Dumper body

Abstract

The invention provides a dumper body, and belongs to the technical field of dumpers. Comprising a car hopper, auxiliary frames are arranged on the upper portions of the two sides of the car hopper, screw rods are rotationally arranged in the auxiliary frames, the two screw rods are jointly in threaded connection with a side scraping frame used for cleaning the interior of the car hopper, sliding strips are arranged on the two inner side walls of the car hopper, the side scraping frame and the sliding strips are in sliding fit, and a first bevel gear is connected to the position, located at the head of the car hopper, of the end of one screw rod; a first bevel gear is arranged on the lower portion of the car hopper, a second bevel gear is meshed with the lower portion of the first bevel gear and fixedly arranged on a rotating shaft of a motor, the motor is fixedly arranged on the car hopper, a synchronizing mechanism is arranged between the two screw rods, and two transmission wheels of the synchronizing mechanism are installed on the two screw rods respectively. The screw rod drives the side scraping frame to move from the head portion to the tail portion of the car hopper, the two supports of the side scraping frame clean the inner side wall of the car hopper, the scraping bottom plate cleans the inner bottom face of the car hopper, and cleaning of the interior of the car hopper can be automatically completed.

Description

Technical Field

[0001] The present invention belongs to the technical field of dump trucks, and particularly relates to a dump truck body. Background Art

[0002] A dump truck, also known as a tipping truck, is a vehicle equipped with a hydraulic or mechanical lifting mechanism that can easily achieve self-unloading of goods. The tipping method of its carriage is flexible and diverse, mainly divided into two types: backward tipping and side tipping. Among them, backward tipping is the most common method. The carriage tips with the connection point between its rear end and the chassis as the axis, smoothly unloading the goods to the rear of the vehicle. With its excellent unloading performance, dump trucks are widely used in many fields such as construction, mining, transportation, and agriculture, and have become an essential and important equipment in modern logistics transportation.

[0003] With the continuous progress of technology and the changing market demands, the dump truck industry is in a booming development stage. However, currently, the body design of dump trucks still mainly uses the backward tipping method for unloading, which has deficiencies in dealing with highly viscous materials. The materials are prone to adhering to the inner wall of the hopper and are difficult to clean. Currently, cleaning such materials mainly relies on manual methods, which are not only inefficient but also have certain safety hazards and urgently need improvement. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a dump truck body.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions: A dump truck body includes a hopper. On both upper sides of the hopper, there are auxiliary frames. In each auxiliary frame, a screw rod is rotatably provided. Two screw rods are commonly threadedly connected with a side scraping frame for cleaning the inside of the hopper. On both inner side walls of the hopper, there are sliding strips. The side scraping frame forms a sliding fit with the sliding strips. At the end of one screw rod and located at the front of the hopper, there is a bevel gear one. Below the bevel gear one, there is a meshing bevel gear two. The bevel gear two is fixedly provided on the rotating shaft of a motor. The motor is fixedly provided on the hopper. Between the two screw rods, there is a synchronization mechanism. The two transmission wheels of the synchronization mechanism are respectively installed on the two screw rods.

[0006] Further, the hopper is rotatably provided on a bottom frame. The bottom frame is installed on the vehicle. Between the hopper and the bottom frame, there is a hydraulic cylinder. The bottom of the hydraulic cylinder is rotatably provided on the hopper. The end of the telescopic shaft of the bottom frame is rotatably provided below the hopper.

[0007] Furthermore, a first rotating pin is provided on the inner side surface of each of the two brackets of the side scraping frame. A swing rod is rotatably provided on each first rotating pin. A first torsion spring is sleeved outside the first rotating pin. Two ends of the first torsion spring are respectively connected to the swing rod and the first rotating pin. A limiting strip is provided at the end of the first rotating pin. A retaining platform for blocking the rotation of the limiting strip is provided on the swing rod. The bottoms of the two swing rods are commonly connected to a scraping bottom plate for connecting to the inner bottom surface of the carriage.

[0008] Furthermore, a locking cavity is provided in each of the two brackets of the side scraping frame. The opening of the locking cavity faces the central axis direction of the carriage. The upper part of the locking cavity communicates with an unlocking cavity. The opening of the unlocking cavity faces the tail direction of the carriage. A locking bar is slidably provided in the locking cavity. A spring is connected between the inner wall of the locking cavity and the locking bar. The locking bar extends to the outside of the side scraping frame bracket through the opening of the locking cavity. The end of the locking bar is a bevel surface. A locking hole for cooperating with the locking bar is provided above the rotation point of the swing rod.

[0009] Furthermore, an unlocking platform is provided on the upper part of the locking bar, and the unlocking platform is located in the unlocking cavity. A wedge block for inserting into the opening of the unlocking cavity is provided at the tail of the carriage, and the wedge block is used to drive the unlocking platform to move.

[0010] Furthermore, second rotating pins are provided on the outer side surfaces of the tails of the two sub-frames. The two second rotating pins commonly rotatably connect a cover for covering the opening at the tail of the carriage. A second torsion spring is sleeved outside the second rotating pin. Two ends of the second torsion spring are respectively connected to the second rotating pin and the cover. Arc surfaces are provided on the upper parts of both sides of the cover. A retaining frame for preventing the rotation of the closing block is provided on the side surface of the closing block. The retaining frame is fixedly provided on the bottom frame. A retaining block for preventing the excessive rotation of the cover is provided on the upper part of the sub-frame.

[0011] Furthermore, a rotating plate is rotatably provided on the upper part of the side scraping frame. An arc surface is provided on the upper part of the rotating plate, and the side surface of the rotating plate contacts the inner wall of the head of the carriage. A third torsion spring is connected between the side scraping frame and the rotating plate. A plurality of spring shafts are connected to the lower surface of the rotating plate. A scraping cover plate for cleaning the inner wall of the cover is commonly connected below the plurality of spring shafts.

[0012] Furthermore, top sealing plates are connected to the lower surfaces of both ends of the scraping cover plate. The two top sealing plates respectively contact two sliding strips, and the top sealing plates are used to block the opening of the locking cavity.

[0013] The beneficial effects of the present invention compared with the prior art are: (1) The present invention provides power through a motor, and then transmits the power through bevel gear 1 and bevel gear 2, so that the screw drives the side scraping frame to move from the head of the hopper to the tail. The two brackets of the side scraping frame clean the inner side wall of the hopper, and the scraping bottom plate cleans the inner bottom surface of the hopper, that is, it can automatically complete the cleaning of the inside of the hopper; (2) When the hopper of the present invention rotates and discharges materials on the bottom frame, the closing block is separated from the blocking frame, and the torsion spring 2 provides a torsional force to drive the cover to rotate by 90 degrees. The cover contacts the blocking block, and the cover is completely separated from the materials, so that the discharging can be carried out quickly; (3) When the side scraping frame of the present invention moves to the tail of the hopper, the torsion spring 3 provides power to make the rotating plate rotate by 90 degrees, and the top sealing plate is separated from the sliding strip. The spring shaft extends, and the scraping cover plate contacts the cover that remains open, removing the materials on the inner side surface of the cover. And because the length of the spring shaft is greater than the height of the cover, it can ensure that the scraping cover plate can clean the entire inner side wall of the cover; (4) When the side scraping frame of the present invention moves from the tail of the hopper back to the head again, the wedge block is separated from the unlocking platform, and the spring provides an elastic force to make the end inclined surface of the locking bar move back to the outside of the locking cavity again. At this time, the locking bar is not in the locking hole. During this process, the scraping bottom plate does not clean the inner bottom surface of the hopper, avoiding pushing the materials in the hopper back to the head of the hopper; (5) After the hopper of the present invention completes discharging, the hopper rotates back to the horizontal state in the bottom frame again. During this process, the blocking frame first contacts the upper arc surface of the closing block, so that the cover rotates reversely on the rotating pin 2. Finally, the blocking frame transitions to contact the side surface of the closing block, preventing the cover from rotating, so that the cover can stably block the tail opening of the hopper again. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the front of an embodiment of the present invention.

[0015] Figure 2 is a schematic structural diagram of the bottom of an embodiment of the present invention.

[0016] Figure 3 is Figure 2 the partial enlarged view at A in

[0017] Figure 4 is a schematic structural diagram of the installation of the sliding strip in the hopper of the present invention.

[0018] Figure 5 is Figure 4 the partial enlarged view at B in

[0019] Figure 6 is a schematic structural diagram of the installation of the side scraping frame and the rotating plate of the present invention.

[0020] Figure 7 is a schematic structural diagram of the swing rod after rotation of the present invention.

[0021] Figure 8It is a schematic structural diagram of the installation of the side scraping frame and the scraping bottom plate of the present invention.

[0022] Figure 9 It is Figure 8 The partial enlarged view at position C in

[0023] Figure 10 It is Figure 8 The partial enlarged view at position D in

[0024] Figure 11 It is a schematic structural diagram of the installation of the cover and the closing block of the present invention.

[0025] Figure 12 It is Figure 1 The partial enlarged view at position E in

[0026] Figure 13 It is a schematic structural diagram of the installation of the scraping cover plate of the present invention.

[0027] Reference numerals in the drawings: 1 - dump truck body; 2 - auxiliary frame; 3 - screw rod; 4 - side scraping frame; 401 - locking cavity; 402 - unlocking cavity; 5 - slide bar; 6 - bevel gear one; 7 - bevel gear two; 8 - motor; 9 - synchronization mechanism; 10 - bottom frame; 11 - hydraulic cylinder; 12 - pivot pin one; 13 - swing rod; 1301 - locking hole; 14 - torsion spring one; 15 - limiting strip; 16 - retaining platform; 17 - scraping bottom plate; 18 - locking bar; 1801 - unlocking platform; 19 - spring; 20 - wedge block; 21 - pivot pin two; 22 - cover; 23 - torsion spring two; 24 - closing block; 25 - retaining frame; 26 - retaining block; 27 - rotating plate; 28 - torsion spring three; 29 - spring shaft; 30 - scraping cover plate; 31 - top cover plate. Specific embodiments

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] As Figures 1 to 13 shown, a self-unloading vehicle body includes a dump truck body 1, auxiliary frames 2 are provided on both upper sides of the dump truck body 1, screw rods 3 are rotatably provided in the auxiliary frames 2, and two screw rods 3 are commonly threadedly connected to a side scraping frame 4 for cleaning the inside of the dump truck body 1. Slide bars 5 are provided on both inner side walls of the dump truck body 1, and the side scraping frame 4 forms a sliding fit with the slide bars 5. One end of a screw rod 3 and located at the head of the dump truck body 1 is connected with a bevel gear one 6, and a bevel gear two 7 is meshed below the bevel gear one 6. The bevel gear two 7 is fixedly provided on the rotating shaft of a motor 8, the motor 8 is fixedly provided on the dump truck body 1, and a synchronization mechanism 9 is provided between the two screw rods 3. Two transmission wheels of the synchronization mechanism 9 are respectively installed on the two screw rods 3.

[0030] Among them, the synchronization mechanism 9 is composed of two transmission wheels and a transmission belt. The two transmission wheels are wound around the transmission belt together. When one transmission wheel rotates, power is transmitted through the transmission belt to make the other transmission wheel rotate synchronously.

[0031] Specifically, the motor 8 drives the bevel gear II 7 to rotate, transmits power through the bevel gear I 6, makes a screw 3 rotate, and then transmits power through the synchronization mechanism 9 to make the other screw 3 rotate synchronously. The two screws 3 drive the side scraping frame 4 to move horizontally at the same time. The side scraping frame 4 scrapes off the materials adhered to the inner wall of the hopper 1 and pushes the materials towards the opening of the hopper 1. At the same time, the side scraping frame 4 slides on the slide bar 5 to make the movement of the side scraping frame 4 smoother.

[0032] The hopper 1 is rotatably arranged on the bottom frame 10, the bottom frame 10 is installed on the vehicle, a hydraulic cylinder 11 is arranged between the hopper 1 and the bottom frame 10. The bottom of the hydraulic cylinder 11 is rotatably arranged on the hopper 1, and the end of the telescopic shaft of the bottom frame 10 is rotatably arranged below the hopper 1.

[0033] Specifically, when the telescopic shaft of the hydraulic cylinder 11 extends, it drives the hopper 1 to rotate on the bottom frame 10, and the hopper 1 starts to discharge materials.

[0034] Considering that when cleaning the inner bottom surface of the hopper 1, when the side scraping frame 4 moves towards the tail of the hopper 1, it is necessary to clean the inner bottom surface of the hopper 1; when the side scraping frame 4 returns to the head of the hopper 1, in order to avoid pushing the materials in the hopper 1 back to the head of the hopper 1, so during this process, it is not necessary to clean the materials at the bottom of the hopper 1. Rotating pins I 12 are arranged on the inner sides of the two brackets of the side scraping frame 4, swing rods 13 are rotatably arranged on the rotating pins I 12, torsion springs I 14 are sleeved outside the rotating pins I 12, and the two ends of the torsion spring I 14 are respectively connected to the swing rod 13 and the rotating pin I 12. A limiting strip 15 is arranged at the end of the rotating pin I 12, and a retaining platform 16 for blocking the rotation of the limiting strip 15 is arranged on the swing rod 13. The bottoms of the two swing rods 13 are commonly connected with a scraping bottom plate 17 for connecting the inner bottom surface of the hopper 1. A protective cover for protecting the torsion spring I 14 is arranged on the swing rod 13.

[0035] Lock cavities 401 are arranged in both brackets of the side scraping frame 4. The openings of the lock cavities 401 face the central axis direction of the hopper 1. The upper part of the lock cavity 401 is communicated with an unlocking cavity 402. The opening of the unlocking cavity 402 faces the tail direction of the hopper 1. A lock bar 18 is slidably arranged in the lock cavity 401. A spring 19 is connected between the inner wall of the lock cavity 401 and the lock bar 18. The lock bar 18 extends to the outside of the bracket of the side scraping frame 4 through the opening of the lock cavity 401. The end of the lock bar 18 is a bevel surface, and a lock hole 1301 for cooperating with the lock bar 18 is arranged above the rotation point of the swing rod 13.

[0036] The upper part of the locking bar 18 is provided with an unlocking platform 1801, and the unlocking platform 1801 is located in the unlocking cavity 402. The tail of the hopper 1 is provided with a wedge block 20 for inserting into the opening of the unlocking cavity 402, and the wedge block 20 is used to drive the unlocking platform 1801 to move.

[0037] Specifically, when the side scraping frame 4 moves from the head of the hopper 1 to the tail, the locking bar 18 is inserted into the locking hole 1301, preventing the swing bar 13 from rotating on the first rotating pin 12. The swing bar 13 and the brackets of the side scraping frame 4 are in a coplanar state, and the first torsion spring 14 is in a state of torsional energy storage. Therefore, the two brackets of the side scraping frame 4 clean the inner side wall of the hopper 1, and the scraping bottom plate 17 cleans the inner bottom surface of the hopper 1. When the side scraping frame 4 moves to the tail of the hopper 1, the wedge block 20 is inserted into the unlocking cavity 402, and the inclined surface of the wedge block 20 contacts the unlocking platform 1801, driving the unlocking platform 1801 to move, the spring 19 is compressed, and the locking bar 18 retracts into the locking cavity 401, and the locking bar 18 is separated from the locking hole 1301. The first torsion spring 14 provides power to drive the swing bar 13 to rotate. After the retaining platform 16 on the swing bar 13 contacts the limiting strip 15, the swing bar 13 stops rotating. At this time, the scraping bottom plate 17 no longer contacts the inner bottom surface of the hopper 1. When the side scraping frame 4 moves from the tail of the hopper 1 to the head again, the wedge block 20 is separated from the unlocking platform 1801, and the spring 19 provides elastic force to move the end inclined surface of the locking bar 18 back to the outside of the locking cavity 401. At this time, the locking bar 18 is not in the locking hole 1301. During this process, the scraping bottom plate 17 does not clean the inner bottom surface of the hopper 1. When the side scraping frame 4 moves back to the head of the hopper 1, the upper end of the swing bar 13 starts to contact the inner wall of the head of the hopper 1, driving the swing bar 13 to rotate in the reverse direction, and the first torsion spring 14 starts to store energy, so that the swing bar 13 and the side scraping frame 4 are in a coplanar rotation again, and the scraping bottom plate 17 contacts the inner bottom surface of the hopper 1 again. During this process, when the swing bar 13 passes through the inclined surface of the locking bar 18, it drives the locking bar 18 to move into the locking cavity 401, and the spring 19 is compressed. When the locking hole 1301 coincides with the locking bar 18, the spring 19 provides elastic force to insert the locking bar 18 back into the locking hole 1301.

[0038] On the outer side surfaces of the tails of the two sub-frames 2, there are second rotating pins 21. The two second rotating pins 21 are jointly rotatably connected with a cover 22 for covering the opening at the tail of the hopper 1. A second torsion spring 23 is sleeved outside the second rotating pin 21, and the two ends of the second torsion spring 23 are respectively connected to the second rotating pin 21 and the cover 22. On the upper parts of both sides of the cover 22, there are closing blocks 24. The upper part of the closing block 24 is an arc surface, and on the side surface of the closing block 24, there is a retaining frame 25 for preventing the closing block 24 from rotating. The retaining frame 25 is fixedly arranged on the bottom frame 10, and on the upper part of the sub-frame 2, there is a stop block 26 for preventing the cover 22 from rotating excessively.

[0039] Specifically, when the hopper 1 is moving materials, the blocking frame 25 contacts the side surface of the closing block 24, keeping the closing block 24 and the cover 22 in a vertical state, that is, the cover 22 blocks the tail opening of the hopper 1 to prevent the materials from sliding off from the tail opening of the hopper 1. When the hopper 1 rotates for discharging on the bottom frame 10, the closing block 24 separates from the blocking frame 25, and the second torsion spring 23 provides a torsional force to drive the cover 22 to rotate by ninety degrees. The cover 22 contacts the blocking block 26, and the cover 22 is completely separated from the materials, enabling rapid discharging. After the hopper 1 completes discharging, the hopper 1 rotates back to the horizontal state in the bottom frame 10. During this process, the blocking frame 25 first contacts the upper arc surface of the closing block 24, so that the cover 22 rotates reversely on the second rotating pin 21. Finally, the blocking frame 25 transitions to contact the side surface of the closing block 24, and the cover 22 re-blocks the tail opening of the hopper 1.

[0040] A rotating plate 27 is provided at the upper part of the side scraping frame 4. The upper part of the rotating plate 27 is provided with an arc surface, and the side surface of the rotating plate 27 contacts the inner wall of the head of the hopper 1. A third torsion spring 28 is connected between the side scraping frame 4 and the rotating plate 27. The lower surface of the rotating plate 27 is connected with a plurality of spring shafts 29, and a scraping cover plate 30 for cleaning the inner wall of the cover 22 is commonly connected below the plurality of spring shafts 29.

[0041] The lower surfaces of both ends of the scraping cover plate 30 are connected with top sealing plates 31. The two top sealing plates 31 respectively contact the two sliding strips 5, and the top sealing plates 31 are used to block the opening of the locking cavity 401.

[0042] Specifically, when the side scraping frame 4 is located at the head of the hopper 1, the top sealing plate 31 contacts the sliding strip 5, and the top sealing plate 31 blocks the opening of the unlocking cavity 402. The spring shaft 29 is in a compressed state. The side surface of the rotating plate 27 contacts the inner wall of the head of the hopper 1, and the third torsion spring 28 is in an energy storage state. The scraping cover plate 30 is located between the two brackets of the side scraping frame 4, and the scraping cover plate 30 and the side scraping frame 4 are in a coplanar state. When the side scraping frame 4 moves from the head of the hopper 1 to the tail, the side surface of the rotating plate 27 separates from the inner wall of the head of the hopper 1. The third torsion spring 28 provides power to make the rotating plate 27 rotate by ninety degrees, and the top sealing plate 31 separates from the sliding strip 5. The spring shaft 29 elongates, making the length of the spring shaft 29 greater than the height of the cover 22 to ensure that the scraping cover plate 30 can clean the entire inner side wall of the cover 22. When the side scraping frame 4 moves to the tail of the hopper 1, the scraping cover plate 30 contacts the cover 22 in an open state to remove the materials on the inner side surface of the cover 22. When the side scraping frame 4 moves back to the head of the hopper 1, the arc surface at the upper part of the rotating plate 27 first contacts the inner wall of the head of the hopper 1, driving the rotating plate 27 to rotate reversely. Finally, the inner wall of the head of the hopper 1 transitions to contact the side surface of the rotating plate 27, and the top sealing plate 31 contacts the sliding strip 5, compressing the spring shaft 29. The top sealing plate 31 re-blocks the opening of the unlocking cavity 402 to prevent materials from entering the unlocking cavity 402.

[0043] Working principle: When the hopper 1 is transporting materials, the hydraulic cylinder 11 is in a contracted state, the hopper 1 is in a horizontal state, the blocking frame 25 contacts the side surface of the closing block 24, causing the closing block 24 and the cover 22 to maintain a vertical state, that is, the cover 22 blocks the tail opening of the hopper 1, preventing materials from slipping out of the tail opening of the hopper 1. At the same time, the side scraping frame 4 is located at the head of the hopper 1, the locking bar 18 is inserted into the locking hole 1301, preventing the swing rod 13 from rotating on the first pivot pin 12, the swing rod 13 and the bracket of the side scraping frame 4 are in a coplanar state, and the first torsion spring 14 is in a torsional energy storage state. The top sealing plate 31 contacts the sliding bar 5, and the top sealing plate 31 blocks the opening of the unlocking cavity 402, preventing materials from entering the unlocking cavity 402. The spring shaft 29 is in a compressed state, the side surface of the rotating plate 27 contacts the inner wall of the head of the hopper 1, and the third torsion spring 28 is in an energy storage state. The scraping cover plate 30 is located between the two brackets of the side scraping frame 4, and the scraping cover plate 30 and the side scraping frame 4 are in a coplanar state.

[0044] When the hopper 1 rotates for discharging materials on the bottom frame 10, the closing block 24 is separated from the blocking frame 25, the second torsion spring 23 provides a torsional force to drive the cover 22 to rotate by ninety degrees, the cover 22 contacts the stop block 26, and the cover 22 is completely separated from the materials, enabling rapid discharging.

[0045] To clean the materials adhering to the inner wall of the hopper 1, start the motor 8. The motor 8 drives the second bevel gear 7 to rotate, transmits power through the first bevel gear 6, causes a screw 3 to rotate, and then transmits power through the synchronous mechanism 9 to make the other screw 3 rotate synchronously. The two screws 3 simultaneously drive the side scraping frame 4 to move horizontally. When the side scraping frame 4 moves from the head to the tail of the hopper 1, the two brackets of the side scraping frame 4 clean the inner side wall of the hopper 1, and the scraping bottom plate 17 cleans the inner bottom surface of the hopper 1; at the same time, the side surface of the rotating plate 27 is separated from the inner wall of the head of the hopper 1, the third torsion spring 28 provides power to make the rotating plate 27 rotate by ninety degrees, and the top sealing plate 31 is separated from the sliding bar 5, the top sealing plate 31 is separated from the unlocking cavity 402, exposing the unlocking cavity 402, and the spring shaft 29 extends, making the length of the spring shaft 29 greater than the height of the cover 22, ensuring that the scraping cover plate 30 can clean the entire inner side wall of the cover 22.

[0046] When the side scraping frame 4 moves to the tail of the hopper 1, the wedge block 20 is inserted into the unlocking cavity 402, and the inclined surface of the wedge block 20 contacts the unlocking platform 1801, driving the unlocking platform 1801 to move, the spring 19 compresses, the locking bar 18 contracts into the locking cavity 401, and the locking bar 18 is separated from the locking hole 1301. The first torsion spring 14 provides power to drive the swing rod 13 to rotate. After the stop platform 16 on the swing rod 13 contacts the limit bar 15, the swing rod 13 stops rotating. At this time, the scraping bottom plate 17 is no longer in contact with the inner bottom surface of the hopper 1. At the same time, the scraping cover plate 30 contacts the cover 22 in an open state, removing the materials on the inner side surface of the cover 22.

[0047] When the side scraping frame 4 moves from the tail to the head of the carriage 1 again, the wedge block 20 separates from the unlocking platform 1801, and the spring 19 provides elastic force, causing the end inclined surface of the locking bar 18 to move outside the locking cavity 401 again. At this time, the locking bar 18 is not in the locking hole 1301. During this process, the scraping bottom plate 17 does not clean the inner bottom surface of the carriage 1 to prevent the materials in the carriage 1 from being pushed back to the head of the carriage 1.

[0048] When the side scraping frame 4 moves back to the head of the carriage 1, the upper end of the swing rod 13 begins to contact the inner wall of the head of the carriage 1, driving the swing rod 13 to rotate in the reverse direction, and the first torsion spring 14 begins to store energy, so that the swing rod 13 and the side scraping frame 4 are in a coplanar rotation again. The scraping bottom plate 17 contacts the inner bottom surface of the carriage 1 again. During this process, when the swing rod 13 passes through the inclined surface of the locking bar 18, it drives the locking bar 18 to move into the locking cavity 401, and the spring 19 is compressed. When the locking hole 1301 coincides with the locking bar 18, the spring 19 provides elastic force to make the locking bar 18 re-insert into the locking hole 1301. At the same time, the arc surface on the upper part of the rotating plate 27 first contacts the inner wall of the head of the carriage 1, driving the rotating plate 27 to rotate in the reverse direction, and finally the inner wall of the head of the carriage 1 transitions to contact the side surface of the rotating plate 27, and the top sealing plate 31 contacts the sliding bar 5, compressing the spring shaft 29, and the top sealing plate 31 re-seals the opening of the unlocking cavity 402.

[0049] When the carriage 1 finishes discharging materials, the carriage 1 rotates back to the horizontal state in the bottom frame 10 again. During this process, the blocking frame 25 first contacts the upper arc surface of the closing block 24, so that the cover 22 rotates in the reverse direction on the second rotating pin 21, and finally the blocking frame 25 transitions to contact the side surface of the closing block 24, and the cover 22 re-seals the tail opening of the carriage 1.

[0050] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all covered by the protection scope of the present invention.

Claims

1. A dump truck body, characterized in that: It includes a car body (1). Auxiliary frames (2) are provided on the upper parts of both sides of the car body (1). A screw rod (3) is rotatably provided in the auxiliary frame (2). Two screw rods (3) are commonly threadedly connected with a side scraping frame (4) for cleaning the inside of the car body (1). Slide bars (5) are provided on the inner side walls of both sides of the car body (1). The side scraping frame (4) forms a sliding fit with the slide bars (5). One end of a screw rod (3) and located at the head of the car body (1) is connected with a first bevel gear (6). A second bevel gear (7) is meshed below the first bevel gear (6). The second bevel gear (7) is fixedly provided on the rotating shaft of a motor (8). The motor (8) is fixedly provided on the car body (1). A synchronizing mechanism (9) is provided between the two screw rods (3). Two transmission wheels of the synchronizing mechanism (9) are respectively installed on the two screw rods (3).

2. The dump truck body according to claim 1, characterized in that: The car body (1) is rotatably provided on a bottom frame (10). The bottom frame (10) is installed on the vehicle. A hydraulic cylinder (11) is provided between the car body (1) and the bottom frame (10). The bottom of the hydraulic cylinder (11) is rotatably provided on the car body (1). The end of the telescopic shaft of the bottom frame (10) is rotatably provided below the car body (1).

3. The dump truck body according to claim 2, characterized in that: On the inner side surfaces of the two brackets of the side scraping frame (4), a first rotating pin (12) is provided. Swing rods (13) are rotatably provided on the first rotating pins (12). A first torsion spring (14) is sleeved outside the first rotating pin (12). Two ends of the first torsion spring (14) are respectively connected with the swing rod (13) and the first rotating pin (12). A limiting strip (15) is provided at the end of the first rotating pin (12). A stop platform (16) for blocking the rotation of the limiting strip (15) is provided on the swing rod (13). The bottoms of the two swing rods (13) are commonly connected with a scraping bottom plate (17) for connecting the inner bottom surface of the car body (1).

4. The self-unloading vehicle body according to claim 3, characterized in that: Lock cavities (401) are provided in the two brackets of the side scraping frame (4). The openings of the lock cavities (401) face the central axis direction of the car body (1). The upper part of the lock cavity (401) is communicated with an unlocking cavity (402). The opening of the unlocking cavity (402) faces the tail direction of the car body (1). A lock bar (18) is slidably provided in the lock cavity (401). A spring (19) is connected between the inner wall of the lock cavity (401) and the lock bar (18). The lock bar (18) extends to the outside of the bracket of the side scraping frame (4) through the opening of the lock cavity (401). The end of the lock bar (18) is a bevel surface. A lock hole (1301) for cooperating with the lock bar (18) is provided above the rotation point of the swing rod (13).

5. A dump truck body according to claim 4, characterized in that: An unlocking platform (1801) is provided on the upper part of the lock bar (18). And the unlocking platform (1801) is located in the unlocking cavity (402). A wedge block (20) for inserting into the opening of the unlocking cavity (402) is provided at the tail of the car body (1). And the wedge block (20) is used to drive the unlocking platform (1801) to move.

6. The self-dumping vehicle body according to claim 5, wherein: On the outer side surface of the tails of the two auxiliary frames (2), there are second pivot pins (21). The two second pivot pins (21) are jointly and rotatably connected to a cover (22) for covering the opening at the tail of the truck bed (1). A second torsion spring (23) is sleeved on the second pivot pin (21). The two ends of the second torsion spring (23) are respectively connected to the second pivot pin (21) and the cover (22). On the upper parts of both sides of the cover (22), there are closing blocks (24). The upper part of the closing block (24) is an arc surface. On the side surface of the closing block (24), there is a retaining frame (25) for preventing the closing block (24) from rotating. The retaining frame (25) is fixedly arranged on the bottom frame (10). On the upper part of the auxiliary frame (2), there is a stop block (26) for preventing the cover (22) from rotating excessively.

7. The dump truck body according to claim 6, characterized in that: On the upper part of the side scraping frame (4), a rotating plate (27) is rotatably arranged. The upper part of the rotating plate (27) is an arc surface, and the side surface of the rotating plate (27) is in contact with the inner wall of the head of the truck bed (1). A third torsion spring (28) is connected between the side scraping frame (4) and the rotating plate (27). On the lower surface of the rotating plate (27), there are a plurality of spring shafts (29). Below the plurality of spring shafts (29), there is a scraping cover plate (30) jointly connected for cleaning the inner wall of the cover (22).

8. A dump truck body according to claim 7, characterized in that: On the lower surfaces of both ends of the scraping cover plate (30), there are top closing plates (31). The two top closing plates (31) are respectively in contact with the two sliding strips (5), and the top closing plate (31) is used to block the opening of the lock cavity (401).

Images