CN206288080U - A kind of fore sub frame - Google Patents

Abstract

The utility model discloses a front auxiliary frame, which comprises a substantially square frame-shaped auxiliary frame body. The auxiliary frame body is integral and is formed by enclosing a front beam, a rear beam and two longitudinal beams with the same specifications. ; Wherein, the front beam, the rear beam and the longitudinal beam are all channel beams with an open bottom, and several reinforcing ribs are arranged in the channel beam; each of the longitudinal beams A pair of hinge seats for hinged swing arms are respectively built in, and each hinge seat is composed of two adjacent reinforcing ribs respectively; Gaps. In the front sub-frame of this structure, the hinge seat used to articulate the swing arm is built in the longitudinal beam of the sub-frame body, and each hinge seat is composed of two adjacent reinforcing ribs, thereby improving the hinge seat. fatigue strength and structural strength.

Description

A front subframe

technical field

The utility model relates to the field of auto parts, in particular to a front auxiliary frame.

Background technique

As an important load-bearing element of the automobile chassis system, the front subframe plays an important role in improving the driving comfort and handling performance of the automobile. The traditional sub-frame structure is stamped and formed by steel plate and then welded. Due to the welding process, the forming accuracy of the sub-frame is not ideal. Therefore, the welding-formed sub-frame has a great influence on the installation accuracy of the chassis module and the body.

In view of the above situation, the Chinese utility model patent (CN 203511775 U) discloses a subframe structure, the subframe structure includes a subframe body, the subframe body is set as a plate structure with a hole in the middle, One end of the sub-frame body is fixedly connected with the swing arm, the sub-frame body is fixedly connected with a plurality of swing arm brackets, and the swing arm is fixedly connected with the swing arm brackets. The sub-frame body is provided with a laterally stabilizing rod support, and the laterally stabilizing rod is movably connected with the laterally stabilizing rod bracket. The lower part of the sub-frame body is provided with two swing arm brackets, each swing arm bracket is composed of two plates, and the two ends of the swing arm are respectively fixedly connected with the two swing arm brackets by a fixing pin.

Compared with the sub-frame made of traditional steel stamping and then welding, the sub-frame structure of the above-mentioned one-piece structure reduces the cumulative error caused by the assembly of parts and improves the product accuracy. However, the swing arm bracket placed outside (lower part) of the sub-frame body and composed of plates has only one end connected to the sub-frame body, so the swing arm bracket lacks good fatigue resistance.

Utility model content

The purpose of the utility model is to provide a front sub-frame with a novel structure, aiming at improving the fatigue resistance and structural strength of the front sub-frame at the hinge joint of the swing arm.

For the convenience of making a clear description of the front subframe, first, define the longitudinal direction of the vehicle body when the front subframe is installed on the vehicle (ie, the front-rear direction), and the width direction of the vehicle body as the horizontal direction (ie, the left-right direction). Further, define the direction that the front of the vehicle points when the front sub-frame is installed on the vehicle as the front direction.

For this purpose, the utility model adopts the following technical solutions:

A front sub-frame has the following characteristics: it includes a substantially square frame-shaped sub-frame body, the sub-frame body is integral and is surrounded by a front crossbeam, a rear crossbeam and two longitudinal beams of the same specification; wherein, The front beam, the rear beam and the longitudinal beam are channel beams with an open bottom, and there are several reinforcing ribs in the channel beam; each longitudinal beam has a pair of hinge seats for hinged arms, Each hinge seat is composed of two adjacent reinforcing ribs; the hinge seat opens a gap to the outside of the sub-frame body. Said notch facilitates the articulation of the swing arm.

For the front subframe of this structure, the front crossbeam, rear crossbeam and longitudinal beam that encircle the integral subframe body are all designed as channel beams, and several reinforcing ribs are arranged in the channel beams; so that the front subframe Under the premise of maintaining high structural strength and torsional rigidity, the frame can effectively reduce its own weight and reduce the cumulative error caused by component assembly, which improves the forming accuracy of the sub-frame. Moreover, the front sub-frame of integral structure reduces the number of manufacturing molds, thereby reducing the cost of molds.

In addition, the hinge seat used to articulate the swing arm is built in the longitudinal beam, and each hinge seat is composed of two adjacent reinforcing ribs. Since the multiple edge parts of the reinforcing rib are integrated with the longitudinal beam, the hinge is improved. The fatigue strength and structural strength of the seat.

Further, the above-mentioned front sub-frame also has the following features: in each hinge seat, two reinforcing ribs are parallel to each other.

The front sub-frame of this structure can ensure that the "herringbone"-shaped swing arm swings vertically and avoids longitudinal movement.

Further, the above-mentioned front sub-frame also has the following features: the top of the rear cross member is integrated with a power system suspension bracket.

The front subframe of this structure can effectively reduce the vibration energy transmitted from the power system to the body, thereby improving the NVH (noise, vibration and harshness) performance of the vehicle.

Further, the above-mentioned front sub-frame also has the following features: a set of steering gear mounting seats are also integrated on the rear side wall of the rear cross member.

The front auxiliary frame of this structure is convenient for the installation and fixation of the steering gear.

Further, the above-mentioned front sub-frame also has the following features: the top of the front end of each longitudinal beam is respectively fixed with a stabilizer bar bracket.

The front subframe of this structure integrates the suspension bracket of the power system, the steering gear mounting seat, the hinge seat and the stabilizer bar bracket on the subframe body, and other parts of the chassis are installed behind the front subframe to form a chassis module. It is convenient to install with the vehicle body, and can also simplify the structure of the vehicle body.

Further, the above-mentioned front subframe also has the following features: a hollow positioning pin is provided on the top of the front end and/or rear end of the subframe body, and the front subframe body and the vehicle body are positioned by a through hollow The threaded fasteners of the pins are detachably connected.

The front sub-frame of this structure enables the chassis module to be positioned and connected with the vehicle body conveniently and quickly, thereby improving the vehicle assembly efficiency.

Further, the above-mentioned front sub-frame also has the following features: a hollow positioning pin is respectively arranged at the right front end and the left rear end of the sub-frame body. Of course, the sub-frame body can also preferably be provided with a hollow positioning pin at the left front end and the right rear end respectively. That is, a hollow positioning pin is respectively arranged at both ends of the diagonal line of the optional square frame-shaped sub-frame body.

The front sub-frame of this structure adopts a diagonal positioning method, which can better realize the positioning effect.

Further, the above-mentioned front sub-frame also has the following features: the front sub-frame is cast or forged or machined from aluminum alloy material.

The front sub-frame of this structure can make full use of the advantages of light weight, high strength and easy processing of aluminum alloy to facilitate the realization of light weight of the vehicle body and ensure high rigidity.

Further, the above-mentioned front sub-frame also has the following features: the front sub-frame is cast and machined from an aluminum alloy material, that is, it is formed by first casting a blank and then finishing; or, the front sub-frame is made of an aluminum alloy Material forging and machining forming, that is, forging the blank first and then finishing it.

The front subframe with this structure can optimize the manufacturing process and reduce the production cost.

Description of drawings

Figure 1 is a schematic diagram of the connection between a front subframe and a swing arm.

Fig. 2 is a perspective view of a front sub-frame body.

Fig. 3 is a perspective view of a front sub-frame body from another viewing angle.

In the accompanying drawings: 100, sub-frame body; 1, front beam; 2, rear beam; 21, power system suspension bracket; 22, steering gear mounting seat; 3, longitudinal beam; 31, hinge seat; 32, lateral stability Rod support; 33, gap; 4, reinforcing rib; 5, hollow positioning pin; 200, swing arm.

detailed description

Figure 1 is a schematic diagram of the connection between a front subframe and a swing arm. As shown in FIG. 1 , the front subframe provided in this embodiment includes a substantially square frame-shaped subframe body 100 , the left end and the right end of which are respectively connected to a "herringbone"-shaped swing arm 200 .

Fig. 2 is a perspective view of a front sub-frame body. As shown in FIG. 2 , the sub-frame body 100 is integral and is surrounded by a front crossbeam 1 , a rear crossbeam 2 and two longitudinal beams 3 of the same specification;

In this embodiment, the front beam 1 , the rear beam 2 and the longitudinal beam 3 are all channel-shaped beams with an open bottom, and several reinforcing ribs 4 are arranged in the channel-shaped beams. In order to ensure the overall strength of the front sub-frame, the number and arrangement of ribs 4 are optimized after CAE analysis.

Each longitudinal beam 3 has a pair of built-in hinge seats 31 for hinged swing arm 200, and each hinge seat 31 is composed of two adjacent reinforcing ribs 4, and in each hinge seat 31, the two reinforcing ribs 4 specifications same and parallel to each other.

Fig. 3 is a perspective view of a front sub-frame body from another viewing angle. As shown in Figures 1-3, the hinge seat 31 has a gap 33 to the outside of the sub-frame body, that is, the hinged end of the swing arm 200 extends into the longitudinal beam 3 from the gap 33 and is hinged with the hinge seat 31 .

As shown in FIG. 3 , a power system suspension bracket 21 is integrated on the top of the rear cross member 2 , and a set of steering gear mounting seats 22 are also integrated on the rear side wall of the rear cross member 2 . It should be noted that the installation positions of the power system suspension bracket 21 and the steering gear mounting base 22 are longitudinally staggered, for example, the power system suspension bracket 21 is located at the front side of the steering gear mounting base 22 . In addition, a stabilizer bar bracket 32 is respectively fixed on the top of the front end of each longitudinal beam 3 , and the stabilizer bar bracket 32 can fix the connecting arm of the stabilizer bar (not shown in the figure) on the front end of the longitudinal beam 3 .

As shown in FIG. 3 , a hollow positioning pin 5 is erected on the top of the front end and rear end of the sub-frame body 100 respectively. Specifically, a hollow positioning pin 5 is respectively fixed on the right front end and the left rear end of the sub-frame body 100 , and, The front sub-frame body 100 and the vehicle body are detachably connected by threaded fasteners passing through the hollow positioning pin 5 .

In this embodiment, the front sub-frame is cast and machined from an aluminum alloy material, that is, the blank of the front sub-frame is first cast and then machined and finished.

The above describes the technical principle of the utility model in conjunction with specific embodiments, but it should be noted that the above descriptions are only for explaining the principle of the utility model, and cannot be interpreted in any way as specific limitations on the protection scope of the utility model. Based on the explanations herein, those skilled in the art can think of other specific implementations or equivalent replacements of the utility model without creative effort, and all of them will fall within the protection scope of the utility model.

Claims (9)

1. A front subframe, characterized in that it comprises a subframe body roughly in the shape of a square frame, the subframe body is integral and enclosed by a front crossbeam, a rear crossbeam and two longitudinal beams of the same specification form; Wherein, the front crossbeam, the rear crossbeam and the longitudinal beam are all channel-shaped beams with an open bottom, and several reinforcing ribs are arranged in the channel-shaped beams; Each of the longitudinal beams has a built-in pair of hinge seats for hinged swing arms, and each of the hinge seats is composed of two adjacent reinforcing ribs; The hinge seat opens a gap to the outside of the sub-frame body. 2. The front sub-frame according to claim 1, characterized in that, in each of the hinge seats, two of the reinforcing ribs are parallel to each other. 3. The front sub-frame according to claim 1, characterized in that, the top of the rear beam is integrated with a power system suspension bracket. 4. The front sub-frame according to claim 1, characterized in that, a set of steering gear mounting seats is also integrated on the rear side wall of the rear cross member. 5. The front sub-frame according to claim 1 or 4, wherein a stabilizer bar bracket is respectively fixed on the top of the front end of each of the longitudinal beams. 6. The front subframe according to claim 1, wherein a hollow positioning pin is respectively arranged on the top of the front end and/or rear end of the subframe body, and the front subframe body and the vehicle body The threaded fasteners passing through the hollow positioning pins are detachably connected between them. 7 . The front sub-frame according to claim 6 , wherein the hollow positioning pins are respectively provided at the right front end and the left rear end of the sub-frame body. 8 . 8. The front sub-frame according to claim 1, characterized in that, the front sub-frame is formed by casting or forging or machining of aluminum alloy material. 9. The front sub-frame according to claim 1, characterized in that, the front sub-frame is cast and machined from an aluminum alloy material; Alternatively, the front sub-frame is forged and machined from an aluminum alloy material.