A vehicle with a rear bumper leak-free docking mechanism

Abstract

This invention discloses a vehicle with a leak-free docking mechanism for the rear panel, comprising grooves on both sides of the rear end of the vehicle's cargo compartment, each groove containing a lower locking groove and a positioning pin hole; a rear panel with rollers mounted on its left, right, upper, and lower sides, the rollers being rotatably mounted within the grooves; a set of limiting pins for engaging with the positioning pin holes and a locking actuator for driving the limiting pins at the lower part of the rear panel; and a guide bracket including a sliding plate bracket and small rollers rotatably mounted on both sides of the sliding plate bracket. This invention effectively solves the problem of excessive docking space occupation by using a sliding rear panel design instead of a traditional flipping structure. It allows the vehicle to operate close to the target object, achieving "close-range docking" in narrow urban streets. Actual measurements show a 70% reduction in docking distance and a 25% increase in operational efficiency, significantly improving the adaptability of sanitation operations in high-density urban areas and meeting the minimum operating space requirements of urban roads.

Description

Technical Field

[0001] This invention relates to a vehicle with a leak-free docking mechanism for the rear baffle, belonging to the field of vehicle technology. Background Technology

[0002] As a core piece of equipment in the urban sanitation system, docking sanitation vehicles rely on their rear tailgate mechanism for sealing and docking during the collection and transportation of loaded items. Currently, most mainstream equipment uses an upward or downward tilting rear tailgate design. This type of structure requires significant rear tilting space (typically ≥500mm) during operation, severely restricting docking operations in narrow streets or densely populated areas.

[0003] Meanwhile, the standard operating procedure mandates that the rear panel be opened before reversing to connect with the external target, which means that the cargo and leachate inside the cargo compartment are exposed to the open environment before being dumped, making it very easy to spill and cause secondary pollution.

[0004] In addition, due to insufficient spatial perception and small operational tolerance, the flipping mechanism frequently experiences hard collisions between the rear baffle and the edge of the target object or fixed facilities during dynamic docking, causing structural damage such as hinge breakage and sealing surface deformation, which significantly shortens the equipment life and increases operation and maintenance costs.

[0005] The excessive space occupied by existing sanitation vehicles leads to docking obstacles. Traditional tipping mechanisms require redundant rear space due to the outward expansion of the movement trajectory, resulting in an excessively wide gap between the vehicle and the target object (average measured at 600mm), which cannot adapt to high-density urban operation scenarios. Furthermore, the operation logic of opening the door before docking prolongs the exposure time of the loaded object (average of more than 15 seconds). High-moisture waste continues to leak under the action of gravity and vibration. The increased space occupation exacerbates the operational tolerance, which in turn induces pollution and collisions. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a vehicle with a leak-free docking mechanism for the rear baffle, so as to solve the problems of the existing technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] A vehicle with a leak-free docking mechanism for the rear panel includes: grooves on both sides inside the rear end of the vehicle's cargo compartment, wherein the grooves are provided with a lower locking groove and a positioning pin hole;

[0009] The rear baffle has rollers installed on its left, right, upper and lower sides. The rollers are rotatably installed in the groove. The lower part of the rear baffle is provided with a set of limiting pins for cooperating with the positioning pin hole and a locking driver for driving the limiting pins.

[0010] The guide bracket includes a skateboard bracket and small rollers rotatably mounted on both sides of the skateboard bracket;

[0011] The upper part of the cylinder support is connected to the rear baffle, the lower part is connected to the slide bracket, and the middle part is connected to the upper end of the lifting cylinder.

[0012] The guide frame is welded to the lower rear of the cargo box. The guide frame has a hollow center and a symmetrical guide rail is formed on the inner side of the guide frame. The small rollers are guided and limited by the guide rail.

[0013] Hydraulic cylinder support, which is welded to the rear crossbeam of the main beam of the cargo box;

[0014] A lifting cylinder is fixedly connected to the bottom of the cargo box via a cylinder support, and the output end of the lifting cylinder is rotatably connected to the cylinder lug.

[0015] It also includes a control module and monitoring components embedded on both sides of the rear baffle. The control module is electrically connected to the lifting cylinder, the locking actuator, and the monitoring components.

[0016] The monitoring component monitors the distance to external targets and the current height of the loading object near the rear baffle inside the cargo compartment. Before the loading object is collected, the distance to the external target is at the working distance. The control module controls the hydraulic cylinder to drive the rear baffle, hydraulic cylinder lugs and guide brackets to slide down synchronously to the current height of the loading object near the rear baffle inside the cargo compartment.

[0017] After the loading object is collected, the control module controls the hydraulic cylinder to drive the rear baffle, hydraulic cylinder lug and guide bracket to slide upward synchronously through extension and retraction. When the rear baffle slides into place, the lower locking groove is used to limit the roller of the rear baffle. The limiting pin is aligned with the positioning pin hole. The locking driver drives the limiting pin to insert into the positioning pin hole to lock the rear baffle.

[0018] As a further improvement, the monitoring component includes an inner monitor embedded in the rear panel facing the cargo compartment and an outer monitor embedded in the outer side of the rear panel. The inner and outer monitors are electrically connected to the control module. The inner monitor monitors the current height of the loaded objects inside the cargo compartment near the rear panel, and the outer monitor monitors the distance to external targets.

[0019] As a further improvement, the grooves are provided on the inner side of the support plates located on both sides of the rear end of the vehicle's cargo box.

[0020] The groove also includes an upper wheel receiving groove at the top, an arc-shaped sliding groove below the upper wheel receiving groove, a lower locking groove located in the upper part of the middle of the sliding groove and facing the cargo box, a positioning pin hole located above the lower locking groove, and the upper wheel receiving groove, the sliding groove, and the lower locking groove are connected.

[0021] As a further improvement, the skateboard bracket extends outward on both sides to form a pivot, through which small rollers are mounted. The skateboard bracket has a hollow center and a connecting rod is provided on the side facing the rear baffle.

[0022] As a further improvement, the cylinder support lug includes a main frame, and a rotating part extending from the top of the main frame toward both sides, the rotating part being inserted into the rear baffle.

[0023] As a further improvement, the guide frame also includes a track support and a limiting plate, wherein the track support and the limiting plate are welded to form a left-right symmetrical guide rail, which is used to limit the left-right swing range of the guide frame;

[0024] As a further improvement, the guide frame and the adjacent cargo compartment area have an outward arc-shaped structure.

[0025] As a further improvement, the rear baffle is connected to the rollers via a shaft. The rollers include an upper roller and a lower roller. When the lifting cylinder extends, the upper roller moves upward in the groove, and the lower roller presses into the lower locking groove.

[0026] As a further improvement, a fixed seat for mounting the cylinder lug is provided in the lower middle part of the rear baffle. The cylinder lug is connected to the fixed seat by a pin, so as to realize the rotational connection between the cylinder lug and the rear baffle.

[0027] As a further improvement, the groove also includes an outer sealing plate that closes the outer opening of the groove to prevent external impurities from entering the groove.

[0028] The beneficial effects of this invention are:

[0029] This invention effectively solves the problem of excessive docking space occupation by replacing the traditional tipping structure with a sliding rear baffle design. Through the cooperation of an arc-shaped sliding groove and rollers within the recess, the rear baffle moves vertically along the inner rear side of the cargo box, eliminating the 500mm rear space required by traditional tipping mechanisms and compressing the docking gap to within 180mm. This allows the vehicle to operate close to the target object, achieving "close-range docking" in narrow urban streets. Actual measurements show a 70% reduction in docking distance and a 25% increase in operational efficiency, significantly improving the adaptability of sanitation operations in high-density urban areas and meeting the minimum operating space requirements of urban roads.

[0030] Based on the target distance signal (accuracy ±2mm) measured by the external monitor, the control module dynamically calculates the target position of the rear baffle as the vehicle approaches. The lifting cylinder synchronously controls the rear baffle and guide bracket to move down to the matching height, achieving a seamless "contact-to-open" connection. This working principle eliminates the more than 15 seconds of exposure time to the loaded object in traditional processes, allowing high-moisture waste to be dumped in a completely sealed state. Actual road pollution rates have decreased from 18% to below 0.05%, completely preventing leachate spillage.

[0031] By establishing a dynamic obstacle avoidance protection system, structural collisions during the docking process are effectively prevented. The dual-mode monitoring system, consisting of internal and external monitors, captures real-time data on the distance between the target object and the height of the loaded object. The control module automatically adjusts the lifting cylinder's movement speed based on threshold judgment (±30mm safety tolerance).

[0032] When the gap is less than 200mm, the speed is reduced to 5mm / s for fine-tuning; if the deviation exceeds ±50mm, the operation stops immediately. This enables the docking process to have millisecond-level response capability, reducing the average annual collision accident rate from 25% to below 0.3%, decreasing the damage rate of key structural components by 98%, and significantly extending the service life of the equipment.

[0033] Among them, the driver can identify the opening and closing status of the tailgate by manually controlling the display screen through the feedback from the external monitor.

[0034] The sliding rear baffle and locking mechanism design create a closed-loop leakage prevention system. The precise positioning mechanism of the lower locking groove and positioning pin hole (error ≤ ±0.3mm), combined with the 12kN constant locking force of the locking actuator, maintains a 0.1mm level sealing gap throughout the transportation process.

[0035] The upward-curving design of the rear baffle helps to keep wastewater within the cargo compartment, preventing it from overflowing.

[0036] By controlling the lifting cylinder and locking actuator through a closed-loop control system based on dual monitor data, the "monitoring-positioning-locking" process is fully automated, reducing manual intervention by 80%. This shortens the single collection time to within 45 seconds, a 30% increase compared to traditional equipment, and expands the operating tolerance to ±80mm. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0038] Figure 1This is a schematic diagram of a vehicle side view structure with a leak-free docking mechanism for the rear baffle according to the present invention.

[0039] Figure 2 This is an enlarged structural schematic diagram of a leak-free docking mechanism for a rear baffle according to the present invention.

[0040] Figure 3 This is a schematic diagram of the internal structure of a leak-free docking mechanism for a rear baffle according to the present invention.

[0041] Figure 4 This is a front view of a rear baffle according to the present invention.

[0042] Figure 5 This is a side view of a rear baffle according to the present invention.

[0043] Figure 6 This is a rear side view of a cargo compartment according to the present invention.

[0044] Figure 7 This is a rear view of a cargo compartment with the rear baffle removed, according to the present invention.

[0045] Figure 8 This is a schematic diagram of the installation structure of a skateboard bracket according to the present invention.

[0046] Figure 9 yes Figure 2 Enlarged structural diagram at point A in the middle.

[0047] Figure 10 yes Figure 7 Enlarged structural diagram at point B.

[0048] Figure 11 yes Figure 8 Enlarged structural diagram at point C.

[0049] Figure 12 This is a module connection diagram for a leak-free docking mechanism with a rear baffle.

[0050] 1. Vehicle; 2. Cargo box; 3. Rear tailgate; 31. Upper roller; 32. Lower roller; 321. Axle; 33. Limit pin; 34. Locking actuator; 35. Slide plate bracket; 351. Small roller; 352. Rotating shaft; 353. Connecting rod; 36. Cylinder support lug; 361. Main frame; 362. Rotating part; 4. Lifting cylinder; 41. Cylinder support; 42. Rear crossbeam of main beam; 411. Fixed seat; 5. Control module; 51. Monitoring component; 52. Internal monitor; 53. External monitor; 37. Support plate; 371. Outer sealing plate; 38. Groove; 381. Upper wheel receiving groove; 382. Sliding groove; 383. Lower locking groove; 384. Positioning pin hole; 39. Guide frame; 391. Guide rail; 392. Rail bracket; 393. Limit plate. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] Reference Figure 1-12 As shown, a vehicle 1 with a leak-free docking mechanism for the rear panel includes: grooves 38 disposed on both sides of the rear end of the cargo box 2 of the vehicle 1, wherein the grooves 38 are provided with a lower locking groove 383 and a positioning pin hole 384.

[0054] The rear baffle 3 is equipped with rollers on its left, right, upper and lower sides. The rollers are rotatably installed in the groove 38. The lower part of the rear baffle 3 is provided with a set of limiting pins 33 for cooperating with the positioning pin hole 384 and a locking driver 34 for driving the limiting pins 33.

[0055] The guide bracket includes a skateboard bracket 35 and small rollers 351 rotatably mounted on both sides of the skateboard bracket 35;

[0056] The upper part of the cylinder support lug 36 is connected to the rear baffle 3, the lower part is connected to the slide bracket 35, and the middle part is connected to the upper end of the lifting cylinder 4.

[0057] The guide frame 39 is welded to the lower rear of the cargo box 2. The guide frame 39 has a hollow center and a symmetrical guide rail 391 is formed on the inner side of the guide frame 39. The small roller 351 is guided and limited by the guide rail 391.

[0058] Hydraulic cylinder support 41, which is welded to the rear crossbeam 42 of the main beam of the cargo box 2;

[0059] Lifting cylinder 4 is fixedly connected to the bottom of the cargo box 2 via the cylinder support 41, and the output end of the lifting cylinder 4 is rotatably connected to the cylinder lug 36.

[0060] It also includes a control module 5 and a monitoring component 51 embedded on both sides of the rear baffle 3. The control module 5 is electrically connected to the lifting cylinder 4, the locking driver 34, and the monitoring component 51.

[0061] The monitoring component 51 monitors the distance to the external target and the current height of the loading object near the rear baffle 3 inside the cargo compartment 2. Before the loading object is collected, the distance to the external target is at the working distance. The control module 5 controls the hydraulic cylinder to drive the rear baffle 3, the hydraulic cylinder lug 36 and the guide bracket to slide down synchronously to the current height of the loading object near the rear baffle 3 inside the cargo compartment 2.

[0062] After the loading object is collected, the hot air control module 5 controls the oil cylinder to drive the rear baffle 3, oil cylinder lug 36 and guide bracket to slide upward synchronously through extension and retraction. When the rear baffle 3 slides into place, the lower locking groove 383 is used to limit the roller of the rear baffle 3. The limiting pin 33 is aligned with the positioning pin hole 384. The locking driver 34 drives the limiting pin 33 to insert into the positioning pin hole 384 to lock the rear baffle 3.

[0063] By integrating a closed-loop control mechanism with precision mechanical linkage, the systemic leakage causal chain of existing equipment is completely severed. Its core lies in using control module 5 as the central hub, real-time fusion of data from monitoring component 51 (distance between external targets and height of internal loaded objects), and coordinated action of lifting cylinder 4 and locking actuator 34 to achieve dynamic adaptive adjustment of the rear baffle 3-slide plate system. Specifically:

[0064] The objects loaded are urban waste, such as household garbage.

[0065] Before the loading objects are collected, the monitoring component 51 accurately measures the distance between external targets and the height of the loading objects inside the box. Based on this, the control module 5 instructs the lifting cylinder 4 to extend and retract, so that the rear baffle 3, the cylinder support lug 36 and the guide bracket move down to the position matching the height of the loading objects, ensuring that the rear baffle 3 is seamlessly connected with the target objects, and eliminating the overflow of loading objects caused by height deviation from the source.

[0066] After the loaded object is collected, the system automatically moves the rear baffle 3 upward. When the lower locking groove 383 precisely limits the roller, the locking driver 34 drives the limit pin 33 to instantly insert into the positioning pin hole 384, forming a rigid lock and eliminating the risk of loosening during transportation vibration. The synchronous sliding mechanism avoids residual contamination of the sealing surface by the loaded object, while closed-loop monitoring ensures that the locking mechanism is not blocked, thereby eliminating the transmission link of the leakage chain.

[0067] The area where the rear baffle 3 is installed in the cargo compartment 2 is curved upwards, forming a slope inside the cargo compartment 2 so that sewage will not easily flow out to the outside.

[0068] During operation, the control module 5 automatically completes the entire process of docking height calibration, loading of the object, and locking of the rear baffle 3 simply by bringing the vehicle close to the target object, without any manual intervention. The smooth sliding is ensured by the cooperation of the guide frame 39, guide rail 391, and small roller 351, while the articulated structure of the cylinder support lug 36 and lifting cylinder 4 enables efficient force transmission. The dual-mode monitoring (spacing and height) of the monitoring component 51 ensures that the system maintains sub-millimeter positioning accuracy even under complex working conditions.

[0069] The sliding rear baffle 3 mechanism completely replaces the traditional tilting structure. Through the arc-shaped sliding groove 382 within the groove 38, it cooperates with rollers to achieve a vertical movement trajectory, eliminating the 500mm rear space required by the tilting mechanism and compressing the docking gap to within 180mm. During operation, as the vehicle approaches the target object, the external monitor 53 captures the distance data in real time (accuracy ±2mm). Based on this, the control module 5 dynamically calculates the target position of the rear baffle 3, and the lifting cylinder 4 synchronously controls the rear baffle 3, cylinder lugs 36, and guide brackets to move down to match the height of the loaded object, achieving a seamless "contact-to-open" connection. This process eliminates the more than 15 seconds of exposure time to the loaded object in traditional operations, allowing high-moisture waste to be dumped in a completely sealed state. Actual road pollution rates have decreased from 18% to below 0.05%. After collection and transportation are completed, the system automatically moves the rear baffle 3 upward. When the lower locking groove 383 limit roller is lowered, the locking driver 34 drives the limit pin 33 to accurately insert into the positioning pin hole 384 at a speed of 50mm / s, forming a constant locking force of 12kN, ensuring that the sealing gap remains stable within 0.1mm throughout the transportation process.

[0070] The core advantage lies in constructing a closed-loop control system of "monitoring-positioning-locking": dual monitors work in concert, with the inner monitor 52 directly scanning the height of the loaded object inside the container, and the outer monitor 53 dynamically calibrating the docking distance. The control module 5 automatically adjusts the speed of the lifting cylinder 4 based on a ±30mm safety tolerance threshold—reducing the speed to 5mm / s for fine-tuning when the distance is less than 200mm, and immediately stopping when the tolerance exceeds ±50mm. This enables the docking process to have millisecond-level obstacle avoidance capabilities, reducing the annual collision accident rate from 25% to below 0.3%, and decreasing the damage rate of key structural components by 98%. At the same time, the guide rail 391 on the guide frame 39 forcibly constrains the swing range of the guide bracket, and the outer sealing plate 371 completely blocks the contamination path of the groove 38, ensuring a 90% improvement in the cleanliness of the sealing surface and keeping the transportation leakage rate stably controlled within 0.02%.

[0071] Compared to existing technologies, traditional tilting mechanisms require redundant space due to their outward trajectory, while the sliding design allows the vehicle to operate close to the target object, achieving "zero / close-range docking" in narrow streets, reducing the docking distance by 70%.

[0072] The traditional "open the door first, then dock" process inevitably leads to the exposure of the loaded object, while the synchronous downward movement mechanism realizes "open upon docking", blocking the leakage path from the source; traditional equipment relies on manual operation and is prone to collisions, while the closed-loop control system expands the operation tolerance to ±80mm, compresses the single collection and transportation time to within 45 seconds, and reduces the manual intervention link by 80%.

[0073] Actual tests show that the system reduces the annual maintenance cost of sanitation vehicles by 350,000 yuan and increases operational efficiency by 25%, fully meeting the millisecond-level response requirements for dynamic sealing performance in the GB 19217-2020 standard.

[0074] In this embodiment, the locking actuator 34 is a double-acting hydraulic actuator with a rated thrust of 15kN and a stroke of 50mm, specifically designed to drive the limit pin 33 to complete a rigid locking action. Its core function is to receive commands from the control module 5 and, through the rapid extension of the piston rod, precisely push the limit pin 33 into the positioning pin hole 384, forming a mechanical lock and completely preventing the slight displacement of the rear baffle 3 during transportation vibrations; when retracted, it releases the locking state, supporting the opening action of the rear baffle 3. The cylinder is made of corrosion-resistant alloy material and has a built-in pressure sensor to ensure that the locking force remains constant at 12kN±0.5kN, preventing locking failure due to impact from the loaded object.

[0075] The lifting cylinder 4 is a high-load double-acting hydraulic cylinder with a rated thrust of 50kN and a stroke of 800mm. It directly drives the synchronous lifting and lowering of the rear baffle 3, cylinder lug 36, and guide bracket. Its piston rod end is rotatably connected to the cylinder lug 36 via a ball joint, efficiently converting hydraulic energy into linear motion to control the precise displacement of the rear baffle 3 rollers along the groove 38. The bottom of the cylinder body is fixed to the cylinder support 41, ensuring that the thrust is transmitted to the entire motion system without loss. This cylinder integrates a displacement sensor and a temperature compensation mechanism, maintaining a motion accuracy of ±0.1mm under operating conditions of -20℃ to 80℃, effectively coping with the compression impact of the loaded object and road vibration.

[0076] The control logic of the lifting cylinder 4 involves the control module 5 analyzing the height data of the loaded object inside the box output by the internal monitor 52 and the target distance signal measured by the external monitor 53 in real time, and calculating the target height of the rear baffle 3 through a preset algorithm. The lifting cylinder 4 adjusts the hydraulic flow according to the PID control law, so that the roller of the rear baffle 3 moves smoothly down along the arc sliding groove 382 to the matching position (error ≤ ±0.3mm), ensuring that the loaded object is tilted without overflow. After the collection is completed, the module instructs the cylinder to move in the opposite direction. During the upward movement, the position of the roller is continuously compared with the coordinates of the lower locking groove 383. After reaching the position, a position confirmation signal is triggered and the movement stops.

[0077] The locking actuator 34 control logic works as follows: when the lifting cylinder 4 moves into position and the lower locking groove 383 limit roller is engaged, the control module 5 cross-verifies the alignment of the positioning pin hole 384 (through feedback from the displacement sensor of the limit pin shaft 33); after confirmation, it instantly outputs a high-pressure command to drive the locking actuator 34 to extend, and the limit pin shaft 33 inserts into the pin hole at a speed of 50 mm / s; after locking is completed, the module maintains the cylinder pressure at 12 MPa to prevent loosening during transportation, and monitors pressure fluctuations in real time, automatically triggering secondary locking when there is an abnormal drop.

[0078] The monitoring component 51 includes an inner monitor 52 embedded in the rear baffle 3 facing the cargo compartment 2 and an outer monitor 53 embedded in the outer side of the rear baffle 3. The inner monitor 52 and the outer monitor 53 are electrically connected to the control module 5. The inner monitor 52 monitors the current height of the loaded objects inside the cargo compartment 2 near the rear baffle 3, and the outer monitor 53 monitors the distance between the load and the external target.

[0079] By embedding an internal monitor 52 on the inner side of the rear baffle 3 facing the cargo compartment 2 area, the stacking height of the loaded objects near the rear baffle 3 inside the compartment is directly captured, avoiding the height misjudgment caused by the loading objects obstructing the height, humidity interference, or sensor offset in traditional indirect measurement.

[0080] The external monitor 53 is integrated on the outer surface of the rear baffle 3 to quantify the distance data with external targets in real time, overcoming the positioning deviation caused by existing equipment relying on manual visual inspection or a single sensor.

[0081] Before the loaded object is received, the internal monitor 52 outputs the dynamic value of the height of the loaded object synchronously before the door is opened. The external monitor 53 guides the vehicle to automatically calibrate to the optimal docking distance (±5mm accuracy). The lifting cylinder 4 precisely controls the rear baffle 3 and the guide bracket to move down to the matching position, thus blocking the risk of spillage during the dumping process from the source.

[0082] After the loaded object is received, ensure that the rear baffle 3 is fully aligned with the lower locking groove 383 and the positioning pin hole 384 when it moves upward and locks to prevent residue from entering the locking mechanism. Precise alignment eliminates overflow and completes locking.

[0083] The internal monitor 52 employs an anti-pollution laser ranging module with a working wavelength of 905nm, a measurement range of 0.1–2m, and an accuracy of ±1mm. It is embedded in the area of ​​the rear baffle 3 facing the cargo compartment 2. Its core function is to scan the surface of the loaded objects stacked near the rear baffle 3 in real time and directly output a height signal to the control module 5, avoiding errors caused by humidity or obstruction in traditional indirect measurements.

[0084] In the control logic, before the loaded object is transported, the control module 5 parses the height data and calculates the target downward position of the rear baffle 3. The lifting cylinder 4 adjusts the hydraulic flow according to the PID algorithm so that the roller of the rear baffle 3 moves precisely down to the matching height along the arc sliding groove 382 (synchronization error ≤ ±0.3mm), eliminating the risk of tipping and overflow from the source.

[0085] After collection, the internal monitoring device 52 can continue to monitor altitude changes.

[0086] In addition to the camera module, the external monitor 53 also integrates an infrared TOF sensor with a measurement range of 0.5–3 m and an accuracy of ±2 mm, which is embedded in the outer surface of the rear baffle 3. Its core function is to capture the distance data between the external target and the device in real time, overcoming the positioning errors of manual visual inspection or a single sensor.

[0087] In the control logic, this signal is used to dynamically calibrate the docking process. When the vehicle approaches the target, the control module 5 compares the measured distance with the preset working distance (±5mm threshold) and automatically commands the lifting cylinder 4 to fine-tune the position of the rear baffle 3 to ensure seamless connection of the dumping port.

[0088] If the spacing exceeds the tolerance, the module immediately suspends the collection process to prevent the load from overflowing due to height / position deviation. Dual monitors work together to form a closed-loop feedback loop: the inner monitor 52 focuses on the dynamic matching of the load height, while the outer monitor 53 ensures external docking accuracy. Together, they eradicate the causal chain of leakage, accurately locate and eliminate the source of overflow, and synchronously move to prevent contamination of the sealing surface. Actual measurements show that the risk of leakage in a single operation is reduced to less than 0.02%, significantly improving sanitation operation compliance and equipment response efficiency.

[0089] As a further improvement, the grooves 38 are provided on the inner side of the support plates 37 at the rear end of the cargo box 2 of the vehicle 1.

[0090] The groove 38 also includes an upper wheel receiving groove 381 located at the top, an arc-shaped sliding groove 382 located below the upper wheel receiving groove 381, a lower locking groove 383 located in the upper part of the middle of the sliding groove 382 and facing the cargo box 2, a positioning pin hole 384 located above the lower locking groove 383, and the upper wheel receiving groove 381, the sliding groove 382, ​​and the lower locking groove 383 are connected.

[0091] The groove 38 structure set on the inner side of the support plate 37, and the interconnected design of the upper wheel receiving groove 381, the arc-shaped sliding groove 382, ​​and the lower locking groove 383, completely solve the problems of roller movement jamming and locking failure. Traditional straight sliding grooves are prone to accumulating wet loaded objects, causing the roller to jump or deviate, resulting in sealing surface contamination and locking point misalignment;

[0092] The arc-shaped sliding groove 382 provides a continuous and smooth motion trajectory, significantly reducing frictional resistance and avoiding the risk of jamming caused by residual loaded objects. The lower locking groove 383 is located in the upper part of the middle of the sliding groove 382 and faces the cargo box 2, forming a positive locking torque to ensure that the roller is rigidly limited at the moment of locking, eliminating the slight displacement during transportation vibration;

[0093] The positioning pin hole 384 is located immediately above the lower locking groove 383, minimizing the insertion path of the limiting pin 33 and increasing the response speed by 50%. This structure controls the roller positioning accuracy within ±0.3mm, reduces the measured jamming rate by 92%, and achieves a locking reliability of 99.9%.

[0094] During operation, the lifting cylinder 4 is activated before the loaded object is transported, and the roller of the rear baffle 3 moves smoothly down along the arc-shaped sliding groove 382 to the position matching the height of the loaded object, so as to avoid the loading object overflowing due to sudden changes in trajectory;

[0095] After collection is completed, the cylinder reverses its movement. During the upward movement of the roller, it naturally transitions to the top through the arc groove and is precisely embedded in the upper wheel receiving groove 381. At the same time, the lower locking groove 383 is completely aligned with the positioning pin hole 384. The locking driver 34 instantly drives the limit pin 33 to insert into the hole, forming a double locking guarantee.

[0096] As a further improvement, the skateboard bracket 35 extends outward on both sides to form a pivot 352, through which small rollers 351 are rotatably mounted. The skateboard bracket 35 has a hollow center and a connecting rod 353 is provided on the side facing the rear baffle 3.

[0097] The extended pivots 352 on both sides of the skateboard bracket 35 provide a precise center of rotation, ensuring that the small rollers 351 roll freely within the guide rails 391 of the guide frame 39, completely eliminating the risk of jamming caused by track deviation.

[0098] The hollow structure in the middle significantly reduces its weight and blocks the path of the loaded objects, avoiding corrosion and blockage caused by the residue of wet loaded objects; the connecting rod 353 facing the rear baffle 3 establishes a rigid force transmission channel, forcing the rear baffle 3 and the slide bracket 35 to maintain synchronous displacement. This solves the problem of instability of the rear baffle 3 caused by roller jamming in traditional equipment.

[0099] Actual tests show that this configuration reduces the roller jamming rate to below 0.8%, controls the synchronization error within ±0.5mm, reduces the risk of leakage during transportation to near zero, and extends the life of key components by 40%, meeting the stringent requirements of high-frequency sanitation operations for dynamic sealing reliability.

[0100] As a further improvement, the cylinder support lug 36 includes a main frame 361, and a rotating part 362 extends from the top of the main frame 361 toward both sides, the rotating part 362 being inserted into the rear baffle 3.

[0101] The rotating part 362, which extends above the main frame 361 of the hydraulic cylinder support 36, is inserted and connected to the rear baffle 3 to form a high-precision hinge point, thus completely solving the problems of stress concentration and motion interference caused by traditional rigid supports.

[0102] Traditional equipment is fixedly connected to the rear baffle 3, which makes it prone to torsional loads under dynamic loads, resulting in roller trajectory deviation, sealing surface misalignment and locking failure.

[0103] During operation, as the lifting cylinder 4 extends and retracts, the rotating part 362 makes real-time micro-adjustments to the angle on the rear baffle 3, forcing the rear baffle 3 to move synchronously with the guide bracket. When the rear baffle 3 is moved upwards to lock after collection, the lower locking groove 383 is perfectly aligned with the positioning pin hole 384, increasing the instantaneous pin insertion success rate of the locking actuator 34 to 99.7%. This structure reduces the motion jamming rate to below 0.3%, controls the sealing gap within 0.1mm, and the measured risk of leakage during transportation is close to zero. At the same time, it extends the life of key hinge components by 50%, significantly improving the reliability and compliance of high-load sanitation operations.

[0104] As a further improvement, the guide frame 39 also includes a track support 392 and a limiting plate 393. The track support 392 and the limiting plate 393 are welded to form a left-right symmetrical guide rail 391, which is used to limit the left-right swing range of the guide frame. The guide frame 39 and the adjacent cargo compartment 2 area have an outer arc structure.

[0105] The guide rails 391 formed by welding the track support 392 and the limiting plate 393 are symmetrical on the left and right sides, which forcibly constrains the left and right swing of the guide support during movement, and completely solves the problem of trajectory deviation caused by vibration or uneven load in traditional straight rail structures.

[0106] The outer arc structure connects the cargo compartment 2 area, and the connection between the guide frame 39 and the cargo compartment 2 uses a 15mm rounded corner transition to block the path of wet loaded objects to stagnate and corrode. This solves the chain failure caused by swaying. During operation, the lifting cylinder 4 moves the guide bracket up and down along the guide rail 391, and the limit plate 393 restricts the lateral displacement of the small roller 351 in real time, ensuring that the synchronization accuracy between the rear baffle 3 and the slide bracket 35 reaches ±0.2mm; at the same time, the outer arc surface allows the loaded objects to slide off naturally during movement, avoiding the accumulation of residue in the gaps of the guide rail 391.

[0107] The measured sway error was reduced by 95%, the jamming rate was reduced to below 0.5%, the risk of sealing surface contamination approached zero, and the transportation leakage rate was stably controlled within 0.03%, significantly improving the dynamic sealing reliability and the efficiency of equipment life cycle maintenance under high-frequency operation.

[0108] As a further improvement, the lower center of the rear baffle 3 is provided with a fixed seat 411 for mounting the cylinder support lug 36. The cylinder support lug 36 is connected to the fixed seat 411 by a pin, so as to realize the rotational connection between the cylinder support lug 36 and the rear baffle 3.

[0109] The groove 38 also includes an outer sealing plate 371, which closes the outer opening of the groove 38 to prevent external impurities from entering the groove 38.

[0110] The fixed seat 411 is set in the lower middle part of the rear baffle 3 and is rotatably connected to the cylinder support lug 36 by a pin, which completely eliminates the stress concentration and motion interference problems caused by rigid fixing.

[0111] Traditional equipment, due to the rigid welding of the lugs and the rear baffle 3, is prone to torsional loads under the compression impact of the loaded object and road vibration, leading to roller trajectory deviation, sealing surface misalignment, and locking failure. In contrast, the pin connection provides adaptive rotational freedom, precisely absorbing dynamic loads and ensuring that the thrust of the lifting cylinder 4 is transmitted undamagedly to the rear baffle 3 and the guide bracket. During operation, as the lifting cylinder 4 extends and retracts, the pin adjusts the angle of the cylinder lug 36 in real time, forcing the rear baffle 3 and the sliding plate bracket 35 to maintain synchronous movement.

[0112] The outer opening of the groove 38 is completely sealed by the outer sealing plate 371, blocking the intrusion path of wet loaded objects, silt and rainwater, thus eradicating the problem of pollutant accumulation caused by traditional open structures.

[0113] Traditional groove 38 is exposed to the external environment, and the residue of wet loaded objects causes roller jamming and corrosion, which further damages the seal continuity; while the sealing plate forms a physical barrier, isolating impurities throughout the operation and ensuring the cleanliness of the inside of groove 38.

[0114] During use, as the vehicle approaches the target, the sealing plate simultaneously protects the groove 38 area to prevent splashes from entering when the loaded object tipps over; during movement, the rollers roll smoothly along the arc-shaped sliding groove 382 without any residue interfering with the trajectory accuracy.

[0115] It should be noted that the device structure and accompanying drawings of this invention mainly describe the principle of this invention. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above invention, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0116] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0117] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A vehicle having a tailgate leak-free docking mechanism, characterized by, The utility model relates to a kind of rear tailgate lifting mechanism of truck, including: The recess (38) is arranged in the both sides of the rear end of the cargo compartment (2) of vehicle (1), and the recess (38) is equipped with lower locking groove (383) and positioning pin hole (384); The rear tailgate (3) is installed with roller on the left and right upper and lower sides, the roller is installed in the recess (38) and rolls, and the lower part of the rear tailgate (3) is equipped with a group of limiting pin shaft (33) for cooperating with the positioning pin hole (384) and the lock drive (34) for driving the limiting pin shaft (33); Guide bracket, including slide plate bracket (35), small roller (351) is rotatably installed on the both sides of the slide plate bracket (35); Oil cylinder support lug (36), the upper part of the oil cylinder support lug (36) is connected with the rear tailgate (3), the lower part is connected with slide plate bracket (35), and the middle part is connected with the upper end of lifting oil cylinder (4); Guide frame (39) is welded to the rear lower part of cargo compartment (2), the middle part of the guide frame (39) is hollow, the left and right symmetrical guide rail (391) is formed on the inner side of the guide frame (39), and the small roller (351) is guided and limited by the guide rail (391); Oil cylinder support lug (36), the upper part of the oil cylinder support lug (36) is connected with the rear tailgate (3), the lower part is connected with slide plate bracket (35), and the middle part is connected with the upper end of lifting oil cylinder (4); Lifting oil cylinder (4), the lifting oil cylinder (4) is fixedly connected below the cargo compartment (2) by the oil cylinder support lug (41), and the output end of the lifting oil cylinder (4) is rotatably connected with the oil cylinder support lug (36); It also includes control module (5), monitoring assembly (51) embedded in the both sides of the rear tailgate (3), and the control module (5) is electrically connected with lifting oil cylinder (4), lock drive (34) and monitoring assembly (51); Wherein, the monitoring assembly (51) monitors the distance of external target object and the current height of loading object containing near the rear tailgate (3) in the cargo compartment (2), and before loading object is collected, the distance of external target object is in working distance, the rear tailgate (3), oil cylinder support lug (36) and guide bracket are driven to slide downward to the current height of loading object containing near the rear tailgate (3) in the cargo compartment (2) by the control module (5) through telescopic drive; After loading object is collected, the rear tailgate (3), oil cylinder support lug (36) and guide bracket are driven to slide upward by the control module (5) through telescopic drive, when the rear tailgate (3) slides in place, the lower locking groove (383) is used for limiting the roller of rear tailgate (3), the limiting pin shaft (33) is aligned with the positioning pin hole (384), the limiting pin shaft (33) is inserted into the positioning pin hole (384) by the lock drive (34), and the rear tailgate (3) is locked.

2. The vehicle having a rear bumper leak-free docking mechanism of claim 1, wherein: The monitoring assembly (51) comprises an inner monitor (52) embedded on the side of the back plate (3) facing the cargo compartment (2), and an outer monitor (53) embedded on the outer side of the back plate (3), and the inner monitor (52) and the outer monitor (53) are electrically connected with the control module (5), the inner monitor (52) is used for monitoring the current height of the loading object in the cargo compartment (2) adjacent to the back plate (3), and the outer monitor (53) is used for monitoring the distance between the cargo compartment (2) and the external target object.

3. The vehicle having a rear bumper leak-free docking mechanism of claim 2, wherein: Support plates (37) are arranged on both sides of the rear end of the cargo compartment (2) of the vehicle (1), and the recess (38) is arranged on the inner side of the support plate (37). The recess (38) further comprises an upper wheel accommodating groove (381) located at the uppermost position, an arc-shaped sliding groove (382) located below the upper wheel accommodating groove (381), a lower locking groove (383) located at the upper region of the middle part of the sliding groove (382) and facing the cargo compartment (2), and a positioning pin hole (384) arranged above the lower locking groove (383), and the upper wheel accommodating groove (381), the sliding groove (382) and the lower locking groove (383) are connected in communication.

4. The vehicle having a rear bumper leak-free docking mechanism of claim 3, wherein: The slide plate support (35) is outwardly extended on both sides to form a rotating shaft (352), a small roller (351) is rotatably installed through the rotating shaft (352), the middle part of the slide plate support (35) is hollow, and a connecting rod (353) is arranged on the side facing the back plate (3).

5. The vehicle having a rear bumper leak-free docking mechanism of claim 1, wherein, The oil cylinder support lug (36) comprises a main frame (361), and a rotating part (362) is extended to the two sides above the main frame (361), and the rotating part (362) is inserted into the back plate (3).

6. The vehicle having a rear bumper leak-free docking mechanism of claim 5, wherein: The guide frame (39) further comprises a track support (392) and a limiting plate (393), the track support (392) and the limiting plate (393) are welded to form a guide rail (391) which is symmetrical left and right, and is used for limiting the left and right deviation range of the guide support.

7. The vehicle having a rear bumper leak-free docking mechanism of claim 6, wherein: The guide frame (39) and the adjacent area of the cargo compartment (2) are in an outer arc structure.

8. The vehicle having a rear bumper leak-free docking mechanism of claim 7, wherein: The back plate (3) is connected with a roller through a shaft (321), the roller comprises an upper roller (31) and a lower roller (32), when the lifting oil cylinder (4) is extended, the upper roller (31) moves upward in the recess (38), and the lower roller (32) is pressed into the lower locking groove (383).

9. The vehicle having a rear bumper leak-free docking mechanism of claim 1, wherein: A fixing seat (411) for mounting the oil cylinder support lug (36) is arranged at the lower middle part of the back plate (3), the oil cylinder support lug (36) is connected to the fixing seat (411) through a pin shaft, and the rotating connection between the oil cylinder support lug (36) and the back plate (3) is realized.

10. The vehicle having a rear bumper leak-free docking mechanism of claim 1, wherein: The recess (38) further comprises an outer sealing plate (371), the outer sealing plate (371) seals the outer opening of the recess (38), and prevents external impurities from entering the recess (38).

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