Double-fork-arm type aluminum alloy front steering knuckle with laterally-mounted fixed calipers

Abstract

A double-fork-arm type aluminum alloy front steering knuckle for laterally installing fixed calipers comprises a steering pull rod installation part used for installing a steering pull rod, a hub bearing installation part provided with a bearing installation flange face surrounding a bearing via hole, and two boss structures which are formed on the side edges of the front steering knuckle on the opposite sides of the steering pull rod and are separated from each other. The boss structure comprises a vertical face perpendicular to the bearing installation flange face and a threaded structure transversely formed on the vertical face of the boss and perpendicular to the hub bearing direction, and the fixed calipers and the front steering knuckle are laterally matched together through the threaded structure to be locked. Therefore, the structural rigidity and the fatigue life of the knuckle calipers can be improved.

Description

Technical Field

[0001] The utility model relates to a vehicle steering knuckle technology, and more specifically to a novel double-wishbone aluminum alloy front steering knuckle with a laterally mounted fixed caliper, which can meet high-performance driving requirements through structural optimization. Background Art

[0002] With the rapid development of electric vehicles in recent years, more and more cars are choosing double wishbone steering knuckles. The braking performance of a car not only affects the car's handling, but also directly affects its safety. In the selection of calipers, there are mainly two types of brake calipers, floating calipers and laterally mounted fixed calipers. Compared with floating calipers, fixed calipers have more brake pistons and cylinders, and there are brake pistons on both sides. On the other hand, fixed calipers have a larger braking contact area than floating calipers. Due to the structural difference between fixed calipers and floating calipers, fixed calipers require more assembly space. Against this background, the usage rate of fixed calipers with more pistons and cylinders and better braking performance has become increasingly higher. Under the application of this caliper, the demand for assembly space and the performance requirements of the steering knuckle are also higher. As the most critical part of the independent suspension structure, the steering knuckle connects various swing arms and bearings in the suspension as well as the brake caliper, and is the most critical link in achieving high-performance driving of the car. In the practical cooperation process between the steering knuckle and the caliper, higher requirements are placed on the rigidity, strength and fatigue resistance of the steering knuckle. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide a new double wishbone cast aluminum front steering knuckle structure that can transversely install the caliper, and the transverse bolt installation method of the double wishbone front steering knuckle and the caliper is attempted for the first time, thereby realizing the transverse installation method of the brake caliper of the double wishbone front steering knuckle, which can be used to increase the structural rigidity and fatigue life of the steering knuckle caliper.

[0004] The utility model provides a double-wishbone aluminum alloy front steering knuckle with a laterally mounted fixed caliper, comprising a steering tie rod mounting portion for mounting a steering tie rod, a wheel hub bearing mounting portion having a bearing mounting flange surface surrounding a bearing through hole, and two boss structures separated from each other formed on the side edges of the front steering knuckle on opposite sides of the steering tie rod, the boss structure comprising: a vertical surface perpendicular to the bearing mounting flange surface, and a threaded structure formed transversely on the boss vertical surface and perpendicular to the direction of the wheel hub bearing, and the fixed caliper and the front steering knuckle are laterally matched and locked together through the threaded structure.

[0005] Preferably, the minimum mating plane for lateral mating is a square area with a minimum side length of 32 mm, wherein the surface profile of the vertical surface is 0.2, the flatness is 0.1, and the roughness is Rz12.5.

[0006] Preferably, the front steering knuckle is made of AlSi7 Mg 0.3 Made of aluminum alloy differential pressure casting.

[0007] Preferably, the double-wishbone aluminum alloy front steering knuckle with a laterally mounted fixed caliper further comprises: an upper control arm mounting portion locked with the front steering knuckle via a ball pin.

[0008] Preferably, the double-wishbone aluminum alloy front steering knuckle with a laterally mounted fixed caliper further comprises: a wire harness clamp mounting portion for fastening the wire harness clamp to the front steering knuckle.

[0009] Preferably, the double-wishbone aluminum alloy front steering knuckle with a laterally mounted fixed caliper further comprises: a stabilizer bar mounting portion for fastening the stabilizer bar ball pin to the front steering knuckle.

[0010] Preferably, the double-wishbone aluminum alloy front steering knuckle with a laterally mounted fixed caliper further comprises: a wheel speed sensor mounting portion for fastening the wheel speed sensor to the front steering knuckle.

[0011] Preferably, the wheel hub bearing mounting portion is clearance-fitted with the wheel hub bearing at the center hole of the steering knuckle.

[0012] Preferably, the double-wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper further comprises: a dust cover hole mounting portion for fastening the dust cover to the front steering knuckle.

[0013] Preferably, the double-wishbone aluminum alloy front steering knuckle with a laterally mounted fixed caliper further comprises: a front lower control arm mounting portion (8) and a rear lower control arm mounting portion, which are respectively used to fasten the front lower control arm and the rear lower control arm to the front steering knuckle.

[0014] Through the design of the utility model, the caliper is fastened to the lateral mounting surface of the front steering knuckle by lateral bolts, which greatly reduces the shear stress of the front steering knuckle in braking conditions, and instead provides the braking performance of the caliper through the tensile and compressive material properties, successfully avoiding stress concentration during vehicle driving, thereby improving the braking performance of the front steering knuckle and meeting the braking performance requirements of customers' high-performance models. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial assembly schematic diagram of the utility model.

[0016] Figure 2 It is a schematic diagram of the semi-axle side structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the hub side structure of the utility model.

[0018] Figure 4 It is a partial engineering drawing of the front steering knuckle of the utility model.

[0019] Figure 5 It is a side structural sectional view of the utility model. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the present utility model are described in detail below in conjunction with the accompanying drawings. The exemplary embodiments described below and shown in the accompanying drawings are intended to teach the principles of the present utility model, so that those skilled in the art can implement and use the present utility model in several different environments and for several different applications. Therefore, the scope of protection of the present utility model is defined by the attached claims, and the exemplary embodiments are not intended to be, and should not be considered as, a restrictive description of the scope of protection of the present utility model. Moreover, for the convenience of description, the same elements in the accompanying drawings are represented by the same or similar reference numerals, and the sizes of the various parts shown are not necessarily drawn according to the actual proportional relationship. The description of the orientation, such as the axial or circumferential direction of the corresponding axis of the shaft hole, and the orientation or position relationship indicated by the upper, lower, left, right, top, bottom, etc., are all based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The following description of each embodiment emphasizes the differences between the embodiments. The same or similar aspects can be referenced to each other. For the sake of brevity, they will not be described one by one. The technical features in different embodiments can be freely combined according to design requirements to form more embodiments.

[0021] like Figure 1 As shown, the caliper of the utility model is installed in a direction perpendicular to the axis of the bearing through hole 25, on the steering rod (see Figure 1 The opposite side of the left steering tie rod mounting part 4) is connected to the steering knuckle body 21 by threaded locking through the mounting hole (back side in the figure, not shown) of the fixed caliper 24 through the bolt 23. The brake disc 22 is connected to the wheel and is concentric with the bearing through hole 25. When the fixed caliper 24 works and the brake disc 22 is locked, the braking operation of the vehicle can be realized.

[0022] like Figure 2 The double wishbone aluminum alloy front steering knuckle (also called aluminum double wishbone front steering knuckle) mainly includes: an upper control arm mounting part 1, a harness card mounting part 2, a stabilizer bar mounting part 3, a steering tie rod mounting part 4, a wheel speed sensor mounting part 5, a hub bearing mounting part 6 having a bearing mounting flange surface surrounding a bearing through hole 25, a dust cover mounting part 7, a front lower control arm mounting part 8, a rear lower control arm mounting part 9, and a caliper mounting part 10.

[0023] At the upper control arm mounting portion 1, a bolt is passed through the upper control arm ball pin locking slot to lock the ball pin with the front steering knuckle;

[0024] At each harness card installation portion 2, the harness card is directly fastened to the front steering knuckle by bolts;

[0025] At the stabilizer bar mounting portion 3, the stabilizer bar ball pin is directly fastened to the front steering knuckle by bolts;

[0026] At the steering tie rod mounting portion 4, the steering tie rod ball pin matches with the conical surface of the steering knuckle mounting portion 4, and the ball pin is locked and fastened together through the nut thread structure;

[0027] On the wheel speed sensor mounting part 5, fit the wheel speed sensor in the mounting hole gap, and fasten the wheel speed sensor to the front steering knuckle with bolts through the threaded structure of the wheel speed sensor mounting part 5;

[0028] At the wheel hub bearing mounting portion 6, the wheel hub bearing clearance is fitted in the bearing through hole 25, i.e., the center hole of the steering knuckle, and the wheel hub bearing is fastened to the front steering knuckle through the four bolt holes next to the center hole of the steering knuckle;

[0029] At the dust cover hole mounting portion 7, the dust cover is directly fastened to the front steering knuckle by three bolts;

[0030] At the front lower control arm mounting portion 8 and the rear lower control arm mounting portion 9, the ball pins of the front lower control arm and the rear lower control arm are matched with the conical surfaces of the front lower control arm mounting portion 8 and the rear lower control arm mounting portion 9, and then the ball pins are fastened to the front steering knuckles with nuts;

[0031] In the caliper mounting portion 10, two casting bosses are added on the side of the front steering knuckle, such as Figure 4 , 5 The first boss 101 and the second boss 102 shown are 235mm apart. The boss end face (also called machined end face, vertical face, and caliper mounting mating plane after machining) is perpendicular to the bearing mounting flange surface, with a surface profile of 0.2, a flatness of 0.1, and a roughness of Rz12.5. The minimum mating plane of the end face is a square area with a minimum side length of 32mm. M14×2.0 threads are tapped transversely on the boss end face. C1.5 chamfers are added to the threads. The mounting end face of the caliper matches the boss end face, and is locked with the caliper and the tapped threads using M14 bolts. In this way, by casting the boss and machining the threads perpendicular to the direction of the wheel hub bearing, a fixed caliper lateral mounting structure can be achieved.

[0032] According to the embodiment of the utility model, the cast aluminum front double wishbone front steering knuckle is made of AlSi 7 Mg 0.3It is made of aluminum alloy differential pressure casting, and two boss structures are added to the side of the double wishbone front steering knuckle flange. The vertical surface perpendicular to the bearing mounting flange surface is machined on the boss. The fixed caliper and the front steering knuckle are laterally fitted together and locked through the threaded structure by using this vertical surface. Through such a structural design, the rigidity, strength and fatigue resistance of the front steering knuckle are greatly improved. The wheel hub bearing is fastened to the wheel hub bearing mounting part 6, i.e. the flange bearing mounting part, by bolts through clearance fit.

[0033] In the description of the present application, "multiple" means two or more than two, unless otherwise clearly and specifically defined. Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. Although the present invention has been described with reference to various specific embodiments, it should be understood that variations can be made within the spirit and scope of the concept of the described utility model. Therefore, it is intended that the present invention is not limited to the described embodiments, but will have the full scope defined by the language of the appended claims.

Claims

1. A double wishbone aluminum alloy front steering knuckle with a laterally mounted fixed caliper, comprising a steering tie rod mounting portion (4) for mounting a steering tie rod, and a wheel hub bearing mounting portion (6) having a bearing mounting flange surface surrounding a bearing through hole (25), characterized in that: Also includes: Two boss structures separated from each other are formed on the side of the front steering knuckle on the opposite side of the steering rod. The boss structure includes: a vertical surface perpendicular to the bearing mounting flange surface, and a threaded structure formed laterally on the boss vertical surface and perpendicular to the direction of the wheel hub bearing. The fixed caliper and the front steering knuckle are laterally matched and locked together through the threaded structure.

2. The double wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper according to claim 1, characterized in that: Also includes: A front lower control arm mounting portion (8) and a rear lower control arm mounting portion (9) are respectively used to fasten the front lower control arm and the rear lower control arm to the front steering knuckle.

3. The double wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper according to claim 1, characterized in that: Front steering knuckle made of AlSi7Mg 0.3 Made of aluminum alloy differential pressure casting.

4. The double wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper according to claim 1, characterized in that: Also includes: The upper control arm mounting portion (1) is locked to the front steering knuckle via a ball pin.

5. The double wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper according to claim 1, characterized in that: Also includes: The wiring harness clamp is used to fasten the wiring harness clamp to the wiring harness clamp mounting portion (2) on the front steering knuckle.

6. The double wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper according to claim 1, characterized in that: Also includes: The stabilizer bar mounting portion (3) is used to fasten the stabilizer bar ball pin to the front steering knuckle.

7. The double wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper according to claim 1, characterized in that: Also includes: The wheel speed sensor mounting portion (5) is used to fasten the wheel speed sensor to the front steering knuckle.

8. The double wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper according to claim 1, characterized in that: The wheel hub bearing mounting portion (6) is clearance-fitted with the wheel hub bearing at the center hole of the steering knuckle.

9. The double wishbone aluminum alloy front steering knuckle of the laterally mounted fixed caliper according to claim 1, characterized in that: Also includes: The dust cover hole mounting portion (7) is used to fasten the dust cover to the front steering knuckle.

Images