A kind of automatic locking type side edge fastening mechanism of side tipping dumper cargo compartment

Abstract

The application discloses a kind of side tipping dumper cargo compartment automatic locking type side fastening mechanism, belong to dumper cargo compartment technical field.The application includes cargo compartment bottom plate, the bottom of cargo compartment bottom plate is provided with positioning seat, side top frame and automatic locking frame, one end of limiting support rod is installed with toothed shaft with the lower end of side top frame, locking snap ring and limiting ring are arranged on automatic locking frame, and locking snap ring is used to lock toothed shaft.The application solves the problem that existing compartment door locking structure cannot adapt to locking work of different angles in actual use process, the toothed groove cooperation structure of toothed shaft and locking snap ring is used in the application, locking position can be adjusted between toothed groove according to actual working condition, can adapt to locking demand of different angles of cargo compartment as a whole, locking adaptability is strong, angle is adjustable, automatic locking frame is driven along fixed slide by third hydraulic cylinder, and automatic engagement and disengagement of locking snap ring and toothed shaft are realized.

Description

Technical Field

[0001] This invention relates to the field of dump truck cargo box technology, specifically to an automatic locking side fastening mechanism for a side-tipping dump truck cargo box. Background Technology

[0002] The cargo box is an important component of a dump truck. To prevent rollover accidents during unloading, the dump truck chassis must be equipped with a rigid limiting structure to prevent the cargo box from tipping over beyond a safe angle. Furthermore, the cargo box is usually equipped with a door locking system to ensure that the door is closed and locked when the vehicle is in normal driving, and automatically opens when tipping over to unload.

[0003] Chinese Patent Publication No. CN118528896A discloses a dump truck cargo box limiting and door locking system, including a chassis frame, cargo box, subframe, tipping shaft, integrated limiting bracket, pin one, chain mechanism assembly, rear guard, cargo box door, cargo box door claw, pin three, and pin four. The integrated limiting bracket is symmetrically fixed on the chassis frame and includes a front end face, a fork-shaped structure, and a lower end face. The lower end face has mounting holes. The rear guard is fixed to the integrated limiting bracket by bolts. The chain mechanism assembly is mounted on the mounting holes of the fork-shaped structure through pin one. The rear end of the chain mechanism assembly is connected to the cargo box door claw through pin three. The cargo box door claw is connected to the cargo box through pin four. The cargo box door claw can rotate freely around pin four.

[0004] The door locking structure of the above-mentioned patent cannot adapt to locking operations at different angles during actual use; therefore, it cannot meet the existing needs. In response, we propose an automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck, which solves the problem that the door locking structure mentioned in the background art cannot adapt to locking operations at different angles during actual use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck, comprising a cargo box floor plate, a positioning seat, a side top frame and an automatic locking frame provided at the bottom of the cargo box floor plate, a limiting support rod installed between the side top frame and the positioning seat, a toothed shaft installed at one end of the limiting support rod and the lower end of the side top frame, and the automatic locking frame being located below the toothed shaft; The automatic locking frame is equipped with a locking ring and a limiting ring. The locking ring is used to lock the toothed shaft. When the cargo box needs to be locked, the third hydraulic cylinder retracts, and the locking ring on the automatic locking frame is tightly engaged in the tooth groove of the toothed shaft, forming a circumferential lock on the toothed shaft, thereby firmly locking the cargo box and effectively preventing the cargo box from moving during driving. The automatic locking frame is provided with a locking ring and a limiting ring, and the locking ring is used to lock the toothed shaft; The automatic locking frame is equipped with a limiting frame, and the locking ring extends into the limiting frame and abuts against the interior of the automatic locking frame. Two detection blocks are installed between the two sides of the locking ring and the automatic locking frame, and compression springs and trigger sensors are installed at the lower ends of the two detection blocks. The trigger sensor is fixedly connected to the lower end of the compression spring, and the upper end of the compression spring is fixedly connected to the detection block. The detection block abuts against the sides of the locking ring and the limiting frame, respectively.

[0007] Preferably, cargo box side panels are installed on both sides of the cargo box floor, and a cargo box rear panel is installed at the rear end of the cargo box side panels. The cargo box rear panel is welded to the cargo box floor and cargo box side panels respectively through a steel frame.

[0008] Preferably, a self-unloading baffle is hinged to the bottom of the cargo box floor, and a leak-proof pad is provided between the self-unloading baffle and the cargo box floor.

[0009] Preferably, a protective partition is welded to the outside of the self-unloading baffle, the protective partition is used to seal the connection of the cargo box side panel, and a connecting frame is fixedly connected to both sides of the self-unloading baffle.

[0010] Preferably, a first hydraulic cylinder is installed on the outside of each of the two cargo box side panels. The piston rod of the first hydraulic cylinder is hinged to an adjusting arm. The lower end of the adjusting arm is hinged to an auxiliary arm. The auxiliary arm is hinged to the lower end of the connecting frame. One side of the connecting frame is rotatably connected to the outside of the cargo box side panel via a rotating shaft.

[0011] Preferably, one end of the positioning seat is provided with a fixing seat, and both the fixing seat and the positioning seat are connected to the dump truck body frame by fixing bolts.

[0012] Preferably, a second hydraulic cylinder is installed at the lower end of the side top frame. The second hydraulic cylinder is hinged to the fixed base, and a transmission lug is hinged to the piston rod at the upper end of the second hydraulic cylinder. The transmission lug is rotatably connected to the inside of the side top frame via a rotating shaft.

[0013] Preferably, one end of the limiting support rod is rotatably connected to the toothed shaft via a bearing, the toothed shaft is fixedly connected to one end of the side top frame, and the other end of the limiting support rod is hinged to the fixed seat. Through the cooperation of the side top frame, the automatic locking frame, and the toothed shaft, the hydraulic system is used to realize automatic control of locking and unlocking. The outer circumference of the toothed shaft is provided with multiple ring-shaped toothed grooves along the axial direction, and the ring-shaped toothed grooves are evenly distributed. The inner edge of the locking ring is provided with arc-shaped locking teeth that mesh with the ring-shaped toothed grooves. The compression spring always applies an elastic thrust to the detection block in the direction of the toothed shaft. The detection block is fixedly installed on the side of the floating seat. The trigger sensor is fixedly installed in the automatic locking frame and corresponds to the position of the detection block. The signal output terminal of the trigger sensor is used to electrically connect to the status display device in the cab.

[0014] Preferably, a fixed slide rod extends through both sides of the automatic locking frame, a fixed frame is fixedly connected to the upper end of the fixed slide rod, the fixed frame is fixedly connected to the dump truck body frame, the fixed frame is fixedly connected to the limiting ring, a third hydraulic cylinder is installed below the automatic locking frame, the third hydraulic cylinder is fixedly connected to the dump truck body frame, and an elastic damping bushing is embedded in the inner wall of the limiting ring. The inner diameter of the elastic damping bushing is smaller than the outer diameter of the toothed shaft optical shaft section, and it is used to provide radial damping force to the toothed shaft in the locked state.

[0015] Preferably, both ends of the automatic locking frame are fixedly connected to limit sleeves, which are slidably connected to the fixed slide rods. The lower end of the automatic locking frame is hinged to a movable frame, and the upper end of the third hydraulic cylinder is telescopically connected to a hydraulic cylinder piston rod. The upper end of the hydraulic cylinder piston rod is hinged to the middle of the movable frame. When unloading is required, the first hydraulic cylinder is adjusted, extending and driving the adjusting arm and auxiliary arm to move. The auxiliary arm drives the connecting frame and the side panel of the cargo box to flip, opening the side panel of the cargo box. Then, the third hydraulic cylinder is started, extending the piston rod and driving the movable frame to move the automatic locking frame. The locking ring disengages from the toothed groove of the toothed shaft, releasing the lock. The second hydraulic cylinder is started, and its piston rod drives the side top frame to flip outward around the hinge point of the fixed seat through the transmission ear. At the same time, the limit support rod constrains the flipping angle. The side top frame drives the side panel of the cargo box to open to the preset angle, completing the unloading preparation.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a toothed shaft and a locking ring with a toothed groove engagement structure. The locking position can be adjusted between the toothed grooves according to actual working conditions, adapting to different locking requirements of the cargo box at various angles. It offers strong locking adaptability and adjustable angle. A third hydraulic cylinder drives the automatic locking frame to rise and fall along a fixed slide bar, achieving automatic engagement and disengagement of the locking ring and the toothed shaft. The entire process can be remotely controlled from the cab, eliminating the need for manual operation. Automatic locking and unlocking ensures convenient operation and improved safety. The locking ring and toothed shaft engage and lock, with the auxiliary limiting effect of the limiting ring, effectively resisting vibration and impact loads during travel, ensuring a secure cargo box lock, eliminating the risk of accidental loosening, and eliminating the need for manual operation during unloading.

[0017] This invention integrates the automatic locking frame, limiting support rod, and toothed shaft between the side top frame and the positioning seat at the bottom of the cargo box floor. It makes full use of the limited space at the bottom of the cargo box, does not occupy additional installation space, requires minimal modification to the original structure of the vehicle, and is easy to upgrade on existing models. The structure is compact and has a high space utilization rate. In addition, the limiting support rod and the toothed shaft are rotatably connected by bearings, and the other end of the limiting support rod is hinged to the fixed seat, forming a mechanical limiting structure. This structure can provide physical limiting protection in the event of hydraulic system failure, preventing the cargo box from overturning or falling, and further improving the safety performance of the entire vehicle. Attached Figure Description

[0018] Figure 1 This is an isometric view of the front view of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is an axonometric view of the rear view of the present invention; Figure 4 This is an axonometric view of the invention from below; Figure 5 For the present invention Figure 4 Enlarged view of a portion of area A in the middle; Figure 6 This is an isometric view of the automatic locking frame and its linkage structure of the present invention from the front view. Figure 7 This is an axonometric view of the positioning seat of the present invention from the side. Figure 8 For the present invention Figure 6 Enlarged view of a section in area B; Figure 9 This is a diagram showing the internal structure of the automatic locking frame of the present invention.

[0019] In the diagram: 1. Side panel of cargo box; 2. Rear panel of cargo box; 3. Bottom panel of cargo box; 4. Self-unloading baffle; 5. Protective partition; 6. Connecting frame; 601. First hydraulic cylinder; 602. Auxiliary arm; 603. Adjusting arm; 7. Positioning seat; 701. Fixed seat; 8. Side top frame; 801. Second hydraulic cylinder; 802. Geared shaft; 803. Limiting support rod; 804. Transmission ear; 9. Automatic locking frame; 901. Third hydraulic cylinder; 902. Fixed slide rod; 903. Movable frame; 904. Hydraulic cylinder piston rod; 905. Fixed frame; 906. Locking ring; 907. Limiting ring; 908. Limiting sleeve; 909. Limiting frame; 910. Detection block; 911. Compression spring; 912. Trigger sensor. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] To address the issue that existing door locking mechanisms cannot adapt to locking operations at different angles during practical use, please refer to... Figures 1-7 This embodiment provides the following technical solution: This embodiment of an automatic locking side fastening mechanism for a side-tipping dump truck cargo box includes a cargo box floor plate 3. The bottom of the cargo box floor plate 3 is provided with a positioning seat 7, a side top frame 8, and an automatic locking frame 9. A limit support rod 803 is installed between the side top frame 8 and the positioning seat 7. A toothed shaft 802 is installed at one end of the limit support rod 803 and the lower end of the side top frame 8. The automatic locking frame 9 is located below the toothed shaft 802, and the opening of the locking ring 906 faces upward and is directly opposite the tooth groove of the toothed shaft 802. The automatic locking frame 9 is equipped with a locking ring 906 and a limiting ring 907. The locking ring 906 is used to lock the toothed shaft 802. The outer circumference of the toothed shaft 802 is provided with multiple rings of annular toothed grooves along the axial direction. The toothed grooves are evenly distributed. The inner edge of the locking ring 906 is provided with arc-shaped locking teeth that mesh with the annular toothed grooves. The cross-section of the arc-shaped locking teeth is trapezoidal to enhance meshing stability and reduce jamming. The limiting ring 907 is sleeved on the outside of the optical shaft section of the toothed shaft 802, and the inner diameter of the limiting ring 907 is larger than the outer diameter of the optical shaft section of the toothed shaft 802, forming a gap of 1 to 3 mm between them, which is used to provide radial buffer space in the locked state.

[0022] When the hydraulic system fails or the pipeline leaks, causing the automatic locking frame to fall unexpectedly, the mechanical multi-ring annular groove can still lock the toothed shaft 802 in the current position, preventing the cargo box from accidentally coming loose and providing double safety protection.

[0023] It achieves dual protection through hydraulic locking and mechanical locking, significantly improving safety and reliability.

[0024] The movable frame 903 has a linkage structure. The middle of the movable frame 903 is hinged to the piston rod 904 of the hydraulic cylinder, and the upper two side arms are respectively hinged to the lower ends of the two side walls of the automatic locking frame 9. When the third hydraulic cylinder 901 retracts, the piston rod 904 pulls the lower end of the movable frame 903 downward, and the upper two side arms of the movable frame 903 open outward and push the automatic locking frame 9 upward. Under the guidance of the limiting sleeve 908 and the fixed slide rod 902, the automatic locking frame 9 rises, so that the locking ring 906 is engaged in the toothed groove of the toothed shaft 802, thereby achieving locking.

[0025] When the cargo box needs to be locked, the third hydraulic cylinder 901 retracts, and the hydraulic cylinder piston rod 904 drives the automatic locking frame 9 to rise through the movable frame 903. The movable frame 903 is subjected to the force generated by the retraction of the hydraulic cylinder piston rod 904. The two support arms at the upper end of the movable frame 903 will cause the automatic locking frame 9 to rise. The locking ring 906 on the automatic locking frame 9 is tightly engaged in the tooth groove of the toothed shaft 802, forming a circumferential lock on the toothed shaft 802, thereby firmly locking the cargo box and effectively preventing the cargo box from moving during driving.

[0026] Please see Figure 6 , Figures 8-9 The automatic locking frame 9 is equipped with a locking ring 906 and a limit ring 907. The locking ring 906 is used to lock the toothed shaft 802. An automatic locking frame 9 is installed inside a limiting frame 909. A locking ring 906 extends into the limiting frame 909 and abuts against the inside of the automatic locking frame 9. Two detection blocks 910 are installed between the two sides of the locking ring 906 and the automatic locking frame 9. A compression spring 911 and a trigger sensor 912 are installed at the lower end of the two detection blocks 910. The trigger sensor 912 is fixedly connected to the lower end of the compression spring 911, and the upper end of the compression spring 911 is fixedly connected to the detection block 910. The detection block 910 abuts against the sides of the locking ring 906 and the limiting frame 909 respectively.

[0027] The vertical section of the side top frame 8 is used to abut against the inner wall of the cargo box side panel 1, and its horizontal section extends towards the cargo box bottom panel 3.

[0028] The two detection blocks 910 are made of metal to ensure effective sensing by the inductive proximity switch. The two detection blocks 910 move synchronously with the limit frame 909.

[0029] The two detection blocks 910 have their own guide structures, which, in conjunction with the compression spring 911, enable precise reciprocating motion and automatic reset.

[0030] The detection block 910 itself does not emit a signal. The detection block 910 is fixedly connected to the limiting frame 909. When the limiting frame 909 rises or falls under the action of the automatic locking frame 9, the detection block 910 also moves accordingly.

[0031] When the detection block 910 is compressed by the compression spring 911 to trigger the sensor 912, an electrical signal is generated. When the locking ring 906 is fully engaged with the toothed shaft 802, the detection block 910 also reaches the position that can trigger the sensor 912. After the sensor 912 is triggered, it sends a "locked" signal to the cab.

[0032] When the locking ring 906 is not engaged or becomes loose, the compression spring 911 is not under pressure, triggering the proximity switch signal of the sensor 912 to be interrupted, and the cab can then know that the "unlocked" state is being detected.

[0033] The trigger sensor 912 transmits the detection signal to the status display device in the driver's cab, allowing the driver to check the locking / unlocking status in real time and avoid safety accidents caused by inadequate locking. An alarm will be triggered promptly when an abnormal locking condition is detected.

[0034] By integrating sensor technology into the locking mechanism, intelligent monitoring of the locking status is achieved, thereby improving safety performance.

[0035] In fact, a second hydraulic cylinder 801 is installed at the lower end of the side top frame 8. The second hydraulic cylinder 801 is hinged to the fixed seat 701. The piston rod at the upper end of the second hydraulic cylinder 801 is hinged to a transmission ear 804. The transmission ear 804 is rotatably connected to the inside of the side top frame 8 through a rotating shaft.

[0036] Please see Figure 6 , Figures 8-9 The limiting support rod 803 and the toothed shaft 802 are connected at the end with a bearing mounting hole. A rolling bearing is embedded in the bearing mounting hole. The end of the toothed shaft 802 passes through the inner ring of the rolling bearing and is axially limited by a shaft elastic retaining ring, allowing the limiting support rod 803 to rotate freely relative to the toothed shaft 802. One end of the limiting support rod 803 is rotatably connected to the toothed shaft 802 through a bearing. The toothed shaft 802 is fixedly connected to one end of the side top frame 8. The other end of the limiting support rod 803 is hinged to the fixed seat 701. The outer circle of the toothed shaft 802... Multiple annular toothed grooves are arranged axially on the circumferential surface, with each annular toothed groove being equidistant from the others. The inner edge of the locking ring 906 is provided with arc-shaped locking teeth that mesh with the annular toothed grooves. The compression spring 911 always applies an elastic thrust to the detection block 910 in the direction of the toothed shaft 802. The detection block 910 is fixedly installed on the side of the floating seat. The trigger sensor 912 is fixedly installed in the automatic locking frame 9 and corresponds to the position of the detection block 910. The signal output terminal of the trigger sensor 912 is used to electrically connect to the status display device in the cab.

[0037] Specifically, through the toothed groove engagement structure between the toothed shaft 802 and the locking ring 906, the locking position can be adjusted between the toothed grooves according to the actual working conditions, which can adapt to the locking requirements of different angles of the cargo box. The locking adaptability is strong and the angle is adjustable. The third hydraulic cylinder 901 drives the automatic locking frame 9 to rise and fall along the fixed slide bar 902, realizing the automatic engagement and disengagement of the locking ring 906 and the toothed shaft 802. The whole process can be remotely controlled from the cab without manual operation. Automatic locking and unlocking is convenient to operate and improves safety. The toothed groove engagement and locking of the locking ring 906 and the toothed shaft 802, combined with the auxiliary limiting function of the limit ring 907, can effectively resist the vibration and impact load during the driving process, ensuring that the cargo box is firmly locked and eliminating the risk of accidental loosening. It achieves the goal of not requiring manual operation during the unloading process.

[0038] In this embodiment, cargo box side panels 1 are installed on both sides of the cargo box floor 3, and cargo box rear panel 2 is installed at the rear end of the cargo box side panel 1. The cargo box rear panel 2 is welded to the cargo box floor 3 and the cargo box side panel 1 respectively through a steel frame. A self-unloading baffle 4 is hinged to the bottom of the cargo box floor 3. A leak-proof gasket is provided between the self-unloading baffle 4 and the cargo box floor 3. A wear-resistant sealing strip is embedded in the lower edge of the self-unloading baffle 4. The leak-proof gasket is set between the contact surface of the self-unloading baffle 4 and the cargo box floor 3. The leak-proof gasket is detachably fixed to the edge of the cargo box floor 3 by pressure strips and screws, so as to facilitate replacement after wear.

[0039] One end of the positioning seat 7 is provided with a fixing seat 701. Both the fixing seat 701 and the positioning seat 7 are connected to the body frame of the dump truck by fixing bolts.

[0040] The positioning seat 7 has a frame-shaped steel tube structure. Its vertical surface is connected to the outside of the longitudinal beam of the dump truck body frame by fixing bolts. Its horizontal surface is fixedly connected to the upper surface of the fixing seat 701 by bolts. The fixing seat 701 is a frame-shaped welded part. Its interior is provided with pin mounting holes for hinged connection of the second hydraulic cylinder 801 and the limit support rod 803.

[0041] Among them, the self-unloading baffle 4 is welded to the outside of the protective partition 5, which is used to seal the connection of the cargo box side plate 1. Both sides of the self-unloading baffle 4 are fixedly connected to the connecting frame 6.

[0042] In addition, a first hydraulic cylinder 601 is installed on the outside of both cargo box side panels 1. The piston rod of the first hydraulic cylinder 601 is hinged to an adjusting arm 603. The lower end of the adjusting arm 603 is hinged to an auxiliary arm 602. The auxiliary arm 602 is hinged to the lower end of the connecting frame 6. One side of the connecting frame 6 is rotatably connected to the outside of the cargo box side panel 1 via a rotating shaft. When unloading is required, the first hydraulic cylinder 601 is adjusted and extended, which drives the adjusting arm 603 and the auxiliary arm 602 to move. The auxiliary arm 602 drives the connecting frame 6 and the side panel 1 of the cargo box to flip, and the side panel 1 of the cargo box opens. Then, the third hydraulic cylinder 901 is started, the piston rod 904 of the hydraulic cylinder is extended, the movable frame 903 drives the automatic locking frame 9 to move, and the locking ring 906 disengages from the tooth groove of the toothed shaft 802, releasing the lock. The second hydraulic cylinder 801 is started, and its piston rod drives the side top frame 8 to flip outward around the hinge point of the fixed seat 701 through the transmission ear 804. At the same time, the limiting support rod 803 constrains the flipping angle. The side top frame 8 drives the side panel 1 of the cargo box to open to the preset angle, completing the unloading preparation. When the toothed shaft 802 rotates with the side top frame 8 to the preset locking position, the third hydraulic cylinder 901 moves in the opposite direction, the hydraulic cylinder piston rod 904 retracts, the automatic locking frame 9 is lifted by hydraulic pressure, and the locking ring 906 re-engages into the corresponding tooth groove of the toothed shaft 802, realizing automatic reset locking. Through the cooperation of the side top frame 8, the automatic locking frame 9 and the toothed shaft 802, the hydraulic system is used to realize automatic control of locking and unlocking.

[0043] It should be noted that fixed slide rods 902 extend through both sides of the automatic locking frame 9. A fixed frame 905 is fixedly connected to the upper end of the fixed slide rod 902. The fixed frame 905 is fixedly connected to the body frame of the dump truck. The distance between the fixed frame 905 and the toothed shaft 802 is the maximum range of motion of the toothed shaft 802. During the side-tipping unloading process, the position of the toothed shaft 802 moves between the locking ring 906 and the limiting ring 907. The fixed frame 905 is fixedly connected to the limiting ring 907. A third hydraulic cylinder 901 is installed below the automatic locking frame 9. The third hydraulic cylinder 901 is fixedly connected to the body frame of the dump truck. An elastic damping bushing is embedded in the inner wall of the limiting ring 907. The inner diameter of the elastic damping bushing is smaller than the outer diameter of the optical shaft section of the toothed shaft 802. It is used to provide radial damping force to the toothed shaft 802 in the locked state.

[0044] In the locked state, the elastic damping bushing applies radial preload to the toothed shaft, effectively absorbing vibration energy during operation, reducing noise, and preventing fretting wear of the toothed shaft in the tooth groove clearance.

[0045] Applying damping and vibration reduction technology to the locking and limiting structure improves the NVH performance of the entire vehicle.

[0046] In the initial state, the automatic locking frame 9 is located directly below the toothed shaft 802, the locking ring 906 is separated from the tooth groove of the toothed shaft 802, and the side panel of the cargo box can be opened freely; After the locking ring 906 engages with the toothed groove of the toothed shaft 802, the oil circuit of the third hydraulic cylinder 901 maintains pressure through the hydraulic valve to prevent the automatic locking frame 9 from falling back unexpectedly due to pipeline leakage.

[0047] The third hydraulic cylinder 901 has a mounting base on its outer wall. The mounting base is fixedly connected to the crossbeam of the dump truck body frame by bolts. The oil inlet and oil return port of the third hydraulic cylinder 901 are connected to the solenoid directional valve in the cab through hydraulic lines. The control switch of the solenoid directional valve is located on the dashboard or control panel in the cab. The automatic locking frame 9 is also equipped with a proximity switch. The detection head of the proximity switch is set towards the toothed shaft 802 and is used to detect whether the locking ring 906 and the toothed shaft 802 are in a fully engaged locking state. The signal output terminal of the proximity switch is electrically connected to the dump truck's vehicle controller. Both ends of the automatic locking frame 9 are fixedly connected to limit sleeves 908, which are slidably connected to the fixed slide rod 902. The lower end of the automatic locking frame 9 is hinged to a movable frame 903. The upper end of the third hydraulic cylinder 901 is telescopically connected to a hydraulic cylinder piston rod 904, which is hinged to the middle of the movable frame 903. The sliding cooperation between the limit sleeves 908 and the fixed slide rod 902 ensures the linearity and stability of the lifting and lowering movement of the automatic locking frame 9, and ensures that the locking ring 906 can accurately engage with the teeth.

[0048] The fixed slide rod 902 is fitted with a dustproof corrugated tube. The upper end of the dustproof corrugated tube is sealed to the fixed frame 905, and the lower end of the dustproof corrugated tube is sealed to the upper end of the limiting sleeve 908. This is to prevent mud, water and dust from entering the sliding mating surface of the limiting sleeve 908 and the fixed slide rod 902.

[0049] Specifically, the automatic locking frame 9, the limiting support rod 803, and the toothed shaft 802 are integrated between the side top frame 8 and the positioning seat 7 at the bottom of the cargo box floor 3. This makes full use of the limited space at the bottom of the cargo box, does not occupy additional installation space, requires minimal modification to the original structure of the vehicle, and is easy to upgrade on existing models. The structure is compact and has a high space utilization rate. In addition, the limiting support rod 803 and the toothed shaft 802 are rotatably connected by bearings, and the other end of the limiting support rod 803 is hinged to the fixed seat 701, forming a mechanical limiting structure. This structure can provide physical limiting protection when the hydraulic system fails, preventing the cargo box from overturning or falling, and further improving the safety performance of the entire vehicle.

[0050] Working principle: When unloading is required, the first hydraulic cylinder 601 is adjusted, extending and driving the adjusting arm 603 and auxiliary arm 602 to move. The auxiliary arm 602 drives the connecting frame 6 and the cargo box side plate 1 to flip, opening the cargo box side plate 1. Then, the third hydraulic cylinder 901 is activated, extending the piston rod 904. The movable frame 903 drives the automatic locking frame 9 to move, and the locking ring 906 disengages from the toothed groove of the toothed shaft 802, releasing the lock. The second hydraulic cylinder 801 is activated, and its piston rod drives the side top frame through the transmission lug 804. The side frame 8 rotates outward around the hinge point of the fixed seat 701, while the limiting support rod 803 constrains the rotation angle. The side frame 8 drives the side panel 1 of the cargo box to open to the preset angle, completing the unloading preparation. When it is necessary to lock the cargo box, the third hydraulic cylinder 901 retracts, and the hydraulic cylinder piston rod 904 adjusts the movable frame 903 to push the automatic locking frame 9 upward. The locking ring 906 on the automatic locking frame 9 tightly engages in the tooth groove of the toothed shaft 802, forming a circumferential lock on the toothed shaft 802, thereby firmly locking the cargo box and effectively preventing the cargo box from shifting during driving. The entire process can be remotely controlled from inside the cab, requiring no manual operation. Automatic locking and unlocking ensures convenient operation and enhanced safety. The locking ring 906 engages with the toothed shaft 802, and the limiting ring 907 further assists in limiting the movement, effectively resisting vibrations and impact loads during driving. This ensures the cargo box is securely locked, eliminating the risk of accidental loosening and allowing for unloading without manual intervention. The automatic locking frame 9, limiting support rod 803, and toothed shaft 802 are integrated into the side of the bottom of the cargo box floor 3. The top frame 8 and the positioning seat 7 make full use of the limited space at the bottom of the cargo box, without occupying additional installation space. This requires minimal modification to the original structure of the vehicle, making it easy to upgrade existing models. The structure is compact and has a high space utilization rate. In addition, the limiting support rod 803 and the toothed shaft 802 are rotatably connected by bearings. At the same time, the other end of the limiting support rod 803 is hinged to the fixed seat 701, forming a mechanical limiting structure. This structure can provide physical limiting protection in the event of hydraulic system failure, preventing the cargo box from overturning or falling, and further improving the safety performance of the entire vehicle.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A side-locking mechanism for the cargo box of a side-tipping dump truck, comprising a cargo box floor plate (3), characterized in that, The bottom of the cargo box floor (3) is provided with a positioning seat (7), a side top frame (8) and an automatic locking frame (9). A limit support rod (803) is installed between the side top frame (8) and the positioning seat (7). A toothed shaft (802) is installed at one end of the limit support rod (803) and the lower end of the side top frame (8). The automatic locking frame (9) is located below the toothed shaft (802). The automatic locking frame (9) is provided with a locking ring (906) and a limiting ring (907), and the locking ring (906) is used to lock the toothed shaft (802). The automatic locking frame (9) is equipped with a limiting frame (909), and the locking ring (906) extends into the limiting frame (909) and abuts against the interior of the automatic locking frame (9). Two detection blocks (910) are installed between the two sides of the locking ring (906) and the automatic locking frame (9). A compression spring (911) and a trigger sensor (912) are installed at the lower ends of the two detection blocks (910). The trigger sensor (912) is fixedly connected to the lower end of the compression spring (911), the upper end of the compression spring (911) is fixedly connected to the detection block (910), and the detection block (910) abuts against the sides of the locking ring (906) and the limiting frame (909) respectively.

2. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 1, characterized in that, Cargo box side panels (1) are installed on both sides of the cargo box floor plate (3), and cargo box rear panel (2) is installed at the rear end of the cargo box side panel (1). The cargo box rear panel (2) is welded to the cargo box floor plate (3) and the cargo box side panel (1) respectively by steel frame welding.

3. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 2, characterized in that, The bottom of the cargo box floor (3) is hinged to a self-unloading baffle (4), and a leak-proof pad is provided between the self-unloading baffle (4) and the cargo box floor (3).

4. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 3, characterized in that, The self-unloading baffle (4) is welded to the outside of a protective partition (5), which is used to seal the connection of the cargo box side panel (1). Both sides of the self-unloading baffle (4) are fixedly connected to a connecting frame (6).

5. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 4, characterized in that, A first hydraulic cylinder (601) is installed on the outside of each of the two cargo box side panels (1). The piston rod of the first hydraulic cylinder (601) is hinged to an adjusting arm (603). The lower end of the adjusting arm (603) is hinged to an auxiliary arm (602). The auxiliary arm (602) is hinged to the lower end of the connecting frame (6). One side of the connecting frame (6) is rotatably connected to the cargo box side panel (1) via a rotating shaft.

6. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 1, characterized in that, One end of the positioning seat (7) is provided with a fixing seat (701), and both the fixing seat (701) and the positioning seat (7) are connected to the dump truck body frame by fixing bolts.

7. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 6, characterized in that, The lower end of the side top frame (8) is equipped with a second hydraulic cylinder (801), which is hinged to the fixed seat (701). The piston rod at the upper end of the second hydraulic cylinder (801) is hinged to a transmission ear (804), which is rotatably connected to the inside of the side top frame (8) via a rotating shaft.

8. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 7, characterized in that, One end of the limiting support rod (803) is rotatably connected to the toothed shaft (802) via a bearing. The toothed shaft (802) is fixedly connected to one end of the side top frame (8). The other end of the limiting support rod (803) is hinged to the fixed seat (701). Multiple annular toothed grooves are provided axially on the outer circumferential surface of the toothed shaft (802). The annular toothed grooves are equidistantly distributed. The inner edge of the locking ring (906) is provided with arc-shaped locking teeth that mesh with the annular toothed grooves. The compression spring (911) always applies an elastic thrust to the detection block (910) in the direction of the toothed shaft (802). The detection block (910) is fixedly installed on the side of the floating seat. The trigger sensor (912) is fixedly installed in the automatic locking frame (9) and corresponds to the position of the detection block (910). The signal output end of the trigger sensor (912) is used to electrically connect to the status display device in the cab.

9. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 1, characterized in that, Both sides of the automatic locking frame (9) are connected by fixed slide rods (902). The upper end of the fixed slide rod (902) is fixedly connected to a fixed frame (905). The fixed frame (905) is fixedly connected to the dump truck body frame. The fixed frame (905) is fixedly connected to a limiting ring (907). A third hydraulic cylinder (901) is installed below the automatic locking frame (9). The third hydraulic cylinder (901) is fixedly connected to the dump truck body frame. An elastic damping bushing is embedded in the inner wall of the limiting ring (907). The inner diameter of the elastic damping bushing is smaller than the outer diameter of the optical shaft section of the toothed shaft (802). It is used to provide radial damping force to the toothed shaft (802) in the locked state.

10. The automatic locking side fastening mechanism for the cargo box of a side-tipping dump truck according to claim 9, characterized in that, Both ends of the automatic locking frame (9) are fixedly connected to limit sleeves (908), the limit sleeves (908) are slidably connected to the fixed slide rod (902), the lower end of the automatic locking frame (9) is hinged to a movable frame (903), the upper end of the third hydraulic cylinder (901) is telescopically connected to a hydraulic cylinder piston rod (904), and the upper end of the hydraulic cylinder piston rod (904) is hinged to the middle of the movable frame (903).

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