Case end cover self-overturning die device

Abstract

The utility model belongs to the technical field of machine shell production dies, and particularly relates to a machine shell end cover self-overturning die device. The shell end cover self-overturning mold device comprises a mold body, an axial tension bar and a vertical tension bar, a pouring basin is fixed on the mold body, the pouring basin is communicated with a cavity, the mold body is fixed with the vertical tension bar in the vertical direction, and the mold body is fixed with the axial tension bar through shaft connection in the axial direction. The die body comprises an upper die and a lower die, the upper die comprises an upper template and an upper die connecting rod, one end of the upper die connecting rod is fixed with the upper template, and the other end of the upper die connecting rod is fixed with the upper die fixing plate; the lower die comprises a lower die plate and a lower die connecting rod, one end of the lower die connecting rod is fixed to the lower die plate, and the other end of the lower die connecting rod is fixed to the lower die fixing plate. According to the machine shell end cover self-overturning mold device, automatic overturning of the mold body is achieved, time and labor are saved, the pouring basin is arranged on the lower mold in a matched mode, smooth feeding of materials is achieved, and efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of casing production molds, and particularly relates to a casing end cover self-turning mold device. Background Art

[0002] The performance, reliability, and lifespan of the motor—the core drive unit of new energy vehicles (NEVs)—rely heavily on the precision manufacturing of key components. As a crucial component of the motor structure, the motor end cover fulfills multiple critical functions: sealing the motor's internal cavity (to protect against dust and water), supporting precision bearings (to ensure rotor centering accuracy and smooth rotation), integrating cooling channels (to efficiently dissipate heat), providing a mounting interface (for connection to the vehicle body or reducer), and serving as a component of electromagnetic shielding. Therefore, the motor end cover must possess extremely high dimensional accuracy and geometric tolerances (particularly the coaxiality, roundness, and cylindricity of the bearing housing and the flatness of the mounting end face), as well as excellent mechanical strength, sealing, and thermal management.

[0003] To meet the stringent requirements of new energy vehicles for high power density, high efficiency, long life, and lightweight motors, motor end covers are primarily manufactured using aluminum alloy high-pressure die casting (HPDC) or aluminum alloy low-pressure / gravity casting. These processes efficiently mold complex components with wide variations in wall thickness and high integration density. However, regardless of the casting process employed, the core production equipment requires specialized, high-precision, long-life molds to achieve high-quality, high-volume, and consistent production.

[0004] Existing motor end cap molds use center feeding, with the material fed from the top center of the mold. This causes high-speed molten aluminum to continuously impact the same area, particularly thin-walled or sharp cores (such as bearing chamber inserts and cooling water channel cores). This causes surface material to be eroded, corroded, and wear accelerated, shortening mold life. The strong impact force can cause cantilevered or slender cores (such as those with complex cooling water channel cores) to slightly shift or elastically deform, resulting in uneven wall thickness and dimensional tolerances in the casting, directly affecting the coaxiality and installation accuracy of the bearing chamber. The impacted area is prone to cold shuts, flow marks, and increased surface roughness, requiring subsequent manual polishing, increasing costs and consistency risks.

[0005] CN217912743U discloses a device for manufacturing a new energy vehicle housing end cover, comprising an upper casting body, a lower casting body, an upper fixing rod, a lower fixing rod, a demolding device, and a reverse thrust device. The upper casting body and the lower casting body are separately provided, the upper fixing rod being fixedly provided at the upper portion of the upper casting body, a material injection port being provided in the middle portion of the upper casting body, the lower casting body being fitted to the upper casting body, a demolding device being provided at the bottom of the lower casting body, and a reverse thrust device being provided at the bottom of the demolding device. The use of a top center feeding method makes it difficult for the top casting method to meet the stringent requirements of high consistency, high reliability, long life, and lightweight for the motor end cover of new energy vehicles, becoming a bottleneck restricting product quality and production efficiency. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art and provide a self-flipping mold device for the end cover of the casing, which realizes the automatic flipping of the mold body, saves time and labor, and cooperates with the provision of a pouring basin on the lower mold to realize smooth feeding of materials with high efficiency.

[0007] The casing end cover self-flipping mold device described in the utility model includes a mold body, an axial tension rod, and a vertical tension rod. The mold body is fixed with a pouring basin, the pouring basin is connected to the mold cavity, the mold body is fixed to the vertical tension rod in the vertical direction, and the mold body is fixed to the axial tension rod in the axial direction through an axis connection.

[0008] The mold body consists of an upper mold and a lower mold. The upper mold consists of an upper mold plate and an upper mold connecting rod. One end of the upper mold connecting rod is fixed to the upper mold plate and the other end is fixed to the upper mold fixing plate. The lower mold consists of a lower mold plate and a lower mold connecting rod. One end of the lower mold connecting rod is fixed to the lower mold plate and the other end is fixed to the lower mold fixing plate. The upper mold fixing plate and the lower mold fixing plate are both composed of two parallel flat plates, fixed on opposite sides.

[0009] After the upper template and the lower template are matched, a cavity space is formed in the middle.

[0010] The gate basin is fixed to the lower mold plate by welding or bolts, and is in a position relative to the cavity.

[0011] An upper mold baffle is fixed on the upper mold plate, and the position and shape of the upper mold baffle correspond to the gate basin.

[0012] An upper die ejector panel and an upper die ejector plate are arranged between the upper die fixing plate and the upper die plate.

[0013] A lower die ejector plate and a lower die ejector panel are arranged between the lower die fixing plate and the lower die plate.

[0014] The upper template is provided with an exhaust hole.

[0015] An upper mold ejection reset rod and an upper mold ejector pin are provided between the upper mold plate and the upper mold ejector pin plate, and a lower mold ejection reset rod and a lower mold ejector pin are provided between the lower mold plate and the lower mold ejector pin plate.

[0016] An upper mold heating tube is provided on the upper mold plate, and a lower mold heating tube is provided on the lower mold plate.

[0017] The axial tension rods in this utility model secure the mold body via a shaft, providing axial rotational torque to drive the lower mold to complete a 0-90° flip. The vertical tension rods vertically secure the mold body and control the upper mold's lifting and lowering motion. They form an orthogonal motion decomposition with the axial tension rods, preventing flipping interference. This dual-rod spatial linkage achieves precise mold flipping and positioning, replacing traditional hoisting flipping methods. Both the axial and vertical tension rods utilize hydraulic telescopic structures.

[0018] The pouring basin of this utility model is fixed at the entrance of the lower mold cavity, ensuring the directional flow of molten metal into the cavity. The upper mold baffle matches the contour of the pouring basin, forming a dynamic seal when the mold is closed to prevent overflow. The pouring path and sealing structure are integrated to eliminate flash defects.

[0019] This new mold utilizes a layered ejection mechanism. The upper mold's ejector plate, upper mold pins, and part ejection are performed locally, while the lower mold's ejector plate, lower mold pins, and main part ejection are performed. A reset lever forces the ejector pins to return to their initial position before closing the mold, preventing collision with the cavity. This dual-mold independent ejection system accommodates complex demolding paths, while the reset lever ensures operational safety.

[0020] This innovative temperature control and exhaust system utilizes heating tubes embedded in the upper and lower mold plates to maintain a constant cavity temperature and reduce cold shuts. Exhaust holes, located at the highest point of the upper mold plate, exhaust air from the cavity and eliminate air bubbles. The temperature field and exhaust synergistically optimize casting density.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The utility model realizes fully automatic and precise flipping, feeding and demoulding through the spatial orthogonal cross-linking design of the axial tension rod and the vertical tension rod, replacing manual / robot-assisted flipping, improving flipping positioning accuracy, shortening time and improving efficiency.

[0023] (2) The utility model is dynamically sealed by fixing the gate basin to the lower mold plate and the upper mold baffle. When the mold is closed, the baffle and the gate basin form a closed flow channel. The direct connection design between the gate and the cavity reduces the flow channel resistance and improves the filling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the self-flipping mold device for the casing end cover.

[0025] Figure 2This is a schematic diagram of the casing end cover self-flipping mold device axially flipping 90°.

[0026] Figure 3 A cross-sectional view of the mold body.

[0027] Figure 4 This is a cross-sectional view of the mold body side.

[0028] Figure 5 Schematic diagram of the three-dimensional structure of the mold body.

[0029] Figure 6 This is a schematic diagram of the structure of the lower template viewed from above.

[0030] In the figure: 1. Mold body; 2. Axial tension rod; 3. Vertical tension rod; 4. Gate basin; 5. Upper mold ejector reset rod; 6. Upper mold ejector pin; 7. Upper mold heating tube; 8. Cavity; 9. Lower mold heating tube; 10. Lower mold ejector reset rod; 11. Lower mold ejector pin; 12. Exhaust hole; 13. Upper mold fixing plate; 14. Upper mold ejector pin panel; 15. Upper mold ejector pin plate; 16. Upper mold connecting rod; 17. Upper mold plate; 18. Lower mold plate; 19. Lower mold connecting rod; 20. Lower mold ejector pin plate; 21. Lower mold ejector pin panel; 22. Lower mold fixing plate; 23. Upper mold baffle. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to specific embodiments.

[0032] like Figure 1 As shown, the casing end cover self-turning mold device of the present invention includes a mold body 1, an axial tension rod 2, and a vertical tension rod 3. Figure 3-6 As shown, the mold body 1 is fixed with a pouring basin 4, the pouring basin 4 is connected to the cavity 8, the mold body 1 is fixed to the vertical tension rod 3 in the vertical direction, and the mold body 1 is fixed to the axial tension rod 2 in the axial direction through an axis connection.

[0033] like Figure 5 As shown, the mold body 1 includes an upper mold and a lower mold. The upper mold includes an upper mold plate 17 and an upper mold connecting rod 16. One end of the upper mold connecting rod 16 is fixed to the upper mold plate 17 and the other end is fixed to the upper mold fixing plate 13. The lower mold includes a lower mold plate 18 and a lower mold connecting rod 19. One end of the lower mold connecting rod 19 is fixed to the lower mold plate 18 and the other end is fixed to the lower mold fixing plate 22. The upper mold fixing plate 13 and the lower mold fixing plate 22 are each composed of two parallel flat plates, fixed on opposite sides.

[0034] like Figure 3-4 As shown, the upper template 17 and the lower template 18 are joined to form a cavity 8 in the middle. The pouring basin 4 is fixed on the lower template 18 by welding or bolts, and is in a position relative to the cavity 8.

[0035] like Figure 5 As shown, an upper mold baffle 23 is fixed to the upper mold plate 17, and the position and shape of the upper mold baffle 23 correspond to the gate basin 4. The upper mold ejector panel 14 and the upper mold ejector plate 15 are arranged between the upper mold fixing plate 13 and the upper mold plate 17. The lower mold ejector plate 20 and the lower mold ejector panel 21 are arranged between the lower mold fixing plate 22 and the lower mold plate 18. The upper mold plate 17 is provided with an exhaust hole 12. The upper mold ejection reset rod 5 and the upper mold ejector 6 are arranged between the upper mold plate 17 and the upper mold ejector plate 15, and the lower mold ejection reset rod 10 and the lower mold ejector 11 are arranged between the lower mold plate 18 and the lower mold ejector plate 20.

[0036] like Figure 3 As shown, an upper mold heating tube 7 is provided on the upper mold plate 17 , and a lower mold heating tube 9 is provided on the lower mold plate 18 .

[0037] The axial tension rod 2 of the utility model is connected to the mold body 1 through the shaft, providing an axial rotation torque to drive the lower mold to complete a 0-90° flip (such as Figures 1 to 2 (See the diagram for the state diagram). Axial tension rods 2 are connected to the lower die fixing plate 22 via a hinged shaft, driving the lower die to rotate about its horizontal axis. Vertical tension rods 3 vertically secure the die body 1 and control the upper die's lifting and lowering motion. They form an orthogonal motion decomposition with the axial tension rods, preventing interference with rollover. This dual-rod spatial linkage enables precise rollover positioning of the die, replacing traditional lifting equipment. Both axial tension rods 2 and vertical tension rods 3 utilize hydraulically retractable structures.

[0038] The pouring basin 4 of the utility model is fixed at the entrance of the cavity of the lower template 18 ( Figure 6 ), ensuring that the molten metal flows into the cavity 8 in a directional manner. The upper mold baffle 23 matches the contour of the gate basin 4 ( Figure 5 ), to prevent overflow when closing the mold. The pouring path and sealing structure are integrated to eliminate flash defects.

[0039] The mold body 1 of the present invention adopts a layered ejection mechanism. The upper mold ejector plate 15, the upper mold ejector 6, and the product are partially ejected, and the lower mold ejector plate 20, the lower mold ejector 11, and the main product are ejected. The reset rod forces the ejector to return to the initial position before closing the mold to avoid collision with the cavity. The dual-mold independent ejection system adapts to complex demoulding paths, and the reset rod ensures the safety of the action. Other internal structures involved in the upper mold and lower mold of the present invention are not included in the improvement of the present invention, so they will not be described in detail. The internal structure diagram is as follows Figure 3 and Figure 6 As shown. The specific principles of closing and opening the upper and lower molds are the same as those described in CN217912743U, and the vertical and horizontal movement of the molds are the same and will not be discussed again. Axial movement, however, relies on hydraulic drive, which can be achieved by those skilled in the art based on the present invention.

[0040] This new temperature control and exhaust system utilizes heating tubes embedded in the upper and lower mold plates to maintain a constant temperature in the mold cavity 8 and reduce cold shuts. An exhaust port 12, located at a high point in the upper mold plate 17, exhausts air from the mold cavity and eliminates air bubbles. The temperature field and exhaust synergistically optimize casting density.

[0041] The working steps of this utility model are:

[0042] Step 1: Mold Closing and Pouring

[0043] The vertical tension rod 3 drives the upper mold to press down, and the upper mold baffle 23 snaps on the pouring basin 4 to form a seal; the molten metal is injected into the cavity 8 through the pouring basin 4, and the upper mold heating tube 7 and the lower mold heating tube 9 maintain the process temperature.

[0044] Step 2: Open the mold and flip it

[0045] The vertical tension rod 3 lifts the upper mold, and the axial tension rod 2 pulls the lower mold to flip 90 degrees axially, and the product gravity turns to the demoulding position.

[0046] Step 3: Gradual ejection

[0047] Upper die ejection: The upper die ejector plate 15 pushes the upper die ejector 6 to eject the local structure;

[0048] Lower die ejection: The lower die ejector plate 20 drives the lower die ejector 11 to completely push the product out of the cavity 8;

[0049] The upper mold ejection reset rod 5 and the lower mold ejection reset rod 10 pull the ejector pin back to the safe position before mold closing.

Claims

1. A casing end cover self-turning mold device, characterized in that: The mold body (1) comprises a mold body (1), an axial tension rod (2), and a vertical tension rod (3). The mold body (1) is fixed with a pouring basin (4), the pouring basin (4) is connected to the mold cavity (8), the mold body (1) is fixed to the vertical tension rod (3) in the vertical direction, and the mold body (1) is fixed to the axial tension rod (2) in the axial direction through an axis connection.

2. The housing end cover self-turning mold device according to claim 1, characterized in that: The mold body (1) includes an upper mold and a lower mold, the upper mold includes an upper mold plate (17) and an upper mold connecting rod (16), one end of the upper mold connecting rod (16) is fixed to the upper mold plate (17), and the other end is fixed to the upper mold fixing plate (13); the lower mold includes a lower mold plate (18) and a lower mold connecting rod (19), one end of the lower mold connecting rod (19) is fixed to the lower mold plate (18), and the other end is fixed to the lower mold fixing plate (22).

3. The housing end cover self-turning mold device according to claim 2, characterized in that: After the upper template (17) and the lower template (18) are aligned, a cavity (8) is formed in the middle.

4. The housing end cover self-turning mold device according to claim 3, characterized in that: The pouring basin (4) is fixed to the lower mold plate (18) by welding or bolts at a position relative to the mold cavity (8).

5. The housing end cover self-turning mold device according to claim 4, characterized in that: An upper mold baffle (23) is fixed on the upper mold plate (17), and the position of the upper mold baffle (23) corresponds to the pouring basin (4).

6. The housing end cover self-turning mold device according to claim 5, characterized in that: An upper die ejector panel (14) and an upper die ejector plate (15) are provided between the upper die fixing plate (13) and the upper die plate (17).

7. The housing end cover self-turning mold device according to claim 6, characterized in that: A lower die ejector plate (20) and a lower die ejector panel (21) are provided between the lower die fixing plate (22) and the lower die plate (18).

8. The casing end cover self-turning mold device according to any one of claims 2 to 7, characterized in that: The upper template (17) is provided with an air extraction hole (12).

9. The housing end cover self-turning mold device according to claim 7, characterized in that: An upper mold ejection reset rod (5) and an upper mold ejector pin (6) are provided between the upper mold plate (17) and the upper mold ejector pin plate (15), and a lower mold ejection reset rod (10) and a lower mold ejector pin (11) are provided between the lower mold plate (18) and the lower mold ejector pin plate (20).

10. The housing end cover self-turning mold device according to claim 9, characterized in that: An upper mold heating tube (7) is provided on the upper mold plate (17), and a lower mold heating tube (9) is provided on the lower mold plate (18).

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