CN107627934A - A kind of self-discharging semitrailer - Google Patents

Abstract

The invention provides a self-unloading semi-trailer. A horizontal self-unloading device and a driving device are arranged on the carriage body. The horizontal self-unloading device includes a support rail, a chain, a pallet, and a transmission device. There are two types of transmission devices, one is two ends The rigid transportation board with a curved board, and the second is a flexible transportation board with one end fixed and the other end as an unfixed free end. Both methods abandon the pallet, which greatly reduces the self-unloading system without reducing the load-bearing strength. the weight of. When the flexible transport board is used, the connection mode with the chain is changed, which greatly improves the efficiency of assembly and replacement. At the same time, by changing the structure of the vehicle body, the invention expands the horizontal self-unloading device in the lateral direction until it completely replaces the position of the bottom plate of the carriage, thereby improving the unloading efficiency of bulk cargo.

Description

A self-unloading semi-trailer

technical field

The invention belongs to the field of vehicle equipment, and in particular relates to a self-unloading semi-trailer.

Background technique

At this stage, in order to improve the unloading efficiency of bulk cargo loading vehicles, there are many models that install self-unloading rails or conveyor belts at the bottom of the compartment to solve the problem of bulk cargo self-unloading, but the width of the self-unloading rails or conveyor belts used in this method It is too narrow, causing a lot of bulk cargo to stay on both sides of the compartment when it is unloading. The Chinese patent application number is 201410151338.7, which discloses a self-unloading semi-trailer. A horizontal self-unloading device is installed in the middle of the bottom of the carriage. One end is fixed and the other end is a free end. In order to achieve the complete unloading of the bulk cargo, an L-shaped movable corner plate is set inside the carriage, and the hydraulic telescopic oil cylinder is used to control the L-shaped movable corner plate to gather the bulk cargo to the middle part. The applicant applied for a patent in the early stage, the name is a vehicle-mounted bulk cargo self-unloading system, the patent number is: 201710652419.9, in order to improve the unloading efficiency, by modifying the overall structure of the carriage, the bearing beams are set at both ends of the carriage body, The space is reserved so that the horizontal self-unloading device completely replaces the car floor and lays flat on the bottom of the car body. At the same time, two kinds of transport carriers are used, one is a conveyor belt, and the other is similar to the above-mentioned patent. One end is fixed and the other end is a free end. In addition, the transmission plates partially overlapped with each other greatly improve the unloading efficiency, but the technical solutions adopted by the above two patents have the following disadvantages:

1. Using traditional fixing methods such as bolts or rivets to fix the transmission plate or rubber track on the transmission chain is time-consuming and labor-intensive. Generally, it takes a long time to manually install it on the transmission chain one by one. At the same time, the transmission plate or rubber track is damaged. When needing to change, also very troublesome, not particularly convenient.

2. Since one end is fixed and the other end is a flexible transmission plate or rubber crawler, when transporting bulk cargo with a certain humidity or viscosity, the bulk cargo is easy to adhere to the transmission plate or rubber crawler and scatter through the free end To the inside of the drive system, resulting in long-term operation will wear out the devices in the drive system.

Contents of the invention

In view of the above technical defects, the present invention improves the technical solution adopted in the above invention to eliminate the above defects.

The technical solution adopted in the present invention is: to provide a self-unloading semi-trailer, including a tractor head, a carriage body, and the carriage body includes a horizontal self-unloading device and a driving device; Cargo, the horizontal self-unloading device includes support rails, chains, and transmission devices. The support rails are perpendicular to the beams and fixed on the upper part of the beams. Rollers are set on the chains, and the rollers rotate on the support rails. There are wing plates on the outer chain plates of the chains. , the transmission device is composed of a number of transmission plates overlapping each other from the end to the end, the transmission plate is fixed on the wing plate, and the transmission device can move with the chain.

The driving device includes a driving sprocket and a driven sprocket, a driving shaft and a driven shaft, and a hydraulic motor. The bearing housing, the driving sprocket and the driven sprocket are also located at the rear end and the front end of the bottom of the carriage body. The driving sprocket is arranged on the drive shaft and rotates with the rotation of the drive shaft. The chain is wrapped around the front and rear of the carriage body The driven sprocket at the end and the driving sprocket are meshed with the driving sprocket and driven by the driving sprocket to rotate circularly, and the hydraulic motor is used as a power source to drive the driving shaft to rotate.

Preferably, the transmission plate is a hard plate, the middle of the transmission plate is fixed on the wing plate, the two ends of the transmission plate are arc-shaped surfaces, and the arc-shaped surface is the overlapping part of two adjacent transmission plates. When reaching the drive sprocket, the arc surfaces slide against each other, but the adjacent arc surfaces always partially overlap each other, so that the transmission device is always in a closed state, preventing bulk cargo from falling into the drive device.

Preferably, all the outer chain plates on the chain have wing plates, and a transmission plate is fixed on each pair of wing plates.

Preferably, the transmission plate is a flexible plate, one end of the transmission plate is fixed on the wing plate below it by setting a clamping sleeve, and the other end is a free end, and the free ends of the transmission plate overlap and are fixed on the adjacent transmission plate At one end of the wing plate, the cross section of the clamping sleeve is an American bow shape. The transmission plate is embedded in the clamping sleeve. The clamping sleeve fixes one end of the transmission plate through bolts or rivets. The bottom of the clamping sleeve is welded with a backing plate. The backing plate is I-shaped, and the wing plate on the chain plate of the chain is a vertical plate without bending. There are fixing holes on the wing plate for the pins to pass through. The groove part of the I-shaped on the backing plate can be embedded in the wing plate. Furthermore, the transmission plate can be movably connected to the chain through the clamping sleeve and the backing plate.

Preferably, all the outer chain plates on the chain have wing plates, and the wing plates are vertical plates without bending, and are on the same plane as the outer chain plates of the chain, and there is at least one outer link plate between the outer chain plates connected to the transmission plate. The chain plate and the wing plate of the outer chain plate not connected to the transmission plate are connected to the transmission plate support tube, and the connection mode between the transmission plate support tube and the wing plate is the same as that of the clamping sleeve and the wing plate.

Preferably, the position of the wing plate on the outer chain plate of the chain is at one end of the outer chain plate.

Preferably, the horizontal self-unloading device completely replaces the carriage floor and lays flat on the bottom of the carriage, and the set of support rails, chains and driving sprockets is provided with three or four lanes.

Preferably, I-shaped supporting girders are arranged at the lower parts of both sides of the carriage body, the supporting girders are located at both ends of the beams, the bearing seats are fixed on the webs of the supporting girders, and a transverse box is set between the supporting girders and the suspension. Beam, the supporting girder is fixed on the suspension by the box beam.

Preferably, the box beam is a straight box beam or a concave box beam, gaps are provided at both ends of the box beam for receiving the lower wing of the I-shaped support beam, and grooves are opened at the bottom of the gap for engaging the I-shaped support beam Lower wing.

Preferably, the box girder is an I-shaped beam with a single web or a hollow I-shaped beam with two webs.

Preferably, a support bearing is also installed on the drive shaft, and the support bearing is fixed on the beam.

Preferably, the rollers are arranged on the chain shaft in the chain, the supporting track is a square track, the width of the supporting track is smaller than the width of the rollers on the chain, and the diameter of the rollers is smaller than the height of the chain plate.

Preferably, the rear compartment door of the carriage body is provided with a hydraulic unlocking device, the hydraulic unlocking device includes a hydraulic cylinder, a lock plate, and a limit device, the upper end of the rear compartment door is hingedly connected with the upper end of the compartment, and one end of the hydraulic cylinder It is hingedly connected with a point on the upper middle part of the rear compartment door, and the other end of the hydraulic cylinder is hingedly connected with one end of the lock plate through a rotating shaft. The lock plate is long, and the middle part of the lock plate is hinged and fixed on the side panel of the car body. On the middle and lower side of the lock plate, a lock hook is set on the other end of the lock plate, and a lock shaft that can be engaged with the lock hook is set on the rear compartment door. The position limiting device can limit the further downward movement of the position where the hydraulic cylinder is connected to the lock plate, so that the lock hook just breaks away from the lock shaft, and the hydraulic cylinder moves upward to jack up the rear compartment door.

Preferably, the limiting device is a fixed seat arranged at the connection position between the hydraulic cylinder and the lock plate, the fixed seat is fixed on the side panel, the fixed seat has a long hole for limiting, and the rotating shaft at one end of the hydraulic cylinder connected to the lock plate is inserted into the limit In the elongated hole, the limit elongated hole limits the movement range of the end connecting the hydraulic cylinder and the lock plate by controlling the rotating shaft.

Preferably, the limiting device includes an upper top plate and a lower top plate, the upper top plate and the lower top plate are fixed on the side panel, the upper top plate is located at the upper part of the end where the hydraulic cylinder is connected to the lock plate, and the lower top plate is located at the lower part of the end where the hydraulic cylinder is connected with the lock plate , the upper top plate restricts the moving position of the lock plate when the tailgate is closed, and the lower top plate restricts the moving position of the lock plate when the tailgate is opened.

Beneficial effects of the present invention: 1. To optimize the design of the transport device, two methods can be adopted, one is a rigid transport plate with arc-shaped plates at both ends, and the other is a flexible transport with one end fixed and the other end is an unfixed free end The two methods have abandoned the pallet, which greatly reduces the weight of the self-unloading system without reducing the load-bearing strength.

2. When the flexible transport board is used, the connection mode with the chain is changed, which greatly improves the efficiency of assembly and replacement.

3. The present invention optimizes the design of the carriage structure, moves the two supporting girders to the ends of the beams, reserves enough space in the middle of the carriage to load the horizontal self-unloading device, and then the horizontal self-unloading device sinks and loads without additional increase At the same time, the horizontal self-unloading device expands laterally until it fully reaches the width of the car body, so the horizontal self-unloading device does not occupy additional space in the car body, and the volume of the car body remains unchanged.

4. The invention greatly improves the unloading efficiency of bulk cargo. Compared with the horizontal self-unloading device with one-third of the width of the box body, the invention only needs to increase the power of the hydraulic motor by 1.3 times, which can achieve an increase of 2.5 times unloading efficiency.

5. The rear compartment door of the carriage body of the present invention is equipped with a hydraulic unlocking device, so that the rear compartment door can be automatically opened and closed, and the operating efficiency is improved.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is rear view of the present invention;

Fig. 3 is a top view of the first embodiment of the present invention;

Figure 3-1 is a partial schematic diagram of the first embodiment of the present invention;

Fig. 3-2 is a sectional view of the tail of the first embodiment of the present invention;

Fig. 4 is the top view of the second embodiment of the present invention;

Figure 4-1 is a partial schematic diagram of the second embodiment of the present invention;

Figure 4-2 is a sectional view of the tail of the second embodiment of the present invention;

Fig. 4-3 is a schematic diagram of the backing plate structure of the second embodiment of the present invention;

Fig. 5 is the structure schematic diagram that the vehicle body structure of the present invention adopts concave box beam;

Fig. 6 is the specific structural representation of concave box beam;

Fig. 7 is a cross-sectional schematic diagram of a box beam having two webs;

Fig. 8 is a schematic structural view of the rear panel of the present invention when it is closed by a fixed seat;

Fig. 9 is a schematic structural view of the rear compartment panel of the present invention when the fixed seat is used to open;

Fig. 10 is a schematic structural view of the rear panel of the present invention when the roof is closed;

Fig. 11 is a schematic structural view of the rear panel of the present invention when the roof is opened.

Among the figure: 1-car body; 2-transmission device; 201-the transmission plate in the first embodiment; 2011-the arc surface on the transmission plate in the first embodiment, 202-the transmission plate in the second embodiment 2021-clamping sleeve; 2022-backing plate; 2023-transmission plate support tube; 3-chain; 301-wing plate in the first embodiment; 302-roller; 303-outer chain plate; 304-the first Wing plate in two kinds of embodiments; 4-support track; 5-support bearing; 6-bearing seat; 7-support girder; 8-box beam; 801-notch on the box beam; 9-drive sprocket; 10-suspension; 11-drive shaft; 12-beam; 13-hydraulic motor; 14-rear door; 15-hydraulic cylinder; 16-lock plate; 1601-lock hook; 17-fixed ; 18-lock shaft; 19-upper top plate; 20-lower top plate.

detailed description

Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1, 2, 3, 3-1, 3-2, 5, 6, and 7, the first embodiment of the present invention is to provide a self-unloading semi-trailer, including a tractor head, a compartment body 1 , the carriage body consists of two parts, the horizontal self-unloading device and the driving device, the horizontal self-unloading device is located at the bottom of the car body, and is used to load and unload bulk cargo, and the horizontal self-unloading device includes a support rail 4, a chain 3, a transmission device 2, and a support rail 4 is perpendicular to crossbeam 12 and is fixed on the top of crossbeam 12, and roller 302 is arranged on chain 3, and roller 302 rotates on support track 4, has wing plate 301 on the outer chain plate 303 of chain 3, and transmission device 2 is made of several It consists of transmission plates 201 overlapped head to tail, the transmission plates are fixed on the wing plates 301 , and the transmission device 2 can move with the chain 3 .

Drive device comprises drive sprocket 9 and driven sprocket, drive shaft 11 and driven shaft, hydraulic motor 13, and drive shaft 11 is set at the rear end of compartment body 1 bottom, and driven shaft is set at the front end, and drive shaft 11 and driven shaft Bearing blocks 6 are arranged at the two ends of the moving shaft, and the driving sprocket 9 and the driven sprocket are also positioned at the rear end and the front end of the compartment body 1 bottom, and the driving sprocket 9 is arranged on the driving shaft 11 and rotates along with the driving shaft 11 Rotate, the chain 3 surrounds the driven sprocket and the driving sprocket 9 at the front and rear ends of the compartment body 1 and is meshed with the driving sprocket 9 and driven by the driving sprocket 9 to rotate circularly, and the hydraulic motor 13 drives the driving shaft 11 to rotate as a power source. The hydraulic motor 13 can be respectively provided with one on both sides of the box body 1, and also can only be provided with one on one side.

Furthermore, the transmission plate 201 is a hard plate, which can be made of steel or aluminum alloy. The outer chain plate 303 with the wing plate 301 on the chain 3 can fix a transmission plate 201, and the adjacent transmission plate 201 The outer chain plate 303 can also be spaced between them, and the middle position of the transmission plate 201 is fixed on the wing plate 301 by means of bolts or rivets. 9, the arc surface 2011 is the overlapping part of two adjacent transmission plates 201, when the transmission plate 201 rotates to the driving sprocket 9, the mutual sliding between the arc surfaces 2011, but the adjacent arc The shaped surfaces 2011 always partially overlap each other, so that the transmission device can completely wrap the internal drive device, and the drive device is in a closed state, thus preventing bulk goods from falling into the drive device. At the same time, the raised arc surface 2011 can drive the bulk cargo to move to the rear of the car body during unloading, improving the unloading efficiency.

Furthermore, the horizontal self-unloading device completely replaces the carriage floor and lays flat on the bottom of the carriage body. In order to enhance the load-bearing strength of the horizontal self-unloading device, a set of supporting rails 4, chains 3 and drive sprockets 9 is provided with three tracks. Or four lanes, of course, different numbers of lanes can also be set, and at the same time, the width of the transmission plate can be increased correspondingly so that it can be tiled on the bottom of the box body.

Furthermore, in order to prevent the additional horizontal self-unloading device from increasing the height of the car body, the supporting girder 7 supporting the car body is moved to both ends, so that it is located at the two ends of the beam 12, and the middle space is vacated. , the bearing seat 6 is sunk and fixed on the web plate of the supporting girder 7, and at the same time, in order to keep the bearing strength unchanged, a transverse box beam 8 is set between the supporting girder 7 and the suspension 10, and the supporting girder 7 is fixed by the box beam 8 On suspension 10. The box beam 8 can be a straight box beam or a concave box beam, preferably a concave box beam. The two ends of the box beam 8 are provided with a gap 801 for receiving the lower wing plate of the I-shaped support beam 7. The bottom of the gap 801 is opened. There is a groove 802 for engaging the lower wing of the I-shaped supporting girder 7 . The box beam 8 is an I-shaped beam with a single web or a hollow I-shaped beam with two webs.

Furthermore, a support bearing 5 is installed on the drive shaft 11 , and the support bearing 5 is fixed on the beam 12 . Such setting increases the support point of the drive shaft 11 and enhances the strength.

Further, the roller 302 is arranged on the chain shaft in the chain 3, the support track 4 is a square track, the width of the support track 4 is less than the width of the roller 302 on the chain 3, and the diameter of the roller 302 is less than the height of the chain 3 chain plates. Such arrangement ensures the support strength of the support rail 4 to the chain 3, and simultaneously reduces the frictional force between the support rail 4 and the roller 302 on the chain 3 as much as possible.

Furthermore, as shown in Figures 8, 9, 10 and 11, the rear compartment door 14 of the compartment body 1 is provided with a hydraulic unlocking device, which includes a hydraulic cylinder 15, a lock plate 16, and a limit device. The upper end of the rear compartment door 14 is hingedly connected with the upper end of the compartment body 1, and one end of the hydraulic cylinder 15 is hingedly connected with a point on the upper middle section of the rear compartment door 14. Hingedly connected, the lock plate 16 is strip-shaped, and the middle position of the lock plate 16 is hinged and fixed on the middle and lower side of the side compartment plate of the car body 1. The other end of the lock plate 16 is provided with a lock hook 1601, and the rear compartment door 14 is provided with a The lock shaft 18 engaged with the lock hook 1601 .

Limiting device can be two kinds, and a kind of is the fixed seat 17 that is arranged on the hydraulic oil cylinder 15 and lock plate 16 connection positions, and fixed seat 17 is fixed on the side compartment plate, and fixed seat 17 has the limit elongated hole, and hydraulic oil cylinder 15 and The rotating shaft connected to one end of the locking plate 16 is inserted into the limiting long hole, and the limiting long hole limits the movement range of the hydraulic cylinder 15 and the connecting end of the locking plate 16 by controlling the rotating shaft; the other includes an upper top plate 19 and a lower top plate 20, The upper top plate 19 and the lower top plate 20 are fixed on the side panel, the upper top plate 19 is located at the top of the end where the hydraulic cylinder 15 is connected to the lock plate 16, the lower top plate 19 is located at the bottom of the end where the hydraulic cylinder 15 is connected with the lock plate 16, and the upper top plate 19 limits The moving position of the lock plate 16 when the tailgate 14 is closed, the lower top plate 20 limits the movement position of the lock plate 16 when the tailgate 14 is opened.

When the hydraulic cylinder 15 jacks up the rear compartment door 14, the lock hook 1601 breaks away from the lock shaft 18 through leverage. At this time, the fixed seat 17 and the lower top plate 20 can limit the position where the hydraulic cylinder 15 is connected to the lock plate 16 to move down further, so that the lock Hook 1601 breaks away from lock shaft 18 just in time, and hydraulic oil cylinder 15 moves up and jacks up tailgate 14. When the hydraulic cylinder 15 shrinks to close the rear door 14, the fixed seat 17 and the upper top plate 19 can further move up the position where the hydraulic cylinder 15 is connected to the lock plate 16, so that the upper part of the hydraulic cylinder 15 shrinks, and then drives the rear door. 14 is closed, the lock hook 1601 locks the lock shaft 18.

Hydraulic unlocking device can be provided with one, also can respectively be provided with one at the both sides of tailgate 14.

As shown in Figures 4, 4-1, 4-2, and 4-3, the difference between the second embodiment of the present invention and the first embodiment is that the transmission device in the horizontal unloading device is changed, and the other devices are the same. The transmission plate 202 of the first embodiment adopts a flexible plate, such as rubber material, etc., one end of the transmission plate 202 is fixed on the wing plate 304 below it by setting a clamping sleeve 2021, and the other end is a free end, and the free end part of the transmission plate 202 The overlapping overlap is fixed on one end of the wing plate 304 on the adjacent transmission plate 202, and one end of the transmission plate 202 is inserted into the clamping sleeve 2021. 2021 fixes one end of the transmission plate 202 by bolts or rivets, the bottom of the clamping sleeve 2021 is welded with a backing plate 2022, the backing plate 2022 is I-shaped, and the wing plate 304 on the outer chain plate 303 of the chain 3 is not bent. Standing plate, the wing plate 304 has fixing holes for the pins to pass through, and the groove part of the shape on the backing plate 2022 can be embedded in the wing plate 304, and then the transmission plate 202 can be flexibly connected to the backing plate 2022 through the clamping sleeve 2021 and the backing plate 2022 Chain 3 on. The advantage of this setting is that on the one hand, the transmission plate 202 and the clamping sleeve 2021 can be assembled in the workshop, and then the backing plate 2022 on the clamping sleeve 2021 is fixed to the chain 3 by pins, which greatly reduces the difficulty of assembly and the labor intensity of the workers. On the other hand, if the transmission board is damaged, it is very convenient to replace it.

Furthermore, all the outer chain plates 303 on the chain 3 have wing plates 304, and the wing plates 304 are all vertical plates without bending, and are on the same plane as the outer chain plates 303 of the chain 3, and the outer chain plates 303 connected to the transmission plate 202 are on the same plane. At least one outer chain plate is spaced between the chain plates 303, and the transfer plate support pipe 2023 is connected to the wing plate of the outer chain plate not connected to the transfer plate, so as to further enhance the load-bearing strength of the transfer plate 202, and the connection between the transfer plate support tube 2023 and the wing plate 304 The connection method is the same as that of the clamping sleeve 2021 and the wing plate 304 .

Furthermore, the position of the wing plate 304 on the outer chain plate 303 of the chain 3 can be in the middle of the conventional outer chain plate, but it is preferably at one end of the outer chain plate 303, so that the supporting point of the load can be at each joint In the middle position of the chain, the force on the rollers 302 is more uniform, reducing the loss of the rollers 302.

The above are two specific implementations of the present invention. Of course, the present invention can also be further improved on the basis of the above. It is used to prevent the bulk cargo from scattering from the gap formed between the side panel and the conveyor belt; another example may be a number of emergency small doors on the side panel. The wicket can continue to be manually unloaded to ensure the completion of unloading. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. For those of ordinary skill in the art, the present invention can have various modifications and changes; all within the spirit and principles of the present invention , any modifications, equivalent replacements, improvements, etc., should be included within the protection scope of the present invention.

Claims (15)

1. a kind of self-discharging semitrailer, including tractor, car body, described car body includes horizontal dumping device with driving Dynamic device；

Described horizontal dumping device is in carriage body bottom, and for holding unloading bulk goods, described horizontal dumping device includes support Track, chain, transmitting device, described supporting track is perpendicular with crossbeam and is fixed on the top of crossbeam, on described chain Roller is set, roller rotated on supporting track, and wing plate carry on the outer plate of the chain, if described transmitting device for by The transmission board composition that dry head and the tail mutually overlap, described transmission board are fixed on wing plate, and transmitting device can move with chain；It is described Drive device include drive sprocket and driven sprocket, drive shaft and driven shaft, hydraulic motor, in the rear end of car body bottom Drive shaft is set, and front end sets the both ends setting bearing block of driven shaft, drive shaft and driven shaft, drive sprocket and driven sprocket Positioned at the rear end of car body bottom and front end, drive sprocket sets on the driving shaft and rotated with drive shaft turns, institute Driven sprocket and drive sprocket and with drive sprocket be meshed driven movable sprocket of the chain ring stated around car body front and back end Circulation rotating is driven, described hydraulic motor drives drive shaft turns as power source.

2. self-discharging semitrailer according to claim 1, it is characterised in that：Described transmission board is hard plate, transmission board Medium position is fixed on wing plate, and the both ends of transmission board are arcwall face, and described arcwall face is adjacent two pieces of transmission boards overlap joint Part, when transmission board is turned at drive sprocket, the mutual slip between arcwall face, but adjacent arcwall face has part all the time Mutually overlap joint so that transmitting device is constantly in closed state, prevents bulk goods from falling into inside drive device.

3. self-discharging semitrailer according to claim 2, it is characterised in that：All outer plates are respectively provided with the wing on the chain Plate, a transmission board is fixed on each pair wing plate.

4. self-discharging semitrailer according to claim 1, it is characterised in that：Described transmission board is flexible board, the transmission One end of plate is by setting retaining sleeve to fix on wing plate in its lower section, and the other end is free end, the free end of transmission board Partly overlapping one end for being overlapped on neighboring transmission plate and being fixed on wing plate, the cross-sectional type of the retaining sleeve is American arcuate, is passed In input board insertion retaining sleeve, retaining sleeve fixes one end of transmission board, the bottom weldering of described retaining sleeve by bolt or rivet It is connected to backing plate, described backing plate is I-shaped, and the wing plate on the carrier bar of the chain is the riser of no bending, described wing plate On be provided with fixing hole supply and marketing nail through the groove part of drum can be embedded in wing plate on the backing plate, and then transmission board passes through Retaining sleeve and backing plate can be movably attached on chain.

5. self-discharging semitrailer according to claim 4, it is characterised in that：All outer plates are respectively provided with the wing on the chain Plate, described wing plate are the risers for no bending, and same plane, the exterior chain being connected with transmission board are in chain board An outer plate is at least spaced between plate, transmission board support tube, transmission are connected on the wing plate for the outer plate for not connecting transmission board Plate support tube is with the connected mode of wing plate as the connected mode of retaining sleeve and wing plate.

6. self-discharging semitrailer according to claim 5, it is characterised in that：The opening position of wing plate on the chain board In one end of outer plate.

7. according to the self-discharging semitrailer described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterised in that：Described horizontal self-unloading Device substitutes platform floor and is laid in carriage body bottom completely, and described supporting track, chain and drive sprocket form a set of Device sets three Dao Huo tetra-.

8. self-discharging semitrailer according to claim 7, it is characterised in that：The two side ends bottom of the car body sets work The support crossbeam of type, described support crossbeam are in the end positions of crossbeam, and described bearing block is fixed on the abdomen of support crossbeam On plate, horizontal box beam is set between described support crossbeam and suspension, by box beam crossbeam will be supported to be fixed on suspension.

9. self-discharging semitrailer according to claim 8, it is characterised in that：Described box beam is straight trip box beam or spill box Beam, the both ends of the box beam set breach to be used for the lower wing plate for accepting drum support crossbeam, and the bottom of the breach is provided with groove For engaging the lower wing plate of drum support crossbeam.

10. self-discharging semitrailer according to claim 9, it is characterised in that：Described box beam is the work with single web Type beam has two web hollow type drum beams.

11. vehicle-mounted bulk goods self-discharging system according to claim 10, it is characterised in that：Peace is also set up in described drive shaft Spring bearing is filled, spring bearing is fixed on crossbeam.

12. self-discharging semitrailer according to claim 11, it is characterised in that：Described roller is arranged on the chain in chain On axle, described supporting track is square track, and the width of the supporting track is less than the width of the roller on chain, the rolling The diameter of wheel is less than the height of chain and chain-plate.

13. self-discharging semitrailer according to claim 9, it is characterised in that：The rear cargo door of the car body sets hydraulic pressure Formula opens locking device, and described fluid pressure type, which opens locking device, includes hydraulic jack, jam plate, stopping means, the upper end of described rear cargo door It is articulated and connected with the upper end of carriage body, a point articulated company of middle upper section part is located on one end of the hydraulic jack and rear cargo door Connect, the other end of hydraulic jack and one end of jam plate are articulated and connected by rotary shaft, and described jam plate is strip, in jam plate Portion position is hingedly fixed in the middle downside of carriage body side carriage plate, and the other end of jam plate sets latch hook, energy is set on described rear cargo door Enough lock shafts engaged with latch hook, when hydraulic jack jacks up rear cargo door, lock shaft is departed from by leverage latch hook, it is now described Stopping means can limit the position that hydraulic jack is connected with jam plate and further move down so that latch hook is just off lock shaft, hydraulic pressure Oil cylinder moves up jack-up rear cargo door.

14. self-discharging semitrailer according to claim 13, it is characterised in that：Described stopping means is to be arranged on hydraulic oil The fixed seat of cylinder and jam plate link position, described fixed seat are fixed on side carriage plate, and fixed seat is provided with spacing elongated hole, hydraulic oil The rotary shaft that cylinder is connected one end with jam plate is inserted in spacing elongated hole, and spacing elongated hole limits hydraulic jack by controlling rotary shaft The mobile range of one end is connected with jam plate.

15. self-discharging semitrailer according to claim 13, it is characterised in that：Described stopping means includes upper plate with Top plate, described upper plate and lower roof plate are fixed on side carriage plate, and upper plate is located at hydraulic jack and the upper of one end is connected with jam plate Portion, lower roof plate are located at the bottom that hydraulic jack is connected one end with jam plate, the mobile position of jam plate when rear cargo door is closed in upper plate limitation Put, the shift position of jam plate when rear cargo door is opened in lower roof plate limitation.