CN211106803U - Link arm structure and multi-link suspension - Google Patents

Abstract

A link arm structure includes a link arm body and a U-shaped bracket that are connected to each other, the U-shaped bracket includes a connecting part and two clamping units symmetrically connected to both sides of the connecting part, and the connecting part is Symmetrical nine-sided connection structure, the connection part includes a link arm body connection area connected with the link arm body and two clamping unit connection areas respectively connected with the two clamping units. The clamping unit connection areas are symmetrically arranged on both sides of the link arm body connection area. In the link arm structure provided by the utility model, the connecting part of the U-shaped bracket adopts a nine-sided structure with profile splicing, and the structure is compact. Compared with the conventional U-shaped bracket, the static strength and buckling strength can be improved by about 30% , so that the reliability of the link arm structure is greatly improved.

Description

Link arm structure and multi-link suspension

technical field

The utility model relates to the technical field of suspension, in particular to a link arm structure and a multi-link suspension.

Background technique

In a multi-link suspension, there are usually multiple link arms arranged in a certain direction, which are horizontal links when arranged in the transverse direction of the vehicle (Y direction), and longitudinal links when arranged along the longitudinal direction of the vehicle (X direction). One end is connected to the subframe or the body through a bushing, and the other end is connected to the axle knuckle and the wheel through a bushing or bracket, which mainly bears the longitudinal and lateral forces of the whole vehicle.

When designing the link arm, it is necessary to take into account the requirements of strength, light weight and cost. In the actual use of the link arm, the link arm is required to have sufficient static strength and buckling strength, and the connection between the link arm and the U-shaped bracket needs to be strengthened. The link arm in the prior art usually includes a simple U-shaped sheet metal bracket, a connecting rod body and a sleeve. As shown in FIG. 1 , the strength and reliability of the U-shaped sheet metal bracket is not high.

Utility model content

The purpose of the present invention is to provide a link arm structure with increased strength.

The technical solution adopted by the utility model to solve the technical problem is: a link arm structure, comprising a U-shaped bracket, a link arm body and a sleeve, the U-shaped bracket and the sleeve are respectively connected to the connecting rod The two ends of the arm body, the U-shaped bracket includes a connecting portion and two clamping units symmetrically connected to both sides of the connecting portion, the connecting portion is a nine-sided connecting structure, and the connecting portion includes a The link arm body connection area connected with the link arm body and the two clamping unit connection areas respectively connected with the two clamping units, the two clamping unit connection areas are symmetrically arranged in the connection area. Both sides of the connecting area of the lever arm body.

Further, both the connecting region of the link arm body and the connecting region of the clamping unit include three surfaces.

Further, the shape of the clamping unit is a regular octagon.

Further, a rounded transition structure is formed between the nine surfaces of the connecting portion and between the connecting portion and each of the clamping units.

Further, the connecting portion is integrally formed with the clamping unit.

Further, the link arm body includes a main body section and a casing connecting section connected with the casing, and the diameter of the casing connecting section gradually decreases toward the distal end.

Further, the taper angle of the casing connecting section is less than or equal to 5°.

Further, the axial length of the sleeve is equal to the diameter of the main body section of the link arm body.

The utility model also provides a multi-link suspension, which includes the above-mentioned link arm structure.

In the link arm structure provided by the utility model, the connecting part of the U-shaped bracket adopts a nine-sided structure with profile splicing, and the structure is compact. Compared with the conventional U-shaped bracket, the static strength and buckling strength can be improved by about 30% , so that the reliability of the link arm structure is greatly improved.

Description of drawings

The accompanying drawings illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, are included to provide a further understanding of the invention, and are included in the specification and form part of this manual.

1 is a schematic diagram of a prior art link arm structure;

2 is a perspective view of a link arm structure according to an embodiment of the present invention;

3 is a front view of a link arm structure according to an embodiment of the present invention;

4 is a top view of a link arm structure according to an embodiment of the present invention;

5 is a side view of a U-shaped bracket of a link arm structure according to an embodiment of the present invention;

FIG. 6 is a partial enlarged view of the connecting section of the sleeve of the link arm body of the link arm structure according to the embodiment of the present invention.

In the figure: 1- Link arm structure, 2- Link arm body, 21- Main body section, 22- Casing connection section, 3- U-shaped bracket, 4- Connection part, 41- Link arm body connection area, 42 -Clamping unit connection area, 5-Clamping unit, 6-Sleeve, 7-Welding area, Φ-Diameter of the main body section of the link arm body, θ-The taper angle of the sleeve connection section of the link arm body , L - the length of the casing.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related content, rather than limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

It should be noted that the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

2-4, which are various views of the link arm structure 1 according to the embodiment of the present invention. The link arm structure 1 of the present invention includes a U-shaped bracket 3 , a link arm body 2 and a sleeve 6 , and the U-shaped bracket 3 and the sleeve 6 are respectively connected to two ends of the link arm body 2 . The U-shaped bracket 3 includes a connecting portion 4 and two clamping units 5 symmetrically connected to both sides of the connecting portion 4 . The connecting portion 4 is a nine-sided connecting structure, and the connecting portion 4 includes a link arm connected to the link arm body 2 . The body connection area 41 and the two clamping unit connection areas 42 respectively connected with the two clamping units 5 are symmetrically arranged on both sides of the link arm body connection area 41 . In one embodiment, the link arm body 2 is a hollow circular tube with a thickness of 3-4 mm. One end of the link arm body 2 is welded with the U-shaped bracket 3, and the welding position is located on the connecting region 41 of the link arm body of the connecting portion 4 of the U-shaped bracket 3, as shown in the welding area 7 in FIG. 3 . Viewed from top to bottom, the U-shaped bracket 3 is U-shaped.

Referring to Fig. 5, which is a side view of the U-shaped bracket 3 viewed from the direction of the link arm body 2, the connecting portion 4 has a nine-sided structure. Preferably, the connecting region 41 of the link arm body of the connecting portion 4 has three surfaces, and the three surfaces of the connecting region 41 of the connecting portion 4 are located in the middle of the nine-sided structure of the connecting portion 4 . The two clamping unit connection areas 42 respectively have three faces located on both sides of the nine-sided structure of the connection portion 4 , and the clamping unit connection areas 42 are symmetrically distributed on both sides of the link arm body connection area 41 . The three surfaces of the clamping unit connection area 42 are connected correspondingly to the three surfaces of the link arm body connection area 41 . The main body section 21 of the link arm body 2 is connected to the connecting portion 4 through the middle surface of the connecting region 41 of the link arm body. The clamping unit 5 is connected to the three surfaces of the clamping unit connecting region 42 through three sides.

Referring to FIG. 3 , the shape of the clamping unit 5 is preferably a regular octagon. Compared with the clamping unit of the U-shaped bracket in the prior art (as shown in FIG. 1 ), the shape of the regular octagon is symmetrical with respect to the center point, so that the U-shaped bracket 3 is uniformly stressed during use and prolongs the service life of the workpiece.

Referring to FIGS. 2 and 3 , preferably, a rounded transition structure is formed between the nine surfaces of the connecting portion 4 , and this rounded transition structure can enhance the overall strength of the connecting portion 4 . Also preferably, a rounded transition structure is also formed between the connecting portion 4 and each clamping unit 5 .

Preferably, the U-shaped bracket 3 is integrally formed, that is, the connecting portion 4 and the clamping unit 5 are integrally formed. Single-layer sheet metal is used for one-time stamping forming, which has good craftsmanship and is not easy to produce stamping defects such as wrinkles and stacking.

2-4, the link arm body 2 includes a main body section 21 and a casing connecting section 22 connected with the casing 6, the casing 6 and the end of the casing connecting section 22 are welded. Preferably, the diameter of the casing connecting section 22 is gradually reduced toward the end. Such a diameter reduction design can reserve a certain welding space at the end of the casing connecting section 22 to realize welding with the casing 6, so that the design size of the casing can be reduced. , which is conducive to weight reduction and cost reduction, while ensuring welding size and performance. Preferably, referring to FIG. 6 , the tapered angle θ of the casing connecting section 22 is less than or equal to 5°, which can ensure the strength of the end of the casing connecting section 22 .

Referring to FIG. 4 , preferably, the axial length L of the sleeve 6 is equal to the diameter Φ of the main body section 21 of the link arm body 2 . A welding area 7 is formed between the end of the sleeve and the sleeve, and the axial length L of the sleeve 6 is designed to be equal to the diameter Φ of the main body section 21 while ensuring the welding strength. As a result, the sleeve end of the link arm structure 1 can keep the same size in the length direction of the sleeve 6, which is convenient for connection and installation, and occupies a small space.

When in use, the sleeve 6 of the link arm structure 1 is flexibly connected to the subframe through the bushing, and the U-shaped bracket 3 is connected to the axle joint in a tightening and clamping manner through the reinforcing bracket, and then connected to the wheel to realize the guidance and transmission. force action. According to the arrangement direction, the link arm structure 1 mainly bears the longitudinal force and lateral force of the whole vehicle. When subjected to a longitudinal or lateral impact of the wheel, the strength of the link arm structure 1 is sufficient to ensure that the structure will not buckle and deform.

In the link arm structure provided by the utility model, the connecting part of the U-shaped bracket adopts a nine-sided structure with profile splicing, and the structure is compact. Compared with the conventional U-shaped bracket, the static strength and buckling strength can be improved by about 30% , so that the reliability of the link arm structure is greatly improved. In addition, the end of the link arm body of the link arm structure is designed in the form of reduced diameter, which can reduce the use of materials while ensuring its own performance and welding strength, which is beneficial to lightweight design and cost reduction.

Those skilled in the art should understand that the above embodiments are only for clearly illustrating the present invention, rather than limiting the scope of the present invention. For those skilled in the art, other changes or modifications can also be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims (9)

1. A link arm structure (1), characterized in that it comprises a U-shaped bracket (3), a link arm body (2) and a sleeve (6), the U-shaped bracket (3) and the sleeve The pipes (6) are respectively connected to the two ends of the link arm body (2), and the U-shaped bracket (3) includes a connecting part (4) and a symmetrical connecting part (4) on both sides of the connecting part (4). Two clamping units (5), the connecting portion (4) is a nine-sided connecting structure, and the connecting portion (4) includes a link arm body connecting region ( 41) and two clamping unit connection regions (42) respectively connected with the two clamping units (5), the two clamping unit connection regions (42) are symmetrically arranged on the link arm body Connect both sides of the area (41). 2 . The link arm structure ( 1 ) according to claim 1 , wherein the link arm body connection region ( 41 ) and the clamping unit connection region ( 42 ) both comprise three surfaces. 3 . 3. The link arm structure (1) according to claim 2, characterized in that, the shape of the clamping unit (5) is a regular octagon. 4. The link arm structure (1) according to claim 3, characterized in that, between the nine faces of the connecting portion (4) and between the connecting portion (4) and each of the clamping units (5) A rounded transition structure is formed between them. 5 . The link arm structure ( 1 ) according to claim 4 , wherein the connecting portion ( 4 ) and the clamping unit ( 5 ) are integrally formed. 6 . 6. The link arm structure (1) according to claim 1, characterized in that, the link arm body (2) comprises a main body section (21) and a bushing connection connected with the bushing (6) Section (22), the casing connecting section (22) gradually decreases in diameter towards the tip. 7 . The link arm structure ( 1 ) according to claim 6 , wherein the taper angle ( θ ) of the sleeve connecting section ( 22 ) is less than or equal to 5°. 8 . 8 . The link arm structure ( 1 ) according to claim 7 , wherein the axial length (L) of the sleeve ( 6 ) is related to the main body section of the link arm body ( 2 ). 9 . The diameters (Φ) of (21) are equal. 9. A multi-link suspension, characterized in that it comprises the link arm structure of any one of claims 1-8.

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