Casting shell with double-female-column structure

Abstract

The casting shell with the double-female-column structure comprises a shell body and double female columns, the shell body is provided with a preset installation hole site, an annular installation boss arranged beside the hole site in a surrounding mode is arranged on the front face of the shell body, an installation groove used for installing the double female columns is formed by the annular installation boss, the section of the installation groove is in a polygon shape, and the double female columns are arranged in the installation groove. The mounting groove is used for realizing circumferential constraint on the double female columns, so that the mounting column is effectively prevented from rotating in the groove, stable circumferential fixation is realized, meanwhile, the mounting groove is of a linear change structure from the groove opening to the groove bottom, the whole mounting groove is in a cone-like shape, and a plurality of annular communication grooves are formed in the inner wall of the mounting groove. The annular grooves are distributed at intervals in the axial direction of the mounting groove. According to the cast shell, the double female columns and the shell are of a split structure, an integral structure is formed through structural engagement, the yield of products is high, the production cost is low, and the stability of the combined structure is good.

Description

Technical Field

[0001] This application relates to the field of cast shells, and in particular to a cast shell with a double male column structure. Background Technology

[0002] Existing technologies have several shortcomings when processing aluminum alloy lower shell parts with double female column structures. These shortcomings are mainly reflected in structural defects during the forming process, difficulty in demolding, quality control of subsequent processing, and overall production yield and efficiency issues.

[0003] Firstly, from the perspective of the die-casting process, the commonly used double-column structure has a diameter of φ2.5mm and a height of 5.2mm. These structural characteristics make it highly susceptible to problems during die-casting. The die-casting process requires injecting molten aluminum alloy into a mold under high pressure. The forming of such a slender double-column structure within the mold is severely limited by the material's fluidity. The molten aluminum alloy needs to evenly fill all the details of the mold, but due to the small diameter and relatively high height of the double-column section, the flow and filling of material in these areas often become uneven, leading to the formation of tiny sand holes or insufficient material density inside the column. These inherent defects may not be directly observable on the column's exterior, but they directly affect subsequent machining.

[0004] Secondly, the demolding process after die casting is also a major challenge in the formation of double-column structures. Due to the column's height and small diameter, stress concentration can easily occur during demolding if the mold design is inadequate or the material cooling is uneven. This stress concentration can lead to scratches or abrasions on the column surface, resulting in a rough surface and affecting the product's aesthetics. Especially in applications where a smooth surface is required, surface scratches directly impact product quality. Furthermore, due to scratches during demolding, micro-cracks may even appear in localized areas of the column. These cracks may propagate during subsequent use, affecting the product's reliability and lifespan.

[0005] Furthermore, the double-camber design requires drilling and tapping after die casting. This machining process demands very high precision; for example, the standard thread size is M1.6, and the drilling depth is at least 4mm. These requirements significantly increase the difficulty of the machining process, especially when sand holes or other forming defects exist inside the column. During drilling, localized material collapse or drill bit misalignment may occur. This makes it impossible to guarantee the positional accuracy of the drilling, and the quality of the hole wall may become rough due to collapse, leading to uneven thread formation during tapping. In addition, sand holes or other defects inside the column often result in insufficient thread strength after tapping, preventing effective thread engagement and causing loose connections during assembly. In some cases, the screws may even come loose or come off under external force, severely impacting the product's functionality and safety.

[0006] For the reasons mentioned above, from a production yield perspective, existing technologies exhibit a very high defect rate in the manufacturing of double-column aluminum alloy lower shell parts. During die casting, the unique diameter-to-height ratio of the columns makes them highly susceptible to surface defects during forming and demolding. Statistics show that approximately 50% of products have appearance defects after forming. These defects include surface scratches, material loss, and localized protrusions, all of which lead to substandard product appearance and quality. Furthermore, the defect rate in subsequent drilling and tapping processes is as high as 70%, with defects mainly manifesting as incomplete thread formation, sand holes within the holes, and discontinuous threads. These high defect rates not only increase production costs but also hinder large-scale production. Each qualified product requires multiple reworks or even scrapping, significantly impacting production efficiency and the company's economic benefits.

[0007] Using integrated casting for the above structure also presents another problem: mold wear. Specifically, during the forming process, due to the small diameter of the double female columns, the friction between them and the inner wall of the mold is very high during demolding, leading to faster wear in localized areas of the mold and significantly shortening its service life. After mold wear, the precision and surface quality of the formed product will further deteriorate. The produced double female columns may exhibit dimensional deviations and increased surface roughness, resulting in more defective products. This not only increases the maintenance and replacement costs of the mold but also adversely affects the stability of the entire production process.

[0008] In summary, existing technologies for producing aluminum alloy lower shell parts with double female pillar structures suffer from numerous shortcomings, including unstable forming quality, susceptibility to damage during demolding, difficulties in subsequent processing, low overall yield, rapid mold wear, and insufficient production capacity. These problems not only affect product production efficiency and quality but also severely impact the company's economic benefits and market competitiveness, necessitating breakthroughs and improvements through new technologies. Utility Model Content

[0009] The purpose of this application is to overcome at least one deficiency of the prior art and provide a cast shell with a double male column structure. The double male columns of the cast shell are separate from the shell and are formed into an integral structure by structural interlocking. The product has a high yield rate, low production cost and good structural stability after assembly.

[0010] To achieve the above objectives, this application discloses a cast shell component with a double-column structure, comprising a shell and double columns.

[0011] The housing has preset mounting holes, and an annular mounting boss is provided on the front of the housing surrounding the holes. The annular mounting boss forms a mounting groove for mounting the double female columns. The cross-section of the mounting groove is polygonal, which is used to achieve circumferential constraint on the double female columns, thereby effectively preventing the mounting columns from rotating in the groove and achieving stable circumferential fixation. At the same time, the mounting groove has a linearly changing structure from the groove opening to the groove bottom, making the mounting groove as a whole conical shape. The inner wall of the mounting groove is provided with multiple annular communication grooves, which are distributed at intervals along the axial direction of the mounting groove.

[0012] The double female column is a hollow column with a positive internal thread on one side and a negative internal thread on the other side inside the hollow channel. The shape of the double female column is adapted to the mounting groove. The double female column has a mounting end for insertion and fixing in the mounting groove. The mounting end is tapered and adapted to the mounting groove. The outer surface of the mounting end is provided with multiple annular communication grooves. These annular grooves are distributed at intervals along the axial direction of the double female column.

[0013] The mounting end of the double female column is inserted into the mounting groove, and the double female column is pressed and locked in the mounting groove by inserting it through the mounting hole from the back of the housing and engaging with the double female column through the thread.

[0014] In some embodiments, a rubber ring indicating preload is installed at the bottom of the mounting groove. When the double female columns are locked in the mounting groove, the end faces of the mounting ends of the double female columns press against the rubber ring, and the rubber ring provides a reverse preload to the double female columns.

[0015] In some embodiments, the cross-section of the mounting groove is a rounded rectangle.

[0016] Compared with the prior art, this application has at least one of the following beneficial effects:

[0017] 1. Improve product yield: By designing the double female column and shell as separate structures and forming an integrated structure through structural interlocking, the inherent defects of double female column forming in traditional die casting process, such as sand holes and insufficient material density, are avoided, which significantly improves the forming quality and yield of the product.

[0018] 2. Reduced production costs: Since the double female columns and the shell are processed separately and assembled by threaded connection, the complex subsequent processing requirements are reduced, the processing difficulty and scrap rate are reduced, thereby reducing production costs.

[0019] 3. Enhanced structural stability: The polygonal mounting slot and annular groove design provide good circumferential constraint and fixation, making the double male columns more stable in the mounting slot, preventing rotation and loosening, and improving the overall stability of the structure.

[0020] 4. Extend mold life: The split design avoids local wear caused by the slender structure of the double female pillars during the molding process, thus extending the service life of the mold and reducing the frequency of mold maintenance and replacement.

[0021] The beneficial effects listed above are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation methods will be further disclosed in the embodiments or other descriptive sections of this application. Attached Figure Description

[0022] A better understanding of various aspects of this disclosure will be achieved by reading the following detailed description in conjunction with the accompanying drawings. The positions, dimensions, and extents of the structures shown in the drawings, etc., do not always represent actual positions, dimensions, and extents. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment disclosed in this application.

[0024] Figure 2 This is a schematic diagram of the shell structure in one embodiment of the present application.

[0025] Figure 3 yes Figure 2 A in the enlarged view.

[0026] Figure 4 This is a schematic diagram of the overall structure of one embodiment disclosed in this application from another perspective.

[0027] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure of AA in the diagram.

[0028] Figure 6 yes Figure 5 Enlarged view of point B in the image. Detailed Implementation

[0029] The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

[0030] It should be understood that the same reference numerals denote the same elements in all the accompanying drawings. For clarity, the dimensions of certain features may be modified in the drawings.

[0031] It should be understood that the terminology used in this specification is for describing specific embodiments only and is not intended to limit this disclosure. All terms used in this specification (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. For the sake of brevity and / or clarity, techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail; however, where appropriate, such techniques, methods, and apparatus should be considered part of this specification.

[0032] Unless otherwise specified, the singular forms “a,” “the,” and “the” used in this specification include the plural forms. The terms “comprising,” “including,” and “containing” used in this specification indicate the presence of the claimed feature but do not exclude the presence of one or more other features. The term “and / or” used in this specification includes any and all combinations of one or more of the relevant listed items. Example

[0033] like Figures 1 to 6 As shown, this embodiment discloses a cast shell with a double female column 2 structure. The shell includes a shell 1 and double female columns 2. The overall structure is carefully designed to ensure that the double female columns 2 can be stably installed, thereby avoiding rotation and loosening, and improving the stability and durability of the equipment. Specifically, the shell 1 has pre-set mounting holes 3, and the front side is provided with an annular mounting boss 4 around the mounting holes 3. The boss forms a mounting groove 5 for mounting the double female columns 2.

[0034] The mounting groove 5 has a polygonal cross-section, such as a rounded rectangle. This design effectively constrains the double female columns 2 circumferentially, preventing them from rotating within the groove and achieving a stable fixation. Furthermore, the mounting groove 5 changes linearly from its opening to its bottom, giving it a conical shape. This conical design effectively guides the insertion of the double female columns 2, improving installation stability. The inner wall of the mounting groove 5 has multiple annular grooves along its axial direction. These grooves are spaced apart, providing cushioning and adaptability during installation, further enhancing the installation's robustness.

[0035] The double female column 2 is a hollow structure with internal threads in both directions; one side has a positive internal thread, and the other side has a negative internal thread. This design facilitates reverse locking and enhances installation stability. The mounting end 201 of the double female column 2 corresponds to the mounting groove 5 and is tapered to ensure a tight fit. The outer surface of the mounting end 201 also has annular grooves, which are spaced axially and interact with the grooves in the mounting groove 5 to effectively alleviate stress concentration during installation and improve the tightness of the connection.

[0036] During installation, the mounting end 201 of the double female column 2 is inserted into the mounting groove 5 and secured through the mounting hole 3 on the back of the housing 1. Specifically, the bolt 6 is inserted through the mounting hole 3 and engages with the threaded part of the double female column 2 to fix it in the mounting groove 5. This threaded fastening method not only simplifies the installation process but also ensures the stability of the connection during long-term use, preventing loosening. Simultaneously, the rotation of the threads generates additional locking force, further enhancing the installation strength of the double female column 2.

[0037] To enhance installation reliability, a rubber ring is provided at the bottom of the mounting groove 5. Once the double female columns 2 are fully inserted and locked, their mounting ends 201 press against the rubber ring. The rubber ring, through elastic deformation, provides a reverse preload to the double female columns 2, thus maintaining a stressed state after installation and preventing loosening due to vibration or other external forces. The rubber ring is made of durable and pressure-resistant rubber to ensure stable preload under various environmental conditions. Simultaneously, the elastic deformation of the rubber ring under compression effectively buffers impact forces during installation, reducing damage to the housing 1 and the double female columns 2, further extending their service life.

[0038] In this embodiment, the mounting groove 5 is designed with a rounded rectangular cross-section, which provides support for the double female columns 2 in multiple directions, preventing them from rotating or shifting under external forces. This polygonal design is particularly suitable for connection structures that require long-term stability, such as fixed components in mechanical equipment. The rounded rectangular design provides multi-point support, constraining the double female columns 2 in different directions and improving the overall connection stability. The tight fit between the housing 1 and the double female columns 2, along with the design of the annular groove and rubber ring, collectively enhance the strength and stability of the connection. Furthermore, the annular groove increases the contact area, providing additional friction and further enhancing the reliability of the overall connection.

[0039] This embodiment provides a clear understanding of the structure of the cast shell and its installation method. This embodiment not only considers ease of installation in its design but also ensures stability and reliability during long-term use through detailed optimizations. In specific application scenarios, such as the installation of mechanical equipment, this embodiment significantly reduces maintenance requirements and extends the equipment's lifespan. Especially in high-load and high-vibration mechanical equipment, the design effectively prevents loosening and wear caused by vibration, ensuring long-term stable operation of the equipment. Simultaneously, the preload provided by the rubber ring enhances the stability of the double female columns 2, maintaining a stable installation even under vibration or changes in ambient temperature. Compared to traditional installation methods, the design of this embodiment significantly reduces maintenance costs and improves the overall performance and stability of the equipment.

[0040] In practical applications, the structural design of the double female column 2 can adapt to various installation environments, such as high temperature, high humidity, or strong vibration conditions. The rounded rectangular mounting groove 5, combined with the buffering effect of the rubber ring, enables this embodiment to operate normally under various complex conditions. In addition, the positive and negative internal thread design of the double female column 2 makes it very convenient to install and disassemble; disassembly can be completed simply by rotating the bolt 6, facilitating subsequent maintenance and replacement.

[0041] To expand its application scenarios, the double female column 2 is not only suitable for installation connections in mechanical equipment, but can also be used as a support component in fields such as building engineering. In equipment that requires frequent disassembly and assembly, the design of the double female column 2 can significantly improve disassembly and assembly efficiency and reduce wear and connection failures caused by frequent operation.

[0042] Furthermore, the design using rubber rings to provide reverse preload not only enhances the stability of the double male columns 2 but also improves the fatigue resistance of the equipment during long-term use. The buffering effect of the rubber rings allows the entire installation structure to effectively absorb energy under vibration and impact, reducing stress concentration and thus preventing material damage due to fatigue. This design is crucial in applications requiring high strength and stability, such as equipment installation in industrial production lines, as it effectively reduces downtime caused by equipment failure and improves production efficiency.

[0043] In this embodiment, the conical structure design of the mounting groove 5 and the mounting end 201 of the double female columns 2 makes the insertion and assembly of the double female columns 2 more convenient. At the same time, the structure of the annular groove allows the contact surfaces to interlock, increasing friction. Even when the bolt 6 is not inserted, the double female columns 2 can still achieve a certain connection force through the interaction force between them and the mounting groove 5. This has a positive impact on automated production and structural stability.

[0044] In summary, this embodiment provides a well-designed, securely installed, and highly adaptable cast shell structure. Through rational design, the stable installation and long-term reliability of the double female columns 2 are ensured. In various mechanical equipment installation scenarios, this structure can significantly improve equipment efficiency and stability, reduce the risk of equipment failure due to loose connections, and improve overall production efficiency. Compared with traditional installation methods, this embodiment not only enhances connection stability but also provides additional protection and cushioning through rubber rings, resulting in excellent performance and reliability in various usage scenarios. Through the aforementioned improvements and innovations, this embodiment demonstrates superior performance in various complex environments and applications, improves equipment reliability and service life, and significantly reduces maintenance costs and downtime risks, bringing users greater economic benefits and practical value.

[0045] While exemplary embodiments of this disclosure have been described, those skilled in the art will understand that various changes and modifications can be made to the exemplary embodiments of this disclosure without departing from the spirit and scope thereof. Therefore, all changes and modifications are included within the scope of protection of this disclosure as defined by the claims. This disclosure is defined by the appended claims, and equivalents of those claims are also included.

Claims

1. A cast shell with a double male column structure, characterized in that, include: The housing comprises a shell and two female columns. The shell has preset mounting holes, and an annular mounting boss is provided on the front of the shell surrounding the holes. The annular mounting boss forms a mounting groove for mounting the two female columns. The cross-section of the mounting groove is polygonal, which is used to achieve circumferential constraint on the two female columns, thereby effectively preventing the mounting columns from rotating in the groove and achieving stable circumferential fixation. At the same time, the mounting groove has a linearly changing structure from the groove opening to the groove bottom, making the mounting groove as a whole conical shape. The inner wall of the mounting groove is provided with multiple annular communication grooves, which are distributed at intervals along the axial direction of the mounting groove. The double female column is a hollow column with a positive internal thread on one side and a negative internal thread on the other side inside the hollow channel. The shape of the double female column is adapted to the mounting groove. The double female column has a mounting end for insertion and fixing in the mounting groove. The mounting end is tapered and adapted to the mounting groove. The outer surface of the mounting end is provided with multiple annular communication grooves. These annular grooves are distributed at intervals along the axial direction of the double female column. The mounting end of the double female column is inserted into the mounting groove, and the double female column is pressed and locked in the mounting groove by inserting it through the mounting hole from the back of the housing and engaging with the double female column through the thread.

2. A cast shell with a double male column structure as described in claim 1, characterized in that: A rubber ring indicating preload is installed at the bottom of the mounting groove. When the double female columns are locked in the mounting groove, the end faces of the mounting ends of the double female columns press against the rubber ring, and the rubber ring provides a reverse preload to the double female columns.

3. A cast shell with a double male column structure as described in claim 1, characterized in that: The cross-section of the mounting groove is a rounded rectangle.

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