantilever member is equipped with rotation Turn limiting device 58；Electric block 10 is installed, electric block can be moved back and forth along outrigger horizontal on cantilever member；It is described outstanding Arm beam is in operation outside extended workshop below two girders, and can rotate in the horizontal plane.

Wherein, the suspension end carriage 32 includes the Ji of left channel steel 321, right channel steel 322, the left channel steel and right channel steel All open up connecting hole 323 on edge to be used to connect trolley frame, sealing plate 324 with holes is all welded in its termination；321 liang of the left channel steel End is designed with axle hole 3211 and motor input hole 3212, welds motor before the motor input hole on the left channel steel and consolidates Fixed board 325, the motor fixing plate are equipped with mounting hole 3251；322 both ends of right channel steel are designed with axle hole 3221, this Some holes is used to connect driving mechanism；The left channel steel and right channel steel both ends are connected by bolt with U-board 326 respectively.

Wherein, the anti-roller devices 35 include roller 351, roller shaft 352, bearing 353；The bearing is by steel plate system U-shape is made, slot hole 3531 is opened up in the horizontal direction on the side panel of the bearing both sides；351 endoporus both ends of the roller difference Equipped with bearing 354 and hole baffle ring 355；352 both ends of roller shaft are designed with stop notch 3521；The roller shaft passes through axle bumper Circle 356 and two bearings 354 connect roller；The roller shaft is by locking plate 357 and is bolted to above-mentioned On the slot hole of bearing 353.

Wherein, the rotating mechanism 4 includes driving device 40, bearing block 41, sunpender axis 42, and the bearing block 41 is fixed It is connected on trolley frame 31；The lower end branch sleeve 43 of the inner hole of bearing seat；The middle part of sunpender axis 42 is equipped with the shaft shoulder 425； Described sunpender axis one end is equipped with screw thread, and screw thread is equipped with is used for locking connection by the through hole 422 of diameter；The sunpender axis passes through 41 center of bearing block is connected with thrust bearing 45, and the lower floor of the thrust bearing is connected to the top of bearing block, its upper strata is with preventing Loose nut A44 connections, the stop nut A bands dust cover 441, stop nut A is connected with sunpender axle thread, and passes through bolt 46 Diameter through stop nut A and sunpender axis connects；The driving device 40 combined by motor with vertical type speed reducer (change gear) and Into the driving device is connected on gear reducer bearing 401, and the gear reducer bearing is fixed on trolley frame 31；Described Driving device output shaft connects one end of above-mentioned sunpender axis by shaft coupling 48.

Wherein, the cantilever member 5 includes cantilever beam 51, Holder for hanging household utensiles 52；Described one setting connecting hole of Holder for hanging household utensiles 521, the connecting hole is interior to be equipped with keyway 522；The Holder for hanging household utensiles other end is equipped with operation window 523 and is used to operate connection anti-loose spiral shell It is female；The operation window of the Holder for hanging household utensiles 52 this be welded on one end of the cantilever beam 51；The cantilever beam both ends are equipped with buffering Seat 511.

Wherein, the cantilever member 5 is connected on the sunpender axis 42 of rotating mechanism by flat key 49 and stop nut B9； The stop nut B and sunpender axis is connected with bolt 99 again, and the bolt 99 is through stop nut B and sunpender axis Diameter.

Wherein, the safety hook 11 includes T-shaped hook seat 111, L-shaped safety hook 112；The T-shaped hooks to be set on the seat board of seat There is mounting hole 1111, the T-shaped hooks seat and is equipped with horizontal slot hole 1112；Above-mentioned L-shaped safety hook includes eave tile 1121, L-shaped safety Slot hole 1122 is additionally provided with hook；The L-shaped safety hook hooks seat with the T-shaped by bolt 113 and is connected；The L-shaped safety hook On eave tile 1121 be connected with the lower surface gap of 12 upper cover plate of cart support rail beam, 121 Ji edge.

The beneficial effect of the application is as described below：

The suspension hook on lifting truck (01) in the application can be usually used in this either inside cargo hoisting, because lifting cargo Center of gravity do not produce tilting moment in the underface of crane, crane and trolley, work can be improved using the operating mode of high speed Make efficiency, and available for lifting large-tonnage object；Lifting truck is acted on available for main lifting.

The cantilever beam of end carriage trolley (3) is hung in the application crane can stretch out between crane locomotive to outdoors or to next door Workshop directly lifts cargo；The next door workshop cargo of cart traffic direction endpoint can be not only lifted by crane, and cart can be lifted by crane The cargo in running track line side workshop；Since the cantilever beam of the application is arranged at below suspension end carriage trolley and girder, cantilever Beam can stretch into the direct lifting cargo in next door workshop by support rail beam lower section, or can directly stretch out the workshop of cart traffic direction outdoors Operation, because the door top in usually workshop can reach height where the support rail beam in this workshop substantially, therefore present techniques feature can To realize the application purpose；After lifting cargo, turn by movement of the electric block along cantilever beam, or by cantilever member It is dynamic, or by hanging the movement of end carriage trolley, or the movement by crane travelling mechanism, or pass through foregoing four synthesis Movement, can hang onto the cargo of lifting in the place of this workshop needs；With the next door workshop of workshop surrounding or workshop outdoors Need not can be borrowed during cargo handing-over the transhipment of other transporting equipments, improve efficiency.

Track (21) is set below the girder in the application crane, and suspension end carriage trolley is suspended on girder track, makes Its installation space position reduces, and is particularly suitable for roofing with crane apart from small workshop.

The suspension hook on lifting truck (01) in the application crane and the electric block (10) on suspension end carriage trolley (3) Suspension hook, which is used cooperatively, can facilitate handling elongate article.

End carriage both sides in the application crane all set safety hook (11), crane can be avoided to tumble, and ensure safety；When When cantilever beam may overload, end carriage is while upwarp, and the eave tile of L-shaped safety hook can catch on the upper cover plate of cart support rail beam (12) at this time Ji Yuan, avoids crane from tumbling and ensures safety；Safety hook is connected with end carriage, in-site installation convenient construction, assembled in situ It is not required to be welded, avoids damage to equipment surface paint；T-shaped on safety hook hooks seat (111) and L-shaped safety hook (112) company of being designed with Spreading hole, in crane in-site installation, easy to adjust relative position, easily installation is in place；When crane end carriage upwarps When, by hinged cantilever component or mobile electric cucurbit position or lift heavy can be reduced, can so change the center of gravity of crane, Ensure that stabilization avoids crane from tumbling.

The driving wheel in suspension end carriage trolley (3) driving mechanism in the application is sleeved on the edge of track (21) both sides Ji, is protected Card trolley does not drop, so as to ensure that crane is safe to use；A pair of of driving wheel is all driven by motor, and the driving force of operation is big, is passed It is good to pass power effect；Hang and two sets of driving mechanisms are set on end carriage, being advantageous in that can avoid single driving from being possible to because of trolley on one side Somewhat upwarp adhesion wheel not rail and produce can't run phenomenon, double drive ensure that trolley travelling is smooth；Hang end carriage trolley It can be moved back and forth along girder both ends, be suitable for big width workshop and use；Hang end carriage trolley and electric block and whirler Power supply needed for structure can run power supply back and forth along cable wire rail (124) by lashed cable (123) with running trolley；Cable wire rail both ends point Two are not connected to and chooses electric frame (121), by adjusting the appropriate height of electric frame is chosen, ensure that lashed cable most preferably hangs position.

Driving mechanism is installed on inside suspension end carriage in the application, and suspension end carriage is overall high when being connected with the track under girder Spend small, so entirely suspension end carriage trolley swings small, stablizes；The anti-roller devices set on trolley frame can limit suspension end carriage While the degree upwarped, the roller in anti-roller devices can be pressed in below track (21) trolley, on counter suspension end carriage trolley Stick up, so that it is smooth to keep trolley travelling to stablize.

Bearing block and sunpender axis connection in the application rotating mechanism bear gravity by thrust bearing, and thrust bearing is installed on Bearing block top, it is easy to disassemble；The inner hole structure of bearing block is simply easy to process；Sleeve (43) makees sliding bearing for wear-resistant material Use, reduce the fit clearance of sunpender axis, increase rotational stabilization, increase the concentricity of driving mechanism, cantilever member, which rotates, to be saved Power；Stop nut A band dust covers (441) give bearing proofing dust and protecting, while can seal the butter in bearing；Stop nut A is with hanging After bar axis connection, then connected by the diameter of bolt (46) through stop nut A and sunpender axis, play anti-loose effect, protect Demonstrate,prove rotating mechanism safety；Driving device output shaft in rotating mechanism is flexible by shaft coupling (48) and sunpender axis connection, increase Degree, improves the malalignment regulating power between driving device and sunpender axis.

Cantilever beam in the application, which is provided at both ends with buffing pad, can avoid electric block from moving back and forth impact along cantilever beam Or overtravel；Rotary limit device (58) is equipped between cantilever member and suspension end carriage trolley, cantilever beam can be avoided excessively to rotate, Be no more than the rotations of 360 degree angles, prevent the cable (6) of electric block be wrapped on the Holder for hanging household utensiles in cantilever member (52) and by Pull apart because the cable (6) of electric block be from suspension end carriage trolley on junction box draw it is ensuing；Cantilever member and sunpender After axis connection, after positioning is connected with sunpender axle thread by stop nut B, then with bolt (99) stop nut B and sunpender are passed through The diameter of axis connects, and avoids stop nut B from loosening, securely and reliably.

Brief description of the drawings

Fig. 1 is the application structural front view；

Fig. 2 is the side view of Fig. 1；

Fig. 3 is the top view of Fig. 1；

Fig. 4 is the driving mechanism partial schematic diagram in the application；

Fig. 5 is that end carriage schematic diagram is hung in the application；

Fig. 6 is anti-roller devices front view in the application；

Fig. 7 is the side view of Fig. 6；

Fig. 8 is F partial enlarged views in Fig. 1；

Fig. 9 is cantilever member schematic diagram in the application；

Figure 10 is safety hook structure diagram in the application.

Embodiment

In conjunction with attached drawing, the application embodiment is described in detail：

As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley, bag Include the double girder bridge that two end carriages, 1, two girder 2 forms；Two of two end carriages 1 respectively connects a safety hook 11；Institute State two lower sections of girder 2 and be designed with track 21；The track is made of I-steel or H profile steel；One is connected on two tracks Platform lifting truck 01；The lifting truck is equipped with electric block hoisting mechanism；Suspension end carriage 32 is also connected with the track 21； The both ends of the suspension end carriage respectively connect driving mechanism 34；Trolley frame 31, which is connected to, between two suspension end carriages forms suspension End carriage trolley 3；Anti- roller devices 35 are also connected with the trolley frame 31；A pair of of driving wheel 342 in the driving mechanism 34 is all Band single-wheel edge, and band gear on wheel rim；341 output shaft of decelerating motor band gear shaft and a driving wheel in the driving mechanism Engagement connection；The pair of driving wheel 342 connects passing power by transition gear and transmission shaft 343；The suspended end Beam trolley is equipped with rotating mechanism 4；42 one end of sunpender axis in the rotating mechanism is connected with cantilever member 5；The cantilever Component is equipped with rotary limit device 58；Electric block 10 is installed, electric block can come along outrigger horizontal on cantilever member Backhaul dynamic；The cantilever beam is in operation outside extended workshop below two girders, and can rotate in the horizontal plane.

As shown in figure 5, the suspension end carriage 32 includes left channel steel 321, right channel steel 322, the left channel steel and right groove All open up connecting hole 323 on the Ji edge of steel to be used to connect trolley frame, sealing plate 324 with holes is all welded in its termination；The left groove 321 both ends of steel are designed with axle hole 3211 and motor input hole 3212, are welded on the left channel steel before the motor input hole Motor fixing plate 325 is connect, the motor fixing plate is equipped with mounting hole 3251；322 both ends of right channel steel are designed with wheel shaft Hole 3221, this some holes are used to connect driving mechanism；The left channel steel and right channel steel both ends pass through bolt and U-board 326 respectively Connection.

As shown in Figure 6, Figure 7, the anti-roller devices 35 include roller 351, roller shaft 352, bearing 353；The branch Seat is fabricated to U-shape by steel plate, and slot hole 3531 is opened up in the horizontal direction on the side panel of the bearing both sides；In the roller 351 Hole both ends are respectively provided with bearing 354 and hole baffle ring 355；352 both ends of roller shaft are designed with stop notch 3521；The roller Axis connects roller by shaft retaining ring 356 and two bearings 354；The roller shaft passes through locking plate 357 and bolt It is connected on the slot hole of above-mentioned bearing 353.

As shown in figure 8, the rotating mechanism 4 includes driving device 40, bearing block 41, sunpender axis 42, the bearing block 41 are fixedly connected on trolley frame 31；The lower end branch sleeve 43 of the inner hole of bearing seat；The middle part of sunpender axis 42 is equipped with axis Shoulder 425；Described sunpender axis one end is equipped with screw thread, and screw thread is equipped with is used for locking connection by the through hole 422 of diameter；The sunpender Axis is connected through 41 center of bearing block with thrust bearing 45, and the lower floor of the thrust bearing is connected to the top of bearing block, thereon Layer is connected with stop nut A44, and the stop nut A bands dust cover 441, stop nut A is connected with sunpender axle thread, and is passed through The diameter of bolt 46 through stop nut A and sunpender axis connects；The driving device 40 is by motor and vertical type speed reducer (change gear) It is composed, the driving device is connected on gear reducer bearing 401, and the gear reducer bearing is fixed on trolley frame 31； The driving device output shaft connects one end of above-mentioned sunpender axis by shaft coupling 48.

The cantilever member 5 is connected on the sunpender axis 42 of rotating mechanism by flat key 49 and stop nut B9；It is described Stop nut B and sunpender axis connected again with bolt 99, and the bolt 99 is through the straight of stop nut B and sunpender axis Footpath.

As shown in figure 9, the cantilever member 5 includes cantilever beam 51, Holder for hanging household utensiles 52；The Holder for hanging household utensiles one sets connection Hole 521, the connecting hole is interior to be equipped with keyway 522；The Holder for hanging household utensiles other end is equipped with operation window 523 and is used to operate connection anti-loose Nut；The operation window of the Holder for hanging household utensiles 52 this be welded on one end of the cantilever beam 51；The cantilever beam both ends are equipped with slow Red seat 511.

As shown in Figure 10, the safety hook 11 includes T-shaped hook seat 111, L-shaped safety hook 112；The T-shaped hooks the seat of seat Plate is equipped with mounting hole 1111, and the T-shaped hooks seat and is equipped with horizontal slot hole 1112；Above-mentioned L-shaped safety hook includes eave tile 1121, L Slot hole 1122 is additionally provided with shape safety hook；The L-shaped safety hook hooks seat with the T-shaped by bolt 113 and is connected；The L-shaped Eave tile 1121 on safety hook is connected with the lower surface gap of 12 upper cover plate of cart support rail beam, 121 Ji edge.

Claims

1. a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley, including two end carriages (1), two girders (2) double girder bridge of composition；It is characterized in that：Two of two end carriages (1) respectively connects a safety hook (11)；Described two Track (21) is designed with below bar girder (2)；The track is made of I-steel or H profile steel；Connect on two tracks (21) Connect a lifting truck (01)；The lifting truck is equipped with electric block hoisting mechanism；It is also connected with hanging on the track (21) Hang end carriage (32)；The both ends of the suspension end carriage respectively connect driving mechanism (34)；It is connected between two suspension end carriages small Vehicle frame (31) forms suspension end carriage trolley (3)；Anti- roller devices (35) are also connected with the trolley frame (31)；The driving mechanism (34) a pair of of driving wheel (342) all band single-wheel edge, and band gear on wheel rim on；Decelerating motor in the driving mechanism (341) output shaft band gear shaft engages connection with a driving wheel；The pair of driving wheel (342) passes through transition gear and transmission Axis (343) connects passing power；The suspension end carriage trolley is equipped with rotating mechanism (4)；In the rotating mechanism Sunpender axis (42) one end is connected with cantilever member (5)；The cantilever member is equipped with rotary limit device (58)；On cantilever member Electric block (10) is installed, electric block can be moved back and forth along outrigger horizontal；The cantilever beam is in two girders Operation outside the extended workshop in lower section, and can rotate in the horizontal plane.

2. a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley according to claim 1, its feature It is：The suspension end carriage (32) includes the Ji edge of left channel steel (321), right channel steel (322), the left channel steel and right channel steel On all open up connecting hole (323), sealing plate with holes (324) is all welded in its termination；Described left channel steel (321) both ends are designed with taking turns Axis hole (3211) and motor input hole (3212), weld motor fixing plate on the left channel steel before the motor input hole (325), the motor fixing plate is equipped with mounting hole (3251)；Described right channel steel (322) both ends are designed with axle hole (3221)；The left channel steel and right channel steel both ends are connected by bolt with U-board (326) respectively.

3. a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley according to claim 1, its feature It is：The anti-roller devices (35) include roller (351), roller shaft (352), bearing (353)；The bearing is by steel plate system U-shape is made, opens up slot hole (3531) on the side panel of the bearing both sides in the horizontal direction；Roller (351) the endoporus both ends It is respectively provided with bearing (354) and hole baffle ring (355)；Roller shaft (352) both ends are designed with stop notch (3521)；The rolling Wheel shaft connects roller by shaft retaining ring (356) and two bearings (354)；The roller shaft passes through locking plate (357) and it is bolted on the slot hole of above-mentioned bearing (353).

4. a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley according to claim 1, its feature It is：The rotating mechanism (4) includes driving device (40), bearing block (41), sunpender axis (42), and the bearing block (41) is solid Surely it is connected on trolley frame (31)；The lower end branch sleeve (43) of the inner hole of bearing seat；It is equipped with the middle part of the sunpender axis (42) The shaft shoulder (425)；Described sunpender axis one end is equipped with screw thread, and screw thread is equipped with the through hole (422) by diameter；The sunpender axis passes through Bearing block (41) center is connected with thrust bearing (45), and the lower floor of the thrust bearing is connected to the top of bearing block, its upper strata It is connected with stop nut A (44), the stop nut A band dust covers (441), stop nut A is connected with sunpender axle thread, and is led to The diameter for crossing bolt (46) through stop nut A and sunpender axis connects；The driving device (40) by motor with it is vertical Gear reducer is composed, and the driving device is connected on gear reducer bearing (401), and the gear reducer bearing is fixed on trolley On frame (31)；The driving device output shaft connects one end of above-mentioned sunpender axis by shaft coupling (48).

5. a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley according to claim 1, its feature It is：The cantilever member (5) includes cantilever beam (51), Holder for hanging household utensiles (52)；Described one setting connecting hole of Holder for hanging household utensiles (521), it is equipped with keyway (522) in the connecting hole；The Holder for hanging household utensiles other end is equipped with operation window (523)；The Holder for hanging household utensiles (52) this head of operation window is welded on one end of the cantilever beam (51)；The cantilever beam both ends are equipped with buffing pad (511).

6. a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley according to claim 1, its feature It is：The cantilever member (5) is connected on the sunpender axis (42) of rotating mechanism by flat key (49) and stop nut B (9)； The stop nut B and sunpender axis are connected with bolt (99) again, and the bolt (99) passes through stop nut B and sunpender The diameter of axis.

7. a kind of bridge-type cantilever crane with lifting truck and suspension end carriage trolley according to claim 1, its feature It is：The safety hook (11) includes T-shaped and hooks seat (111), L-shaped safety hook (112)；The seat board that the T-shaped hooks seat is equipped with Mounting hole (1111), the T-shaped hook seat and are equipped with horizontal slot hole (1112)；Above-mentioned L-shaped safety hook includes eave tile (1121), L-shaped Slot hole (1122) is additionally provided with safety hook；The L-shaped safety hook hooks seat with the T-shaped by bolt (113) and is connected；The L Eave tile (1121) on shape safety hook is connected with the lower surface gap of cart support rail beam (12) upper cover plate (121) Ji Yuan.