Automobile rear overhang metal plate spring arm

Abstract

The utility model relates to an automobile rear overhang metal plate spring arm which comprises a sleeve, a spring arm body formed by stamping a metal plate and a reinforcing plate, the first end of the spring arm body is provided with the sleeve used for being connected with an auxiliary frame, the second end of the spring arm body is provided with a large U-shaped notch used for being connected with a steering knuckle, and the spring arm body is of a ship-shaped structure with two narrow ends and a wide middle portion. The two sides of an opening in the middle of the upper end of the spring arm body are each provided with a folded edge folded outwards multiple times, the reinforcing plate comprises an extending cutting piece and a reinforcing plate body, one end of the reinforcing plate body is connected with the extending cutting piece through an arc transition plate, and height difference exists between the extending cutting piece and the reinforcing plate body. The two sides of the reinforcing plate body are fixedly welded to the two folded edges respectively, and the extending-out cutting piece extends into the inner wall of the first end of the spring arm body and is fixedly welded to the inner wall of the first end of the spring arm body. According to the utility model, the purpose of light weight can be achieved while the requirements of strength and fatigue are met.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a rear suspension sheet metal spring arm for automobiles. Background Technology

[0002] Rear suspension spring arms are commonly used in multi-link rear suspensions. One end connects to the steering knuckle, the other end is fitted with a bushing and connected to the subframe, and the middle section near the steering knuckle connects to the shock absorber and also to the spring. Besides bearing the forces transmitted from the road surface, they also have to withstand the load caused by the vehicle's weight changing with road conditions, resulting in complex stress distribution and high design difficulty. Traditional automotive rear suspension spring arms have relatively low strength and stiffness, and are generally heavy, making lightweighting impossible. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a rear suspension sheet metal spring arm for automobiles that can achieve the purpose of lightweighting while meeting the requirements of strength and fatigue.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A rear suspension sheet metal spring arm for automobiles is provided, comprising a sleeve, a spring arm body formed by sheet metal stamping, and a reinforcing plate. The first end of the spring arm body is fitted with a sleeve for connecting to the subframe, and the second end is provided with a large U-shaped cut for connecting the steering knuckle. The spring arm body has a boat-shaped structure that is narrow at both ends and wide in the middle. Both sides of the opening at the upper middle part of the spring arm body are provided with outwardly folded edges. The reinforcing plate includes an extended slice and a reinforcing plate body. One end of the reinforcing plate body is connected to the extended slice via an arc transition plate, and there is a height difference between the extended slice and the reinforcing plate body. The two sides of the reinforcing plate body are welded and fixed to the two folded edges respectively. The extended slice extends into the inner wall of the first end of the spring arm body and is welded together.

[0005] As a supplement to the technical solution described in this utility model, a circular plane for supporting the spring is provided on the bottom surface of the middle part of the spring arm body. The center of the circular plane is provided with an upwardly arched protrusion. A circular hole is provided at the center of the upper end of the protrusion. An anti-rotation positioning hole is provided on one side of the protrusion on the circular plane.

[0006] As a supplement to the technical solution described in this utility model, the bottom of the spring arm body has a square through hole and a triangular through hole.

[0007] As a supplement to the technical solution described in this utility model, the folded edge is provided with multiple waist-shaped punches.

[0008] As a supplement to the technical solution described in this utility model, the end of the folded edge near the first end of the spring arm body is provided with a variable cross-section cut, and the end of the folded edge near the second end of the spring arm body is provided with an arc-shaped cut.

[0009] As a supplement to the technical solution described in this utility model, the first end of the spring arm body is provided with a circular cutout, which is attached to the sleeve and fixed by welding.

[0010] As a supplement to the technical solution described in this utility model, the reinforcing plate is triangular in shape, and the main body of the reinforcing plate has multiple round holes and multiple waist holes in the middle, and the other end of the main body of the reinforcing plate has a large arc cut.

[0011] As a supplement to the technical solution described in this utility model, a reinforcing insert is welded to the inner wall of the middle part of the spring arm body. The reinforcing insert is an inverted U-shaped arc plate with a U-shaped cutout at the middle of the lower end of the arc plate, and the U-shaped cutout is arranged towards the second end of the spring arm body.

[0012] As a supplement to the technical solution described in this utility model, the bottom of the spring arm body is provided with a plurality of stamped bosses, and a circular hole is provided in the middle of the upper end of the stamped bosses.

[0013] As a supplement to the technical solution described in this utility model, two concave pits are symmetrically arranged on the upper part of the inner walls on both sides of the second end of the spring arm body.

[0014] Beneficial Effects: This utility model relates to a rear suspension sheet metal spring arm for automobiles. The spring arm body is formed by stamping high-strength sheet metal, and its strength is further increased by welding reinforcing plates and reinforcing inserts. Both sides of the upper opening of the spring arm body are provided with outwardly folded edges, which effectively enhance the overall rigidity of the product. Variable cross-section cuts and arc-shaped cuts are also designed to achieve a smooth transition, thereby improving the reduced lifespan caused by material reduction. The concave punch not only meets the requirements for obstacle avoidance but also reinforces the area. The reinforcing insert is an inverted U-shaped arc plate with a U-shaped cut in the middle of its lower end. This structure of the reinforcing insert can improve local rigidity and fatigue resistance within a very small space. The structure of this utility model can meet the requirements of high-strength working conditions with high boundary requirements and effectively reduce costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the spring arm body described in this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the reinforcing plate described in this utility model;

[0018] Figure 4 This is a schematic diagram of the reinforcing insert described in this utility model.

[0019] Illustration: 1. Sleeve, 2. Spring arm body, 3. Reinforcing plate, 4. Reinforcing insert, 5. Welded nut, 200. Circular plane, 201. Circular cut, 202. Variable cross-section cut, 203. Waist-shaped punch, 204. Arc-shaped cut, 205. Square through hole, 206. Connecting hole, 207. Three round holes, 208. Large U-shaped cut, 209. Concave punch, 210. Anti-rotation positioning hole, 211. Protrusion, 212. One round hole, 213. Stamped boss, 214. Triangular through hole, 215. Folded edge, 216. Stamped boss hole, 301. Extended slice, 302. Waist hole, 303. Two round holes, 304. Arc cut, 305. Reinforcing plate body, 306. Arc transition plate, 401. U-shaped cut. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0021] The embodiments of this utility model relate to a rear suspension sheet metal spring arm for automobiles, such as... Figure 1-4 As shown, the device includes a sleeve 1, a spring arm body 2 formed by sheet metal stamping, and a reinforcing plate 3. The first end of the spring arm body 2 is fitted with a sleeve 1 for connecting to the subframe, and the second end has a large U-shaped cutout 208 for connecting the steering knuckle. The large U-shaped cutout 208 not only reduces weight but also decreases the opening stiffness, making it easier to tighten during connection. The spring arm body 2 has a boat-shaped structure that is narrow at both ends and wide in the middle. Both sides of the opening at the upper middle part of the spring arm body 2 are provided with outwardly folded edges 215. The folded edge 215 can effectively enhance the overall rigidity of the product. The reinforcing plate 3 includes an extended slice 301 and a reinforcing plate body 305. One end of the reinforcing plate body 305 is connected to the extended slice 301 through an arc transition plate 306, and there is a height difference between the extended slice 301 and the reinforcing plate body 305. The two sides of the reinforcing plate body 305 are respectively welded and fixed to the two folded edges 215. The extended slice 301 extends into the inner wall of the first end of the spring arm body 2 and is fixed together by welding.

[0022] The bottom surface of the middle part of the spring arm body 2 is provided with a circular plane 200 for supporting the spring. The middle part of the circular plane 200 is provided with an upwardly arched protrusion 211. A circular hole 212 is opened in the middle of the upper end of the protrusion 211. An anti-rotation positioning hole 210 is opened on the circular plane 200 on one side of the protrusion 211. The shock-absorbing spring is sleeved on the outside of the protrusion 211, and one end of the spring is connected and limited by the anti-rotation positioning hole 210.

[0023] As a preferred embodiment of the spring arm body 2, the bottom of the spring arm body 2 has a square through hole 205 and a triangular through hole 214. Setting the square through hole 205 and the triangular through hole 214 can effectively reduce the weight of the spring arm body 2.

[0024] As a preferred option for the folded edge 215, the folded edge 215 is provided with a plurality of waist-shaped punch holes 203. The waist-shaped punch holes 203 can first meet the requirements for wire harness installation, and can also reduce weight to a certain extent.

[0025] As a preferred embodiment of the folded edge 215, the folded edge 215 is provided with a variable cross-section cut 202 at one end near the first end of the spring arm body 2, and an arc-shaped cut 204 at one end near the second end of the folded edge 215. The variable cross-section cut 202 and the arc-shaped cut 204 are designed to achieve a smooth transition, thereby improving the problem of reduced lifespan caused by material reduction.

[0026] The first end of the spring arm body 2 is provided with a circular cutout 201, which is attached to the sleeve 1 and fixed by welding.

[0027] As a preferred embodiment of the reinforcing plate 3, the reinforcing plate 3 is triangular in shape, and the main body 305 of the reinforcing plate has multiple round holes 303 and multiple waist holes 302 in the middle, and the other end of the main body 305 of the reinforcing plate has a large arc cutout 304.

[0028] As a preferred embodiment of the reinforcing insert 4, a reinforcing insert 4 is welded to the inner wall of the middle part of the spring arm body 2. The reinforcing insert is an inverted U-shaped arc plate with a U-shaped cutout 401 at the lower center, which is arranged towards the second end of the spring arm body 2. This type of reinforcing insert 4 can improve local stiffness and fatigue in a very small space.

[0029] The bottom of the spring arm body 2 has multiple stamped bosses 213, and a circular hole 207 is formed in the middle of the upper end of each stamped boss 213. Stamped boss holes 216 are symmetrically arranged on the inner walls of both sides of the second end of the spring arm body 2. The stamped bosses 213 can be punched with planar features, making it easier to ensure flatness. The circular hole 207 in the middle is used to pass bolts or locating pins.

[0030] As a preferred option, two concave grooves 209 are symmetrically arranged on the upper part of the inner walls on both sides of the second end of the spring arm body 2. The concave grooves 209 can not only meet the avoidance requirements, but also strengthen the area.

[0031] Two stamped boss holes 216 and two connecting holes 206 are symmetrically arranged on the inner walls of both sides of the second end of the spring arm body 2. Welded nuts 5 are provided on the outer side of the stamped boss hole 216 and the connecting hole 206 on one side. The two connecting holes 206 are connected to the shock absorber by bolts, and the two stamped boss holes 216 are connected to the steering knuckle by bolts.

[0032] The advantage of this rear suspension sheet metal spring arm is that this structure can meet the requirements of high-strength working conditions under relatively high boundary requirements, and effectively reduce costs.

[0033] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0036] The above provides a detailed description of a rear suspension sheet metal spring arm for automobiles. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A rear suspension sheet metal spring arm for automobiles, comprising a sleeve (1), a spring arm body (2) formed by sheet metal stamping, and a reinforcing plate (3), characterized in that: The first end of the spring arm body (2) is equipped with a sleeve (1) for connecting the subframe, and the second end is provided with a large U-shaped cut (208) for connecting the steering knuckle. The spring arm body (2) is a boat-shaped structure that is narrow at both ends and wide in the middle. Both sides of the opening at the middle of the upper end of the spring arm body (2) are provided with outwardly folded edges (215). The reinforcing plate (3) includes an extended slice (301) and a reinforcing plate body (305). One end of the reinforcing plate body (305) is connected to the extended slice (301) through an arc transition plate (306), and there is a height difference between the extended slice (301) and the reinforcing plate body (305). The two sides of the reinforcing plate body (305) are welded and fixed to the two folded edges (215) respectively. The extended slice (301) extends into the inner wall of the first end of the spring arm body (2) and is fixed together by welding.

2. The automotive rear suspension sheet metal spring arm according to claim 1, characterized in that: The bottom surface of the middle part of the spring arm body (2) is provided with a circular plane (200) for supporting the spring. The middle part of the circular plane (200) is provided with an upward arched protrusion (211). A circular hole (212) is opened in the middle of the upper end of the protrusion (211). An anti-rotation positioning hole (210) is opened on the circular plane (200) on one side of the protrusion (211).

3. The automotive rear suspension sheet metal spring arm according to claim 1, characterized in that: The bottom of the spring arm body (2) has a square through hole (205) and a triangular through hole (214).

4. The automotive rear suspension sheet metal spring arm according to claim 1, characterized in that: The folded edge (215) is provided with multiple waist-shaped punch holes (203).

5. The automotive rear suspension sheet metal spring arm according to claim 1, characterized in that: The folded edge (215) has a variable cross-section cut (202) at one end near the first end of the spring arm body (2), and an arc-shaped cut (204) at one end near the second end of the folded edge (215).

6. The automotive rear suspension sheet metal spring arm according to claim 1, characterized in that: The first end of the spring arm body (2) is provided with a circular cutout (201), which is attached to the sleeve (1) and fixed by welding.

7. The automotive rear suspension sheet metal spring arm according to claim 1, characterized in that: The reinforcing plate (3) is triangular in shape. The main body (305) of the reinforcing plate has multiple round holes (303) and multiple waist holes (302) in the middle. The other end of the main body (305) of the reinforcing plate has a large arc cut (304).

8. The automotive rear suspension sheet metal spring arm according to claim 1, characterized in that: A reinforcing insert (4) is welded to the inner wall of the middle part of the spring arm body (2). The reinforcing insert (4) is an inverted U-shaped arc plate with a U-shaped cut (401) at the middle of the lower end of the arc plate. The U-shaped cut (401) is arranged towards the second end of the spring arm body (2).

9. A rear suspension sheet metal spring arm for automobiles according to claim 1, characterized in that: The bottom of the spring arm body (2) is provided with a plurality of stamped bosses (213), and a circular hole (207) is provided in the middle of the upper end of the stamped bosses (213).

10. A rear suspension sheet metal spring arm for automobiles according to claim 1, characterized in that: Two concave pits (209) are symmetrically arranged on the upper part of the inner walls on both sides of the second end of the spring arm body (2).

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