Instrument panel beam
By designing symmetrical circular and transverse elliptical reference holes and reference seats on the instrument panel crossbeam, the problems of dimensional deviation and reference hole spacing deviation in die casting manufacturing are solved, achieving less mold correction and higher machining accuracy.
Patent Information
- Application Number
- CN202520382352.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-06
AI Technical Summary
When die-casting instrument panel crossbeams, the large amount of material solidification shrinkage leads to significant dimensional deviations in the molded products. Furthermore, the setting of multiple reference holes results in large deviations in the center spacing, requiring frequent adjustments to the die-casting mold.
The instrument panel crossbeam is designed so that the left and right front side beams protrude forward from both ends of the instrument panel. Circular and transverse elliptical reference holes are symmetrically separated in the vehicle width direction, and reference seats are set on the lower and upper surfaces respectively. These features are formed using die-casting molds to reduce dimensional deviations.
By symmetrically setting the reference holes and reference seats, the dimensional deviation of the molded products in the width direction is reduced, the amount of correction required for the die-casting mold is reduced, and the machining accuracy is improved.
Smart Images
Figure CN223702746U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a dashboard crossbeam. Background Technology
[0002] In the past, when manufacturing large components such as dashboard crossbeams by die casting, the dimensions of the molded products (dashboard crossbeams after demolding) could vary significantly due to the large solidification shrinkage of the material, and the temperature conditions of the die casting mold and other components. When such dimensional deviations far exceeded the nominal values, the die casting mold needed to be corrected to account for these deviations, resulting in increased correction amounts.
[0003] Furthermore, sometimes, considering the deviations during the processing of the molded product, multiple reference holes are provided when designing the die-casting mold. However, in the case of large parts, the spacing between the center parts of each reference hole can easily deviate significantly depending on the location of the multiple reference holes. Utility Model Content
[0004] In view of the above situation, the purpose of this utility model is to provide an instrument panel crossbeam that can reduce the dimensional deviation of molded products.
[0005] As a technical solution to the above-mentioned technical problems, this utility model provides an instrument panel crossbeam. The instrument panel crossbeam is formed by die casting, which integrates the instrument panel, the left and right front side beams (i.e., the left front side beam and the right front side beam), and the left and right front inner panels (i.e., the left front inner panel and the right front inner panel). The instrument panel extends along the vehicle in the vehicle width direction; the left and right front side beams are configured to protrude from the left and right ends of the instrument panel toward the front of the vehicle, respectively; the left and right front inner panels are respectively disposed on the upper part of the left and right front side beams, and reference holes are respectively provided on the lower surface of the instrument panel near the left and right front side beams. One of the reference holes (i.e., the reference hole near the left front side beam and the reference hole near the right front side beam) is configured as a circle, and the other is configured as a transverse ellipse with the length direction parallel to the vehicle width direction.
[0006] The two reference holes are formed using a die-casting mold, thus requiring the die-casting mold to be designed to achieve the above structure.
[0007] Therefore, by designing the circular reference hole and the transversely elliptical reference hole to be symmetrically separated from each other on the lower surface of the instrument panel near the left and right front side beams, respectively, the dimensional deviation of the molded product in the width direction of the instrument panel can be reduced. Here, the molded product refers to the instrument panel crossbeam after demolding.
[0008] In this way, the dimensional deviation of the molded product is less likely to deviate from the nominal value, thereby minimizing the amount of correction when the die-casting mold is modified.
[0009] In addition, in the aforementioned instrument panel crossbeam, it is preferable that reference seats serving as positioning references in the vertical direction are respectively provided at the center of the lower surface of the instrument panel in the vehicle width direction and at the front end of the lower surface of the left and right front side beams.
[0010] The three reference seats (i.e., the reference seat located at the center of the lower surface of the instrument panel in the vehicle width direction, the reference seat located at the front end of the lower surface of the left front side beam, and the reference seat located at the front end of the lower surface of the right front side beam) are made using a die-casting mold.
[0011] In addition, in the aforementioned instrument panel crossbeam, preferably, reference holes identical to the left and right reference holes are respectively provided at positions symmetrically above and below the left and right reference holes on the upper surface of the instrument panel; and reference seats identical to the three reference seats are respectively provided at positions symmetrically above and below the three reference seats on the upper surface of the instrument panel and the upper surfaces of the left and right front side beams. Attached Figure Description
[0012] Figure 1 is a bottom view showing one embodiment of the instrument panel crossbeam involved in this utility model.
[0013] Figure 2 is a left-side view of the dashboard crossbeam in Figure 1.
[0014] Figure 3(a) is a perspective view of a circular reference hole.
[0015] Figure 3(b) is a perspective view of a horizontally elliptical reference hole.
[0016] Figure 4 is a top view showing another embodiment of the instrument panel crossbeam involved in this utility model.
[0017] Figure 5 is a bottom view showing another embodiment of the instrument panel crossbeam involved in this utility model. Detailed Implementation
[0018] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 is a bottom view showing one embodiment of the dashboard crossbeam according to the present invention, and Figure 2 is a side view of the dashboard crossbeam in Figure 1. In each figure, Fr indicates the front side of the vehicle, Lh indicates the left side of the vehicle, Rh indicates the right side of the vehicle, and Up indicates the upper side of the vehicle.
[0019] The instrument panel beam 1 in this embodiment is an instrument panel beam that is integrally formed by die casting, which includes the instrument panel 2, the left and right front side beams (3L, 3R), and the front inner panel (4L, 4R).
[0020] The instrument panel 2 is configured to extend along the vehicle in the vehicle width direction, and side beam connecting parts (5L, 5R) protruding toward the rear of the vehicle are provided at its left and right ends respectively.
[0021] The side beam connectors (5L, 5R) are used to connect the side beam panels (also known as side sills) not shown.
[0022] The left and right front side beams (3L, 3R) protrude (extend) from the left and right ends of the instrument panel 2 toward the front of the vehicle, respectively, and are configured to be symmetrical on the instrument panel beam 1.
[0023] The left and right front inner panels (4L, 4R) are respectively located on the upper part of the left and right front side beams (3L, 3R).
[0024] Furthermore, a first reference hole 11, a second reference hole 12, a first reference seat 21, a second reference seat 22, and a third reference seat 23 are provided on the lower surface of the instrument panel crossbeam 1.
[0025] The first reference hole 11 and the second reference hole 12 are configured to be symmetrically arranged on the lower surface of the instrument panel 2, near the left and right front side beams (3L, 3R), respectively. In other words, the center portions of the first reference hole 11 and the second reference hole 12 are configured to be separated from each other on a straight line (refer to the dashed line) 100 parallel to the vehicle width direction of the instrument panel 2. This straight line 100 is perpendicular to the center line (refer to the dashed line) 200 of the instrument panel crossbeam 1, which is parallel to the vehicle length direction.
[0026] Specifically, the first reference hole 11 is located on the lower surface of the instrument panel 2 near the right front side beam 3R. As shown in Figure 3(a), the first reference hole 11 is a hole with a circular bottom. Meanwhile, the second reference hole 12 is located on the lower surface of the instrument panel 2 near the left front side beam 3L. As shown in Figure 3(b), the second reference hole 12 is a hole with an elliptical bottom, the length of which is parallel to the vehicle width direction. This ellipse is also referred to here as a "lateral ellipse".
[0027] The first reference seat 21 is located at the center of the lower surface of the instrument panel 2 in the vehicle width direction.
[0028] The second reference seat 22 and the third reference seat 23 are configured to be symmetrically arranged on the front end side of the lower surface of the left and right front side beams (3L, 3R). In other words, the center portions of the second reference seat 22 and the third reference seat 23 are configured to be separated from each other on a straight line (refer to the dashed line) 300 parallel to the vehicle width direction of the instrument panel crossbeam 1. This straight line 300 is perpendicular to the center line 200 of the instrument panel crossbeam 1 parallel to the vehicle length direction.
[0029] Specifically, the second reference seat 22 is disposed on the front end side of the lower surface of the right front side beam 3R, and close to the inner side in the vehicle width direction. At the same time, the third reference seat 23 is disposed on the front end side of the lower surface of the left front side beam 3L, and close to the inner side in the vehicle width direction.
[0030] Here, the first reference base 21, the second reference base 22, and the third reference base 23 are downwardly protruding convex portions. The cross-section of the first reference base 21, which is radially parallel, is semi-circular at the rear and rectangular at the front, and is configured such that its length direction is parallel to the vehicle length direction. The cross-sections of the second reference base 22 and the third reference base 23, which are radially parallel, are each circular. Furthermore, the lower end surfaces of the first reference base 21, the second reference base 22, and the third reference base 23 are all flat surfaces.
[0031] In addition, as described above, the first reference hole 11, the second reference hole 12, the first reference seat 21, the second reference seat 22, and the third reference seat 23 are all made using a die-casting mold (not shown). Therefore, the die-casting mold needs to be designed to achieve the above structure.
[0032] When the instrument panel crossbeam 1 is manufactured by die casting as described above, the following advantages are available.
[0033] Typically, when manufacturing large components such as dashboard crossbeams by die casting, the dimensions of the molded products can vary due to the large solidification shrinkage and temperature conditions of the die casting mold (resulting in dimensional deviations).
[0034] However, in this embodiment, since the die-casting mold is designed such that the circular first reference hole 11 and the transversely elliptical second reference hole 12 are separately arranged on the straight line 100 parallel to the vehicle width direction of the instrument panel 2, it is possible to reduce the dimensional deviation of the molded product, especially the part corresponding to the instrument panel 2, in the vehicle width direction. Thus, since the dimensional deviation of the molded product is less likely to deviate from the nominal value, the amount of correction required for the die-casting mold can be minimized.
[0035] Furthermore, when processing to correct the dimensional deviation, the first reference base 21, the second reference base 22, and the third reference base 23 can serve as references for positioning the molded product in the vertical direction, thereby improving processing accuracy.
[0036] Furthermore, this invention is not limited to the above-described embodiments and can be implemented in a variety of applications and variations.
[0037] (1) In the instrument panel beam 1 of the above embodiment, the structure of eliminating the first reference seat 21, the second reference seat 22 and the third reference seat 23 can be adopted.
[0038] (2) Figure 4 is a top view showing another embodiment of the instrument panel crossbeam involved in this utility model. On the upper surface of the instrument panel crossbeam 1 in this embodiment, there are a third reference hole 13 and a fourth reference hole 14 corresponding to the first reference hole 11 and the second reference hole 12 shown in Figure 1, respectively; and a fourth reference seat 24, a fifth reference seat 25 and a sixth reference seat 26 corresponding to the first reference seat 21, the second reference seat 22 and the third reference seat 23 shown in Figure 1, respectively.
[0039] The third reference hole 13 and the fourth reference hole 14 are configured to be symmetrically arranged on the upper surface of the instrument panel 2, near the left and right front side beams (3L, 3R), respectively. In other words, the center portions of the third reference hole 13 and the fourth reference hole 14 are configured to be separated from each other on a straight line (refer to the dashed line) 100 parallel to the vehicle width direction of the instrument panel 2. This straight line 100 is perpendicular to the center line (refer to the dashed line) 200 of the instrument panel crossbeam 1, which is parallel to the vehicle length direction.
[0040] Specifically, the third reference hole 13 is located on the upper surface of the right front inner panel 4R, on the instrument panel 2 side, and is positioned close to the inner side in the vehicle width direction. As shown in Figure 3(a), this third reference hole 13 is a hole with a circular bottom. Meanwhile, the fourth reference hole 14 is located on the upper surface of the left front inner panel 4L, on the instrument panel 2 side, and is positioned close to the inner side in the vehicle width direction. As shown in Figure 3(b), this fourth reference hole 14 is a hole with an elliptical bottom, and its length direction is parallel to the vehicle width direction. Here, such an ellipse is referred to as a "lateral ellipse".
[0041] The fourth reference seat 24 is located at the center of the upper surface of the instrument panel 2 in the vehicle width direction.
[0042] The fifth reference seat 25 and the sixth reference seat 26 are configured to be symmetrically arranged on the front end side of the upper surface of the left and right front side beams (3L, 3R) and close to the inner side in the vehicle width direction. In other words, the center portions of the fifth reference seat 25 and the sixth reference seat 26 are configured to be separated from each other on a straight line (refer to the dashed line) 300 of the instrument panel crossbeam 1 parallel to the vehicle width direction. This straight line 300 is perpendicular to the center line 200 of the instrument panel crossbeam 1 parallel to the vehicle length direction.
[0043] Specifically, the fifth reference seat 25 is disposed on the front end side of the upper surface of the right front side beam 3R, and close to the inner side in the vehicle width direction. At the same time, the sixth reference seat 26 is disposed on the front end side of the upper surface of the right front side beam 3R, and close to the inner side in the vehicle width direction.
[0044] Furthermore, the fourth reference base 24, the fifth reference base 25, and the sixth reference base 26 are upwardly projecting convex portions. The radially parallel cross-section of the fourth reference base 24 is semi-circular at the rear and rectangular at the front, and is configured such that its length direction is parallel to the vehicle length direction. The radially parallel cross-sections of the fifth reference base 25 and the sixth reference base 26 are each circular. Additionally, the upper surface of each of the fourth reference base 24, the fifth reference base 25, and the sixth reference base 26 is a flat surface.
[0045] In this embodiment, the die-casting mold needs to be designed such that a first reference hole 11, a second reference hole 12, a first reference seat 21, a second reference seat 22, and a third reference seat 23 are provided on the lower surface of the instrument panel crossbeam 1. In addition, a third reference hole 13 and a fourth reference hole 14 corresponding to the first reference hole 11 and the second reference hole 12 are also provided on the upper surface of the instrument panel crossbeam 1; and a fourth reference seat 24, a fifth reference seat 25, and a sixth reference seat 26 corresponding to the first reference seat 21, the second reference seat 22, and the third reference seat 23 are also provided.
[0046] Based on this structure, the dimensional deviation between the upper and lower surfaces of the molded product can be reduced. At the same time, it can also avoid or reduce the occurrence of positional deviation when the molded product is flipped up and down during processing to correct the dimensional deviation.
[0047] (3) Figure 5 is a bottom view showing another embodiment of the instrument panel crossbeam involved in this utility model. In this embodiment of the instrument panel crossbeam 1, the front ends of the left and right front side beams (3L, 3R) are connected by the crossbeam 6.
[0048] In addition, a first reference hole 11 is provided at the center of the lower surface of the instrument panel 2 in the vehicle width direction; and a second reference hole 12 is provided at the center of the lower surface of the crossbeam 6 in the vehicle width direction.
[0049] As shown in Figure 3(a), the first reference hole 11 is a hole with a circular bottom. Furthermore, as shown in Figure 3(b), the second reference hole 12 is a hole with an elliptical bottom, the length of which is parallel to the vehicle's length direction. Here, such an ellipse is referred to as a "longitudinal ellipse".
[0050] In this embodiment, the die-casting mold needs to be designed such that the circular first reference hole 11 is located at the center of the lower surface of the instrument panel 2 in the vehicle width direction.
[0051] Based on this structure, during the die casting process, since the solidification shrinkage from the center of the width direction of the instrument panel 2 to the left is equal to the solidification shrinkage to the right, the die casting mold can be corrected equally on both sides, making the correction easier.
[0052] In other words, if the die-casting mold is designed such that the first circular reference hole 11 is offset to the left or right of the center of the lower surface of the instrument panel 2 in the vehicle width direction, a difference will occur between the solidification shrinkage to the left and the solidification shrinkage to the right from the center of the instrument panel 2 in the vehicle width direction during the die-casting process. Therefore, when correcting the die-casting mold, it is necessary to make adjustments left and right, which makes the correction more complicated.
[0053] In addition, since the second reference hole 12 of the longitudinal ellipse is positioned at the center of the lower surface of the crossbeam 6 in the machine width direction, it is easier to set up the tools when performing die-casting mold correction.
[0054] (4) In the above embodiments, the first reference hole 11, the second reference hole 12, the third reference hole 13, and the fourth reference hole 14 can be through holes.
Claims
1. A dashboard crossbeam, manufactured by die casting, which integrates the dashboard, left and right front side beams, and left and right front inner panels into one piece, characterized in that: The dashboard extends along the width of the vehicle; The left and right front side beams are configured to protrude from the left and right ends of the instrument panel toward the front of the vehicle, respectively. The left and right front inner panels are respectively set on the upper part of the left and right front side beams; A reference hole is provided on the lower surface of the instrument panel, near the left and right front side beams respectively; Of the reference holes on the left and right, one is configured as a circle and the other is configured as a transverse ellipse with its length direction parallel to the vehicle width direction.
2. The instrument panel crossbeam as described in claim 1, characterized in that: Reference seats are provided at the center of the lower surface of the instrument panel in the vehicle width direction and at the front end of the lower surface of the left and right front side beams, respectively, to serve as positioning references in the vertical direction.
3. The instrument panel crossbeam as described in claim 2, characterized in that: On the upper surface of the instrument panel, at positions symmetrical to the left and right reference holes respectively, there are reference holes identical to the left and right reference holes; On the upper surface of the instrument panel and on the upper surface of the left and right front side beams, at positions symmetrical to the three reference seats, the same reference seats are respectively provided.