Loader transmission case body casting lost foam

Abstract

The utility model relates to special foundry technical field discloses a loader gearbox body foundry lost foam, including the top cover, the bottom of top cover is provided with the main part, the bottom of top cover is close to the edge department fixedly connected with a plurality of positioning column no. In the utility model, the main part and the base are pasted together, which has the beneficial effect of modularizing and disassembling the lost foam, reduces the mold development cost, improves the production flexibility and efficiency, is convenient for maintenance and improves the practicality.

Description

Technical Field

[0001] This utility model relates to the field of special casting technology, and in particular to a lost foam casting method for loader gearbox housing. Background Technology

[0002] Special casting technology is a new type of casting method other than sand casting. It meets the special requirements of parts by changing the casting process. It covers a variety of process types such as investment casting, metal mold casting, pressure casting and lost foam casting. Lost foam casting has become an ideal process for manufacturing complex parts with uneven wall thickness, such as loader gearboxes, due to its advantages of high precision, no sand core and less machining allowance. It can significantly improve the quality of castings and production efficiency.

[0003] When high-precision, low-cost, and efficient production of loader gearbox housing castings with complex structures and uneven wall thicknesses is required, lost foam casting technology is necessary. Lost foam for gearbox housing casting refers to a foam plastic model specifically designed for loader gearbox housings using the lost foam casting process. It is particularly suitable for the efficient and precision casting of loader gearbox housings with complex structures, uneven wall thicknesses, and high sealing requirements. Most existing lost foam castings adopt an integral structure, which cannot be modularly disassembled, resulting in high mold development costs, low production flexibility and efficiency, difficulty in maintenance, and reduced practicality. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a lost foam casting method for loader gearbox housings, aiming to improve the problems of existing technologies, such as the inability to modularly disassemble molds, high mold development costs, low production flexibility and efficiency, and difficulty in maintenance.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a lost foam casting method for a loader gearbox body, comprising a top cover, a main body at the bottom of the top cover, a plurality of positioning posts 1 fixedly connected to the bottom of the top cover near the edge, a positioning hole 1 opened on the top of the outer wall of the main body, a connecting ring fixedly connected to the bottom of the main body, a connecting groove 1 opened on the rear side of the bottom of the outer wall of the connecting ring, a positioning post 2 fixedly connected to the inner wall of the connecting groove 1, a connecting groove 2 opened on the front side of the bottom of the outer wall of the connecting ring, a positioning disc 1 fixedly connected to the inner wall of the connecting groove 2, a positioning post 3 fixedly connected to the bottom of the connecting ring near the edge, a base at the bottom of the main body, a positioning disc 2 fixedly connected to the front top of the base, a connecting disc fixedly connected to the rear top of the base, a positioning hole 2 opened on the top of the outer wall of the connecting disc, a plurality of positioning holes 3 opened on the top of the outer wall of the base, and an integrated mechanism fixedly connected to the outer wall of the main body, the integrated mechanism being used for functional integration of the lost foam casting of the gearbox.

[0006] As a further description of the above technical solution:

[0007] The integrated mechanism includes a protruding interface, the front side of which is fixedly connected to the outer wall of the main body. The inner wall of the main body has a transmission cavity, the rear side of the inner wall of the transmission cavity is fixedly connected to a connecting seat, the right side of the inner wall of the transmission cavity is fixedly connected to a support plate, the middle of the inner wall of the transmission cavity has multiple shaft holes II, the top of the outer wall of the top cover has multiple shaft holes I, and the inner wall of the positioning plate I has an installation and maintenance port.

[0008] As a further description of the above technical solution:

[0009] The base is fixedly connected to a support plate at its bottom, and the support plate is fixedly connected to reinforcing ribs on its front and rear sides.

[0010] As a further description of the above technical solution:

[0011] The top left and right sides of the support plate are fixedly connected to arc-shaped support seats, and the bottom left and right sides of the support plate are fixedly connected to support feet.

[0012] As a further description of the above technical solution:

[0013] The inner wall of the top cover has a functional cavity, and an oil pipeline is fixedly connected to the top of the inner wall of the functional cavity.

[0014] As a further description of the above technical solution:

[0015] The middle part of the inner wall of the first connecting groove is slidably connected to the outer wall of the connecting disk, and the middle part of the inner wall of the second connecting groove is slidably connected to the middle part of the outer wall of the second positioning disk.

[0016] As a further description of the above technical solution:

[0017] The inner wall of the second positioning hole is slidably connected to the outer wall of the second positioning post, and the rear side of the outer wall of the second positioning disk is slidably connected to the front side of the outer wall of the first positioning disk.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the first positioning post is slidably connected to the inner wall of the first positioning hole, and the outer wall of the third positioning post is slidably connected to the inner wall of the third positioning hole.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, firstly, positioning pin one is aligned with positioning hole one and inserted, then positioning pin two is aligned with positioning hole two and inserted, and positioning pin three is aligned with positioning hole three and inserted. Therefore, the main body and the base fit together, and vice versa, they can be separated. This achieves the beneficial effect of modular disassembly of lost foam casting. Multi-module layered disassembly reduces mold development costs, improves production flexibility and efficiency, facilitates maintenance, and enhances practicality.

[0022] 2. In this utility model, by opening the shaft hole on the top of the outer wall of the top cover, and fixing the connecting seat and the protruding interface on the inside and outside of the transmission cavity respectively, these functional structures can be formed after casting. This achieves the beneficial effect of directly integrating the functional structure into the lost foam, eliminating the need for extensive subsequent processing, ensuring the coaxiality of the shaft system and the smoothness of the oil circuit, improving production efficiency, reducing assembly errors, and enhancing practicality. Attached Figure Description

[0023] Figure 1 This is a perspective view of the front side of the top cover of a lost foam casting of a loader gearbox body proposed in this utility model;

[0024] Figure 2 This is a partial structural breakdown diagram of the main body of a lost foam casting method for a loader gearbox body proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the main structure of a lost foam casting method for a loader gearbox body proposed in this utility model;

[0026] Figure 4 This is a partial structural diagram illustrating the lost foam casting method for a loader gearbox housing proposed in this utility model.

[0027] Figure 5 This is a partial structural diagram of the connecting ring in the lost foam casting of a loader gearbox body, as proposed in this utility model.

[0028] Legend:

[0029] 1. Top cover; 2. Integrated mechanism; 201. Shaft hole one; 202. Support plate; 203. Connecting seat; 204. Installation and maintenance port; 205. Shaft hole two; 206. Transmission cavity; 207. Protruding interface; 3. Main body; 4. Base; 5. Positioning post one; 6. Positioning hole one; 7. Connecting ring; 8. Positioning disc one; 9. Positioning disc two; 10. Connecting disc; 11. Positioning hole two; 12. Positioning hole three; 13. Positioning post two; 14. Connecting groove one; 15. Positioning post three; 16. Reinforcing rib; 17. Support disc; 18. Support foot; 19. Arc-shaped support seat; 20. Connecting groove two; 21. Functional cavity; 22. Oil pipeline. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 5 This utility model provides an embodiment of a lost foam casting for a loader gearbox body, including a top cover 1, a main body 3 at the bottom of the top cover 1, a plurality of positioning pins 5 fixedly connected to the bottom of the top cover 1 near the edge, a positioning hole 6 at the top of the outer wall of the main body 3, a connecting ring 7 fixedly connected to the bottom of the main body 3, a connecting groove 14 at the rear side of the bottom of the outer wall of the connecting ring 7, a positioning pin 13 fixedly connected to the inner wall of the connecting groove 14, a connecting groove 20 at the front side of the bottom of the outer wall of the connecting ring 7, a positioning disc 8 fixedly connected to the inner wall of the connecting groove 20, a positioning pin 15 fixedly connected to the bottom of the connecting ring 7 near the edge, a base 4 at the bottom of the main body 3, a positioning disc 9 fixedly connected to the front top of the base 4, a connecting disc 10 fixedly connected to the rear top of the base 4, a positioning hole 11 at the top of the outer wall of the connecting disc 10, a plurality of positioning holes 12 at the top of the outer wall of the base 4, and an integrated mechanism 2 fixedly connected to the outer wall of the main body 3. The integrated mechanism 2 is used for functional integration of the lost foam casting of the gearbox.

[0032] Specifically, multiple positioning pins 5 are fixedly connected to the bottom edge of the top cover 1, and positioning holes 6 are correspondingly opened on the top of the outer wall of the main body 3. During assembly, the positioning pins 5 are accurately aligned with the positioning holes 6 and inserted to ensure accurate horizontal alignment between the top cover 1 and the main body 3, preventing relative displacement during casting and ensuring the dimensional accuracy of the casting. A connecting ring 7 is fixedly connected to the bottom of the main body 3, which plays a transitional role in the entire connection structure. A connecting groove 14 is opened on the rear side of the bottom of the outer wall of the connecting ring 7, and a positioning pin 13 is fixedly connected to the inner wall of the connecting groove 14. A connecting groove 20 is opened on the front side of the bottom of the outer wall, and a positioning disc 8 is fixedly connected to the inner wall of the connecting groove 20. At the same time, a positioning plate 8 is also fixedly connected to the bottom edge of the connecting ring 7. A positioning post 15 is fixedly connected. A positioning disc 9 is fixedly connected to the front top of the base 4, and a connecting disc 10 is fixedly connected to the rear top. A positioning hole 11 is opened on the top of the outer wall of the connecting disc 10. Multiple positioning holes 12 are opened on the top of the outer wall of the base 4. When connecting the main body 3 and the base 4, the positioning post 13 is first inserted into the positioning hole 11, so that the connecting groove 14 fits tightly with the connecting disc 10. Then, the positioning post 15 is inserted into the positioning hole 12, while ensuring that the positioning disc 9 fits accurately with the connecting groove 20 and the positioning disc 8. Finally, the connecting ring 7 fits tightly with the base 4. Since the connecting ring 7 is fixed at the bottom of the main body 3, a stable connection between the main body 3 and the base 4 is achieved, thus making the top cover 1, the main body 3 and the base 4 a whole.

[0033] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 The integrated mechanism 2 includes a protruding interface 207. The front side of the protruding interface 207 is fixedly connected to the outer wall of the main body 3. The inner wall of the main body 3 has a transmission cavity 206. The rear side of the inner wall of the transmission cavity 206 is fixedly connected to a connecting seat 203. The right side of the inner wall of the transmission cavity 206 is fixedly connected to a support plate 202. The middle part of the inner wall of the transmission cavity 206 has multiple shaft holes 205. The top of the outer wall of the top cover 1 has multiple shaft holes 201. The inner wall of the positioning plate 8 has an installation and maintenance port 204.

[0034] Specifically, the protruding interface 207 acts like a sturdy bridge, tightly connecting the main body 3 to other external components. A transmission cavity 206 is formed on the inner wall of the main body 3. The transmission cavity 206 reduces frictional loss during power transmission and improves transmission efficiency. A connecting seat 203 is fixedly connected to the rear side of the inner wall of the transmission cavity 206. The connecting seat 203 stably supports various transmission components within the transmission cavity 206, ensuring that the transmission components do not shake or shift during operation. A support plate 202 is fixedly connected to the right side of the inner wall of the transmission cavity 206. The support plate 202 enhances the overall structural stability of the transmission cavity 206. Multiple shaft holes 205 are provided in the middle of the wall. These shaft holes 205 are the installation positions of the power shaft system. During the casting process, the surface quality of the shaft holes 205 is strictly controlled to ensure that its smoothness and roundness meet the requirements, thereby reducing the friction and wear of the power shaft during operation. In addition to the shaft holes 205 on the main body 3, multiple shaft holes 201 are also provided on the top of the outer wall of the top cover 1. The shaft holes 201 correspond to the shaft holes 205 and together form a complete power shaft system installation channel. The inner wall of the positioning plate 8 is provided with an installation and maintenance port 204. This installation and maintenance port 204 provides great convenience for the installation and subsequent maintenance of the gearbox.

[0035] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 4 The bottom of the base 4 is fixedly connected to a support plate 17. The top front and rear sides of the support plate 17 are fixedly connected to reinforcing ribs 16. The top left and right sides of the support plate 17 are fixedly connected to arc-shaped support seats 19. The bottom left and right sides of the support plate 17 are fixedly connected to support feet 18. The inner wall of the top cover 1 is provided with a functional cavity 21. The top of the inner wall of the functional cavity 21 is fixedly connected to an oil pipeline 22.

[0036] Specifically, the support plate 17 serves as a support and installation unit, the reinforcing rib 16 is used to strengthen the fixation, the arc-shaped support seat 19 provides further support, the support foot 18 is used to support the support plate 17, the functional cavity 21 is used to provide space, and the oil pipeline 22 is used for lubrication.

[0037] Please see the appendix Figure 2 Appendix Figure 3 and attached Figure 4 The inner wall of connecting groove 14 is slidably connected to the outer wall of connecting plate 10; the inner wall of connecting groove 20 is slidably connected to the outer wall of positioning plate 29; the inner wall of positioning hole 21 is slidably connected to the outer wall of positioning post 23; the rear side of the outer wall of positioning plate 29 is slidably connected to the front side of the outer wall of positioning plate 18; the outer wall of positioning post 15 is slidably connected to the inner wall of positioning hole 16; and the outer wall of positioning post 315 is slidably connected to the inner wall of positioning hole 312.

[0038] Specifically, the connecting plate 10 can slide in the connecting groove 14, the positioning plate 29 can slide in the connecting groove 20, the positioning pin 23 can slide in the positioning hole 21, the positioning plate 18 and the positioning plate 29 can slide together, the positioning pin 15 can slide in the positioning hole 16, and the positioning pin 35 can slide in the positioning hole 312.

[0039] Working principle: First, align the positioning pin 5 with the positioning hole 6 and insert it, so that the top cover 1 and the main body 3 fit together. Then, align the positioning pin 13 with the positioning hole 11 and insert it, and align the positioning pin 15 with the positioning hole 12, so that the connecting groove 14 fits with the connecting plate 10. At the same time, the positioning plate 9 fits with the connecting groove 20 and the positioning plate 8, so that the connecting ring 7 fits with the base 4. Since the connecting ring 7 is fixed at the bottom of the main body 3, the main body 3 and the base 4 fit together, so that the top cover 1 and the base 4 are also integrated. Conversely, they can also be separated, thus playing the role of modular disassembly of lost foam. Multi-module layered disassembly reduces mold development costs, improves production flexibility and efficiency, facilitates maintenance, and improves practicality.

[0040] By opening shaft hole 1 201 on the top of the outer wall of top cover 1 and shaft hole 205 in the main body 3, and fixing connecting seat 203 and protruding interface 207 to the inside and outside of transmission cavity 206 respectively, connecting seat 203 and protruding interface 207 are also fixedly connected together, and support plate 202 is fixed on the right side of inner wall of transmission cavity 206, these functional structures can be formed after casting, thus playing the role of directly integrating functional structures into lost foam, without the need for a lot of subsequent processing, ensuring the coaxiality of shaft system and the smoothness of oil circuit, improving production efficiency, reducing assembly errors, and improving practicality.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lost foam casting method for a loader gearbox body, comprising a top cover (1), characterized in that: The bottom of the top cover (1) is provided with a main body (3). A plurality of positioning posts (5) are fixedly connected to the bottom of the top cover (1) near the edge. A positioning hole (6) is opened on the top of the outer wall of the main body (3). A connecting ring (7) is fixedly connected to the bottom of the main body (3). A connecting groove (14) is opened on the rear side of the bottom of the outer wall of the connecting ring (7). A positioning post (13) is fixedly connected to the inner wall of the connecting groove (14). A connecting groove (20) is opened on the front side of the bottom of the outer wall of the connecting ring (7). A positioning disc (8) is fixedly connected to the inner wall of the connecting groove (20). The bottom of the connecting ring (7) is fixedly connected to a positioning post three (15) near the edge. The bottom of the main body (3) is provided with a base (4). The top front side of the base (4) is fixedly connected to a positioning disk two (9). The top rear side of the base (4) is fixedly connected to a connecting disk (10). The top of the outer wall of the connecting disk (10) is provided with a positioning hole two (11). The top of the outer wall of the base (4) is provided with multiple positioning holes three (12). The outer wall of the main body (3) is fixedly connected to an integration mechanism (2). The integration mechanism (2) is used for functional integration of the lost foam of the gearbox.

2. The lost foam casting method for a loader gearbox body according to claim 1, characterized in that: The integrated mechanism (2) includes a protruding interface (207), the front side of which is fixedly connected to the outer wall of the main body (3), the inner wall of the main body (3) is provided with a transmission cavity (206), the rear side of the inner wall of the transmission cavity (206) is fixedly connected with a connecting seat (203), the right side of the inner wall of the transmission cavity (206) is fixedly connected with a support plate (202), the middle part of the inner wall of the transmission cavity (206) is provided with multiple shaft holes (205), the top of the outer wall of the top cover (1) is provided with multiple shaft holes (201), and the inner wall of the positioning plate (8) is provided with an installation and maintenance port (204).

3. The lost foam casting method for a loader gearbox body according to claim 1, characterized in that: The bottom of the base (4) is fixedly connected to a support plate (17), and the front and rear sides of the top of the support plate (17) are fixedly connected to reinforcing ribs (16).

4. The lost foam casting method for a loader gearbox body according to claim 3, characterized in that: The top left and right sides of the support plate (17) are fixedly connected with arc-shaped support seats (19), and the bottom left and right sides of the support plate (17) are fixedly connected with support feet (18).

5. The lost foam casting method for a loader gearbox body according to claim 1, characterized in that: The inner wall of the top cover (1) is provided with a functional cavity (21), and an oil pipeline (22) is fixedly connected to the top of the inner wall of the functional cavity (21).

6. The lost foam casting method for a loader gearbox body according to claim 1, characterized in that: The middle part of the inner wall of the first connecting groove (14) is slidably connected to the outer wall of the connecting disk (10), and the middle part of the inner wall of the second connecting groove (20) is slidably connected to the middle part of the outer wall of the second positioning disk (9).

7. The lost foam casting method for a loader gearbox body according to claim 1, characterized in that: The inner wall of the second positioning hole (11) is slidably connected to the outer wall of the second positioning post (13), and the rear side of the outer wall of the second positioning disk (9) is slidably connected to the front side of the outer wall of the first positioning disk (8).

8. The lost foam casting method for a loader gearbox body according to claim 1, characterized in that: The outer wall of the first positioning post (5) is slidably connected to the inner wall of the first positioning hole (6), and the outer wall of the third positioning post (15) is slidably connected to the inner wall of the third positioning hole (12).

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