Garbage truck tail door mechanism and garbage truck thereof

Abstract

The tail door mechanism comprises a box body and a tail door, a driving structure used for driving the tail door to turn over is arranged on the box body, a sealing structure is arranged on a rear enclosure frame of the box body and / or a tail door frame of the tail door, and a sliding structure capable of moving and adjusting in the longitudinal direction of the garbage truck is arranged at the top of the box body. The sliding structure is hinged to the top of the tail door. In the closing and descending process of the tail door of the garbage truck, after the tail door sealing strip is in contact with the rear enclosure frame of the garbage truck, the tail door sliding shaft mechanism which is specially designed can enable the tail door to pull the tail door sliding shaft to automatically slide outwards for a certain distance, the rotating center of the tail door moves outwards, the tail door continuously descends at the moment, the sealing strip does not need to be compressed, and the tail door can smoothly descend and be closed; the problem of unnecessary extrusion on a sealing strip in the tail door closing process can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of garbage truck technology, and in particular to a garbage truck tailgate mechanism and the garbage truck thereof. Background Technology

[0002] Most garbage truck tailgates on the market currently open and close by rotating around a fixed point at the top of the rear of the garbage container. For example, patent CN222330623U discloses a tailgate locking device in which the upper part of the tailgate is hinged to the rear top of the container via a pin. Only a few vehicles have a tailgate rotation point that can be manually fine-tuned and cannot be adaptively adjusted. The tailgate locking point is usually located at the bottom or lower sides of the tailgate.

[0003] Because of the relative movement between the garbage bin and the tailgate, a sealing strip needs to be installed between the rear frame of the garbage bin and the tailgate frame to prevent sewage leakage when the tailgate is closed. This sealing strip is typically installed on the tailgate frame. To ensure a good seal, the height of the sealing strip needs to be greater than the pre-reserved gap between the tailgate frame and the rear frame of the garbage bin. When the tailgate rotates downwards from the open position to close, the sealing strip at the top of the tailgate first contacts the rear frame of the garbage bin and is then partially compressed. Next, the upper middle part of the sealing strip is compressed further. At this point, the tailgate's own weight cannot overcome the resistance of the sealing strip and it continues to descend. To ensure the tailgate closes completely, a locking mechanism needs to be added at the bottom of the garbage bin to hook and pull the tailgate towards the bin. Since the position of the tailgate's rotation axis at the top of the garbage bin is fixed, it is difficult to ensure that the rear frame of the garbage bin and the tailgate frame are relatively parallel after the locking mechanism fully locks the tailgate. This results in uneven compression of the sealing strip at the top and bottom, reduced sealing effectiveness, and even leakage. The sealing strip at the top of the tailgate may also be over-compressed, reducing its service life. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a garbage truck tailgate mechanism and a garbage truck thereof, which can effectively improve the problem of unnecessary compression of the sealing strip during the tailgate closing process.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A garbage truck tailgate mechanism includes a container and a tailgate. The container is provided with a drive structure for driving the tailgate to flip. The rear frame of the container and / or the tailgate frame of the tailgate are provided with a sealing structure. The top of the container is provided with a sliding structure that can be moved and adjusted along the longitudinal direction of the garbage truck. The sliding structure is hinged to the top of the tailgate.

[0006] Further or preferred: The tailgate has two protruding lugs at the top, one of which is hinged to the drive structure and the other is hinged to the sliding structure.

[0007] The sliding structure includes a tailgate tilting support and a tailgate sliding shaft located on the top of the container. The tailgate tilting support has a sliding through hole along the longitudinal direction of the garbage truck. The tailgate sliding shaft passes through the sliding through hole. The rear end of the tailgate sliding shaft is hinged to another support lug. The front end of the tailgate sliding shaft is provided with a limiting nut.

[0008] The tailgate tilting support is provided with a sleeve, and a sliding through hole is formed inside the sleeve. The tailgate sliding shaft includes a front threaded section, a main body section, and a hinge section. The outer diameter of the front threaded section is smaller than the outer diameter of the main body section, and the main body section is located inside the sleeve.

[0009] The hinge section is provided with a limiting step that mates with the rear end of the sleeve.

[0010] The rear frame is provided with side locking mechanisms on both sides and bottom locking mechanism at the bottom.

[0011] The side locking mechanism is a double locking mechanism, which includes a double-headed hydraulic cylinder and a lock head limiting plate located at the rear end of the housing, and a movable insertion rod mechanism located on the tailgate. The upper and lower piston rod ends of the double-headed hydraulic cylinder are provided with wedge-shaped lock heads, and the lock head limiting plate is provided with lock holes corresponding to the wedge-shaped lock heads. The rear end of the housing is provided with an insertion hole structure for the end of the movable insertion rod mechanism to be inserted, corresponding to the lock head limiting plate.

[0012] The movable insertion rod mechanism includes a pair of lugs, with a roller between the ends of the pair of lugs, and a gap is formed between the pair of lugs and the roller for locking the lock head. The lock head limiting plate is provided with a roller guide ramp for guiding the roller insertion.

[0013] The bottom locking mechanism includes a sliding rod and a locking cylinder located at the bottom of the box, and a lower locking pin located at the bottom of the tailgate. The front end of the sliding rod is connected to the locking cylinder, and the rear end of the sliding rod is hinged to a lower locking ring body. A guide roller is provided below the lower locking ring body, and the bottom of the box is provided with a bottom locking guide structure for guiding the guide roller.

[0014] A garbage truck includes a chassis and the aforementioned garbage truck tailgate mechanism, wherein the container is mounted on the chassis.

[0015] Compared with the prior art, the present invention has the following advantages: The garbage truck's tailgate mechanism and its structural design are reasonable. During the closing and descent of the tailgate, when the tailgate sealing strip contacts the rear frame of the garbage container, the specially designed tailgate sliding shaft mechanism allows the tailgate to automatically slide outward a certain distance, pulling the tailgate sliding shaft. The tailgate's rotation center shifts outward accordingly. At this point, the tailgate does not need to compress the sealing strip as it continues to descend, allowing the tailgate to close smoothly. This effectively improves the problem of unnecessary compression of the sealing strip during the tailgate closing process. After the tailgate descends to the correct position, the upper and lower parts of the tailgate are simultaneously pulled and moved towards the garbage container by the locking mechanism, ultimately pressing the sealing strip tightly. This ensures that the sealing strip is subjected to uniform force from top to bottom, reducing the risk of sewage leakage during garbage collection and transportation. Attached Figure Description

[0016] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings: Figure 1 This is a schematic diagram of the tailgate mechanism of the present invention in the locked state.

[0017] Figures 2 to 4 This is a schematic diagram of the installation of the tailgate sliding shaft of the present invention.

[0018] Figures 1 to 4 middle: 1.1 - Rear section of the garbage bin body; 1.2 - Tailgate tilting cylinder; 1.3 - Tilting cylinder seat; 1.4 - Tilting cylinder pin; 1.5 - Tailgate tilting shaft; 1.6 - Tailgate; 1.7 - Insert rod mounting window cover; 1.8 - Double locking mechanism cover; 1.9 - Bottom locking mechanism; 1.10 - Tailgate sliding shaft; 1.11 - Limit nut.

[0019] Figure 5 This is a schematic diagram of the rear box structure of the present invention.

[0020] Figure 6 This is a schematic diagram of the double locking mechanism of the present invention.

[0021] Figure 5 and Figure 6 middle: 1.1.1 - Rear section body main body, 1.1.2 - Double locking mechanism, 1.1.3 - Rear frame, 1.1.4 - Tailgate flip support, 1.1.5 - Flip cylinder seat, 1.1.6 - Bottom locking guide mechanism, 1.1.2.1 - Lock head limiting plate, 1.1.2.2 - Roller guide ramp, 1.1.2.3 - Double-headed cylinder, 1.1.2.4 - Double-headed cylinder fixing seat, 1.1.2.5 - Wedge lock head.

[0022] Figure 7 and Figure 8 This is a schematic diagram of the tailgate structure of the present invention.

[0023] Figure 7 and Figure 8 middle: 1.6.1 - Tailgate body, 1.6.2 - Tailgate frame, 1.6.3 - Movable insert rod mechanism, 1.6.4 - Sealing strip, 1.6.5 - Flip support, 1.6.6 - Insert rod mounting shaft, 1.6.7 - Insert rod mounting seat, 1.6.8 - Lower locking pin.

[0024] Figure 9 This is a schematic diagram of the bottom locking mechanism of the present invention.

[0025] Figure 9 middle: 1.9.1-Bottom locking cylinder, 1.9.2-Middle large pull rod, 1.9.3-Sliding pull rod, 1.9.4-Lower locking ring rotating shaft, 1.9.5-Lower locking ring body, 1.9.6-Guide roller.

[0026] Figure 10 and Figure 11 This is a schematic diagram of the tailgate closing and lowering according to the present invention. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0028] Although the invention has been shown and described herein with reference to specific embodiments, it is not intended to be limited to the details shown. Rather, various modifications in detail may be made within the equivalent scope and scope of the claims without departing from the invention. In the drawings, the same item numbers refer to the same elements.

[0029] Throughout this disclosure, various terms are used to describe the physical shape or arrangement of features. Many of these terms are used to describe features conforming to a cylindrical or generally cylindrical geometry with the feature as its radius and a central axis perpendicular to that radius. Unless otherwise specified, the terms are given the following meanings: The terms “longitudinal,” “longitudinal,” “axial,” and “axial” refer to a direction, dimension, or orientation parallel to the central axis. The terms “radial” and “radially” refer to a direction, dimension, or orientation perpendicular to the central axis. The terms “inward” and “inner” refer to a direction, dimension, or orientation extending radially toward the central axis. The terms “outward” and “outer” refer to a direction, dimension, or orientation extending radially away from the central axis.

[0030] In this specification, relative terms such as “horizontal,” “vertical,” “upward,” “downward,” “top,” and “bottom,” and their derivatives (e.g., “horizontal,” “downward,” “upward,” etc.) should be interpreted as referring to the direction described or the direction shown in the accompanying drawings. These relative terms are for ease of description and are not generally intended to require a specific direction.

[0031] like Figures 1 to 11 As shown, the garbage truck tailgate mechanism includes a container and a tailgate. The container is provided with a drive structure for driving the tailgate to tilt. The drive structure can be a tailgate tilting cylinder, which is located above the top of the container. The top of the tailgate and the rear end of the tailgate tilting cylinder are hinged together. The rear frame of the container and / or the tailgate frame of the tailgate are provided with a sealing structure. The top of the container is provided with a sliding structure that can be adjusted along the longitudinal direction of the garbage truck. The sliding structure is hinged together with the top of the tailgate.

[0032] The top of the tailgate has two protruding lugs. One lug is hinged to the rear end of the tailgate tilting cylinder, and the other lug is hinged to the sliding structure. The lug that is hinged to the tailgate tilting cylinder is located above and behind the other lug. The two lugs can be designed as an integral structure, which is stable and reliable.

[0033] The sliding structure includes a tailgate tilting support and a tailgate sliding shaft located on the top of the container. The tailgate tilting support has a sliding through hole along the longitudinal direction of the garbage truck. The tailgate sliding shaft passes through the sliding through hole. The rear end of the tailgate sliding shaft is hinged to another support lug via the tailgate tilting shaft. The front end of the tailgate sliding shaft is provided with a limiting nut. The tailgate sliding shaft can be moved longitudinally within the sliding through hole to adjust its position, thereby adjusting the position of the tailgate tilting shaft.

[0034] Furthermore, the tailgate tilting support is provided with a sleeve, and a sliding through hole is formed inside the sleeve. The tailgate sliding shaft includes a front threaded section, a main body section, and a hinge section. The outer diameter of the front threaded section is smaller than the outer diameter of the main body section, and the main body section is located inside the sleeve. The hinge section is provided with a limiting step that mates with the rear end of the sleeve. The reserved sliding distance can be adjusted by adjusting the distance between the limiting nut and the limiting step.

[0035] Both sides of the rear frame are equipped with side locking mechanisms, and the bottom of the rear frame is equipped with a bottom locking mechanism. The side locking mechanisms are double locking mechanisms, meaning each side forms two locking points. After the tailgate descends to its final position, the double locking mechanisms on the sides of the garbage bin slide the tailgate towards the rear frame and lock it in place. During this process, the sealing strip experiences even force from top to bottom, ensuring a uniform fit with the rear frame. After the double locking mechanisms complete locking, the additional locking mechanism at the bottom of the garbage bin simultaneously locks both sides of the lower end of the tailgate. The four-point locking on the sides of the tailgate, plus the two-point locking from the bottom additional locking mechanism, ensures that the tailgate sealing strip remains reliably sealed even when garbage inside the garbage bin compresses the tailgate during operation, preventing sewage leakage.

[0036] The double locking mechanism includes a double-headed hydraulic cylinder and a lock head limiting plate located at the rear end of the housing, and a movable insert rod mechanism located on the tailgate. The double-headed hydraulic cylinder is vertically arranged, and both the upper and lower piston rod ends of the double-headed hydraulic cylinder are equipped with wedge-shaped lock heads. The lock head limiting plate is equipped with lock holes corresponding to the wedge-shaped lock heads. The rear end of the housing is equipped with an insertion hole structure for the end of the movable insert rod mechanism to be inserted, corresponding to the lock head limiting plate. Two locking positions are formed on each side of the housing, ensuring stable and reliable locking.

[0037] The movable insert mechanism includes a pair of lugs, with a roller between the ends of the lugs. A gap is formed between the lugs and the rollers for the lock head to be inserted and locked. The lock head limiting plate is provided with a roller guide ramp for guiding the roller insertion. The movable insert is accurately inserted into the locking position.

[0038] The bottom locking mechanism includes a sliding rod and a locking cylinder located at the bottom of the box, and a lower locking pin located at the bottom of the tailgate. The front end of the sliding rod is connected to the locking cylinder, and the rear end of the sliding rod is hinged to a lower locking ring body. A guide roller is provided below the lower locking ring body. The bottom of the box is provided with a bottom locking guide structure for guiding the guide roller, so that the bottom locking is stable and reliable.

[0039] The present invention provides a garbage truck, including a chassis and the aforementioned garbage truck tailgate mechanism, with the container body mounted on the chassis.

[0040] This invention relates to a garbage truck tailgate mechanism, mainly comprising a rear section of the garbage container, a tailgate, a tailgate tilting cylinder, a tailgate sliding shaft, a tailgate tilting pin, a tilting cylinder mounting pin, and a multi-locking structure. The rear section of the container has a rear frame at its rear end, a tailgate tilting cylinder seat and a tailgate tilting support at the top, and a bottom locking device at the bottom. Double locking mechanisms are located inside both sides of the rear frame. A tilting cylinder pin is installed in the tilting cylinder seat, and one end of the tilting cylinder is hinged to the tilting cylinder seat via the tilting cylinder pin. A tailgate sliding shaft is installed in the tailgate tilting support, and a tailgate tilting pin is installed at the tail end of the sliding shaft. The tilting support at the top of the tailgate is hinged to the tailgate sliding shaft via the tailgate tilting pin. A tailgate frame surrounds the tailgate body, and a sealing strip and a forward-extending movable rod mechanism are installed on the front surface of the tailgate frame. A tilting cylinder pin is installed on the top of the tilting support at the top of the tailgate, and the tailgate is hinged to the other end of the tilting cylinder via the tilting cylinder pin.

[0041] The garbage truck tailgate mechanism and its structural design are reasonable. During the closing and descent of the garbage truck tailgate, when the tailgate sealing strip contacts the rear frame of the garbage container, the specially designed tailgate sliding shaft mechanism allows the tailgate to automatically slide outward a certain distance, pulling the tailgate sliding shaft. The center of rotation of the tailgate shifts outward accordingly. At this time, the tailgate does not need to compress the sealing strip to continue descending, allowing the tailgate to descend and close smoothly. This can effectively improve the problem of unnecessary compression of the sealing strip during the tailgate closing process. After the tailgate descends to the bottom, the upper and lower parts of the tailgate are simultaneously pulled and moved closer to the garbage container by the locking mechanism and finally press the sealing strip, which can ensure that the sealing strip is subjected to uniform force from top to bottom, reducing the risk of sewage leakage during garbage collection and transportation.

[0042] A preferred embodiment of the present invention is as follows: like Figures 1 to 11 As shown, the present invention provides a garbage truck tailgate mechanism, which mainly includes a rear section of the garbage container, a tailgate tilting cylinder, a tailgate, and a multi-locking structure.

[0043] The rear section of the garbage bin 1.1 mainly consists of the rear section body 1.1.1, the rear frame 1.1.3, the tailgate tilting support 1.1.4, the tilting cylinder seat 1.1.5, the double locking mechanism 1.1.2, and the bottom locking mechanism 1.9.

[0044] The rear section of the main body 1.1.1 has a base frame structure with longitudinal beams and transverse beams at the bottom, and a rear enclosure 1.1.3 at the rear. The rear enclosure 1.1.3 is a ring-shaped semi-enclosed structure, with symmetrically arranged double locking mechanisms 1.1.2 on the left and right sides inside. Double locking mechanism cover plates 1.8 are provided outside the double locking mechanisms 1.1.2 for shielding and protection.

[0045] The double locking mechanism 1.1.2 mainly consists of a lock head limiting plate 1.1.2.1, a roller guide ramp plate 1.1.2.2, a double-headed hydraulic cylinder 1.1.2.3, a double-headed hydraulic cylinder fixing seat 1.1.2.4, a wedge-shaped lock head 1.1.2.5, and a hydraulic cylinder fixing cover. The lock head limiting plate 1.1.2.1, the roller guide ramp plate 1.1.2.2, and the double-headed hydraulic cylinder fixing seat 1.1.2.4 are welded and fixed to the inner side of the rear frame 1.1.3. The locking head limiting plate 1.1.2.1 and the two roller guide ramp plates 1.1.2.2 are combined to form a rod insertion cavity. The double-headed cylinder 1.1.2.3 is fixed to the double-headed cylinder fixing seat 1.1.2.4 by the cylinder fixing cover and bolt group. The pointed parts of the wedge-shaped locking heads 1.1.2.5 at both ends of the cylinder are inserted into the rod insertion cavity, with the height not exceeding the slope surface of the two roller guide ramp plates, and can slide up and down under the constraint of the locking head limiting plate 1.1.2.1.

[0046] The tilting cylinder seat 1.1.5 is located on the top of the rear box body 1.1.1, and is arranged symmetrically on the left and right sides. It is used to install and fix the tilting cylinder pin 1.4 and the tailgate tilting cylinder 1.2.

[0047] The tailgate tilting support 1.1.4 is located on the top of the garbage bin body 1.1.1 and the upper end of the rear frame 1.1.3, and is arranged symmetrically on the left and right sides. It is used to install and fix the tailgate sliding shaft 1.10 and the limit nut 1.11.

[0048] The tailgate sliding shaft 1.10 can slide freely within the sleeve of the tailgate tilting support 1.1.4 for a certain distance. The tailgate tilting shaft 1.5 is installed at the tail end of the shaft, and the tailgate tilting shaft 1.5 is hinged to the tilting support 1.6.5 on the upper part of the tailgate 1.6.

[0049] like Figure 9 As shown, the bottom locking mechanism 1.9 mainly consists of a bottom locking guide mechanism 1.1.6, a central large tie rod 1.9.2, a bottom locking cylinder 1.9.1, a sliding tie rod 1.9.3, a lower locking ring rotating shaft 1.9.4, a locking ring body 1.9.5, and guide rollers 1.9.6. The bottom locking cylinder mounting base is fixed to the central crossbeam of the main frame and is hinged to one end of the bottom locking cylinder 1.9.1 via a pin. The central large tie rod 1.9.2 passes through the left and right longitudinal beams of the frame and can slide back and forth within a pre-reserved window on the longitudinal beam. It is hinged to the other end of the bottom locking cylinder 1.9.1 via a pin. The upper part of the bottom locking guide mechanism 1.1.6 is a rectangular sleeve formed by welding thick steel plates, and the lower part is equipped with roller guide plates. The entire assembly is symmetrically distributed and welded to the lower part of the rear frame 1.1.3 on both sides of the longitudinal beams of the frame. The sliding rod 1.9.3 is installed inside the rectangular sleeve of the bottom locking guide mechanism 1.1.6 and can slide freely back and forth. Its front end is connected and fixed to the middle large rod 1.9.2 by bolts, and its rear end is equipped with a lower locking ring rotating shaft 1.9.4. The front end of the lower locking ring body 1.9.5 is hinged to the sliding rod 1.9.3 through the lower locking ring rotating shaft 1.9.4, and its rear end has an annular structure for hooking the lower locking pin 1.6.8 at the bottom of the tailgate 1.6. A guide roller 1.9.6 is installed at the bottom and is engaged with the lower end face of the roller guide plate at the bottom of the bottom locking guide mechanism 1.1.6, allowing it to roll freely on it.

[0050] like Figure 7 and Figure 8As shown, the tailgate 1.6 mainly consists of a tailgate body 1.6.1, a tailgate frame 1.6.2, a movable rod mechanism 1.6.3, a sealing strip 1.6.4, a tilting support 1.6.5, a rod mounting shaft 1.6.6, a rod mounting seat 1.6.7, and a lower locking pin 1.6.8. The tailgate body 1.6.1 is welded from steel plates and nested inside the tailgate frame 1.6.2. The tailgate frame 1.6.2 is a ring-shaped semi-enclosed structure. Two symmetrically arranged rod mounting seats 1.6.7 are located on each side of the frame, both vertically and horizontally. Correspondingly, the outer side of the tailgate frame 1.6.2 has mounting windows for the rod mounting shaft 1.6.6 and rod mounting window covers 1.7 to conceal the windows. Symmetrically arranged windows for the movable rod mechanism 1.6.3 to be installed and to swing vertically are located on the left and right sides of the front face of the frame. The movable insert rod mechanism 1.6.3 is hinged to the insert rod mounting base 1.6.7 via the insert rod mounting shaft 1.6.6. The flip support 1.6.5 is located at the top of the tailgate body 1.6.1 and is welded to both the tailgate body 1.6.1 and the tailgate frame 1.6.2, arranged symmetrically on both sides. The lower locking pin 1.6.8 is located at the bottom of the tailgate frame 1.6.2, arranged symmetrically on both sides, and its position corresponds to the bottom locking mechanism 1.9. The sealing strip 1.6.4 is installed on the front end face of the tailgate frame 1.6.2.

[0051] When the tailgate 1.6 begins to close, the piston rod of the tailgate tilting cylinder 1.2 extends rearward, and the tailgate 1.6 rotates and descends around the tailgate tilting shaft 1.5, which is installed at the rear end of the tailgate sliding shaft 1.10. During the descent, when the sealing strip 1.6.4 on the upper part of the tailgate frame 1.6.2 contacts the rear end face of the rear frame 1.1.3 of the garbage bin, the rear frame 1.1.3 will press against the tailgate 1.6 through the sealing strip 1.6.4. At this time, the piston rod of the tailgate tilting cylinder 1.2 continues to extend rearward, and the tailgate 1.6 will continue to rotate and descend around the tailgate tilting shaft 1.5 while simultaneously rotating downward around the contact point between the sealing strip 1.6.4 and the rear frame 1.1.3, pulling the tailgate sliding shaft 1.10 rearward. During this process, the tailgate rotates and descends while the tailgate sliding shaft 1.10 is continuously pulled outward until it is stopped by the limit nut 1.11 and is no longer pulled. After the tailgate 1.6 is lowered into place, the tailgate frame 1.6.2 is in a nearly vertical state, and the sealing strip 1.6.4 is suspended in the air or in slight contact with the rear end face of the rear frame 1.1.3 of the garbage bin.

[0052] During the rotation and descent of the tailgate 1.6, one end of the movable insert rod mechanism 1.6.3 with rollers installed on the tailgate frame 1.6.2 will insert into the middle of the insert rod cavity of the double locking mechanism 1.1.2 inside the rear frame 1.1.3, and roll along the roller guide ramp 1.1.2.2.

[0053] Once the tailgate 1.6 has descended to its final position, the hydraulic circuit of the tailgate tilting cylinder 1.2 closes, and the cylinder is in a free-floating state. At this time, the piston rods of the double-headed cylinders 1.1.2.3 extend to both ends, causing the wedge-shaped lock heads 1.1.2.5 to extend to both ends as well. The large ramp surface of the wedge-shaped lock heads 1.1.2.5 will push the rollers of the movable inserting rod mechanism 1.6.3 towards the front of the garbage bin. Since the piston rods of the double-headed cylinders 1.1.2.3 extend to both ends synchronously, the four wedge-shaped lock heads 1.1.2.5 will simultaneously pull the movable inserting rod mechanism 1.6.3 closer to the rear frame 1.1.3 of the garbage bin, causing the tailgate 1.6 to move horizontally and close to the rear frame 1.1.3. When the piston rods of the dual-headed cylinders 1.1.2.3 are fully extended, the tailgate 1.6 is locked in place. At this time, the sealing strip 1.6.4 is evenly pressed and adhered to the rear end face of the rear frame 1.1.3 of the garbage bin. The sealing strip is compressed evenly from top to bottom, which can effectively ensure the sealing effect on sewage.

[0054] After the double locking mechanism 1.1.2 locks the tailgate 1.6, the bottom locking cylinder 1.9.1, located in the middle of the longitudinal beam of the garbage bin's base frame, retracts forward, pulling the central large pull rod 1.9.2, which in turn moves the sliding pull rod 1.9.3 forward, simultaneously pulling the lower locking ring body 1.9.5 forward. Under the constraint of the bottom locking guide mechanism 1.1.6, the guide roller 1.9.6 at the bottom of the lower locking ring body 1.9.5 pushes the lower locking ring body 1.9.5 to rotate upward, ultimately hooking onto the lower locking pin 1.6.8 at the bottom of the tailgate frame 1.6.2 and pulling it forward to further lock the tailgate 1.6. After the bottom locking cylinder 1.9.1 retracts into place, the bottom locking mechanism 1.9 is fully locked. This structure is used to prevent garbage from squeezing the tailgate body 1.6.1 when the garbage bin is full, causing deformation of the lower part of the tailgate frame 1.6.2, which could lead to partial leaks in the sealing strip and sewage leakage.

[0055] When the tailgate 1.6 is ready to open, the bottom locking cylinder 1.9.1 extends forward first, pushing the middle large pull rod 1.9.2 to drive the sliding pull rod 1.9.3 to slide backward. Simultaneously, the lower locking ring body 1.9.5 is pushed backward. At this time, the lower locking ring body 1.9.5 rotates downward under its own weight and the combined action of the guide roller 1.9.6, gradually disengaging from the lower locking pin 1.6.8. Then, the piston rod of the double-headed cylinder 1.1.2.3 of the double locking mechanism 1.1.2 retracts, and the movable insert rod mechanism 1.6.3 unlocks. Next, the piston rod of the tailgate tilting cylinder 1.2 retracts forward, pulling the tailgate 1.6 upward around the tailgate tilting shaft 1.5. At this time, the tailgate sliding shaft 1.10 is pushed forward to abut the rear end face of the tailgate tilting support 1.1.4 sleeve. When the piston rod of the tailgate tilting cylinder 1.2 retracts into place, the tailgate stops rising.

[0056] During the tailgate descent, the tailgate rotation point can move backward, and the tailgate sealing strip does not need to be compressed during the descent, ensuring that the tailgate can descend smoothly into place; this can effectively improve the problem of unnecessary compression of the sealing strip during tailgate closing and extend the service life of the sealing strip.

[0057] The above description is merely an illustration of preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0058] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A garbage truck tailgate mechanism, comprising a container body and a tailgate, wherein the container body is provided with a drive structure for driving the tailgate to tilt, and the rear frame of the container body and / or the tailgate frame of the tailgate are provided with a sealing structure, characterized in that: The top of the container is equipped with a sliding structure that can be adjusted and moved longitudinally along the garbage truck. The sliding structure is hinged to the top of the tailgate.

2. The garbage truck tailgate mechanism as described in claim 1, characterized in that: The tailgate has two protruding lugs at the top, one of which is hinged to the drive structure and the other is hinged to the sliding structure.

3. The garbage truck tailgate mechanism as described in claim 2, characterized in that: The sliding structure includes a tailgate tilting support and a tailgate sliding shaft located on the top of the container. The tailgate tilting support has a sliding through hole along the longitudinal direction of the garbage truck. The tailgate sliding shaft passes through the sliding through hole. The rear end of the tailgate sliding shaft is hinged to another support lug. The front end of the tailgate sliding shaft is provided with a limiting nut.

4. The garbage truck tailgate mechanism as described in claim 3, characterized in that: The tailgate tilting support is provided with a sleeve, and a sliding through hole is formed inside the sleeve. The tailgate sliding shaft includes a front threaded section, a main body section, and a hinge section. The outer diameter of the front threaded section is smaller than the outer diameter of the main body section, and the main body section is located inside the sleeve.

5. The garbage truck tailgate mechanism as described in claim 4, characterized in that: The hinge section is provided with a limiting step that mates with the rear end of the sleeve.

6. The garbage truck tailgate mechanism as described in claim 1, characterized in that: The rear frame is provided with side locking mechanisms on both sides and bottom locking mechanism at the bottom.

7. The garbage truck tailgate mechanism as described in claim 6, characterized in that: The side locking mechanism is a double locking mechanism, which includes a double-headed hydraulic cylinder and a lock head limiting plate located at the rear end of the housing, and a movable insertion rod mechanism located on the tailgate. The upper and lower piston rod ends of the double-headed hydraulic cylinder are provided with wedge-shaped lock heads, and the lock head limiting plate is provided with lock holes corresponding to the wedge-shaped lock heads. The rear end of the housing is provided with an insertion hole structure for the end of the movable insertion rod mechanism to be inserted, corresponding to the lock head limiting plate.

8. The garbage truck tailgate mechanism as described in claim 7, characterized in that: The movable insertion rod mechanism includes a pair of lugs, with a roller between the ends of the pair of lugs, and a gap is formed between the pair of lugs and the roller for locking the lock head. The lock head limiting plate is provided with a roller guide ramp for guiding the roller insertion.

9. The garbage truck tailgate mechanism as described in claim 6, characterized in that: The bottom locking mechanism includes a sliding rod and a locking cylinder located at the bottom of the box, and a lower locking pin located at the bottom of the tailgate. The front end of the sliding rod is connected to the locking cylinder, and the rear end of the sliding rod is hinged to a lower locking ring body. A guide roller is provided below the lower locking ring body, and the bottom of the box is provided with a bottom locking guide structure for guiding the guide roller.

10. A garbage truck, comprising a chassis, characterized in that: It also includes the garbage truck tailgate mechanism as described in any one of claims 1 to 9, wherein the container is mounted on the chassis.

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