A fender support with damping

Abstract

The utility model relates to a fender support with damping vibration reduction belongs to fender support technical field, including base and steel pipe, steel pipe one end and base friction welding, the position of base and steel pipe connection forms weld joint, and the both sides of weld joint are friction welding heat affected zone, and the fracture of car fender support mainly occurs in friction welding heat affected zone, and the inside cavity of weld joint is filled with damping material, and damping material one end stretches into steel pipe inside cavity, and its other end stretches into base inside cavity, and damping material has the characteristics of energy absorption and vibration reduction, can convert the vibration kinetic energy that fender support bears into heat energy and dissipate, reduce the vibration amplitude (amplitude) and vibration frequency (vibration frequency) of whole fender support from the source, and the scheme reduces the vibration load by a large margin, avoids the concentration and accumulation of stress in heat affected zone, makes the fatigue life of fender support be able to improve by orders of magnitude.

Description

Technical Field

[0001] This utility model relates to the field of mudguard bracket technology, and in particular to a mudguard bracket with damping and vibration reduction. Background Technology

[0002] The mudguard bracket for commercial vehicles is a key component connecting the vehicle frame and the mudguard, and its reliability directly affects the vehicle's driving safety and compliance. The demands for lightweight design and connection strength have made friction welding the mainstream technology for manufacturing commercial vehicle mudguard brackets. This process uses the heat generated by mechanical friction to weld the steel tube serving as the support tube to the mounting base (usually forged steel) into a single unit. Although friction welding achieves higher static strength compared to traditional arc welding, its inherent technical characteristics still present new challenges.

[0003] The existing technology has the following problems: Fatigue fracture in the heat-affected zone (HAZ) of friction welding: The friction welding process creates a HAZ near the weld, where the metallographic structure and mechanical properties of the material change, and its fatigue strength is often lower than that of the base material. When commercial vehicles travel under complex road conditions, the bracket is subjected to continuous multi-directional random vibrations and impact loads, and stress easily concentrates in the HAZ, leading to fatigue fracture that originates from and propagates from the HAZ. This is currently the most prevalent failure mode for friction-welded mudguard brackets.

[0004] To address the problems in existing technologies, we propose a mudguard bracket with damping vibration reduction. Utility Model Content

[0005] This utility model addresses the problems in the prior art by providing a mudguard bracket with damping and vibration reduction, which is achieved through the following technical solution: A mudguard bracket with damping vibration reduction includes a base and a steel pipe. One end of the steel pipe is friction-welded to the base, and a weld seam is formed at the connection between the base and the steel pipe. The inner cavity of the weld seam is filled with damping material. One end of the damping material extends into the inner cavity of the steel pipe, and the other end extends into the inner cavity of the base.

[0006] The present invention is further configured such that the damping material is aluminum foam.

[0007] The present invention is further configured such that one end of the damping material is flush with the base hole, and the other end is 30-50mm away from the weld seam.

[0008] The present invention is further configured such that: the damping material is a prefabricated part made of aluminum foam, and the damping material is interference-fitted with the base and the inner cavity of the steel pipe respectively.

[0009] The present invention is further configured such that the damping material is foamed and molded in the inner cavity of the base and the inner cavity of the steel pipe respectively.

[0010] In summary, the beneficial technical effects of this utility model are as follows: Damping materials have energy absorption and vibration reduction properties. Filling both sides of the weld seam with damping material can convert the kinetic energy of the severe vibration borne by the mudguard bracket into heat energy and dissipate it. This reduces the vibration amplitude and vibration frequency of the entire mudguard bracket from the source. By significantly reducing the vibration load, this solution avoids the concentration and accumulation of stress in the heat-affected zone, thereby improving the fatigue life of the mudguard bracket by orders of magnitude. Attached Figure Description

[0011] Figure 1 This is the main view used for the overall structure of this embodiment; Figure 2 It is along Figure 1 A cross-sectional view of section line AA in the middle.

[0012] Reference numerals: 1. Base; 2. Steel pipe; 3. Weld seam; 4. Damping material. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings. Example

[0014] like Figure 1-2 As shown, this utility model discloses a mudguard bracket with damping and vibration reduction, including a base 1 and a steel pipe 2. One end of the steel pipe 2 is friction-welded to the base 1, and a weld seam 3 is formed at the connection between the base 1 and the steel pipe 2. The two sides of the weld seam 3 are the friction weld heat-affected zone, where the fender bracket fracture mainly occurs. Damping material 4 is filled into the cavity of the weld seam 3. One end of the damping material 4 extends into the cavity of the steel pipe 2, and the other end extends into the cavity of the base 1. The damping material 4 has energy absorption and vibration reduction characteristics, which can convert the vibration kinetic energy borne by the mudguard bracket into heat energy for dissipation, thereby reducing the vibration amplitude and vibration frequency of the entire mudguard bracket from the source. This solution significantly reduces the vibration load, avoids the concentration and accumulation of stress in the heat-affected zone, and improves the fatigue life of the mudguard bracket by orders of magnitude.

[0015] Damping material 4 is aluminum foam, a lightweight material with a density typically between 0.25-0.6 g / cm³. 3 With a density between 0.1 and 0.4 times that of metallic aluminum, it was filled into the inner cavity of weld seam 3, achieving vibration reduction without significantly increasing the weight of the mudguard bracket, which is in line with the current trend of lightweighting in commercial vehicles.

[0016] One end of the damping material 4 is flush with the hole in the base 1, and the other end is 30-50mm away from the weld seam 3, ensuring that the damping material 4 completely covers the friction welding heat-affected zone. The supporting and vibration-damping effect of the damping material effectively protects the friction welding heat-affected zone.

[0017] The damping material 4 can be a prefabricated component made of aluminum foam. The damping material 4 is interference-fitted with the inner cavities of both the base 1 and the steel pipe 2, preventing gaps between the damping material 4 and the base 1 and steel pipe 2 that would affect its vibration reduction effect. Alternatively, the damping material 4 can be foamed and molded separately within the inner cavities of the base 1 and the steel pipe 2. This foaming process ensures a tight bond between the damping material 4 and the inner cavities of the base 1 and steel pipe 2, further enhancing its performance.

Claims

1. A mudguard bracket with damping and vibration reduction, comprising a base (1) and a steel pipe (2), wherein one end of the steel pipe (2) is friction-welded to the base (1), and a weld seam (3) is formed at the connection between the base (1) and the steel pipe (2), characterized in that, The inner cavity of the weld seam (3) is filled with damping material (4), one end of which extends into the inner cavity of the steel pipe (2) and the other end extends into the inner cavity of the base (1).

2. The mudguard bracket with damping and vibration reduction according to claim 1, characterized in that, The damping material (4) is aluminum foam.

3. A mudguard bracket with damping and vibration reduction according to claim 2, characterized in that, One end of the damping material (4) is flush with the hole of the base (1), and the other end is 30-50mm away from the weld seam (3).

4. A mudguard bracket with damping and vibration reduction according to claim 3, characterized in that, The damping material (4) is a prefabricated part made of aluminum foam, and the damping material (4) is interference-fitted with the inner cavity of the base (1) and the steel pipe (2).

5. A mudguard bracket with damping and vibration reduction according to claim 3, characterized in that, The damping material (4) is foamed in the inner cavity of the base (1) and the inner cavity of the steel pipe (2).

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