Light truck shock absorber

Abstract

The utility model discloses a light truck shock absorber, which relates to the technical field of light truck shock absorbers, is used as a linear adjusting structure to realize height adjustment and suspension adjustment of a seat, and has the advantages of meeting the requirement of low suspension travel of light trucks, light trucks and the like and improving the comfort of the seat. According to the technical scheme, the shock absorber is characterized by comprising a shock absorber upper frame and a shock absorber lower frame which are stacked in the vertical direction, the shock absorber upper frame and the shock absorber lower frame are connected through two oppositely-arranged supporting assemblies, and each supporting assembly comprises a scissor outer frame and a scissor inner frame which are combined to be in a scissor shape and are hinged in the center; one ends of the scissor inner frames and the scissor outer frames are hinged to the shock absorber upper frame, the other ends of the scissor inner frames and the scissor outer frames are slidably connected with the shock absorber lower frame, and a mounting seat is integrally arranged between the two scissor inner frames and movably connected with the lower support through an air spring. And a height adjusting valve assembly for controlling the air spring to inflate and deflate so as to lift the shock absorber upper frame is arranged between the shock absorber upper frame and the shock absorber lower frame.

Description

Technical Field

[0001] The utility model relates to the technical field of light truck shock absorbers, in particular to a light truck shock absorber. Background Art

[0002] Modern cars are no longer simply transportation vehicles; they are a combination of "people, vehicle, and environment." As the direct support system for vehicle occupants, seats play a crucial role in the interior of the cabin, integrating ergonomics, automotive design, industrial design, and aesthetics. Light truck seats are a crucial component of the vehicle's body. Their comfort is crucial in the vehicle's personalized design and is also integral to ensuring safety.

[0003] Light truck seats are generally composed of seat cushions, backrests, headrests, skins and frame assemblies. Light car seat frames are the basic structure of car seats and can be divided into four parts: backrest frame, seat cushion frame, seat pan and adjustment device (slide rails and recliners).

[0004] Due to limited seat height, light trucks, light trucks and passenger car seats do not have airbag shock-absorbing mechanisms. They only use elastic steel frames for shock absorption. Long-term use will cause the elastic steel frames to break, reducing the shock-absorbing effect of the car seats. The bumpy feeling is obvious, affecting the normal use of the car seats and the comfort is poor. Utility Model Content

[0005] In response to the above-mentioned technical deficiencies, the purpose of the present utility model is to provide a light truck shock absorber, which uses a linear adjustment structure to achieve seat height adjustment and suspension adjustment, and has the advantages of meeting the requirements of low suspension travel of light trucks, light trucks, etc. and improving seat comfort.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The utility model provides a light truck shock absorber, comprising a shock absorber upper frame and a shock absorber lower frame stacked in a vertical direction, the shock absorber upper frame and the shock absorber lower frame being connected by two relatively arranged support assemblies, the support assembly comprising a scissor outer frame and a scissor inner frame which are combined in a scissor shape and hinged at the center, the scissor inner frame and the scissor outer frame having one end hingedly connected to the shock absorber upper frame, and the other end being slidingly connected to the shock absorber lower frame, a mounting seat being integrated between the two scissor inner frames, the mounting seat and the lower support being movably connected by an air spring, and a height adjustment valve assembly for controlling the inflation and deflation of the air spring to realize the lifting and lowering of the shock absorber upper frame is provided between the shock absorber upper frame and the shock absorber lower frame.

[0008] By adopting the above technical solution, the seat is supported by the cooperation of the scissor inner frame, the scissor outer frame, the shock absorber upper frame and the shock absorber lower frame, so that the seat can move stably in the vertical direction. The mounting seat is supported by the air spring, and the inflation and deflation of the air spring are controlled by the height adjustment valve assembly to realize the lifting and lowering of the shock absorber upper frame. The height adjustment valve assembly is used as a linear adjustment structure, and cooperates with the scissor inner frame, the scissor outer frame, the shock absorber upper frame and the shock absorber lower frame to realize the height adjustment and suspension adjustment of the seat, which meets the requirements of low suspension travel of light trucks, light trucks, etc., reduces the bumpy feeling, and improves the comfort of the seat.

[0009] Preferably, the height adjustment valve assembly includes a valve body, a piston shaft is provided in the middle position of the inner cavity of the valve body, and a movable opening adapted to the piston shaft is opened at one end of the valve body facing the bracket, one end of the piston shaft passes through the valve body through the movable opening and is slidingly connected to the valve body, and a valve core is fixed at the other end. The valve body is provided with an air inlet pipe connected to an external air source, an air bag interface tube connected to an air spring, and an air discharge pipe for discharging the gas in the air spring, and the inner cavity of the valve body is provided with a control component that cooperates with the piston shaft and the valve core to control the flow of gas.

[0010] Preferably, the control assembly includes a head press-fitting frame, a middle press-fitting frame, an end cover and a tail press-fitting frame which are arranged in sequence along the center line of the valve body and are integrated with the valve body. The head press-fitting frame is sleeved outside the piston shaft and is slidably connected to the piston shaft. The middle press-fitting frame, the end cover and the tail press-fitting frame are sleeved outside the valve core and are slidably connected to the valve core. The inner cavity of the valve core is divided into an air intake chamber, an inflation chamber and an air deflation chamber by the piston shaft, the valve core, the head press-fitting frame, the middle press-fitting frame, the end cover and the tail press-fitting frame. The air intake pipe is connected to the air intake chamber, the airbag interface tube is connected to the inflation chamber, and the air deflation pipe is connected to the air deflation chamber. The middle press-fitting frame, the end cover and the tail press-fitting frame all leave a certain gap with the outer wall of the valve core and form a gap flow channel.

[0011] Preferably, the inner cavity of the air intake chamber is provided with a head press-fitting sealing ring located between the movable port and the head press-fitting frame and sleeved on the outside of the piston shaft, and the head press-fitting sealing ring closes the gap between the movable port, the piston shaft and the head press-fitting frame.

[0012] Preferably, a middle press-fitting sealing ring is provided between the middle press-fitting frame and the end cover, and is sleeved outside the valve core. The middle press-fitting sealing ring seals the gap between the valve core and the valve body. A tail press-fitting sealing ring is provided on the tail press-fitting frame, and is sleeved outside the valve core. The tail press-fitting sealing ring seals the gap between the valve core and the valve body.

[0013] Preferably, outer surfaces at both ends of the valve core have outer chamfers.

[0014] Preferably, a bracket is provided outside the valve body, a guide rail is fixed to the bracket on the side facing the valve body, a slideway adapted thereto is slidably connected to the guide rail, and the slideway is fixed to the valve body on the side facing away from the guide rail.

[0015] Preferably, an upper support is fixed at the middle position of the shock absorber upper frame, a lower support is fixed at the middle position of the shock absorber lower frame, the top end of the bracket is hinged to the upper support bolt, and the bottom end of the valve body is hinged to the shock absorber lower frame.

[0016] Preferably, a damper is disposed between the upper and lower shock absorber frames. The extended end of the damper is hingedly bolted to the upper support, and the bottom end of the damper is hingedly bolted to the lower shock absorber frame. The hinge point between the bracket and the upper support and the hinge point between the extended end of the damper and the upper support are coaxially arranged. The hinge point between the valve body and the lower shock absorber frame and the hinge point between the damper and the lower shock absorber frame are coaxially arranged. A connecting pipe A is integrally formed on the lower housing, connecting the inflation chamber and the inner cavity of the lower conduit.

[0017] The beneficial effects of the present invention are: the seat is supported by the cooperation of the scissor inner frame, the scissor outer frame, the shock absorber upper frame and the shock absorber lower frame, so that the seat can move stably in the vertical direction; the mounting seat is supported by the air spring, and the inflation and deflation of the air spring are controlled by the height adjustment valve assembly to realize the lifting and lowering of the shock absorber upper frame; the height adjustment valve assembly is used as a linear adjustment structure, which cooperates with the scissor inner frame, the scissor outer frame, the shock absorber upper frame and the shock absorber lower frame to realize the height adjustment and suspension adjustment of the seat, which meets the requirements of low suspension travel of light trucks, light trucks, etc. and improves the comfort of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0020] Figure 2 This is a schematic diagram of the overall top view of the structure of this embodiment;

[0021] Figure 3 This is a schematic diagram showing the structure of the outer frame of the scissors in this embodiment;

[0022] Figure 4 This is a schematic diagram of the overall explosion structure of this embodiment;

[0023] Figure 5 This is a schematic diagram showing the structure of the bracket in this embodiment;

[0024] Figure 6 This is a schematic structural diagram of the guide rail according to the present embodiment;

[0025] Figure 7 This is a schematic structural diagram of a cross-section of the valve body of this embodiment;

[0026] Figure 8 This is a schematic structural diagram of the air intake chamber of this embodiment;

[0027] Figure 9 This is a structural diagram of the valve body explosion in this embodiment.

[0028] Description of reference numerals:

[0029] In the figure: 1. Slide rail; 101. Slider; 2. Shock absorber lower frame; 3. Shock absorber upper frame; 4. Support assembly; 401. Scissor outer frame; 402. Scissor inner frame; 403. Outer crossbar; 404. Inner crossbar; 5. Slide; 6. Upper support; 7. Lower support; 8. Damper; 9. Bracket; 10. Height adjustment valve assembly; 1001. Valve body; 1001-1. Upper valve body; 1001-2. Lower valve body; 1002. Piston shaft; 1003. Movable port; 1004. Valve core; 1005. Head press-fitting frame; 1 006, middle press-fit frame; 1007, end cover; 1008, tail press-fit frame; 1009, air intake chamber; 1010, inflation chamber; 1011, deflation chamber; 1012, air intake pipe; 1013, airbag interface pipe; 1014, deflation pipe; 1015, muffler; 1016, head press-fit sealing ring; 1017, middle press-fit sealing ring; 1018, tail press-fit sealing ring; 1019, outer chamfer; 11, mounting seat; 12, air spring; 13, guide rail; 14, slide; 15, tilt adjustment frame. DETAILED DESCRIPTION

[0030] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0031] A light truck shock absorber, such as Figure 1-9, including two oppositely arranged slide rails 1 fixed on the carriage, each slide rail 1 is slidably connected to a slider 101, and a shock absorber lower frame 2 slidably connected to the slide rail 1 is fixed on the side of the two sliders 101 facing away from the slide rail 1. An electric push rod is provided on the carriage to control the movement of the shock absorber lower frame 2. The electric push rod provides power to drive the shock absorber lower frame 2 connected to the extended end of the electric push rod to move, thereby driving the seat to move. The slide rail 1 and the slider 101 cooperate to guide the movement of the shock absorber lower frame 2, making it convenient to adjust the seat position.

[0032] like Figure 1 and Figure 2 and Figure 3 and Figure 4 The shock absorber upper frame 3 is arranged directly above the shock absorber lower frame 2. The shock absorber upper frame 3 and the shock absorber lower frame 2 are connected by two oppositely arranged support assemblies 4. The support assembly 4 includes a scissors outer frame 401 and a scissors inner frame 402 that are combined in a scissors shape. The adjacent scissors inner frames 402 are hinged to the center of the scissors outer frame 401. The ends of the two scissors outer frames 401 are fixedly connected by two outer cross bars 403, and the ends of the two scissors inner frames 402 are fixed by two inner cross bars 404. The two scissors outer frames 401 and the two outer cross bars 403 as well as the two scissors inner frames 402 and the two inner cross bars 404 are all integrated into a square frame structure.

[0033] like Figure 2 and Figure 3 and Figure 4 , sliding grooves 5 are provided on both sides of the inner walls of the shock absorber lower frame 2 and the shock absorber upper frame 3, one of the inner cross bars 404 at the bottom has two ends entering the sliding groove 5 of the shock absorber lower frame 2 and is slidably connected to the shock absorber lower frame 2, and the other inner cross bar 404 at the top has two ends hingedly connected to the shock absorber upper frame 3, one of the outer cross bars 403 at the top has two ends entering the sliding groove 5 of the shock absorber upper frame 3 and is slidably connected to the shock absorber upper frame 3, and the other outer cross bar 403 at the bottom has two ends hingedly connected to the shock absorber lower frame 2, and the seat is supported by the cooperation of the scissors inner frame 402, the inner cross bar 404, the scissors outer frame 401, the outer cross bar 403, the shock absorber upper frame 3 and the shock absorber lower frame 2, so that the seat can move stably in the vertical direction.

[0034] like Figure 2 and Figure 3 and Figure 4, an upper support 6 is fixed at the middle position of the shock absorber upper frame 3, and a lower support 7 is fixed at the middle position of the shock absorber lower frame 2. A damper 8 is arranged between the shock absorber upper frame 3 and the shock absorber lower frame 2, and the extended end of the damper 8 is hinged to the upper support 6 with bolts, and the bottom end of the damper 8 is hinged to the shock absorber lower frame 2 with bolts. The damper 8 is an existing structure, so it will not be described in detail here. A bracket 9 is arranged on the side of the damper 8 between the shock absorber upper frame 3 and the shock absorber lower frame 2, and the top of the bracket 9 is hinged to the upper support 6 with bolts, and the hinge point of the bracket 9 and the upper support 6 and the hinge point of the extended end of the damper 8 and the upper support 6 are coaxially arranged. A height adjustment valve assembly 10 is provided on the bracket 9, and a mounting seat 11 is integrated between the two scissors inner frames 402. The mounting seat 11 and the lower support 7 are movably connected by an air spring 12.

[0035] like Figure 2 and Figure 3 and Figure 4 By adjusting the valve assembly 10 to provide power, the external air source is controlled to inflate or deflate the air spring 12, thereby driving one of the inner cross bars 404 and the outer cross bar 403 to slide on the shock absorber upper frame 3 and the shock absorber lower frame 2, thereby realizing the seat lifting.

[0036] like Figure 2 and Figure 3 and Figure 4 The height adjustment valve assembly 10 includes a valve body 1001 with a hollow inner cavity. The end of the valve body 1001 away from the bracket 9 is hingedly connected to the lower frame 2 of the shock absorber. The hinge connection point between the valve body 1001 and the lower frame 2 of the shock absorber and the hinge connection point between the damper 8 and the lower frame 2 of the shock absorber are coaxially arranged.

[0037] like Figure 5 and Figure 6 and Figure 7 and Figure 8 and Figure 9 A piston shaft 1002 is provided in the middle position of the inner cavity of the valve body 1001, and a movable opening 1003 adapted to the piston shaft 1002 is opened at one end of the valve body 1001 facing the bracket 9. One end of the piston shaft 1002 passes through the valve body 1001 through the movable opening 1003 and is slidingly connected to the valve body 1001, and a valve core 1004 is fixed at the other end. The center line of the valve core 1004 and the piston shaft 1002 coincides with the center line of the valve body 1001, and the diameter of the valve core 1004 is larger than the diameter of the piston shaft 1002.

[0038] like Figure 5 and Figure 6 and Figure 7 and Figure 8 and Figure 9The inner cavity of the valve body 1001 is arranged with a head press-fitting frame 1005, a middle press-fitting frame 1006, an end cover 1007 and a tail press-fitting frame 1008 which are integrated with the valve body 1001 in sequence along the center line direction of the valve body 1001. The head press-fitting frame 1005 is sleeved on the outside of the piston shaft 1002 and is slidably connected to the piston shaft 1002. The head press-fitting frame 1005 plays a guiding and supporting role in the movement of the piston shaft 1002. The middle press-fitting frame 1006, the end cover 1007 and the tail press-fitting frame 1008 are sleeved on the outside of the valve core 1004 and are slidably connected to the valve core 1004. The middle press-fitting frame 1006, the end cover 1007 and the tail press-fitting frame 1008 play a guiding and supporting role in the movement of the valve core 1004.

[0039] like Figure 5 and Figure 6 and Figure 7 and Figure 8 and Figure 9 The inner cavity of the valve core 1004 is divided into an air intake chamber 1009, an inflation chamber 1010 and a deflation chamber 1011 by the piston shaft 1002, the valve core 1004, the head press-fitting frame 1005, the middle press-fitting frame 1006, the end cover 1007 and the tail press-fitting frame 1008. The valve core 1004 is provided with an air intake pipe 1012 connected to the air intake chamber 1009, and the air intake pipe 1012 is connected to an external air source. The valve core 1004 is also provided with an air bag interface pipe 1013 connected to the inflation chamber 1010, and the air bag interface pipe 1013 is connected to the air spring 12. The valve core 1004 is provided with a deflation pipe 1014 connected to the deflation chamber 1011, and the deflation pipe 1014 is provided with a muffler 1015.

[0040] like Figure 5 and Figure 6 and Figure 7 and Figure 8 and Figure 9 The air inlet chamber 1009 is provided with a head press-fitting sealing ring 1016 located between the movable port 1003 and the head press-fitting frame 1005 and sleeved on the outside of the piston shaft 1002. The head press-fitting sealing ring 1016 closes the gap between the movable port 1003, the piston shaft 1002 and the head press-fitting frame 1005 without affecting the sliding of the piston shaft 1002. A valve core 1004 is provided between the middle press-fitting frame 1006 and the end cover 1007. The middle press-fitted sealing ring 1017 outside the valve core 1004 seals the gap between the valve core 1004 and the valve body 1001 without affecting the sliding of the valve core 1004 and the piston shaft 1002. The tail press-fitted frame 1008 is provided with a tail press-fitted sealing ring 1018 which is sleeved on the outside of the valve core 1004. The tail press-fitted sealing ring 1018 closes the gap between the valve core 1004 and the valve body 1001 without affecting the sliding of the valve core 1004.

[0041] like Figure 5 and Figure 6 and Figure 7 and Figure 8 and Figure 9 In the initial state, through the cooperation of the head press-fitted sealing ring 1016, the middle press-fitted sealing ring 1017, the tail press-fitted sealing ring 1018, the valve core 1004 and the piston shaft 1002, the air chambers in the air intake chamber 1009, the inflation chamber 1010 and the deflation chamber 1011 are balanced and not connected to each other. The head press-fitted frame 1005, the middle press-fitted frame 1006, the end cover 1007 and the tail press-fitted frame 1008 support the valve core 1004 and the piston shaft 1002 and guide the movement of the valve core 1004 and the piston shaft 1002.

[0042] like Figure 5 and Figure 6 and Figure 7 and Figure 8 and Figure 9 In order to make the air intake chamber 1009, the inflation chamber 1010 and the deflation chamber 1011 interconnected so as to facilitate the inflation and deflation of the air spring 12, the outer surfaces of both ends of the valve core 1004 have outer chamfers 1019, and the middle press-fitting frame 1006, the end cover 1007, and the tail press-fitting frame 1008 all have a certain gap with the outer wall of the valve core 1004 and form a gap flow channel. The gap between the end cover 1007 and the valve core 1004 is slightly larger than the gap between the middle press-fitting frame 1006 and the valve core 1004.

[0043] like Figure 5 and Figure 6 and Figure 7 and Figure 8 and Figure 9 When the outer chamfer 1019 position of one end of the valve core 1004 enters the inner cavity of the end cover 1007 and the non-outer chamfer 1019 position of the valve core 1004 does not contact the middle press-fit sealing ring 1017, the outer chamfer 1019 position of the other end of the valve core 1004 enters the deflation chamber 1011, and the tail press-fit sealing ring 1018 closes the gap between the valve core 1004 and the valve body 1001. At this time, the air intake chamber 1009 and the inflation chamber 1010 are connected, and the inflation chamber 1010 is not connected to the deflation chamber 1011. The gas entering the inflation chamber 1010 passes through the inflation chamber 1010 and the airbag interface tube 1013 in the flow direction and enters the air spring 12, thereby realizing the upward movement of the seat.

[0044] like Figure 5 and Figure 6 and Figure 7 and Figure 8 and Figure 9When the outer chamfer 1019 at the other end of the valve core 1004 enters the inner cavity of the tail press-fitting frame 1008 and the non-chamfered position of the valve core 1004 does not contact the tail press-fitting sealing ring 1018, the middle press-fitting sealing ring 1017 closes the gap between the valve core 1004 and the valve body 1001. At this time, the inflation chamber 1010 is connected to the deflation chamber 1011, and the gas in the air spring 12 passes through the airbag interface tube 1013, the inflation chamber 1010, and the deflation chamber 1011 in the flow direction, and is discharged through the deflation pipe 1014. A pull wire for controlling the movement of the piston shaft 1002 is provided on the seat. This is an existing structure and can be any existing mechanism that drives the piston shaft 1002 to move, so it will not be described in detail here.

[0045] like Figure 5 and Figure 6 and Figure 9 A guide rail 13 is fixed to the side of the bracket 9 facing the valve body 1001, and a slide 14 adapted to it is slidably connected to the guide rail 13. The slide 14 is fixed to the valve body 1001 on the side away from the guide rail 13. When the pneumatic spring is inflated, the upper frame 3 of the shock absorber rises, and the valve body 1001 and the bracket 9 produce relative displacement. The cooperation between the guide rail 13 and the slide 14 plays a guiding and supporting role in the movement of the bracket 9.

[0046] like Figure 9 The valve body 1001 is composed of an upper valve body 1001-1 and a lower valve body 1001-2 of an integrated structure. The air inlet pipe 1012 is connected to the upper valve body 1001-1, and the airbag interface pipe 1013 and the air release port are connected to the lower valve body 1001-2.

[0047] like Figure 1 and Figure 2 and Figure 4 A tilting frame 15 is installed outside the shock absorber upper frame 3, and the tilting frame 15 is connected to the seat on the side away from the shock absorber upper frame 3.

[0048] When in use, the user sits on the seat and needs to raise the seat height, the staff controls the movement of the piston shaft 1002, and the movement of the piston shaft 1002 drives the valve core 1004 with its integrated structure to move, and the outer chamfer 1019 position of one end of the valve core 1004 enters the inner cavity of the end cover 1007 and the non-outer chamfer 1019 position of the valve core 1004 does not contact the middle press-fit sealing ring 1017, and the outer chamfer 1019 position of the other end of the valve core 1004 enters the deflation chamber 1011, and the tail press-fit sealing ring 1018 closes the gap between the valve core 1004 and the valve body 1001. At this time, the air intake chamber 1009 and The inflation chamber 1010 is connected, and the inflation chamber 1010 is not connected to the deflation chamber 1011. An external air source enters the air inlet chamber 1009 and the inflation chamber 1010 through the air inlet pipe 1012. The gas entering the inflation chamber 1010 inflates the air spring 12 through the airbag interface tube 1013. After the air spring 12 is inflated, it drives one of the inner cross bars 404 and the outer cross bar 403 to slide on the shock absorber upper frame 3 and the shock absorber lower frame 2. The scissor inner frame 402 and the scissor outer frame 401 rotate, thereby realizing the upward movement of the seat. At the same time, the shock absorber upper frame 3 rises, and the valve body 1001 and the bracket 9 produce relative displacement;

[0049] When the seat height needs to be lowered, the control piston shaft 1002 moves in the opposite direction, the outer chamfer 1019 at the other end of the valve core 1004 enters the inner cavity of the tail press-fit frame 1008 and the non-chamfered position of the valve core 1004 does not contact the tail press-fit sealing ring 1018. The middle press-fit sealing ring 1017 closes the gap between the valve core 1004 and the valve body 1001. At this time, the inflation chamber 1010 is connected to the deflation chamber 1011, and the gas in the air spring 12 enters the inflation chamber 1010 through the airbag interface tube 1013 along the flow direction. The gas in the inflation chamber 1010 enters the deflation chamber 1011 and is discharged through the deflation pipe 1014, and the noise is reduced by the muffler 1015.

[0050] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A light truck shock absorber, characterized in that: The invention comprises a shock absorber upper frame (3) and a shock absorber lower frame (2) stacked in a vertical direction, wherein the shock absorber upper frame (3) and the shock absorber lower frame (2) are connected via two supporting assemblies (4) arranged opposite to each other, wherein the supporting assembly (4) comprises a scissor outer frame (401) and a scissor inner frame (402) which are combined in a scissor shape and hinged at the center, wherein one end of the scissor inner frame (402) and the scissor outer frame (401) are hingedly connected to the shock absorber upper frame (3), and the other end is slidingly connected to the shock absorber lower frame (2), a mounting seat (11) is integrated between the two scissor inner frames (402), and the mounting seat (11) and the lower support (7) are movably connected via an air spring (12), and a height adjustment valve assembly (10) for controlling the inflation and deflation of the air spring (12) to achieve the lifting and lowering of the shock absorber upper frame (3) is provided between the shock absorber upper frame (3) and the shock absorber lower frame (2).

2. A light truck shock absorber according to claim 1, characterized in that: The height adjustment valve assembly (10) includes a valve body (1001), a piston shaft (1002) is provided in the middle position of the inner cavity of the valve body (1001), a movable opening (1003) adapted to the piston shaft (1002) is opened at one end of the valve body (1001) facing the bracket (9), one end of the piston shaft (1002) passes through the valve body (1001) through the movable opening (1003) and is slidably connected to the valve body (1001), and a valve core (1004) is fixed to the other end, and the valve body (1001) is provided with an air inlet pipe (1012) connected to an external air source, an air bag interface pipe (1013) connected to an air spring (12), and an air discharge pipe (1014) for discharging the air in the air spring (12), and the inner cavity of the valve body (1001) is provided with a control component that cooperates with the piston shaft (1002) and the valve core (1004) to control the flow of gas.

3. A light truck shock absorber according to claim 2, characterized in that: The control assembly comprises a head press-fitting frame (1005), a middle press-fitting frame (1006), an end cover (1007) and a tail press-fitting frame (1008) which are sequentially arranged along the center line of the valve body (1001) and are integrated with the valve body (1001). The head press-fitting frame (1005) is sleeved on the outside of the piston shaft (1002) and is slidably connected to the piston shaft (1002). The middle press-fitting frame (1006), the end cover (1007) and the tail press-fitting frame (1008) are sleeved on the outside of the valve core (1004) and are slidably connected to the valve core (1004). The inner cavity of the valve core (1004) is connected to the piston shaft (1002), the valve core (1002) and the end cover (1007). 04), the head press-fitting frame (1005), the middle press-fitting frame (1006), the end cover (1007) and the tail press-fitting frame (1008) are divided into an air intake chamber (1009), an air inflation chamber (1010) and an air deflation chamber (1011), the air intake pipe (1012) is connected to the air intake chamber (1009), the air bag interface pipe (1013) is connected to the air inflation chamber (1010), and the air deflation pipe (1014) is connected to the air deflation chamber (1011), and the middle press-fitting frame (1006), the end cover (1007) and the tail press-fitting frame (1008) all leave a certain gap with the outer wall of the valve core (1004) and form a gap flow channel.

4. A light truck shock absorber according to claim 3, characterized in that: The inner cavity of the air inlet chamber (1009) is provided with a head press-fitting sealing ring (1016) located between the movable port (1003) and the head press-fitting frame (1005) and sleeved on the outside of the piston shaft (1002). The head press-fitting sealing ring (1016) closes the gap between the movable port (1003), the piston shaft (1002) and the head press-fitting frame (1005).

5. A light truck shock absorber as claimed in claim 3, characterized in that: A middle press-fitting sealing ring (1017) is provided between the middle press-fitting frame (1006) and the end cover (1007) and is sleeved on the outside of the valve core (1004). The middle press-fitting sealing ring (1017) seals the gap between the valve core (1004) and the valve body (1001). A tail press-fitting sealing ring (1018) is provided on the tail press-fitting frame (1008) and is sleeved on the outside of the valve core (1004). The tail press-fitting sealing ring (1018) closes the gap between the valve core (1004) and the valve body (1001).

6. A light truck shock absorber according to claim 2, characterized in that: The outer surfaces of both ends of the valve core (1004) have outer chamfers (1019).

7. A light truck shock absorber as claimed in claim 2, characterized in that: A bracket (9) is provided outside the valve body (1001), and a guide rail (13) is fixed to the bracket (9) on the side facing the valve body (1001), and a slideway (14) adapted thereto is slidably connected to the guide rail (13), and the slideway (14) is fixed to the valve body (1001) on the side facing away from the guide rail (13).

8. A light truck shock absorber according to claim 7, characterized in that: An upper support (6) is fixed at the middle position of the shock absorber upper frame (3), a lower support (7) is fixed at the middle position of the shock absorber lower frame (2), the top end of the bracket (9) is hingedly connected to the upper support (6) by bolts, and the bottom end of the valve body (1001) is hingedly connected to the shock absorber lower frame (2).

9. A light truck shock absorber according to claim 8, characterized in that: A damper (8) is provided between the shock absorber upper frame (3) and the shock absorber lower frame (2), the extended end of the damper (8) is hinged to the upper support (6) by bolts, the bottom end of the damper (8) is hinged to the shock absorber lower frame (2) by bolts, the hinge point between the bracket (9) and the upper support (6) and the hinge point between the extended end of the damper (8) and the upper support (6) are coaxially arranged, and the hinge connection point between the valve body (1001) and the shock absorber lower frame (2) and the hinge connection point between the damper (8) and the shock absorber lower frame (2) are coaxially arranged.

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