Die casting mold for gear box

Abstract

This utility model discloses a die-casting mold for gearboxes, comprising an upper mold, an intermediate template, and a lower mold connected sequentially in a vertical direction. The top of the lower mold has a forming groove extending through to the top wall of the intermediate template. The bottom of the upper mold is connected to a core inserted into the forming groove. A forming cavity is formed between the outer peripheral wall of the core and the inner peripheral wall of the forming groove. The top wall of the lower mold has several sliding grooves extending through its side walls and the cavity. The bottom wall of the intermediate template has clearance grooves vertically opposite to the sliding grooves. A forming module is movably disposed within the sliding grooves and clearance grooves. The upper mold is provided with a limiting member that passes through the intermediate template to position the forming module. This utility model allows for rapid demolding by simply separating the upper mold, lower mold, and intermediate template, and then sliding the forming module. This avoids damage such as pressure marks and scratches on the surface of the gearbox product, preventing defective products. The demolding process is streamlined, with high efficiency, which helps improve product production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically a die-casting mold for gearboxes. Background Technology

[0002] Gearboxes have a wide range of applications and are an important mechanical component in industrial equipment transmission systems, office automation and smart home systems, and vehicle transmission systems. In gearbox production, die casting molds are typically used for manufacturing and processing. Die casting reduces defective products generated during production, ensuring product quality.

[0003] In existing gearbox casting processes, to prevent gearbox deformation during manufacturing, gearbox molds are designed to be overly complex, with tight interlocking between parts. This results in the die-cast gearbox workpiece being too tightly locked to the mold, making demolding difficult. Especially for gearboxes with slots and undercuts, auxiliary tools are needed to remove the gearbox from the die-casting mold after die casting, such as by hammering. However, this not only damages the workpiece surface and affects the production quality, but also leads to a decrease in production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a die-casting mold for gearboxes, which eliminates the need for hammering or prying out gearbox products during the entire process, thus avoiding damage or scratches to the surface of the gearbox products and preventing the production of defective products. Its structure is simple, with fewer demolding steps and high demolding efficiency, which helps to improve product production efficiency and solves the problem mentioned in the background art that existing gearbox molds are prone to causing damage to the workpiece surface and have unsatisfactory production efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A die-casting mold for a gearbox includes an upper mold, an intermediate template, and a lower mold connected in sequence along a vertical direction. The top of the lower mold has a forming groove extending through to the top wall of the intermediate template. The bottom of the upper mold is connected to a core inserted into the forming groove. A forming cavity is formed between the outer peripheral wall of the core and the inner peripheral wall of the forming groove. The top wall of the lower mold has several sliding grooves extending through its side walls and the cavity. The bottom wall of the intermediate template has clearance grooves that are vertically opposite to the sliding grooves. A forming module is movably disposed within the sliding grooves and clearance grooves. The upper mold is provided with a limiting member that passes through the intermediate template to position the forming module.

[0007] Preferably, the plurality of grooves are distributed in a circumferential manner on the top wall of the lower mold. Each groove includes a first groove segment and a second groove segment connected to the first groove segment. One end of the first groove segment extends through to the side wall of the lower mold, and the end of the second groove segment away from the first groove segment extends through to the forming groove.

[0008] Preferably, the bottom wall of the second groove section has an upwardly protruding first column.

[0009] Preferably, the molding module includes a slide block movably disposed in a slide groove and a slider movably disposed in a clearance groove, wherein the bottom end of the slider is connected to the slide block.

[0010] Preferably, the slide includes a main body located in a first groove segment and a molding part located in a second groove segment and connected to the main body, wherein one end of the molding part extending into the molding groove forms an axially extending second protrusion.

[0011] Preferably, the clearance groove is provided with a corresponding receiving groove at one end near the forming groove, and the forming module includes inserts respectively installed in the receiving groove, the sidewalls of the inserts having protrusions.

[0012] Preferably, the insert has a guide groove on the side facing away from the protrusion, and the slider sidewall has a guide rail adapted to fit in the guide groove.

[0013] Preferably, the upper mold includes template A and template B sleeved on the outer periphery of template A, and a plurality of the limiting members are arranged along the circumferential direction on the bottom wall of template B.

[0014] Preferably, the top wall of the clearance groove is provided with a limiting hole that extends through to the top wall of the intermediate template, the top surface of the main body is provided with a limiting groove, and the bottom end of the limiting member passes through the limiting hole and the clearance groove in sequence and is inserted into the limiting groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are: during the demolding process, only the upper mold, lower mold and intermediate template need to be separated, and then the forming module can be moved to quickly complete the demolding. The mold structure is simple, the demolding steps are few, and the demolding efficiency is high, which helps to improve the production efficiency of the product; the entire demolding process does not require knocking or prying out the gearbox product, which can avoid causing pressure or scratches on the surface of the gearbox product, thus preventing the production of defective products. Attached Figure Description

[0016] Figure 1 This is a first-view perspective perspective view of the gearbox of this utility model;

[0017] Figure 2 This is a perspective view of the gearbox of this utility model from a second angle.

[0018] Figure 3 This is a perspective view of a die-casting mold for a gearbox according to the present invention;

[0019] Figure 4 This is a cross-sectional view of a die-casting mold for a gearbox according to the present invention;

[0020] Figure 5This is an exploded view of a die-casting mold for a gearbox according to the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the intermediate template and the forming module of this utility model;

[0022] Figure 7 This is an exploded view of the intermediate template and the forming module of this utility model;

[0023] Figure 8 This is a perspective view of the lower mold of this utility model;

[0024] Figure 9 This is a cross-sectional view of the gearbox demolding process of this utility model.

[0025] In the diagram: 1. Shell; 11. Protrusion; 111. Slot; 112. Vertical groove; 12. Clamping groove; 2. Upper mold; 21. Template A; 22. Template B; 3. Intermediate template; 31. Clearance groove; 32. Receiving groove; 33. Limiting hole; 4. Lower mold; 41. Forming groove; 42. Sliding groove; 421. First groove segment; 422. Second groove segment; 43. First protrusion; 5. Core; 6. Forming module; 61. Slide block; 611. Main body; 612. Forming part; 613. Second protrusion; 614. Mounting groove; 615. Limiting groove; 62. Slider; 621. Guide rail; 63. Insert; 631. Protrusion; 632. Guide groove; 7. Limiting component. Detailed Implementation

[0026] 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.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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" and "second" 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, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "more than" means two or more, unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.

[0028] Please see Figure 3-9 A die-casting mold for gearboxes, used for die-casting and demolding of gearboxes, includes an upper mold 2, an intermediate template 3, and a lower mold 4 connected sequentially in a vertical direction. The lower mold 4 has a forming groove 41 extending through to the top wall of the intermediate template 3. (See also...) Figure 4-5 The bottom end of the upper mold 2 is connected to a core 5 inserted into the forming groove 41. The outer peripheral wall of the core 5 and the inner peripheral wall of the forming groove 41 form a forming cavity, and the gearbox is die-cast within the cavity. The top wall of the lower mold 4 has several sliding grooves 42 that extend to its side walls and the cavity. Please refer to [reference needed]. Figure 4 as well as Figure 6 The bottom wall of the intermediate template 3 is provided with a clearance groove 31 that is vertically opposite to the slide groove 42. A forming module 6 is movably disposed within the slide groove 42 and the clearance groove 31. In this embodiment, the forming module 6 is used in conjunction with cavity die casting to form the gearbox. The upper mold 2 is provided with a limiting member 7 that passes through the intermediate template 3 to position the forming module 6.

[0029] like Figure 1 and Figure 2As shown, the gearbox formed in the cavity includes a hollow shell 1. The outer wall of the shell 1 has a plurality of protrusions 11 and clamping grooves 12 located above the corresponding protrusions 11. The protrusions 11 have horizontal slots 111 and vertical grooves 112, and the vertical grooves 112 are connected to the slots 111.

[0030] Please see Figure 3 as well as Figure 9 After the gearbox is die-cast in the molding cavity, the upper mold 2 moves upward relative to the intermediate template 3, so that the core 5 is extracted from the cavity of the housing 1. At the same time, the limiting member 7 releases the positioning of the molding module 6. Simultaneously, the lower mold 4 moves downward relative to the intermediate template 3, so that the molding groove 41 separates from the lower part of the housing 1, and most importantly, separates the lower mold 4 from the vertical groove 112 of the housing 1. Then, the molding module 6 is translated in the sliding groove 42 in the direction away from the cavity, so that the molding module 6 separates from the housing 1, and most importantly, separates the molding module 6 from the housing 1. The slot 111 separates, thus completing the demolding process; finally, the gearbox housing 1 is pushed upward from the middle template 3 to remove the gearbox product; the entire process does not require knocking or prying out the gearbox product, which can avoid causing pressure or scratches on the surface of the gearbox product and prevent the production of defective products; during the entire demolding process, due to the simple mold structure, it is only necessary to separate the upper mold 2, lower mold 4 and middle template 3, and then move the forming module 6 to quickly complete the demolding. The demolding steps are few and the demolding efficiency is high, which helps to improve the product production efficiency.

[0031] In this embodiment, the forming module 6 can be moved manually or by a power device. For example, the power device can be set on the side wall of the middle template 3. The power device is a cylinder. One end of the telescopic rod of the cylinder is connected to the forming module 6 and is used to drive the forming module 6 to move within the slide groove 42. The cylinder adopts existing mature technology, and its structural principle will not be described in detail here.

[0032] Please see Figure 8 Several grooves 42 are distributed in a circumferential manner on the top wall of the lower mold 4. Each groove 42 includes a first groove segment 421 and a second groove segment 422 connected to the first groove segment 421. One end of the first groove segment 421 extends to the side wall of the lower mold 4, and the end of the second groove segment 422 away from the first groove segment 421 extends to the forming groove 41. The width of the first groove segment 421 is wider than the width of the second groove segment 422.

[0033] In this embodiment, the bottom wall of the second groove section 422 has an upwardly protruding first protrusion 43, which cooperates with the cavity die casting to form the vertical groove 112 of the shell 1. When the lower mold 4 moves down relative to the intermediate mold plate 3, the first protrusion 43 separates from the vertical groove 112 of the shell 1, thereby completing the partial demolding of the shell 1; in this embodiment, there are three grooves 42.

[0034] Please see Figure 4-7 The molding module 6 includes a slide block 61 movably disposed within a slide groove 42 and a slider 62 movably disposed within a clearance groove 31, the bottom end of which is connected to the slide block 61. The slide block 61 includes a main body 611 located within a first groove segment 421 and a molding part 612 located within a second groove segment 422 and connected to the main body 611. (See also...) Figure 6 The molding part 612 extends into the molding groove 41 and forms an axially extending second protrusion 613 at one end. The second protrusion 613 cooperates with the cavity die casting to form the slot 111 of the housing 1. The top surface of the main body 611 is provided with a mounting groove 614, and the bottom end of the slider 62 is inserted into the mounting groove 614.

[0035] Please see Figure 6-7 The clearance groove 31 has a corresponding receiving groove 32 at one end near the forming groove 41. The forming module 6 includes inserts 63 respectively installed in the receiving grooves 32. The sidewalls of the inserts 63 are formed with protrusions 631, which cooperate with the die casting of the cavity to form the clamping groove 12 of the housing 1. Please refer to Figure 5 as well as Figure 7 The insert 63 has a guide groove 632 on the side opposite to the protrusion 631. The side wall of the slider 62 has a guide rail 621 that fits into the guide groove 632. The guide rail 621 and the guide groove 632 have a positioning function. Through the cooperation of the guide rail 621 and the guide groove 632, the slider 62 moves stably relative to the insert 63.

[0036] Please see Figure 9 After the lower mold 4 moves down relative to the middle template 3, the slide block 61 and the slider 62 move in the direction of the arrow in the figure. The slider 62 moves relative to the insert 63 to the side of the relief groove 31. The relief groove 31 provides space for the slider 62 to move. At the same time, the second protrusion 613 at the end of the molding part 612 separates from the slot 111 of the housing 1, thereby completing the complete demolding of the housing 1.

[0037] Please see Figure 5 as well as Figure 9 The upper mold 2 includes an A template 21 and a B template 22 fitted around the outer periphery of the A template 21. Several limiting members 7 are arranged circumferentially on the bottom wall of the B template 22. The core 5 is connected to the bottom wall of the A template 21. In this embodiment, the number of limiting members 7 is three. A limiting hole 33 penetrating to the top wall of the intermediate template 3 is provided on the top wall of the clearance groove 31. Please refer to [link / reference]. Figure 7 The top surface of the main body 611 is provided with a limiting groove 615. The bottom end of the limiting member 7 passes through the limiting hole 33 and the clearance groove 31 in sequence and is inserted into the limiting groove 615 to position the slide 61 and prevent the slide 61 from moving during the die casting process, which would cause molding defects in the gearbox product.

[0038] In this embodiment, the bottom end of the limiting member 7 is a boss-shaped part that matches the limiting groove 615, facilitating the axial insertion of the limiting member 7 into the limiting groove 615. During the upward movement of the upper mold 2 relative to the intermediate template 3, the upper mold 2 drives the limiting member 7 to move upward, thereby separating the limiting member 7 from the slide block 61, thus releasing the positioning of the slide block 61, facilitating the subsequent translational sliding of the slide block 61 relative to the product, and making it easier to demold the product.

[0039] Please see Figure 4 The die-casting mold for gearboxes includes a central channel (not shown in the figure) that runs through the upper mold 2, the core 5 and the lower mold 4. The central channel can serve as a cooling channel to cool the product, reduce demolding time and speed up production efficiency.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold for a gearbox, characterized in that: The system includes an upper mold (2), an intermediate template (3), and a lower mold (4) connected in sequence along the vertical direction. The lower mold (4) has a forming groove (41) that extends through to the top wall of the intermediate template (3). The bottom end of the upper mold (2) is connected to a core (5) inserted into the forming groove (41). The outer peripheral wall of the core (5) and the inner peripheral wall of the forming groove (41) form a forming cavity. The top wall of the lower mold (4) has several sliding grooves (42) that extend through its side walls and the cavity. The bottom wall of the intermediate template (3) has clearance grooves (31) that are vertically opposite to the sliding grooves (42). A forming module (6) is movably arranged in the sliding grooves (42) and clearance grooves (31). The upper mold (2) is provided with a limiting member (7) that passes through the intermediate template (3) to position the forming module (6).

2. The die-casting mold for gearboxes according to claim 1, characterized in that: Several grooves (42) are distributed in a circumferential manner on the top wall of the lower mold (4). Each groove (42) includes a first groove segment (421) and a second groove segment (422) connected to the first groove segment (421). One end of the first groove segment (421) extends to the side wall of the lower mold (4), and the other end of the second groove segment (422) away from the first groove segment (421) extends to the forming groove (41).

3. The die-casting mold for gearboxes according to claim 2, characterized in that: The bottom wall of the second groove section (422) has an upwardly protruding first protrusion (43).

4. The die-casting mold for gearboxes according to claim 2, characterized in that: The molding module (6) includes a slide block (61) movably disposed in a slide groove (42) and a slider (62) movably disposed in a clearance groove (31), the bottom end of the slider (62) being connected to the slide block (61).

5. The die-casting mold for gearboxes according to claim 4, characterized in that: The slide (61) includes a main body (611) located in a first groove (421) and a molding part (612) located in a second groove (422) and connected to the main body (611). The molding part (612) extends into the molding groove (41) and has an axially extending second protrusion (613) at one end.

6. The die-casting mold for gearboxes according to claim 5, characterized in that: The clearance groove (31) is provided with a corresponding receiving groove (32) at one end near the forming groove (41). The forming module (6) includes inserts (63) installed in the receiving grooves (32) respectively. The sidewall of the insert (63) is formed with a protrusion (631).

7. The die-casting mold for gearboxes according to claim 6, characterized in that: The insert (63) has a guide groove (632) on the side facing away from the protrusion (631), and the sidewall of the slider (62) has a guide rail (621) adapted to fit in the guide groove (632).

8. The die-casting mold for gearboxes according to any one of claims 5-7, characterized in that: The upper mold (2) includes an A template (21) and a B template (22) fitted around the outer periphery of the A template (21). Several limiting members (7) are arranged along the circumferential direction on the bottom wall of the B template (22).

9. The die-casting mold for gearboxes according to claim 8, characterized in that: The top wall of the clearance groove (31) is provided with a limiting hole (33) that extends through to the top wall of the intermediate template (3). The top surface of the main body (611) is provided with a limiting groove (615). The bottom end of the limiting member (7) passes through the limiting hole (33) and the clearance groove (31) in sequence and is inserted into the limiting groove (615).

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