A casting equipment for aluminum alloy shell of electric motorcycle battery pack

Abstract

The present invention relates to the technical field of aluminum alloy shell casting, and specifically to an electric motorcycle battery pack aluminum alloy shell casting device, comprising a mold unit, a mold opening and closing unit, a quantitative injection unit and a water cooling unit. The mold unit consists of a replaceable left mold and a right mold, and quick mold change is achieved by removing the screws. At the same time, when the molten metal is injected into the mold cavity, the exhausted gas enters the gas storage cylinder to push the push plate, and the rack and pinion structure drives the water baffle to deflect, so that the cooling water flow rate is automatically matched with the mold cavity volume. The larger the mold cavity, the greater the gas pressure, the greater the deflection angle of the water baffle, and the greater the cooling water flow rate. The injection unit adopts an inclined injection cylinder with an extrusion head design with an exhaust hole, which automatically exhausts during liquid injection and closes the exhaust hole during injection. The present invention realizes adaptive adjustment of the cooling system, which is more water-saving than traditional equipment. At the same time, through modular mold design and air pressure linkage control, it has the advantages of high production efficiency, good casting quality and low energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy shell casting, in particular to an aluminum alloy shell casting device for an electric motorcycle battery pack. Background Art

[0002] During traditional aluminum alloy casing casting processes, the cooling system's water flow rate is typically fixed or manually adjusted, making it difficult to adapt to the diverse cooling requirements of castings of varying sizes. For small or thin-walled castings, constant high-flow cooling wastes water resources and can cause internal stress in the casting due to overly rapid cooling. For large or thick-walled castings, insufficient cooling can extend production cycles and even lead to deformation or shrinkage due to uneven heat dissipation.

[0003] Therefore, it is necessary to develop an electric motorcycle battery pack aluminum alloy shell casting equipment to solve the above problems. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] An electric motorcycle battery pack aluminum alloy shell casting device includes a mold unit, the mold unit including a mold unit, the mold unit including a left mold and a right mold that cooperate with each other, a water cooling unit is provided in the left mold, the water cooling unit includes multiple groups of cooling water channels, the cooling water channels are supplied with water by a water inlet pipe, and the flow rate of the water inlet pipe is controlled by a water flow regulating unit;

[0006] The water flow regulating unit includes a water retaining plate, which is arranged in the water inlet pipe and driven by an external push plate to deflect the angle to achieve the effect of controlling the flow rate. The push plate is slidably connected in the air reservoir.

[0007] A sealing cover is provided on the periphery of the left mold. When the left mold and the right mold are closed and the metal liquid is injected, the gas in the mold cavity formed by the left mold and the right mold will enter the gas storage cylinder, and then the gas pushes the push plate to drive the water baffle to deflect a preset angle, thereby adjusting the water amount in the water inlet pipe, and then adjusting the cooling water flow rate of the cooling water circuit.

[0008] Preferably, it also includes a mold opening and closing unit, which includes a base, both ends of the base are fixedly connected to a fixed plate and a fixed module, a sliding module is slidably connected to the base, the sealing cover is fixedly connected to the sliding module, the sliding module is located between the fixed module and the fixed plate, and a plurality of guide rods for guiding the sliding module are fixedly connected between the fixed module and the fixed plate, and the guide rods are slidably connected to the sliding module.

[0009] Preferably, a No. 1 gear driven by a motor is provided on both sides of the sliding module, and a No. 1 rack is provided on the inner wall of the base. The motor drives the No. 1 gear to rotate and engage with the No. 1 rack, thereby driving the sliding module to move.

[0010] Preferably, the left mold is fixedly connected to the sliding module through disassembly screws and mounting holes, and the right mold is fixedly connected to the fixed module through the disassembly screws and the mounting holes. An air outlet for exhaust is provided on the upper end surface of the right mold, and a feed port for the molten metal to enter is provided on the side of the right mold.

[0011] Preferably, it also includes a quantitative shooting unit, which includes a shooting cylinder, which is tilted in the fixed module, one end of the shooting cylinder is connected to the feed port, the shooting cylinder and the injection tube are fixedly connected, a ceramic one-way valve is provided in the injection tube, and a push column is slidably connected in the shooting cylinder, and the two sides of the push column are clamped by the driving wheel, and the driving wheel is driven to rotate by the motor so that the push column moves to a preset position in the shooting cylinder.

[0012] Preferably, the push pin is fixedly connected to a blocking ring at one end close to the feed port, and an extrusion head slidably connected to the injection cylinder is provided on one side of the blocking ring, and a movable cavity is provided on the extrusion head. A T-shaped connecting rod is fixedly connected to the blocking ring, and the blocking ring and the extrusion head are movably connected through the T-shaped connecting rod. An exhaust hole for exhaust is provided on the upper part of the extrusion head, and an electromagnetically controlled alloy metal valve is provided at the end of the injection cylinder close to the feed port.

[0013] Preferably, the water cooling unit further includes a water outlet pipe, and the water outlet pipe is connected to the lower ends of the multiple groups of cooling water channels.

[0014] Preferably, a safety valve is fixed on the air cylinder, and the air cylinder is fixedly connected to the upper end of the sealing cover. The sealing cover is communicated with the air cylinder through an air guide tube. A push plate is movably connected to the inside of the air cylinder through a reset spring. The push plate is fixedly connected to a push rod at one end close to the water inlet pipe, and the end of the push rod is fixedly connected to a No. 2 rack, the No. 2 rack is meshed with a No. 2 gear, and the No. 2 gear is rotatably connected to the outer wall of the water inlet pipe, and the No. 2 gear is fixedly connected to the water retaining plate through a rotating shaft, and a sealing ring is nested on the water retaining plate.

[0015] Preferably, a limiting ring is fixedly connected to the inner wall of the gas storage cylinder.

[0016] Beneficial effects of the present invention:

[0017] Intelligent Dynamic Cooling Control: Automatically adjusts cooling water flow based on mold cavity capacity, utilizing gas expelled during molten metal injection to drive the deflection of the water retaining plate, precisely matching the cooling flow rate to the casting volume. Gas in large mold cavities pushes the water retaining plate to a full 90° opening, while the opening is proportionally reduced in smaller mold cavities. This avoids wasted cooling water for small parts while ensuring efficient cooling of larger parts, resulting in improved energy efficiency.

[0018] Modular mold-changing design: The left and right molds are secured by screws and mounting holes, allowing for quick mold changes to accommodate the production of battery pack casings of varying specifications. Combined with a cooling system that integrates a sealing cover and pneumatic linkage, manual parameter adjustments are unnecessary after mold changes, ensuring a high degree of automation.

[0019] Eliminate air bubbles: The tilted shot cylinder and extrusion head vent design allow for natural gas discharge during injection; a blocking ring seals the vent when the plunger is advanced. Combined with a ceramic check valve and alloy metal valve, the purity of the molten metal is improved and the porosity of the casting is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] in:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural diagram of the mold opening and closing unit;

[0024] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0025] Figure 4 It is a structural diagram of the mold opening and closing unit, the mold unit and the water adjustment unit;

[0026] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0027] Figure 6 for Figure 4 Enlarged schematic diagram at point C in the middle;

[0028] Figure 7 Schematic diagram of the structure of the mold unit;

[0029] Figure 8 Schematic diagram of disassembly of the mold unit, fixed module and sliding module;

[0030] In the picture:

[0031] 1. Mold opening and closing unit; 11. Base; 12. Sliding module; 13. Fixed module; 14. Guide rod; 15. Gear No. 1; 16. Rack No. 1; 17. Fixed plate;

[0032] 2. Mold unit; 21. Mold unit; 211. Left mold; 212. Right mold; 213. Air outlet; 214. Feed inlet; 22. Removal screws; 23. Mounting holes;

[0033] 3. Quantitative injection unit; 31. Push column; 32. Injection cylinder; 33. Liquid injection tube; 34. Alloy metal valve; 35. Extrusion head; 36. Exhaust hole; 37. Blocking ring; 38. Active cavity; 39. T-shaped connecting rod;

[0034] 4. Water cooling unit; 41. Water inlet pipe; 42. Cooling water circuit; 43. Water outlet pipe;

[0035] 5. Water volume regulating unit; 51. Air reservoir; 52. Return spring; 53. Safety valve; 54. Air guide tube; 55. Push plate; 56. Push rod; 57. No. 2 rack; 58. Limiting ring; 59. No. 2 gear; 510. Water retaining plate; 511. Sealing ring; 512. Sealing cover. DETAILED DESCRIPTION

[0036] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Example:

[0038] like Figure 1-Figure 5 As shown, an electric motorcycle battery pack aluminum alloy shell casting device includes a mold unit 2, which includes a mold unit 21. The mold unit 21 includes a left mold 211 and a right mold 212 that cooperate with each other. A water cooling unit 4 is provided in the left mold 211. The water cooling unit 4 includes multiple groups of cooling water channels 42. The cooling water channels 42 are supplied with water by a water inlet pipe 41. The flow rate of the water inlet pipe 41 is controlled by a water flow regulating unit 5.

[0039] Among them, the water volume regulating unit 5 includes a water retaining plate 510, which is arranged in the water inlet pipe 41. The water retaining plate 510 is driven by an external push plate 55, thereby deflecting the angle to achieve the effect of controlling the flow rate. The push plate 55 is slidably connected in the air storage cylinder 51; in the initial state (when the mold is opened), the cross-sections of the water retaining plate 510 and the water inlet pipe 41 are parallel. At this time, the cooling water in the water inlet pipe 41 does not flow. When the water retaining plate 510 is deflected, a gap is formed between the water retaining plate 510 and the inner wall of the water inlet pipe 41, and the cooling water passes through the gap. By adjusting the deflection angle of the water retaining plate 510, the size of the gap formed between the water retaining plate 510 and the inner wall of the water inlet pipe 41 can be controlled, thereby controlling the flow rate of the cooling water.

[0040] A sealing cover 512 is provided on the periphery of the left mold 211. When the left mold 211 and the right mold 212 are closed and the metal liquid is injected, the gas in the mold cavity formed by the left mold 211 and the right mold 212 will enter the gas storage cylinder 51, and then the gas pushes the push plate 55 to drive the water retaining plate 510 to deflect the preset angle, thereby adjusting the water volume in the water inlet pipe 41, and then adjusting the cooling water flow rate of the cooling water channel 42; after the left mold 211 and the right mold 212 are merged, the sealing cover 512 and the fixed module 13 are abutted to form The closed space, so when the molten metal is injected into the mold cavity formed by the left mold 211 and the right mold 212, the molten metal pushes the gas in the mold cavity to be discharged from the air outlet 213 into the closed space, so that the gas in the closed space is compressed into the air storage cylinder 51, so that the air pushes the push plate 55 to move. When the push plate 55 moves, it drives the push rod 56 and the No. 2 rack 57 to move, and the No. 2 gear 59 rotates, driving the water retaining plate 510 to deflect, thereby adjusting the water flow rate entering the cooling water path 42. It is worth noting that the left mold 211 and the right mold 212 form a mold unit 21, and the mold unit 21 is installed on the sliding module 12 and the fixed module 13 by removing the screws 22 and the mounting holes 23, so it is convenient to replace different mold units 21 during casting, which makes it more applicable. At the same time, the mold cavities formed by different mold units 21 have different shapes, so the volume of molten metal to be injected is also different. However, during casting, the molten metal needs to fill the mold cavity, so the different volumes of gas in the mold cavity can push the push plate 55 to move different distances, thereby causing the water retaining plate 510 to deflect at different angles. Therefore, when the mold cavity is large, the more molten metal (the greater the overall heat), and the faster the water flow rate of the cooling water channel 42, which can cool the casting faster.

[0041] A safety valve 53 is fixed on the air cylinder 51, and the air cylinder 51 is fixedly connected to the upper end of the sealing cover 512. The sealing cover 512 is connected to the air cylinder 51 through the air guide tube 54. The inside of the air cylinder 51 is movably connected with a push plate 55 through a reset spring 52. The push plate 55 is fixedly connected to a push rod 56 at one end close to the water inlet pipe 41. The end of the push rod 56 is fixedly connected to a No. 2 rack 57. The No. 2 rack 57 is meshed with a No. 2 gear 59. The No. 2 gear 59 is rotatably connected to the outer wall of the water inlet pipe 41. The No. 2 gear 59 is fixedly connected to the water retaining plate 510 through a rotating shaft. A sealing ring 511 is nested on the water retaining plate 510.

[0042] A limit ring 58 is fixedly connected to the inner wall of the air reservoir 51. When the push plate 55 moves to its maximum position, it abuts the limit ring 58. At this point, the second rack 57 drives the second gear 59 to rotate to its maximum position. Simultaneously, the water retaining plate 510 rotates from parallel to the water inlet pipe 41 to perpendicular to it. At this point, the water flow rate in the water inlet pipe 41 reaches its highest point. If gas continues to flow into the air reservoir 51, the safety valve 53 will release the gas. Therefore, when the cavity formed by the mold unit 21 is large enough, the gas in the cavity first pushes the push plate 55 to move and contact the limiting ring 58. At this time, the water retaining plate 510 is perpendicular to the cross-section of the water inlet pipe 41. At this time, the flow of the cooling water channel 42 is the largest, which is suitable for rapid cooling of the casting formed by the large cavity. After the gas in the cavity continues to enter the air storage cylinder 51, since the push plate 55 is limited by the limiting ring 58, the pressure of the air storage cylinder 51 increases, triggering the safety valve 53 to discharge excess gas and maintain contact between the push plate 55 and the limiting ring 58.

[0043] The water cooling unit 4 further includes a water outlet pipe 43 , which is connected to the lower ends of the plurality of cooling water channels 42 .

[0044] In the embodiment, the left mold 211 and the right mold 212 are closed to form a cavity, and the sealing cover 512 and the fixed module 13 are abutted, so that the mold unit 21 is in a sealed space, and then the molten metal is injected through the feed port 214 on the right mold 212, and the molten metal fills the cavity to form a casting. At the same time, the molten metal compresses the gas in the cavity into the sealed space, and then enters the air storage cylinder 51 through the air guide pipe 54. Then the gas pushes the push plate 55 to drive the push rod 56 and the No. 2 rack 57 to move, and the No. 2 rack 57 drives the No. 2 gear 59 to rotate. When the No. 2 gear 59 rotates, it drives the water retaining plate 510 to deflect, thereby opening the water outlet pipe 43 (the water outlet pipe 43 is connected to the external water input pipe and has pressure), so that the cooling water of the water outlet pipe 43 enters the cooling water channel 42, and is then discharged from the water outlet pipe 43, thereby cooling the casting in the mold cavity. After cooling, the left mold 211 and the right mold 212 are opened. At this time, there is no pressure in the sealed space, and the reset spring 52 extends to drive the push plate 55 to slide toward the position of the safety valve 53 to reset. At the same time, the push rod 56 pulls the No. 2 rack 57 to reset, and the No. 2 rack 57 drives the No. 2 gear 59 to reverse, and the No. 2 gear 59 drives the water retaining plate 510 to rotate in the opposite direction, so that the cross-section of the water retaining plate 510 and the water inlet pipe 41 are parallel again. At this time, the water path of the water inlet pipe 41 is closed (after opening the mold, the casting in the mold cavity has been formed and no longer needs cooling, so the water path of the water inlet pipe 41 is closed).

[0045] In the above process, it can be understood that different mold units 21 are required when making aluminum alloy shells of battery packs of different specifications, so the capacity of the mold cavity is also inconsistent. The larger the capacity of the mold cavity, the more molten metal is required, and thus the total heat is greater, so more cooling water is needed to cool the casting. Therefore, when the mold cavity capacity is larger, when the mold cavity is filled, more gas enters the air storage cylinder 51, thereby pushing the push plate 55 farther, and ultimately making the water retaining plate 510 rotate at a larger angle (0 degrees-90 degrees), so that the water flow in the water inlet pipe 41 is larger, and the water flow in the cooling water channel 42 is larger, so that the cooling speed is faster. In summary, the present device can dynamically adjust the water flow rate of the cooling water channel 42 according to the difference of the mold unit 21, which can save water (the cooling water of the traditional equipment will flow at a constant speed, but the small-sized or thinner battery pack aluminum alloy shell casting has low heat and fast cooling speed, resulting in waste of cooling water, while the large-sized or thicker battery pack aluminum alloy shell casting has high heat and slow cooling speed, and the constant flow rate of cooling water will prolong the cooling time, resulting in low production efficiency).

[0046] like Figure 1 、 Figure 4 、 Figure 7 and Figure 8As shown, the mold opening and closing unit 1 includes a base 11, and the two ends of the base 11 are fixedly connected to a fixed plate 17 and a fixed module 13 respectively. A sliding module 12 is slidably connected to the base 11, and a sealing cover 512 is fixedly connected to the sliding module 12. The sliding module 12 is located between the fixed module 13 and the fixed plate 17. A plurality of guide rods 14 for guiding the sliding module 12 are fixedly connected between the fixed module 13 and the fixed plate 17, and the guide rods 14 and the sliding module 12 are slidably connected.

[0047] A first gear 15 driven by a motor is provided on both sides of the sliding module 12 , and a first rack 16 is provided on the inner wall of the base 11 . The motor drives the first gear 15 to rotate and engage with the first rack 16 , thereby driving the sliding module 12 to move.

[0048] The left mold 211 is fixedly connected to the sliding module 12 by removing the screws 22 and the mounting holes 23, and the right mold 212 is fixedly connected to the fixed module 13 by removing the screws 22 and the mounting holes 23. The upper end surface of the right mold 212 is provided with an air outlet 213 for exhaust, and the side surface of the right mold 212 is provided with a feed port 214 for the entry of molten metal; the mold unit 21 formed by the left mold 211 and the right mold 212 is modularly installed by removing the screws 22 and the mounting holes 23, so that the mold unit 21 is easy to replace, making the device more applicable.

[0049] In this embodiment, during mold closing, the motor drives the first gear 15 to rotate. Since the first gear 15 meshes with the first rack 16, the sliding module 12 drives the left mold 211 to slide along the guide rod 14 toward the right mold 212. Ultimately, the left and right molds 211, 212 merge, completing mold closing and allowing the casting process to proceed. After the casting cools, the motor drives the first gear 15 to rotate in the opposite direction. This causes the sliding module 12 to drive the left mold 211 to slide along the guide rod 14 away from the right mold 212. Ultimately, the left and right molds 211, 212 separate, completing mold opening and the casting process.

[0050] like Figure 4 、 Figure 5 and Figure 6 As shown, the quantitative injection unit 3 includes a injection cylinder 32, which is tilted and arranged in the fixed module 13. One end of the injection cylinder 32 is connected to the feed port 214. The injection cylinder 32 is fixedly connected to the injection pipe 33. A ceramic one-way valve is provided in the injection pipe 33. A push column 31 is slidably connected in the injection cylinder 32. The two sides of the push column 31 are clamped by a driving wheel, and the driving wheel is driven to rotate by a motor so that the push column 31 moves to a preset position in the injection cylinder 32.

[0051] One end of the push pin 31 near the feed port 214 is fixedly connected to a blocking ring 37, and one side of the blocking ring 37 is provided with an extrusion head 35 slidably connected to the injection cylinder 32, and the extrusion head 35 is provided with a movable cavity 38, and a T-shaped connecting rod 39 is fixedly connected to the blocking ring 37. The blocking ring 37 and the extrusion head 35 are movably connected through the T-shaped connecting rod 39, and an exhaust hole 36 for exhaust is provided on the upper part of the extrusion head 35, and an electromagnetically controlled alloy metal valve 34 is provided at one end of the injection cylinder 32 near the feed port 214.

[0052] In this embodiment, after the left mold 211 and the right mold 212 are closed, molten metal is quantitatively added to the injection cylinder 32 through the injection pipe 33 (the amount of molten metal is determined according to the model of the mold unit 21 used at this time), and at the same time, the push column 31 drives the extrusion head 35 to a preset position (the positions of the push column 31 and the extrusion head 35 are adjusted by the motor and the drive wheel), and the space formed by the extrusion head 35 and the alloy metal valve 34 in the injection cylinder 32 is equal to the volume of the injected molten metal (the drive wheel is driven by the motor to rotate, which can drive the push column 31 and the extrusion head 35 to move, and the size of the space formed by the extrusion head 35 and the alloy metal valve 34 in the injection cylinder 32 is determined by controlling the position of the extrusion head 35). Therefore, the volume of the molten metal quantitatively added by the injection pipe 33 and the position of the extrusion head 35 are controlled by the external system and will not be elaborated here.

[0053] When the injection tube 33 adds molten metal to the shot cylinder 32, the molten metal fills the shot cylinder 32. At the same time, because the shot cylinder 32 is set at an angle, the gas in the shot cylinder 32 can be discharged through the exhaust hole 36. Finally, the shot cylinder 32 in the section of the alloy metal valve 34 and the extrusion head 35 is filled with molten metal (this volume of molten metal just meets the mold cavity size of the mold unit 21 at this time). The motor then drives the drive wheel to move the push rod 31. The push rod 31 drives the blocking ring 37 to block the exhaust hole 36. The blocking ring 37 drives the extrusion head 35 to squeeze the molten metal in the shot cylinder 32 (at this time, the alloy metal valve 34 is opened by electromagnetic control, and a one-way valve is installed in the injection tube 33), allowing the molten metal to enter the mold cavity to form a casting.

[0054] The T-shaped connecting rod 39 connected in the movable cavity 38 can make the extrusion head 35 and the blocking ring 37 movably connected, first playing the role of exhausting gas from the exhaust hole 36. At the same time, during the injection process, the blocking ring 37 can block the exhaust hole 36, allowing the molten metal to enter the mold cavity.

[0055] In the above process, when traditionally adding molten metal, the molten metal is poured into the shot cylinder 32 by manual or mechanical filling equipment. This will cause a large amount of air to be contained in the shot cylinder 32. Finally, during the injection process, the molten metal and air flow together under pressure, causing air to form bubbles in the molten metal, which ultimately causes bubbles in the casting, affecting the quality of the casting.

[0056] The workflow is as follows:

[0057] During mold closing, the motor drives the No. 1 gear 15 to rotate. Since the No. 1 gear 15 and the No. 1 rack 16 are meshed, the sliding module 12 drives the left mold 211 to slide along the guide rod 14 toward the right mold 212. Finally, the left mold 211 and the right mold 212 merge to complete the mold closing. Subsequently, the injection pipe 33 is used to quantitatively inject molten metal into the injection cylinder 32. At the same time, the push rod 31 drives the extrusion head 35 to a preset position. When the injection pipe 33 injects the molten metal into the injection cylinder 32, the molten metal will fill the injection cylinder 32. At the same time, since the injection cylinder 32 is set at an angle, the gas in the injection cylinder 32 can be discharged through the exhaust hole 36. Finally, the injection cylinder 32 including the alloy metal valve 34 and the extrusion head 35 is filled with molten metal. Then the motor drives the driving wheel to move the push rod 31, and the push rod 31 drives the blocking ring 37 to block the exhaust hole 36. The blocking ring 37 drives the extrusion head 35 to squeeze the molten metal in the injection cylinder 32, so that the molten metal enters the mold cavity to form a casting. In the above process, the left mold 211 and the right mold 212 are closed to form a cavity. At the same time, the sealing cover 512 and the fixed module 13 are abutted, so that the mold unit 21 is in a sealed space. When the molten metal is added, the molten metal compresses the gas in the cavity into the sealed space, and then enters the gas storage cylinder 51 through the air guide pipe 54. Then the gas pushes the push plate 55 to drive the push rod 56 and the second rack 57 to move. The second rack 57 drives the second gear 59 to rotate. When the second gear 59 rotates, it drives the water retaining plate 510 to deflect, thereby opening the outlet pipe 43, allowing the cooling water in the outlet pipe 43 to enter the cooling water channel 42 and then be discharged from the outlet pipe 43, thereby cooling the casting in the mold cavity. After cooling, the left mold 211 and the right mold 212 are opened. At this time, there is no pressure in the sealed space, and the reset spring 52 extends to drive the push plate 55 to slide toward the position of the safety valve 53 to reset. At the same time, the push rod 56 pulls the No. 2 rack 57 to reset, and the No. 2 rack 57 drives the No. 2 gear 59 to reverse, and the No. 2 gear 59 drives the water retaining plate 510 to rotate in the opposite direction, making the cross-section of the water retaining plate 510 and the water inlet pipe 41 parallel again. At this time, the water channel of the water inlet pipe 41 is closed.

[0058] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A casting device for an aluminum alloy shell of an electric motorcycle battery pack, comprising a mold unit (2), wherein the mold unit (2) comprises a mold unit (21), and the mold unit (21) comprises a left mold (211) and a right mold (212) that cooperate with each other, characterized in that: A water cooling unit (4) is provided in the left mold (211), and the water cooling unit (4) includes multiple groups of cooling water channels (42). The cooling water channels (42) are supplied with water by a water inlet pipe (41), and the flow rate of the water inlet pipe (41) is controlled by a water flow regulating unit (5); The water volume regulating unit (5) comprises a water retaining plate (510), the water retaining plate (510) being arranged in the water inlet pipe (41), the water retaining plate (510) being driven by an external push plate (55), thereby deflecting the angle to achieve the effect of controlling the flow rate, and the push plate (55) being slidably connected in the air storage cylinder (51); A sealing cover (512) is provided on the periphery of the left mold (211). When the left mold (211) and the right mold (212) are closed and metal liquid is injected, the gas in the mold cavity formed by the left mold (211) and the right mold (212) enters the gas storage cylinder (51), and then the gas pushes the push plate (55) to drive the water retaining plate (510) to deflect a preset angle, thereby adjusting the water volume in the water inlet pipe (41), and further adjusting the cooling water flow rate of the cooling water channel (42); A safety valve (53) is fixed on the air storage cylinder (51), and the air storage cylinder (51) is fixedly connected to the upper end of the sealing cover (512). The sealing cover (512) is communicated with the air storage cylinder (51) through an air guide tube (54). A push plate (55) is movably connected to the inside of the air storage cylinder (51) through a return spring (52). The push plate (55) is fixedly connected to a push rod (56) at one end close to the water inlet pipe (41). The end of the push rod (56) is fixedly connected to a second rack (57). The second rack (57) is meshed with a second gear (59). The second gear (59) is rotatably connected to the outer wall of the water inlet pipe (41). The second gear (59) is fixedly connected to the water retaining plate (510) through a rotating shaft. A sealing ring (511) is nested on the water retaining plate (510).

2. The electric motorcycle battery pack aluminum alloy shell casting equipment as described in claim 1, characterized in that: The mold opening and closing unit (1) further comprises a base (11), wherein the two ends of the base (11) are fixedly connected to a fixed plate (17) and a fixed module (13), respectively; a sliding module (12) is slidably connected to the base (11); the sealing cover (512) is fixedly connected to the sliding module (12); the sliding module (12) is located between the fixed module (13) and the fixed plate (17); a plurality of guide rods (14) for guiding the sliding module (12) are fixedly connected between the fixed module (13) and the fixed plate (17); and the guide rods (14) are slidably connected to the sliding module (12).

3. The electric motorcycle battery pack aluminum alloy shell casting equipment as described in claim 2, characterized in that: A first gear (15) driven by a motor is provided on both sides of the sliding module (12), and a first rack (16) is provided on the inner wall of the base (11). The motor drives the first gear (15) to rotate and engage with the first rack (16), thereby driving the sliding module (12) to move.

4. The electric motorcycle battery pack aluminum alloy shell casting equipment as described in claim 3, characterized in that: The left mold (211) is fixedly connected to the sliding module (12) via the disassembly screws (22) and the mounting holes (23), and the right mold (212) is fixedly connected to the fixed module (13) via the disassembly screws (22) and the mounting holes (23).

5. The electric motorcycle battery pack aluminum alloy shell casting equipment as described in claim 4, characterized in that: An air outlet (213) for exhaust is provided on the upper end surface of the right mold (212), and a feed port (214) for the entry of molten metal is provided on the side surface of the right mold (212).

6. The electric motorcycle battery pack aluminum alloy shell casting equipment as described in claim 5, characterized in that: The invention also includes a quantitative injection unit (3), wherein the quantitative injection unit (3) includes a injection cylinder (32), the injection cylinder (32) is tiltedly arranged in the fixed module (13), one end of the injection cylinder (32) is connected to the feed port (214), the injection cylinder (32) and the injection pipe (33) are fixedly connected, a ceramic one-way valve is provided in the injection pipe (33), a push column (31) is slidably connected in the injection cylinder (32), both sides of the push column (31) are clamped by a driving wheel, and the driving wheel is driven to rotate by a motor so that the push column (31) moves to a preset position in the injection cylinder (32).

7. The electric motorcycle battery pack aluminum alloy shell casting equipment as described in claim 6, characterized in that: The push column (31) is fixedly connected to a blocking ring (37) at one end close to the feed port (214), and an extrusion head (35) slidably connected to the injection cylinder (32) is provided on one side of the blocking ring (37). The extrusion head (35) is provided with a movable cavity (38). A T-shaped connecting rod (39) is fixedly connected to the blocking ring (37), and the blocking ring (37) and the extrusion head (35) are movably connected via the T-shaped connecting rod (39). An exhaust hole (36) for exhaust is provided on the upper part of the extrusion head (35), and an electromagnetically controlled alloy metal valve (34) is provided at one end of the injection cylinder (32) close to the feed port (214).

8. The electric motorcycle battery pack aluminum alloy shell casting equipment as described in claim 1, characterized in that: The water cooling unit (4) further includes a water outlet pipe (43), and the water outlet pipe (43) is connected to the lower ends of the plurality of cooling water channels (42).

9. The electric motorcycle battery pack aluminum alloy shell casting equipment as described in claim 8, characterized in that: A limiting ring (58) is fixedly connected to the inner wall of the air storage cylinder (51).

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