CN108263958A - A kind of crane with lifting truck and underslung trolley and balance weight - Google Patents

Abstract

This application discloses a kind of crane with lifting truck and underslung trolley and balance weight, the double girder bridge formed including girder, end carriage；End carriage both ends are designed with the cart actuating device and safety hook of vehicle wheel rim pulley teeth；Lifting truck and underslung trolley are connected between two tracks；The lifting truck is equipped with hook type lifting lifting device；The underslung trolley is equipped with rotating mechanism；Sunpender axis lower end in rotating mechanism is connect with the Holder for hanging household utensiles in cantilever member, upper end connection bus ring；Holder for hanging household utensiles in cantilever member is welded on one end of cantilever beam；The cantilever beam is close to Holder for hanging household utensiles one end hanging balancing weight, the other end is connected to electric block and car bumper device, the electric block can be moved along outrigger horizontal, and the cantilever beam is in operation outside extended workshop below the girder, and random angle can rotate in the horizontal plane.

Description

A kind of crane with lifting truck and underslung trolley and balance weight

Technical field

This application involves crane field more particularly to a kind of with lifting truck and underslung trolley and balance weight Heavy-duty machine.

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 back and forth be run along crane twin beams, and crane can only be along workshop both sides It is run back and forth across the cart track on column, the cargo range 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 generates oblique pull, then from this The article (such as workshop outdoors, across outer) of far point cannot lift except a plane, can only turn at this time by other transporting equipments Fortune, usually drives workshop by automobile and lifting cargo is carried out under suspension hook, some vehicles are opened to come in this workshop and next door workshop Between be laterally laid with track, trolley special is allowed to reach suspension hook and gets 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 except 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 waste is also generated.

Invention content

The application is designed to provide a kind of crane with lifting truck and underslung trolley and balance weight, the lifting Machine is not only able in this workshop handling object up and down, additionally it is possible to lift by crane this workshop directly below across outer across cart support rail beam The cargo in next door place, also can be in this workshop in cart running track direction direct lifting cargo in place outdoors, it is not necessary to by it Its transporting equipment is transported, and improves efficiency, and cargo can be unloaded the place for being placed on workshop needs, and the crane can be in low roofing Workshop uses；The crane is not tumbled, and the cantilever beam rotating speed of the crane can accurately reach user demand, and can be in level Arbitrary Rotation on face；The crane also is able to facilitate handling elongate article.

In order to achieve the above objectives, the application is realized using following technology：

A kind of crane with lifting truck and underslung trolley and balance weight, including double girder bridge 28；The twin beams bridge Frame includes end carriage 1, girder 2；It is characterized in that：1 both ends of end carriage are designed with 8 He of cart actuating device of vehicle wheel rim pulley teeth Safety hook 11；2 lower section of girder is equipped with i-beam track 21；Lifting truck 01 is connected between two tracks 21 and is hanged Hang trolley 3；The lifting truck 01 is equipped with hook type lifting lifting device；The underslung trolley 3 is equipped with rotating mechanism 4； 42 lower end of sunpender axis in the rotating mechanism is connect with the Holder for hanging household utensiles in cantilever member 5, upper end connection bus ring 9；It is described Cantilever member 5 include cantilever beam 51, Holder for hanging household utensiles 52；The Holder for hanging household utensiles 52 is welded on one end of the cantilever beam 51；It is described outstanding Arm beam is connected to electric block 10 and car bumper device 70, and position close to 52 one end hanging balancing weight 99 of Holder for hanging household utensiles, the other end Adjustable, the electric block can be moved along outrigger horizontal, and the cantilever beam is in below the girder outside extended workshop Operation, and random angle can rotate in the horizontal plane.

Wherein, the rotating mechanism 4 include driving device 40, small elevating arc 402, big elevating arc 403, bearing block 41, Sunpender axis 42；The sunpender axis is hollow shaft, and one end is equipped with screw thread, and threaded end opens up locking notch 421；The sunpender axis It is connected to inside the bearing block 41 by thrust bearing 45, the sunpender axis reconnects bearing A44 and bearing B46, the axis Hold the both ends that A and bearing B are connected to above-mentioned bearing block by bolt and fixed cover 43 and blind flange 47 respectively, the sunpender axis One end is stretched from the fixed cover center, and the other end is stretched from above-mentioned blind flange center；The bearing block 41 is connected to small On vehicle frame 31；The driving device 40 is composed of brake motor and horizontal speed-reducer, and the driving device is mounted on On trolley frame 31；The driving device output shaft is connected to small elevating arc 402, the small elevating arc with outside big elevating arc 403 Engagement connection, the big elevating arc are connected on above-mentioned sunpender axis 42.

Wherein, the cantilever member 5 is connected to the sunpender axis 42 of rotating mechanism by flat key 49 and stop nut 100 On；The stop nut and sunpender shaft end head is connected again by bolt and locking plate 110.

Wherein, the bus ring 9 can purchase electromechanical accessory, including interior insulation circle, outer insulator, interior insulation circle with It can be rotated between outer insulator and can be mutually conductive；Interior insulation circle is connected on sunpender axis 42, the electricity of conducting ring on interior insulation circle Cable is connected to electric block by hollow inside sunpender axis 42；Outer insulator is fixed by the bracket on trolley frame, external insulation Cable on body is connect with external power cord.

Wherein, the underslung trolley 3 includes trolley frame 31, driving mechanism 34, roller devices 35；The trolley frame is by steel Plate is welded or is welded by steel plate and shaped steel combination；The trolley frame both sides connect the driving mechanism described in two sets respectively 34；The driving mechanism is connected to by balance plate 32 and axis pin 33 on trolley frame；On the side of every set driving mechanism on trolley frame Side reconnects a roller devices 35；The roller devices are in immediately below track 21；The driving mechanism 34 includes motor 341st, two driving wheels, 342, two followers 343, band gear on driving wheel single-wheel edge and wheel rim, follower band single-wheel edge；Institute It states two driving wheels to be connected in left hanging plate 344, described two followers are connected on right hanging plate 345；The left hanging plate and the right side Hanging plate is connected by two studs and nut 346；Above-mentioned motor 341 carries speed reducer, motor output shaft band gear；It is described Motor 341 is connected in left hanging plate, and motor output shaft is connect simultaneously with above-mentioned two driving wheel external toothing.

Wherein, the car bumper device 70 includes fixed seat 701, buffer 702, and the fixed seat is by the steel plate side of being welded into Shape is made by rectangular steel tube；The fixed seat side opens up clip slot 7011；Welding steel 7012 above the clip slot, Threaded hole 7013 is opened up on steel plate；Bolt and stop nut 703 are connected on threaded hole；Side opens up connecting hole below the clip slot 7014；The fixed seat opens up buffer mounting hole 7015 on the side beside clip slot；Two buffers 702 connect respectively It is connected in two fixed seats 701；Two fixed seats are connected to two sides of track by screw rod 704 and nut On Ji 211.

Wherein, the cart actuating device 8, including wheel 81, axle 82, decelerating motor 83, the wheel is two-wheel Edge, one side flange of wheel are provided with the gear teeth 811；The inside wheel both sides connect bearing 84, two bearing outer ring gears respectively Circle 85 is fixed on wheel；Two bearing inner races are connected on axle 82, described axle one end branch sleeve 86, the set The outer diameter of cylinder and the other end of the axle are connected in the two side walls of end carriage 1, and fixed with baffle 87；The deceleration Motor 83 is connected on the side wall of end carriage 1, and the output shaft of the decelerating motor is connect with above-mentioned 811 external toothing of the gear teeth.

Wherein, the eave tile of the safety hook 11 is connect with the lower surface gap of 12 upper cover plate Ji edge of cart support rail beam.

The advantageous 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 of lifting cargo Center of gravity do not generate tilting moment in the underface of crane, crane and trolley, the operating mode of high speed can be used to improve work Make efficiency, and available for lifting large-tonnage object；Lifting truck is acted on available for main lifting.

The cantilever beam of underslung trolley (3) can be stretched out between crane locomotive to outdoors or to next door workshop in the application crane Directly lift cargo；The next door workshop cargo of cart traffic direction endpoint can be not only lifted by crane, and cart operation can be lifted by crane The cargo in railway line side workshop；Since the cantilever beam of the application is set to below trolley and girder, cantilever beam can pass through support rail It stretches into the direct lifting cargo in next door workshop below beam or can directly stretch out the workshop operation outdoors of cart traffic direction, because logical The door top in normal workshop can reach height where the support rail beam in this workshop substantially, therefore present techniques feature can realize the application Purpose；After lifting cargo, by movement of the electric block along cantilever beam or the rotation by cantilever member or pass through suspension The movement of trolley or by the movement of crane operating mechanism or by aforementioned four integrated motion, can be lifting Cargo hangs onto the place of this workshop needs；It can not when carrying out cargo handing-over outdoors with the next door workshop of workshop surrounding or workshop The transhipment of other transporting equipments must be borrowed, improves efficiency.

Cantilever beam one end connects electric block (10) handling weight, other end hanging balancing weight (9), the two in the application A weight balance part can reduce the tilting moment of crane, improve lifting capacity, while increase crane stability and safety Property.

Setting trolley track (21), underslung trolley are suspended on girder track, make below girder in the application crane 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 electric block (10) suspension hook on underslung trolley (3) With the use of handling elongate article can be facilitated.

Electric frame (121) is chosen equipped with two groups of moveable lashed cables (123) on the application loading bridge, and one group of connection is promoted Trolley (01) is powered, another group of connection underslung trolley (3) power supply.

Safety hook is set on end carriage in the application crane, crane can be avoided to tumble, ensures safety；When cantilever beam mistake During load, end carriage upwarps on one side, and the eave tile of safety hook (11) can catch on the upper cover plate Ji edge of cart support rail beam (12) at this time, avoid Heavy-duty machine, which is tumbled, ensures safety；Safety hook can be cut by steel plate into being connected on end carriage, and construction is most simple, at low cost.

End carriage both ends in the application crane all set cart actuating device, ensure that cart operation is smooth, avoid unilateral Because end carriage may upwarp during driving, driving wheel not rail generate idle running phenomenon；Cart actuating device (8) in the application crane In it is simple in structure, it is light-weight, in driving device most of accessory can purchased parts, price is low；It can be set on the wheel rim of wheel The gear teeth of different number can meet the different speed of service demands of user.

Underslung trolley (3) in the application can be moved back and forth along girder both ends, be suitable for big width workshop and used；Suspension Driving mechanism (34) on trolley can be in whole set procurement standarized component on the market, mating facility；Driving wheel, quilt in driving mechanism Driving wheel is connected on the edge of track (21) both sides Ji, ensures that underslung trolley is not fallen, so as to ensure that crane is safe to use；It is outstanding It hangs trolley side two sets of driving mechanisms of installation to be connected on same track, and roller devices is installed beside every set driving mechanism (35), be advantageous in that can avoid it is single drive be possible to because trolley slightly upwarp on one side adhesion wheel not rail due to the race that generates not Dynamic phenomenon, double drive ensure that trolley travelling is smooth；Roller devices can limit the degree that underslung trolley upwarps on one side, ensure that suspension is small Vehicle is stablized, and operation is smooth；Power supply can be with suspension by lashed cable (123) needed for underslung trolley and electric block and rotating mechanism Trolley runs power supply back and forth.

Cantilever beam (51) in the application cantilever member is fixedly connected with buffer in that end in Holder for hanging household utensiles (52), plays buffering and limit Position electric block effect；An adjustable car bumper device in position (70) is connected in the cantilever end of cantilever beam, effect is on car stop Buffer electric block can be avoided to move back and forth impact or overtravel along cantilever beam run, the position of this car bumper device is flexible It is adjustable, benefit be according to the cargo size cases lifted, can flexible modulation car bumper device fixed position, its essence is adjustings The effective breadth of cantilever beam, small tonnage amplitude can be big, and large-tonnage is with by a small margin；Crane is efficiently used, while ensures safety.

In car bumper device in the application there are two fixed seat (701) left and right can be general, fixed seat by steel plate weld and It is made into or by rectangular steel tube, selection is simple, easy to make, and effect is good.

The electric block cable (6) of the application crane is from the sunpender axis center in rotating mechanism by being connected to current collection Slip ring (9), cable (6), which will not be wound, not to be torn, is not required to setting rotary limit device, ensures that cantilever beam can be in the horizontal plane Arbitrary Rotation；There is a pair of of elevating arc auxiliary driving in the rotating mechanism of the application, pass through the difference of big elevating arc, small elevating arc The number of teeth is set, and can meet precise requirements of the user to the cantilever beam rotary speed of crane, avoids the logical of selection standard speed reducer The cantilever beam rotating speed and the large error of actual demand generated with speed ratio；It is driven, can made in rotating mechanism using elevating arc Driving device uses horizontal speed-reducer, easy for installation, can be directly installed on trolley frame, and can reduce mounting height.

The motor of driving device (40) in the application rotating mechanism is from brake device, and inertia rotates after avoiding parking, Stop so as to fulfill cantilever beam brake, ensure that electric hoist suspension hook point position is accurate on cantilever beam.

Bearing block and sunpender axis connection in the application rotary mechanism of crane bear lifting power, sunpender axis by thrust bearing Radial position is limited by bearing A and bearing B up and down, ensures that sunpender axis can bear very big axial force and not deviate radially, from And ensureing that driving device concentricity is good, hinged cantilever component is laborsaving；Stop nut and sunpender axle thread in cantilever member connection After connection, then there is locking plate (110) to be connected to stop nut in sunpender axis spindle-end looseness-proof notch, stop nut being avoided to unclamp, Securely and reliably.

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 vertical view of Fig. 1；

Fig. 4 is F partial enlarged views (rotating mechanism) in Fig. 1；

Fig. 5 is the E direction views in Fig. 4；

Fig. 6 is underslung trolley structural front view in the application；

Fig. 7 is the side view of Fig. 6；

Fig. 8 is the G direction views (trolley driving mechanism) in Fig. 6；

Fig. 9 is car bumper device schematic diagram in the application；

Figure 10 is cart actuating device schematic diagram in the application.

Specific embodiment

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

As shown in Figure 1, Figure 2, Figure 3 shows, a kind of crane with lifting truck and underslung trolley and balance weight, including twin beams Crane span structure 28；The double girder bridge includes end carriage 1, girder 2；1 both ends of end carriage are designed with the cart driving of vehicle wheel rim pulley teeth Device 8 and safety hook 11；2 lower section of girder is equipped with i-beam track 21；It is connected to be promoted between two tracks 21 small Vehicle 01 and underslung trolley 3；The lifting truck 01 is equipped with hook type lifting lifting device；The underslung trolley 3 is equipped with rotation Rotation mechanism 4；42 lower end of sunpender axis in the rotating mechanism is connect with the Holder for hanging household utensiles in cantilever member 5, and upper end connection current collection is slided Ring 9；The cantilever member 5 includes cantilever beam 51, Holder for hanging household utensiles 52；The Holder for hanging household utensiles 52 is welded on the one of the cantilever beam 51 End；For the cantilever beam close to 52 one end hanging balancing weight 99 of Holder for hanging household utensiles, the other end is connected to electric block 10 and car bumper device 70, and position is adjustable, the electric block can be moved along outrigger horizontal, and the cantilever beam, which is under the girder, to be stretched Go out operation outside workshop, and random angle can rotate in the horizontal plane.

The eave tile of the safety hook 11 is connect with the lower surface gap of 12 upper cover plate Ji edge of cart support rail beam.

As shown in Figure 4, Figure 5, the rotating mechanism 4 include driving device 40, small elevating arc 402, big elevating arc 403, Bearing block 41, sunpender axis 42；The rotating mechanism 4 includes driving device 40, small elevating arc 402, big elevating arc 403, bearing Seat 41, sunpender axis 42；The sunpender axis is hollow shaft, and one end is equipped with screw thread, and threaded end opens up locking notch 421；It is described Sunpender axis is connected to by thrust bearing 45 inside the bearing block 41, and the sunpender axis reconnects bearing A44 and bearing B46, The bearing A and bearing B is connected to the both ends of above-mentioned bearing block by bolt and fixed cover 43 and blind flange 47 respectively, described Sunpender axis one end is stretched from the fixed cover center, and the other end is stretched from above-mentioned blind flange center；The bearing block 41 connects It is connected on trolley frame 31；The driving device 40 is composed of brake motor and horizontal speed-reducer, the driving device On trolley frame 31；The driving device output shaft is connected to small elevating arc 402, the small elevating arc and big elevating arc 403 external toothings connect, and the big elevating arc is connected on above-mentioned sunpender axis 42.

The cantilever member 5 is connected to by flat key 49 and stop nut 100 on the sunpender axis 42 of rotating mechanism；It is described Stop nut and sunpender shaft end head connected again by bolt and locking plate 110.

The bus ring 9 can purchase electromechanical accessory, including interior insulation circle, outer insulator, interior insulation circle with it is outer absolutely It can be rotated between edge body and can be mutually conductive；Interior insulation circle is connected on sunpender axis 42, and the cable of conducting ring leads on interior insulation circle That crosses inside sunpender axis 42 hollow is connected to electric block；Outer insulator is fixed by the bracket on trolley frame, on outer insulator Cable connect with external power cord.

As shown in Fig. 6, Fig. 7, Fig. 8, the underslung trolley 3 includes trolley frame 31, driving mechanism 34, roller devices 35； The trolley frame is welded by steel plate or is welded by steel plate and shaped steel combination；The trolley frame both sides connect two sets respectively The driving mechanism 34；The driving mechanism is connected to by balance plate 32 and axis pin 33 on trolley frame；Every on trolley frame The side for covering driving mechanism reconnects a roller devices 35；The roller devices are in immediately below track 21；The driving machine Structure 34 includes 341, two, the motor follower 343 of driving wheel 342, two, band gear, follower on driving wheel single-wheel edge and wheel rim Band single-wheel edge；Described two driving wheels are connected in left hanging plate 344, and described two followers are connected on right hanging plate 345；It is described Left hanging plate is connected with right hanging plate by two studs and nut 346；Above-mentioned motor 341 carries speed reducer, motor output shaft Band gear；The motor 341 is connected in left hanging plate, and motor output shaft is connect simultaneously with above-mentioned two driving wheel external toothing.

As shown in figure 9, the car bumper device 70 includes fixed seat 701, buffer 702, the fixed seat is welded by steel plate It is connected into square shape or is made by rectangular steel tube；The fixed seat side opens up clip slot 7011；Welding steel above the clip slot Plate 7012 opens up threaded hole 7013 on steel plate；Bolt and stop nut 703 are connected on threaded hole；Side is opened below the clip slot If connecting hole 7014；The fixed seat opens up buffer mounting hole 7015 on the side beside clip slot；Two buffers 702 are connected in two fixed seats 701；Two fixed seats are connected to rail by screw rod 704 and nut On two sides Ji 211 in road.

As shown in Figure 10, the cart actuating device 8, including wheel 81, axle 82, decelerating motor 83, the wheel For two-wheel edge, one side flange of wheel is provided with the gear teeth 811；The inside wheel both sides connect bearing 84 respectively, outside two bearings Circle baffle ring 85 is fixed on wheel；Two bearing inner races are connected on axle 82, described axle one end branch sleeve 86, The other end of the outer diameter of the sleeve and the axle is connected in the two side walls of end carriage 1, and is fixed with baffle 87；Institute It states decelerating motor 83 to be connected on the side wall of end carriage 1, the output shaft of the decelerating motor is connect with above-mentioned 811 external toothing of the gear teeth.

Claims (5)

1. a kind of crane with lifting truck and underslung trolley and balance weight, including double girder bridge (28)；The twin beams bridge Frame includes end carriage (1), girder (2)；It is characterized in that：End carriage (1) both ends are designed with the cart driving of vehicle wheel rim pulley teeth Device (8) and safety hook (11)；I-beam track (21) is equipped with below the girder (2)；Connect between two tracks (21) Then lifting truck (01) and underslung trolley (3)；The lifting truck (01) is equipped with hook type lifting lifting device；It is described outstanding It hangs trolley (3) and is equipped with rotating mechanism (4)；Sunpender axis (42) lower end in the rotating mechanism and hanging in cantilever member (5) Hanging seat connects, upper end connection bus ring (9)；The cantilever member (5) includes cantilever beam (51), Holder for hanging household utensiles (52)；It is described Holder for hanging household utensiles (52) is welded on one end of the cantilever beam (51)；The cantilever beam is close to Holder for hanging household utensiles (52) one end hanging balancing weight (99), the other end is connected to electric block (10) and car bumper device (70) and car bumper position is adjustable, and the electric block can be along Outrigger horizontal moves, and the cantilever beam is in operation outside extended workshop below the girder, and can be arbitrary in the horizontal plane Angle rotates.

2. a kind of crane with lifting truck and underslung trolley and balance weight according to claim 1, feature exist In：The rotating mechanism (4) including driving device (40), small elevating arc (402), big elevating arc (403), bearing block (41), Sunpender axis (42)；The sunpender axis is hollow shaft, and one end is equipped with screw thread, and threaded end opens up locking notch (421)；It is described to hang Bar axis is connected to the bearing block (41) inside by thrust bearing (45), and the sunpender axis reconnects bearing A (44) and bearing B (46), the bearing A and bearing B is connected to the two of above-mentioned bearing block by bolt and fixed cover (43) and blind flange (47) respectively End, described sunpender axis one end are stretched from the fixed cover center, and the other end is stretched from above-mentioned blind flange center；The axis Bearing (41) is connected on trolley frame (31)；The driving device (40) is composed of brake motor and horizontal speed-reducer, The driving device is mounted on trolley frame (31)；The driving device output shaft is connected to small elevating arc (402), described Small elevating arc is connect with big elevating arc (403) external toothing, and the big elevating arc is connected on above-mentioned sunpender axis (42).

3. a kind of crane with lifting truck and underslung trolley and balance weight according to claim 1, feature exist In：The underslung trolley (3) includes trolley frame (31), driving mechanism (34), roller devices (35)；The trolley frame is by steel plate It is welded or is welded by steel plate and shaped steel combination；The trolley frame both sides connect the driving mechanism described in two sets respectively (34)；The driving mechanism is connected to by balance plate (32) and axis pin (33) on trolley frame；In every set driving machine on trolley frame The side of structure reconnects a roller devices (35)；The roller devices are in immediately below track (21)；The driving mechanism (34) including motor (341), two driving wheels (342), two followers (343), band gear on driving wheel single-wheel edge and wheel rim, Follower band single-wheel edge；Described two driving wheels are connected in left hanging plate (344), and described two followers are connected to right hanging plate (345) on；The left hanging plate is connected with right hanging plate by two studs and nut (346)；Above-mentioned motor (341) is included to be subtracted Fast machine, motor output shaft band gear；The motor (341) is connected in left hanging plate, motor output shaft simultaneously with above-mentioned two master Driving wheel external toothing connects.

4. a kind of crane with lifting truck and underslung trolley and balance weight according to claim 1, feature exist In：The car bumper device (70) includes fixed seat (701), buffer (702), and the fixed seat is welded into square shape by steel plate Or it is made by rectangular steel tube；The fixed seat side opens up clip slot (7011)；Welding steel (7012) above the clip slot, Threaded hole (7013) is opened up on steel plate；Bolt and stop nut (703) are connected on threaded hole；Side opens up company below the clip slot Connect hole (7014)；The fixed seat opens up buffer mounting hole (7015) on the side beside clip slot；Two buffers (702) it is connected on two fixed seats (701)；Two fixed seats are connected respectively by screw rod (704) and nut It is connected on two sides Ji (211) of track.

5. a kind of crane with lifting truck and underslung trolley and balance weight according to claim 1, feature exist In：The cart actuating device (8), including wheel (81), axle (82), decelerating motor (83), the wheel is two-wheel edge, One side flange of wheel is provided with the gear teeth (811)；The inside wheel both sides connect bearing (84), two bearing outer ring gears respectively Circle (85) is fixed on wheel；Two bearing inner races are connected on axle (82), described axle one end branch sleeve (86), The other end of the outer diameter of the sleeve and the axle is connected in the two side walls of end carriage (1), and solid with baffle (87) It is fixed；The decelerating motor (83) is connected on the side wall of end carriage (1), the output shaft of the decelerating motor and the above-mentioned gear teeth (811) External toothing connects.