A rear-mounted compression garbage truck

Abstract

The application provides a rear-mounted compression type garbage truck, which comprises a vehicle body, a garbage compartment arranged on the vehicle body, a material pressing device arranged at the front end of the garbage compartment, a material feeding device arranged at the tail end of the garbage compartment, a compression chamber arranged in the garbage compartment, and a water storage device arranged at the bottom end of the compression chamber; the water storage device comprises a supporting plate, a first water collecting cavity arranged in the supporting plate, a plurality of first water inlet holes uniformly arranged at the top end of the supporting plate and communicated with the first water collecting cavity, and a sewage bag arranged at the bottom end of the supporting plate; the water storage device further comprises a water pumping mechanism, the water pumping mechanism comprises a cylinder body, the first end of the cylinder body is connected with the first water collecting cavity and the sewage bag through a first water inlet pipe and a first water outlet pipe respectively, a first check valve is arranged on the first water inlet pipe, a first non-return valve is arranged on the first water outlet pipe, a piston head is sealingly and slidably connected in the cylinder body, and the piston head is connected with a power structure; the application can adjust the storage capacity according to the sewage amount and effectively prevent the sewage from surging during the driving of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of garbage trucks, in particular to a rear-mounted compression garbage truck. Background Art

[0002] As people's living standards and quality of life continue to improve, the amount of urban domestic waste is rapidly increasing, and its impact on the environment is becoming increasingly significant. In this context, issues such as timely collection and closed transportation of garbage have become particularly important. Compression garbage trucks, as a key tool in urban sanitation work, effectively reduce the volume of garbage by compressing and filling it into the garbage compartment, improving transportation efficiency and ensuring smooth garbage collection and transportation.

[0003] In practice, when water accumulates in the trash bin or the garbage has a high water content, sewage accumulates in the trash compartment. To address this, most existing garbage trucks install sewage tanks on the trash compartment to store this sewage. However, the storage capacity of these sewage tanks is rated and cannot be adjusted according to the amount of sewage. Consequently, when the amount of sewage is large, the tank cannot fully accommodate it, causing excess sewage to leak and cause secondary pollution to the environment. When the amount of sewage is small, not only does the sewage tank storage space waste, but it also reduces the overall space utilization of the trash compartment. Furthermore, the insufficient sewage tends to surge during driving, adversely affecting the vehicle's driving stability. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides a rear-mounted compression garbage truck, which can not only adjust the storage capacity according to the amount of sewage, but also effectively prevent the sewage from surging during the driving process of the vehicle.

[0005] The present invention adopts the following technical solutions.

[0006] A rear-loading compression garbage truck comprises a vehicle body, a garbage compartment is provided on the vehicle body, a material pressing device is provided at the front end of the garbage compartment, a material loading device is provided at the rear end of the garbage compartment, a compression chamber is provided in the garbage compartment, and a water storage device is provided at the bottom end of the compression chamber;

[0007] The water storage device includes a support plate arranged horizontally and slidably connected to the garbage compartment in a vertical direction, a first water collection cavity is provided in the support plate, a plurality of first water inlet holes connected to the first water collection cavity are uniformly distributed on the top of the support plate, and a sewage bag is provided at the bottom of the support plate;

[0008] It also includes a water pumping mechanism, which includes a cylinder body. The first end of the cylinder body is connected to the first water collecting chamber and the sewage bag through a first water inlet pipe and a first water supply pipe respectively. A first check valve is provided on the first water inlet pipe, and a first check valve is provided on the first water supply pipe. A piston head is sealingly and slidingly connected in the cylinder body, and the piston head is connected to a power structure. The power structure can drive the piston head to move back and forth along the cylinder body.

[0009] Furthermore, the material pressing device includes a material pressing plate slidably connected to the garbage compartment in a horizontal direction, and a first hydraulic rod drivingly connected to the material pressing plate;

[0010] The pressing plate includes a fixed plate body and a movable plate body slidably connected to the fixed plate body along a vertical direction.

[0011] Furthermore, a vertically extending guide rod is provided on the fixed plate body, a guide seat slidably connected to the guide rod is provided on the movable plate body, and a spring is provided between the fixed plate body and the movable plate body.

[0012] Furthermore, the power structure includes a guide rail provided on the cylinder of the first hydraulic rod and extending along the length direction of the first hydraulic rod, a slider is slidably connected to the guide rail, a transmission rod is hinged on the slider, and the transmission rod is integrally connected to the piston head.

[0013] Furthermore, the loading device includes a garbage bin hinged to the garbage compartment, and a first power member connecting the garbage compartment and the garbage bin, wherein the first power member is used to drive the garbage bin to rotate to open or close the rear end of the garbage compartment;

[0014] A lifting mechanism is provided at the tail end of the garbage bin, a feeding channel for communicating with the compression chamber is provided in the garbage bin, and a pushing mechanism is provided at one end of the feeding channel facing away from the garbage compartment.

[0015] Furthermore, the lifting mechanism includes a first swing arm, a second swing arm and a barrel plate, wherein the first ends of the first swing arm and the second swing arm are hinged to the garbage bin, and the second ends of the first swing arm and the second swing arm are hinged to the barrel plate;

[0016] A second power member is connected between the first swing arm and the garbage bin;

[0017] The second swing arm includes a supporting section and a telescopic section slidably connected to the supporting section along the length direction of the supporting section, and a third power member is connected between the supporting section and the telescopic section.

[0018] Furthermore, the top of the garbage bin is open and hinged with a cover plate, and a linkage rod is connected between the cover plate and the support section.

[0019] Furthermore, the pushing mechanism includes a pushing plate slidably connected to the garbage bin, and a second hydraulic rod drivingly connected to the pushing plate. The garbage bin is provided with a feeding hole aligned with the pushing plate.

[0020] Furthermore, a partition is provided at the bottom end of the feed channel, a second water collection chamber is provided between the bottom of the partition and the garbage bin, a plurality of second water inlet holes connected to the second water collection chamber are evenly distributed on the top of the partition, and a plurality of third water inlet holes connected to the second water collection chamber are evenly distributed at the front end of the garbage bin;

[0021] The second end of the cylinder body is connected to the second water collecting chamber and the sewage bag through a second water inlet pipe and a second water supply pipe respectively. The second water inlet pipe is provided with a second check valve, and the second water supply pipe is provided with a second check valve.

[0022] Furthermore, a vertically extending bottom shell is provided on the outer side of the sewage bag, the bottom end of the bottom shell is integrally connected to the garbage compartment, a telescopic shell is slidably sleeved inside the bottom shell, and the top end of the telescopic shell is integrally connected to the supporting plate.

[0023] The beneficial effects of the present invention are:

[0024] In actual operation, the sewage in the compression chamber flows naturally into the first water collection chamber under the action of gravity. The power structure drives the piston head to reciprocate within the cylinder, thereby pumping the sewage in the first water collection chamber into the sewage bladder. The volume of the sewage bladder increases with the amount of sewage pumped in, thereby adjusting the storage capacity according to the amount of sewage.

[0025] As the volume of the sewage bag gradually increases, the support plate will move upward accordingly, thereby compressing the garbage in the compression chamber in the vertical direction and improving the compression effect.

[0026] Furthermore, the sewage in the bladder is subjected to a certain downward pressure from the combined action of the support plate and the waste in the compression chamber. This downward pressure stabilizes the sewage, effectively preventing it from surging during vehicle operation. Conversely, if the sewage in the bladder tends to surge during vehicle operation, this tendency will exert a certain upward pressure on the support plate. This upward pressure helps to enhance the support plate's vertical compression of the waste in the compression chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1This is one of the overall structural diagrams of the first embodiment;

[0029] Figure 2 for Figure 1 A magnified view of part E;

[0030] Figure 3 This is one of the partial structural diagrams of the first embodiment;

[0031] Figure 4 This is the second partial structural diagram of the first embodiment;

[0032] Figure 5 This is the second overall structural diagram of the first embodiment;

[0033] Figure 6 This is the third overall structural diagram of the first embodiment;

[0034] Figure 7 Schematic diagram of the overall structure of the second embodiment.

[0035] Description of reference numerals:

[0036] Car body 1,

[0037] Garbage compartment 2, compression chamber 2a,

[0038] Pressing device 3,

[0039] Pressing plate 31, fixed plate body 311, movable plate body 312, spring 313, guide rod 3111, guide seat 3121,

[0040] The first hydraulic rod 32,

[0041] Feeding device 4,

[0042] Garbage bin 41, feeding channel 41a, feeding hole 41b, second water collecting chamber 41c, third water inlet hole 41d,

[0043] The first power member 42,

[0044] Lifting mechanism 43, first swing arm 431, second swing arm 432, barrel plate 433, second power member 434, support section 4321, telescopic section 4322, third power member 4323,

[0045] Pushing mechanism 44, pushing plate 441, second hydraulic rod 442,

[0046] Cover plate 45, linkage rod 46, partition plate 47,

[0047] Water storage device 5,

[0048] Support plate 51, first water collecting chamber 51a, first water inlet 51b,

[0049] Sewage bladder 52,

[0050] Water pumping mechanism 53, cylinder 531, first water inlet pipe 532, first check valve 5321, first water supply pipe 533, first check valve 5331, piston head 534, power structure 535, guide rail 5351, slider 5352, transmission rod 5353, second water inlet pipe 536, second check valve 5361, second water supply pipe 537, second check valve 5371,

[0051] Bottom shell 61, telescopic shell 62. DETAILED DESCRIPTION

[0052] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. In order to better illustrate this embodiment, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual size of the product.

[0053] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

[0054] As shown in the accompanying drawings, a rear-loading compression garbage truck includes a body 1, a garbage compartment 2 is provided on the body 1, a material pressing device 3 is provided at the front end of the garbage compartment 2, a material loading device 4 is provided at the rear end of the garbage compartment 2, a compression chamber 2a is provided in the garbage compartment 2, and a water storage device 5 is provided at the bottom end of the compression chamber 2a;

[0055] The water storage device 5 includes a horizontally arranged support plate 51 that is slidably connected to the garbage compartment 2 in the vertical direction. A first water collection chamber 51a is provided in the support plate 51. A plurality of first water inlet holes 51b that communicate with the first water collection chamber 51a are evenly distributed on the top of the support plate 51. A sewage bag 52 is provided at the bottom of the support plate 51.

[0056] It also includes a water pumping mechanism 53, which includes a cylinder body 531. The first end of the cylinder body 531 is connected to the first water collecting chamber 51a and the sewage bag 52 through a first water inlet pipe 532 and a first water supply pipe 533 respectively. The first water inlet pipe 532 is provided with a first check valve 5321, and the first water supply pipe 533 is provided with a first check valve 5331. A piston head 534 is sealed and slidably connected in the cylinder body 531, and the piston head 534 is connected to a power structure 535. The power structure 535 can drive the piston head 534 to move back and forth along the cylinder body 531.

[0057] The first check valve 5321 is used to prevent the sewage in the cylinder 531 from flowing into the first water collecting chamber 51a through the first water inlet pipe 532, and the first check valve 5331 is used to prevent the sewage in the sewage bladder 52 from flowing into the cylinder 531 through the first water supply pipe 533. In this embodiment, the sewage bladder 52 is made of rubber.

[0058] In actual operation, the sewage in the compression chamber 2a naturally flows into the first water collection chamber 51a under the action of gravity. When the power structure 535 drives the piston head 534 away from the first end of the cylinder body 531, the sewage in the first water collection chamber 51a is sucked into the cylinder body 531. Then, when the power structure 535 drives the piston head 534 toward the first end of the cylinder body 531, the sewage in the cylinder body 531 is injected into the sewage bladder 52. As the power structure 535 drives the piston head 534 to reciprocate within the cylinder body 531, the sewage in the first water collection chamber 51a is continuously pumped into the sewage bladder 52.

[0059] The sewage bladder 52 expands as the amount of sewage inside it increases, adjusting its storage capacity accordingly. When the amount of sewage is high, the volume of the sewage bladder 52 also increases, fully accommodating the sewage. When the amount of sewage is low, the volume of the sewage bladder 52 also decreases, leaving more space inside the trash bin 2 for storing garbage. This helps ensure that the interior of the trash bin 2 is fully filled with garbage and sewage, thereby improving the overall space utilization of the trash bin 2.

[0060] As the volume of the sewage bag 52 gradually increases, the supporting plate 51 will move upward accordingly, thereby compressing the garbage in the compression chamber 2a in the vertical direction and improving the compression effect.

[0061] When it is necessary to unload the garbage, the sanitation worker can first open the drain valve connected to the sewage bag 52 to empty the sewage in the sewage bag 52, thereby reducing the volume of the sewage bag 52, and the support plate 51 also moves downward, thereby making the originally compacted garbage in the compression chamber 2a loose, reducing the friction between the garbage and the inner wall of the compression chamber 2a, which is conducive to emptying the garbage from the compression chamber 2a.

[0062] Furthermore, the sewage in the sewage bladder 52 is subjected to a certain downward pressure due to the combined effects of the support plate 51 and the garbage in the compression chamber 2a. This downward pressure can limit the fluctuations of the sewage, stabilizing it and effectively preventing it from surging during vehicle travel. Conversely, during vehicle travel, especially when accelerating, braking, and turning, the sewage in the sewage bladder 52 tends to surge. This surge exerts a certain upward pressure on the support plate 51, which in turn converts into a compressive force on the garbage in the compression chamber 2a, thereby enhancing the vertical compression effect of the support plate 51 on the garbage in the compression chamber 2a.

[0063] Preferably, the pressing device 3 includes a pressing plate 31 slidably connected to the garbage compartment 2 in the horizontal direction, and a first hydraulic rod 32 drivingly connected to the pressing plate 31;

[0064] The press plate 31 includes a fixed plate body 311 and a movable plate body 312 that is vertically slidably connected to the fixed plate body 311. When the support plate 51 moves upward, the movable plate body 312 also moves upward accordingly. The driving end of the first hydraulic rod 32 is hinged to the fixed plate body 311.

[0065] In actual operation, the first hydraulic rod 32 drives the pressing plate 31 to move back and forth multiple times in the horizontal direction, so that the garbage in the compression chamber 2a is fully compressed, ensuring that the garbage is compacted evenly, thereby improving space utilization and enhancing the stability of garbage stacking.

[0066] Preferably, a vertically extending guide rod 3111 is provided on the fixed plate 311, a guide seat 3121 is provided on the movable plate 312 and is slidably connected to the guide rod 3111, and a spring 313 is provided between the fixed plate 311 and the movable plate 312. The spring 313 keeps the movable plate 312 in a downward motion, ensuring that the movable plate 312 is always in close contact with the support plate 51.

[0067] As attached Figure 1 、 3 As shown in Figures 6 and 7, in the first embodiment, the power structure 535 includes a guide rail 5351 which is provided on the cylinder of the first hydraulic rod 32 and extends along the length direction of the first hydraulic rod 32. A slider 5352 is slidably connected to the guide rail 5351, and a transmission rod 5353 is hinged to the slider 5352. The transmission rod 5353 is integrally connected to the piston head 534.

[0068] When the first hydraulic rod 32 pushes the press plate 31 toward the front end of the trash compartment 2, the cylinder of the first hydraulic rod 32 swings downward, driving the piston head 534 away from the first end of the cylinder 531, thereby drawing the sewage in the first water collection chamber 51a into the cylinder 531. Conversely, when the first hydraulic rod 32 pushes the press plate 31 toward the rear end of the trash compartment 2, the cylinder of the first hydraulic rod 32 swings upward, driving the piston head 534 toward the first end of the cylinder 531, thereby injecting the sewage in the cylinder 531 into the sewage bladder 52. As sewage continues to be injected, the sewage bladder 52 gradually expands, and the support plate 51 moves upward accordingly, cooperating with the press plate 31 to compress the garbage, improving the compression effect.

[0069] As attached Figure 7 As shown, in the second embodiment, the power structure 535 can also be a hydraulic cylinder or an electric push rod.

[0070] Preferably, the loading device 4 includes a garbage bin 41 hinged to the garbage bin 2, and a first power member 42 connecting the garbage bin 2 and the garbage bin 41, the first power member 42 being used to drive the garbage bin 41 to rotate to open or close the rear end of the garbage bin 2;

[0071] A lifting mechanism 43 is provided at the tail end of the garbage bin 41 , a feeding channel 41 a for communicating with the compression chamber 2 a is provided in the garbage bin 41 , and a pushing mechanism 44 is provided at the end of the feeding channel 41 a facing away from the garbage compartment 2 .

[0072] Preferably, the lifting mechanism 43 includes a first swing arm 431, a second swing arm 432 and a barrel plate 433, wherein the first ends of the first swing arm 431 and the second swing arm 432 are hinged to the garbage bin 41, and the second ends of the first swing arm 431 and the second swing arm 432 are hinged to the barrel plate 433;

[0073] A second power member 434 is connected between the first swing arm 431 and the garbage bin 41;

[0074] The second swing arm 432 includes a supporting section 4321 and a telescopic section 4322 slidably connected to the supporting section 4321 along the length direction of the supporting section 4321 . A third power member 4323 is connected between the supporting section 4321 and the telescopic section 4322 .

[0075] In this embodiment, the first power member 42 , the second power member 434 and the third power member 4323 are all hydraulic cylinders.

[0076] The detailed structure of the barrel plate 433 is well known to those skilled in the art, so no further description is given in this specification.

[0077] Preferably, the top of the garbage bin 41 is open and hinged with a cover plate 45 , and a linkage rod 46 is connected between the cover plate 45 and the support section 4321 .

[0078] It is understood that during the process of loading and transporting garbage, the first power member 42 remains in a shortened state, so that the garbage bin 41 is closely attached to and closes the rear end of the garbage compartment 2. When the garbage needs to be unloaded, the first power member 42 changes from a shortened state to an extended state, thereby pushing the garbage bin 41 to flip upward and opening the rear end of the garbage compartment 2.

[0079] In the initial state, the second power member 434 is shortened, the barrel plate 433 is at its lowest point and in an upright position, the third power member 4323 is extended, and the cover plate 45 is closed. When the trash needs to be dropped into the trash bin 41, the sanitation worker first attaches the trash can to the barrel plate 433. Next, the second power member 434 begins to extend, driving the first and second swing arms 431, 432 to swing upward, raising the upright barrel plate 433 and the trash can it carries to its highest point. During this process, the second swing arm 432 also drives the cover plate 45 upward via the linkage 46, shifting it from a closed position to an open position. Immediately thereafter, the third power member 4323 begins to shorten, causing the barrel plate 433 and the trash can it carries to flip, allowing the trash to slide under gravity into the trash bin 41.

[0080] Preferably, the pushing mechanism 44 includes a pushing plate 441 that is slidably connected to the garbage bin 41, and a second hydraulic rod 442 that is drivingly connected to the pushing plate 441. The garbage bin 41 is provided with a feed hole 41b that is aligned with the pushing plate 441. During the process of putting the garbage in the garbage bin into the garbage bin 41, the second hydraulic rod 442 remains in a shortened state and the feed hole 41b is opened. When the garbage successfully falls into the feed channel 41a, the second hydraulic rod 442 changes from a shortened state to an extended state, thereby pushing the garbage in the feed channel 41a into the compression bin through the feed hole 41b. During the process of the pressing plate 31 moving toward the rear end of the garbage compartment 2 to compress the garbage, the second hydraulic rod 442 remains in an extended state and the feed hole 41b is closed, thereby ensuring that the garbage in the compression bin does not reversely enter the feed channel 41a.

[0081] Preferably, a partition 47 is provided at the bottom end of the feed channel 41a, a second water collection chamber 41c is provided between the bottom of the partition 47 and the garbage bin 41, a plurality of second water inlet holes communicating with the second water collection chamber 41c are evenly distributed on the top of the partition 47, and a plurality of third water inlet holes 41d communicating with the second water collection chamber 41c are evenly distributed on the front end of the garbage bin 41;

[0082] The second end of the cylinder body 531 is connected to the second water collecting chamber 41c and the sewage bag 52 through a second water inlet pipe 536 and a second water supply pipe 537 respectively. The second water inlet pipe 536 is provided with a second check valve 5361, and the second water supply pipe 537 is provided with a second check valve 5371.

[0083] The second check valve 5361 is used to prevent the sewage in the cylinder 531 from flowing into the second water collecting chamber 41 c through the second water inlet pipe 536 , and the second check valve 5371 is used to prevent the sewage in the sewage bag 52 from flowing into the cylinder 531 through the second water supply pipe.

[0084] It is understandable that, when the garbage passes through the feed channel 41a, part of the sewage accumulated in the garbage will flow into the second water inlet cavity through the second water inlet hole.

[0085] When the first hydraulic rod 32 pushes the pressing plate 31 toward the rear end of the garbage compartment 2, the cylinder of the first hydraulic rod 32 swings upward, driving the piston head 534 away from the second end of the cylinder body 531, thereby sucking the sewage in the second water collection chamber 41c into the cylinder body 531. During this process, sewage will seep out of the garbage under the pressure of the pressing plate 31, and some of the seeped sewage will flow into the second water collection chamber 41c through the third water inlet hole 41d.

[0086] When the first hydraulic rod 32 pushes the pressing plate 31 to move toward the front end of the garbage compartment 2 , the cylinder of the first hydraulic rod 32 will swing downward, driving the piston head 534 to approach the second end of the cylinder 531 , thereby injecting the sewage in the cylinder 531 into the sewage bag 52 .

[0087] It should be noted that this embodiment also has a pumping mode. When there is no sewage in the first water collecting chamber 51a and / or the second water collecting chamber 41c, this embodiment enters the pumping mode, and the power structure 535 at this time will continue to drive the piston head 534 to move back and forth in the cylinder body 531. The reciprocating movement of the piston head 534 will inject external air into the sewage bag 52, aerating the sewage in the sewage bag 52. In addition, the garbage in the support plate 51 and the compression chamber 2a will exert downward pressure on the sewage bag 52, causing the pressure in the sewage bag 52 to increase, thereby prompting more air to dissolve in the sewage, thereby increasing the oxygen content in the sewage. The aeration effect and the increase in oxygen content will accelerate the growth and metabolism of aerobic microorganisms in the sewage, improve the self-purification ability of the sewage, improve the physical properties of the sewage, and prevent anaerobic fermentation of the sewage, which is beneficial to the subsequent treatment of the sewage.

[0088] It should be noted that, given the high compressibility of air, the air injected into the sewage bladder 52 has a relatively small impact on the volume of the sewage bladder 52 .

[0089] Preferably, in order to prevent the sewage bag 52 from being burst by sewage, a vertically extending bottom shell 61 is provided on the outer side of the sewage bag 52, the bottom end of the bottom shell 61 is integrally connected to the garbage compartment 2, and a telescopic shell 62 is slidably sleeved inside the bottom shell 61, and the top of the telescopic shell 62 is integrally connected to the support plate 51.

[0090] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A rear-loading compression garbage truck, comprising a vehicle body, wherein a garbage compartment is provided on the vehicle body, characterized in that: The front end of the garbage compartment is provided with a material pressing device, the rear end of the garbage compartment is provided with a material loading device, a compression chamber is provided in the garbage compartment, and the bottom end of the compression chamber is provided with a water storage device; The water storage device includes a support plate arranged horizontally and slidably connected to the garbage compartment in a vertical direction, a first water collection cavity is provided in the support plate, a plurality of first water inlet holes connected to the first water collection cavity are uniformly distributed on the top of the support plate, and a sewage bag is provided at the bottom of the support plate; The invention also includes a water pumping mechanism, the water pumping mechanism includes a cylinder body, a first end of the cylinder body is connected to the first water collecting chamber and the sewage bag through a first water inlet pipe and a first water supply pipe respectively, the first water inlet pipe is provided with a first check valve, the first water supply pipe is provided with a first check valve, a piston head is sealingly and slidably connected to the cylinder body, the piston head is connected to a power structure, and the power structure can drive the piston head to move back and forth along the cylinder body; The water pumping mechanism also has an air pumping mode. In the air pumping mode, there is no sewage in the first water collecting chamber, and the power structure continues to drive the piston head to move back and forth in the cylinder body, thereby injecting external air into the sewage bag.

2. A rear-loading compression garbage truck according to claim 1, characterized in that: The material pressing device includes a material pressing plate slidably connected to the garbage compartment in a horizontal direction, and a first hydraulic rod drivingly connected to the material pressing plate; The pressing plate includes a fixed plate body and a movable plate body slidably connected to the fixed plate body along a vertical direction.

3. The rear-loading compression garbage truck according to claim 2, characterized in that: The fixed plate body is provided with a vertically extending guide rod, the movable plate body is provided with a guide seat slidably connected with the guide rod, and a spring is provided between the fixed plate body and the movable plate body.

4. The rear-loading compression garbage truck according to claim 2, characterized in that: The power structure includes a guide rail provided on the cylinder of the first hydraulic rod and extending along the length direction of the first hydraulic rod. A slider is slidably connected to the guide rail, a transmission rod is hinged to the slider, and the transmission rod is integrally connected to the piston head.

5. The rear-loading compression garbage truck according to claim 1, characterized in that: The loading device includes a garbage bin hinged to the garbage compartment, and a first power member connecting the garbage compartment and the garbage bin, wherein the first power member is used to drive the garbage bin to rotate to open or close the rear end of the garbage compartment; A lifting mechanism is provided at the tail end of the garbage bin, a feeding channel for communicating with the compression chamber is provided in the garbage bin, and a pushing mechanism is provided at one end of the feeding channel facing away from the garbage compartment.

6. The rear-loading compression garbage truck according to claim 5, characterized in that: The lifting mechanism includes a first swing arm, a second swing arm and a barrel plate, wherein the first ends of the first swing arm and the second swing arm are hinged to the garbage bin, and the second ends of the first swing arm and the second swing arm are hinged to the barrel plate; A second power member is connected between the first swing arm and the garbage bin; The second swing arm includes a supporting section and a telescopic section slidably connected to the supporting section along the length direction of the supporting section, and a third power member is connected between the supporting section and the telescopic section.

7. The rear-loading compression garbage truck according to claim 6, characterized in that: The top of the garbage bin is open and hinged with a cover plate, and a linkage rod is connected between the cover plate and the support section.

8. The rear-loading compression garbage truck according to claim 5, characterized in that: The pushing mechanism includes a pushing plate slidably connected to the garbage bin and a second hydraulic rod drivingly connected to the pushing plate. A feeding hole aligned with the pushing plate is provided on the garbage bin.

9. The rear-loading compression garbage truck according to claim 5, characterized in that: A partition is provided at the bottom end of the feed channel, a second water collection chamber is provided between the bottom of the partition and the garbage bin, a plurality of second water inlet holes connected to the second water collection chamber are evenly distributed on the top of the partition, and a plurality of third water inlet holes connected to the second water collection chamber are evenly distributed at the front end of the garbage bin; The second end of the cylinder body is connected to the second water collecting chamber and the sewage bag through a second water inlet pipe and a second water supply pipe respectively. The second water inlet pipe is provided with a second check valve, and the second water supply pipe is provided with a second check valve.

10. The rear-loading compression garbage truck according to claim 1, characterized in that: The outer side of the sewage bag is provided with a vertically extending bottom shell, the bottom end of the bottom shell is integrally connected to the garbage compartment, a telescopic shell is slidably sleeved in the bottom shell, and the top end of the telescopic shell is integrally connected to the supporting plate.

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