Gearbox casting sand mold structure and casting equipment thereof

Abstract

The utility model discloses a sand mould structure and casting equipment for gear box casting, relates to gear box casting field, including first sand mould, second sand mould, third sand mould, fourth sand mould and inner chamber sand mould, and the first sand mould, second sand mould, third sand mould and fourth sand mould bottom are fixedly connected with inclined block respectively, when the first sand mould and second sand mould are pasted, the inclined block on the first sand mould and second sand mould is pasted, and the inclined surface is outward; When the third sand mould and fourth sand mould are pasted, the inclined block on the third sand mould and fourth sand mould is pasted, and the inclined surface is outward; The inner chamber sand mould is located first sand mould, second sand mould, third sand mould, fourth sand mould inside. Through the inclined block that sets up the sand mould outside, can realize the fixing of four different sand moulds quickly, thereby avoids the situation that the casting size is unqualified due to the inaccuracy of positioning in the casting process, and the device can also quickly take down the sand mould after casting is completed, improves the casting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gearbox casting, specifically a sand mold structure for gearbox casting and its casting equipment. Background Technology

[0002] In gearbox manufacturing, casting is one of the core processes. Sand molds, as key components in forming the casting cavity, directly affect the dimensional accuracy, production efficiency, and product qualification rate of gearbox castings through their structural design and fixing methods. With the increasing demands for product precision in gearbox applications and the manufacturing industry's pursuit of production efficiency, traditional sand mold structures and corresponding casting equipment are gradually revealing many problems that urgently need to be addressed.

[0003] In existing gearbox casting technology, for multi-mold casting scenarios, precise positioning and stable fixing of multiple sand molds are typically required to ensure that they do not shift or misalign during the pouring of molten metal. However, current mainstream sand mold fixing methods often employ complex clamping structures or cumbersome bolt connections. These methods are not only structurally complex and involve tedious installation procedures, but also make it difficult to quickly and accurately fix multiple different sand molds simultaneously. In actual production operations, operators need to spend a significant amount of time adjusting the position of each sand mold and fixing them one by one, increasing labor intensity and making them highly susceptible to inaccurate positioning due to human error. Furthermore, the disassembly process of existing sand mold fixing structures after casting is complete and the casting has cooled is relatively cumbersome, reducing overall casting efficiency.

[0004] Therefore, those skilled in the art urgently need to develop a sand mold structure for gearboxes and matching casting equipment to improve gearbox production efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a sand mold structure for gearbox casting and its casting equipment, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A sand mold structure for gearbox casting includes a first sand mold, a second sand mold, a third sand mold, a fourth sand mold, and an inner cavity sand mold. Inclined blocks are fixedly connected to the bottom of the first, second, third, and fourth sand molds respectively. When the first and second sand molds are fitted together, the first sand mold fits into the inclined blocks on the second sand mold, with the inclined surfaces facing outwards. When the third and fourth sand molds are fitted together, the third sand mold fits into the inclined blocks on the fourth sand mold, with the inclined surfaces facing outwards. The inner cavity sand mold is located inside the first, second, third, and fourth sand molds.

[0007] As a further embodiment of this utility model: a through-type air outlet channel is provided on the inner cavity sand mold.

[0008] As a further embodiment of this utility model: feeding channels are provided on the opposite surfaces of the second and third sand molds, and the pouring port is located on the first sand mold.

[0009] A casting device for any of the above-mentioned sand mold structures includes a base, on which symmetrical through grooves are provided. Sliding rods are slidably connected in each through groove. The bottoms of the two sliding rods are driven to move in opposite directions or in opposite directions by a driving assembly. The tops of the sliding rods are fixedly connected to clamping assemblies for clamping the first sand mold, the second sand mold, the third sand mold, and the fourth sand mold.

[0010] As a further embodiment of this utility model: the driving assembly includes a motor fixed to the side of the base, a screw fixedly connected to the motor rotor, the screw having symmetrically arranged threads on the outer sides, and the lower ends of the sliding rods being threadedly connected to the screws respectively.

[0011] As a further embodiment of this utility model: the clamping assembly includes an elastic telescopic rod fixedly connected to the top of the sliding rod, and a V-shaped clamping block fixedly connected to the side of the elastic telescopic rod facing the sand mold, and the V-shaped clamping block and the inclined block on the same side are movably clamped together.

[0012] As a further embodiment of this utility model: the outer ends of the sliding rods are rotatably connected to auxiliary clamping shafts, both ends of the auxiliary clamping shafts are fixedly connected to gears, the outer sides of the gears are fixedly connected to swing clamping rods, and the base is provided with racks, which mesh with the gears.

[0013] As a further embodiment of this utility model: the rack is slidably connected to the base, and a locking bolt is threaded onto the rack. When the locking bolt passes through the rack and is threadedly connected to the base, the rack is locked.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the structure of this application is simple, and the inclined block set on the outside of the sand mold can quickly fix four different sand molds, thereby avoiding the situation of unqualified casting dimensions caused by inaccurate positioning during the casting process. The device can also quickly remove the sand mold after casting is completed, thus improving casting efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a sand mold structure for gearbox casting.

[0016] Figure 2 This is a schematic diagram showing the exploded structure of the first sand mold, the second sand mold, and the inner cavity sand mold in this application.

[0017] Figure 3 This is a schematic diagram showing the exploded structure of the third sand mold, the fourth sand mold, and the inner cavity sand mold in this application.

[0018] Figure 4 This is a schematic diagram of the casting equipment in this application.

[0019] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0020] Figure 6 This is a schematic diagram of the structure below the base of the casting equipment in this application.

[0021] In the diagram: 1. First sand mold; 2. Second sand mold; 3. Third sand mold; 4. Fourth sand mold; 5. Inner cavity sand mold; 6. Inclined block; 7. Through-type air outlet channel; 8. Compensation channel; 9. Base; 10. Through-type slide groove; 11. Sliding rod; 12. Drive assembly; 13. Clamping assembly; 14. Motor; 15. Screw; 16. Elastic telescopic rod; 17. V-shaped clamping block; 18. Auxiliary clamping shaft; 19. Gear; 20. Swinging clamping rod; 21. Rack; 22. Locking bolt. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example 1: Please refer to Figure 1 , Figure 2 and Figure 3 A sand mold structure for gearbox casting and its casting equipment are disclosed, comprising a first sand mold 1, a second sand mold 2, a third sand mold 3, a fourth sand mold 4, and an inner cavity sand mold 5. Inclined blocks 6 are fixedly connected to the bottom of the first sand mold 1, the second sand mold 2, the third sand mold 3, and the fourth sand mold 4, respectively. When the first sand mold 1 and the second sand mold 2 are fitted together, the first sand mold 1 is fitted with the inclined blocks 6 on the second sand mold 2, with the inclined surfaces facing outwards. When the third sand mold 3 and the fourth sand mold 4 are fitted together, the third sand mold 3 is fitted with the inclined blocks 6 on the fourth sand mold 4, with the inclined surfaces facing outwards. The inner cavity sand mold 5 is located inside the first sand mold 1, the second sand mold 2, the third sand mold 3, and the fourth sand mold 4.

[0027] A through-type air outlet channel 7 is provided on the inner cavity sand mold 5. Figure 2 For example, four air outlet channels are provided, located on both sides of the inner cavity sand mold 5, with two channels on each side. Feeding channels 8 are provided on the opposite surfaces of the second sand mold 2 and the third sand mold 3, and the pouring port is located on the first sand mold 1. In use, the positions of the first sand mold 1 and the second sand mold 2 are aligned, then the positions of the third sand mold 3 and the fourth sand mold 4 are aligned, and the inner cavity sand mold 5 is placed inside the aligned sand molds.

[0028] Please see Figure 4 , Figure 5 and Figure 6 A casting device, applied to the above-mentioned sand mold structure, includes a base 9, on which symmetrical through grooves 10 are provided. Sliding rods 11 are slidably connected in the through grooves 10. The bottoms of the two sliding rods 11 are driven to move towards each other or away from each other by a driving assembly 12. The tops of the sliding rods 11 are fixedly connected to clamping assemblies 13 for clamping the first sand mold 1, the second sand mold 2, the third sand mold 3 and the fourth sand mold 4.

[0029] The drive assembly 12 includes a motor 14 fixed to the side of the base 9. A screw 15 is fixedly connected to the rotor of the motor 14. The screw 15 has symmetrical threads on the outer side. The lower end of the sliding rod 11 is threadedly connected to the screw 15.

[0030] Move the sand mold structure onto the casting equipment, turn on the motor 14, the rotation of the motor 14 drives the screw 15 to rotate, which in turn causes the sliding rods 11 to move in opposite directions. When the sliding rods 11 move in opposite directions, the clamping assembly 13 will clamp the different sand molds to prevent the sand molds from loosening.

[0031] The clamping assembly 13 includes a sliding rod 11 with a flexible telescopic rod 16 fixedly connected to its top. A V-shaped clamping block 17 is fixedly connected to the side of the flexible telescopic rod 16 facing the sand mold. The V-shaped clamping block 17 is movably clamped to the inclined block 6 on the same side. The flexible telescopic rod 16 moves the V-shaped clamping block 17 towards the inclined block 6. When it comes into contact with the inclined block 6, the flexible telescopic rod 16 is compressed as the motor 14 continues to rotate, increasing the clamping force.

[0032] It should be noted that the sand mold 5 in this application utilizes 3D printing technology, reducing the difficulty of modeling and improving production efficiency. The interior of the sand mold is hollowed out to reduce weight and lower costs. As shown in the attached drawings, the casting scheme in this application has been adjusted to a flat-cast, vertical-cast design, avoiding the porosity defects that can easily occur when a large flat surface faces upwards. Furthermore, the four core points of the sand mold 5 are connected to the center, allowing for air venting and ensuring a good casting effect.

[0033] Example 2: This example discloses a technical solution to enhance the clamping effect based on the previous example: Please refer to... Figure 4 and Figure 5 The outer ends of the sliding rod 11 are rotatably connected to auxiliary clamping shafts 18. Gears 19 are fixedly connected to both ends of the auxiliary clamping shafts 18. A swing clamping rod 20 is fixedly connected to the outer side of each gear 19. A rack 21 is provided on the base 9, and the rack 21 meshes with the gears 19. The rack 21 is slidably connected to the base 9, and a locking bolt 22 is threaded onto the rack 21. When the locking bolt 22 passes through the rack 21 and is threaded onto the base 9, it locks the rack 21.

[0034] As the clamping force on the tilting block 6 is continuously increased, the gear 19 meshes with the rack 21, thereby driving the swing clamping rod 20 to rotate around the auxiliary clamping shaft 18. Its end then abuts against the outer surface of the sand mold. By adjusting the position of the rack 21, the starting position of the swing clamping rod 20 can be adjusted, thus matching the position of the swing clamping rod 20 when clamping the sand mold. The swing clamping rod 20 can be composed of a composite structure with two rotating sections connected by a torsion spring, preventing damage to the sand mold after contact. Additionally, a transverse, elastic contact rod can be fixed to the end of the swing clamping rod 20, increasing the contact area and thus improving clamping stability. The swing clamping rod 20 and the V-shaped clamping block 17 clamp each other, one above and one below, ensuring the overall clamping firmness meets casting requirements.

[0035] Working principle: First, match the first sand mold 1 with the second sand mold 2, then match the third sand mold 3 with the fourth sand mold 4; place the inner cavity sand mold 5 into the matched sand mold, and move the whole assembly to the casting equipment. Turn on the motor 14, which drives the screw 15 to rotate, causing the sliding rod 11 to move towards each other; the sliding rod 11, through the elastic telescopic rod 16, drives the V-shaped clamping block 17 to move towards the inclined block 6, and after contact, it continues to rotate with the motor. The elastic telescopic rod 16 is compressed, and the clamping force is increased. Since the clamping surface of the V-shaped clamping block 17 is inclined, it can make the adjacent inclined blocks 6 move closer, so that the corresponding sand mold can be fixed.

[0036] As the clamping force increases, gear 19 meshes with rack 21, causing the swing clamping rod 20 to rotate around auxiliary clamping shaft 18. The end of the swing clamping rod 20 abuts against the outer surface of the sand mold. Adjusting the position of rack 21 changes the starting rotation position of the swing clamping rod 20 to match the sand mold clamping requirements. The swing clamping rod 20 adopts a composite structure with two torsion springs connected to avoid damage when in contact with the sand mold; its end is fixed with an elastic contact rod to increase the contact area and improve clamping stability.

[0037] 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.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sand mold structure for gearbox casting, comprising a first sand mold (1), a second sand mold (2), a third sand mold (3), a fourth sand mold (4), and an inner cavity sand mold (5), characterized in that, The bottom of the first sand mold (1), the second sand mold (2), the third sand mold (3) and the fourth sand mold (4) are respectively fixedly connected with inclined blocks (6). When the first sand mold (1) and the second sand mold (2) are attached, the first sand mold (1) is attached to the inclined block (6) on the second sand mold (2) with the inclined surface facing outward. When the third sand mold (3) and the fourth sand mold (4) are attached, the third sand mold (3) is attached to the inclined block (6) on the fourth sand mold (4) with the inclined surface facing outward. The inner cavity sand mold (5) is located inside the first sand mold (1), the second sand mold (2), the third sand mold (3) and the fourth sand mold (4).

2. The sand mold structure for gearbox casting according to claim 1, characterized in that, The inner cavity sand mold (5) is provided with a through-type air outlet channel (7).

3. The sand mold structure for gearbox casting according to claim 1, characterized in that, The second sand mold (2) and the third sand mold (3) are provided with feeding channels (8) on their opposite surfaces, and the pouring port is provided on the first sand mold (1).

4. A casting device for the sand mold structure described in any one of claims 1-3, comprising a base (9), characterized in that, The base (9) is symmetrically provided with through grooves (10), and each through groove (10) is slidably connected with a sliding rod (11). The bottoms of the two sliding rods (11) are driven to move towards each other or backwards by a drive assembly (12). The tops of the sliding rods (11) are fixedly connected with clamping assemblies (13) for clamping the first sand mold (1), the second sand mold (2), the third sand mold (3) and the fourth sand mold (4).

5. The casting equipment according to claim 4, characterized in that, The drive assembly (12) includes a motor (14) fixed to the side of the base (9), a screw (15) fixedly connected to the rotor of the motor (14), the screw (15) has symmetrical threads on the outer side, and the lower end of the sliding rod (11) is threadedly connected to the screw (15).

6. The casting equipment according to claim 4, characterized in that, The clamping assembly (13) includes a sliding rod (11) with an elastic telescopic rod (16) fixedly connected to the top. The elastic telescopic rod (16) is fixedly connected to a V-shaped clamping block (17) on the side facing the sand mold. The V-shaped clamping block (17) is movably clamped to the inclined block (6) on the same side.

7. The casting equipment according to claim 6, characterized in that, The outer ends of the sliding rod (11) are rotatably connected to an auxiliary clamping shaft (18), and both ends of the auxiliary clamping shaft (18) are fixedly connected to gears (19). A swing clamping rod (20) is fixedly connected to the outside of the gear (19). A rack (21) is provided on the base (9), and the rack (21) meshes with the gear (19).

8. The casting equipment according to claim 7, characterized in that, The rack (21) is slidably connected to the base (9), and a locking bolt (22) is threaded on the rack (21). When the locking bolt (22) passes through the rack (21) and is threadedly connected to the base (9), the rack (21) is locked.

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