A casting model structure for a differential housing with a large flange surface thickness

Abstract

The present invention is a casting model structure for a differential housing with a large and thick flange disc, comprising a riser column, and an A casting, a B casting and a C casting are arranged around the riser column, wherein the A casting and the C casting are symmetrically distributed on both sides of the riser column, respectively, and the B casting is located on the perpendicular bisector of the center line of the A casting, the riser column and the C casting, and a connecting block is arranged between the riser column and the flanges of the A casting, the B casting and the C casting, and a first insulation block is arranged between the A casting and the B casting and between the C casting and the B casting on the outer wall of the riser column, and a plurality of second insulation blocks are arranged between the A casting and the C casting on the outer wall of the riser, and the length of the second insulation block is greater than that of the first insulation block, and an upper sleeve insulation column is arranged in the upper sleeve of the A casting, the B casting and the C casting, and a lower sleeve insulation column is arranged in the lower sleeve of the A casting, the B casting and the C casting. The present invention is a structure in which the upper sleeve, the lower sleeve and the flange disc are relatively thick and the side sleeve area is relatively weak.

Description

Technical Field

[0001] The invention relates to the technical field of automobile differential housing casting, in particular to a casting model structure for a differential housing with a thick and large flange surface. Background Art

[0002] In the current automotive industry environment, the design of automotive parts is very important, especially automotive safety parts, which not only need to meet various indicators such as installation, size, performance and frequency; at the same time, with the introduction of new national policies such as energy conservation, environmental protection, and green travel, the design of various automotive parts also needs to strengthen the control of various indicators, such as product weight, size, and dynamic balance stability. In this way, the design of many new products will break the traditional design, and such products need to be developed and produced with more advanced and more economical process solutions, and also meet their various indicators. For example, in the differential housing products in the transmission system of the gearbox, similar products in the past generally have a relatively thick flange surface and side sleeve area, which makes the weight of the whole vehicle relatively heavy, which is not conducive to energy conservation and emission reduction. Summary of the invention

[0003] The present invention aims to solve the deficiencies of the prior art and provide a casting model structure for a differential housing with a large flange surface thickness.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A casting model structure for a differential housing with a large flange surface thickness, comprising a central riser column, wherein an A casting, a B casting and a C casting are arranged around the riser column, wherein the A casting, the B casting and the C casting all comprise a central flange, an upper shaft sleeve located at the top of the flange, and a lower shaft sleeve located at the bottom of the flange, wherein the A casting and the C casting are symmetrically distributed on both sides of the riser column, the B casting is located on the perpendicular bisector of the center line of the A casting, the riser column and the C casting, and the A casting, the B casting and the C casting are located on a circle with the riser column as the center. On the same circumference of the riser column, connecting blocks are provided between the flanges of the A casting, the B casting and the C casting, a first insulation block is provided on the outer wall of the riser column between the A casting and the B casting and between the C casting and the B casting, a plurality of second insulation blocks are provided on the outer wall of the riser between the A casting and the C casting, the length of the second insulation block is greater than the length of the first insulation block, an upper sleeve insulation column is provided in the upper sleeve of the A casting, the B casting and the C casting, and a lower sleeve insulation column is provided in the lower sleeve of the A casting, the B casting and the C casting.

[0006] The cross section of the first insulation block is an isosceles triangle structure, wherein the sharp corners of the triangle structure are located in the middle of the A casting and the B casting, and in the middle of the C casting and the B casting.

[0007] The three sides of the isosceles triangle structure of the first heat-insulating block are connected at a chamfered structure.

[0008] The cross section of the second heat-insulating block is a parallelogram structure.

[0009] The number of the second thermal insulation blocks is two, and the two second thermal insulation blocks are evenly distributed between the A casting and the C casting.

[0010] The upper shaft sleeve heat preservation column and the lower shaft sleeve heat preservation column are both cylindrical structures.

[0011] The riser column comprises a first tapered column at the upper end which is narrow at the top and wide at the bottom, and a second tapered column at the lower end which is wide at the top and narrow at the bottom.

[0012] The height of the first tapered column is greater than the height of the second tapered column.

[0013] The beneficial effects of the present invention are as follows: the present invention has a simple structural design, is easy to manufacture, occupies a small template space, the riser column is not only a shrinkage compensation body, but also serves as a drainage structure, the insulation of the first insulation block, the second insulation block, the upper sleeve insulation column, and the lower sleeve insulation column can combine the existing relatively scattered hot spots into one hot spot, so that the riser column can be smoothly compensated for shrinkage and reduce product shrinkage defects. The present invention is a new differential housing structure, with a relatively thick upper sleeve, a lower sleeve and a flange surface, and a relatively weak side sleeve area. Products with this structure are of great significance for reducing the weight of the entire vehicle, reducing emissions, reducing shock requirements, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of one aspect of the present invention;

[0015] Figure 2 It is a structural schematic diagram of another aspect of the present invention;

[0016] Figure 3 It is a front view of the present invention;

[0017] Figure 4 A top view of the present invention;

[0018] Figure 5 for Figure 4 AA section view in;

[0019] In the figure: 1-riser column; 2-A casting; 3-B casting; 4-C casting; 5-flange; 6-connecting block; 7-first insulation block; 8-second insulation block; 9-upper sleeve; 10-upper sleeve insulation column; 11-lower sleeve; 12-lower sleeve insulation column; 13-first tapered column; 14-second tapered column;

[0020] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] like Figures 1 to 5 As shown, a casting model structure for a differential housing with a large flange surface thickness includes a central riser column 1, and an A casting 2, a B casting 3 and a C casting 4 are arranged around the riser column 1. The A casting 2, the B casting 3 and the C casting 4 all include a central flange 5, an upper sleeve 9 located on the top of the flange 5, and a lower sleeve 11 located at the bottom of the flange 5. The A casting 2 and the C casting 4 are symmetrically distributed on both sides of the riser column 1, respectively, and the B casting 3 is located on the perpendicular bisector of the center line of the A casting 2, the riser column 1 and the C casting 4. The A casting 2, the B casting 3 and the C casting 4 are located at a center of the riser column 1. On the same circumference, connecting blocks 6 are provided between the riser column 1 and the flange plates 5 of the A casting 2, the B casting 3, and the C casting 4. A first insulation block 7 is provided on the outer wall of the riser column 1 between the A casting 2 and the B casting 3 and between the C casting 4 and the B casting 3. A plurality of second insulation blocks 8 are provided on the outer wall of the riser 1 between the A casting 2 and the C casting 4. The length of the second insulation block 8 is greater than that of the first insulation block 7. An upper sleeve insulation column 10 is provided in the upper sleeve 9 of the A casting 2, the B casting 3, and the C casting 4. A lower sleeve insulation column 12 is provided in the lower sleeve 11 of the A casting 2, the B casting 3, and the C casting 4.

[0023] The cross section of the first insulation block 7 is an isosceles triangle structure, wherein the sharp corners of the triangle structure are located in the middle of the A casting 2 and the B casting 3 , and in the middle of the C casting 4 and the B casting 3 .

[0024] The three sides of the isosceles triangle structure of the first heat-insulating block 7 are connected at a chamfered structure.

[0025] The cross section of the second heat-insulating block 8 is a parallelogram structure.

[0026] There are two second thermal insulation blocks 8 , and the two second thermal insulation blocks 8 are evenly distributed between the A casting 2 and the C casting 4 .

[0027] The upper shaft sleeve insulation column 10 and the lower shaft sleeve insulation column 12 are both cylindrical structures.

[0028] The riser column 1 comprises a first tapered column 13 at the upper end which is narrow at the top and wide at the bottom, and a second tapered column 14 at the lower end which is wide at the top and narrow at the bottom.

[0029] The height of the first tapered column 13 is greater than the height of the second tapered column 14 .

[0030] When pouring the present invention, a pair of templates installed with this structure print out sand molds respectively during the molding process, and each sand mold molds a corresponding mold cavity. Then the two sand molds are combined and molten iron is poured. The molten iron reaches the pouring channel of one of the second insulation blocks 8 on the lower template through the pouring channel of the pouring system, enters the pouring channel of the riser column 1 through the pouring channel of the second insulation block 8, and fills the pouring cavities of the A casting 2, the B casting 3, and the C casting 4 through the three output pouring channels of the riser column 1 to form a casting. At the same time, the pouring channels of another second insulation block 8 and the two first insulation blocks 7 connected to the pouring channel of the riser column 1 will be filled, and finally the pouring channel of the upper sleeve insulation column 10 placed at the upper sleeve 9 and the pouring channel of the lower sleeve insulation column 12 placed at the lower sleeve 11 will also be filled.

[0031] The arrangement of casting A 2, casting B 3, and casting C 4 allows the flanges 5 near casting A 2 and casting B 3, and casting B 3 and casting C 4 to form a common temperature, but the common temperature heat is still small. A first insulation block 7 is added between the two to form a larger common temperature area to increase the heat of the flange 5. In the layout, casting A 2 and casting C 4 do not form a common temperature area. Therefore, a second insulation block 8 is provided between casting A 2 and casting C 4 to form a common temperature area with casting A 2 and casting C 4 to increase the heat of the flange 5. The formation of the common temperature area is conducive to the riser column 1 to compensate the thick and large flange 5 structure of casting A 2, casting B 3, and casting C 4.

[0032] Since the side sleeve area structure is relatively weak, and the flange 5 surface structure is relatively thick and large, the lower sleeve 11 and the flange 5 surface area are relatively weak, resulting in three large thermal nodes in the casting, the thick flange structure, the upper sleeve 9 and the lower sleeve 11. The thick and large structure of the flange 5 can be compensated for shrinkage with the riser column 2 using the above scheme; the upper sleeve 9 and the lower sleeve 11 need to add an upper sleeve insulation column 10 and a lower sleeve insulation column 12 respectively, so that the hottest areas at the thermal nodes are the upper sleeve insulation column 10 and the lower sleeve insulation column 12, that is, the molten iron in this area solidifies the latest. During the solidification process of the casting, in addition to the carbide in the molten iron in this area self-compensating for shrinkage, the upper sleeve insulation column 10 and the lower sleeve insulation column 12 will also supply molten iron to the upper sleeve 9 and the lower sleeve 11. Even if the upper sleeve insulation column 10 and the lower sleeve insulation column 12 shrink, they will be concentrated in the central area of ​​the cylinder and will be processed to ensure a good casting product.

[0033] The present invention has a simple structural design, is easy to process and manufacture, and occupies a small template space. The second insulation block 8 is both an insulation structure and a drainage structure. The riser column 1 is both a shrinkage compensation body and a drainage structure. The upper sleeve insulation column 10 and the lower sleeve insulation column 12 are added to concentrate the heat nodes of the upper sleeve 9 and the lower sleeve 11, and concentrate their shrinkage in the upper sleeve insulation column 10 and the lower sleeve insulation column 12. The layout of the three castings has a co-temperature effect, so that the riser can smoothly compensate for the shrinkage of the flange surface and reduce product shrinkage defects.

[0034] The present invention is a new structure of a differential housing, which has a relatively thick upper sleeve, a lower sleeve and a flange surface, and a relatively weak side sleeve area. Products with this structure are of great significance for reducing the weight of the entire vehicle, reducing emissions, reducing shock requirements and reducing costs.

[0035] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A casting mold structure for a differential housing with a large flange surface thickness, characterized in that: The invention comprises a central riser column (1), wherein an A casting (2), a B casting (3) and a C casting (4) are arranged around the riser column (1), wherein the A casting (2), the B casting (3) and the C casting (4) all comprise a central flange (5), an upper shaft sleeve (9) located at the top of the flange (5), and a lower shaft sleeve (11) located at the bottom of the flange (5), wherein the A casting (2) and the C casting (4) are symmetrically distributed on both sides of the riser column (1), respectively, the B casting (3) is located on the perpendicular bisector of the center line of the A casting (2), the riser column (1) and the C casting (4), the A casting (2), the B casting (3) and the C casting (4) are located on the same circumference with the riser column (1) as the center, and the riser column (1) and the A casting ( A connecting block (6) is provided between the flange plates (5) of the A casting (2), the B casting (3) and the C casting (4); a first insulation block (7) is provided on the outer wall of the riser column (1) between the A casting (2) and the B casting (3) and between the C casting (4) and the B casting (3); a plurality of second insulation blocks (8) are provided on the outer wall of the riser column (1) between the A casting (2) and the C casting (4); the length of the second insulation block (8) is greater than the length of the first insulation block (7); an upper sleeve insulation column (10) is provided in the upper sleeve (9) of the A casting (2), the B casting (3) and the C casting (4); and a lower sleeve insulation column (12) is provided in the lower sleeve (11) of the A casting (2), the B casting (3) and the C casting (4).

2. A casting mold structure for a differential case with a large flange thickness according to claim 1, characterized in that: The cross section of the first heat-insulating block (7) is an isosceles triangle structure, wherein the sharp corners of the triangle structure are located in the middle of the A casting (2) and the B casting (3), and in the middle of the C casting (4) and the B casting (3).

3. The casting mold structure for a differential case with a large flange thickness according to claim 2, characterized in that: The three sides of the isosceles triangle structure of the first heat-insulating block (7) are connected at a chamfered structure.

4. The casting mold structure for a differential case with a large flange thickness according to claim 3, characterized in that: The cross section of the second heat-insulating block (8) is a parallelogram structure.

5. The casting mold structure for a differential case with a large flange thickness according to claim 4, characterized in that: The number of the second heat-insulating blocks (8) is two, and the two second heat-insulating blocks (8) are evenly distributed between the A casting (2) and the C casting (4).

6. The casting mold structure for a differential case with a large flange thickness according to claim 5, characterized in that: The upper shaft sleeve heat-insulating column (10) and the lower shaft sleeve heat-insulating column (12) are both cylindrical structures.

7. The casting mold structure for a differential case with a large flange thickness according to claim 6, characterized in that: The riser column (1) comprises a first tapered column (13) at the upper end which is narrow at the top and wide at the bottom, and a second tapered column (14) at the lower end which is wide at the top and narrow at the bottom.

8. The casting mold structure for a differential case with a large flange thickness according to claim 7, characterized in that: The height of the first tapered column (13) is greater than the height of the second tapered column (14).

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