A die-casting mold structure for a motor front bracket

Abstract

This utility model discloses a die-casting mold structure for a motor front bracket, relating to the field of die-casting mold technology. It includes an upper mold plate, a lower mold plate, an upper mold core, and a lower mold core, with the upper and lower mold cores respectively fixed to the upper and lower mold plates. The upper surface of the lower mold core has several first forming cavities, and the lower surface of the upper mold core has corresponding second forming cavities, which are connected to form a forming mold cavity. A first connecting space is provided on one side of the first forming cavities in the lower mold core, and a second connecting space is provided at a corresponding position on the upper mold core, with the second connecting space communicating with the second forming cavity. The first forming cavity has a vertically penetrating installation space, within which a detachable connecting shaft post extends upwards and fits against the top surface of the second forming cavity. A liquid flow channel is provided between the upper and lower mold cores, connecting the first and second connecting spaces and the liquid inlet. This structure, through the detachable shaft post, enables the production of front brackets with different shaft hole sizes, improving the mold's versatility and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, and in particular to a die-casting mold structure for a motor front bracket. Background Technology

[0002] In the field of motor manufacturing, the front bracket, as a key supporting component of the motor, directly affects the overall assembly performance and operational stability of the motor due to its structural precision and molding quality. The front bracket is typically formed using a die-casting process, and the rational design of the die-casting mold is a core factor in ensuring the production efficiency and product consistency of the front bracket.

[0003] In the existing technology, the die-casting mold for the motor front bracket generally adopts an integrated structure design. In particular, for the shaft hole on the front bracket used to install the rotating shaft, a protrusion (i.e., shaft hole forming core) that is integrated with the mold body is usually set in the corresponding position inside the mold. Through the cooperation of the protrusion and the mold cavity, the front bracket product with the shaft hole is die-cast in one step.

[0004] However, this integrated structure, which fixes the shaft hole forming protrusion to the mold body, reveals significant limitations in actual production; product versatility is low. Specifically, in scenarios involving serialized motor production or customer customization, the overall dimensions of the front bracket often remain unchanged, but the shaft hole size needs to be adjusted according to the specifications of the matching rotating shaft (e.g., changes in the diameter, depth, or stepped structure of the shaft hole). In this case, because the existing mold's shaft hole forming protrusion is an inseparable integrated structure with the mold body, the size of the protrusion cannot be individually modified or replaced. To produce front brackets with different shaft hole sizes, the entire die-casting mold must be redesigned and manufactured. This not only significantly increases the mold manufacturing cost but also extends the product development cycle, reduces production flexibility, and makes it difficult to meet the rapid response requirements of multi-variety, small-batch production in modern manufacturing. Therefore, further improvement is needed. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a die-casting mold structure for a motor front bracket.

[0006] A die-casting mold structure for a motor front bracket designed for this purpose includes an upper mold plate, a lower mold plate, an upper mold core, and a lower mold core. The upper mold core is fixedly mounted on the upper mold plate, and the lower mold core is fixedly mounted on the lower mold plate. A plurality of first forming cavities are arranged on the upper surface of the lower mold core. A plurality of second forming cavities corresponding to the first forming cavities are arranged on the lower surface of the upper mold core. The corresponding first and second forming cavities are interconnected to form a forming mold cavity. A downwardly recessed first connecting space is provided on the upper surface of the lower mold core on one side of the first forming cavity, and an upwardly recessed second connecting space is provided on the lower surface of the upper mold core corresponding to the first connecting space. The second connecting space is interconnected with the second forming cavity. A vertically penetrating installation space is provided within the first forming cavity, and a shaft is detachably connected to the installation space. The shaft extends upward and fits against the top surface of the second forming cavity. A liquid flow channel is provided between the upper mold core and the lower mold core, communicating with the first and second connecting spaces. The liquid flow channel is interconnected with a liquid inlet.

[0007] Preferably, the liquid flow channel includes a main flow channel and several branch flow channels that are interconnected with the main flow channel, wherein the end of each branch flow channel away from the main flow channel is connected to the first connecting space and the second connecting space.

[0008] Preferably, two adjacent first connected spaces and two adjacent second connected spaces are interconnected with the same branch channel.

[0009] Preferably, a recessed waste space is provided on the lower mold core on one side of the first molding cavity.

[0010] Preferably, the waste space is connected to an exhaust channel.

[0011] Preferably, the liquid inlet is located on the upper template.

[0012] Preferably, the lower template is provided with an upper opening mounting cavity, and the lower mold core is detachably installed in the mounting cavity.

[0013] Preferably, the mounting space is a mounting hole that is larger at the bottom and smaller at the top, and the shape of the shaft is consistent with the mounting hole and is movably inserted into the mounting space from bottom to top;

[0014] When the lower mold core is fixed in the mounting cavity, the bottom surface of the shaft is in contact with the inner bottom surface of the mounting cavity.

[0015] Preferably, the lower template is provided with a plurality of ejector pins that move up and down relative to the lower template, and the first molding cavity is provided with a plurality of ejector pin holes, the ejector pins being movably disposed within the ejector pin holes.

[0016] Compared with the prior art, the beneficial effects of this die-casting mold structure are significant, mainly reflected in the following aspects:

[0017] Firstly, by setting a detachable shaft column within the installation space of the first molding cavity, flexible separation of the shaft column from the mold body is achieved. When it is necessary to produce motor front brackets with different shaft hole sizes, it is not necessary to replace the entire mold set; only the corresponding specification shaft column needs to be replaced according to the requirements. This greatly improves the mold's versatility and adaptability, and effectively reduces the mold manufacturing cost and development cycle caused by product specification adjustments.

[0018] Secondly, the upper and lower mold cores are respectively equipped with corresponding first and second molding cavities. With the shaft extending upwards to fit against the top surface of the second molding cavity, the overall structure and shaft hole of the front support can be precisely molded, ensuring the dimensional accuracy and molding quality of the product. Simultaneously, the liquid flow channels are connected to the molding cavity through the first and second connecting spaces, ensuring that the die-casting liquid can smoothly and evenly fill all parts of the mold cavity, further improving the molding effect and consistency of the product.

[0019] Thirdly, the overall structure is compact and reasonable, and the connection of each component is stable and reliable. It not only meets the needs of efficient die-casting production, but also enhances production flexibility through the design of detachable shaft columns. It can quickly respond to the production needs of multiple varieties and small batches, and provides strong support for the large-scale and customized production of motor front brackets. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is an exploded structural diagram of the present invention;

[0022] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the lower mold core;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the upper mold core. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] See Figures 1-5A die-casting mold structure for a front bracket of an electric motor includes an upper mold plate 10, a lower mold plate 20, an upper mold core 30, and a lower mold core 40; the upper mold core 30 is fixedly disposed on the upper mold plate 10, and the lower mold core 40 is fixedly disposed on the lower mold plate 20.

[0027] The upper surface of the lower mold core 40 is provided with a plurality of first molding cavities 410; the lower surface of the upper mold core 30 is provided with a plurality of second molding cavities 310 corresponding to the first molding cavities 410.

[0028] The first molding cavity 410 and the second molding cavity 310, which are corresponding to each other, are interconnected to form a molding cavity 50;

[0029] A first communicating space 420 with a downward indentation is provided on the upper surface of the lower mold core 40 on one side of the first molding cavity 410, and a second communicating space 320 with an upward indentation is provided on the lower surface of the upper mold core 30 corresponding to the position of the first communicating space 420; the second communicating space 320 is connected to the second molding cavity 310.

[0030] The first molding cavity 410 is provided with a vertically penetrating installation space 400, and the installation space 400 is detachably connected to a shaft post 60; the shaft post 60 extends upward and is fitted to the top surface of the second molding cavity 310.

[0031] A liquid flow channel is provided between the upper mold core 30 and the lower mold core 40, which is connected to the first communicating space 420 and the second communicating space 320; the liquid flow channel is connected to the liquid inlet 100.

[0032] The working principle of this die-casting mold structure is as follows:

[0033] During operation, firstly, based on the shaft hole size of the front bracket of the motor to be produced, select the corresponding specification shaft column 60 and detachably install it in the installation space 400 within the first forming cavity 410 of the lower mold core 40 to form a shaft hole forming structure.

[0034] After the mold is closed, the upper mold plate 10 drives the upper mold core 30 to fit tightly against the lower mold core 40 on the lower mold plate 20. At this time, the corresponding first molding cavity 410 and second molding cavity 310 together form a closed molding cavity 50. At this time, the upper end of the shaft 60 extends to fit against the top surface of the second molding cavity 310 of the upper mold core 30; at the same time, the first connecting space 420 of the lower mold core 40 and the second connecting space 320 of the upper mold core 30 are connected to form a transition channel, and form a complete die casting liquid delivery path through the liquid flow channel and the liquid inlet 100.

[0035] During the die casting process, molten die casting liquid is injected from the inlet 100, flows through the liquid channel into the first connecting space 420 and the second connecting space 320 in sequence, and finally fills the molding cavity 50 evenly. After the die casting liquid cools and solidifies, the upper mold core 30 rises with the upper mold plate 10 when the mold is opened, and the formed motor front bracket remains in the first molding cavity 410 of the lower mold core 40. The front bracket product with the shaft hole can be demolded by removing the shaft post 60.

[0036] When it is necessary to produce products with different shaft hole sizes, it is only necessary to disassemble and replace the corresponding specification shaft post 60, without adjusting other structures of the mold, to achieve rapid changeover production.

[0037] See Figure 4 The liquid flow channel includes a main flow channel 440 and several branch flow channels 430 interconnected with the main flow channel 440. The branch flow channels 430, located away from the main flow channel 440, are connected to the first connecting space 420 and the second connecting space 320. The main flow channel and branch flow channels efficiently deliver the die-casting liquid from the inlet to each molding cavity. The main flow channel ensures a concentrated and stable supply of die-casting liquid, while the branch flow channels distribute the die-casting liquid to multiple first and second connecting spaces, ensuring uniform and timely filling of each molding cavity, improving product molding consistency and production efficiency.

[0038] See Figure 4 The two adjacent first connecting spaces 420 and the two adjacent second connecting spaces 320 are interconnected with the same branch flow channel 430. This design simplifies the flow channel structure and reduces material consumption and mold processing costs. At the same time, it ensures a balanced supply of die-casting liquid to the molding cavity on the same branch flow channel, further improving product consistency in multi-cavity production.

[0039] See Figure 4 A recessed waste space 450 is provided on the lower mold core 40 on one side of the first molding cavity 410. This design can accommodate excess die casting liquid during the die casting process, preventing excess liquid from overflowing and affecting the mold closing accuracy or product molding quality, while also facilitating the subsequent unified treatment of these excess materials.

[0040] See Figure 4 The waste space 450 is connected to an exhaust channel 460. This design allows gas inside the mold to be discharged through the waste space during die casting, preventing gas stagnation from affecting the filling of the die casting liquid and ensuring the quality of the product molding.

[0041] In this invention, the liquid inlet 100 is disposed on the upper template 10.

[0042] In this utility model, the lower template 20 is provided with an upper opening mounting cavity 200, and the lower mold core 40 is detachably installed in the mounting cavity 200.

[0043] In this invention, the mounting space 400 is a mounting hole that is larger at the bottom and smaller at the top. The shape of the shaft post 60 is consistent with the mounting hole and is movably inserted into the mounting space 400 from bottom to top. When the lower mold core 40 is fixed in the mounting cavity 200, the bottom surface of the shaft post 60 is in contact with the inner bottom surface of the mounting cavity 200. The mounting space of the lower mold core is designed as a mounting hole that is larger at the bottom and smaller at the top, and the shaft post with the same shape is movably inserted from bottom to top. Combined with the fit between the bottom surface of the shaft post and the inner bottom surface of the mounting cavity, the position of the shaft post can be stably restricted, preventing the shaft post from shifting during die casting, ensuring the forming accuracy of the shaft hole, and facilitating the disassembly and replacement of the shaft post.

[0044] Specifically, the mounting holes can be tapered holes or countersunk holes.

[0045] In this invention, the lower mold core 40 can be fixedly connected to the lower template 20 by bolts.

[0046] In this utility model, the lower template 20 is provided with a plurality of ejector pins 70 that move up and down relative to the lower template 20, and the first molding cavity 410 is provided with a plurality of ejector pin holes 470, and the ejector pins 70 are movably disposed in the ejector pin holes 470.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. 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 technical features indicated.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold structure for a motor front bracket, characterized in that: It includes an upper template (10), a lower template (20), an upper mold core (30), and a lower mold core (40); the upper mold core (30) is fixedly disposed on the upper template (10), and the lower mold core (40) is fixedly disposed on the lower template (20); The upper surface of the lower mold core (40) is provided with a plurality of first molding cavities (410); the lower surface of the upper mold core (30) is provided with a plurality of second molding cavities (310) corresponding to the first molding cavities (410); The first molding cavity (410) and the second molding cavity (310) that are corresponding to each other are connected to form a molding cavity (50); A first communicating space (420) with a downward recess is provided on the upper surface of the lower mold core (40) on one side of the first molding cavity (410), and a second communicating space (320) with an upward recess is provided on the lower surface of the upper mold core (30) corresponding to the position of the first communicating space (420); the second communicating space (320) is connected to the second molding cavity (310); The first molding cavity (410) is provided with a vertically penetrating installation space (400), and the installation space (400) is detachably connected to a shaft column (60); the shaft column (60) extends upward and fits against the top surface of the second molding cavity (310); A liquid flow channel is provided between the upper mold core (30) and the lower mold core (40), which is connected to the first communication space (420) and the second communication space (320); the liquid flow channel is connected to the liquid inlet (100).

2. The die-casting mold structure for a motor front bracket according to claim 1, characterized in that: The liquid flow channel includes a main flow channel (440) and several branch flow channels (430) that are interconnected with the main flow channel (440). The branch flow channels (430) are connected to the first connecting space (420) and the second connecting space (320) at the end away from the main flow channel (440).

3. The die-casting mold structure for a motor front bracket according to claim 2, characterized in that: Two adjacent first connected spaces (420) and two adjacent second connected spaces (320) are connected to the same branch channel (430).

4. The die-casting mold structure for a motor front bracket according to claim 1, characterized in that: A recessed waste space (450) is provided on the lower mold core (40) on one side of the first molding cavity (410).

5. The die-casting mold structure for a motor front bracket according to claim 4, characterized in that: The waste space (450) is connected to an exhaust channel (460).

6. The die-casting mold structure for a motor front bracket according to claim 1, characterized in that: The liquid inlet (100) is located on the upper template (10).

7. The die-casting mold structure for a motor front bracket according to claim 1, characterized in that: The lower template (20) is provided with an upper opening mounting cavity (200), and the lower mold core (40) is detachably installed in the mounting cavity (200).

8. The die-casting mold structure for a motor front bracket according to claim 7, characterized in that: The mounting space (400) is a mounting hole that is larger at the bottom and smaller at the top. The shape of the shaft (60) is consistent with the mounting hole and is movably inserted into the mounting space (400) from bottom to top. When the lower mold core (40) is fixed in the mounting cavity (200), the bottom surface of the shaft column (60) is in contact with the inner bottom surface of the mounting cavity (200).

9. The die-casting mold structure for a motor front bracket according to claim 1, characterized in that: The lower template (20) is provided with a plurality of ejector pins (70) that move up and down relative to the lower template (20). The first molding cavity (410) is provided with a plurality of ejector pin holes (470), and the ejector pins (70) are movably disposed in the ejector pin holes (470).

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