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CN-122009323-A - Lightweight cast aluminum steering knuckle and manufacturing method thereof

CN122009323ACN 122009323 ACN122009323 ACN 122009323ACN-122009323-A

Abstract

The utility model provides a lightweight cast aluminum knuckle and manufacturing method thereof relates to automobile parts design and manufacturing field, including the knuckle body, the knuckle body has the gooseneck position, and the inside cavity structure that is equipped with of gooseneck position is equipped with the side lightening hole structure with cavity structure intercommunication, and the knuckle body is equipped with the lightening nest structure near lower control arm mounting point. Through the design of the cavity at the gooseneck part, the further light weight of the cast aluminum steering knuckle is realized, and the obvious weight reduction effect is finally achieved by combining the side weight reduction hole at the gooseneck part and the hollow weight reduction nest near the lower control arm.

Inventors

  • Tan Chengtong
  • Fan Miqian
  • LUO FENGBAO
  • ZHANG CHAO
  • TAO XICHEN
  • YAN HANG
  • WANG KAIQING
  • SONG BING
  • QU LIJIE

Assignees

  • 中信戴卡股份有限公司

Dates

Publication Date
20260512
Application Date
20260122

Claims (10)

  1. 1. The utility model provides a lightweight cast aluminum knuckle, its characterized in that, includes the knuckle body, the knuckle body has the gooseneck position, the inside cavity structure (100) that is equipped with in gooseneck position, the side at gooseneck position be equipped with side lightening hole structure (102) of cavity structure (100) intercommunication, the knuckle body is equipped with weight reduction nest structure (101) near lower control arm mounting point.
  2. 2. The lightweight cast aluminium steering knuckle according to claim 1, characterized in that the wall thickness of the cavity structure (100) is 5-6mm.
  3. 3. The lightweight cast aluminium steering knuckle according to claim 1, characterized in that the side lightening hole structure (102) is formed by a core print (9).
  4. 4. The lightweight cast aluminium steering knuckle according to claim 1, characterized in that the outer surface of the cavity structure (100) is provided with reticulation ribs (21).
  5. 5. The lightweight cast aluminum knuckle of claim 1, wherein the knuckle body further includes an upper control arm mounting point (1), a brake caliper mounting hole (2), a center hole (3), a tie rod mounting point (4), a lower control arm mounting point (5), a lower control arm mounting point No. two (6), and a bracket mounting hole (8).
  6. 6. A method of manufacturing the lightweight cast aluminum steering knuckle of any one of claims 1-5, comprising the steps of: A core-making step of manufacturing a sand core for forming a cavity structure (100); Casting, namely placing the sand core in a mould to perform molten aluminum casting to form a knuckle blank with a cavity structure (100), a side lightening hole structure (102) and a lightening nest structure (101); and a sand removal step, namely crushing and discharging the sand core in the knuckle blank.
  7. 7. The method of manufacturing according to claim 6, wherein the core-making step uses a one-die four-cavity coated sand hot box process to produce a first cavity sand core (13), a second cavity sand core (14), a third cavity sand core (15), and a fourth cavity sand core (16).
  8. 8. The method of manufacture according to claim 6, wherein the casting step employs a gating system comprising a gate (18) and a riser (17), the gate (18) being located near the central bore (3) and the riser (17) being located near the upper control arm mounting point (1).
  9. 9. The manufacturing method according to claim 6, characterized in that a reticulation rib (21) is formed on the outer surface of the cavity structure (100).
  10. 10. The method of manufacturing according to claim 6, wherein the step of desanding employs a dedicated tooling provided with primary and secondary support points for supporting the knuckle blank and a hammer point for hammering.

Description

Lightweight cast aluminum steering knuckle and manufacturing method thereof Technical Field The invention relates to the technical field of automobile part design and manufacture, in particular to a lightweight cast aluminum steering knuckle and a manufacturing method thereof. Background The steering knuckle, also called as a 'claw', is one of key parts in an automobile suspension system and mainly used for connecting each control arm assembly, a hub bearing for mounting wheels and connecting the wheels and a vehicle body. During driving of the automobile, the knuckle is continuously subjected to various impact loads, and thus must have high strength and durability. Conventional knuckles are typically manufactured from cast iron or cast steel materials that, while having high strength and wear resistance, are heavy, have a significant impact on the suspension system performance and fuel economy of the vehicle. At present, the solid cast aluminum steering knuckle is widely applied in the industry, particularly in middle-high-end cars, electric vehicles and hybrid vehicles. The steering knuckle is the first choice for pursuing operability, cruising ability and lightweight vehicle types. Compared with cast iron steering knuckles, the cast aluminum steering knuckle can reduce unsprung mass, so that the suspension system responds more rapidly, the tire grounding property is better, and the vehicle control is more flexible and accurate. Meanwhile, the weight of the vehicle can be reduced, the oil consumption of the fuel vehicle can be directly reduced, or the endurance mileage of the electric vehicle can be increased, and the method has great significance for the electric vehicle. However, with the competing development of the automotive industry and the change of people's consumption concepts, the problems of high price of aluminum alloy raw materials and high cost of cast aluminum steering knuckle single piece are becoming more and more of the attention of practitioners. How to further amplify the light weight advantage and effectively reduce the realization cost is a problem to be solved in the current automobile part industry. Disclosure of Invention In view of the above, the present invention aims to provide a lightweight cast aluminum knuckle and a manufacturing method thereof, which can significantly improve the weight reduction of the knuckle. In order to achieve the above purpose, the technical scheme of the invention is realized as follows: The utility model provides a lightweight cast aluminum knuckle, includes the knuckle body, and the knuckle body has the gooseneck position, and the inside cavity structure that is equipped with in gooseneck position, the side at gooseneck position be equipped with cavity structure intercommunication's side lightening hole structure, the knuckle body is equipped with the lightening nest structure near lower control arm mounting point. In some embodiments, the wall thickness of the cavity structure is 5-6mm. In some embodiments, the side lightening hole structure is formed by a core print. In some embodiments, the outer surface of the cavity structure is provided with a reticulation. In some embodiments, the knuckle body further includes an upper control arm mounting point, a brake caliper mounting hole, a center hole, a steering tie rod mounting point, a first lower control arm mounting point, a second lower control arm mounting point, and a bracket mounting hole. The manufacturing method of the lightweight cast aluminum steering knuckle comprises the steps of manufacturing a core for forming a cavity structure, casting, placing the core in a die for aluminum liquid pouring to form a steering knuckle blank with the cavity structure, a side lightening hole structure and a lightening nest structure, and removing sand to smash and discharge the core in the steering knuckle blank. In some embodiments, the core making step employs a one-die four-cavity precoated sand hot box process to produce a first cavity sand core, a second cavity sand core, a third cavity sand core, and a fourth cavity sand core. In some embodiments, the casting step employs a gating system that includes a gate positioned near the central bore and a riser positioned near the upper control arm mounting point. In some embodiments, a cross-hatch rib is formed on the outer surface of the cavity structure. In some embodiments, the desanding step employs a dedicated tooling provided with a main support point and an auxiliary support point for supporting the knuckle blank, and a hammering point for hammering. The invention provides a lightweight cast aluminum steering knuckle and a manufacturing method thereof, and compared with a traditional solid cast aluminum steering knuckle, the lightweight cast aluminum steering knuckle adopts a hollow core design mode. The design adopts a cavity form at the gooseneck part of the knuckle, and simultaneously, a plurality of weight reducing holes are designed on the side