CN109624633B

CN109624633B - Light-weight lower swing arm

Info

Publication number: CN109624633B
Application number: CN201910014561.XA
Authority: CN
Inventors: 詹爱平; 梁爱云
Original assignee: Anhui Keyuan Machinery Co ltd
Current assignee: Anhui Keyuan Machinery Co ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2020-07-31
Anticipated expiration: 2039-01-08
Also published as: CN109624633A

Abstract

The invention aims to provide a light-weight lower swing arm, which is used for solving the problems in the prior art and comprises a base body and a reinforcing body welded on the upper side of the base body, wherein the base body comprises two frame connecting ends and a knuckle connecting end, the ends of the two frame connecting ends and the knuckle connecting end are mutually connected, a plurality of light-weight holes are formed in the base body, and the reinforcing body comprises two frame reinforcing arms and a knuckle reinforcing arm, wherein the extending direction of the two frame reinforcing arms and the extending direction of the base body are the same. The light-weight lower swing arm has lighter weight compared with the existing double-layer stamping plate structure, and also has good structural strength, so that the light-weight lower swing arm has the advantages of good dynamic responsiveness, high structural strength, high fatigue resistance, difficulty in fracture and the like.

Description

Light-weight lower swing arm

Technical Field

The invention relates to the technical field of automobile parts, in particular to a light-weight lower swing arm.

Background

The lower swing arm is a connecting piece between a frame and wheels of a vehicle, and a common lower swing arm is provided with three connecting ends which are in triangular structures and are respectively connected with the wheels and the frame. At present, a common lower swing arm usually adopts a structure combined by double-layer plate-shaped stamping parts, the overall weight of the lower swing arm is overlarge due to the structure, the motion state of a vehicle is not good due to large inertia caused by the overlarge weight when the vehicle turns or runs on a rough road, and the feeling of a driver and passengers is poor due to slow rotation and buffer response. Some manufacturers adopt a single-layer stamping part structure for improving dynamic responsiveness, and although the structure has lighter weight, the structure has poor strength and is easy to break due to problems such as fatigue damage and the like, so that the life safety of personnel in the vehicle is affected.

Disclosure of Invention

The invention aims to provide a light-weight lower swing arm, which is used for solving the problems in the prior art, has lighter weight compared with the prior double-layer stamping plate structure, and also has good structural strength, thereby having the advantages of good dynamic response, high structural strength, high fatigue resistance, difficult fracture and the like.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

the light-weight lower swing arm comprises a base body and a reinforcing body welded on the upper side of the base body, wherein the base body comprises two frame connecting ends and a knuckle connecting end, the ends of the two frame connecting ends and the knuckle connecting end are in an arm shape and are connected with each other, a plurality of light holes are formed in the base body, and the reinforcing body comprises two frame reinforcing arms and a knuckle reinforcing arm, and the two frame reinforcing arms and the knuckle reinforcing arm are the same as the extending direction of the base body.

Preferably, the frame reinforcing arm is provided with at least one buffer joint, the buffer joint comprises at least two arched buffer plates with opposite openings, and the buffer joint is located at the light weight hole in the projection direction.

Preferably, the buffer plate has surface hardening layers on upper and lower sides thereof.

As a preferable aspect of the present invention, the knuckle reinforcing arm has a shape surrounding the end edge of the knuckle attachment end, and the knuckle reinforcing arm has an arcuate shape opening downward in cross section.

Preferably, the light holes are triangular, and adjacent sides between adjacent light holes are parallel.

Preferably, three angles of the light-weight hole triangle are arc angles.

Preferably, the edge of the base body is provided with a flange, and the reinforcing body is provided with a plurality of connecting parts which extend towards two sides and are welded with the flanges.

Preferably, the base and the reinforcement are spaced apart from each other.

Preferably, the flange has a right-angled triangular connecting plate at a welding position with the connecting part.

Preferably, one side of the right-angle edge of the connecting plate is welded on the inner side of the flanging, and the other side of the right-angle edge of the connecting plate is abutted against the lower surface of the connecting part.

The invention has the beneficial effects that:

1. the light weight holes are formed in the base body, so that the weight of the base body serving as the lower swing arm main body can be effectively reduced, the purpose of light weight is achieved, meanwhile, the arm-shaped reinforcing body is used for structurally reinforcing the base body, and the arm-shaped reinforcing body is guaranteed to have high structural strength after being perforated;

2. the buffer joint, the buffer plate and the surface hardening layer of the buffer plate can provide bending resistance and fatigue resistance when the lower swing arm is subjected to dynamic bending moment of a vehicle, so that enough fatigue resistance is ensured and fracture is avoided;

3. the frame type double-layer structure between the base body and the reinforcing body formed by the turned-over edges and the connecting parts can effectively improve structural strength and ensure light overall weight.

Drawings

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic top view of a substrate according to the present invention;

FIG. 3 is a schematic view of the structure of the present invention at the junction;

FIG. 4 is a schematic view of a buffer node according to the present invention;

FIG. 5 is a schematic view of the structure at the reinforcing arm of the knuckle of the present invention;

the items in the figure are respectively: the

main body

1, 11 frame connecting ends, 12 knuckle connecting ends, 13 light holes, 14 turned edges, 141 connecting plates, 2 reinforcing bodies, 21 frame reinforcing arms, 22 knuckle reinforcing arms, 23 connecting parts, 3 buffer knuckles, 31 buffer plates and 311 surface hardening layers.

Detailed Description

The invention is described in detail below with reference to the attached drawing figures:

a light-weight lower swing arm as shown in figures 1 and 2 comprises a base body 1 formed by stamping and a reinforcing body 2 welded on the upper side of the base body 1, wherein the base body 1 comprises two frame connecting ends 11 and a knuckle connecting end 12, one end of each frame connecting end 11 is connected with each other in a three-fork arm shape, the end of each frame connecting end 11 is provided with a sleeve-type connecting device used for forming a hinge connection with a frame, and a universal connecting device in a ball-and-socket type at the position of the knuckle connecting end 12 is used for forming a connection with a knuckle. The base body 1 is stamped with a plurality of light holes 13. The reinforcement 2 is also a stamped part and includes two frame reinforcement arms 21 and a knuckle reinforcement arm 22 extending in the same direction as the base 1.

In the present embodiment, as shown in fig. 4, the frame reinforcing arm 21 has a plurality of buffer segments 3 disposed along the extending direction thereof, and the buffer segments 3 include at least three arched buffer plates 31 formed by stamping and having opposite openings, wherein two buffer plates 31 are formed by two buffer plates with downward openings and one buffer plate is formed by one buffer plate with upward openings, and the buffer plate 31 with upward openings is located between the two buffer plates with downward openings, so as to have a better mechanical balance structure. The damper node 3 is located at the light weight hole 13 in the projection direction, so that the damper plate 31, which is open upward, is deformed downward without interfering with the base body 1 when being deformed under pressure. In the vehicle operation process, the lower swing arm can be in the extrusion and bending working state generally, the buffer joint 3 forms a buffer structure in a plate spring form through the opposite buffer plates 31, and the reaction force to the extrusion force and the bending force can be effectively formed through the elastic force of the buffer joint, so that the total value of the resultant force acting on the lower swing arm is small, and the risk of loading and fatigue damage is reduced.

In this embodiment, the upper and lower sides of the buffer plate 31 have the surface hardening layer 311, after surface hardening, the upper and lower sides of the buffer plate 31 have better hardness, wear resistance and fatigue strength, and the center still has higher toughness, so that under the long-term and frequent-alternating extrusion bending working condition when the vehicle is running, the surface hardening layer 311 enables the buffer plate 31 to have better durability as an elastic buffer structure, and meanwhile, the residual stress of the surface hardening layer 311 after hardening also enables the buffer plate 31 to have better fatigue resistance.

In this embodiment, as shown in fig. 5, the knuckle reinforcement arm 22 is shaped to surround the edge of the knuckle attachment end 12, and the knuckle reinforcement arm 22 is bowed with an opening in the downward direction, which also contributes to fatigue and crumple resistance at the knuckle reinforcement arm 22.

In this embodiment, the light weight holes 13 are triangular, and the adjacent sides between the adjacent light weight holes 13 are parallel, that is, the spacing distances between the adjacent light weight holes 13 are equal, so as to ensure the structural stability of the base 1 itself and reduce the mechanical weak points on the structure. Three triangular corners of the light holes 13 are arc corners, so that the mechanical structure is optimized at the triangular corners, and structural weakness caused by sharp corners is reduced.

In the present embodiment, as shown in fig. 3, the base 1 has an upward flange 14 at its edge, and the reinforcement body 2 has a plurality of ribs 23 extending laterally and welded to the flange 14. The base 1 and the reinforcement 2 are spaced apart from each other at a predetermined distance. Thus, a porous frame structure is formed between the base 1 and the reinforcement 2, and good strength is maintained while reducing the physical volume and weight.

In the present embodiment, the flange 14 has a right-angled triangular connecting plate 141 at the welding point with the connecting portion 23. One side of the connecting plate 141 is welded to the inner side of the flange 14, and the other side is stopped against the lower surface of the connecting part 23. The connecting plate 141 supports the connecting portion 23 by its structure, and improves the connection stability between the base body 1 and the reinforcing body 2, and the connecting plate 141 in this embodiment is also welded to the lower surface of the connecting portion 23.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention fall into the protection scope of the present invention, and the technical contents of the present invention which are claimed are all described in the claims.

Claims

1. A light-weight lower swing arm comprises a base body (1) and a reinforcing body (2) welded to the upper side of the base body (1), wherein the base body (1) comprises two frame connecting ends (11) and a knuckle connecting end (12) which are connected with each other at the ends, and is characterized in that a plurality of light holes (13) are formed in the base body (1), and the reinforcing body (2) comprises two frame reinforcing arms (21) and a knuckle reinforcing arm (22) which are the same as the extending direction of the base body (1);

the frame reinforcing arm (21) is provided with at least one buffer joint (3), the buffer joint (3) comprises at least two arched buffer plates (31) with opposite openings, and the buffer joint (3) is positioned at the light hole (13) in the projection direction;

the edge of the base body (1) is provided with a flange (14), the reinforcing body (2) is provided with a plurality of connecting parts (23) which extend towards two sides and are welded with the flange (14), and the upper side and the lower side of the buffer plate (31) are provided with surface hardening layers (311).

2. A lightweight lower swing arm according to claim 1, wherein the knuckle reinforcement arm (22) is shaped around the edge of the knuckle attachment end (12), the knuckle reinforcement arm (22) being arcuate in cross-section with the opening facing downwards.

3. A lightweight lower swing arm according to claim 1, wherein the light holes (13) are triangular, and adjacent sides between adjacent light holes (13) are parallel.

4. A lightweight lower swing arm according to claim 3, characterized in that the three angles of the triangle of the lightweight holes (13) are circular arc angles.

5. A lightweight lower swing arm according to claim 1, wherein the base body (1) is spaced apart from the reinforcement body (2).

6. A lightweight lower swing arm according to claim 5, characterized in that the flanges (14) have right-angled triangular webs (141) at the welding with the connection (23).

7. A lightweight lower swing arm according to claim 6, characterized in that one side cathetus of the connecting plate (141) is welded to the inside of the flange (14) and the other side cathetus abuts against the lower surface of the connecting part (23).