Shrinkage-proof motor box die-casting die

Abstract

The utility model provides an anti-shrinkage motor box die-casting die, which relates to the technical field of die-casting dies, and comprises a lower die and an upper die, the lower die and the upper die are internally provided with a formed motor box main body, two sides of the lower die and two sides of the upper die are respectively provided with an extrusion mechanism, and the extrusion mechanisms are arranged on the lower die and the upper die. And one side of the motor box main body is provided with an oil duct. Before forming, the first extrusion oil cylinder and the second extrusion oil cylinder are utilized in advance to insert the two extrusion pins into the corresponding positions of the upper conveying hole and the lower conveying hole after forming, then the space formed between the extrusion sleeve and the extrusion pins is utilized, a pouring channel can be changed, and the shrinkage condition after the upper conveying hole and the lower conveying hole are formed is avoided; the two extrusion pins can block the two ends of the oil duct, and in the casting process, the pressure of the thick and large part of the motor box body can be increased, and shrinkage porosity is avoided.

Description

A die-casting mold for motor housing with anti-shrinkage hole Technical Field

[0001] This utility model relates to the field of die-casting mold technology, and more specifically, to a die-casting mold for motor housing with anti-shrinkage hole. Background Technology

[0002] The automotive motor housing is the casing used to house the motor. Motor housings are typically formed by die casting, which requires the use of die casting molds. Motor housings have high sealing performance requirements and contain complex high-pressure oil and water channels. These channels cannot be pre-cast during the die casting stage and require subsequent machining, resulting in thicker sections on the casting with large machining allowances. During the die casting of these areas, shrinkage cavities and porosity defects occur, affecting the overall performance of the motor housing. Therefore, we have made improvements by proposing a shrinkage-cavity-resistant die casting mold for motor housings. Summary of the Invention

[0003] The main purpose of this utility model is to provide a die-casting mold for motor housing with anti-shrinkage hole, which can effectively solve the problem.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A die-casting mold for preventing shrinkage holes in a motor housing includes a lower mold and an upper mold. The lower mold and the upper mold have a formed motor housing body inside them. Both sides of the lower mold and the upper mold are provided with extrusion mechanisms, and one side of the motor housing body is provided with an oil passage.

[0006] Preferably, an upper conveying hole is installed on one side of the upper surface of the motor housing body, and a lower conveying hole is installed on one side of the lower surface of the motor housing body. The upper and lower conveying holes are respectively connected to the upper and lower ends of the oil passage.

[0007] Preferably, the extrusion mechanism includes a first extrusion cylinder and a second extrusion cylinder, wherein the first extrusion cylinder is installed on the bottom side of the lower mold and the second extrusion cylinder is installed on the top side of the upper mold.

[0008] Preferably, one end of the first extrusion cylinder and the second extrusion cylinder are each equipped with a connecting seat for fixing, and the output ends of the first extrusion cylinder and the second extrusion cylinder are each equipped with a connecting rod.

[0009] Preferably, a support sleeve is installed on one end surface of the first and second extrusion cylinders and on the outside of the connecting rod, and an extrusion pin is installed on one end of each connecting rod.

[0010] Preferably, each of the support sleeves is fitted with a compression sleeve at one end and outside the compression pin, and one end of each of the two compression pins is inserted into the lower conveying hole and the upper conveying hole respectively, and one end of each of the two compression sleeves is fitted with the ends of the lower conveying hole and the upper conveying hole respectively.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] Before molding, the first and second extrusion cylinders are used to insert two extrusion pins into the corresponding positions of the upper and lower conveying holes after molding. The space formed between the extrusion sleeve and the extrusion pins can be used to change the pouring channel and avoid shrinkage after the upper and lower conveying holes are molded. The two extrusion pins can block the two ends of the oil channel. During the casting process, the pressure in the thick parts of the motor housing body can be increased to avoid shrinkage. Attached Figure Description

[0013] Figure 1 is a three-dimensional structural schematic diagram of this utility model;

[0014] Figure 2 is a front view of the internal structure of the mold after molding according to this utility model;

[0015] Figure 3 is a schematic diagram of the three-dimensional structure of the mold after molding according to this utility model;

[0016] Figure 4 is a schematic diagram of the main structure of the motor housing of this utility model;

[0017] Figure 5 is a schematic diagram of the main structure of the motor box from another angle of this utility model;

[0018] Figure 6 is a schematic diagram of the specific structure of the extrusion mechanism of this utility model;

[0019] Figure 7 is an internal cross-sectional view of the extrusion mechanism of this utility model.

[0020] In the diagram: 1. Lower mold; 2. Upper mold; 3. Motor housing body; 4. Extrusion mechanism; 401. First extrusion cylinder; 402. Connecting seat; 403. Connecting rod; 404. Support sleeve; 405. Extrusion pin; 406. Extrusion sleeve; 407. Second extrusion cylinder; 5. Oil passage; 6. Upper conveying hole; 7. Lower conveying hole. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0022] As shown in Figures 1 to 5, a die-casting mold for a motor housing with anti-shrinkage hole includes a lower mold 1 and an upper mold 2. The lower mold 1 and the upper mold 2 are equipped with a formed motor housing body 3 inside the mold. Extrusion mechanisms 4 are provided on both sides of the lower mold 1 and the upper mold 2. An oil passage 5 is provided on one side of the motor housing body 3. An upper conveying hole 6 is installed on one side of the upper surface of the motor housing body 3, and a lower conveying hole 7 is installed on one side of the lower surface of the motor housing body 3. The upper conveying hole 6 and the lower conveying hole 7 are respectively connected to the upper and lower ends of the oil passage 5.

[0023] As shown in Figures 2, 3, 6, and 7, the extrusion mechanism 4 includes a first extrusion cylinder 401 and a second extrusion cylinder 407. The first extrusion cylinder 401 is installed on the bottom side of the lower mold 1, and the second extrusion cylinder 407 is installed on the top side of the upper mold 2. A connecting seat 402 for fixing is installed at one end of both the first extrusion cylinder 401 and the second extrusion cylinder 407. A connecting rod 403 is installed at the output end of both the first extrusion cylinder 401 and the second extrusion cylinder 407. A support sleeve 404 is installed on the surface of one end of the first extrusion cylinder 401 and the second extrusion cylinder 407 outside the connecting rod 403. An extrusion pin 405 is installed at one end of each connecting rod 403. An extrusion sleeve 406 is installed at one end of each support sleeve 404 outside the extrusion pin 405. One end of each of the two extrusion pins 405 is inserted into the lower conveying hole 7 and the upper conveying hole 6, respectively. One end of each of the two extrusion sleeves 406 is in contact with the ends of the lower conveying hole 7 and the upper conveying hole 6, respectively.

[0024] Before molding, the first extrusion cylinder 401 and the second extrusion cylinder 407 are used to insert two extrusion pins 405 into the corresponding positions of the upper conveying hole 6 and the lower conveying hole 7 after molding. The space formed between the extrusion sleeve 406 and the extrusion pins 405 can be used to change the pouring channel and avoid shrinkage after the upper conveying hole 6 and the lower conveying hole 7 are molded. The two extrusion pins 405 can block the two ends of the oil channel 5. During the casting process, the pressure in the thick part of the motor housing body 3 can be increased to avoid shrinkage porosity.

[0025] The working principle of this type of anti-shrinkage hole motor housing die-casting mold:

[0026] In use, the first extrusion cylinder 401 and the second extrusion cylinder 407 are installed above the upper conveying hole 6 and the lower conveying hole 7 using the connecting seat 402. After the lower mold 1 and the upper mold 2 are engaged, the first extrusion cylinder 401 and the second extrusion cylinder 407 push the connecting rod 403 to move, so that the connecting rod 403 pushes the extrusion pin 405 to move, controlling the extrusion pin 405 to move downward, so that it moves to the position after the upper conveying hole 6 and the lower conveying hole 7 are formed. During the forming process, the extrusion pin 405 can be used to extrude the inner wall of the upper conveying hole 6 and the lower conveying hole 7 during the forming process, adjust the gating, and avoid shrinkage cavities inside the upper conveying hole 6 and the lower conveying hole 7. The extrusion pin 405 limits the upper conveying hole 6 and the lower conveying hole 7, which can block the two ends of the oil passage 5 and play a role in pressurizing the oil passage 5 part of the motor housing body 3. The use of local pressurization process can reduce the shrinkage porosity caused by the forming process of the thick part of the motor housing body 3.

[0027] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A die-casting mold for an anti-shrinkage motor housing, comprising a lower mold (1) and an upper mold (2), characterized in that: The lower mold (1) and the upper mold (2) are provided with a formed motor housing body (3) inside the lower mold (1) and the upper mold (2). Extrusion mechanisms (4) are provided on both sides of the lower mold (1) and the upper mold (2). An oil passage (5) is provided on one side of the motor housing body (3).

2. The motor housing die-casting mold for preventing shrinkage holes according to claim 1, characterized in that: An upper conveying hole (6) is installed on one side of the upper surface of the motor housing body (3), and a lower conveying hole (7) is installed on one side of the lower surface of the motor housing body (3). The upper conveying hole (6) and the lower conveying hole (7) are respectively connected to the upper and lower ends of the oil passage (5).

3. The motor housing die-casting mold for preventing shrinkage holes according to claim 1, characterized in that: The extrusion mechanism (4) includes a first extrusion cylinder (401) and a second extrusion cylinder (407). The first extrusion cylinder (401) is installed on the bottom side of the lower mold (1), and the second extrusion cylinder (407) is installed on the top side of the upper mold (2).

4. The motor housing die-casting mold for preventing shrinkage holes according to claim 3, characterized in that: One end of the first extrusion cylinder (401) and the second extrusion cylinder (407) is equipped with a connecting seat (402) for fixing, and the output end of the first extrusion cylinder (401) and the second extrusion cylinder (407) is equipped with a connecting rod (403).

5. The motor housing die-casting mold for preventing shrinkage holes according to claim 4, characterized in that: Support sleeves (404) are installed on one end surface of the first extrusion cylinder (401) and the second extrusion cylinder (407) and on the outside of the connecting rod (403). An extrusion pin (405) is installed on one end of each connecting rod (403).

6. The motor housing die-casting mold for preventing shrinkage holes according to claim 5, characterized in that: Each of the support sleeves (404) has a compression sleeve (406) installed at one end and outside the compression pin (405). One end of each of the two compression pins (405) is inserted into the lower conveying hole (7) and the upper conveying hole (6), respectively. One end of each of the two compression sleeves (406) is in contact with the ends of the lower conveying hole (7) and the upper conveying hole (6), respectively.

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