Light support base

Abstract

The invention relates to a light support base which is formed by oppositely installing two same half support bases. The two wing ends are arranged on the edges of the two circumferential sides of the semicircular barrel and extend outwards in the radial direction of the semicircular barrel, and the base body is perpendicularly arranged on the edge of the bottom of the semicircular barrel and the edges of the bottoms of the two wing ends and extends towards the side away from the center line of the semicircular barrel. The reinforcing ribs are simultaneously connected with the seat body and the outer surface of the semicircular cylinder body; mounting screw holes are formed in the two wing ends, fixing screw holes are formed in the base, and limiting holes are formed in the semicircular barrel; the semi-support base is made of materials with the density smaller than 1.4 g / cm < 3 > and the yield strength larger than 150 MPa.

Description

Technical Field

[0001] The invention relates to a lightweight bracket base, which is suitable for use as a base at the junction of a non-load-bearing component of an automobile and a vehicle body, and achieves lightweighting of the automobile while ensuring sufficient strength and service life. Background Art

[0002] As cars become increasingly common, the energy consumption and environmental pollution associated with traditional fuel vehicles are becoming increasingly severe. Furthermore, with the rapid rise of new energy vehicles in recent years, their range has become a focus of widespread industry attention. For both traditional fuel vehicles and new energy vehicles, vehicle weight is a significant factor influencing fuel consumption and range.

[0003] Therefore, automobile manufacturers, while ensuring that the vehicle structure is safe and meets requirements, regard lightweighting as one of the important improvement goals, hoping to reduce the weight of the vehicle body to the maximum extent, thereby slowing down energy consumption and alleviating environmental problems caused by emissions, or effectively increasing the endurance of new energy vehicles. Summary of the Invention

[0004] The present invention provides a lightweight bracket base suitable for use as a base for the connection between a non-load-bearing component and the vehicle body, achieving vehicle lightweighting while ensuring sufficient strength and longevity. Such non-load-bearing components can include, for example, truck taillight brackets and fender brackets, which do not bear vehicle loads and have less stringent strength requirements.

[0005] The present invention aims to provide a lightweight support base, which is formed by two identical half-support bases installed relative to each other. The half-support base includes a semicircular cylinder, two wing ends arranged on the circumferential edges of the semicircular cylinder and extending radially outward along the semicircular cylinder, a seat body vertically arranged on the bottom edge of the semicircular cylinder and the bottom edges of the two wing ends and extending toward the side away from the center line of the semicircular cylinder, and reinforcing ribs connecting the seat body and the outer surface of the semicircular cylinder; both wing ends are provided with mounting screw holes, the base is provided with fixing screw holes, and the semicircular cylinder is provided with limiting holes. The half-support base is made of a material with a density of less than 1.4g / cm 3 And it is made of a material with a yield strength greater than 150MPa.

[0006] Non-load-bearing parts of automobiles (non-load-bearing parts in this disclosure refer to parts that do not carry the vehicle's load, not parts that bear no load at all; they typically carry very light loads, such as taillight brackets and fender brackets) are typically constructed of carbon steel pipes. These components are often bolted to a cast steel base, which is then bolted to the vehicle body structure. These components only carry relatively light weight and do not require stringent strength during service. Therefore, from a lightweight perspective, the inventors explored replacing the cast steel base with a lightweight, high-specific-strength material to reduce the vehicle's weight.

[0007] Therefore, the present invention designs a lightweight bracket base, which is achieved by placing the bracket steel pipe between two half brackets, installing the two half bracket bases relative to each other, and installing bolts in the mounting screw holes at the wing ends for fastening, thereby achieving the control of the bracket. Then, the bracket and the base are fixed to the vehicle body by installing bolts in the fixing screw holes on the base.

[0008] In order to ensure that the bracket base has good strength, the present invention provides reinforcing ribs connected to the base body and the cylinder body, thereby improving the stability of the connection between the bracket steel pipe and the vehicle body. In addition, the wing ends on both sides of the cylinder body also objectively play the role of reinforcing ribs, which can ensure the high reliability of the connection between the bracket and the vehicle body.

[0009] In order to prevent the bracket from rotating circumferentially or displacing in the center line (i.e., axial) direction of the base during service, the present invention also deliberately provides limiting holes on the semicircular cylinder. The limiting holes on the two half-bracket bases are symmetrically distributed around the center line of the base. Two limiting holes are also opened at the corresponding positions of the bracket steel pipe. When the bracket steel pipe is installed into the bracket base, a limiting pin is inserted into the limiting holes of the semicircular cylinder and the steel pipe, thereby realizing reliable locking of the bracket and the bracket base in the circumferential and axial positions.

[0010] Preferably, the limit pin can be through-hole, that is, it passes through the limit hole of one of the half-bracket bases, passes through the two limit holes of the bracket steel pipe in sequence, and then passes out from the limit hole of the other half-bracket base, thereby achieving the locking of the bracket steel pipe and the bracket. Since the limit pin will bear more complex loads in the process of circumferential and axial locking of the bracket, the limit pin is preferably made of carbon steel, cast steel, etc., with a diameter controlled within 6mm and a length that meets the penetration and fixation requirements. The limit pin can be a cylindrical rod. Of course, as a preference, it can be a long through bolt, which is also convenient for fixing it with a nut at the other end.

[0011] As a preferred technical solution, the reinforcing rib is arranged in the middle of the two wing ends, so as to ensure uniform load distribution and improve service stability.

[0012] As a further improvement, when the reinforcing rib is set in the middle of the two wing ends, it is preferred to set the limiting hole directly above the reinforcing rib. In this case, there can be one or two limiting holes. If there are two, the two limiting holes are set in sequence along the axis of the cylinder.

[0013] Without being limited to the above description, when the reinforcing rib is set in the middle of the two wing ends, it is preferred to set two limiting holes, one of which is set on the midline of the curved surface of the cylinder body sandwiched between the reinforcing rib and one of the wing ends, and the other limiting hole is set on the midline of the curved surface of the cylinder body sandwiched between the reinforcing rib and the other wing end. That is, the center lines of the two limiting holes are perpendicular to each other in space, but the two are staggered in the direction of the cylinder axis, thereby avoiding interference with each other when the integral limiting pin is subsequently inserted. This limiting hole design structure has been proven to have the best stability and is the most effective in preventing circumferential rotation and axial displacement of the bracket steel pipe.

[0014] It is best not to set more than 3 limiting holes on the half-bracket base. Too many limiting holes will affect the continuity of the half-bracket base body, destroy its structural stability, and greatly reduce its service reliability. The limiting holes on the half-bracket base are preferably set to 1-2.

[0015] The bottom of the seat body, the bottom of the semicircular cylinder, and the bottoms of the two wing ends are flush. This can simplify the preparation of the bracket base on the one hand, and on the other hand, keep the installation contact part of the bracket base and the vehicle body flush, thereby improving installation efficiency and installation quality.

[0016] In addition, the lightweight bracket base proposed in the present invention has a semi-bracket base whose inner wall of the cylinder is a smooth semicircular surface with only limiting holes passing through it. It does not contain structures such as splines and protrusions. Because such a structure will lead to the complication of the manufacturing process and the subsequent bracket assembly process, it is not conducive to improving the production and assembly efficiency, and the subsequent service life is not ideal.

[0017] In order to achieve the best lightweight effect without affecting the function of the relevant bracket, the present invention adopts a density of less than 1.4g / cm 3 The bracket base is made of a material with a yield strength greater than 150 MPa. As a non-limiting description, this material may preferably be PA66GF30, PA66CF30, etc.

[0018] The yield strength of PA66GF30 is about 170MPa and the density is 1.38g / cm 3 The yield strength of PA66CF30 is higher at 220MPa and the density is lower at 1.28g / cm 3The above two materials are suitable for the present invention as the material of the lightweight bracket. Of course, the materials suitable for the present invention are not limited to the above description, as long as the density is less than 1.4g / cm 3 Any material with a yield strength greater than 150 MPa can be used to prepare the bracket base of the present invention.

[0019] As mentioned above, the lightweight bracket base of the present invention is suitable for use in automobile parts, and is particularly suitable for use as a base at the junction of the non-load-bearing part (non-body load-bearing part) of the automobile and the body. Such a base can be, for example, the base of a fender bracket, the base of a rear taillight bracket, etc.

[0020] The present invention aims to reduce the weight of automobile parts. The base of the bracket of the non-load-bearing component is made of a material with high specific strength, replacing the traditional cast steel base. On the one hand, it can reduce the weight of automobile parts, and the weight reduction ratio can reach more than 82% (based on the density of cast steel 7.8g / cm 3 calculation), on the other hand, the installation process is also relatively simple and does not require welding. In addition, the present invention also improves the structure of the bracket base. A limit hole is set on the bracket base. The use of a limit pin passing through can effectively fix the bracket steel pipe to prevent its circumferential rotation and axial displacement; the provision of reinforcing ribs can ensure that the cylinder and the base have a high connection strength. The wing ends on both sides facilitate the installation of the two half bracket bases on the one hand, and on the other hand, the wing ends also objectively play the role of reinforcing ribs, which can further improve the connection strength between the cylinder and the base, thereby ensuring the reliability of the connection between the bracket and the vehicle body, and ensuring that the lightweight bracket base is stably and effectively connected and has a high safety factor for long-term service. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the half bracket base of the present invention; Figure 2 yes Figure 1 Schematic diagram of the outer surface of the half bracket base (viewed from the side of the reinforcement rib); Figure 3 yes Figure 1 Schematic diagram of the inner surface of the half bracket base; Figure 4 yes Figure 1 Side cross-sectional view of the half-bracket base; Figure 5 yes Figure 1 Top view of the half-bracket base; Figure 6 yes Figure 1 Bottom view of the half-bracket base.

[0022] Figure numerals: 1 - half bracket base; 101 - reinforcing rib; 102 - mounting screw hole; 103 - limiting hole; 104 - fixing screw hole. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to fully understand the technical solutions and beneficial effects of the present invention, further explanation is given below in conjunction with specific test examples.

[0024] like Figure 1 As shown, the lightweight bracket base provided by the present invention is composed of two identical half-bracket bases 1 installed relatively to each other, and the half-bracket base 1 includes a semicircular cylinder, two wing ends arranged on the circumferential side edges of the semicircular cylinder and extending radially outward along the semicircular cylinder, a seat body vertically arranged on the bottom edge of the semicircular cylinder and the bottom edge of the two wing ends and extending toward the side away from the center line of the semicircular cylinder, and reinforcing ribs 101 that simultaneously connect the seat body and the outer surface of the semicircular cylinder.

[0025] The reinforcing rib 101 is arranged in the middle of the two wing ends.

[0026] Two mounting screw holes 102 are provided on each wing end, and two mounting screw holes 102 are provided on the same wing end.

[0027] Two fixing screw holes 104 are provided on the base, and the two fixing screw holes 104 are respectively provided on both sides of the reinforcing rib 101. A limiting hole 103 is provided on the semicircular cylinder, and the limiting hole 103 is located just above the reinforcing rib 101.

[0028] The bottom of the seat body, the bottom of the semicircular cylinder, and the bottoms of the two wing ends are flush with each other.

[0029] The above-mentioned half-bracket base is prepared by hand lay-up method. The thickness of the semicircular cylinder, reinforcing ribs and base body are all equal, which is 8mm; the height of the half-bracket base is 110mm; the inner radius of the cylinder is 25mm, and the outer radius is 33mm; the width of the half-bracket base is 126mm. Excluding the 66mm diameter of the cylinder, the wing ends on both sides are 30mm wide, the width of the base body is also 126mm, and the length of the edge is 50mm. The diameter of the mounting bolt hole is 6mm, the diameter of the fixing screw hole is 8mm, and the diameter of the limit hole is 4mm. The bottom length of the reinforcing rib is 17mm and the height is 70mm. The center of the limit hole 103 is located 20mm above the top of the reinforcing rib 101.

[0030] The above-mentioned lightweight bracket base is prepared using PA66GF30 and PA66CF30 respectively. The two half bracket bases together constitute a lightweight bracket base, weighing 475g and 447g respectively, while the weight of the traditional cast steel bracket base is about 2.4kg, and the bracket base part has reduced weight by more than 80%. The mounting screws and fixing screws are also made of the same material as the traditional cast steel base, which will not bring additional weight increase. Compared with the traditional cast steel bracket base, the bracket base of the present invention only adds a limit pin. According to the selection of cast steel material, cylindrical through-type limit pin, the limit pin diameter is 4mm, and the length is 50mm. The weight of a single pin is about 5g, and with the fastening devices at both ends, the total weight is only about 7g. The double-pin staggered scheme is adopted, and the total weight of the double pins is within 15g. Compared with the weight reduction effect and order of magnitude, it does not bring additional load burden to the vehicle, and the installation and assembly are also convenient, and no additional process costs are incurred.

[0031] By adopting the lightweight bracket base of the present invention, the weight of both sides of the vehicle can be reduced by about 4kg. In addition, the PA66GF30 and PA66CF30 of the present invention also have excellent strength, which can ensure the safe and reliable connection between the non-load-bearing parts and the vehicle body and good long-term working stability.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. A lightweight bracket base, characterized in that: The lightweight support base is composed of two identical half support bases installed opposite to each other. The semi-bracket base includes a semicircular cylinder, two wing ends arranged on both circumferential edges of the semicircular cylinder and extending radially outward from the semicircular cylinder, a seat body vertically arranged on the bottom edge of the semicircular cylinder and the bottom edges of the two wing ends and extending toward a side away from the center line of the semicircular cylinder, and a reinforcing rib connecting the seat body and the outer surface of the semicircular cylinder; There are mounting screw holes on both wing ends, fixing screw holes on the base, and limiting holes on the semicircular cylinder; The half bracket base is made of a material with a density less than 1.4g / cm 3 And it is made of a material with a yield strength greater than 150MPa.

2. The lightweight support base according to claim 1, characterized in that: The bottom of the seat body, the bottom of the semicircular cylinder, and the bottoms of the two wing ends are flush with each other.

3. The lightweight support base according to claim 1, characterized in that: The material is one of PA66GF30 and PA66CF30.

4. The lightweight support base according to claim 1, characterized in that: The half-bracket base is prepared by hand lay-up method.

5. The lightweight support base according to claim 1, characterized in that: The reinforcing rib is arranged in the middle of the two wing ends.

6. The lightweight support base according to claim 5, characterized in that: Set the limiting hole just above the reinforcing rib.

7. The lightweight support base according to claim 6, characterized in that: There are two limiting holes, one of which is set on the center line of the arc surface of the cylinder clamped by the reinforcing rib and one of the wing ends, and the other limiting hole is set on the center line of the arc surface of the cylinder clamped by the reinforcing rib and the other wing end.

8. Use of the lightweight bracket base according to any one of claims 1 to 7 in automotive parts.

9. The use according to claim 8, characterized in that The automobile component is specifically a base at the junction of the automobile non-load-bearing component and the vehicle body.

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