CN210162081U

CN210162081U - Throw and take telescopic material car

Info

Publication number: CN210162081U
Application number: CN201822248111.0U
Authority: CN
Inventors: 陶小虎; 姬文晨; 豆玉龙
Original assignee: CRCC High Tech Equipment Corp Ltd
Current assignee: CRCC High Tech Equipment Corp Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-03-20
Anticipated expiration: 2028-12-29

Abstract

A material trolley with a telescopic throwing belt comprises a trolley frame (13 '), a telescopic mechanism (2), a throwing belt (14'), a rotating mechanism (12 '), a storage and transportation box (15'), a lifting device (6), a steel wire rope (7) and a bogie (8), wherein the storage and transportation box (15 ') is directly arranged on the trolley frame (13'), the throwing belt (14 ') is assembled with the telescopic mechanism (2), the telescopic mechanism (2) is connected with the rotating mechanism (12') fixed on the trolley frame (13 '), the lifting device (6) is arranged at the top of the storage and transportation box (15'), the technical scheme relates to a material trolley with a telescopic throwing belt, when the material trolley is connected with other trains for hanging operation, the throwing belt of the vehicle can retract between the vehicle frame and the storage and transportation box, so that the problem of the overlapping of the throwing belt when the material vehicle runs is not considered, the flat car is successfully cancelled, and the running safety and stability of the whole vehicle are improved.

Description

Throw and take telescopic material car

Technical Field

The utility model relates to a material car for transporting and storing bulk material.

Background

The throwing belt of the present material vehicle widely used on the railway does not have the telescopic function. In a construction train set, a flat car is used as a material car of a head car to solve the problem of lapping and leaning of a throwing belt. When the train runs, if the responsibility of an operator is not strong, the safety problem is easy to occur if the operator does not check the locking of the lap and the abutment carefully.

The invention patent publication CN 106458227 a discloses a bulk material loading wagon for incorporation into a loading train, the loading train comprising a plurality of such wagons, the bulk material device wagon comprising: a bin for storing bulk material, the bin being open-topped and mounted to a truck frame, a bottom conveyor associated with the bin extending in a lower region of the bin and in a longitudinal direction of the truck. The truck frame is provided with an opening between two adjacent on-rail running gears, through which opening the lower part of the transfer conveyor adjoining the lower deflecting end is guided. A drive is provided for displacement of the transfer conveyor through the opening in the longitudinal direction and the conveying direction of the transfer conveyor and relative to the truck frame. The transfer conveyor of the truck may be retracted inside the truck frame. However, on the one hand, this patent does not describe the implementation of the extension and retraction of the transfer conveyor. On the other hand, the included angle between the transfer conveyor belt of the loading train and the horizontal direction does not change before and after expansion, and the space occupied by the transfer conveyor belt in the truck frame is larger, so that the design of the truck frame and the travelling mechanism is more difficult.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a throw material car that area can stretch out and draw back, this car need not to use the flatbed to take and lean on throwing the area when linking up with other trains and moving, has improved the security of whole car operation.

The utility model discloses the first aspect provides a throw and take telescopic material car, it includes frame, telescopic machanism, throws area, rotary mechanism, storage box, hoisting device, wire rope and bogie. The storage and transportation box is used for storing materials, the storage and transportation box is directly arranged on the frame, the throwing belt is arranged together with a telescopic mechanism, the telescopic mechanism is connected with a rotating mechanism arranged on the frame, and the rotating mechanism plays a supporting role for the throwing belt and realizes the rotating function of the throwing belt; the lifting device is arranged at the top of the storage and transportation box and is connected with the end part of the throwing belt through a steel wire rope, and the lifting device is used for lifting the throwing belt to a specified height.

Preferably, the telescopic mechanism is connected with the rotating mechanism and is fixed on the frame together. The driving element arranged on the telescopic mechanism provides driving force for the extension and retraction of the throwing belt.

Preferably, the throwing belt is placed in a space between the frame and the storage and transportation box after being retracted, the telescopic mechanism supports the throwing belt, and the rollers of the telescopic mechanism are always in contact with the rails on two sides of the throwing belt in the whole telescopic process.

Preferably, the throwing belt of the material vehicle is arranged on the telescopic mechanism, and when the material vehicle is in a non-working state, the function of withdrawing the throwing belt into the material vehicle can be realized. When the material vehicle is in a non-working state, the throwing belt is retracted between the vehicle frame and the storage and transportation box; when the material vehicle is in a working state, the throwing belt extends out under the driving action of the driving element and is lifted to a specified height. The utility model belongs to the railway engineering vehicle field.

More preferably, the telescopic mechanism comprises a sliding support, a rail, rollers, a driving shaft, a bearing seat assembly, a hydraulic motor, a pin gear and a pin rack, wherein the sliding support is connected with a rotating mechanism arranged on the frame, the rollers are symmetrically arranged on two transverse sides of the sliding support, the rollers are matched with the rail, and a throwing belt is arranged between the rails on the two sides; the driving shaft is arranged in the sliding support, two ends of the driving shaft are supported by the bearing seat assembly, and the hydraulic motor is arranged on the bearing seat assembly through the flange plate. The driving shaft is also provided with a pin gear, and the bottom of the throwing belt is connected with a pin rack. The power output by the hydraulic motor is transmitted to the throwing belt in a pin tooth transmission mode, and the throwing belt extends out and retracts on the sliding support under the guiding action of the roller and the track.

Preferably, the pin gears are arranged in left-right symmetry on both lateral sides of the drive shaft.

Preferably, the pin rack is fixedly connected to the bottom of the throwing belt through a fastener.

The sliding support is a structural main body of the whole telescopic mechanism and comprises a left sliding support, a right sliding support, a large rectangular pipe and a small rectangular pipe; the left side sliding support with the right side sliding support passes through big rectangular pipe and little rectangular pipe connection, big rectangular pipe with little rectangular pipe is located respectively the left side sliding support with the vertical the place ahead and the rear of right side sliding support, still are equipped with the gyro wheel mounting panel on sliding support's the left side sliding support and the right side sliding support, include the horizontal slot on this gyro wheel mounting panel to the axis of guaranteeing to be located all gyro wheels of rail homonymy is in the coplanar. The roller is mounted on the roller mounting plate and connected with the fixing plate through the wheel shaft, the fixing plate is provided with a threaded hole, the horizontal groove of the roller mounting plate on the sliding support is provided with a through hole, and the fixing plate is mounted and fixed on the roller mounting plate of the sliding support, so that the roller can be conveniently mounted and replaced after being damaged in use.

The roller is arranged on the sliding support, and plays a role in supporting the throwing belt and reducing the movement resistance of the throwing belt. The track is fixed with the throwing belt, the inner side profile of the cross section of the track and the outer side profile of the cross section of the roller are mutually contained, so that the track and the roller can work in a matched mode, the roller rolls on the inner side of the track, and the free movement of the throwing belt on the sliding support is achieved.

The two ends of the driving shaft are symmetrical in structure, and the two ends of the driving shaft are connected with the hydraulic motor in a spline mode. The two pin gears are symmetrically arranged at two ends of the driving shaft and synchronously transmit torque output by the hydraulic motor. The bearing seat assembly is arranged on the side plates of the right side sliding support and the left side sliding support on two sides of the sliding support and plays a role in supporting the driving shaft.

The pin rack comprises a clamping plate, a sleeve and a round pin; the clamping plates are provided with through holes according to the standard pitch size, the round pins are sleeved on the sleeves, and the two clamping plates are fixedly connected together through the sleeves. The pin rack is fixed at the bottom of the throwing belt through a fastener. The pin rack comprises several standard knots of equal length, typically less than 1 meter in length.

Preferably, the steps S1, S2, S3, S4, S5, S6, S7, S8, S9 are sequentially performed.

Preferably, the cross-section of the outer circumferential profile of the roller has a pitch of 1: 20, which taper slopes downwardly toward the center line of the tie.

Preferably, the bottom of the throwing belt is welded with a pin and rack mounting plate, through holes I are formed in the pin and rack mounting plate at fixed intervals, and a pin and rack is fixed on the pin and rack mounting plate through bolts, washers and nuts and is meshed with a pin gear arranged on the driving shaft.

The utility model discloses the second aspect the operation method of throwing taking telescopic material car adopts the utility model discloses the first aspect throwing take telescopic material car.

Throw and take telescopic material car's positive effect to have:

1. the technical scheme relates to a material vehicle with a telescopic throwing belt, wherein when the material vehicle is connected with other trains to run, the throwing belt of the material vehicle can retract between a vehicle frame and a storage and transportation box, so that the problem of the leaning of the throwing belt when the material vehicle runs is not considered, a flat car is successfully cancelled, and the running safety and stability of the whole vehicle are improved.

2. In the technical scheme, in the process of extending out and retracting the throwing belt into the material vehicle, the included angle between the throwing belt and the horizontal direction is very small, and the resistance required to be overcome by driving the throwing belt to move is reduced.

3. In the technical scheme, the throwing belt is retracted into the material trolley and then placed in the space between the trolley frame and the storage and transportation box, so that the problem of interference between the retracted throwing belt and the trolley frame is avoided, and the space in the material trolley is fully utilized.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of the material trolley with retractable throwing belt of the present invention;

FIG. 2 is a schematic view of the embodiment of FIG. 1 with the sling extended in place and the wire rope taut;

figure 3 is a schematic view of the embodiment of figure 1 with the sling retracted inside the hopper car;

FIG. 4 is a schematic view of a sling retraction mechanism of the embodiment shown in FIG. 3;

FIG. 5 is a schematic structural view of a sliding bracket in the sling retracting mechanism of the embodiment shown in FIG. 4;

FIG. 6 is a schematic structural diagram of a roller and a track in the belt-throwing telescopic mechanism of the embodiment shown in FIG. 4;

FIG. 7 is a schematic structural view of the pin and rack mounting of the embodiment shown in FIG. 4;

FIG. 8 is a schematic structural view of the pin rack of the embodiment shown in FIG. 4;

the numerical designations in fig. 1-8 mean:

2 telescopic mechanism 6 lifting device 7 steel wire rope 8 bogie

1 ' sliding support 2 ' rail 3 ' roller 4 ' drive shaft 5 ' bearing block assembly

6 ' hydraulic motor 7 ' pin gear 8 ' pin rack 9 ' mounting ring 10 ' set screw

11 ' flange plate 12 ' rotating mechanism 13 ' frame 14 ' throwing belt 15 '

101 'left side sliding bracket 102' right side sliding bracket 103 'big rectangular pipe 104' small rectangular pipe

105 'roller mounting plate 106' horizontal groove

301 'axle 302' fixing plate 303 'spring washer 304' screw

801 'pin rack mounting plate 802' bolt 803 'washer 804' nut

805 ' clamping plate 806 ' sleeve 807 ' round pin.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Embodiment 1.1, as shown in fig. 1, the material trolley with a telescopic throwing belt in this embodiment includes a frame 13 ', a telescopic mechanism 2, a throwing belt 14', a rotating mechanism 12 ', a storage and transportation box 15', a lifting device 6, a steel wire rope 7 and a bogie 8. A storage and transport container 15 'is mounted directly on the frame 12' for storing bulk material. The throwing belt 14 'is assembled with the telescopic mechanism 2, and the telescopic mechanism 2 is connected with the rotating mechanism 12' fixed on the frame 13 ', so as to support and realize the telescopic function of the throwing belt 14'. The throwing belt 14 'moves back and forth on the telescopic mechanism 2 under the driving action of a hydraulic motor 6' arranged on the telescopic mechanism 2. The lifting device 6 is arranged on the top of the storage and transportation box 15 ' and is connected with the end part of the throwing belt 14 ' through a steel wire rope 7 for lifting and leveling the throwing belt 14 ' to a designated position.

Fig. 2 is a schematic diagram of the state that the throwing belt stretches out in place and the steel wire rope is tightened. The throwing belt 14 'is combined with the telescopic mechanism 2, and in the whole telescopic process, the rollers 3' of the telescopic mechanism 2 are always in contact with the rails 2 'on two sides of the throwing belt 14'. Before the material vehicle starts to work, a hydraulic motor 6 ' arranged on the telescopic mechanism 2 drives a throwing belt 14 ' to extend out of the front of the train, after the throwing belt 14 ' extends in place, the hydraulic motor 6 ' stops acting, and a lifting device 6 lifts the throwing belt 14 ' to a specified height through a steel wire rope 7; after the material vehicle works, the lifting device 6 puts down the throwing belt 14 'to a designated position through the steel wire rope 7, and after the throwing belt 14' is put down to the designated position, the hydraulic motor 6 'drives the throwing belt 14' to retract between the storage and transportation box 15 'and the vehicle frame 13'.

The wire rope 7 connecting the throwing belt 14 'and the lifting device 6 is tightened only in the process of lifting or lowering the throwing belt 14', and is in a loose state in other periods.

Figure 3 is a schematic view of the inner part of the throwing belt retracting material trolley. The storage and transport container 15 ' is mounted on the frame 13 ' by means of legs at an angle to the frame 13 '. The throwing belt 14 ' is placed in a space between the frame 13 ' and the storage and transportation box 15 ' after retracting, the front end of the throwing belt 14 ' is not separated from the telescopic mechanism 2, and the telescopic mechanism 2 plays a role in supporting the throwing belt 14 '.

As shown in fig. 4, the throwing belt telescopic mechanism of the material vehicle comprises a sliding support 1 ', a rotating mechanism 12 ' is connected below the sliding support 1 ', the rotating mechanism 12 ' is installed on a vehicle frame 13 ', the sliding support 1 ' is a structural body of the throwing belt telescopic mechanism of the whole material vehicle, and a throwing belt 14 ' is arranged above the sliding support 1 ' and supports the throwing belt 14 '. The two sides of the sliding support 1 'are welded with mounting rings 9', the bearing seat assemblies 5 'are mounted on the two sides of the sliding support 1' through the mounting rings 9 'and the set screws 10', and the middle of the sliding support 1 'is connected through a driving shaft 4'. The roller wheels 3 ' are symmetrically arranged on the two transverse sides of the sliding support 1, the roller wheels 3 ' are matched with the rails 2 ', the roller wheels 3 ' roll in grooves of the rails 2 ', the rails 2 ' stretch and retract along the longitudinal direction under the rolling action of the roller wheels 3 ', the polishing belts 14 ' are welded between the rails 2 ' on the two sides, and the storage and transportation box 15 ' is further arranged on the frame 13 ' and used for storing materials.

As shown in fig. 5, the structure of the sliding bracket 1 ' is shown, the sliding bracket 1 ' is a main structure of the belt-throwing telescopic mechanism of the whole material vehicle, the sliding bracket 1 ' includes a left sliding bracket 101 ', a right sliding bracket 102 ', a large rectangular tube 103 ' and a small rectangular tube 104 ', the left sliding bracket 101 ' and the right sliding bracket 102 ' are longitudinally arranged on the vehicle frame 13 ' above both sides of the track, the large rectangular tube 103 ' and the small rectangular tube 104 ' are respectively arranged at the front and rear longitudinal ends between the left sliding bracket 101 ' and the right sliding bracket 102 ', the driving shaft 4 ' is arranged between the large rectangular tube 103 ' and the small rectangular tube 104, and the driving shaft 4 ' is transversely arranged between the left sliding bracket 101 ' and the right sliding bracket 102 ' and passes through the through holes of the left sliding bracket 101 ' and the right sliding bracket 102 '. The left sliding bracket 101 ' and the right sliding bracket 102 ' are both provided with a roller mounting plate 105 ', and the roller mounting plate 105 ' comprises three horizontal grooves 106 ' for mounting the rollers 3 ', so that the axes of all the rollers 3 ' on the same side are ensured to be in the same plane. The driving shaft 4 'and the pin gear 7' are embedded in the through holes of the left sliding bracket 101 'and the right sliding bracket 102', and the driving shaft 4 'is assembled with the sliding bracket 1' through the through holes after the driving shaft 4 'is assembled with the bearing block assembly 5'.

The driving shaft 4 ' is provided with a set of bearing seat assemblies 5 ' at two ends respectively, and the bearing seat assemblies play a role in supporting the driving shaft 4 '. The bearing seat assemblies 5 ' are arranged on two sides of the sliding support 1 ', the mounting ring 9 ' is welded on the outer side of the support and used for limiting the movement of the bearing seat assemblies 5 ' along the circumferential direction, the set screw 10 ' is arranged in a blind hole of the mounting ring 9 ' and used for limiting the movement of the bearing seat assemblies 5 ' along the axial direction, and the bearing seat assemblies 5 ' and the sliding support 1 ' cannot move relatively through the mounting ring 9 ' and the set screw 10 '. The hydraulic motor 6 'is assembled with the housing assembly 5' by means of a flange 11 'and the flange 11' is splined to the drive shaft 4 'to provide power for extension and retraction of the slinger 14'.

A pin rack 8 ' is installed at the bottom of the polishing belt 14 ', and the pin rack 8 ' is engaged with a pin gear 7 ' installed on the driving shaft 4 '. The power output by the hydraulic motor 6 'is transmitted to the throwing belt 14' in a pin-tooth transmission mode, and the throwing belt 14 'can extend and retract on the sliding bracket 1' under the guiding action of the roller 3 'and the rail 2'.

Fig. 6 is a schematic structural view of the roller 3 ' and the rail 2 ', which serve to guide and reduce the movement resistance to the extension and retraction of the slinger 14 '. The cross section of the excircle profile of the roller 3' has a slope of 1: 20, which taper slopes downwardly toward the center line of the tie. The roller 3 ' is connected with the fixing plate 302 ' through the axle 301 ', and the end of the axle 301 ' is arranged in the round hole of the fixing plate 302 '. The fixing plate 302 'is provided with threaded holes, the horizontal grooves of the side plates of the left sliding bracket 101' and the right sliding bracket 102 'of the sliding bracket 1' are provided with through holes, the fixing plate 302 'is fixedly arranged on the side plates of the left sliding bracket 101' and the right sliding bracket 102 'of the sliding bracket 1' through bolts 304 'and spring washers 303', and the bolts 304 'pass through the threaded holes on the fixing plate 302' and the through holes on the side plates to connect the fixing plate 302 'and the side plates together, so as to facilitate the installation and the replacement after the roller 3' is damaged. The left rail 2 ' and the right rail 2 ' are respectively welded on two sides of the polishing belt 14 ', and the inner side profile of the rail 2 ' is matched with the conical surface of the roller 3 ', so that the polishing belt 14 ' can obtain a good centering effect when being stretched on the sliding support 1 '.

As shown in fig. 7, a pin and rack mounting plate 801 'is welded to the bottom of the polishing belt 14', through holes I are formed in the pin and rack mounting plate 801 'at fixed intervals, and a pin and rack 8' is fixed to the pin and rack mounting plate 801 'by a bolt 802', a washer 803 'and a nut 804' and is engaged with a pin gear 7 'mounted on the driving shaft 4'. The pin rack 8 'is rigidly connected with the throwing belt 14', so that the power output by the hydraulic motor 6 'can be well transmitted to the throwing belt 14' through the transmission of the pin gear 7 'and the pin rack 8', and the throwing belt 14 'is driven to extend and retract on the sliding bracket 1'.

Fig. 8 is a schematic structural diagram of a pin and rack 8 ' in an embodiment of the present invention, where the pin and rack 8 ' includes a clamping plate 805 ', a pin barrel 806 ', and a round pin 807 ', the two clamping plates 805 ' are connected by the pin barrel 806 ', and the round pin 807 ' is installed outside the pin barrel 806 ', and the round pin 807 ' plays a role in engaging with the pin gear 7 ' and reducing friction force.

The pin gear transmission is in a meshing mode that a pin rack 8 ' is in linear meshing with a pin gear 7 ', and the tooth profile curve of the pin gear 7 ' is an involute curve.

In order to reduce the accumulated machining error and facilitate installation, the pin rack 8' is composed of a plurality of standard knots with equal length, and the length of each standard knot is usually less than 1 meter.

Preferably, the cross section of the outer circular profile of the roller 3' has a pitch of 1: 20, which taper slopes downwardly toward the center line of the tie.

Preferably, a pin and rack mounting plate 801 'is welded to the bottom of the polishing belt 14', through holes I are formed in the pin and rack mounting plate 801 'at a fixed interval, and a pin and rack 8' is fixed to the pin and rack mounting plate 801 'by a bolt 802', a washer 803 'and a nut 804' and is engaged with a pin gear 7 'mounted on the driving shaft 4'.

The material vehicle with the telescopic throwing belt in the embodiment can achieve the function of withdrawing the throwing belt 14' into the material vehicle, so that when the material vehicle runs, a flat car is not needed to be used for leaning on the throwing belt, the application of the flat car is successfully cancelled, and the running safety of a train is improved.

In this embodiment, the throwing belt 14 ' is retracted into the interior of the material vehicle and then placed in the space between the vehicle frame 13 ' and the storage and transportation box 15 ', so that the problem of interference between the retracted throwing belt 14 ' and the vehicle frame 13 ' is avoided, and the space in the interior of the material vehicle is fully utilized.

In the technical scheme, in the process of extending out and retracting the material vehicle, the included angle between the throwing belt 14 'and the horizontal direction is small, so that the resistance required to be overcome for driving the throwing belt to move is reduced, and the performance requirement on the hydraulic motor 6' is lowered.

Claims

1. The utility model provides a throw and take telescopic material car which includes frame (13 '), telescopic machanism (2), throws area (14'), rotary mechanism (12 '), storage box (15'), hoisting device (6), wire rope (7) and bogie (8), and storage box (15 ') direct mount is on frame (13'), its characterized in that: the throwing belt (14 ') is assembled with a telescopic mechanism (2), the telescopic mechanism (2) is connected with a rotating mechanism (12') fixed on a vehicle frame (13 '), a lifting device (6) is arranged at the top of a storage and transportation box (15') and is connected with the end part of the throwing belt (14 ') through a steel wire rope (7), and the throwing belt (14') is combined with the telescopic mechanism (2), which is characterized in that: the throwing belt (14 ') is placed in a space between the frame (13 ') and the storage and transportation box (15 ') after being retracted, the front end of the throwing belt (14 ') is not separated from the telescopic mechanism (2), and the telescopic mechanism (2) plays a role in supporting the throwing belt (14 ').

2. The retractable throw belt material trolley of claim 1, further comprising: the telescopic mechanism (2) comprises a sliding support (1 '), a rotating mechanism (12') is connected below the sliding support (1 '), the rotating mechanism (12') is installed on a vehicle frame (13 '), a throwing belt (14') is arranged above the sliding support (1 '), the middle of the sliding support (1') is connected through a driving shaft (4 '), rollers (3') are symmetrically installed on two transverse sides of the sliding support (1 '), the rollers (3') are matched with rails (2 '), the rollers (3') roll in grooves of the rails (2 '), the rails (2') stretch and retract longitudinally under the rolling action of the rollers (3 '), the throwing belts (14') are welded between the rails (2 ') on two sides, the sliding support (1') comprises a left sliding support (101 '), a right sliding support (102'), a large rectangular pipe (103 ') and a small rectangular pipe (104'), the left sliding support (101 ') and the right sliding support (102 ') are longitudinally arranged on the vehicle frame (13 ') above two sides of the track, the large rectangular pipe (103 ') and the small rectangular pipe (104 ') are respectively positioned at the front end and the rear end of the longitudinal direction between the left sliding support (101 ') and the right sliding support (102 '), the driving shaft (4 ') is transversely arranged between the left sliding support (101 ') and the right sliding support (102 ') and penetrates through holes of the left sliding support (101 ') and the right sliding support (102 '), the left sliding support (101 ') and the right sliding support (102 ') are both provided with roller mounting plates (105 '), the roller mounting plate (105 ') comprises a horizontal groove (106'), and a driving shaft (4 ') and a pin gear (7') are embedded in through holes of the left sliding bracket (101 ') and the right sliding bracket (102').

3. The retractable throw belt material trolley of claim 1 or 2, wherein: the two ends of the driving shaft (4 ') are respectively provided with a set of bearing seat assembly (5'), the bearing seat assemblies (5 ') are arranged on the two sides of the sliding support (1'), the outer side of the sliding support (1 ') is connected with a mounting ring (9'), the hydraulic motor (6 ') is assembled with the bearing seat assemblies (5') through a flange plate (11 '), and the flange plate (11') is connected with the driving shaft (4 ') in a spline mode to provide power for the extension and retraction of the throwing belt (14').

4. The retractable throw belt material trolley of claim 1, further comprising: the pin rack (8 ') is arranged at the bottom of the throwing belt (14 '), the pin rack (8 ') is meshed with a pin gear (7 ') arranged on the driving shaft (4 '), the power output by the hydraulic motor (6 ') is transmitted to the throwing belt (14 ') in a pin gear transmission mode, and the throwing belt (14 ') can extend and retract on the sliding bracket (1 ') under the guiding action of the roller (3 ') and the track (2 ').

5. The retractable throw belt material trolley of claim 2, further comprising: the cross section of the excircle profile of the roller (3') has the inclination of 1: 20, which taper slopes downwardly toward the center line of the tie.

6. The retractable throw belt material trolley of claim 2 or 5, wherein: the roller (3 ') is connected with the fixing plate (302 ') through the wheel shaft (301 '), the end of the wheel shaft (301 ') is arranged in a round hole of the fixing plate (302 '), a threaded hole is formed in the fixing plate (302 '), through holes are formed in horizontal grooves of side plates of the left sliding bracket (101 ') and the right sliding bracket (102 ') of the sliding bracket (1 '), the fixing plate (302 ') is fixedly arranged on the side plates of the left sliding bracket (101 ') and the right sliding bracket (102 ') of the sliding bracket (1 ') through bolts (304 ') and spring washers (303 '), the bolts (304 ') pass through the threaded holes in the fixing plate (302 ') and penetrate through the through holes in the side plates to connect the fixing plate (302 ') and the side plates together, and the installation and the replacement after damage of the roller (3 ') are convenient.

7. A retractable throw belt hopper car as claimed in claim 1, 2, 4 or 5 wherein: the bottom of the throwing belt (14 ') is welded with a pin and rack mounting plate (801 '), and through holes I are formed in the pin and rack mounting plate (801 ') at fixed intervals.