Axle housing core box structure
The integrated axle housing core box structure solves the problems of low production efficiency and poor casting quality of heavy vehicle axle housing sand cores, and realizes efficient and high-quality casting production.
Patent Information
- Application Number
- CN202422862330.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-23
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-11-23
AI Technical Summary
The existing production efficiency of heavy vehicle axle housing sand cores is low and the dimensional deviation is large. Gaps are easily present at the assembly, resulting in poor casting quality.
The integral bridge shell core box structure is adopted, including a lower core box and an upper core box, with multiple cavities and sand inlets. The integral bridge shell sand core is formed by mold closing, and the core skeleton is used to enhance positioning accuracy, improve production efficiency and casting quality.
This technology enables efficient molding of bridge shell sand cores, improves casting quality and production efficiency, reduces gaps at sand core assembly points, and enhances the structural strength of castings.
Smart Images
Figure CN223733779U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts casting technology, specifically to a bridge housing core box structure. Background Technology
[0002] Heavy vehicle axle housing sand cores are formed using core boxes. Existing manual axle housing core boxes include an upper core box and a lower core box. In the manual production process, the sand cores are formed separately in the upper and lower core boxes, and then the upper and lower sand cores are combined to form a single axle housing sand core. This method of making cores separately and then assembling them is not only inefficient, but also prone to deviations in the dimensions of the sand cores after assembly, resulting in deviations in the casting wall thickness. In addition, gaps are prone to exist at the assembly points of the sand cores, causing molten iron to enter the gaps and form fissures in the inner cavity of the casting, which are difficult to clean and polish. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a bridge shell core box structure that can produce integral bridge shell sand cores with high production efficiency.
[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:
[0005] The bridge housing core box structure includes a lower core box and an upper core box located above the lower core box;
[0006] The lower core box has a lower parting surface and is recessed downward from the lower parting surface to form a first lower cavity and two second lower cavities located on opposite sides of the first lower cavity. The two second lower cavities extend along the longitudinal direction of the bridge shell core box structure and communicate with the first lower cavity.
[0007] The upper core box has an upper parting surface corresponding to the lower parting surface. The upper core box is recessed upward from the upper parting surface to form a first upper cavity corresponding to the first lower cavity and two second upper cavities extending along the longitudinal direction and communicating with the first upper cavity. The first upper cavity penetrates upward through the top surface of the upper core box and forms a first sand inlet on the top surface of the upper core box. Each second upper cavity corresponds to a second lower cavity. Each second upper cavity penetrates upward through the top surface of the upper core box and forms a second sand inlet on the top surface of the upper core box.
[0008] Furthermore, the top surface of the upper core box forms a first reference surface corresponding to the first upper cavity, and the top surface of the upper core box forms a second reference surface corresponding to each of the second upper cavities, the second reference surface being lower than the first reference surface.
[0009] Furthermore, the top surface of the upper core box is recessed downward to form a groove corresponding to each of the second upper cavities. The groove surrounds the outer side of the second sand inlet and penetrates the two opposite outer side walls of the upper core box along the transverse direction of the bridge shell core box structure. The bottom surface of the groove forms the second reference surface.
[0010] Furthermore, the lower parting surface is recessed downward to form a fixing groove at the end of each second lower cavity away from the first lower cavity. The fixing groove extends toward the second lower cavity and the two are connected. Each fixing groove is embedded with a positioning block. Each positioning block is recessed outward to form a positioning groove on the first inner sidewall corresponding to the end face of the second lower cavity. The bridge shell core box structure also includes a core bone. The two ends of the core bone are respectively engaged with the two positioning grooves.
[0011] Furthermore, the top surface of the positioning block and the lower parting surface are on the same plane, and each of the first inner sidewalls protrudes to form a protrusion corresponding to the end of the core bone. The protrusion extends upward to the top surface of the positioning block, and a positioning groove is recessed near the sidewall of the second lower cavity. The positioning groove penetrates upward through the top surface of the positioning block, and the core bone is higher than the top surface of the positioning block.
[0012] Furthermore, the upper parting surface is recessed upward to form a limiting groove corresponding to each of the fixing grooves, and a positioning block is embedded in each limiting groove. The bottom surface of the positioning block in the limiting groove is on the same plane as the upper parting surface, and the upper and lower ends of each end of the core bone cooperate with the corresponding limiting groove and positioning groove, respectively.
[0013] Furthermore, the core is a metal tube or a metal rod.
[0014] The bridge shell core box structure of this utility model has a first sand inlet and a second sand inlet on the top surface of the upper core box. When the upper core box and the lower core box are closed, the first lower cavity, two second lower cavities, the first upper cavity and two second upper cavities form a mold cavity for forming the bridge shell sand core. When forming the bridge shell sand core, core sand is filled into the mold cavity through the first sand inlet and the second sand inlet, thereby forming an integral bridge shell sand core, which not only improves the quality of the casting, but also improves the production efficiency. Attached Figure Description
[0015] Figure 1 This is a three-dimensional schematic diagram of the bridge shell core box structure of this utility model after mold assembly;
[0016] Figure 2 for Figure 1 A partial exploded view;
[0017] Figure 3 for Figure 2 A magnified view of part A;
[0018] Figure 4 for Figure 1 A three-dimensional schematic diagram of the lower core box;
[0019] Figure 5 for Figure 1 A three-dimensional schematic diagram of the upper core box from another perspective;
[0020] Figure 6 for Figure 1 The demolding state diagram. Detailed Implementation
[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:
[0022] like Figures 1 to 5 As shown, this utility model embodiment provides an axle housing core box structure for molding axle housing sand core 100 for heavy vehicle axles. In this embodiment, the axle housing core box structure is applied to a handmade axle housing core box. The axle housing core box structure includes a lower core box 1, an upper core box 2 located above the lower core box 1, and a core rib 4.
[0023] like Figure 1 , Figure 2 As shown, the lower core box 1 has a lower parting surface 11, and a first lower cavity 12 is formed by recessing downward from the lower parting surface 11, and two second lower cavities 13 are respectively located on opposite sides of the first lower cavity 12. The two second lower cavities 13 extend along the longitudinal direction X of the bridge shell core box structure and communicate with the first lower cavity 12. Figure 2 , Figure 3 As shown, a fixing groove 14 is formed by recessing the lower parting surface 11 at the end of each second lower cavity 13 away from the first lower cavity 12. The fixing groove 14 extends toward the second lower cavity 13 and the two are connected. A positioning block 3 is embedded in each fixing groove 14. A positioning groove 31 is formed by recessing the first inner sidewall of each positioning block 3 corresponding to the end face of the second lower cavity 13. Specifically, the top surface of the positioning block 3 is on the same plane as the lower parting surface 11, and a protrusion 32 is formed by protruding the end 41 of each first inner sidewall corresponding to the core 4. The protrusion 32 extends upward to the top surface of the positioning block 3 and is recessed near the sidewall of the second lower cavity 13 to form a positioning groove 31. The positioning groove 31 penetrates the top surface of the positioning block 3 upward.
[0024] like Figure 1 , Figure 5As shown, the upper core box 2 has an upper parting surface 21 corresponding to the lower parting surface 11. The upper core box 2 is recessed upward from the upper parting surface 21 to form a first upper cavity 22 corresponding to the first lower cavity 12 and two second upper cavities 23 extending along the longitudinal direction X and communicating with the first upper cavity 22. The first upper cavity 22 penetrates upward through the top surface of the upper core box 2 and forms a first sand inlet 221 on the top surface of the upper core box 2. Each second upper cavity 23 corresponds to a second lower cavity 13. Each second upper cavity 23 penetrates upward through the top surface of the upper core box 2 and forms a second sand inlet 231 on the top surface of the upper core box 2. When the upper core box 2 and the lower core box 1 are closed, the first lower cavity 12, the two second lower cavities 13, the first upper cavity 22 and the two second upper cavities 23 form a mold cavity for forming the bridge shell sand core 100. When forming the bridge shell sand core 100, core sand is filled into the mold cavity through the first sand inlet 221 and the second sand inlet 231, thereby forming an integral bridge shell sand core 100, which not only improves the quality of the casting, but also improves production efficiency.
[0025] like Figure 1 , Figure 5 As shown, the top surface of the upper core box 2 forms a first reference surface 24 corresponding to the first upper cavity 22, and the top surface of the upper core box 2 forms a second reference surface 25 corresponding to each second upper cavity 23. The second reference surface 25 is lower than the first reference surface 24. After adding core sand to the mold cavity, the core sand is leveled with the first reference surface 24 and the second reference surface 25 as a reference. After the core is made, the mold is opened and the bridge shell sand core 100 is taken out (e.g. Figure 6 As shown in the figure, an integral sand core can be obtained. For ease of processing, in this embodiment, the top surface of the upper core box 2 is recessed downward to form a groove 26 corresponding to each second upper cavity 23. The groove 26 surrounds the outside of the second sand inlet 231 and penetrates the opposite two outer side walls of the upper core box 2 along the transverse direction Y of the bridge shell core box structure. The bottom surface of the groove 26 forms the second reference surface 25, wherein the transverse direction Y is perpendicular to the longitudinal direction X. The upper parting surface 21 is also recessed upward to form a limiting groove 27 corresponding to each fixing groove 14. Each limiting groove 27 is embedded with a positioning block 3. The bottom surface of the positioning block 3 located in the limiting groove 27 is on the same plane as the upper parting surface 21.
[0026] like Figure 3 , Figure 4 As shown, the two ends of the core rib 4 are respectively engaged with two positioning grooves 31 to complete the positioning, and the core rib 4 is higher than the top surface of the positioning block 3. Specifically, the upper and lower ends of each end 41 of the core rib 4 are respectively engaged with the corresponding limiting groove 27 and positioning groove 31 to further improve the positioning accuracy of the core rib 4 and prevent its deviation. Specifically, the core rib 4 extends along the longitudinal direction X, and it is a metal tube or a metal rod. In this embodiment, the core rib 4 is a steel tube. By setting the core rib 4, the structural strength of the bridge shell sand core 100 can be enhanced.
[0027] The bridge shell core box structure of this utility model has a first sand inlet and a second sand inlet on the top surface of the upper core box. When the upper core box and the lower core box are closed, the first lower cavity, two second lower cavities, the first upper cavity and two second upper cavities form a mold cavity for forming the bridge shell sand core. When forming the bridge shell sand core, core sand is filled into the mold cavity through the first sand inlet and the second sand inlet, thereby forming an integral bridge shell sand core, which not only improves the quality of the casting, but also improves the production efficiency.
[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A core box structure for a bridge housing, characterized in that, The core box structure comprises a lower core box and an upper core box located above the lower core box; The lower core box has a lower parting surface, and a first lower cavity and two second lower cavities located at opposite sides of the first lower cavity are formed by concave setting of the lower core box from the lower parting surface downward, the two second lower cavities extend along the longitudinal direction of the bridge shell core box structure and communicate with the first lower cavity; The upper core box has an upper parting surface corresponding to the lower parting surface, and a first upper cavity corresponding to the first lower cavity and two second upper cavities extending along the longitudinal direction and communicating with the first upper cavity are formed by concave setting of the upper core box from the upper parting surface upward, the first upper cavity penetrates through the top surface of the upper core box upward and forms a first sand inlet on the top surface of the upper core box, and each second upper cavity corresponds to a second lower cavity, and each second upper cavity penetrates through the top surface of the upper core box upward and forms a second sand inlet on the top surface of the upper core box.
2. The bridge core box structure of claim 1, wherein, The top surface of the upper core box forms a first reference surface corresponding to the first upper cavity, and a second reference surface corresponding to each second upper cavity is formed on the top surface of the upper core box, and the second reference surface is lower than the first reference surface.
3. The bridge core box structure of claim 2, wherein, The top surface of the upper core box is concavely set to form a groove corresponding to each second upper cavity, the groove surrounds the outside of the second sand inlet and penetrates through the opposite outer side walls of the upper core box along the transverse direction of the bridge shell core box structure, and the bottom surface of the groove forms the second reference surface.
4. The bridge core box structure of claim 1, wherein, The lower parting surface is concavely set to form a fixing groove corresponding to each second lower cavity and away from one end of the first lower cavity, the fixing groove extends toward the second lower cavity and communicates with the second lower cavity, each fixing groove is embedded with a positioning block, each positioning block is concavely set to form a positioning groove corresponding to the first inner side wall of the end surface of the second lower cavity, and the bridge shell core box structure further comprises a core bone, and the two ends of the core bone are matched with the two positioning grooves respectively.
5. The bridge core box structure of claim 4, wherein, The top surface of the positioning block is in the same plane as the lower parting surface, and each first inner side wall is convexly set to form a convex part corresponding to the end of the core bone, the convex part extends upward to the top surface of the positioning block and is concavely set to form a positioning groove near the side wall of the second lower cavity, the positioning groove penetrates through the top surface of the positioning block upward, and the core bone is higher than the top surface of the positioning block.
6. The bridge core box structure of claim 4, wherein, The upper parting surface is concavely set to form a limiting groove corresponding to each fixing groove, each limiting groove is embedded with a positioning block, the bottom surface of the positioning block arranged in the limiting groove is in the same plane as the upper parting surface, and the upper end and the lower end of each end of the core bone are matched with the corresponding limiting groove and positioning groove respectively.
7. The bridge core box structure of claim 4, wherein, The core bone is a metal pipe or a metal rod.