Adjustable sand mold casting sand box for industrial speed reducer accessories

Abstract

An adjustable sand mold casting sand box for industrial speed reducer accessories relates to the technical field of casting sand boxes and comprises an upper box body and a lower box body arranged below the upper box body, and a plurality of longitudinally distributed first box belts and a plurality of transversely distributed second box belts are arranged in the upper box body and the lower box body. The two ends of the first box belt and the two ends of the second box belt are movably matched with the upper box body and the lower box body respectively, the first box belt and the second box belt are connected in a clamped mode, fixing bases are arranged at the front end and the rear end of the upper box body and the front end and the rear end of the lower box body respectively, an upper hexagonal limiting hole is formed in the bottom of the upper fixing base, and a lower hexagonal limiting hole is formed in the top end of the lower fixing base. And the lower hexagonal limiting holes and the upper hexagonal limiting holes are inserted and positioned through hexagonal limiting columns. According to the scheme, the problem that the sand box cannot flexibly adapt to molding sand fixing and supporting requirements of different castings is solved.

Description

Technical Field

[0001] This utility model relates to the field of casting sand box technology, specifically an adjustable sand mold casting sand box for industrial speed reducer accessories. Background Technology

[0002] A sand box is a piece of equipment used in sand casting to contain and hold molding sand. It typically consists of a box body and reinforcing straps. The box body is generally a rectangular or circular frame structure, often made of cast iron, cast steel, or aluminum alloy, possessing sufficient strength and rigidity to withstand the compaction pressure of the molding sand and the impact force of the molten metal during pouring. The reinforcing straps are reinforcing structures installed inside the box, commonly appearing as crisscrossing ribs, rings, or combinations thereof. Their function is to enhance the overall strength of the sand box and aid in the fixation of the molding sand.

[0003] For example, the Chinese authorized patent CN212945321U, entitled "A casting sand box for large casting products", includes an upper box and a lower box. The lower box is a square frame structure with an opening at the top and a grid structure at the bottom. Several protruding strips are evenly distributed on the side plate of the lower box. The upper box is a square frame structure with an opening at the bottom and a grid structure at the top. The upper box is equipped with a first adjustment module, a second adjustment module and a third adjustment module.

[0004] The existing technologies mentioned above are inadequate in meeting the diverse types and large differences in shape and size of castings. Traditional fixed sand boxes with sand can not flexibly adapt to the sand fixing and support requirements of different castings, and it is difficult to control the compaction distribution of different castings. As a result, castings are prone to quality problems such as low dimensional accuracy, deformation, and stress concentration. Therefore, they do not meet the current needs. In response, we propose an adjustable sand casting sand box for industrial speed reducer accessories. Utility Model Content

[0005] The purpose of this utility model is to provide an adjustable sand casting sand box for industrial speed reducer accessories, so as to solve the problem mentioned in the background art that the sand box cannot flexibly adapt to the molding sand fixing and support requirements of different castings.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable sand casting sand box for industrial speed reducer parts, comprising an upper box and a lower box disposed below the upper box. The upper and lower boxes are provided with a plurality of longitudinally distributed first box belts and a plurality of transversely distributed second box belts inside. The two ends of the first and second box belts are respectively movably engaged with the upper and lower boxes, and the first and second box belts are interlocked. The front and rear ends of the upper and lower boxes are provided with fixed seats. The bottom of the upper fixed seat is provided with an upper hexagonal limiting hole, and the top of the lower fixed seat is provided with a lower hexagonal limiting hole. The lower hexagonal limiting hole and the upper hexagonal limiting hole are positioned by a hexagonal limiting post.

[0007] Preferably, the upper end of the first car seat is provided with a plurality of equidistant first slots, and the lower end of the second car seat is provided with a plurality of equidistant second slots, and the first slots and the second slots engage with each other.

[0008] Preferably, the inner walls of the upper and lower boxes are provided with multiple equidistant limiting grooves, which are arc-shaped. The two ends of the first and second belts are slidably connected to the limiting grooves. The bottoms of the upper and lower boxes are integrally formed with a support frame to support the bottoms of the first and second belts.

[0009] Preferably, a fixing plate is welded and fixed to the upper end of the fixing base mentioned above. A rotating pull block is slidably installed inside the fixing plate. The rotating pull block rotates and engages with the fixing plate. The bottom of the rotating pull block is fixed to the hexagonal limiting post. A spring is provided on the outside of the rotating pull block at the lower end of the fixing plate. The upper and lower ends of the spring are in contact with the fixing plate and the hexagonal limiting post, respectively.

[0010] Preferably, both sides of the upper housing are integrally formed with upper connecting seats, and fastening bolts are installed inside the upper connecting seats. Both sides of the lower housing are integrally formed with lower connecting seats, and the fastening bolts are threaded into the screw holes inside the lower connecting seats.

[0011] Preferably, each of the fixed bases is welded and fixed with a lifting column on its outer side.

[0012] Preferably, both the upper and lower housings have multiple air holes on their side walls.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model allows for adjustment of the belts inside the sand box. The belts are configured according to the specifications of the gearbox parts being produced. First, the first belt is longitudinally aligned with the front and rear limiting grooves inside the box and inserted until the bottom of the first belt contacts the upper surface of the support frame. Then, the second belt is transversely aligned with the limiting grooves on both sides inside the box and inserted. During insertion, the second groove at the lower end of the second belt engages with the first groove at the upper end of the first belt. This divides the internal area of ​​the box and ensures stable installation of the belts inside, effectively guaranteeing the fixing effect of the molding sand and preventing sand displacement during casting. This improves the dimensional accuracy and surface quality of the gearbox part castings, reduces the defect rate, and reduces the number of sand boxes needed to accommodate different specifications of gearbox parts.

[0015] 2. This utility model achieves positioning through fixed seats at the front and rear ends of the upper and lower boxes. After the sand core is formed inside the sand box, the upper and lower boxes are joined together. At this time, the hexagonal limiting post inside the fixed seat of the upper box is located above the upper hexagonal limiting hole. Since the two are not aligned, the hexagonal limiting post cannot pass through the upper hexagonal limiting hole. The user rotates the rotating block to drive the hexagonal limiting post to rotate slowly. When the hexagonal limiting post is aligned with the upper hexagonal limiting hole, the elastic return of the spring causes the hexagonal limiting post to quickly pass through the upper hexagonal limiting hole and extend downward until it passes through the lower hexagonal limiting hole, thus achieving the positioning of the upper and lower boxes. This improves the accuracy of sand box positioning and effectively avoids damage to the sand core during the box joining process due to positioning deviation, ensuring the integrity of the sand core. Moreover, the operation process is relatively simple. With the elastic assistance of the spring, the manual input is reduced and the efficiency of box positioning is improved. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 For the present utility model Figure 1 Enlarged view of a portion of region A in the middle;

[0019] Figure 4 This is a schematic diagram of the positioning structure of the upper and lower boxes of this utility model.

[0020] In the diagram: 1. Upper housing; 2. Lower housing; 3. Fixed base; 4. Lifting column; 5. First housing belt; 6. First slot; 7. Second housing belt; 8. Second slot; 9. Air hole; 10. Upper connecting base; 11. Lower connecting base; 12. Fastening bolt; 13. Fixed plate; 14. Rotating pull block; 15. Lower hexagonal limiting hole; 16. Hexagonal limiting post; 17. Spring; 18. Upper hexagonal limiting hole; 19. Limiting groove; 20. Support base frame. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1-4An embodiment of this utility model provides: an adjustable sand casting sand box for industrial reducer accessories, including an upper box 1 and a lower box 2 disposed below the upper box 1. The upper box 1 and the lower box 2 are provided with a plurality of longitudinally distributed first box belts 5 and a plurality of transversely distributed second box belts 7. The two ends of the first box belts 5 and the second box belts 7 are respectively movably engaged with the upper box 1 and the lower box 2, and the first box belts 5 and the second box belts 7 are interlocked. The upper end of the first box belts 5 is provided with a plurality of equidistantly distributed first slots 6, and the lower end of the second box belts 7 is provided with a plurality of equidistantly distributed second slots 8, and the first slots 6 and the second slots 8 are interlocked. The front and rear ends of the upper box 1 and the lower box 2 are provided with fixed seats 3, and the outer sides of the fixed seats 3 are welded and fixed with lifting columns 4. The side walls of the upper box 1 and the lower box 2 are provided with a plurality of air holes 9.

[0023] During sand mold making, based on the size and shape requirements of the reducer components, the first belt box 5 is adjusted to a suitable position along the inner walls of the upper and lower housings to achieve initial longitudinal positioning. Subsequently, the second belt box 7 is similarly adjusted to the predetermined position, so that the second slot 8 at the lower end of the second belt box 7 engages with the first slot 6 at the upper end of the first belt box 5. The first belt box 5 and the second belt box 7 form a stable grid-like support structure, providing good fixation and support for the molding sand inside the housing. The front and rear fixing seats 3 are used for positioning and connection during subsequent mold assembly operations, while the lifting columns 4 facilitate the transport of the sand box using lifting equipment. The vent holes 9 on the side walls allow gas to escape from the molding sand during pouring, preventing defects such as porosity in the casting due to residual gas. This adjustable belt box structure design enhances the adaptability of the sand box to reduce the number of sand boxes needed to accommodate various components, thus lowering production costs. Meanwhile, the grid-like box-belt support structure improves the stability of the molding sand within the sand box, which helps ensure the quality of the sand mold and thus improves the dimensional accuracy and surface quality of the castings.

[0024] Please see Figure 1 and Figure 2 The upper box 1 and the lower box 2 are provided with multiple equidistantly distributed limiting grooves 19 on their inner walls. The limiting grooves 19 have an arc-shaped structure, and the two ends of the first box belt 5 and the second box belt 7 are slidably connected to the limiting grooves 19 respectively. The bottom of the upper box 1 and the lower box 2 are integrally formed with a support base frame 20, which is used to support the bottom of the first box belt 5 and the second box belt 7.

[0025] The sliding connection structure at both ends of the first and second molding belts 5 and 7 allows the molding belts to slide smoothly along the limiting grooves 19, achieving precise position adjustment. The arc-shaped structure of the limiting grooves 19 matches the ends of the molding belts, ensuring both the flexibility of the sliding and, to a certain extent, limiting the molding belts to prevent them from shifting during sliding. Once the molding belts are adjusted to the correct position, the bottom support frame 20 provides stable support for the molding belts, bearing part of the weight of the molding belts and molding sand, ensuring the stability of the molding belts within the sand box. The limiting grooves 19 provide precise guidance for the adjustment of the molding belts, enabling operators to quickly and accurately adjust the molding belts to the required position, improving work efficiency. The arc-shaped structure and the support frame 20 work together to enhance the stability of the molding belts after installation, further ensuring the fixation effect of the molding sand within the sand box, reducing the possibility of displacement of the molding sand during handling and pouring, and contributing to improved casting quality.

[0026] Please see Figure 3 and Figure 4 The upper fixed base 3 has an upper hexagonal limiting hole 18 at its bottom and a lower hexagonal limiting hole 15 at its top. The lower hexagonal limiting hole 15 and the upper hexagonal limiting hole 18 are connected and positioned by a hexagonal limiting post 16. A fixed plate 13 is welded and fixed to the upper end of the upper fixed base 3. A rotating pull block 14 is slidably installed inside the fixed plate 13. The rotating pull block 14 is rotatably engaged with the fixed plate 13, and the bottom of the rotating pull block 14 is fixed to the hexagonal limiting post 16. A spring 17 is provided on the outside of the rotating pull block 14 at the lower end of the fixed plate 13, and the upper and lower ends of the spring 17 are in contact with the fixed plate 13 and the hexagonal limiting post 16, respectively.

[0027] After the sand core is formed inside the sand box, during the box assembly operation, the upper box 1 and lower box 2 are initially positioned using the front and rear fixing seats 3. At this time, the upper hexagonal limiting hole 18 at the bottom of the fixing seat 3 of the upper box 1 roughly corresponds to the lower hexagonal limiting hole 15 at the top of the fixing seat 3 of the lower box 2, but the hexagonal limiting post 16 is not initially aligned with the upper hexagonal limiting hole 18. The operator rotates the rotating pull block 14. Since the rotating pull block 14 is in rotational engagement with the fixing plate 13 and its bottom is fixed to the hexagonal limiting post 16, it drives the hexagonal limiting post 16 to rotate synchronously. When the angle of the hexagonal limiting post 16 is adjusted to align with the upper hexagonal limiting hole 18, under the elastic restoring force of the spring 17, the hexagonal limiting post 16 quickly passes downward through the upper hexagonal limiting hole 18 and continues to extend through the lower hexagonal limiting hole 15, thereby achieving precise positioning of the upper box 1 and lower box 2. This positioning method improves the accuracy of the sand box assembly positioning. The operation of the rotating pull block 14 provides operators with flexible adjustment space, enabling precise control of the rotation angle of the hexagonal limit post 16 according to actual conditions, ensuring positioning accuracy. The elastic assistance of the spring 17 not only makes the positioning process smoother and reduces the difficulty of manual operation, but also improves positioning efficiency. Precise box-closing positioning effectively avoids damage to the sand core during the box-closing process due to positioning deviations, ensuring the integrity of the sand core.

[0028] Please see Figure 1 and Figure 2 Both sides of the upper housing 1 are integrally formed with upper connecting seats 10, and fastening bolts 12 are installed inside the upper connecting seats 10. Both sides of the lower housing 2 are integrally formed with lower connecting seats 11, and the fastening bolts 12 and the screw holes inside the lower connecting seats 11 are threaded together.

[0029] After the upper housing 1 and lower housing 2 are positioned by the hexagonal limiting post 16, the fastening bolt 12 is passed through the upper connecting seat 10 and screwed into the threaded hole inside the lower connecting seat 11. By tightening the fastening bolt 12, the upper housing 1 and lower housing 2 are tightly connected together by the tightening action of the threads, forming a complete and stable sand box structure to withstand the pressure and other external forces of the liquid metal during subsequent pouring, further enhancing the stability of the connection between the upper and lower housings.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An adjustable sand casting flask for industrial reducer accessories, comprising an upper flask (1) and a lower flask (2) arranged below the upper flask (1), characterized in that: The upper box body (1) and the lower box body (2) are internally provided with a plurality of longitudinally distributed first box belts (5) and a plurality of transversely distributed second box belts (7), both ends of the first box belts (5) and the second box belts (7) are movably connected with the upper box body (1) and the lower box body (2) respectively, and the first box belts (5) are clamped with the second box belts (7), the front end and the rear end of the upper box body (1) and the lower box body (2) are provided with fixing seats (3), the bottom of the fixing seat (3) is provided with an upper hexagonal limiting hole (18), the top of the fixing seat (3) is provided with a lower hexagonal limiting hole (15), and the lower hexagonal limiting hole (15) and the upper hexagonal limiting hole (18) are connected and positioned through a hexagonal limiting column (16).

2. An adjustable sand casting flask for industrial reducer accessories according to claim 1, characterized in that: The upper end of the first box belt (5) is provided with a plurality of equidistantly distributed first clamping grooves (6), the lower end of the second box belt (7) is provided with a plurality of equidistantly distributed second clamping grooves (8), and the first clamping grooves (6) are clamped and matched with the second clamping grooves (8).

3. An adjustable sand casting flask for industrial reducer accessories according to claim 1, characterized in that: The inner walls of the upper box body (1) and the lower box body (2) are both provided with a plurality of equidistantly distributed limiting grooves (19), the limiting grooves (19) are in arc-shaped structures, both ends of the first box belts (5) and the second box belts (7) are slidably connected with the limiting grooves (19) respectively, and the bottom of the upper box body (1) and the bottom of the lower box body (2) are integrally formed with support chassis (20) for supporting the bottom of the first box belts (5) and the second box belts (7).

4. An adjustable sand casting flask for industrial reducer accessories according to claim 1, characterized in that: The upper end of the fixing seat (3) is welded with a fixed plate (13), the fixed plate (13) is internally slidably installed with a rotating pull block (14), the rotating pull block (14) is rotatably matched with the fixed plate (13), the bottom of the rotating pull block (14) is fixed with the hexagonal limiting column (16), the outside of one end of the rotating pull block (14) below the fixed plate (13) is provided with a spring (17), and the upper end and the lower end of the spring (17) are respectively in contact with the fixed plate (13) and the hexagonal limiting column (16).

5. An adjustable sand casting flask for industrial reducer accessories according to claim 1, characterized in that: Both sides of the upper box body (1) are integrally formed with upper connecting seats (10), the inside of the upper connecting seat (10) is installed with a fastening bolt (12), both sides of the lower box body (2) are integrally formed with lower connecting seats (11), and the fastening bolt (12) is threadedly matched with the screw hole in the inside of the lower connecting seat (11).

6. An adjustable sand casting flask for industrial reducer accessories according to claim 1, characterized in that: The outer sides of the fixing seats (3) are welded with lifting columns (4).

7. An adjustable sand casting flask for industrial reducer accessories according to claim 1, characterized in that: The sidewalls of the upper box body (1) and the lower box body (2) are both provided with a plurality of air holes (9).

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