A towed chassis double axle damping structure

Abstract

The utility model relates to the field of trailer chassis, disclose a kind of trailer chassis double-shaft damping structure, including chassis main body and connecting swing arm, the bottom of chassis main body is fixedly installed with leaf spring, the utility model has following advantages and effects: by the trailer chassis suspension damping component of being set, leaf spring is installed in the bottom of chassis main body by fixed bolt, and damper is rotatably installed above mounting block by rotating block and fixed bolt, leaf spring itself can be through elastic deformation absorption vertical direction vibration, but the impact buffering capacity of lateral, longitudinal is limited;And damper on both sides can pass through hydraulic or pneumatic damping effect, simultaneously suppress three directions vibration, especially can effectively reduce the high-frequency jolt caused by uneven road surface, avoid trailer body excessive shaking;Make leaf spring keep more stable motion trajectory when deforming, reduce the roll amplitude of chassis main body when turning or changing lane.

Description

Technical Field

[0001] This utility model relates to the field of trailer chassis technology, and in particular to a dual-axis shock absorption structure for trailer chassis. Background Technology

[0002] RVs are a type of fashionable vehicle imported from abroad. They are equipped with home-like facilities and integrate "clothing, food, housing, and transportation" into one, realizing the fashionable product of "living while traveling and traveling while living". Towable RVs are a type of RV. Unlike motorhomes, towable RVs do not have their own power and require an additional vehicle to tow them. In addition to driving on normal roads, RVs often travel or park on muddy, uneven, and high-slope roads in scenic areas, requiring suspension to provide shock absorption and protection.

[0003] Most existing trailer caravan chassis use a single trailing arm shock absorber structure, which results in poor comfort when driving on unpaved roads, low load-bearing capacity, almost no overloading, and low safety. Utility Model Content

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a dual-axis shock absorption structure for a trailer chassis, comprising a chassis body and a connecting swing arm, wherein a leaf spring is fixedly installed at the bottom of the chassis body, and a trailer chassis suspension shock absorption assembly is provided on the chassis body, the leaf spring and the connecting swing arm.

[0005] The trailer chassis suspension shock absorption assembly includes a fixing bolt, a connecting plate, a connecting block, a movable shaft, and a rotating connecting rod. The fixing bolt is threaded on the inner side of the leaf spring and the chassis body. The connecting plate is fixedly installed on one side of the connecting arm. The connecting block is fixedly installed on one side of the connecting plate and on the left and right sides of the leaf spring. The movable shaft is rotatably installed on the inner side of the connecting block. The rotating connecting rod is rotatably installed on the outer side of the two movable shafts.

[0006] Preferably, a fixing cylinder is fixedly installed at the four bottom corners of the chassis body, a sliding rod is slidably installed on the inner side of the fixing cylinder, and a towed chassis swing arm shock absorption assembly is provided on the leaf spring and the chassis body.

[0007] Preferably, the connecting swing arm is fixedly installed at the bottom of the slide rod, the connecting swing arm is L-shaped, and the bottom of the connecting swing arm has multiple threaded holes.

[0008] Preferably, the trailer chassis suspension shock absorption assembly further includes a spring body and a limiting slider. One end of the spring body is fixedly installed on the top inner wall of the fixed cylinder, the limiting slider is fixedly installed on the outer side of the other end of the spring body, and the slide rod is fixedly installed on the bottom of the limiting slider.

[0009] Preferably, the trailer chassis swing arm shock absorption assembly includes a mounting block, a fixed pin, a rotating block, and a damper. The mounting block is fixedly installed on one side of the chassis body and the leaf spring. The fixed pin is rotatably installed on the inner side of the mounting block. The rotating block is rotatably installed on the outer side of the fixed pin. The damper is fixedly installed between one side of the two rotating blocks.

[0010] Preferably, a limiting groove is provided at the bottom of the fixed cylinder, the slide rod is slidably installed on the inner side of the limiting groove, and the outer diameter of the limiting slider is larger than the inner diameter of the limiting groove.

[0011] By adopting the above technical solution, the limiting slide groove facilitates the guidance of the slide rod, allowing the connecting swing arm to move only up and down after being subjected to vibration, without any left and right shaking. In addition, the limiting slider prevents the slide rod from slipping out of the inside of the fixed cylinder.

[0012] Preferably, a connecting groove is provided on one side of both the connecting block and the rotating connecting rod, and the movable shaft fits into the connecting groove.

[0013] By adopting the above technical solution, the connecting groove allows the connecting block and the rotating connecting rod to be fixed by the movable shaft after they are connected, preventing them from detaching.

[0014] Preferably, both the mounting block and the rotating block have a movable groove on one side, and the fixed pin is rotatably mounted inside the movable groove.

[0015] By adopting the above technical solution, the movable slot facilitates the connection of the fixed pin, allowing the fixed pin to rotate and connect to the rotating block.

[0016] Preferably, the connecting block is U-shaped, and the outer side of the rotating connecting rod has an arc-shaped chamfer.

[0017] By adopting the above technical solution, the arc chamfer can prevent friction interference during the rotation of the rotating connecting rod, and the U-shape facilitates the installation and fixation of the rotating connecting rod.

[0018] Preferably, the chassis body is H-shaped.

[0019] By adopting the above technical solution, the I-shaped chassis body facilitates the installation and fixation of leaf springs and multiple fixing cylinders. Furthermore, when the chassis body is connected to the RV, reinforcing ribs can be added at the connection point to effectively improve stability.

[0020] The beneficial effects of this utility model are:

[0021] 1. This utility model uses a suspension shock absorption assembly for a trailer chassis. The leaf spring is installed at the bottom of the chassis body by fixing bolts, and the damper is rotatably installed above the mounting block by a rotating block and a fixing pin. The leaf spring itself can absorb vertical vibration through elastic deformation, but its ability to buffer lateral and longitudinal impacts is limited. The dampers on both sides can suppress vibration in three directions at the same time through hydraulic or pneumatic damping, which can effectively reduce high-frequency bumps caused by uneven road surfaces and prevent excessive swaying of the trailer body. It also makes the leaf spring maintain a more stable motion trajectory when deforming, reducing the lateral tilt of the chassis body when turning or changing lanes.

[0022] 2. This utility model features a trailer chassis swing arm shock absorption assembly with connecting blocks installed on both sides of the leaf spring. Multiple fixed cylinders are installed on the chassis body, and a spring body is installed above each fixed cylinder. The spring body is connected to the sliding rod via a limiting slider. The limiting slider is connected to the connecting block via the connecting swing arm and the connecting plate. A rotating connecting rod is rotatably connected to the inner side of the connecting block via a movable shaft. This allows the leaf spring to transmit the vibration force to the connecting swing arm after vibration, and the spring body can provide auxiliary shock absorption. The elastic buffering effect of the spring body can further attenuate the instantaneous impact force transmitted from the road surface to the chassis. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a dual-axis shock absorption structure for a trailer chassis proposed in this utility model.

[0025] Figure 2 This is a partial structural diagram of a dual-axis shock absorption structure for a trailer chassis proposed in this utility model.

[0026] Figure 3 This is a schematic diagram of the exploded portion of a dual-axis shock absorption structure for a trailer chassis proposed in this utility model.

[0027] Figure 4 This is a partial structural schematic diagram of the rotating block and damper proposed in this utility model.

[0028] In the diagram: 1. Trailer chassis suspension damping assembly; 2. Trailer chassis swing arm damping assembly; 3. Chassis body; 4. Leaf spring; 5. Fixed cylinder; 6. Slide rod; 7. Connecting swing arm;

[0029] 11. Fixing bolt; 12. Connecting plate; 13. Connecting block; 14. Movable shaft; 15. Rotating connecting rod; 16. Spring body; 17. Limiting slider;

[0030] 21. Mounting block; 22. Fixing pin; 23. Rotating block; 24. Damper. Detailed Implementation

[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a dual-axis shock absorption structure for a trailer chassis, including a chassis body 3 and a connecting swing arm 7. A leaf spring 4 is fixedly installed at the bottom of the chassis body 3, and a trailer chassis suspension shock absorption assembly 1 is provided on the chassis body 3, the leaf spring 4 and the connecting swing arm 7.

[0032] The trailer chassis suspension shock absorption assembly 1 includes a fixing bolt 11, a connecting plate 12, a connecting block 13, a movable shaft 14, and a rotating connecting rod 15. The fixing bolt 11 is threadedly installed on the inner side of the leaf spring 4 and the chassis body 3. The connecting plate 12 is fixedly installed on one side of the connecting swing arm 7. The connecting block 13 is fixedly installed on one side of the connecting plate 12 and on the left and right sides of the leaf spring 4. The movable shaft 14 is rotatably installed on the inner side of the connecting block 13. The rotating connecting rod 15 is rotatably installed on the outer side of the two movable shafts 14.

[0033] In this embodiment, a fixed cylinder 5 is fixedly installed at the four corners of the bottom of the chassis body 3, and a sliding rod 6 is slidably installed on the inner side of the fixed cylinder 5. A trailing chassis swing arm shock absorption assembly 2 is provided on the leaf spring 4 and the chassis body 3.

[0034] In this embodiment, the connecting arm 7 is fixedly installed at the bottom of the slide rod 6. The connecting arm 7 is L-shaped and has multiple threaded holes at its bottom.

[0035] In this embodiment, the towed chassis suspension shock absorption assembly 1 also includes a spring body 16 and a limiting slider 17. One end of the spring body 16 is fixedly installed on the top inner wall of the fixed cylinder 5, the limiting slider 17 is fixedly installed on the outer side of the other end of the spring body 16, and the slide rod 6 is fixedly installed on the bottom of the limiting slider 17.

[0036] In this embodiment, the trailer chassis swing arm shock absorber assembly 2 includes a mounting block 21, a fixing pin 22, a rotating block 23, and a damper 24. The mounting block 21 is fixedly installed on one side of the chassis body 3 and the leaf spring 4. The fixing pin 22 is rotatably installed on the inner side of the mounting block 21, and the rotating block 23 is rotatably installed on the outer side of the fixing pin 22. The damper 24 is fixedly installed between one side of the two rotating blocks 23. The leaf spring 4 is installed at the bottom of the chassis body 3 by fixing bolts 11, and the damper 24 is rotatably installed above the mounting block 21 by the rotating block 23 and the fixing pin 22. The leaf spring 4 itself can absorb vertical vibration through elastic deformation, but its ability to buffer lateral and longitudinal impacts is limited. The dampers 24 on both sides can suppress vibration in three directions at the same time through hydraulic or pneumatic damping, which can effectively reduce high-frequency bumps caused by uneven road surfaces and avoid excessive shaking of the trailer body.

[0037] In this embodiment, a limiting groove is provided at the bottom of the fixed cylinder 5, and the slide rod 6 is slidably installed on the inner side of the limiting groove. The outer diameter of the limiting slider 17 is larger than the inner diameter of the limiting groove. The elastic buffering effect of the spring body 16 can further attenuate the instantaneous impact force transmitted from the road surface to the chassis. For example, when the trailer passes through a gravel road or railway crossing, the spring first absorbs the impact energy through compression, and then the damper slowly releases it, reducing fatigue damage to the chassis frame and suspension system and extending the service life of chassis components.

[0038] In this embodiment, both the mounting block 21 and the rotating block 23 have a movable groove on one side, and the fixing pin 22 is rotatably installed inside the movable groove. The movable groove facilitates the connection between the mounting block 21 and the rotating block 23 through the fixing pin 22, and allows them to rotate after connection.

[0039] In this embodiment, the connecting block 13 is U-shaped, and the outer side of the rotating connecting rod 15 is provided with an arc-shaped chamfer. Connecting blocks 13 are also installed on both sides of the leaf spring 4. Multiple fixed cylinders 5 are installed on the chassis body 3. A spring body 16 is provided above each fixed cylinder 5. The spring body 16 is connected to the sliding rod 6 through the limiting slider 17. The limiting slider 17 can be connected to the connecting block 13 through the connecting swing arm 7 and the connecting plate 12. The inner side of the connecting block 13 is rotatably connected to the rotating connecting rod 15 through the movable shaft 14, which allows the leaf spring 4 to transmit the vibration force to the connecting swing arm 7 after vibration, and can also provide auxiliary shock absorption through the spring body 16.

[0040] In this embodiment, the chassis body 3 is I-shaped. The I-shaped chassis body 3 facilitates the installation and fixing of the leaf spring 4 and multiple fixing cylinders 5. When the chassis body 3 is connected to the RV, reinforcing ribs can be added at the connection point to effectively improve stability.

[0041] Specifically, the leaf spring 4 is installed at the bottom of the chassis body 3 using fixing bolts 11, and the damper 24 is rotatably installed above the mounting block 21 using rotating block 23 and fixing pin 22. The leaf spring 4 itself can absorb vertical vibration through elastic deformation, but its ability to buffer lateral and longitudinal impacts is limited. The dampers 24 on both sides can suppress vibrations in three directions simultaneously through hydraulic or pneumatic damping, especially effectively reducing high-frequency bumps caused by uneven road surfaces and preventing excessive shaking of the trailer body. This allows the leaf spring 4 to maintain a more stable trajectory when deformed, reducing the lateral tilt of the chassis body 3 when turning or changing lanes. Connecting blocks 13 are also installed on both sides of the leaf spring 4, and multiple fixing cylinders are installed on the chassis body 3. 5. A spring body 16 is provided above each fixed cylinder 5. The spring body 16 is connected to the slide rod 6 through the limiting slider 17. The limiting slider 17 is connected to the connecting block 13 through the connecting swing arm 7 and the connecting plate 12. The inner side of the connecting block 13 is rotatably connected to the rotating connecting rod 15 through the movable shaft 14, which allows the leaf spring 4 to transmit the vibration force to the connecting swing arm 7 after vibration. It can also provide auxiliary shock absorption through the spring body 16. The elastic buffering effect of the spring body 16 can further attenuate the instantaneous impact force transmitted from the road surface to the chassis. For example, when the trailer passes through a gravel road or railway crossing, the spring first absorbs the impact energy through compression, and then the damper slowly releases it, reducing fatigue damage to the chassis frame and suspension system and extending the service life of chassis components.

Claims

1. A dual-axle shock absorption structure for a trailer chassis, characterized in that, include: The chassis body (3) and the connecting swing arm (7) are provided with a leaf spring (4) fixedly installed at the bottom of the chassis body (3), and a tow chassis suspension shock absorption assembly (1) is provided on the chassis body (3), the leaf spring (4) and the connecting swing arm (7); The trailer chassis suspension shock absorption assembly (1) includes a fixing bolt (11), a connecting plate (12), a connecting block (13), a movable shaft (14), and a rotating connecting rod (15). The fixing bolt (11) is threaded on the inner side of the leaf spring (4) and the chassis body (3). The connecting plate (12) is fixedly installed on one side of the connecting swing arm (7). The connecting block (13) is fixedly installed on one side of the connecting plate (12) and on the left and right sides of the leaf spring (4). The movable shaft (14) is rotatably installed on the inner side of the connecting block (13). The rotating connecting rod (15) is rotatably installed on the outer side of the two movable shafts (14).

2. The dual-axle shock absorption structure for a trailer chassis according to claim 1, characterized in that, Fixed cylinders (5) are fixedly installed at the four corners of the bottom of the chassis body (3). Sliding rods (6) are slidably installed on the inner side of the fixed cylinders (5). Trailer chassis swing arm shock absorption components (2) are provided on the leaf spring (4) and the chassis body (3).

3. The dual-axle shock absorption structure for a trailer chassis according to claim 1, characterized in that, The connecting arm (7) is fixedly installed at the bottom of the slide rod (6). The connecting arm (7) is L-shaped and has multiple threaded holes at its bottom.

4. The dual-axle shock absorption structure for a trailer chassis according to claim 2, characterized in that, The trailer chassis suspension shock absorption assembly (1) also includes a spring body (16) and a limiting slider (17). One end of the spring body (16) is fixedly installed on the top inner wall of the fixed cylinder (5), and the limiting slider (17) is fixedly installed on the outer side of the other end of the spring body (16). The slide rod (6) is fixedly installed on the bottom of the limiting slider (17).

5. The dual-axle shock absorption structure for a trailer chassis according to claim 2, characterized in that, The trailer chassis swing arm damping assembly (2) includes a mounting block (21), a fixing pin (22), a rotating block (23), and a damper (24). The mounting block (21) is fixedly installed on one side of the chassis body (3) and the leaf spring (4). The fixing pin (22) is rotatably installed on the inner side of the mounting block (21). The rotating block (23) is rotatably installed on the outer side of the fixing pin (22). The damper (24) is fixedly installed between one side of the two rotating blocks (23).

6. The dual-axle shock absorption structure for a trailer chassis according to claim 4, characterized in that, The bottom of the fixed cylinder (5) is provided with a limiting groove, the slide rod (6) is slidably installed on the inner side of the limiting groove, and the outer diameter of the limiting slider (17) is larger than the inner diameter of the limiting groove.

7. The dual-axle shock absorption structure for a trailer chassis according to claim 1, characterized in that, The connecting block (13) and the rotating connecting rod (15) are both provided with connecting grooves on one side, and the movable shaft (14) fits into the connecting groove.

8. The dual-axle shock absorption structure for a trailer chassis according to claim 5, characterized in that, Both the mounting block (21) and the rotating block (23) have movable slots on one side, and the fixed pin (22) is rotatably installed inside the movable slot.

9. The dual-axle shock absorption structure for a trailer chassis according to claim 1, characterized in that, The connecting block (13) is U-shaped, and the outer side of the rotating connecting rod (15) is provided with an arc-shaped chamfer.

10. A dual-axle shock absorption structure for a trailer chassis according to claim 1, characterized in that, The chassis body (3) is shaped like an I-beam.

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