New energy automobile motor rear cover integrated die-casting die

Abstract

The utility model relates to die casting mould technical field, concretely relates to a new energy automobile motor rear cover integrated die casting mould, including front mould, the main runner is fixedly installed on the front mould, the outside of front mould is provided with back mould, the side of back mould is fixedly installed with the die core close to front mould, the outside of main runner is fixedly connected with the shunt, the inner side of shunt rotatably is provided with the baffle. Through monitoring mechanism to the molten metal pressure flowing in the die core monitoring, real -time capture the pressure dynamic of different area such as recess, through groove, provide data support for pressure compensation, thereby through the flow control mechanism adjustment shunt molten metal flow, accurate distribution each shunt molten metal flow, solved the die casting mould's cavity different structure area pressure demand differentiation, difficult real -time perception cavity internal molten metal pressure change, leading to pressure control lag, the technical problem of high product defect rate.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically to an integrated die-casting mold for the rear cover of a new energy vehicle motor. Background Technology

[0002] The one-piece die-casting mold for motor rear cover is a special mold used to produce motor rear covers. Molten metal is injected into the mold cavity under high pressure, and after cooling, it forms the specific shape of the motor rear cover. The one-piece molded motor rear cover does not require much subsequent processing and trimming, saving manufacturing time. The motor rear cover is usually part of the motor housing and is mainly used to protect the internal mechanical parts of the motor and provide support structure.

[0003] Chinese Patent Publication No. CN217912789U discloses a die-casting mold for front and rear covers of motors, including an upper mold plate and a lower mold plate connected by guide pillars. An upper mold core is fixedly installed inside the upper mold plate, and a lower mold core is installed inside the lower mold plate. An upper cavity is formed on the upper mold core, and a lower cavity is formed on the lower mold core. The upper and lower mold cores are combined to form the cavities for molding the front and rear covers of the motors. An insert is provided at the center of each cavity. There are four symmetrically distributed cavities. A sprue sleeve is embedded on one side of the upper mold plate, passing through the upper and lower mold cores sequentially. A flow channel communicating with the cavity is opened on the lower mold core, and the flow channel is connected to the sprue sleeve. This die-casting mold has a simple structure and reasonable design. The upper and lower mold cores are aligned and positioned by a positioning groove and a positioning block. Liquid metal is injected from the sprue sleeve, flows through the flow channel, and fills the cavity. Four front and rear covers of motors are die-cast at once. After pressure molding, the upper and lower mold plates separate, and a push plate pushes a push rod to eject the product.

[0004] The aforementioned patent proposes that the die-casting mold uses the lower core of the moving mold and the upper core of the fixed mold to combine and form the cavity of the front and rear covers of the motor. However, the cavity of the front and rear covers of the motor is not a simple integral structure; it contains different detailed parts such as grooves and through slots. These parts have different requirements for the molten metal pressure during die casting. Using a uniform pressure for die casting makes it difficult to meet the forming requirements of all parts. Therefore, we propose an integrated die-casting mold for the rear cover of a new energy vehicle motor. Utility Model Content

[0005] To address the aforementioned issues, a die-casting mold for an integrated rear cover of a new energy vehicle motor is provided. This mold uses a monitoring mechanism to monitor the pressure of the molten metal flowing within the mold core, capturing real-time pressure dynamics in different areas such as grooves and channels. This provides data support for pressure compensation, allowing the flow control mechanism to adjust the flow rate of the molten metal in each flow channel. This precisely distributes the molten metal flow rate in each flow channel, solving the technical problem of inconsistent pressure requirements in different structural areas of the die-casting mold cavity, making it difficult to perceive changes in the molten metal pressure inside the cavity in real time, leading to delayed pressure control and high product defect rates.

[0006] To address the existing technical problems, this utility model provides an integrated die-casting mold for the rear cover of a new energy vehicle motor, including a front mold, a main flow channel fixedly installed on the front mold, a rear mold arranged on the outer side of the front mold, a mold core fixedly installed on the side of the rear mold near the front mold, a branch flow channel fixedly connected to the outer side of the main flow channel, and a partition plate rotatably arranged on the inner side of the branch flow channel; a flow control mechanism for driving the partition plate to rotate is provided between the front mold and the partition plate; and a monitoring mechanism for monitoring the forming pressure on the surface of the mold core is provided on the mold core.

[0007] Preferably, the flow control mechanism includes a connecting rod, a power component, and a transmission assembly; the connecting rod is rotatably mounted on the front mold, and the lower end of the connecting rod is fixedly connected to the partition plate; the power component is fixedly mounted on the front mold, and the output end of the power component is fixedly connected to the upper end of the connecting rod; the transmission assembly is disposed between the power component and the connecting rod, and the transmission assembly is used to convert the linear driving force output by the power component into the rotational driving force of the connecting rod.

[0008] Preferably, the transmission assembly includes a guide rod and a guide seat; the guide rod is disposed above the connecting rod, and one end of the guide rod is fixedly connected to the output end of the power component; the guide seat is fixedly connected to the side of the connecting rod near the guide rod, and a guide groove is provided on the guide seat, which slides with the guide rod.

[0009] Preferably, the monitoring mechanism includes an annular groove and a sensing element; the annular groove is formed on the mold core; the sensing element is disposed inside the annular groove.

[0010] Preferably, a shell is fitted onto the side of the mold core near the annular groove, and a first sealing ring is provided on each side of the shell, with the two sides of the first sealing ring being fixedly connected to the mold core and the shell respectively.

[0011] Preferably, the outer casing has a mounting groove, a sensing window is provided in the mounting groove, and a buffer layer is provided between the annular groove and the sensing element.

[0012] Preferably, a second sealing ring is provided between the outer casing and the sensing window, and the two sides of the second sealing ring are fixedly connected to the outer casing and the sensing window respectively.

[0013] The advantages of this utility model compared to the prior art are: 1. By monitoring the pressure of the molten metal flowing inside the mold core through a monitoring mechanism, the pressure dynamics of different areas such as grooves and channels are captured in real time, providing data support for pressure compensation. This allows the flow control mechanism to adjust the flow rate of the molten metal in the distribution channels, accurately distributing the flow rate of the molten metal in each distribution channel. This solves the technical problem of the differential pressure requirements of different structural areas of the die-casting mold cavity, the difficulty in real-time sensing of changes in the pressure of the molten metal inside the cavity, which leads to lagging pressure control and high product defect rate.

[0014] 2. By setting an outer shell, a first sealing ring, a sensing window, a buffer layer, and a second sealing ring on the outside of the sensor, the cleanliness and stability of the working environment of the sensor are ensured. This solves the technical problem of sensor damage, signal drift, and difficulty in long-term stable capture of cavity pressure data caused by impurities such as high temperature, high pressure impact, molten metal splash, and mold release agent residue under die casting conditions. Attached Figure Description

[0015] Figure 1 This utility model application presents a three-dimensional schematic diagram of the front mold and main channel of an integrated die-casting mold for the rear cover of a new energy vehicle motor.

[0016] Figure 2 This utility model application presents a three-dimensional schematic diagram of the front mold and power component of an integrated die-casting mold for the rear cover of a new energy vehicle motor.

[0017] Figure 3 This utility model application presents a three-dimensional schematic diagram of the rear mold and mold core of an integrated die-casting mold for the rear cover of a new energy vehicle motor.

[0018] Figure 4 This utility model application presents a three-dimensional schematic diagram of the guide rod and guide seat of an integrated die-casting mold for the rear cover of a new energy vehicle motor.

[0019] Figure 5 This utility model application presents a three-dimensional schematic diagram of the sensing element and buffer layer of an integrated die-casting mold for the rear cover of a new energy vehicle motor.

[0020] Figure 6 yes Figure 2 Enlarged diagram of point A in the middle.

[0021] Figure 7 yes Figure 4 Enlarged diagram of point B in the middle.

[0022] The numbers in the diagram are: 1. Front mold; 11. Main runner; 12. Rear mold; 13. Mold core; 2. Runner; 21. Partition plate; 22. Connecting rod; 23. Power component; 24. Guide rod; 25. Guide seat; 26. Outer shell; 27. First sealing ring; 28. Sensing component; 29. ​​Sensing window; 210. Buffer layer; 211. Second sealing ring. Detailed Implementation

[0023] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0024] See Figures 1-3As shown, a die-casting mold for an integrated rear cover of a new energy vehicle motor includes a front mold 1, a main flow channel 11 fixedly mounted on the front mold 1, a rear mold 12 disposed on the outer side of the front mold 1, a mold core 13 fixedly mounted on the side of the rear mold 12 near the front mold 1, a branch flow channel 2 fixedly connected to the outer side of the main flow channel 11, and a partition 21 rotatably disposed on the inner side of the branch flow channel 2; a flow control mechanism for driving the partition 21 to rotate is disposed between the front mold 1 and the partition 21; and a monitoring mechanism for monitoring the forming pressure on the surface of the mold core 13 is disposed on the mold core 13.

[0025] Specifically, the flow channel 2 includes cavity groove branch channel and cavity through groove branch channel. The flow channel 2 can quickly guide the molten metal into the groove and through groove of the cavity to ensure rapid diffusion of the molten metal.

[0026] When the die-casting mold is put into operation, after the front mold 1 and the rear mold 12 complete the mold closing action, the molten metal is injected into the main channel 11 under high pressure. Then, the molten metal in the main channel 11 is introduced into the branch channel 2, and together with the molten metal in the branch channel 2, it quickly fills the entire cavity.

[0027] The monitoring mechanism collects real-time dynamic pressure data from different structural areas of the mold core 13, such as the grooves and through slots, providing precise data support for pressure compensation. The flow control mechanism drives the baffle 21 to rotate, achieving real-time regulation of the molten metal flow rate within the distribution channel 2. Based on the pressure data fed back by the monitoring mechanism, the flow rate of the distribution channel 2 is dynamically adjusted by rotating the baffle 21, ensuring sufficient flow in the deep cavity groove area to guarantee complete filling at the end, while maintaining a balanced flow in the through slot area to avoid pressure leakage, thus precisely adapting to the filling requirements of different structural areas.

[0028] Simultaneously, by adjusting the flow distribution ratio of each runner 2, the filling speed of molten metal in each area of ​​the cavity is balanced, effectively avoiding molding defects such as cold shuts and weld lines caused by excessively fast filling in some areas and delayed filling in others, ensuring the synchronous molding quality of the overall structure of the motor rear cover. The flow control of the runner 2 is linked with the pressure monitoring data. When insufficient pressure is detected in a certain area, the flow rate of the corresponding runner 2 is increased by rotating the baffle 21 to supplement the pressure; when overload is detected in a certain area, the flow rate of the corresponding runner 2 is reduced to avoid problems such as flash and cavity deformation, achieving dynamic balance between pressure and flow rate during the die casting process.

[0029] See Figures 1-4 and Figure 7As shown, the flow control mechanism includes a connecting rod 22, a power component 23, and a transmission assembly. The connecting rod 22 is rotatably mounted on the front mold 1, and its lower end is fixedly connected to the partition plate 21. The power component 23 is fixedly mounted on the front mold 1, and its output end is fixedly connected to the upper end of the connecting rod 22. The transmission assembly is located between the power component 23 and the connecting rod 22, and is used to convert the linear driving force output by the power component 23 into the rotational driving force of the connecting rod 22. The transmission assembly includes a guide rod 24 and a guide seat 25. The guide rod 24 is located above the connecting rod 22, and one end of the guide rod 24 is fixedly connected to the output end of the power component 23. The guide seat 25 is fixedly connected to the side of the connecting rod 22 near the guide rod 24, and a guide groove is provided on the guide seat 25, which slides with the guide rod 24.

[0030] Specifically, the power component 23 is preferably a high-temperature resistant cylinder. The guide rod 24 and the guide groove of the guide seat 25 form a sliding guide pair.

[0031] When the partition 21 needs to rotate, the power component 23 of the corresponding diversion channel 2 is activated, and the output end of the power component 23 drives the guide rod 24 to generate linear displacement. The guide rod 24 and the guide groove of the guide seat 25 form a sliding guide pair to ensure that the guide rod 24 slides stably along the guide groove.

[0032] During the sliding process, the guide rod 24 squeezes and drives the guide plate to move synchronously. The guide plate pushes the connecting rod 22 to achieve directional displacement through transmission. Then, the connecting rod 22 drives the partition 21 to rotate and adjust within the diversion channel 2, ultimately achieving control of the molten metal flow rate within the diversion channel 2.

[0033] See Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the monitoring mechanism includes an annular groove and a sensor 28; the annular groove is formed on the mold core 13; the sensor 28 is disposed in the annular groove; a housing 26 is fitted on the side of the mold core 13 near the annular groove, and a first sealing ring 27 is provided on both sides of the housing 26, and the two sides of the first sealing ring 27 are fixedly connected to the mold core 13 and the housing 26 respectively; an installation groove is formed on the housing 26, and a sensing window 29 is provided in the installation groove; a buffer layer 210 is provided between the annular groove and the sensor 28; a second sealing ring 211 is provided between the housing 26 and the sensing window 29, and the two sides of the second sealing ring 211 are fixedly connected to the housing 26 and the sensing window 29 respectively.

[0034] Specifically, the sensing element 28 is preferably a thin-film pressure sensor. The housing 26 is preferably made of wear-resistant alloy steel. The first sealing ring 27 is preferably a fluororubber sealing ring. The buffer layer 210 is preferably a zirconia ceramic fiber and a thin graphite gasket. The zirconia ceramic fiber can wrap around the sensing element 28 to reduce the conduction of high temperature from the mold to the sensing element 28. The thin graphite gasket is placed between the zirconia ceramic fiber and the sensing element 28 to provide buffering and vibration reduction. The second sealing ring 211 is preferably a silicon nitride ceramic sheet sealing ring, which does not affect pressure transmission and can resist high temperature and impact.

[0035] When the molten metal in the main runner 11 is introduced into the branch runner 2 and, together with the molten metal in the branch runner 2, rapidly fills the entire cavity, the sensor 28 installed on the mold core 13 directly senses the pressure of the molten metal inside the cavity through the sensing window 29. The buffer layer 210 can effectively resist the impact of molten metal filling and the high temperature conduction of the mold, avoiding damage to the sensor 28 or signal drift; the first sealing ring 27 and the second sealing ring 211 form a double sealing structure to prevent impurities such as molten metal splashes and mold release agent residues from seeping into the annular groove, ensuring the cleanliness and stability of the working environment of the sensor 28.

[0036] The sensor 28 captures the pressure dynamics of different areas such as grooves and through slots in real time and accurately feeds the pressure signal back to the die-casting control system. This provides real-time data support for the flow control mechanism to adjust the flow of the diversion channel 2 and compensate for local pressure, ensuring that the pressure of each structural area is accurately matched with the filling requirements, thereby reducing the probability of forming defects such as material shortage, flash, and shrinkage from the source.

[0037] Working Principle: After the die-casting mold is put into operation, the molten metal in the main runner 11 and the branch runner 2 work together to complete the rapid filling action of the cavity. At this time, the sensor 28 directly senses the pressure of the molten metal inside the cavity through the sensing window 29 and accurately feeds back the pressure signal to the die-casting control system. Based on the pressure feedback data, the control system determines whether the power component 23 of the corresponding branch runner 2 should be activated. When the activation conditions are met, the output end of the power component 23 drives the guide rod 24 to generate displacement. Through the transmission cooperation between the guide rod 24 and the guide seat 25, the connecting rod 22 is driven to rotate, and then the baffle 21 completes the precise control of the molten metal flow rate in the branch runner 2.

[0038] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A die-casting mold for an integrated rear cover of a new energy vehicle motor, comprising a front mold (1), a main channel (11) fixedly mounted on the front mold (1), a rear mold (12) disposed on the outer side of the front mold (1), and a mold core (13) fixedly mounted on the side of the rear mold (12) near the front mold (1), characterized in that, A branch channel (2) is fixedly connected to the outside of the main channel (11), and a partition (21) is rotatably provided on the inside of the branch channel (2). A flow control mechanism for driving the partition (21) to rotate is provided between the front mold (1) and the partition (21); The mold core (13) is equipped with a monitoring mechanism for monitoring the forming pressure on the surface of the mold core (13).

2. The integrated die-casting mold for the rear cover of a new energy vehicle motor according to claim 1, characterized in that, The flow control mechanism includes a connecting rod (22), a power component (23), and a transmission assembly; The connecting rod (22) is rotatably mounted on the front mold (1), and the lower end of the connecting rod (22) is fixedly connected to the partition plate (21); The power component (23) is fixedly installed on the front mold (1), and the output end of the power component (23) is fixedly connected to the upper end of the connecting rod (22); The transmission assembly is located between the power component (23) and the connecting rod (22). The transmission assembly is used to convert the linear driving force output by the power component (23) into the rotational driving force of the connecting rod (22).

3. The integrated die-casting mold for the rear cover of a new energy vehicle motor according to claim 2, characterized in that, The transmission assembly includes a guide rod (24) and a guide seat (25); The guide rod (24) is positioned above the connecting rod (22), and one end of the guide rod (24) is fixedly connected to the output end of the power component (23); The guide seat (25) is fixedly connected to the side of the connecting rod (22) near the guide rod (24). The guide seat (25) has a guide groove, which slides with the guide rod (24).

4. The integrated die-casting mold for the rear cover of a new energy vehicle motor according to claim 1, characterized in that, The monitoring mechanism includes annular grooves and sensors (28); The annular groove is formed on the mold core (13); The sensing element (28) is disposed in the annular groove.

5. The integrated die-casting mold for the rear cover of a new energy vehicle motor according to claim 4, characterized in that, The mold core (13) is fitted with a shell (26) on the side near the annular groove. The shell (26) is provided with a first sealing ring (27) on both sides. The first sealing ring (27) is fixedly connected to the mold core (13) and the shell (26) on both sides respectively.

6. The integrated die-casting mold for the rear cover of a new energy vehicle motor according to claim 5, characterized in that, An installation slot is provided on the outer casing (26), and a sensing window (29) is provided in the installation slot. A buffer layer (210) is provided between the annular groove and the sensing element (28).

7. The integrated die-casting mold for the rear cover of a new energy vehicle motor according to claim 6, characterized in that, A second sealing ring (211) is provided between the outer casing (26) and the sensing window (29), and the two sides of the second sealing ring (211) are fixedly connected to the outer casing (26) and the sensing window (29) respectively.

Images