阅读说明：本技术 车-带一体式连接换向的轨道输送机 (Rail conveyor with integrated connection and reversing ) 是由 张耀成 张宇雄 赵慧剑 李扬 李祥雷 于 2020-04-21 设计创作，主要内容包括：本发明属于散料运输技术领域,公开了一种车-带一体式连接换向的轨道输送机,采用轮轨系统进行物料输送,包括：承载机架,用于布设安装承载轨道、传动装置和轮式功能元件；承载轨道,承载运行轮式功能元件；传动装置,牵引驱动轮式功能元件沿承载轨道运行；轮式功能元件,等间距布置安装于承载轨道上用于固定输送带；若干轮式功能元件分段牵引输送带；输送带运行至输送机机头和机尾时不与轮式功能元件分离,轮式功能元件与输送带整体换向运行,完成物料运输。通过换向支架完成换向,取消了轨道小车与输送带的分离/结合装置。且输送带随轨道小车一同运转,由于轨道小车间隔分布,实现了分段牵引,输送带张力差小。(The invention belongs to the technical field of bulk cargo transportation, and discloses a vehicle-belt integrated connection reversing track conveyor, which adopts a wheel-rail system to convey materials and comprises the following components: the bearing frame is used for arranging and installing a bearing track, a transmission device and a wheel type functional element; the bearing track bears the running wheel type functional element; the transmission device is used for dragging the driving wheel type functional element to run along the bearing track; the wheel type functional elements are arranged on the bearing track at equal intervals and used for fixing the conveying belt; the plurality of wheel type functional elements are used for dragging the conveying belt in a subsection manner; the conveyer belt is not separated from the wheel type functional element when running to the head and the tail of the conveyer, and the wheel type functional element and the conveyer belt are wholly operated in a reversing way to finish material transportation. The reversing is completed by the reversing bracket, and a separation/combination device of the rail trolley and the conveying belt is eliminated. And the conveyer belt runs along with the small rail cars, and the small rail cars are distributed at intervals, so that the sectional traction is realized, and the tension difference of the conveyer belt is small.)

1. A rail conveyor with integrated vehicle-belt connection and reversing, which adopts a wheel-rail system for material conveying, comprises:

the bearing frame is used for arranging and installing a bearing track, a transmission device and a wheel type functional element;

the bearing track bears the running wheel type functional element;

the transmission device is used for dragging the driving wheel type functional element to run along the bearing track;

the wheel type functional elements are arranged on the bearing track at equal intervals and used for fixing the conveying belt;

the device is characterized in that a plurality of wheel type functional elements draw the conveyer belt in sections; the conveyer belt is not separated from the wheel type functional element when running to the head and the tail of the conveyer, and the wheel type functional element and the conveyer belt are wholly operated in a reversing way to finish material transportation.

2. The vehicle-belt integrated connection reversing track conveyor according to claim 1, wherein the arc-shaped limiting tracks are formed at the head and the tail of the conveyor through the bearing tracks and the bearing frame, and the conveying belt is integrated with the wheel-type functional elements to realize reversing through the arc-shaped limiting tracks.

3. The vehicle-belt integrated connection reversing track conveyor according to claim 2, wherein the bearing frame comprises a head reversing support, a middle track support and a tail reversing support, the head reversing support and the tail reversing support are identical in structure, the reversing support comprises a support and two sets of track plates mounted on the support, the track plates are annular semicircular plates coaxial with the head/the tail, the two sets of track plates are arranged in parallel, and the inner cambered surfaces of the two sets of annular track plates are limiting track surfaces when the wheel type functional elements are reversed.

4. The vehicle-belt integrated connection and reversing track conveyor according to claim 3, wherein the outer arc surfaces of the two sets of track plates of the head/tail reversing support are correspondingly and symmetrically provided with U-shaped surfaces, and the U-shaped surfaces on the two sets of track plates form radial limiting surfaces for preventing derailment of the wheel type functional elements; the track surfaces of the two groups of track plates of the machine head/machine tail reversing support are provided with bosses for preventing the wheel type functional element from axially moving.

5. The vehicle-belt integrated connection and reversing track conveyor according to claim 4, wherein the bearing track is a closed annular track formed by smooth transition of an ascending track, a machine head arc limiting track, a descending track and a machine tail arc limiting track, the ascending track and the descending track are parallel to each other, a middle section of the ascending track and the descending track are supported and fixed on a middle track support, and the machine head arc limiting track and the machine tail arc limiting track are correspondingly supported and fixed on a machine head reversing support and a machine tail reversing support; the outer contour cambered surface of the machine head/machine tail arc-shaped limiting track and the track surface of the corresponding machine head/machine tail reversing support track plate are parallel to form a running limiting track when the wheel type functional element is reversed.

6. The vehicle-belt integrated connection reversing track conveyor according to claim 5, wherein the wheel type functional element is a four-axle four-wheel constant-axle-distance track trolley which comprises a trolley frame, a trolley body and four wheels, the four wheels are symmetrically arranged through an axle and connected with the trolley frame, an upper connecting plate and a lower connecting plate which are movably connected through bolts and used for guiding a limiting transmission device are arranged in the middle of the lower bottom surface of the trolley frame, the trolley body is mounted above the trolley frame, the trolley body is in a dumbbell shape, and the top of the trolley body is connected with a U-shaped frame used for fixing a conveying belt through bolts.

7. The vehicle-belt integrated connection reversing track conveyor according to claim 6, wherein the buffer devices for absorbing the impact force of materials on the track trolley are symmetrically arranged between the vehicle body and the vehicle frame in the left-right direction, the buffer devices are leaf spring sets connected through U-shaped bolts, two ends of each leaf spring set are provided with rolling lugs, and the rolling lugs are correspondingly connected with a leaf spring front support and a leaf spring rear support at the ends of the vehicle frame through lifting lugs.

8. The vehicle-belt integrated connection reversing track conveyor according to claim 7, wherein the transmission device comprises a round-link chain sprocket and a round-link chain, the round-link chain sprocket is provided with cylindrical rollers with diameters slightly larger than the diameter of the sprocket but slightly lower than the frame of the small rail car on two sides of the universal round-link chain sprocket, and the cylindrical rollers and the sprocket rotate coaxially.

9. The vehicle-belt integrated connection reversing track conveyor according to claim 8, wherein the ascending track is a curved track with a bending angle within 15 degrees, a limiting track for preventing the rail car from deviating from the track is additionally arranged right above the curved track, the bending angles of the limiting track and the curved track are the same, and the height between the limiting track and the curved track is slightly larger than the height of wheels of the rail car.

10. The vehicle-belt integrated connection reversing track conveyor according to claim 9, wherein the wheels of the small rail car are internally provided with needle bearings without inner rings, and when the wheels pass through a bent track, the wheels are stressed to enable the needle bearings without inner rings to move in an axial direction in a small amplitude.

Technical Field

The invention relates to a track conveyor with integrated vehicle-belt connection and reversing, in particular to a novel track type belt conveyor which is used for quickly and inexpensively transporting materials in industrial transportation occasions and belongs to the technical field of bulk material transportation.

Background

The belt conveyor, the most common conveying equipment in the industry, has experienced a hundred years of development history, and is widely used due to its strong continuous conveying capacity, long distance of the conveyor, simple structure, easy maintenance and low conveying cost. With continuous progress of the industrial level, belt conveyors are developing towards the trends of long conveying distance, large conveying capacity, high power and high strength, the track type conveyors which are researched and applied at present relieve the problems of overlarge tension of the conveying belt and overlarge running resistance of the whole machine in the running process of the general belt conveyors, but the track type conveyors have the problems of complicated structure, large occupied area and the like of a machine head or a machine tail reversing device, the problems restrict the use of the track type conveyors in some occasions, and the problems are more and more emphasized.

Disclosure of Invention

The invention aims to solve the reversing problem of a rail conveyor at the head/tail of the rail conveyor, and further provides a rail conveyor with integrated vehicle-belt connection reversing.

The invention adopts the following technical scheme:

a rail conveyor with integrated vehicle-belt connection and reversing, which adopts a wheel-rail system for material conveying, comprises:

the bearing frame is used for arranging and installing a bearing track, a transmission device and a wheel type functional element;

the bearing track bears the running wheel type functional element;

the transmission device is used for dragging the driving wheel type functional element to run along the bearing track;

the wheel type functional elements are arranged on the bearing track at equal intervals and used for fixing the conveying belt;

the plurality of wheel type functional elements are used for dragging the conveying belt in a subsection manner;

the conveyer belt is not separated from the wheel type functional element when running to the head and the tail of the conveyer, and the wheel type functional element and the conveyer belt are wholly operated in a reversing way to finish material transportation.

The machine head and the machine tail of the conveyor form an arc-shaped limiting track through a bearing track and a bearing rack, and the conveyor belt is integrated with wheel-type functional elements to realize reversing through the arc-shaped limiting track.

The bearing frame comprises a machine head reversing support, a middle rail support and a machine tail reversing support, the machine head reversing support and the machine tail reversing support are identical in structure, the reversing support comprises a supporting support and two sets of rail plates which are arranged on the supporting support, the rail plates are annular semi-circular plates coaxial with the machine head and the machine tail, the two sets of rail plates are arranged in parallel, and inner arc surfaces of the two sets of annular rail plates are limiting rail surfaces when the wheel type functional elements are reversed.

The outer cambered surfaces of two groups of track plates of the machine head/machine tail reversing support are correspondingly and symmetrically provided with U-shaped surfaces, the U-shaped surfaces on the two groups of track plates form a radial limiting surface for preventing the derailment of the wheel type functional element, the U-shaped surfaces are matched with the shape (U-shaped) of a conveying belt fixed on a vehicle body, and when the track trolley is reversed, the shape of the conveying belt can be kept consistent when the conveying belt passes through the U-shaped surfaces of the reversing support, so that the conveying belt can conveniently pass through the U-; the track surfaces of the two groups of track plates of the machine head/machine tail reversing support are provided with bosses for preventing the wheel type functional element from axially moving.

The bearing track is a closed annular track formed by smooth transition of an ascending track, a machine head arc-shaped limiting track, a descending track and a machine tail arc-shaped limiting track, the ascending track and the descending track are parallel to each other, the middle sections of the ascending track and the descending track are supported and fixed on a middle track support, and the machine head arc-shaped limiting track and the machine tail arc-shaped limiting track are correspondingly supported and fixed on a machine head reversing support and a machine tail reversing support; the outer contour cambered surface of the machine head/machine tail arc-shaped limiting track and the inner cambered surface of the corresponding machine head/machine tail reversing support track plate are parallel to form a running limiting track when the wheel type functional element is reversed. The track is a common mining track, the specific structure of the track surface is a general conventional technology, and the tread of the wheel of the small rail car is a conical surface which is matched with the track surface so as to improve the capability of the small rail car to pass through a curve.

The wheel type functional element is a four-axis four-wheel constant-axle-distance rail trolley and comprises a frame, a trolley body and four wheels, wherein the four wheels are symmetrically arranged through axles and connected with the frame, the middle part of the lower bottom surface of the frame is provided with an upper plate and a lower plate which are movably connected through bolts and used for guiding a limiting transmission device (a round-link chain), the trolley body is arranged above the frame and is in a dumbbell shape, and the top of the trolley body is connected with a U-shaped frame used for fixing a conveying belt through bolts.

Bilateral symmetry is equipped with the buffer who is used for absorbing the impact force of material to small rail car between automobile body and the frame, and buffer is through U type bolted connection's leaf spring group, and the both ends of leaf spring group are equipped with the eye, and the eye corresponds with leaf spring fore-stock, the leaf spring after-poppet of frame end through the lug and is connected.

The transmission device comprises a round-link chain sprocket and a round-link chain, the round-link chain sprocket is additionally provided with cylindrical rollers with the diameters slightly larger than the diameters of the sprockets and slightly lower than the frame of the rail trolley on two sides of the universal round-link chain sprocket, and the cylindrical rollers and the sprockets rotate coaxially.

The ascending rail is a bent rail with a bending angle within 15 degrees, a limiting rail for preventing the rail trolley from deviating from the rail is additionally arranged right above the bent rail, the bending angles of the limiting rail and the bent rail are the same, and the height between the limiting rail and the bent rail is slightly larger than the height of wheels of the rail trolley.

The inner ring-free needle roller bearing is arranged in the wheel of the small rail car, and when the wheel passes through a bent rail, the wheel is stressed to enable the inner ring-free needle roller bearing to move in a small range in the axial direction.

The wheels of the rail trolley are made of resin composite materials.

The working principle of the invention is as follows: when the rail conveyor with integrated connection and reversing of the vehicle and the belt is used for conveying materials, a chain path and a plurality of rail trolleys form a closed ring under the meshing action of a machine head driving circular-ring chain sprocket, a machine tail driven circular-ring chain sprocket and a circular-ring chain, the chain moves along a bearing track (an ascending track, a machine head reversing support inner side track, a descending track, a machine tail reversing support inner side track and an ascending track), a conveying belt is fixed on a rail trolley body through a U-shaped frame, the driving circular-ring chain sprocket drives the rail trolleys and further drives the conveying belt to operate, the materials are in a continuous conveying state in the process, the rail trolleys and the conveying belt pass through a reversing support with a special structure at the machine head or the machine tail part, the integral operation of the rail trolleys and the conveying belt is realized, and the.

Compared with the prior belt conveyor, the invention has the obvious advantages that:

(1) the rail trolleys which are arranged at equal intervals are connected on the conveyor rail by chains; the chain drives the wheels of the small rail car to roll along the rail, and the rotation resistance and the rolling friction resistance of the wheels are smaller. The conveying system is more energy-saving and consumption-reducing, reduces the comprehensive operation cost and meets the requirement of green development.

(2) The conveyer belt runs together with the belt-connected conveyer under the action of the traction force of the rail trolleys, and the rail trolleys are distributed at intervals, so that the segmental traction is realized, and the tension difference of the conveyer belt is small. The low-strength conveying belt can be selected, and the economic cost of the conveying belt is greatly reduced.

(3) The conveying belt is fixed on the small rail car through the U-shaped frame, so that the friction action between the conveying belt and a car body supporting part of the small rail car is eliminated, the conveying belt and the small rail car are connected into a whole, the slipping of the conveying belt and the small car is eliminated, and the performance of the conveyor is further improved.

(4) The track type conveyor in the prior art needs to complete the separation or combination of the small rail car and the conveying belt at the head part or the tail part of the conveyor, and when the head part or the tail part of the vehicle-belt connection type conveyor is reversed, the small rail car and the conveying belt integrally run, the reversing is smoothly completed through the reversing support with a special structure, a separation device and a combination device of the small rail car and the conveying belt are eliminated, the structure of the conveyor is simplified, and the occupied area of the conveyor is reduced.

(5) The customized leaf springs are added to the two sides of the frame of the rail trolley, the conveyer is added with materials and runs, the impact force of the materials on the rail trolley can be absorbed by the leaf springs, the leaf springs play a role in buffering, and damage to the rail trolley is reduced.

(6) The rail trolley wheels are made of resin composite materials, the wheels can not generate sparks when running on the rails, the quiet and stable running process is guaranteed, the running quality of the wheels is reduced by adopting novel materials, the light weight of the rail trolley is realized, and the service life is prolonged.

(7) This conveyer adopts the wheel rail system to carry out the material and carries, and the wheel rail system is because orbital guide effect, has better performance when passing through crooked circuit.

Drawings

FIG. 1 is a schematic view of a main body of a track conveyor with integrated lane-belt interface;

FIG. 2 is a schematic view of a track conveyor with integrated belt-car interface;

FIG. 3a is a schematic perspective view of a reversing bracket;

FIG. 3b is a front view of the reversing bracket;

FIG. 3c is a side view of the reversing bracket;

FIG. 4 is a schematic view of a conveyor round-link chain sprocket;

FIG. 5 is a schematic view of a conveyor rail car owner;

FIG. 6 is a schematic view of a conveyor rail car;

FIG. 7 is a schematic view of a curved track of the conveyor;

wherein, the figures denote: 1-conveying belt, 2-round-link chain, 3-rail trolley, 4-reversing support, 5-ascending rail, 6-rail support, 7-round-link chain sprocket, 8-head/tail arc limiting rail, 9-descending rail, 10-U-shaped frame bolt, 11-U-shaped frame, 12-vehicle body, 13-wheel, 14-vehicle frame, 15-round-link chain connecting upper plate, 16-round-link chain connecting lower plate, 17-leaf spring front support, 18-lifting lug, 19-leaf spring, 20-winding lug, 21-spring clamp, 22-U-shaped bolt, 23-leaf spring rear support, 24-limiting rail, 25-bending rail and 26-bending rail support;

41-track plate, 42-support bracket, 43-extrados surface, 44-track surface, 45-U profile surface and 46-lug boss.

Detailed Description

The embodiments of the invention will be further explained with reference to the accompanying drawings:

the rail conveyor as shown in fig. 1 and 2 comprises four parts, namely a bearing frame, a bearing rail, a transmission device and a wheel type functional element.

The bearing frame consists of a nose reversing bracket, a tail reversing bracket and a track bracket (6). The bearing rail, the transmission device and the corresponding functional elements are arranged on the frame. The bearing track consists of an ascending track (5), a descending track (9), a machine head arc limiting track, a machine tail arc limiting track, a machine head reversing support inner side limiting track and a machine tail reversing support inner side limiting track, wherein the arc limiting track is matched with the ascending track (5) and the descending track (9), so that wheels of the rail trolley (3) can be stably converted between the ascending track (5) and the descending track (9). The transmission device consists of a round-link chain sprocket wheel (7) and a round-link chain (2). The functional element mainly comprises a rail trolley (3). During installation, the fixed bearing frame is provided with the transmission device and the functional elements, a certain ascending track (5) with a gauge is arranged above the track support (6), a descending track (9) is arranged vertically downwards, a machine head arc limiting track and a machine tail arc limiting track are respectively arranged on two sides of the ascending track (5), and a machine head reversing support inner side limiting track and a machine tail reversing support inner side limiting track are respectively arranged on two sides of the descending track.

When the round-link chain sprocket (7) is driven to rotate, the traction mechanism pulls the round-link chain (2) and the small rail car (3) which are connected to each other to run along the fixed track, so as to drive the conveying belt (1) fixed on the small rail car (3) to synchronously advance, and the conveying of materials is completed.

As shown in fig. 2, a head driving round-link chain sprocket and a tail driven round-link chain sprocket (7) are arranged between the two rails. The chain path of the round-link chain (2) is also provided with a plurality of uniformly distributed small rail cars (3) which are arranged into a closed ring shape (shown in figure 1) along the space between two chain wheels, and the machine head drives the round-link chain wheel (7) to drive the small rail car (3) to run on a bearing track along the chain path, so that the material conveying is completed circularly.

Further, as shown in fig. 3, the machine head/tail reversing bracket (4) is of a special structure, as shown in fig. 2, the conveyor belt (1) is fixed on the rail trolley (3) through the U-shaped frame (10), and the rail trolley (3) and the conveyor belt (1) integrally bypass the machine head reversing bracket and the machine tail reversing bracket to form a closed conveying ring. As shown in fig. 6, when the small rail car (3) passes through the reversing bracket (4), the car body (12) cannot interfere with the reversing bracket (4), especially the car body with the upper bearing car body and the lower connecting steel plate spring (19) cannot interfere with the reversing bracket (4), and the distance between two sets of track plates of the reversing bracket (4) and the radian of the U-shaped surface of the track plate can be reasonably designed by measuring the distance between the support plates at the two sides of the upper bearing car body and the included angle of the support plates; the distance between the bosses of the two groups of track slab track surfaces of the reversing bracket (4) is reasonably designed by measuring the distance between the steel plate springs (19) on the two sides of the lower part, so that the reversing process is smoothly finished.

Further, as shown in fig. 4, the circular chain sprocket (7) of aircraft nose, tail are special structure, circular chain sprocket (7) have added the diameter slightly to be greater than circular chain sprocket (7) diameter but slightly be less than the cylinder roller of small rail car frame (14) in general circular chain sprocket both sides, notice that small rail car (3) can not take place to interfere with circular chain sprocket (7) when passing through circular chain sprocket (7), add cylinder roller for making conveyer belt (1) when through switching-over support (4), circular chain sprocket (7) drive coaxial cylinder roller, and then can drive conveyer belt (1) bottom and can accomplish the switching-over smoothly.

Further, the specific structure of the rail trolley (3) is shown in fig. 5 and 6 and is in a four-wheel + frame + vehicle body form, the structure adopts a four-shaft four-wheel constant-wheelbase trolley, a needle roller bearing without an inner ring is arranged in the wheel (13), the inner side of the wheel (13) is provided with a flange, an axle is connected to the frame (14), when the wheel (13) passes through the curved track (25), the wheel (13) is stressed to enable the needle roller bearing without the inner ring to move in a small amplitude in the axial direction, and the wheel has better performance to pass through the curved track; the dumbbell-shaped conveying belt is characterized in that the vehicle body (12) is dumbbell-shaped, so that the conveying belt (1) can be placed to convey materials conveniently, a round-link chain upper plate (15) and a round-link chain lower connecting plate (16) are connected to the lower portion of the vehicle frame (14) in the middle to fix the limiting round-link chain (2), a steel plate spring (19) is mounted on the vehicle frame (14) through a U-shaped bolt and connected to the vehicle body (12), the vehicle body (12) is connected with the U-shaped frame through a U-shaped frame bolt to achieve the purpose of fixing the conveying belt, and the fixing pieces are; the distance between the small rail car wheel sets is matched with the track gauge, and the small rail car wheel sets roll on the double tracks; two adjacent rail trolleys are connected together through a circular ring chain (2). The specific length of the round-link chain (2) is determined by the length of the car body (12), the structure can ensure that the chain does not interfere with the conveying belt, and when the chain passes through the chain wheel of the circular-link chain at the head and the chain wheel (7) at the tail, the small rail car (3) passes through the chain links of the circular-link chain.

Furthermore, as shown in fig. 6, two sides above the frame (14) are connected with a leaf spring (19) through a U-shaped bolt (22), and a lug (20) on the leaf spring is respectively connected with an upper leaf spring front bracket (17) and an upper leaf spring rear bracket (23) of the vehicle body (12) through a lifting lug (18). Add leaf spring (19) on small rail car (3), the conveyer is adding material and operation in-process, and the impact force of material to small rail car (3) can be absorbed by leaf spring (19), and leaf spring (19) have played the effect of buffering, have reduced the harm to small rail car (3).

Further, as shown in fig. 7, a curved track (25) is arranged on a curved track support (26) of the conveyor, the wheel track system has better performance when passing through a curved line, the small rail car (3) can well pass through the curved track (25) with a small-amplitude curved oblique angle, and a curved track limiting track (24) is also arranged above the curved track (25), so that the purpose of avoiding the deviation/separation of the small rail car (3) from the track when passing through the curved track (25) is realized.

The track conveyor is a belt conveyor which reduces the tension of a conveying belt by integrally reversing the integral operation of a plurality of track trolleys and the conveying belt, and the belt conveyor has particularly outstanding advantages under the conditions of reducing the operation resistance and reducing the occupied area of the conveyor.

The conveyer belt no longer uses as the solitary part of conveyer, uses U type frame to fix the conveyer belt on the small rail car through U type frame bolt, has cancelled the friction of conveyer belt and small rail car automobile body supporting component, makes conveyer belt and small rail car link as an organic whole, has eliminated conveyer belt and small rail car and has skidded, has further improved the performance of conveyer.

When the rail trolley passes through the ascending rail to the machine head reversing support, wheels run through the inner side rail of the machine head reversing support, an arc limiting rail is arranged on one side of the inner side rail of the machine head reversing support, the purpose is to prevent the rail trolley from being separated from the rail when the machine head or the machine tail part is reversed to cause conveyor faults, the rail trolley finishes the reversing of the machine head part and runs through the descending rail to the machine tail reversing support, the wheels run through the inner side rail of the machine tail reversing support, the arc limiting rail is also arranged on one side of the inner side rail of the machine tail reversing support, the rail trolley finishes the reversing of the machine tail part and then runs through the ascending rail, and.

The machine head and the machine tail reversing bracket are of special structures and are not the frame of the common belt conveyor. As shown in fig. 3a, 3b, and 3c, the reversing bracket includes a supporting bracket and two sets of track plates mounted on the supporting bracket, the track plates are annular semi-circular plates coaxial with the head/tail, the two sets of track plates are arranged in parallel, the space between the two sets of track plates is the movement space when the track trolley reverses, the space can avoid the steel plate spring at the outermost side of the track trolley from interfering with the reversing bracket, and the inner arc surface and the outer arc surface of the two sets of annular track plates are both limiting surfaces when the wheel-type functional element reverses. The inner arc surface can keep the U-shaped shape of the conveying belt on a horizontal rail when the conveying belt passes through the reversing support, the inner arc surface and the outer contour arc surface of the corresponding machine head or tail arc limiting rail form a running limiting rail when the rail trolley is reversed, and the circular chain sprocket pulls the rail trolley, so that the conveying belt fixed on the rail trolley is driven to smoothly complete reversing.

Meanwhile, the outer cambered surfaces of the two groups of track plates of the machine head/machine tail reversing support are symmetrically provided with inner concave surfaces, and the inner concave surfaces on the two groups of track plates form a radial limiting surface for preventing the wheel type functional element; the inner cambered surfaces of the two groups of track plates of the machine head/machine tail reversing support are provided with bosses for preventing the wheel type functional element from axially moving.

The invention discloses a circular chain sprocket with a special structure, wherein cylindrical rollers with the diameter slightly larger than that of the circular chain sprocket but slightly lower than that of a trolley frame are added at two sides of a universal circular chain sprocket, so that when a conveying belt passes through a reversing support, the circular chain sprocket drives the coaxial cylindrical rollers, and further the bottom of the conveying belt can be driven to smoothly complete reversing.