Automatic method for cleaning the bottom of a dump body

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By installing unloading side curtains on both sides of the conveying mechanism of the dump truck, the problems of reduced volume and high center of gravity of the dump truck are solved, thus realizing full utilization of the internal space of the truck and improving safety.

CN122126169APending Publication Date: 2026-06-02WEIHAI SHUNFENG SPECIAL VEHICLE MFG CO LTD +1

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: WEIHAI SHUNFENG SPECIAL VEHICLE MFG CO LTD
Filing Date: 2026-03-20
Publication Date: 2026-06-02

AI Technical Summary

Technical Problem

Existing dump truck bodies, when using inclined side panels for material guiding, suffer from problems such as reduced volume, higher center of gravity, poor stability, and low safety.

Method used

The dump truck body is equipped with unloading side curtains on both sides of the conveying mechanism. During loading, the curtains fit against the floor and side panels of the truck body to increase the volume. During unloading, the unloading side curtains are straightened and guided into the conveying mechanism by the lifting device, and the residual materials are cleaned up.

Benefits of technology

Lowering the center of gravity of the car body without reducing volume improves stability and safety, makes full use of the interior space of the car body, and ensures that materials are unloaded cleanly.

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Figure CN122126169A_ABST

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Abstract

This invention relates to the field of dump truck technology, and more particularly to an automatic method for cleaning residual material from the bottom of a dump truck. The method includes a square truck body with a conveying mechanism located in the center of the bottom. Unloading side curtains are installed on both sides of the conveying mechanism within the truck body. The middle of each unloading side curtain is fixedly connected to a lifting beam horizontally arranged along the length of the truck body. The lifting beam is connected to a lifting device. During unloading, some material may remain at the right-angled area at the bottom of the truck body. When this is done, the lifting device is activated, causing the lifting beam to move upwards, straightening the unloading side curtains below the beam into an inclined position. The material remaining at the right-angled area at the bottom of the truck body is then guided into the conveying mechanism by the unloading side curtains, thus completely unloading the material inside the truck body. This invention, while increasing the truck body volume, can completely unload the material inside the truck body through the unloading side curtains, making full use of the internal space of the truck body. The overall height of the truck body is reduced, resulting in better stability and higher safety.

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Description

Technical Field

[0001] This invention relates to the field of dump truck technology, and in particular to an automatic method for cleaning up residual material at the bottom of a dump truck. Background Technology

[0002] Currently, bulk material dump trucks on the market generally use a conveyor mechanism located in the middle of the bottom of the truck body to transport materials backward during unloading. To concentrate the material inside the truck body onto the conveyor mechanism, there are two main structural forms for these truck bodies: one is exemplified by patent application CN209756894U, entitled "A Novel Conveying Mechanism Type Dump Truck Anti-Smashing and Anti-Heavy Pressure Device," which discloses a truck body structure that is wider at the top and narrower at the bottom, with the lower side panels inclined. While this structure effectively guides material to the conveyor mechanism, it results in a high center of gravity, instability at the bottom, and a tendency to tip over. One type of problem is the risk of rollover accidents and low safety. Another type is patent application CN106043075A, entitled "A Vehicle-Mounted Self-Unloading System," which discloses a cargo box structure. Although the overall cargo box adopts a square structure with equal width at the top and bottom, solving the problem of cargo box instability, it adds inclined guide plates on both sides inside the cargo box in order to guide materials to the conveying mechanism. This reduces the cargo box volume, and the space under the inclined guide plates cannot be used, resulting in a waste of space at the bottom of the cargo box. Under the same volume, the overall height of the cargo box can only be increased, which also leads to the problem of a high center of gravity. Currently, there is no good way to solve the above problems.

[0003] In summary, how to solve the aforementioned problems when using inclined side panels for material guiding in dump truck bodies has become a pressing technical challenge for the industry. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides an automatic cleaning method for the bottom residual material of a dump truck body, which solves the problems of reduced volume, high center of gravity, poor stability, and low safety caused by the use of inclined side plates for material guiding in previous dump truck bodies.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: An automatic cleaning method for residual material at the bottom of a dump truck body is disclosed. The dump truck body includes a square body with a conveying mechanism located in the middle of the bottom. Unloading side curtains are installed on both sides of the conveying mechanism within the body. The middle of the unloading side curtains is fixedly connected to a lifting beam horizontally arranged along the length of the body. The lifting beam is connected to a lifting device. During loading, the material flattens the unloading side curtains, making them fit against the bottom and side panels of the body. At this time, the right-angled areas at the bottom of the body on both sides of the conveying mechanism are also used to store material, thereby increasing the body volume and reducing the overall height and center of gravity of the body while maintaining the same volume. During unloading, after the conveying mechanism has unloaded the material from the upper part of the body, some material remains at the right-angled areas at the bottom of the body. The lifting device is then activated, causing the lifting beam to move upwards and straighten the unloading side curtains below the beams into an inclined state. The material remaining at the right-angled areas at the bottom of the body is then guided into the conveying mechanism by the unloading side curtains, thus cleaning the inside of the body.

[0006] The lifting device includes several steel wire ropes. The free end of each steel wire rope is fixedly connected to the lifting beam. The fixed end of each steel wire rope passes upward around a fixed pulley installed on the top of the side panel of the carriage and then downward to be fixedly connected to a winch installed on the bottom of the carriage floor. One end of the winch is connected to a winch motor.

[0007] Several horizontal supports are fixed to the bottom of the carriage floor. The horizontal supports have through holes, and the winch rod passes through the through holes on the horizontal supports for rotational support.

[0008] The bottom of the unloading side curtain is fixedly connected to the bottom plate of the carriage on the side of the conveying mechanism, and the top of the unloading side curtain is fixedly connected to the top of the carriage side plate.

[0009] An angle plate is fixed to the bottom plate of the carriage on the side of the conveying mechanism, and the bottom of the unloading side curtain is fixedly connected to the angle plate by several rivets.

[0010] The top of the unloading side curtain is fixedly connected to the side panel of the carriage, and the middle part of the unloading side curtain is fixedly connected to the lifting beam by several rivets.

[0011] The length of the unloading side curtain is the same as the length of the interior of the carriage.

[0012] The width of the unloading side curtain is not less than the sum of the height of the side panel of the carriage and the width of the carriage floor between the side panel of the carriage and the conveying mechanism.

[0013] The unloading side curtain is made of flexible material.

[0014] The conveying mechanism includes a conveyor belt, an auger, or a scraper.

[0015] The present invention adopts the above-described solution and has the following advantages: By installing unloading side curtains in the carriages on both sides of the conveying mechanism, during loading, the material can be flattened by the unloading side curtains to fit against the carriage floor and side panels. At this time, the right-angled bottom of the carriages on both sides of the conveying mechanism can also be used to store materials, thereby increasing the carriage volume. Under the same volume, the overall height of the carriage can be reduced, thus lowering the center of gravity of the carriage. During unloading, after the conveying mechanism has unloaded the material in the upper part of the carriage, some material will remain in the right-angled bottom of the carriage. At this time, the winch motor is started, and the winch motor drives the winch rod to rotate. The winch rod winds the fixed end of the wire rope. After the wire rope passes over the fixed pulley, its free end will drive the lifting beam to move upward, straightening the unloading side curtains below the lifting beam into an inclined state. The material remaining in the right-angled bottom of the carriage will be guided into the conveying mechanism under the action of the unloading side curtains, thereby unloading the material inside the carriage cleanly. This invention, while increasing the volume of the carriage, can completely unload the materials inside the carriage through the unloading side curtain, making full use of the interior space of the carriage, reducing the overall height of the carriage, improving the stability of the carriage, and enhancing safety. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention in its loaded state.

[0017] Figure 2 for Figure 1 A cross-sectional structural diagram.

[0018] Figure 3 This is a three-dimensional structural diagram of the unloading state of the present invention.

[0019] Figure 4 for Figure 3 A cross-sectional structural diagram.

[0020] Figure 5 This is a schematic diagram of the bottom structure of the present invention.

[0021] In the diagram, 1 is the carriage, 2 is the conveying mechanism, 3 is the unloading side curtain, 4 is the carriage floor, 5 is the carriage side plate, 6 is the lifting beam, 7 is the wire rope, 8 is the fixed pulley, 9 is the winch rod, 10 is the winch motor, 11 is the corner plate, and 12 is the cross brace. Detailed Implementation

[0022] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0023] like Figure 1-5As shown, an automatic cleaning method for bottom residual material of a dump truck body is provided. The dump truck body includes a square truck body 1. A conveying mechanism 2 is provided in the middle of the bottom of the truck body 1. Unloading side curtains 3 are respectively provided in the truck body 1 on both sides of the conveying mechanism 2. The middle part of the unloading side curtains 3 is fixedly connected to a lifting beam 6 that is horizontally arranged along the length of the truck body. The lifting beam 6 is connected to a lifting device. During loading, the material flattens the unloading side curtain 3 so that it fits against the bottom plate 4 and side plate 5 of the carriage. At this time, the right angle at the bottom of the carriage 1 on both sides of the conveying mechanism 2 is also used to store the material, thereby increasing the volume of the carriage and reducing the overall height of the carriage under the same volume, thus lowering the center of gravity of the carriage. During unloading, after the conveying mechanism 2 has unloaded the material in the upper part of the carriage 1, some material will remain at the right angle at the bottom of the carriage 1. At this time, the lifting device is activated, and the lifting device drives the lifting beam 6 to move upward, straightening the unloading side curtain 3 below the lifting beam 6 into an inclined state. The material remaining at the right angle at the bottom of the carriage 1 will be guided into the conveying mechanism 2 under the action of the unloading side curtain 3, thereby unloading the material inside the carriage 1 cleanly.

[0024] The lifting device includes several steel wire ropes 7. The free end of each steel wire rope 7 is fixedly connected to the lifting beam 6. The fixed end of the steel wire rope 7 passes upward around the fixed pulley 8 installed on the top of the side panel 5 of the carriage and then downward to be fixedly connected to the winch 9 installed on the bottom of the carriage floor 4. One end of the winch 9 is connected to the winch motor 10. This design can hide the winch 9 and the winch motor 10 at the bottom of the carriage floor 4, which can play a certain protective role. Of course, if the winch 9 and the winch motor 10 are directly installed on the top of the side panel 5 of the carriage and the steel wire rope 7 is directly wound, the lifting function of the lifting beam 6 can also be achieved, which is also within the scope of protection of this application.

[0025] Several cross braces 12 are fixed to the bottom of the carriage floor 4. The cross braces 12 have through holes, through which the winch rod 9 passes for rotational support. When the winch motor 10 is working, it can drive the winch rod 9 to rotate. The winch rod 9 winds around the fixed end of the wire rope 7. After the wire rope 7 passes over the fixed pulley 8, its free end will drive the lifting beam 6 to move upward, thereby realizing the lifting action of the lifting beam 6.

[0026] The bottom of the unloading side curtain 3 is fixedly connected to the carriage floor 4 on the side of the conveying mechanism 2, and the top of the unloading side curtain 3 is fixedly connected to the top of the carriage side panel 5.

[0027] An angle plate 11 is fixed on the carriage floor 4 on the side of the conveying mechanism 2. The bottom of the unloading side curtain 3 is fixedly connected to the angle plate 11 by several rivets. The angle plate 11 can fix the unloading side curtain 3 on the one hand, and prevent materials from entering the gap between the conveying mechanism 2 and the carriage floor 4 on the other hand.

[0028] The top of the unloading side curtain 3 is fixedly connected to the side panel 5 of the carriage, and the middle part of the unloading side curtain 5 is fixedly connected to the lifting beam 6 by several rivets.

[0029] The length of the unloading side curtain 3 is the same as the length of the interior of the carriage 1, which can ensure that the material remaining at the right angle at the bottom of the carriage 1 is cleaned up.

[0030] The width of the unloading side curtain 3 is not less than the sum of the height of the side panel 5 of the carriage and the width of the carriage floor 4 between the side panel 5 of the carriage and the conveying mechanism 2. With this design, the material can be pressed flat by the unloading side curtain 3 during loading so that it fits against the carriage floor 4 and the side panel 5 of the carriage to keep it flat.

[0031] The unloading side curtain 3 is made of flexible material, such as tarpaulin or other plastic materials.

[0032] The conveying mechanism 2 includes various forms such as conveyor belts, augers, or scrapers.

[0033] Working principle: During loading, the material loaded into the carriage 1 can flatten the unloading side curtain 3, so that it fits against the carriage floor 4 and carriage side panel 5 to keep it flat. At this time, the right angle at the bottom of the carriage 1 on both sides of the conveying mechanism 2 can also be used to store materials, thereby increasing the volume of the carriage. Under the same volume, the overall height of the carriage 1 can be reduced, thereby lowering the center of gravity of the carriage 1 and improving the stability and safety of the carriage 1. During unloading, after the conveying mechanism 2 has unloaded the material from the upper part of the carriage 1, some material will remain at the right angle at the bottom of the carriage 1. At this time, the winch motor 10 is started, which drives the winch rod 9 to rotate. The winch rod 9 winds around the fixed end of the wire rope 7. After the wire rope 7 passes over the fixed pulley 8, its free end will drive the lifting beam 6 to move upward, straightening the unloading side curtain 3 below the lifting beam 6 into an inclined state. The unloading side curtain 3 above the lifting beam 6 will then be in a natural hanging state. At this time, the material remaining at the right angle at the bottom of the carriage 1 will be guided into the conveying mechanism 2 under the action of the unloading side curtain 3, thus completely unloading the material inside the carriage 1. After unloading is completed, the winch motor 10 is turned off. Under its own gravity, the lifting beam 6 drives the free end of the wire rope 7 and the unloading side curtain 3 to move downward and reset for the next loading.

[0034] The above specific embodiments should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, any alternative improvements or modifications made to the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0035] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A method for automatically cleaning residual material from the bottom of a dump truck body, the dump truck body comprising a square body, wherein a conveying mechanism is provided in the middle of the bottom of the body, characterized in that: The carriages on both sides of the conveying mechanism are equipped with unloading side curtains. The middle of the unloading side curtains is fixedly connected to the lifting beams that are horizontally set along the length of the carriages. The lifting beams are connected to the lifting device. During loading, the material flattens the unloading side curtains so that they fit against the bottom and side panels of the carriages. At this time, the right-angled bottom of the carriages on both sides of the conveying mechanism is also used to store material, thereby increasing the volume of the carriages and reducing the overall height of the carriages under the same volume, thus lowering the center of gravity of the carriages. During unloading, after the conveying mechanism has unloaded the material in the upper part of the carriages, some material will remain at the right-angled bottom of the carriages. At this time, the lifting device is activated, and the lifting device drives the lifting beams to move upward, straightening the unloading side curtains below the lifting beams into an inclined state. The material remaining at the right-angled bottom of the carriages will be guided into the conveying mechanism by the action of the unloading side curtains, thereby unloading the material inside the carriages cleanly.

2. The automatic cleaning method for residual material at the bottom of a dump truck body according to claim 1, characterized in that: The lifting device includes several steel wire ropes. The free end of each steel wire rope is fixedly connected to the lifting beam. The fixed end of each steel wire rope passes upward around a fixed pulley installed on the top of the side panel of the carriage and then downward to be fixedly connected to a winch installed on the bottom of the carriage floor. One end of the winch is connected to a winch motor.

3. The automatic cleaning method for residual material at the bottom of a dump truck body according to claim 2, characterized in that: Several horizontal supports are fixed to the bottom of the carriage floor. The horizontal supports have through holes, and the winch rod passes through the through holes on the horizontal supports for rotational support.

4. The automatic cleaning method for residual material at the bottom of a dump truck body according to claim 1, characterized in that: The bottom of the unloading side curtain is fixedly connected to the bottom plate of the carriage on the side of the conveying mechanism, and the top of the unloading side curtain is fixedly connected to the top of the carriage side plate.

5. The automatic cleaning method for bottom residual material of a dump truck body according to claim 4, characterized in that: An angle plate is fixed to the bottom plate of the carriage on the side of the conveying mechanism, and the bottom of the unloading side curtain is fixedly connected to the angle plate by several rivets.

6. The automatic cleaning method for residual material at the bottom of a dump truck body according to claim 1, characterized in that: The top of the unloading side curtain is fixedly connected to the side panel of the carriage, and the middle part of the unloading side curtain is fixedly connected to the lifting beam by several rivets.

7. The automatic cleaning method for bottom residual material of a dump truck body according to claim 1, characterized in that: The length of the unloading side curtain is the same as the length of the interior of the carriage.

8. The automatic cleaning method for residual material at the bottom of a dump truck body according to claim 1, characterized in that: The width of the unloading side curtain is not less than the sum of the height of the side panel of the carriage and the width of the carriage floor between the side panel of the carriage and the conveying mechanism.

9. The method for automatically cleaning residual material at the bottom of a dump truck body according to claim 1, characterized in that: The unloading side curtain is made of flexible material.

10. The method for automatically cleaning residual material at the bottom of a dump truck body according to claim 1, characterized in that: The conveying mechanism includes a conveyor belt, an auger, or a scraper.