A middle and heavy truck bumper support

Abstract

The utility model relates to the field of automobile parts discloses a middle and heavy truck bumper support, including support main part, buffer assembly, adjustable installation component and anti -loose fixed component, the support main part is L type board -like structure, including the vertical plate department for with middle and heavy truck frame detachable connection and the horizontal plate department for with middle and heavy truck bumper detachable connection, the buffer assembly is embedded between the horizontal plate department and middle and heavy truck bumper. The utility model has the advantages and effects that: through the throttling effect of damping liquid in the damping cylinder, the elastic deformation of buffer spring and the elastic support of shock absorbing bent plate, form triple buffering structure, can effectively absorb the impact force and driving vibration, reduce the damage risk of bumper and frame, the sliding block can slide along the long hole, realize the fine adjustment with the frame connection position, adapt the installation size difference of different models middle and heavy truck, reduce the spare parts category, reduce the purchase cost.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a bumper bracket for medium and heavy-duty trucks. Background Technology

[0002] As core transportation tools for freight and engineering operations, medium and heavy trucks often operate in complex road conditions (such as construction sites and mountain roads). As a key component that protects the front structure of the vehicle body and absorbs the impact of collisions, the bumper needs to be stably connected to the vehicle frame through the bumper bracket.

[0003] Existing bumper brackets for medium and heavy-duty trucks are mostly rigid connection structures. When a vehicle experiences a low-speed collision or travels on a bumpy road, the impact force on the bumper is directly transmitted to the chassis, which can easily lead to bumper deformation, bracket breakage, and even fatigue damage at the chassis connection. Furthermore, the distance between the chassis and the bumper varies among different models of medium and heavy-duty trucks. The fixing holes of existing brackets are mostly non-adjustable, making it difficult to adapt to the installation needs of various vehicle models and increasing the cost of component universality. Therefore, we propose a new bumper bracket for medium and heavy-duty trucks to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a bumper bracket for medium and heavy trucks to solve the problems of poor impact resistance and low installation adaptability of existing brackets.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a medium and heavy truck bumper bracket, comprising a bracket body, a buffer assembly, an adjustable mounting assembly, and an anti-loosening fixing assembly. The bracket body is an L-shaped plate structure, comprising a vertical plate portion for detachable connection with a medium and heavy truck frame and a horizontal plate portion for detachable connection with a medium and heavy truck bumper. The buffer assembly is embedded between the horizontal plate portion and the medium and heavy truck bumper. The adjustable mounting assembly is disposed on the vertical plate portion. The anti-loosening fixing assembly is disposed between the horizontal plate portion and the medium and heavy truck bumper. The buffer assembly includes a damping cylinder welded to the horizontal plate, the damping cylinder being filled with damping fluid, a squeezing disc slidably fitted inside the damping cylinder, a damping ring fixedly fitted on the outer side of the squeezing disc, the damping ring being slidably fitted inside the damping cylinder, multiple damping holes being opened at the top of the squeezing disc, a moving column being fixedly connected to the top of the squeezing disc, a buffer plate being fixedly connected to the top of the moving column, and a buffer rubber pad being fixedly connected to the top of the buffer plate. The buffer assembly also includes an externally threaded cylinder fixedly fitted on the top of the damping cylinder, an adjusting nut being threaded on the outer side of the externally threaded cylinder, and a buffer spring being movably fitted between the adjusting nut and the buffer plate, the buffer spring being fitted on the outer side of the moving column.

[0006] By adopting the above technical solution, the preload of the buffer spring can be changed by rotating the adjusting nut according to the vehicle's load requirements. The preload is reduced when unloaded and increased when heavily loaded. When the bumper is impacted, the buffer rubber pad first absorbs some energy, the buffer plate pushes the moving column downward, the extrusion plate squeezes the damping fluid through the damping hole to generate damping force, and the damping ring slides downward to generate damping force. At the same time, the buffer spring compresses and stores energy, and the shock-absorbing plate deforms elastically. The triple buffering effect significantly reduces the transmission of impact force. After the impact disappears, the rebound of the buffer spring and the shock-absorbing plate drives the buffer assembly to reset, and the damping fluid flows in reverse to achieve a smooth reset.

[0007] A further feature of this invention is that four rotating handles are fixedly connected to the outer side of the adjusting nut.

[0008] By adopting the above technical solution, the rotary handle is evenly distributed in a ring, which makes it easy for the operator to manually rotate the adjusting nut to change the preload of the buffer spring and realize the adaptive adjustment of the buffer force, such as the difference in buffer requirements under no-load and heavy-load conditions.

[0009] A further feature of this invention is that a rubber sealing ring is fixedly sleeved on the top of the damping cylinder, and the movable column is slidably sleeved within the rubber sealing ring and the external threaded cylinder.

[0010] By adopting the above technical solution, the rubber sealing ring can prevent the damping fluid from leaking from the gap between the damping cylinder and the moving column, while reducing frictional noise when the moving column slides.

[0011] A further feature of this invention is that the buffer assembly further includes two shock-absorbing curved plates welded to the top of the horizontal plate, and both shock-absorbing curved plates are fixedly connected to the bottom of the buffer plate.

[0012] By adopting the above technical solution, the shock-absorbing bending plate is made of spring steel, which has a certain elastic deformation capacity. It can form a multi-buffered structure with the damping cylinder and buffer spring, thereby improving the overall energy absorption effect and enhancing the support stability of the buffer plate.

[0013] A further feature of this invention is that the anti-loosening fixing component includes an anti-loosening screw, an anti-slip washer, and an anti-loosening nut. The top of the bumper of the medium-heavy truck has two upper holes, and the top of the cross plate has two lower holes. The anti-loosening screw passes through the upper holes and the lower holes. The anti-loosening nut is threaded onto the outside of the anti-loosening screw, and the anti-slip washer is movably abutted against the bottom of the cross plate and the anti-loosening nut.

[0014] By adopting the above technical solution, the anti-slip pad is a metal pad with a toothed surface, which can increase the friction with the cross plate and the anti-loosening nut. Combined with the self-locking thread structure of the anti-loosening nut, it can effectively prevent the connection from loosening due to vibration.

[0015] A further feature of this invention is that two sliding holes are provided on the top of both the buffer rubber pad and the buffer plate, and two anti-loosening screws are respectively slidably sleeved in the corresponding sliding holes.

[0016] By adopting the above technical solution, the diameter of the sliding hole is slightly larger than the diameter of the anti-loosening screw, providing space for the up and down buffering movement of the buffer plate and the buffer rubber pad, and avoiding interference of the anti-loosening screw with the movement of the buffer assembly.

[0017] A further feature of this invention is that the adjustable mounting assembly includes two elongated holes on one side of the vertical plate, a slider is slidably fitted inside the elongated holes, and a threaded hole for cooperating with a bolt is provided on one side of the slider.

[0018] By adopting the above technical solution, the position of the threaded hole can be adjusted by sliding the slider in the elongated hole, thereby adapting to the mounting hole spacing of different frames and improving the versatility of the bracket.

[0019] A further feature of this invention is that: a limiting groove is provided on both the upper and lower inner walls of the elongated hole, and a limiting block is slidably sleeved in the limiting groove, with the two limiting blocks respectively fixedly connected to the upper and lower surfaces of the slider.

[0020] By adopting the above technical solution, the cooperation between the limiting block and the limiting groove can prevent the slider from falling out of the elongated hole, while ensuring the straightness of the slider when sliding and improving the installation positioning accuracy.

[0021] A further feature of this invention is that the support body is made of Q355 steel, and the surface of the support body is coated with a zinc-nickel alloy. The corners of the vertical plate and the horizontal plate of the support body are provided with arc transition sections.

[0022] By adopting the above technical solutions, Q355 steel has a high yield strength of ≥355MPa, which can meet the structural strength requirements under heavy load conditions. The zinc-nickel alloy coating thickness of ≥8μm can achieve a salt spray resistance of more than 1000 hours, which significantly improves the corrosion resistance. The rounded transition section can reduce stress concentration at the corner and avoid cracks after long-term use.

[0023] The beneficial effects of this utility model are: 1. The buffer assembly of this utility model forms a triple buffer structure through the throttling effect of the damping fluid in the damping cylinder (the cooperation of the extrusion plate, damping ring and damping hole), the elastic deformation of the buffer spring and the elastic support of the shock-absorbing plate. It can effectively absorb the impact force of collision and driving vibration, reduce the risk of damage to the bumper and frame. Furthermore, by rotating the adjusting nut to change the preload of the buffer spring, the buffer stiffness can be adjusted according to the vehicle load, driving conditions and other factors, adapting to different working conditions and improving the flexibility of use.

[0024] 2. The slider of the adjustable mounting component of this utility model can slide along the elongated hole to achieve fine adjustment of the connection position with the vehicle frame, adapt to the different installation dimensions of different models of medium and heavy trucks, reduce the types of parts, and reduce procurement costs.

[0025] 3. The combination structure of the anti-loosening screw, anti-loosening nut and anti-slip washer of this utility model, combined with the sliding hole design to avoid interference of buffer movement, can effectively prevent the connection from loosening due to vibration and ensure the long-term stable connection between the bumper and the bracket. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a structural schematic diagram of a medium-heavy truck bumper bracket proposed in this utility model; Figure 2 This is a cross-sectional view of a medium-heavy truck bumper bracket proposed in this utility model; Figure 3 for Figure 2 A schematic diagram of the structure of part A; Figure 4 for Figure 2 A structural diagram of section B; Figure 5 for Figure 2 A structural diagram of part C.

[0028] In the diagram, 1. Support body; 11. Horizontal plate; 12. Vertical plate; 2. Medium and heavy truck bumper; 3. Anti-loosening fixing component; 31. Lower hole; 32. Anti-loosening screw; 33. Anti-loosening nut; 34. Anti-slip pad; 4. Buffer component; 41. Buffer rubber pad; 42. Buffer plate; 43. Moving column; 44. Damping cylinder; 45. Damping fluid; 46. Extrusion plate; 47. Damping ring; 48. Damping hole; 49. Adjusting nut; 410. Rubber sealing ring; 411. External threaded cylinder; 412. Rotary handle; 413. Buffer spring; 414. Vibration damping bent plate; 5. Adjustable mounting component; 51. Long hole; 52. Slider; 53. Limiting block; 54. Threaded hole; 55. Limiting groove; 6. Upper hole. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] See Figure 1 — Figure 5 This utility model provides a bumper bracket for medium and heavy trucks. The main body 1 of the bracket is made of 6mm thick Q355 steel plate by stamping. The radius of the arc at the corner of the vertical plate 12 and the horizontal plate 11 is 20mm. The surface is treated with zinc-nickel alloy electroplating with a coating thickness of 10μm.

[0031] In the buffer assembly 4, the damping cylinder 44 is a seamless steel pipe with a diameter of 50mm, welded to the center of the horizontal plate 11, and filled with methyl silicone oil damping liquid 45. The extrusion plate 46 is a 4mm thick steel plate. The outer damping ring 47 is made of nitrile rubber, and several damping holes 48 (4-8 holes) are evenly opened on the top. The moving column 43 is a round steel, and its top is welded to the buffer plate 42 (which is a steel plate). The buffer rubber pad 41 is made of natural rubber and is fixed to the top of the buffer plate 42 through a vulcanization process.

[0032] The external threaded cylinder 411 is welded and fixed to the damping cylinder 44. Four rotating handles 412 are welded to the outside of the adjusting nut 49. The buffer spring 413 is a cylindrical helical spring with a diameter of 8mm. The rubber sealing ring 410 at the top of the damping cylinder 44 is made of fluororubber to ensure the damping fluid is sealed. The two shock-absorbing bending plates 414 are made of 65Mn spring steel with a bending angle of 120°. The upper and lower ends are welded to the horizontal plate 11 and the buffer plate 42, respectively.

[0033] In the anti-loosening fixing component 3, the anti-loosening screw 32 is a high-strength bolt of M12×80mm, the anti-loosening nut 33 is a Spirax thread structure, the anti-slip washer 34 is a carbon steel washer with diamond-shaped teeth on the surface, and the buffer rubber pad 41 and the sliding hole on the buffer plate 42 ensure that the anti-loosening screw 32 does not interfere with the buffer movement.

[0034] The adjustable mounting component 5 has a long slot 51 with a length of 150mm and a width of 20mm. The slider 52 is a 40×40×10mm Q355 steel block, and the threaded hole 54 is M16. The limiting groove 55 has a depth of 5mm, and the limiting block 53 has a thickness of 5mm, which is welded and fixed to the slider 52.

[0035] In this utility model, during installation, the position of the slider 52 in the elongated hole 51 is adjusted according to the mounting hole position of the frame. The vertical plate 12 is fixed to the frame by screwing the bolt into the threaded hole 54. The anti-loosening screw 32 passes through the upper hole 6 of the bumper 2, the sliding hole of the buffer component 4, and the lower hole 31 of the horizontal plate 11. The anti-loosening nut 33 is screwed in and the anti-slip pad 34 is pressed. Due to the setting of the anti-loosening screw 32, the anti-loosening nut 33 and the anti-slip pad 34, the anti-loosening effect is better, and the bumper is prevented from falling off. According to the vehicle load requirements, the preload of the buffer spring 413 is changed by rotating the handle 412 to adjust the nut 49. The preload is reduced when unloaded and increased when heavily loaded.

[0036] When the bumper 2 is impacted, the buffer rubber pad 41 first absorbs some of the energy, the buffer plate 42 pushes the moving column 43 downward, the extrusion plate 46 squeezes the damping fluid 45 through the damping hole 48 to generate damping force, at the same time the buffer spring 413 compresses to store energy and the shock-absorbing bending plate 414 elastically deforms, the triple buffering effect significantly reduces the transmission of impact force; after the impact disappears, the rebound of the buffer spring 413 and the shock-absorbing bending plate 414 drives the buffer assembly 4 to reset, and the damping fluid 45 flows in the opposite direction to achieve a smooth reset.

[0037] The bracket in this embodiment can withstand an impact load of 10kN without permanent deformation, has a buffer stroke of 30mm, and the connection parts remain loose after 1 million vibration tests. It is suitable for the bumper installation needs of various medium and heavy trucks.

Claims

1. A bumper bracket for medium and heavy-duty trucks, characterized in that, The system includes a support body (1), a buffer assembly (4), an adjustable mounting assembly (5), and an anti-loosening fixing assembly (3). The support body (1) is an L-shaped plate structure, including a vertical plate (12) for detachable connection with the frame of a medium- or heavy-duty truck and a horizontal plate (11) for detachable connection with the bumper (2) of the medium- or heavy-duty truck. The buffer assembly (4) is embedded between the horizontal plate (11) and the bumper (2). The adjustable mounting assembly (5) is located on the vertical plate (12). The anti-loosening fixing assembly (3) is located between the horizontal plate (11) and the bumper (2). The buffer assembly (4) includes... A damping cylinder (44) is welded to the horizontal plate (11). The damping cylinder (44) is filled with damping fluid (45). A squeezing disc (46) is slidably sleeved inside the damping cylinder (44). A damping ring (47) is fixedly sleeved on the outside of the squeezing disc (46). The damping ring (47) is damping and slidably sleeved inside the damping cylinder (44). A plurality of damping holes (48) are opened on the top of the squeezing disc (46). A moving column (43) is fixedly connected to the top of the squeezing disc (46). A buffer plate (42) is fixedly connected to the top of the moving column (43). A buffer rubber pad (41) is fixedly connected to the top of the buffer plate (42).

2. The bumper bracket for medium and heavy trucks according to claim 1, characterized in that: The buffer assembly (4) further includes an external threaded cylinder (411) fixedly sleeved on the top of the damping cylinder (44). An adjusting nut (49) is threaded on the outer side of the external threaded cylinder (411). The same buffer spring (413) is movably sleeved between the adjusting nut (49) and the buffer plate (42). The buffer spring (413) is sleeved on the outer side of the moving column (43).

3. The bumper bracket for medium and heavy trucks according to claim 2, characterized in that: Four rotating handles (412) are fixedly connected to the outside of the adjusting nut (49).

4. A bumper bracket for medium and heavy trucks according to claim 2, characterized in that: The top of the damping cylinder (44) is fixedly fitted with a rubber sealing ring (410), and the movable column (43) is slidably fitted inside the rubber sealing ring (410) and the external threaded cylinder (411).

5. A bumper bracket for medium and heavy-duty trucks according to claim 1, characterized in that: The buffer assembly (4) also includes two damping bends (414) welded to the top of the cross plate (11), and both damping bends (414) are fixedly connected to the bottom of the buffer plate (42).

6. A bumper bracket for medium and heavy-duty trucks according to claim 1, characterized in that: The anti-loosening fixing component (3) includes an anti-loosening screw (32), an anti-slip pad (34), and an anti-loosening nut (33). The top of the heavy-duty truck bumper (2) has two upper holes (6), and the top of the horizontal plate (11) has two lower holes (31). The anti-loosening screw (32) passes through the upper holes (6) and the lower holes (31). The anti-loosening nut (33) is threaded on the outside of the anti-loosening screw (32). The anti-slip pad (34) is movably abutted between the bottom of the horizontal plate (11) and the anti-loosening nut (33).

7. A medium-heavy truck bumper bracket according to claim 6, characterized in that: The top of both the buffer rubber pad (41) and the buffer plate (42) has two sliding holes, and the two anti-loosening screws (32) are respectively slidably sleeved in the corresponding sliding holes.

8. A bumper bracket for medium and heavy-duty trucks according to claim 1, characterized in that: The adjustable mounting assembly (5) includes two elongated holes (51) on one side of the vertical plate (12), and a slider (52) is slidably fitted inside the elongated holes (51). A threaded hole (54) for cooperating with a bolt is provided on one side of the slider (52).

9. A medium-heavy truck bumper bracket according to claim 8, characterized in that: Limiting grooves (55) are provided on the upper and lower inner walls of the elongated hole (51). Limiting blocks (53) are slidably sleeved in the limiting grooves (55), and the two limiting blocks (53) are fixedly connected to the upper and lower surfaces of the slider (52) respectively.

10. A bumper bracket for medium and heavy-duty trucks according to claim 1, characterized in that: The support body (1) is made of Q355 steel and has a zinc-nickel alloy coating on its surface. The corners of the vertical plate (12) and horizontal plate (11) of the support body (1) are provided with arc transition sections.

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