Casting mold for integrated longitudinal beam at rear section of automobile

Abstract

The utility model provides an integrated longitudinal beam casting mold for the rear section of an automobile. The integrated longitudinal beam casting mold comprises a top plate, a bottom plate, an upper mold body and a lower mold body, a plurality of first bolt holes are formed in the top plate, a first lining is inserted in each first bolt hole, the outer wall of each first lining is in clearance fit with the inner wall of the corresponding first bolt hole, a first bolt vertically penetrates through each first lining, and first threaded holes vertically corresponding to the first bolts one to one are formed in the upper end of the upper die body; a plurality of second bolt holes are formed in the bottom plate, a second lining is inserted in each second bolt hole, the outer wall of each second lining is in clearance fit with the inner wall of the corresponding second bolt hole, a second bolt vertically penetrates through each second lining, and second threaded holes vertically corresponding to the second bolts one to one are formed in the lower end of the lower die body; according to the utility model, the situation that the first bolt and the top plate are blocked and cannot be screwed out can be avoided, and the situation that the second bolt and the bottom plate are blocked and cannot be screwed out can also be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts casting molds, in particular to an automobile rear section integrated longitudinal beam casting mold. Background Art

[0002] In order to ensure the structural strength and structural integrity of the integrated longitudinal beam of the rear section of the automobile, the rear section longitudinal beam of the automobile is now gradually cast in one piece using a casting mold; the integrated longitudinal beam casting mold of the rear section of the automobile currently on the market includes a top plate, a bottom plate, and an upper mold body and a lower mold body arranged opposite to each other in an upper and lower direction; a plurality of first bolt holes are provided on the top plate, and a first bolt is vertically penetrated through each first bolt hole, and the upper end of the upper mold body is provided with a first threaded hole corresponding to each first bolt one by one, and each first bolt is threadedly connected to the first threaded hole at the corresponding position to fix the top plate to the upper end of the upper mold body, a plurality of second bolt holes are provided on the bottom plate, and a second bolt is vertically penetrated through each second bolt hole, and the lower end of the lower mold body is provided with a second threaded hole corresponding to each second bolt one by one, and each second bolt is threadedly connected to the second threaded hole at the corresponding position to fix the bottom plate to the lower end of the lower mold body; however, in the existing integrated longitudinal beam casting mold structure of the rear section of the automobile, due to the first bolt on the The gap between the screw portion and the hole wall of the first threaded hole is small, and the gap between the screw portion on the second bolt and the hole wall of the second threaded hole is small. The upper mold body and the lower mold body will produce a large temperature rise due to the high temperature of the casting material during the process of casting the integrated longitudinal beam of the rear section of the automobile, that is, the upper mold body and the lower mold body will expand due to heat, and because the gap between the screw portion on the first bolt and the hole wall of the first threaded hole is small, and the gap between the screw portion on the second bolt and the hole wall of the second threaded hole is small, when the upper mold body is heated and expanded, it will drive the first bolt to move laterally, which will cause the first bolt to bend and deform. Similarly, when the lower mold body is heated and expanded, it will drive the second bolt to move laterally, which will cause the second bolt to bend and deform. After the first bolt and the second bolt are bent and deformed, the first bolt will be stuck with the top plate and the first bolt cannot be screwed out, and the second bolt will be stuck with the bottom plate and the second bolt cannot be screwed out. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an integrated longitudinal beam casting mold for the rear section of an automobile, which can avoid the situation where the first bolt is stuck and cannot be screwed out between the top plate, and can avoid the situation where the second bolt is stuck and cannot be screwed out between the bottom plate.

[0004] The utility model provides an integrated longitudinal beam casting mold for the rear section of an automobile, comprising a top plate, a bottom plate, and an upper mold body and a lower mold body arranged opposite to each other in an upper and lower direction; a plurality of first bolt holes are provided on the top plate, a first bushing is inserted in each first bolt hole, the outer wall of the first bushing is clearance-matched with the inner wall of the first bolt hole, a first annular convex edge is provided on the outer wall of the upper end of the first bushing, the first annular convex edge abuts against the top plate at the outer edge of the upper end of the first bolt hole, a first bolt is vertically passed through the first bushing, and a first threaded hole corresponding to the first bolt vertically one by one is provided on the upper end of the upper mold body, and each first bolt is inserted into the corresponding position. The first threaded hole is threadedly connected to fix the top plate to the upper end of the upper mold body; a plurality of second bolt holes are provided on the bottom plate, and a second bushing is inserted in each second bolt hole, and the outer wall of the second bushing is clearance-matched with the inner wall of the second bolt hole, and a second annular flange is provided on the outer wall of the lower end of the second bushing, and the second annular flange abuts against the bottom plate at the outer edge of the lower end of the second bolt hole, and a second bolt is vertically passed through the second bushing, and the lower end of the lower mold body is provided with a second threaded hole vertically corresponding to the second bolt, and each second bolt is threadedly connected to the second threaded hole at the corresponding position to fix the bottom plate to the lower end of the lower mold body.

[0005] After the utility model adopts the above-mentioned structure, since the outer wall of the first bushing and the inner wall of the first bolt hole are clearance-matched, when the upper mold body is heated and expands and drives the first bushing and the first bolt to move laterally, the first bushing and the first bolt have space to move laterally relative to the first bolt hole, thereby avoiding the first bolt from bending and deformation. Similarly, since the outer wall of the second bushing and the inner wall of the second bolt hole are clearance-matched, when the lower mold body is heated and expands and drives the second bushing and the second bolt to move laterally, the second bushing and the second bolt have space to move laterally relative to the second bolt hole, thereby avoiding the second bolt from bending and deformation. That is, by adopting the above-mentioned structure, it is possible to avoid the first bolt from getting stuck and unable to be unscrewed between the top plate, and it is possible to avoid the second bolt from getting stuck and unable to be unscrewed between the bottom plate.

[0006] In one possible embodiment, a first annular groove is provided at the outer edge of the upper end of each first threaded hole, and the lower end of each first bushing is inserted into the first annular groove at the corresponding position and abuts against the inner bottom of the first annular groove; by adopting this structure, after the first bushing is inserted into the first bolt hole, the lower end of the first bushing can be inserted into the first annular groove at the corresponding position and abut against the inner bottom of the first annular groove, that is, it can play a role in positioning and limiting the first bushing. In addition, when the upper mold body expands due to heat, the first bushing can further reliably move laterally with the upper mold body relative to the first bolt hole.

[0007] In one possible embodiment, a second annular groove is provided at the outer edge of the lower end of each second threaded hole, and the upper end of each second bushing is inserted into the second annular groove at the corresponding position and abuts against the inner top of the second annular groove; by adopting this structure, after the second bushing is inserted into the second bolt hole, the upper end of the second bushing can be inserted into the second annular groove at the corresponding position and abut against the inner top of the second annular groove, that is, it can play a role in positioning and limiting the second bushing. In addition, when the lower mold body expands due to heat, the second bushing can further reliably move laterally with the lower mold body relative to the second bolt hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a first three-dimensional structural diagram of the utility model;

[0009] Figure 2 This is a second three-dimensional structural diagram of the utility model;

[0010] Figure 3 This is a schematic cross-sectional view of the utility model;

[0011] Figure 4 for Figure 3 The schematic diagram of the structure after enlarging at A in the middle;

[0012] Figure 5 for Figure 3 Schematic diagram of the structure after enlarging point B in the middle. DETAILED DESCRIPTION

[0013] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0014] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0015] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0016] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] See also Figure 1-5 As shown, the embodiment of the present application discloses a casting mold for an integrated longitudinal beam of the rear section of an automobile, comprising a top plate 1, a bottom plate 2, and an upper mold body 3 and a lower mold body 4 arranged opposite to each other in an upper and lower direction; a plurality of first bolt holes 11 are provided on the top plate 1, and a first bushing 5 is inserted in each first bolt hole 11, and the outer wall of the first bushing 5 is gap-matched with the inner wall of the first bolt hole 11, and a first annular convex edge 51 is provided on the outer wall of the upper end of the first bushing 5, and the first annular convex edge 51 abuts against the top plate 1 at the outer edge of the upper end of the first bolt hole 11, and a first bolt 6 is vertically passed through the first bushing 5, and the upper end of the upper mold body 3 is provided with a first threaded hole 31 vertically corresponding to the first bolt 6, and each first bolt 6 is vertically connected to the corresponding position. The first threaded hole 31 is threadedly connected to fix the top plate 1 to the upper end of the upper mold body 3; a plurality of second bolt holes 21 are provided on the bottom plate 2, and a second bushing 7 is inserted in each second bolt hole 21, and the outer wall of the second bushing 7 is clearance-matched with the inner wall of the second bolt hole 21, and a second annular flange 71 is provided on the outer wall of the lower end of the second bushing 7, and the second annular flange 71 abuts against the bottom plate 2 at the outer edge of the lower end of the second bolt hole 21, and a second bolt 8 is vertically passed through the second bushing 7, and the lower end of the lower mold body 4 is provided with a second threaded hole 41 vertically corresponding to the second bolt 8, and each second bolt 8 is threadedly connected to the second threaded hole 41 at the corresponding position to fix the bottom plate 2 to the lower end of the lower mold body 4.

[0018] A first annular groove 32 is provided at the outer edge of the upper end of each first threaded hole 31, and the lower end of each first bushing 5 is inserted into the first annular groove 32 at the corresponding position and abuts against the inner bottom of the first annular groove 32; by adopting this structure, after the first bushing is inserted into the first bolt hole, the lower end of the first bushing can be inserted into the first annular groove at the corresponding position and abut against the inner bottom of the first annular groove, that is, it can play a role in positioning and limiting the first bushing. In addition, when the upper mold body expands due to heat, the first bushing can further reliably move laterally with the upper mold body relative to the first bolt hole.

[0019] A second annular groove 42 is provided at the outer edge of the lower end of each second threaded hole 41, and the upper end of each second bushing 7 is inserted into the second annular groove 42 at the corresponding position and abuts against the inner top of the second annular groove 42; by adopting this structure, after the second bushing is inserted into the second bolt hole, the upper end of the second bushing can be inserted into the second annular groove at the corresponding position and abut against the inner top of the second annular groove, that is, it can play a role in positioning and limiting the second bushing. In addition, when the lower mold body expands due to heat, the second bushing can further reliably move laterally with the lower mold body relative to the second bolt hole.

[0020] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A casting mold for an integrated longitudinal beam of a rear section of an automobile, comprising a top plate (1), a bottom plate (2), and an upper mold body (3) and a lower mold body (4) arranged in an upper and lower direction relative to each other; characterized in that: The top plate (1) is provided with a plurality of first bolt holes (11), each of which is inserted with a first bushing (5), the outer wall of the first bushing (5) is gap-matched with the inner wall of the first bolt hole (11), the outer wall of the upper end of the first bushing (5) is provided with a first annular flange (51), the first annular flange (51) abuts against the top plate (1) at the outer edge of the upper end of the first bolt hole (11), the first bolt (6) is vertically passed through the first bushing (5), the upper end of the upper mold body (3) is provided with a first threaded hole (31) vertically corresponding to the first bolt (6), each of the first bolts (6) is threadedly connected to the first threaded hole (31) at the corresponding position to fix the top plate (1) to the upper end of the upper mold body (3); The base plate (2) is provided with a plurality of second bolt holes (21), each of which is provided with a second bushing (7), the outer wall of the second bushing (7) is clearance-matched with the inner wall of the second bolt hole (21), the outer wall of the lower end of the second bushing (7) is provided with a second annular flange (71), the second annular flange (71) abuts against the base plate (2) at the outer edge of the lower end of the second bolt hole (21), the second bushing (7) is vertically penetrated with a second bolt (8), the lower end of the lower mold body (4) is provided with a second threaded hole (41) vertically corresponding to the second bolt (8), each second bolt (8) is threadedly connected to the second threaded hole (41) at the corresponding position to fix the base plate (2) to the lower end of the lower mold body (4).

2. The casting mold for the integrated rear longitudinal beam of an automobile according to claim 1, characterized in that: A first annular groove (32) is provided at the outer edge of the upper end of each first threaded hole (31), and the lower end of each first bushing (5) is inserted into the first annular groove (32) at the corresponding position and abuts against the inner bottom of the first annular groove (32).

3. The casting mold for the integrated rear longitudinal beam of an automobile according to claim 1, characterized in that: A second annular groove (42) is provided at the outer edge of the lower end of each second threaded hole (41), and the upper end of each second bushing (7) is inserted into the second annular groove (42) at the corresponding position and abuts against the inner top of the second annular groove (42).

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