Automobile chassis side beam cushion block

Abstract

The utility model relates to an automobile chassis side beam cushion block, including cushion block body and connecting bolt, the cushion block body is passed down and is provided with a ladder hole, the small diameter section of ladder hole allows the stem of connecting bolt to pass and does not allow the head of connecting bolt to pass, the large diameter section of ladder hole allows the head of connecting bolt to pass, the stem of connecting bolt is connected with the prefabricated thread hole of automobile chassis side beam, the cushion block body is pasted with automobile chassis side beam. The utility model effectively protects chassis rust -resistant layer, significantly reduces the operating risk, and has the advantages that the support is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a side beam pad for automotive chassis. Background Technology

[0002] In automotive repair, maintenance, or tire replacement, lifting equipment such as jacks is often needed to lift the vehicle chassis off the ground. Currently, the standard lifting support point for most passenger vehicles is located on a downward-protruding skirt structure on the outer side of the chassis side beam. While this design saves space and cost, it presents the following significant technical defects and safety hazards in practical applications:

[0003] 1. The skirt structure is usually narrow and hidden, and is not easily distinguishable from other parts of the chassis. Especially in poor lighting or when the chassis is dirty, it is difficult for maintenance personnel to quickly and accurately identify the correct lifting support point. If the jack is to be accurately aligned with the skirt structure, the position of the jack needs to be constantly adjusted, which is time-consuming, laborious and inconvenient to operate.

[0004] 2. Due to the difficulty in identifying the side skirt structure and the narrow support surface, repair personnel are very likely to place the jack support arm in the wrong chassis position, such as on body panels, fuel tank guards, exhaust pipes, oil pans, or other non-load-bearing structures. Such misalignment can lead to minor issues like deformation and dents in body panels, and damage to chassis components such as plastic guards, oil lines, and wiring harnesses. In severe cases, it may damage critical components such as cracked oil pans and deformed exhaust pipes, resulting in unnecessary repair costs and vehicle damage.

[0005] 3. The support arm of a jack is usually made of metal and may have a rough surface, directly contacting the anti-rust paint on the chassis skirt. During lifting, the support arm rubs and is squeezed against the paint, easily scratching or even peeling off large areas of the anti-rust coating. Once the paint is damaged, the metal substrate is directly exposed to harsh environments such as moisture and salt, which will quickly corrode. Over time, the corrosion will weaken the metal strength in the support area, seriously threatening the vehicle's structural safety and service life.

[0006] 4. The narrow skirt structure provides a very limited contact area for the jack. During lifting, especially when the ground is uneven, the jack is not completely vertical, or the vehicle is slightly shaking, the jack support arm is very likely to slip off the narrow skirt. Once slippage occurs, the vehicle in the lifting position will fall instantly. This may not only cause serious damage to expensive vehicle parts such as the suspension and chassis, but also pose a fatal threat to personnel operating under or around the vehicle. It is a major safety hazard in the repair shop.

[0007] In summary, the existing technology that relies on the chassis raised skirt structure as the lifting support point has many defects. It not only increases the difficulty and risk of maintenance and reduces work efficiency, but also poses a serious threat to the structural safety of the vehicle and the safety of personnel. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the technical problem to be solved by this patent application is how to provide a car chassis side beam pad that effectively protects the chassis anti-rust layer, significantly reduces operational risks, and provides stable and reliable support.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] A side beam pad for a car chassis includes a pad body and a connecting bolt. The pad body has a stepped hole through it. The small-diameter section of the stepped hole allows the shank of the connecting bolt to pass through but does not allow the head of the connecting bolt to pass through. The large-diameter section of the stepped hole allows the head of the connecting bolt to pass through. The shank of the connecting bolt is connected to a pre-drilled threaded hole in the side beam of the car chassis. The pad body is fitted to the side beam of the car chassis.

[0011] In this way, the pad body is installed by mating with the connecting bolts through a stepped hole structure. The small-diameter section of the stepped hole restricts the bolt head from sinking, while the large-diameter section provides space for the head. After the connecting bolts are tightened into the pre-drilled threaded holes in the chassis, the pad body completely fits against the lower surface of the chassis side beam. The lifting force is evenly transferred to the entire chassis side beam structure through the pad body, avoiding localized stress concentration; the pad isolates the metal bolts from the external environment, reducing the risk of corrosion of the chassis threaded holes. Specifically, the dimensions of the pad body can be selected as 110mm x 41mm x 30mm.

[0012] As an optimization, one end of the pad body has two positioning posts, which are symmetrically arranged on both sides of the stepped hole. The two positioning posts are respectively inserted into the pre-positioned holes of the side beam of the automobile chassis.

[0013] In this way, the pad body extends with two symmetrical positioning posts, which are inserted into the pre-drilled positioning holes on the chassis. The dual positioning posts forcefully define a unique installation angle, preventing the pad from being installed backwards or offset; during lifting, the lateral force is shared by the positioning posts, significantly reducing the bolt shear load; maintenance personnel can complete precise installation without visual alignment, even by blind operation.

[0014] As an optimization, the pad body is provided with eight bottom hollow areas, and a bottom reinforcing rib is formed between every two adjacent bottom hollow areas.

[0015] In this way, the bottom of the pad has 8 hollow areas. The hollow structure reduces the amount of material used and lowers the unsprung mass of the whole vehicle; the reinforcing rib network forms a "grid-shaped" load-bearing frame, which improves the vertical load-bearing stiffness; the hollow channels prevent the accumulation of mud and water, and extend the service life of the pad.

[0016] As an optimization, the pad body is provided with several circumferentially hollowed-out areas, and a lateral reinforcing rib is formed between every two adjacent circumferentially hollowed-out areas.

[0017] In this way, the lateral reinforcing ribs resist the torsional load when the lifting arm shifts, preventing the pad block from cracking; the lateral hollow areas eliminate the internal stress of injection molding, reducing the product deformation rate. There are 66 lateral hollows, saving material while meeting the rigid load-bearing requirements.

[0018] As an optimization, the thickness of the bottom reinforcing rib is greater than that of the side reinforcing rib.

[0019] This allows for targeted enhancement of vertical load-bearing capacity.

[0020] As an optimization, the depth of the large-diameter section of the stepped hole is greater than the height of the bolt head.

[0021] In this way, the bolt head is sunk into the large-diameter section of the stepped hole, avoiding collision with the bolt head when the jack is lifted.

[0022] As an optimization, the pad body is injection molded from plastic material.

[0023] In this way, the plastic material completely eliminates the problem of metal corrosion and is suitable for salt spray and humid environments; the polymer material absorbs the impact and vibration of the lifting process, reducing the probability of abnormal noises; and it blocks the conductive path between the vehicle body and the lifting equipment to prevent static sparks.

[0024] As an optimization, the positioning post and the pad block body are integrally injection molded.

[0025] This eliminates the risk of loosening of the modular positioning pins, ensuring they remain functional for life; the mold forming process ensures minimal verticality error of the positioning pins, improving assembly sealing; and the elimination of secondary processing / assembly steps for the positioning pins reduces the manufacturing cost per unit.

[0026] In summary, compared with traditional technologies, the automotive chassis side beam pad of this utility model has the following significant advantages:

[0027] 1. The pad block body is injection molded from PA6+GF engineering plastic. The synergistic design with the bottom / circumferential hollow reinforcing rib structure reduces the weight of the parts while forming a grid-like mechanical transmission path, which improves the vertical load-bearing stiffness, meets the load-bearing requirements of the lift for the support point, and completely avoids the deformation risk caused by traditional metal skirt support.

[0028] 2. The plastic material fundamentally isolates the metal chassis from electrochemical contact with the external environment. Salt spray tests have verified that it can resist the corrosion of sodium chloride solution, eliminating the problem of rust and perforation caused by scratches on the paint surface during traditional lifting operations, and extending the chassis life.

[0029] 3. The integrated positioning column and the stepped hole countersunk bolts ensure minimal flatness error after the pad is installed. The lift support arm aligns with the pad body plane, eliminating the risk of oil pan and pipeline damage caused by support misalignment.

[0030] 4. The stepped hole countersunk head design allows the bolt head to be fully embedded inside the pad, eliminating the risk of jack slippage; the lateral reinforcing ribs provide shear strength, avoiding the risk of personal injury from lifting collapse.

[0031] 5. Four pads are symmetrically distributed at the chassis mechanical nodes for each vehicle. During lifting, the load is evenly distributed to the main structure of the side beam through the reinforcing rib network, reducing local pressure and avoiding the torsional deformation of the side beam caused by traditional single-point support. This improves lifting stability and avoids unnecessary damage to other areas. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a car chassis side beam pad block according to the present invention.

[0033] Figure 2 for Figure 1 A schematic diagram showing the disassembly of the main body and the connecting bolts.

[0034] Figure 3 for Figure 2 A schematic diagram of the bottom structure.

[0035] Figure 4 This is a schematic diagram showing the fit between the vehicle chassis side beam pad and the vehicle chassis side beam.

[0036] Figure 5 This is a schematic diagram of the side beam of the automobile chassis in this scheme. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0038] like Figure 1-5As shown, a car chassis side beam pad includes a pad body 1 and a connecting bolt 11. The pad body has a stepped hole 12 through it. The small diameter section of the stepped hole allows the shank of the connecting bolt to pass through but does not allow the head of the connecting bolt to pass through. The large diameter section of the stepped hole allows the head of the connecting bolt to pass through. The shank of the connecting bolt is connected to a pre-drilled threaded hole 13 of the car chassis side beam 20. The pad body fits against the car chassis side beam.

[0039] In this way, the pad body is installed by mating with the connecting bolts through a stepped hole structure. The small-diameter section of the stepped hole restricts the bolt head from sinking, while the large-diameter section provides space for the head. After the connecting bolts are tightened into the pre-drilled threaded holes in the chassis, the pad body completely fits against the lower surface of the chassis side beam. The lifting force is evenly transferred to the entire chassis side beam structure through the pad body, avoiding localized stress concentration; the pad isolates the metal bolts from the external environment, reducing the risk of corrosion of the chassis threaded holes. Specifically, the dimensions of the pad body can be selected as 110mm x 41mm x 30mm.

[0040] In practice, one end of the pad block body has two positioning posts 14, which are symmetrically arranged on both sides of the stepped hole. The two positioning posts are respectively inserted into the pre-positioned holes 15 of the side beam of the automobile chassis.

[0041] In this way, the pad body extends with two symmetrical positioning posts, which are inserted into the pre-drilled positioning holes on the chassis. The dual positioning posts forcefully define a unique installation angle, preventing the pad from being installed backwards or offset; during lifting, the lateral force is shared by the positioning posts, significantly reducing the bolt shear load; maintenance personnel can complete precise installation without visual alignment, even by blind operation.

[0042] Specifically, one of the two pre-set positioning holes can be set as an oblong hole to increase the error tolerance and facilitate easier installation.

[0043] In practice, the pad body is provided with eight bottom hollow areas 16, and a bottom reinforcing rib 17 is formed between every two adjacent bottom hollow areas.

[0044] Specifically, the bottom of the pad has eight hollowed-out areas. The hollowed-out structure reduces the amount of material used and lowers the unsprung mass of the vehicle. The reinforcing rib network forms a "grid-shaped" load-bearing frame, which improves the vertical load-bearing stiffness. The hollowed-out channels prevent the accumulation of mud and water, extending the service life of the pad.

[0045] In practice, the pad block body is provided with several circumferential hollow areas 18, and a lateral reinforcing rib 19 is formed between every two adjacent circumferential hollow areas.

[0046] In this way, the lateral reinforcing ribs resist the torsional load when the lifting arm shifts, preventing the pad block from cracking; the lateral hollow areas eliminate the internal stress of injection molding, reducing the product deformation rate. There are 66 lateral hollows, saving material while meeting the rigid load-bearing requirements.

[0047] In practice, the thickness of the bottom reinforcing rib is greater than that of the side reinforcing rib.

[0048] This allows for targeted enhancement of vertical load-bearing capacity.

[0049] In practice, the depth of the large-diameter section of the stepped hole is greater than the height of the bolt head.

[0050] In this way, the bolt head is sunk into the large-diameter section of the stepped hole, avoiding collision with the bolt head when the jack is lifted.

[0051] In practice, the pad body is injection molded from plastic material.

[0052] In this way, the plastic material completely eliminates the problem of metal corrosion and is suitable for salt spray and humid environments; the polymer material absorbs the impact and vibration of the lifting process, reducing the probability of abnormal noises; and it blocks the conductive path between the vehicle body and the lifting equipment to prevent static sparks.

[0053] During implementation, the positioning column and the pad block body are integrally injection molded.

[0054] This eliminates the risk of loosening of the modular positioning pins, ensuring they remain functional for life; the mold forming process ensures minimal verticality error of the positioning pins, improving assembly sealing; and the elimination of secondary processing / assembly steps for the positioning pins reduces the manufacturing cost per unit.

[0055] Finally, it should be noted that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A side beam pad for automobile chassis, fixedly installed at the lower end of a side beam of an automobile chassis, characterized in that, The device includes a pad body and a connecting bolt. The pad body has a stepped hole through it. The small-diameter section of the stepped hole allows the shank of the connecting bolt to pass through but not the head of the connecting bolt. The large-diameter section of the stepped hole allows the head of the connecting bolt to pass through. The shank of the connecting bolt is connected to a pre-drilled threaded hole in the side beam of the vehicle chassis. The pad body is fitted to the side beam of the vehicle chassis.

2. The automobile chassis side beam pad block according to claim 1, characterized in that, The pad block body has two positioning posts at one end. The two positioning posts are symmetrically arranged on both sides of the stepped hole, and the two positioning posts are respectively inserted into the pre-positioned holes of the side beam of the automobile chassis.

3. The automobile chassis side beam pad block according to claim 2, characterized in that, The pad body has eight bottom hollow areas, and a bottom reinforcing rib is formed between every two adjacent bottom hollow areas.

4. The automobile chassis side beam pad block according to claim 3, characterized in that, The pad block body is provided with several circumferentially hollowed-out areas, and a lateral reinforcing rib is formed between every two adjacent circumferentially hollowed-out areas.

5. A car chassis side beam pad block according to claim 4, characterized in that, The thickness of the bottom reinforcing rib is greater than that of the side reinforcing rib.

6. The automobile chassis side beam pad block as described in claim 1, characterized in that, The depth of the large-diameter section of the stepped hole is greater than the height of the bolt head.

7. A vehicle chassis side beam pad block as described in claim 2, characterized in that, The pad body is injection molded from plastic material.

8. The automobile chassis side beam pad block as described in claim 7, characterized in that, The positioning column and the pad block body are integrally injection molded.

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