Gear ring sand core structure

By designing a ring-tooth sand core structure including upper sand core and lower sand core, using the splicing form of convex edges and grooves and the assembly method of lower convex feet and pits, the casting problem of complex gear inner contours is solved, the stable shape and firm assembly of the sand core are achieved, and the casting requirements of gear components in the robotic arm are met.

CN222643176UActive Publication Date: 2025-03-21CHANGJIAN HUAXIN ROBOT PARTS NANTONG CO LTD
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Patent Information

Application Number
CN202421937965.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-12
Publication Date
2025-03-21
Estimated Expiration
2034-08-12

AI Technical Summary

Technical Problem

When the inner contour of the gear is relatively complex, it is difficult to separate the integrated sand core in the sand box, which increases the manufacturing difficulty and assembly complexity, and cannot meet the casting requirements of gear components in the robotic arm.

Method used

A ring-toothed sand core structure is designed, including the upper sand core and the lower sand core. It is spliced ​​by convex and grooves that match each other with concave and convex convexity, and a lower convex foot is arranged at the bottom of the upper sand core to match the pits of the lower sand core to ensure coaxial assembly and stable shape.

Benefits of technology

The sand core structure is suitable for split sand boxes. It is assembled firmly after splicing and has a stable shape, which avoids the infiltration of molten iron and meets the casting requirements of gear components in the robotic arm.

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Abstract

The utility model discloses a gear ring sand core structure which comprises an upper sand core which is in a circular tube shape, the upper sand core comprises a first upper sand core and a second upper sand core which are spliced with each other, the cross section outlines of the upper sand core and a lower sand core are C-shaped, and the first upper sand core and the second upper sand core are spliced through convex edges and grooves which are matched with each other in a concave-convex mode. A plurality of lower convex feet are also arranged at the bottom of the upper sand core; the lower sand core is in a circular ring shape and is provided with a plurality of concave pits for assembling the lower convex feet; and the upper sand core and the lower sand core are coaxially assembled. The utility model can adapt to the split type sand box. And the spliced sand core is firm in assembly and stable in shape, and can meet the casting requirements of gear parts in the mechanical arm.
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