Adjustable suspension system for sewage suction truck

Abstract

The invention relates to the technical field of suspension systems, in particular to an adjustable suspension system for a suction-type sewer scavenger, which comprises a connecting frame, a hinge frame is connected to the connecting frame, a knuckle is connected to the hinge frame, a fixed mounting plate is fixedly arranged on the knuckle, a support folded plate is fixedly mounted at the upper end of the fixed mounting plate, and the support folded plate is fixedly mounted at the lower end of the support folded plate. A damping cavity cylinder is fixedly installed on the supporting folded plate, external air outlet pipes are symmetrically arranged at the upper end and the lower end of the damping cavity cylinder, and by arranging a damping adjusting component, under driving of a driving motor, adjusting plug columns on the upper side and the lower side can stretch into the corresponding external air outlet pipes correspondingly; the size of the air outlet of the external air outlet pipe can be adjusted by adjusting the position of the adjusting plug column, the smaller the air outlet of the external air outlet pipe is, the larger the acting force for hindering air exhaust is, in this way, air damping can be achieved, then the damping strength can be adjusted, and applicability is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of suspension systems, in particular to an adjustable suspension system for a sewage suction vehicle. Background Art

[0002] ‌Sewage suction truck is a new type of sanitation vehicle used to collect, transfer, clean and transport sludge and sewage to avoid secondary pollution. ‌Sewage suction truck has the function of self-priming and self-draining, fast working speed, large capacity, convenient transportation, and is particularly suitable for collecting and transporting liquid substances such as feces, mud, crude oil, etc. This vehicle uses the domestically advanced vacuum pump for sewage suction trucks, which has strong suction power and long suction range. It is particularly suitable for suction, loading and unloading of silt in sewers, especially for sucking larger objects such as sewer mud, silt, stones, bricks, etc. The main functions of the suspension system include transmitting force and torque, buffering impact, attenuating vibration, supporting the vehicle body, improving riding experience, and ensuring smooth driving of the car. In the suspension system in the prior art, the shock absorption strength of the shock absorber is generally fixed, which is not convenient for adjusting the shock absorption strength, cannot meet the requirements of different tonnage vehicles and different driving environments, and has low applicability. Summary of the invention

[0003] The object of the present invention is to provide an adjustable suspension system for a sewage suction vehicle to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable suspension system for a sewage suction vehicle, comprising a connecting frame, an articulated frame is connected to the connecting frame, a steering knuckle is connected to the articulated frame, a fixed safety plate is fixedly arranged on the steering knuckle, a supporting folding plate is fixedly installed on the upper end of the fixed safety plate, a shock-absorbing cavity tube is fixedly installed on the supporting folding plate, external air outlet pipes are symmetrically arranged at the upper and lower ends of the shock-absorbing cavity tube, internal air outlet pipes are symmetrically arranged inside the shock-absorbing cavity tube, the external air outlet pipe is connected to the internal air outlet pipe, and a piston is slidably connected inside the shock-absorbing cavity tube. Push plate, a shock-absorbing adjustment component for adjusting the size of the air outlet of the external air outlet pipe is arranged on the shock-absorbing cavity tube, a stable shock-absorbing component is symmetrically arranged in the shock-absorbing cavity tube, a top buffer shock-absorbing component is arranged on the shock-absorbing adjustment component, a movable connecting column is fixedly connected to the upper end of the piston push plate, a connecting plate is fixedly installed on the upper end of the movable connecting column, a first buffer spring is fixedly installed on the upper end of the piston push plate, the upper end of the first buffer spring is fixedly installed on the top of the shock-absorbing cavity tube, the lower end of the piston push plate is fixedly connected to the second buffer spring, and the lower end of the second buffer spring is fixedly connected to the bottom of the shock-absorbing cavity tube.

[0005] Preferably, the shock-absorbing adjustment component includes a threaded main column, a fixed worm gear, a mating worm, a drive motor, a convex sliding support plate, a first rack plate, a connecting gear, a second rack plate, a top fixed plate, an adjusting plug and a fixed limit block. The threaded main column is rotatably connected to the upper end of the fixed safety plate, and the drive motor is fixedly installed on the upper end of the fixed safety plate.

[0006] Preferably, the mating worm is rotatably connected to the upper end of the fixed mounting plate through a support plate, one end of the mating worm is fixedly connected to the output end of the driving motor, the fixed worm wheel is fixedly connected to the threaded main column, the fixed worm wheel is meshed with the mating worm, and the convex sliding support plate is slidably connected to the supporting folding plate.

[0007] Preferably, the threaded main column passes through the convex sliding support plate and is threadedly connected to the convex sliding support plate, the upper end of the convex sliding support plate is fixedly connected to a first rack plate, the connecting gear is rotatably connected to the shock-absorbing cavity cylinder, the first rack plate is meshed with the connecting gear, the other side of the connecting gear is meshed with a second rack plate, and the upper end of the second rack plate is fixedly connected to a top fixed plate.

[0008] Preferably, the lower end of the top fixed plate and the upper end of the convex sliding support plate are fixedly connected with an adjusting plug that can extend into the external air outlet pipe, the number of the external air outlet pipe and the adjusting plug is the same, the adjusting plug is a conical column, the fixed limit block is fixedly connected to the shock-absorbing cavity cylinder, and the first rack plate and the second rack plate are both slidably connected to the shock-absorbing cavity cylinder through the fixed limit block.

[0009] Preferably, the stabilizing shock-absorbing component includes a fixed annular support plate, a fourth buffer spring, a fixed cylindrical plate, a stabilizing shock-absorbing column and a fixed connecting ring. The fixed annular support plate is fixedly installed on the internal air outlet pipe, the fourth buffer spring is fixedly connected to the fixed annular support plate, and the fourth buffer spring is fixedly connected to the fixed cylindrical plate at one end away from the fixed annular support plate.

[0010] Preferably, one end of the fixed cylindrical plate close to the internal air outlet pipe is fixedly connected with a stabilizing shock-absorbing column, and the stabilizing shock-absorbing column is a conical column. The stabilizing shock-absorbing column can extend into the internal air outlet pipe, and the fixed connecting ring is fixedly connected to the fixed cylindrical plate, and the fourth buffer spring is sleeved on the stabilizing shock-absorbing column.

[0011] Preferably, the top buffer shock-absorbing component includes a connecting annular plate, a sliding connecting column, a third buffer spring, a fixed ring cavity, an annular piston plate, an air guide tube and a buffer inflatable bag. The fixed ring cavity is fixedly installed on the upper end of the top fixed plate, and an annular piston plate is slidably connected in the fixed ring cavity. The upper end of the annular piston plate is fixedly connected to the sliding connecting column.

[0012] Preferably, the sliding connecting column slides through the fixed ring cavity, and the upper end of the sliding connecting column is fixedly connected to a connecting annular plate. The connecting annular plate and the fixed ring cavity are connected by a third buffer spring. The third buffer spring is sleeved on the sliding connecting column. The fixed ring cavity is connected with a plurality of air guiding tubes, and the upper ends of the plurality of air guiding tubes are respectively connected with buffer air bags, and the buffer air bags are fixedly installed on the upper end of the fixed ring cavity.

[0013] Preferably, the upper end of the movable connecting column passes through the shock-absorbing cavity tube, the top fixed plate, the fixed ring cavity and the connecting annular plate in sequence, and the movable connecting column is slidably connected to the top of the shock-absorbing cavity tube, and the top fixed plate, the fixed ring cavity and the connecting annular plate have no contact with the movable connecting column.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By providing a shock-absorbing adjustment component, under the drive of a driving motor, the upper and lower adjustment plugs can be respectively extended into the corresponding external air outlet pipes, and the size of the air outlet of the external air outlet pipe can be adjusted by adjusting the position of the adjustment plug. The smaller the air outlet of the external air outlet pipe, the greater the force that hinders the discharge of air. In this way, gas shock absorption can be achieved, and then the shock absorption intensity can be adjusted, thereby enhancing applicability.

[0015] By providing a top buffer and shock-absorbing component, when the connecting disk moves downward, it drives the connecting annular plate to move downward, and the connecting annular plate drives the sliding connecting column to move downward and squeezes the third buffer spring. When the annular piston plate moves downward, it squeezes the gas in the fixed ring cavity into the buffer air bag through the air guide tube, so that the buffer air bag expands. The expanded buffer air bag contacts the connecting annular plate, thereby achieving the function of supporting and buffering the connecting annular plate, thereby improving the shock-absorbing effect and improving the stability of the vehicle during driving.

[0016] By providing a stable shock-absorbing component, when the vibration generated by the vehicle drives the connecting plate and the movable connecting column to move downward, the movable connecting column drives the piston push plate to move downward in the shock-absorbing cavity tube. When the piston push plate moves downward, it squeezes the second buffer spring and stretches the first buffer spring. The piston push plate can discharge the gas in the shock-absorbing cavity tube through the internal air outlet pipe and the external air outlet pipe. When the piston push plate contacts the fixed cylindrical plate, it drives the fixed cylindrical plate to move to the side close to the internal air outlet pipe, the fourth buffer spring is squeezed, and the stable shock-absorbing column gradually extends into the internal air outlet pipe, so that the air outlet of the internal air outlet pipe gradually becomes smaller, and the resistance to the movement of the piston push plate gradually increases, so that the shock absorption is carried out smoothly, stable shock absorption is achieved, and the shock absorption effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0019] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the piston push plate installation structure of the present invention.

[0021] Figure 5 It is a schematic diagram of the internal structure of the shock-absorbing cavity tube of the present invention.

[0022] Figure 6 It is a schematic diagram of the overall structure of the stable shock absorbing component of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the stable shock absorbing component of the present invention.

[0024] Figure 8 It is a schematic diagram of the structure of the shock absorbing and adjusting component of the present invention.

[0025] Fig. 9 It is a schematic diagram of the partial structure of the shock absorbing and adjusting component of the present invention.

[0026] Fig.10 It is a schematic diagram of the external structure of the top buffer and shock absorbing component of the present invention.

[0027] Fig.11 It is a schematic diagram of the internal structure of the top buffer and shock absorbing component of the present invention.

[0028] Fig.12 It is a schematic structural diagram of another state of the top buffering and shock absorbing component of the present invention.

[0029] Fig.13 It is a diagram showing the structure of some components of the present invention.

[0030] In the figure: 1, connecting frame; 2, articulated frame; 3, steering knuckle; 4, fixed plate; 5, shock-absorbing cavity cylinder; 6, shock-absorbing adjustment member; 8, movable connecting column; 9, connecting plate; 10, top buffer shock-absorbing member; 11, stable shock-absorbing member; 12, piston push plate; 13, first buffer spring; 14, second buffer spring; 15, external air outlet pipe; 16, internal air outlet pipe; 17, supporting folding plate; 61, threaded main column; 62, fixed worm gear; 63, matching worm; 64, driving motor; 65, convex sliding support plate ; 66, first rack plate; 67, connecting gear; 68, second rack plate; 69, top fixed plate; 610, adjusting plug; 611, fixed limit block; 101, connecting annular plate; 102, sliding connecting column; 103, third buffer spring; 104, fixed ring cavity; 105, annular piston plate; 106, air guide tube; 107, buffer airbag; 111, fixed annular support plate; 112, fourth buffer spring; 113, fixed cylindrical plate; 114, stabilizing shock-absorbing column; 115, fixed connecting ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 13The present invention provides a technical solution: an adjustable suspension system for a sewage suction vehicle, comprising a connecting frame 1, an articulated frame 2 is connected to the connecting frame 1, a steering knuckle 3 is connected to the articulated frame 2, a fixed safety plate 4 is fixedly arranged on the steering knuckle 3, a support folding plate 17 is fixedly installed on the upper end of the fixed safety plate 4, a shock-absorbing cavity tube 5 is fixedly installed on the support folding plate 17, an external air outlet pipe 15 is symmetrically arranged at the upper and lower ends of the shock-absorbing cavity tube 5, an internal air outlet pipe 16 is symmetrically arranged inside the shock-absorbing cavity tube 5, the external air outlet pipe 15 is connected to the internal air outlet pipe 16, a piston push plate 12 is slidably connected inside the shock-absorbing cavity tube 5, a shock-absorbing adjustment component 6 for adjusting the size of the air outlet of the external air outlet pipe 15 is arranged on the shock-absorbing cavity tube 5, and the shock-absorbing cavity tube 5 has an air outlet. A stable shock-absorbing component 11 is symmetrically arranged, a top buffer shock-absorbing component 10 is arranged on the shock-absorbing adjustment component 6, a movable connecting column 8 is fixedly connected to the upper end of the piston push plate 12, a connecting plate 9 is fixedly installed on the upper end of the movable connecting column 8, a first buffer spring 13 is fixedly installed on the upper end of the piston push plate 12, the upper end of the first buffer spring 13 is fixedly installed on the top of the shock-absorbing cavity tube 5, a second buffer spring 14 is fixedly connected to the lower end of the piston push plate 12, and the lower end of the second buffer spring 14 is fixedly connected to the bottom of the shock-absorbing cavity tube 5. By setting the shock-absorbing adjustment component 6, under the drive of the driving motor 64, the adjusting plugs 610 on the upper and lower sides can be respectively extended into the corresponding external air outlet pipe 15, and the external air outlet pipe can be adjusted by adjusting the position of the adjusting plug 610 The size of the air outlet 15 can be adjusted. The smaller the air outlet of the external air outlet pipe 15 is, the greater the force that hinders the air discharge is. In this way, gas shock absorption can be achieved, and then the shock absorption strength can be adjusted, and the applicability is enhanced. By providing a top buffer shock absorbing component 10, when the connecting disk 9 moves downward, the connecting annular plate 101 is driven to move downward, and the connecting annular plate 101 drives the sliding connecting column 102 to move downward and squeeze the third buffer spring 103. When the annular piston sheet 105 moves downward, it squeezes the gas in the fixed ring cavity 104 into the buffer airbag 107 through the air guide pipe 106, so that the buffer airbag 107 expands. The expanded buffer airbag 107 contacts the connecting annular plate 101, achieving The connecting annular plate 101 is supported and buffered, thereby improving the shock absorption effect and the stability of the vehicle during driving. By providing a stable shock absorbing component 11, when the vibration generated by the vehicle drives the connecting plate 9 and the movable connecting column 8 to move downward, the movable connecting column 8 drives the piston push plate 12 to move downward in the shock absorbing cavity tube 5. When the piston push plate 12 moves downward, it squeezes the second buffer spring 14 and stretches the first buffer spring 13. The piston push plate 12 can discharge the gas in the shock absorbing cavity tube 5 through the internal air outlet pipe 16 and the external air outlet pipe 15. When the piston push plate 12 contacts the fixed cylindrical plate 113, it drives the fixed cylindrical plate 113 to move to the side close to the internal air outlet pipe 16, and the fourth buffer spring 112 is squeezed.The stable shock-absorbing column 114 gradually extends into the internal air outlet pipe 16, so that the air outlet of the internal air outlet pipe 16 gradually becomes smaller, and the resistance to the movement of the piston push plate 12 gradually increases, so that the shock absorption is carried out smoothly, and the stable shock absorption is achieved, and the shock absorption effect is improved.

[0033] The damping adjustment component 6 includes a threaded main column 61, a fixed worm wheel 62, a matching worm 63, a driving motor 64, a convex sliding support plate 65, a first rack plate 66, a connecting gear 67, a second rack plate 68, a top fixed plate 69, an adjustment plug 610 and a fixed limit block 611. The threaded main column 61 is rotatably connected to the upper end of the fixed safety plate 4, the driving motor 64 is fixedly installed on the upper end of the fixed safety plate 4, the matching worm 63 is rotatably connected to the upper end of the fixed safety plate 4 through a support plate, one end of the matching worm 63 is fixedly connected to the output end of the driving motor 64, the fixed worm wheel 62 is fixedly connected to the threaded main column 61, and the fixed worm wheel 62 is meshed with the matching worm 63. The convex sliding support plate 65 is slidably connected to the supporting folding plate 17, the threaded main column 61 penetrates the convex sliding support plate 65 and is threadedly connected to the convex sliding support plate 65, the upper end of the convex sliding support plate 65 is fixedly connected to the first rack plate 66, the connecting gear 67 is rotatably connected to the shock-absorbing cavity tube 5, the first rack plate 66 is meshed with the connecting gear 67, and the other side of the connecting gear 67 is meshed with the second rack plate 68, the upper end of the second rack plate 68 is fixedly connected to the top fixing plate 69, the lower end of the top fixing plate 69 and the upper end of the convex sliding support plate 65 are fixedly connected to the adjusting plug 610 that can be extended into the external air outlet pipe 15, and the number of the external air outlet pipe 15 and the adjusting plug 610 is the same The adjusting plug 610 is a conical column, and the fixed limit block 611 is fixedly connected to the shock-absorbing cavity tube 5. The first rack plate 66 and the second rack plate 68 are both slidably connected to the shock-absorbing cavity tube 5 through the fixed limit block 611. The driving motor 64 drives the matching worm 63 to rotate, and the matching worm 63 drives the fixed worm gear 62 to rotate. The fixed worm gear 62 drives the threaded main column 61 to rotate. The threaded main column 61 is threadedly connected with the convex sliding support plate 65. The rotation of the threaded main column 61 can drive the convex sliding support plate 65 to move upward on the supporting folding plate 17. The convex sliding support plate 65 drives the adjusting plug 610 thereon to extend into the external air outlet pipe 15 at the lower end of the shock-absorbing cavity tube 5. The size of the air outlet of the external air outlet pipe 15 can be adjusted, the convex sliding support plate 65 drives the first rack plate 66 to move upward, the first rack plate 66 drives the connecting gear 67 to rotate, the connecting gear 67 drives the second rack plate 68 to move downward, the second rack plate 68 drives the top fixed plate 69 to move downward, the top fixed plate 69 drives the adjusting plug 610 thereon to move downward and extend into the external air outlet pipe 15 at the upper end of the shock-absorbing cavity tube 5, which is used to adjust the size of the air outlet of the external air outlet pipe 15. The smaller the air outlet of the external air outlet pipe 15, the greater the force that hinders the discharge of air, so that gas shock absorption can be achieved, and then the shock absorption intensity can be adjusted.

[0034] The stable shock-absorbing component 11 includes a fixed annular support plate 111, a fourth buffer spring 112, a fixed cylindrical plate 113, a stable shock-absorbing column 114 and a fixed connecting ring 115. The fixed annular support plate 111 is fixedly installed on the internal air outlet pipe 16, and the fourth buffer spring 112 is fixedly connected to the fixed annular support plate 111. The end of the fourth buffer spring 112 away from the fixed annular support plate 111 is fixedly connected to the fixed cylindrical plate 113, and the end of the fixed cylindrical plate 113 close to the internal air outlet pipe 16 is fixedly connected to the stable shock-absorbing column 114. The stable shock-absorbing column 114 is a conical column arrangement, and the stable shock-absorbing column 114 can extend into the internal air outlet pipe 16. The fixed connecting ring 115 is fixedly connected to the fixed cylindrical plate 113, and the fourth buffer spring 112 is sleeved on the stable shock-absorbing column 114. When the vibration generated by the vehicle drives the connecting plate 9 and the movable connecting column 8 to move downward, the movable connecting column 8 drives the piston push plate 12 to shock-absorbing When the piston push plate 12 contacts the fixed cylindrical plate 113, it drives the fixed cylindrical plate 113 to move toward the side close to the internal air outlet pipe 16, and the fourth buffer spring 112 is squeezed. The stable shock-absorbing column 114 gradually extends into the internal air outlet pipe 16, so that the air outlet of the internal air outlet pipe 16 gradually becomes smaller, and the resistance to the movement of the piston push plate 12 gradually increases, so that the shock absorption is carried out smoothly, and the effect of gas shock absorption is achieved. When the movable connecting column 8 moves upward, the movable connecting column 8 drives the piston push plate 12 to squeeze the first buffer spring 13 and stretch the second buffer spring 14, and drives the upper stable shock-absorbing column 114 to extend into the upper internal air outlet pipe 16, thereby achieving stable shock absorption.

[0035] The top buffering and shock-absorbing component 10 includes a connecting annular plate 101, a sliding connecting column 102, a third buffer spring 103, a fixed ring cavity 104, an annular piston sheet 105, an air guide tube 106 and a buffer air bag 107. The fixed ring cavity 104 is fixedly installed on the upper end of the top fixed plate 69. The annular piston sheet 105 is slidably connected in the fixed ring cavity 104. The upper end of the annular piston sheet 105 is fixedly connected to the sliding connecting column 102. The sliding connecting column 102 slides through the fixed ring cavity 104. The upper end of the sliding connecting column 102 is fixedly connected to the connecting annular plate 101. The connecting annular plate 101 and the fixed ring cavity 104 are connected by the third buffer spring 103. The third buffer spring 103 is sleeved on the sliding connecting column 102. The fixed ring cavity 104 is connected with a plurality of air guide tubes 106. The upper ends of the plurality of air guide tubes 106 are respectively connected with buffer air bags 107. The buffer air bags 107 are fixedly installed The upper end of the fixed ring cavity 104 and the upper end of the movable connecting column 8 sequentially penetrate the shock-absorbing cavity tube 5, the top fixed plate 69, the fixed ring cavity 104 and the connecting annular plate 101. The movable connecting column 8 is slidably connected to the top of the shock-absorbing cavity tube 5. The top fixed plate 69, the fixed ring cavity 104 and the connecting annular plate 101 are not in contact with the movable connecting column 8. During the downward movement of the connecting plate 9, the connecting annular plate 101 is driven to move downward. The connecting annular plate 101 drives the sliding connecting column 102 to move downward and squeezes the third buffer spring 103. During the downward movement of the annular piston plate 105, the gas in the fixed ring cavity 104 is squeezed into the buffer airbag 107 through the air guide tube 106, so that the buffer airbag 107 expands. The expanded buffer airbag 107 contacts the connecting annular plate 101, thereby supporting and buffering the connecting annular plate 101, thereby improving the shock absorption effect.

[0036] When the vehicle is driving, when the vibration generated by the vehicle drives the connecting plate 9 and the movable connecting column 8 to move downward, the movable connecting column 8 drives the piston push plate 12 to move downward in the shock absorbing cavity tube 5. When the piston push plate 12 moves downward, it squeezes the second buffer spring 14 and stretches the first buffer spring 13. The piston push plate 12 can discharge the gas in the shock absorbing cavity tube 5 through the internal air outlet pipe 16 and the external air outlet pipe 15. When the piston push plate 12 contacts the fixed cylindrical plate 113, it drives the fixed cylindrical plate 113 to move to the side close to the internal air outlet pipe 16, the fourth buffer spring 112 is squeezed, and the stable shock absorbing column 114 gradually extends into the internal air outlet pipe 16, so that the air outlet of the internal air outlet pipe 16 The opening gradually becomes smaller, and the resistance to the movement of the piston push plate 12 gradually increases, so that the shock absorption is carried out smoothly, and the effect of gas shock absorption is achieved. When the movable connecting column 8 moves upward, the movable connecting column 8 drives the piston push plate 12 to squeeze the first buffer spring 13 and stretch the second buffer spring 14, and drives the upper stable shock absorption column 114 to extend into the upper internal air outlet pipe 16, so as to achieve stable shock absorption. In the process of the connecting plate 9 moving downward, it drives the connecting annular plate 101 to move downward, and the connecting annular plate 101 drives the sliding connecting column 102 to move downward and squeeze the third buffer spring 103. In the process of the annular piston sheet 105 moving downward, the gas in the fixed ring cavity 104 is passed through the gas guide pipe 10 6 is squeezed into the buffer airbag 107, so that the buffer airbag 107 expands. The expanded buffer airbag 107 contacts the connecting annular plate 101, thereby achieving the function of supporting and buffering the connecting annular plate 101, thereby improving the shock absorption effect. When it is necessary to adjust the shock absorption intensity, the driving motor 64 drives the matching worm 63 to rotate, the matching worm 63 drives the fixed worm gear 62 to rotate, the fixed worm gear 62 drives the threaded main column 61 to rotate, the threaded main column 61 is threadedly connected with the convex sliding support plate 65, the rotation of the threaded main column 61 can drive the convex sliding support plate 65 to move upward on the supporting folding plate 17, and the convex sliding support plate 65 drives the adjusting plug 610 thereon to extend into the lower end of the shock absorption cavity tube 5. In the external air outlet pipe 15, the size of the air outlet of the external air outlet pipe 15 can be adjusted, the convex sliding support plate 65 drives the first rack plate 66 to move upward, the first rack plate 66 drives the connecting gear 67 to rotate, the connecting gear 67 drives the second rack plate 68 to move downward, the second rack plate 68 drives the top fixed plate 69 to move downward, the top fixed plate 69 drives the adjusting plug 610 thereon to move downward and extend into the external air outlet pipe 15 at the upper end of the shock-absorbing cavity tube 5, which is used to adjust the size of the air outlet of the external air outlet pipe 15. The smaller the air outlet of the external air outlet pipe 15, the greater the force that hinders the discharge of air, so that gas shock absorption can be achieved, and then the shock absorption intensity can be adjusted, and the applicability is enhanced.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable suspension system for a sewage suction vehicle, comprising a connecting frame (1), an articulated frame (2) being connected to the connecting frame (1), and a steering knuckle (3) being connected to the articulated frame (2), characterized in that: A fixed safety plate (4) is fixedly arranged on the steering knuckle (3), a support folding plate (17) is fixedly arranged on the upper end of the fixed safety plate (4), a shock-absorbing cavity tube (5) is fixedly arranged on the support folding plate (17), external air outlet pipes (15) are symmetrically arranged at the upper and lower ends of the shock-absorbing cavity tube (5), an internal air outlet pipe (16) is symmetrically arranged inside the shock-absorbing cavity tube (5), the external air outlet pipe (15) and the internal air outlet pipe (16) are connected, a piston push plate (12) is slidably connected inside the shock-absorbing cavity tube (5), and a shock-absorbing adjustment component (6) for adjusting the size of the air outlet of the external air outlet pipe (15) is arranged on the shock-absorbing cavity tube (5). A stable shock absorbing component (11) is symmetrically arranged in the shock absorbing cavity tube (5); a top buffer shock absorbing component (10) is arranged on the shock absorbing adjustment component (6); a movable connecting column (8) is fixedly connected to the upper end of the piston push plate (12); a connecting plate (9) is fixedly installed on the upper end of the movable connecting column (8); a first buffer spring (13) is fixedly installed on the upper end of the piston push plate (12); the upper end of the first buffer spring (13) is fixedly installed on the top of the shock absorbing cavity tube (5); a second buffer spring (14) is fixedly connected to the lower end of the piston push plate (12); the lower end of the second buffer spring (14) is fixedly connected to the bottom of the shock absorbing cavity tube (5).

2. The adjustable suspension system for a sewage suction vehicle according to claim 1, characterized in that: The damping adjustment component (6) comprises a threaded main column (61), a fixed worm wheel (62), a matching worm (63), a driving motor (64), a convex sliding support plate (65), a first rack plate (66), a connecting gear (67), a second rack plate (68), a top fixed plate (69), an adjustment plug (610) and a fixed limit block (611), wherein the threaded main column (61) is rotatably connected to the upper end of the fixed safety plate (4), and the driving motor (64) is fixedly mounted on the upper end of the fixed safety plate (4).

3. The adjustable suspension system for a sewage suction vehicle according to claim 2, characterized in that: The mating worm (63) is rotatably connected to the upper end of the fixed mounting plate (4) via a support plate, one end of the mating worm (63) is fixedly connected to the output end of a drive motor (64), the fixed worm wheel (62) is fixedly connected to the threaded main column (61), the fixed worm wheel (62) is meshed with the mating worm (63), and the convex sliding support plate (65) is slidably connected to the supporting folding plate (17).

4. The adjustable suspension system for a sewage suction vehicle according to claim 3 is characterized in that: The threaded main column (61) passes through the convex sliding support plate (65) and is threadedly connected to the convex sliding support plate (65); a first rack plate (66) is fixedly connected to the upper end of the convex sliding support plate (65); the connecting gear (67) is rotatably connected to the shock-absorbing cavity tube (5); the first rack plate (66) is meshed with the connecting gear (67); a second rack plate (68) is meshed on the other side of the connecting gear (67); and a top fixing plate (69) is fixedly connected to the upper end of the second rack plate (68).

5. The adjustable suspension system for a sewage suction vehicle according to claim 4, characterized in that: The lower end of the top fixed plate (69) and the upper end of the convex sliding support plate (65) are both fixedly connected with an adjusting plug (610) that can extend into the external air outlet pipe (15); the external air outlet pipe (15) and the adjusting plug (610) are provided in the same number; the adjusting plug (610) is a conical column; the fixed limit block (611) is fixedly connected to the shock-absorbing cavity tube (5); and the first rack plate (66) and the second rack plate (68) are both slidably connected to the shock-absorbing cavity tube (5) via the fixed limit block (611).

6. The adjustable suspension system for a sewage suction vehicle according to claim 1, characterized in that: The stable shock absorbing component (11) comprises a fixed annular support plate (111), a fourth buffer spring (112), a fixed cylindrical plate (113), a stable shock absorbing column (114) and a fixed connecting ring (115); the fixed annular support plate (111) is fixedly mounted on the internal air outlet pipe (16); the fourth buffer spring (112) is fixedly connected to the fixed annular support plate (111); and one end of the fourth buffer spring (112) away from the fixed annular support plate (111) is fixedly connected to the fixed cylindrical plate (113).

7. The adjustable suspension system for a sewage suction vehicle according to claim 6, characterized in that: A stabilizing shock absorbing column (114) is fixedly connected to one end of the fixed cylindrical plate (113) close to the internal air outlet pipe (16); the stabilizing shock absorbing column (114) is a conical column and can extend into the internal air outlet pipe (16); the fixed connecting ring (115) is fixedly connected to the fixed cylindrical plate (113); and the fourth buffer spring (112) is sleeved on the stabilizing shock absorbing column (114).

8. The adjustable suspension system for a sewage suction vehicle according to claim 6, characterized in that: The top buffering and shock absorbing component (10) comprises a connecting annular plate (101), a sliding connecting column (102), a third buffer spring (103), a fixed ring cavity (104), an annular piston sheet (105), an air guide tube (106) and a buffering air bag (107); the fixed ring cavity (104) is fixedly mounted on the upper end of the top fixed plate (69); the fixed ring cavity (104) is slidably connected with the annular piston sheet (105); and the upper end of the annular piston sheet (105) is fixedly connected with the sliding connecting column (102).

9. The adjustable suspension system for a sewage suction vehicle according to claim 8, characterized in that: The sliding connecting column (102) slides through the fixed ring cavity (104); the upper end of the sliding connecting column (102) is fixedly connected to a connecting annular plate (101); the connecting annular plate (101) and the fixed ring cavity (104) are connected via a third buffer spring (103); the third buffer spring (103) is sleeved on the sliding connecting column (102); a plurality of air guide connecting tubes (106) are connected to the fixed ring cavity (104); the upper ends of the plurality of air guide connecting tubes (106) are respectively connected to buffer air bags (107); the buffer air bags (107) are fixedly mounted on the upper end of the fixed ring cavity (104).

10. The adjustable suspension system for a sewage suction vehicle according to claim 9, characterized in that: The upper end of the movable connecting column (8) passes through the shock-absorbing cavity tube (5), the top fixing plate (69), the fixed ring cavity (104) and the connecting annular plate (101) in sequence, and the movable connecting column (8) is slidably connected to the top of the shock-absorbing cavity tube (5), and there is no contact between the top fixing plate (69), the fixed ring cavity (104) and the connecting annular plate (101) and the movable connecting column (8).

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