Die casting device and method for battery pack shell of new energy automobile

Abstract

The invention relates to the technical field of battery pack shell die-casting equipment, and provides a new energy automobile battery pack shell die-casting device and method.The new energy automobile battery pack shell die-casting device comprises a transmission bracket, the transmission bracket comprises a hollow tray, and a plurality of dies are distributed on the top of the hollow tray; and a transmission mechanism is arranged on one side of the transmission bracket and can intermittently rotate the hollow tray, so that a mold arranged on the upper side of the hollow tray can be intermittently revolved. A refrigerant conveying mechanism is arranged on one side of the bottom frame, and refrigerants stored in the refrigerant conveying mechanism can be conveyed into the mold through a transmission mechanism to locally cool the mold. And a stirring mechanism is arranged on the inner side of the molten metal charging basket, and molten metal stored in the molten metal charging basket can be stirred and mixed. And a material conveying mechanism is arranged on the lower side of the molten metal material barrel, and in the process that the transmission mechanism drives the stirring mechanism, molten metal stored in the molten metal material barrel can be conveyed into the mold through the material conveying mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack shell die-casting equipment, and specifically, to a new energy vehicle battery pack shell die-casting device and method. Background Art

[0002] Die casting is a metal casting process characterized by the use of high pressure on the molten metal in the mold cavity. The mold is usually made of a higher strength alloy, and the process is somewhat similar to injection molding. Most die castings are iron-free, such as zinc, copper, aluminum, magnesium, lead, tin, lead-tin alloys and their alloys. The existing new energy vehicle battery shell die casting mold has become more and more mature, but there are still many problems or defects. The traditional new energy vehicle battery shell die casting mold has poor cooling effect after injection molding, which reduces the use effect of the new energy vehicle battery shell die casting mold. To this end, after searching, the existing patent (Announcement No.: CN219335925U) discloses a new energy vehicle battery shell die-casting mold, which includes a fixed plate, the upper surface of the fixed plate is fixedly connected to an injection molding box, the inner top wall of the injection molding box is fixedly connected to two electric push rods, and the telescopic ends of the two electric push rods are commonly fixedly connected to a pressure plate. Through the cooperation of the refrigerator and the conduction plate, the cold air is transferred to the conduction plate. The connecting plate is used to reinforce the refrigerator. The cooperation of the conduction plate and the cooling plate can transfer the cold air to the cooling plate, so as to achieve the purpose of quickly cooling the battery shell inside the cooling plate and the injection molding groove, which solves the problem of poor cooling effect of the traditional new energy vehicle battery shell die-casting mold after injection molding.

[0003] However, there are still some shortcomings in the above scheme: The existing die-casting mold has a low degree of automation. After the molten metal injection is completed, it is necessary to wait for the mold to be formed before unloading and finally the next molten metal injection can be carried out. The whole process has low work efficiency; During the working process of the existing die-casting mold, a large amount of molten metal needs to be reserved for die-casting. However, as the die-casting work continues, the large amount of molten metal will precipitate and stratify, resulting in uneven quality of the die-cast battery pack shell. Existing die-casting molds have relatively simple functionality and lack linkage between various workstations. They often need to be equipped with multiple drive devices for operation, which has high usage costs. Summary of the invention

[0004] The present invention proposes a new energy vehicle battery pack shell die-casting device and method, which solves the problems in the related art of low automation and working efficiency of the die-casting mold, and uneven quality of the die-cast battery pack shell due to precipitation and stratification of the reserved molten metal.

[0005] The technical solution of the present invention is as follows: a die-casting device for a battery pack shell of a new energy vehicle comprises: a base frame and a molten metal bucket arranged above the base frame for storing molten metal, one side of the molten metal bucket is fixedly connected to a hopper, a plurality of electric heating rods are embedded in the inner wall of the molten metal bucket, a transmission bracket is arranged on the top of the base frame, the transmission bracket comprises a hollow tray, and a plurality of molds are distributed in a circular array on the top of the hollow tray; A transmission mechanism is provided on one side of the transmission bracket, through which the hollow tray can be intermittently rotated, so that the mold arranged on the upper side of the hollow tray can be intermittently revolved; A refrigerant conveying mechanism is provided on one side of the base frame for storing refrigerant, and the refrigerant stored in the refrigerant conveying mechanism can be conveyed to the mold through the transmission mechanism to cool the mold locally; A stirring mechanism is arranged inside the molten metal barrel, and the stirring mechanism can be driven by the transmission mechanism, so that the molten metal stored inside the molten metal barrel can be stirred and mixed; A feeding mechanism is arranged at the lower side of the molten metal barrel. During the process in which the transmission mechanism drives the stirring mechanism, the molten metal stored in the molten metal barrel can be transported to the mold through the feeding mechanism.

[0006] Preferably, the transmission mechanism includes an upper piston, a lower piston and a support seat fixed to the top of the base frame by bolts, the top of the support seat is fixed with a support plate, the upper and lower outer walls of the support plate are fixed with a limit plate, and lifting rods are slidably sleeved inside the two limit plates, the top end of one of the lifting rods is fixed to the upper piston, and the bottom end of the other lifting rod is fixed to the lower piston.

[0007] Preferably, the transmission mechanism also includes a linkage component arranged on the support plate, the linkage component includes a connecting shaft rotatably sleeved inside the support plate, a disc and a passive gear are respectively fixedly connected at both ends of the connecting shaft, a plurality of active shafts are fixedly connected to the outer wall of the active shaft, a rotating frame is fixedly connected to the outer wall of the passive gear, a fixed column is fixedly connected to the outer wall of the rotating frame, a transmission frame is slidably sleeved on the outer side of the fixed column, the lifting rod is fixedly connected to the transmission frame, a motor is fixedly installed inside the support plate, and an active gear meshing with the passive gear is fixedly connected to the end of the output shaft of the motor.

[0008] Preferably, the feeding mechanism includes a piston tube fixedly connected to the bottom of the molten metal barrel, the upper piston sliding sleeve is arranged inside the piston tube, the lifting rod slides through the bottom end of the piston tube, the outer wall of the piston tube is fixedly connected to a Y-type tube, and both ends of the Y-type tube connected to the piston tube are provided with one-way valves, and the end of the Y-type tube away from the piston tube is fixedly connected to a feeding plug, and the bottom of the molten metal barrel is fixedly provided with a plurality of connecting tubes connected to the piston tube, and each of the connecting tubes is provided with a one-way valve.

[0009] Preferably, the stirring mechanism includes a lifting shaft fixedly connected to the top of the upper piston, the lifting shaft slidingly passes through the bottom of the molten metal barrel, the top of the lifting shaft is rotatably connected to a rotating disk, a plurality of through openings are opened inside the rotating disk, a plurality of stirring shafts are slidably arranged inside the rotating disk, a plurality of arc-shaped inclined grooves are opened in a circular array on the outer periphery of the rotating disk, the center axes of the top and bottom ports of two adjacent arc-shaped inclined grooves coincide, a plurality of steering columns cooperating with the arc-shaped inclined grooves are fixedly connected to the inner wall of the molten metal barrel, and the plurality of steering columns are arranged vertically.

[0010] Preferably, the mold includes an extended support frame and a short-circuit support frame, the upper ends of the extended support frame and the short-circuit support frame are commonly fixedly connected to a lower mold, the top of the lower mold is overlapped with an upper mold, an injector is arranged on one side of the top of the upper mold, a molding cavity is opened inside the lower mold, a cooling cavity is opened inside the lower mold located at the lower side of the molding cavity, and the short-circuit support frame and the extended support frame are both connected to the cooling cavity.

[0011] Preferably, the transmission bracket includes a support platform fixedly connected to the top of the base frame, a hollow pallet is rotatably connected to the top of the support platform, a hollow outer ring is rotatably sleeved on the outer periphery of the hollow pallet, a support plate for supporting the hollow outer ring is fixedly connected between the hollow outer ring and the base frame, a plurality of connecting holes are equidistantly provided on the outer periphery of the hollow pallet, the hollow pallet and the interior of the hollow outer ring are connected through the connecting holes, the lower port of the short-circuit support frame is fixedly connected to the interior of the hollow pallet, the extended support frame is fixedly passed through the interior of the hollow pallet, and the lower end of the extended support frame is in an open state, and a plurality of driven shift shafts cooperating with the active shift shaft are distributed in a ring array on the outer side of the top of the hollow pallet.

[0012] Preferably, the syringe includes a T-tube fixedly connected to the interior of the upper mold, an upper seat is provided on the upper side of the T-tube, a movable cavity for sliding of the T-tube is provided inside the upper seat, a return spring is connected to the inner side of the movable cavity, and an injection port connected to the T-tube is provided at the top of the upper seat.

[0013] Preferably, the refrigerant delivery mechanism includes a temporary storage cylinder fixedly mounted on the base frame, and the bottom of the side wall of the temporary storage cylinder is fixedly connected with a medium one-way inlet pipe and a medium one-way outlet pipe, and one end of the medium one-way inlet pipe and the medium one-way outlet pipe connected to the temporary storage cylinder is provided with a one-way valve, the medium one-way outlet pipe is connected to the hollow outer ring through a connecting pipe, and the lower piston is slidably mounted inside the temporary storage cylinder.

[0014] A new energy vehicle battery pack shell die-casting method comprises the following steps: S1. Pre-store an appropriate amount of molten metal in the molten metal barrel through the hopper, turn on the power, start the motor through the external control device, the motor drives the driving gear to rotate through its output shaft, the driving gear drives the passive gear to rotate, the passive gear drives the rotating frame to rotate, when the rotating frame rotates, the fixed column pushes the transmission frame, so that the transmission frame can drive the two lifting rods to move up and down reciprocatingly, at the same time, when the passive gear rotates, it can drive the disc to rotate synchronously through the connecting shaft; S2. When the lifting rod drives the upper piston to reciprocate up and down inside the piston tube, when the upper piston moves down, the one-way valve inside the connecting pipe port opens, and the one-way valve at the Y-shaped pipe port closes, so that the molten metal stored in the molten metal barrel is sucked into the piston tube, and when the upper piston moves up, the one-way valve inside the connecting pipe port closes, and the one-way valve at the Y-shaped pipe port opens, and the molten metal inside the piston tube is transported to the syringe through the Y-shaped pipe and the material delivery cannula, and then transported to the mold cavity formed between the upper mold and the lower mold through the syringe; S3. During the up-and-down reciprocating movement of the upper piston, the lifting shaft can drive the rotating disk to reciprocate up and down. The rotating disk moves up and down on the outer wall of the stirring shaft. The arc-shaped inclined groove on the outer periphery of the rotating disk is pushed by the steering column, which makes the rotating disk rotate while moving vertically, thereby driving the stirring shaft to rotate inside the molten metal barrel, stirring and mixing the molten metal inside the molten metal barrel evenly. S4. Every time the disc rotates one circle, the active and driven shafts can push and rotate the hollow outer ring once. Assuming that there are N molds in total, the hollow outer ring can rotate (360 / N)° every time the disc rotates one circle, ensuring that the feed cannula can be docked with the syringe every time the hollow outer ring rotates. During the docking process between the feed cannula and the syringe, the rotating hollow tray squeezes the feed cannula and the upper end of the upper seat, causing the upper seat to slide down along the outer wall of the T-tube, and the return spring is compressed until the feed cannula is The bottom end of the tube is located at the injection port. At this time, under the action of the return spring, the upper seat moves up, and the injection port wraps the lower end of the material delivery plug, so that the molten metal can be injected into the T-tube through the material delivery plug. After the injection is completed, as the hollow tray continues to rotate, the material delivery plug and the injection port are squeezed. Similarly, the upper seat moves down and separates from the material delivery plug. It should be noted that a one-way valve can also be set at the lower end of the material delivery plug. During injection, the one-way valve is opened, and when the injection chamber is stopped, that is, when the material delivery plug is separated from the injection port, the one-way valve is closed; S5. Connect the medium one-way inlet pipe on the temporary storage cylinder to an external cold water tank or cold air tank. When the piston moves upward inside the temporary storage cylinder driven by the lifting rod, the one-way valve on the medium one-way inlet pipe opens, and the one-way valve on the medium one-way outlet pipe closes. The medium one-way inlet pipe draws the refrigerant into the temporary storage cylinder for temporary storage. When the lower piston is pressed downward, the one-way valve on the medium one-way inlet pipe closes, and the one-way valve on the medium one-way outlet pipe opens. The refrigerant inside the temporary storage cylinder is transported to the inside of the hollow outer ring through the medium one-way outlet pipe and the connecting pipe, and is transported to the inside of the hollow tray through the connecting hole, and then is transported to the inside of the cooling chamber through the short-circuit support frame, so that the molten metal between the upper mold and the lower mold can be cooled, and the refrigerant after heat exchange is discharged through the lower port of the extended support frame.

[0015] The working principle and beneficial effects of the present invention are: In the present invention, when the transmission mechanism is in operation, the transmission frame on the transmission mechanism can drive the two lifting rods to move up and down reciprocatingly, and can drive the disc to rotate. When the lifting rod drives the upper piston to move up and down reciprocatingly inside the piston tube, the molten metal inside the molten metal barrel can be transported to the syringe through the piston tube, the Y-tube and the material delivery cannula, and then transported to the mold cavity formed between the upper mold and the lower mold through the syringe. In this process, the lifting shaft can drive the rotating disk to move up and down reciprocatingly, and the rotating disk moves up and down on the outer wall of the stirring shaft. The arc-shaped inclined groove on the outer periphery of the rotating disk is pushed by the steering column, which will cause the rotating disk to rotate while moving vertically, thereby driving the stirring shaft to rotate inside the molten metal barrel, stirring and mixing the molten metal inside the molten metal barrel evenly, so that the injection of the molten metal and the stirring and mixing can be coordinated; In the present invention, the disk on the transmission mechanism rotates once, and the hollow outer ring can be pushed and rotated once under the action of the active dial shaft and the driven dial shaft. Assuming that there are N molds in total, the hollow outer ring can rotate (360 / N)° every time the disk rotates once, ensuring that the feed cannula can be docked with the syringe every time the hollow outer ring rotates once. During the docking process of the feed cannula and the syringe, the rotating hollow tray squeezes the feed cannula and the upper end of the upper seat, so that the upper seat slides down along the outer wall of the T-tube, and the return spring is compressed until the feed is delivered. The bottom end of the insert is located at the injection port. At this time, under the action of the return spring, the upper seat moves up, and the injection port wraps the lower end of the feed insert, so that the molten metal can be injected into the T-tube through the feed insert. After the injection is completed, as the hollow tray continues to rotate, the feed insert and the injection port are squeezed. Similarly, the upper seat moves down and separates from the feed insert. The operation is simple and easy to use. During the period of stopping injection, the hollow tray can be linked to rotate, so that different molds can be alternately operated. The degree of automation is high, which greatly improves the work efficiency. In the present invention, in the process of simultaneously driving the injection of molten metal, the stirring and mixing of molten metal, and the rotation and alternation of the mold station by a motor, the lifting rod that moves reciprocatingly up and down can drive the lower piston to move up and down reciprocatingly, so that the medium one-way inlet pipe can suck the refrigerant prepared externally into the temporary storage tube for temporary storage, and can be transported to the inside of the hollow outer ring through the medium one-way outlet pipe and the connecting pipe, and transported to the inside of the hollow tray through the connecting hole, and then transported to the inside of the cooling chamber through the short-circuited support frame, so that the molten metal between the upper mold and the lower mold can be cooled, and the refrigerant after heat exchange is discharged through the lower port of the extended support frame, which has a very high use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the die-casting device for the battery pack shell of a new energy vehicle proposed by the present invention; Figure 2 This is a partial cross-sectional structural schematic diagram of the die-casting device for the battery pack shell of a new energy vehicle proposed by the present invention; Figure 3 for Figure 2 The enlarged structural diagram at A in the middle; Figure 4 This is a schematic diagram of the transmission mechanism structure proposed by the present invention; Figure 5 for Figure 4 The enlarged structural diagram at B in the middle; Figure 6 It is a schematic diagram of a partial cross-sectional structure of the transmission bracket proposed by the present invention; Figure 7 for Figure 6 The enlarged structural diagram at C in the middle; Figure 8 This is a schematic diagram of the cross-sectional structure of the syringe proposed by the present invention; In the figure: 1. Base frame; 2. Refrigerant delivery mechanism; 21. One-way medium inlet pipe; 22. Temporary storage cylinder; 23. One-way medium outlet pipe; 24. Connecting pipe; 3. Transmission mechanism; 31. Lower piston; 32. Lifting rod; 33. Support plate; 34. Limiting plate; 35. Support seat; 36. Upper piston; 37. Linkage component; 371. Disc; 372. Active dial shaft; 373. Connecting shaft; 374. Passive gear; 375. Rotating frame; 376. Fixed column; 377. Transmission frame; 378. Active gear; 379. Motor; 4. Molten metal barrel; 41. Hopper; 42. Electric heating rod; 5. Material feeding mechanism; 51. Material feeding insert; 52. Y-shaped tube; 53. Piston tube; 54. Connecting tube; 6. Mold; 61. Injector; 611. Upper seat; 612. Injection port; 613. Active cavity; 614. Return spring; 615. T-tube; 62. Upper mold; 63. Lower mold; 631. Cooling cavity; 64. Extended support frame; 65. Short-circuited support frame; 7. Transmission bracket; 71. Hollow outer ring; 72. Hollow tray; 73. Driven shift shaft; 74. Support plate; 75. Support platform; 76. Connecting hole; 8. stirring mechanism; 81. steering column; 82. rotating disk; 83. arc-shaped inclined groove; 84. stirring shaft; 85. lifting shaft; 86. opening. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention. Example

[0019] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 as well as Figure 8, a new energy vehicle battery pack shell die-casting device and method, comprising: a base frame 1 and a molten metal barrel 4 arranged above the base frame 1 for storing molten metal, one side of the molten metal barrel 4 is fixedly connected to a hopper 41, and a plurality of electric heating rods 42 are embedded in the inner wall of the molten metal barrel 4, which can be used to keep the material stored in the molten metal barrel 4 warm after power is turned on, and a transmission bracket 7 is arranged on the top of the base frame 1, and the transmission bracket 7 includes a hollow tray 72, and a plurality of molds 6 are distributed in a circular array on the top of the hollow tray 72. A transmission mechanism 3 is arranged on one side of the transmission bracket 7, and the hollow tray 72 can be intermittently rotated by the transmission mechanism 3, so that the mold 6 arranged on the upper side of the hollow tray 72 can be intermittently revolved.

[0020] Specifically, the transmission mechanism 3 includes an upper piston 36, a lower piston 31 and a support seat 35 fixed to the top of the base frame 1 by bolts, the top of the support seat 35 is fixed with a support plate 33, the upper and lower outer walls of the support plate 33 are fixed with a limit plate 34, and the two limit plates 34 are both slidably sleeved with lifting rods 32, the top of one lifting rod 32 is fixed to the upper piston 36, and the bottom of the other lifting rod 32 is fixed to the lower piston 31.

[0021] Furthermore, the transmission mechanism 3 also includes a linkage component 37 arranged on the support plate 33, the linkage component 37 includes a connecting shaft 373 rotatably sleeved inside the support plate 33, the two ends of the connecting shaft 373 are respectively fixedly connected to a disk 371 and a passive gear 374, a plurality of active shafts 372 are fixedly connected to the outer wall of the active shaft 372, a rotating frame 375 is fixedly connected to the outer wall of the passive gear 374, a fixed column 376 is fixedly connected to the outer wall of the rotating frame 375, a transmission frame 377 is slidably sleeved on the outer side of the fixed column 376, the lifting rod 32 is fixedly connected to the transmission frame 377, a motor 379 is fixedly installed inside the support plate 33, and the end of the output shaft of the motor 379 is fixedly connected to a driving gear 378 meshing with the passive gear 374.

[0022] Specifically, the mold 6 includes an extended support frame 64 and a short-circuit support frame 65. The upper ends of the extended support frame 64 and the short-circuit support frame 65 are fixedly connected to a lower mold 63. The upper mold 62 is overlapped at the top of the lower mold 63. An injector 61 is arranged on one side of the top of the upper mold 62. A molding cavity is provided inside the lower mold 63. A cooling cavity 631 is provided inside the lower mold 63 located at the lower side of the molding cavity. The short-circuit support frame 65 and the extended support frame 64 are both connected to the cooling cavity 631. The injector 61 includes a T-tube 615 fixedly connected to the upper mold 62. An upper seat 611 is sleeved on the upper side of the T-tube 615. An active cavity 613 for sliding of the T-tube 615 is provided inside the upper seat 611. A return spring 614 is connected inside the active cavity 613. An injection port 612 connected to the T-tube 615 is provided at the top of the upper seat 611.

[0023] Furthermore, the transmission bracket 7 also includes a support platform 75 fixedly connected to the top of the base frame 1, and the hollow tray 72 is rotatably connected to the top of the support platform 75. A hollow outer ring 71 is rotatably sleeved on the outer periphery of the hollow tray 72, and a support plate 74 for supporting the hollow outer ring 71 is fixedly connected between the hollow outer ring 71 and the base frame 1. A plurality of connecting holes 76 are equidistantly provided on the outer periphery of the hollow tray 72, and the hollow tray 72 and the interior of the hollow outer ring 71 are connected through the connecting holes 76. The lower port of the short-circuit support frame 65 is fixedly connected to the interior of the hollow tray 72, and the extended support frame 64 is fixedly passed through the interior of the hollow tray 72, and the lower end of the extended support frame 64 is in an open state. A plurality of driven shift shafts 73 cooperating with the active shift shaft 372 are distributed in a circular array on the outer side of the top of the hollow tray 72.

[0024] In this embodiment, an appropriate amount of molten metal is stored in the molten metal barrel 4 in advance through the hopper 41, the power is turned on, and the motor 379 is started through the external control device. The motor 379 drives the driving gear 378 to rotate through its output shaft, and the driving gear 378 drives the passive gear 374 to rotate, and the passive gear 374 drives the rotating frame 375 to rotate. When the rotating frame 375 rotates, the transmission frame 377 is pushed through the fixed column 376, so that the transmission frame 377 can drive the two lifting rods 32 to move up and down. At the same time, when the passive gear 374 rotates, it can drive the disc 371 to rotate synchronously through the connecting shaft 373.

[0025] In this embodiment, the disk 371 rotates once, and the hollow outer ring 71 can be pushed and rotated once under the action of the active dial shaft 372 and the driven dial shaft 73. Assuming that the mold 6 is provided with N pieces in total, the hollow outer ring 71 can rotate (360 / N) degrees every time the disk 371 rotates once, ensuring that the feed cannula 51 can be docked with the syringe 61 every time the hollow outer ring 71 rotates once. During the docking process between the feed cannula 51 and the syringe 61, the rotating hollow tray 72 squeezes the feed cannula 51 and the upper end of the upper seat 611, so that the upper seat 611 slides down along the outer wall of the T-tube 615, and the return spring 614 is compressed until the feed cannula 51 is docked with the syringe 61. The bottom end of the feed tube 51 is located at the injection port 612. At this time, under the action of the return spring 614, the upper seat 611 moves upward, and the injection port 612 wraps the lower end of the feed tube 51, so that the molten metal can be injected into the T-tube 615 through the feed tube 51. After the injection is completed, as the hollow tray 72 continues to rotate, the feed tube 51 and the injection port 612 are squeezed. Similarly, the upper seat 611 moves downward and separates from the feed tube 51. It should be noted that a one-way valve can also be set at the lower end of the feed tube 51. During injection, the one-way valve is opened, and when the injection chamber is stopped, that is, when the feed tube 51 is separated from the injection port 612, the one-way valve is closed. Example

[0026] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 , a new energy vehicle battery pack shell die-casting device and method, including all the contents of Example 1, in addition, a stirring mechanism 8 is provided inside the molten metal barrel 4, and the stirring mechanism 8 can be driven by the transmission mechanism 3, so that the molten metal stored inside the molten metal barrel 4 can be stirred and mixed. A feeding mechanism 5 is provided on the lower side of the molten metal barrel 4, and in the process of the transmission mechanism 3 driving the stirring mechanism 8, the molten metal stored inside the molten metal barrel 4 can be transported to the mold 6 through the feeding mechanism 5.

[0027] Specifically, the feeding mechanism 5 includes a piston tube 53 fixedly connected to the bottom of the molten metal barrel 4, the upper piston 36 is slidably sleeved inside the piston tube 53, the lifting rod 32 slides through the bottom end of the piston tube 53, the outer wall of the piston tube 53 is fixedly connected to a Y-tube 52, and both ends of the Y-tube 52 and the piston tube 53 are connected with a one-way valve. The end of the Y-tube 52 away from the piston tube 53 is fixedly connected to a feeding insert 51, and a plurality of connecting tubes 54 connected to the piston tube 53 are fixedly sleeved at the bottom of the molten metal barrel 4, and each connecting tube 54 is provided with a one-way valve.

[0028] Specifically, the stirring mechanism 8 includes a lifting shaft 85 fixedly connected to the top of the upper piston 36, the lifting shaft 85 slides through the bottom of the molten metal barrel 4, the top of the lifting shaft 85 is rotatably connected to a rotating disk 82, a plurality of through openings 86 are opened inside the rotating disk 82, a plurality of stirring shafts 84 are slidably arranged inside the rotating disk 82, a plurality of arc-shaped inclined grooves 83 are opened in a circular array on the outer periphery of the rotating disk 82, and the center axes of the top and bottom ports of two adjacent arc-shaped inclined grooves 83 coincide, and a plurality of steering columns 81 cooperating with the arc-shaped inclined grooves 83 are fixed to the inner wall of the molten metal barrel 4, and the plurality of steering columns 81 are arranged vertically.

[0029] In this embodiment, when the lifting rod 32 drives the upper piston 36 to move back and forth up and down inside the piston tube 53, when the upper piston 36 moves downward, the one-way valve inside the port of the connecting tube 54 opens, and the one-way valve at the port of the Y-tube 52 closes, so that the molten metal stored in the molten metal barrel 4 is sucked into the piston tube 53, and when the upper piston 36 moves upward, the one-way valve inside the port of the connecting tube 54 closes, and the one-way valve at the port of the Y-tube 52 opens, and the molten metal inside the piston tube 53 is transported to the syringe 61 through the Y-tube 52 and the material delivery tube 51, and then transported to the mold cavity formed between the upper mold 62 and the lower mold 63 through the syringe 61.

[0030] In this embodiment, during the up and down reciprocating movement of the upper piston 36, the lifting shaft 85 can drive the rotating disk 82 to reciprocate up and down. The rotating disk 82 moves up and down on the outer wall of the stirring shaft 84. The arc-shaped inclined groove 83 on the outer periphery of the rotating disk 82 is pushed by the steering column 81, which will cause the rotating disk 82 to rotate while moving vertically, thereby driving the stirring shaft 84 to rotate inside the molten metal barrel 4, and stirring and mixing the molten metal inside the molten metal barrel 4 evenly. Example

[0031] See also Figure 1 and Figure 6 , a new energy vehicle battery pack shell die-casting device and method, including all the contents of Example 2. In addition, a refrigerant conveying mechanism 2 is provided on one side of the base frame 1 for storing the refrigerant. The refrigerant stored in the refrigerant conveying mechanism 2 can be conveyed to the mold 6 through the transmission mechanism 3 to cool the mold 6 locally.

[0032] Specifically, the refrigerant delivery mechanism 2 includes a temporary storage cylinder 22 fixedly mounted on the base frame 1, and a medium one-way inlet pipe 21 and a medium one-way outlet pipe 23 are fixedly connected to the bottom of the side wall of the temporary storage cylinder 22. The medium one-way inlet pipe 21 and the medium one-way outlet pipe 23 are both provided with a one-way valve at one end connected to the temporary storage cylinder 22. The medium one-way outlet pipe 23 is connected to the hollow outer ring 71 through a connecting pipe 24, and the lower piston 31 is slidably mounted inside the temporary storage cylinder 22.

[0033] In this embodiment, the medium one-way inlet pipe 21 on the temporary storage tube 22 is connected to an external cold water tank or a cold air tank. When the lifting rod 32 drives the lower piston 31 to move upward inside the temporary storage tube 22, the one-way valve on the medium one-way inlet pipe 21 is opened, and the one-way valve on the medium one-way outlet pipe 23 is closed. The medium one-way inlet pipe 21 draws the refrigerant into the temporary storage tube 22 for temporary storage. When the lower piston 31 is pressed downward, the one-way valve on the medium one-way inlet pipe 21 is closed, and the one-way valve on the medium one-way outlet pipe 23 is opened. The refrigerant inside the temporary storage tube 22 is transported to the inside of the hollow outer ring 71 through the medium one-way outlet pipe 23 and the connecting pipe 24, and is transported to the inside of the hollow tray 72 through the connecting hole 76, and then is transported to the inside of the cooling chamber 631 through the short-circuited support frame 65, so that the molten metal between the upper mold 62 and the lower mold 63 can be cooled, and the refrigerant after heat exchange is discharged through the lower port of the extended support frame 64.

[0034] Working principle and usage process: store an appropriate amount of molten metal in the molten metal barrel 4 through the hopper 41 in advance, turn on the power, start the motor 379 through the external control device, the motor 379 drives the active gear 378 to rotate through its output shaft, the active gear 378 drives the passive gear 374 to rotate, the passive gear 374 drives the rotating frame 375 to rotate, when the rotating frame 375 rotates, the transmission frame 377 is pushed through the fixed column 376, so that the transmission frame 377 can drive the two lifting rods 32 to move up and down, at the same time, when the passive gear 374 rotates, it can drive the disc 371 to rotate synchronously through the connecting shaft 373.

[0035] When the lifting rod 32 drives the upper piston 36 to move up and down reciprocatingly inside the piston tube 53, when the upper piston 36 moves downward, the one-way valve inside the port of the connecting tube 54 opens, and the one-way valve at the port of the Y-tube 52 closes, so that the molten metal stored in the molten metal barrel 4 is sucked into the piston tube 53, and when the upper piston 36 moves upward, the one-way valve inside the port of the connecting tube 54 closes, and the one-way valve at the port of the Y-tube 52 opens, and the molten metal inside the piston tube 53 is transported to the syringe 61 through the Y-tube 52 and the feed tube 51, and then transported to the mold cavity formed between the upper mold 62 and the lower mold 63 through the syringe 61.

[0036] During the up and down reciprocating movement of the upper piston 36, the lifting shaft 85 can drive the rotating disk 82 to reciprocate up and down. The rotating disk 82 moves up and down on the outer wall of the stirring shaft 84. The arc-shaped inclined groove 83 on the outer periphery of the rotating disk 82 is pushed by the steering column 81, which will cause the rotating disk 82 to rotate while moving vertically, thereby driving the stirring shaft 84 to rotate inside the molten metal barrel 4, and stirring and mixing the molten metal inside the molten metal barrel 4 evenly.

[0037] Every time the disc 371 rotates one circle, the hollow outer ring 71 can be pushed and rotated once under the action of the active dial shaft 372 and the driven dial shaft 73. Assuming that the mold 6 is provided with N pieces in total, the hollow outer ring 71 can rotate (360 / N)° every time the disc 371 rotates one circle, ensuring that the feed cannula 51 can be docked with the syringe 61 every time the hollow outer ring 71 rotates once. During the docking process of the feed cannula 51 and the syringe 61, the rotating hollow tray 72 squeezes the feed cannula 51 and the upper end of the upper seat 611, so that the upper seat 611 slides down along the outer wall of the T-tube 615, and the return spring 614 is compressed until the feed cannula 51 is docked with the syringe 61. The bottom end of 51 is located at the injection port 612. At this time, under the action of the return spring 614, the upper seat 611 moves up, and the injection port 612 wraps the lower end of the material delivery plug 51, so that the molten metal can be injected into the T-tube 615 through the material delivery plug 51. After the injection is completed, as the hollow tray 72 continues to rotate, the material delivery plug 51 and the injection port 612 are squeezed. Similarly, the upper seat 611 moves down and separates from the material delivery plug 51. It should be noted that a one-way valve can also be set at the lower end of the material delivery plug 51. When injecting, the one-way valve is opened. When the injection chamber is stopped, that is, when the material delivery plug 51 is separated from the injection port 612, the one-way valve is closed. The injection port 612 can also be blocked or pressurized by a prepared piston.

[0038] The medium one-way inlet pipe 21 on the temporary storage tube 22 is connected to an external cold water tank or cold air tank. When the lifting rod 32 drives the lower piston 31 to move upward inside the temporary storage tube 22, the one-way valve on the medium one-way inlet pipe 21 opens, and the one-way valve on the medium one-way outlet pipe 23 closes. The medium one-way inlet pipe 21 draws the refrigerant into the temporary storage tube 22 for temporary storage. When the lower piston 31 is pressed downward, the one-way valve on the medium one-way inlet pipe 21 closes, and the one-way valve on the medium one-way outlet pipe 23 opens. The refrigerant inside the temporary storage tube 22 is transported to the inside of the hollow outer ring 71 through the medium one-way outlet pipe 23 and the connecting pipe 24, and is transported to the inside of the hollow tray 72 through the connecting hole 76, and then is transported to the inside of the cooling chamber 631 through the short-circuited support frame 65, so that the molten metal between the upper mold 62 and the lower mold 63 can be cooled, and the refrigerant after heat exchange is discharged through the lower port of the extended support frame 64.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. New energy vehicle battery pack shell die-casting device, including: A base frame (1) and a molten metal barrel (4) arranged above the base frame (1) for storing molten metal, wherein one side of the molten metal barrel (4) is fixedly connected to a hopper (41), and a plurality of electric heating rods (42) are embedded in the inner wall of the molten metal barrel (4), characterized in that a transmission bracket (7) is arranged on the top of the base frame (1), and the transmission bracket (7) includes a hollow tray (72), and a plurality of molds (6) are distributed in a circular array on the top of the hollow tray (72); A transmission mechanism (3) is provided on one side of the transmission bracket (7), and the transmission mechanism (3) can intermittently rotate the hollow tray (72), thereby intermittently revolving the mold (6) disposed on the upper side of the hollow tray (72); A refrigerant conveying mechanism (2) is provided on one side of the base frame (1) for storing refrigerant, and the refrigerant stored in the refrigerant conveying mechanism (2) can be conveyed to the mold (6) through the transmission mechanism (3) to cool a part of the mold (6); A stirring mechanism (8) is arranged inside the molten metal barrel (4), and the stirring mechanism (8) can be driven by the transmission mechanism (3), so that the molten metal stored inside the molten metal barrel (4) can be stirred and mixed; A feeding mechanism (5) is provided at the lower side of the molten metal barrel (4). When the transmission mechanism (3) drives the stirring mechanism (8), the molten metal stored in the molten metal barrel (4) can be transported to the mold (6) through the feeding mechanism (5).

2. The die-casting device for the battery pack shell of a new energy vehicle according to claim 1, characterized in that: The transmission mechanism (3) comprises an upper piston (36), a lower piston (31) and a support seat (35) fixed to the top of the base frame (1) by bolts, the top of the support seat (35) is fixedly connected to a support plate (33), the upper and lower outer walls of the support plate (33) are fixedly connected to a limit plate (34), and lifting rods (32) are slidably sleeved inside the two limit plates (34), the top of one of the lifting rods (32) is fixedly connected to the upper piston (36), and the bottom of the other lifting rod (32) is fixedly connected to the lower piston (31).

3. The die-casting device for the battery pack shell of a new energy vehicle according to claim 2, characterized in that: The transmission mechanism (3) further comprises a linkage component (37) arranged on the support plate (33), the linkage component (37) comprising a connecting shaft (373) rotatably sleeved inside the support plate (33), the two ends of the connecting shaft (373) being respectively fixedly connected to a disk (371) and a passive gear (374), a plurality of active shifting shafts (372) being fixedly connected to the outer wall of the active shifting shaft (372), a rotating frame (375) being fixedly connected to the outer wall of the passive gear (374), a fixing column (376) being fixedly connected to the outer wall of the rotating frame (375), a transmission frame (377) being slidably sleeved outside the fixing column (376), the lifting rod (32) being fixedly connected to the transmission frame (377), a motor (379) being fixedly installed inside the support plate (33), and a driving gear (378) meshing with the passive gear (374) being fixedly connected to the end of the output shaft of the motor (379).

4. The die-casting device for the battery pack shell of a new energy vehicle according to claim 3, characterized in that: The feeding mechanism (5) comprises a piston tube (53) fixedly connected to the bottom of the molten metal barrel (4); the upper piston (36) is slidably sleeved inside the piston tube (53); the lifting rod (32) slides through the bottom end of the piston tube (53); the outer wall of the piston tube (53) is fixedly connected to a Y-shaped tube (52); both ends of the Y-shaped tube (52) connected to the piston tube (53) are provided with one-way valves; one end of the Y-shaped tube (52) away from the piston tube (53) is fixedly connected to a feeding insert (51); a plurality of connecting tubes (54) connected to the piston tube (53) are fixedly sleeved at the bottom of the molten metal barrel (4); each connecting tube (54) is provided with a one-way valve.

5. The die-casting device for the battery pack shell of a new energy vehicle according to claim 4, characterized in that: The stirring mechanism (8) comprises a lifting shaft (85) fixedly connected to the top end of the upper piston (36), the lifting shaft (85) slidingly passing through the bottom of the molten metal barrel (4), the top end of the lifting shaft (85) being rotatably connected to a rotating disk (82), a plurality of through openings (86) being opened inside the rotating disk (82), a plurality of stirring shafts (84) being slidably opened inside the rotating disk (82), a plurality of arc-shaped inclined grooves (83) being opened in an annular array on the outer periphery of the rotating disk (82), the center axes of the top and bottom ports of two adjacent arc-shaped inclined grooves (83) being coincident, a plurality of steering columns (81) cooperating with the arc-shaped inclined grooves (83) being fixedly connected to the inner wall of the molten metal barrel (4), the plurality of steering columns (81) being arranged vertically.

6. The die-casting device for the battery pack shell of a new energy vehicle according to claim 5, characterized in that: The mold (6) comprises an extended support frame (64) and a short-circuit support frame (65); the upper ends of the extended support frame (64) and the short-circuit support frame (65) are fixedly connected to a lower mold (63); the top of the lower mold (63) is overlapped with an upper mold (62); a syringe (61) is arranged on one side of the top of the upper mold (62); a molding cavity is provided inside the lower mold (63); a cooling cavity (631) is provided inside the lower mold (63) located at the lower side of the molding cavity; and the short-circuit support frame (65) and the extended support frame (64) are both connected to the cooling cavity (631).

7. The die-casting device for the battery pack shell of a new energy vehicle according to claim 6, characterized in that: The transmission bracket (7) further comprises a support platform (75) fixedly connected to the top of the base frame (1); the hollow tray (72) is rotatably connected to the top of the support platform (75); a hollow outer ring (71) is rotatably sleeved on the outer circumference of the hollow tray (72); a support plate (74) for supporting the hollow outer ring (71) is fixedly connected between the hollow outer ring (71) and the base frame (1); a plurality of communication holes (76) are equidistantly provided on the outer circumference of the hollow tray (72); The connecting hole (76) connects the hollow tray (72) and the interior of the hollow outer ring (71); the lower port of the short-circuit support frame (65) is fixedly connected to the interior of the hollow tray (72); the extended support frame (64) is fixedly inserted into the interior of the hollow tray (72); and the lower end of the extended support frame (64) is in an open state; and a plurality of driven shifting shafts (73) cooperating with the active shifting shaft (372) are distributed in a circular array on the outer side of the top end of the hollow tray (72).

8. The die-casting device for the battery pack shell of a new energy vehicle according to claim 7, characterized in that: The syringe (61) comprises a T-shaped tube (615) fixedly connected to the interior of the upper mold (62); an upper seat (611) is sleeved on the upper side of the T-shaped tube (615); a movable cavity (613) for sliding of the T-shaped tube (615) is provided inside the upper seat (611); a return spring (614) is connected to the inner side of the movable cavity (613); and an injection port (612) connected to the T-shaped tube (615) is provided at the top end of the upper seat (611).

9. The die-casting device for the battery pack shell of a new energy vehicle according to claim 8, characterized in that: The refrigerant delivery mechanism (2) comprises a temporary storage cylinder (22) fixedly sleeved on the base frame (1); a medium one-way inlet pipe (21) and a medium one-way outlet pipe (23) are fixedly connected at the bottom of the side wall of the temporary storage cylinder (22); one end of the medium one-way inlet pipe (21) and the medium one-way outlet pipe (23) connected to the temporary storage cylinder (22) are both provided with a one-way valve; the medium one-way outlet pipe (23) and the hollow outer ring (71) are connected via a connecting pipe (24); and the lower piston (31) is slidably sleeved inside the temporary storage cylinder (22).

10. A method for die-casting a battery pack shell for a new energy vehicle, using a die-casting device for a battery pack shell for a new energy vehicle as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Pre-store an appropriate amount of molten metal in the molten metal barrel (4) through the hopper (41), turn on the power, start the motor (379) through the external control device, the motor (379) drives the driving gear (378) to rotate through its output shaft, the driving gear (378) drives the driven gear (374) to rotate, the driven gear (374) drives the rotating frame (375) to rotate, and when the rotating frame (375) rotates, the fixed column (376) pushes the transmission frame (377), so that the transmission frame (377) can drive the two lifting rods (32) to move up and down reciprocatingly, and at the same time, when the driven gear (374) rotates, it can drive the disc (371) to rotate synchronously through the connecting shaft (373); S2, when the lifting rod (32) drives the upper piston (36) to move up and down reciprocatingly inside the piston tube (53), when the upper piston (36) moves downward, the one-way valve inside the port of the connecting tube (54) opens, and the one-way valve at the port of the Y-shaped tube (52) closes, so that the molten metal stored in the molten metal barrel (4) is sucked into the piston tube (53), and when the upper piston (36) moves upward, the one-way valve inside the port of the connecting tube (54) closes, and the one-way valve at the port of the Y-shaped tube (52) opens, and the molten metal inside the piston tube (53) is transported to the syringe (61) through the Y-shaped tube (52) and the material delivery tube (51), and then transported to the mold cavity formed between the upper mold (62) and the lower mold (63) through the syringe (61); S3. During the up-and-down reciprocating movement of the upper piston (36), the lifting shaft (85) can drive the rotating disk (82) to reciprocate up and down. The rotating disk (82) moves up and down on the outer wall of the stirring shaft (84). The arc-shaped inclined groove (83) on the outer periphery of the rotating disk (82) is pushed by the steering column (81), so that the rotating disk (82) rotates while moving vertically, thereby driving the stirring shaft (84) to rotate inside the molten metal barrel (4), and stirring and mixing the molten metal inside the molten metal barrel (4) uniformly. S4. Every time the disk (371) rotates one circle, the hollow outer ring (71) can be pushed and rotated once under the action of the active dial shaft (372) and the driven dial shaft (73). Assuming that the mold (6) is provided with N pieces in total, the hollow outer ring (71) can rotate (360 / N) degrees every time the disk (371) rotates one circle, ensuring that the feed cannula (51) can be docked with the syringe (61) every time the hollow outer ring (71) rotates once. During the docking process of the feed cannula (51) and the syringe (61), the rotating hollow tray (72) causes the feed cannula (51) to be squeezed with the upper end of the upper seat (611), so that the upper seat (611) slides down along the outer wall of the T-tube (615), and the return spring (614) is compressed until The bottom end of the feed pipe (51) is located at the injection port (612). At this time, under the action of the return spring (614), the upper seat (611) moves upward, and the injection port (612) wraps the lower end of the feed pipe (51), so that molten metal can be injected into the T-tube (615) through the feed pipe (51). After the injection is completed, as the hollow tray (72) continues to rotate, the feed pipe (51) and the injection port (612) are squeezed. Similarly, the upper seat (611) moves downward and separates from the feed pipe (51). It should be noted that a one-way valve can also be provided at the lower end of the feed pipe (51). During injection, the one-way valve is opened, and when the injection chamber is stopped, that is, when the feed pipe (51) and the injection port (612) are separated, the one-way valve is closed. S5. Connect the medium one-way inlet pipe (21) on the temporary storage cylinder (22) to an external cold water tank or cold air tank. When the lifting rod (32) drives the lower piston (31) to move upward inside the temporary storage cylinder (22), the one-way valve on the medium one-way inlet pipe (21) opens, and the one-way valve on the medium one-way outlet pipe (23) closes. The medium one-way inlet pipe (21) draws the refrigerant into the temporary storage cylinder (22) for temporary storage. When the lower piston (31) is pressed downward, the one-way valve on the medium one-way inlet pipe (21) closes, and the medium The one-way valve on the medium one-way outlet pipe (23) is opened, and the refrigerant inside the temporary storage tube (22) is transported to the inside of the hollow outer ring (71) through the medium one-way outlet pipe (23) and the connecting pipe (24), and is transported to the inside of the hollow tray (72) through the connecting hole (76), and then transported to the inside of the cooling chamber (631) through the short-circuited support frame (65), so that the molten metal between the upper mold (62) and the lower mold (63) can be cooled, and the refrigerant after heat exchange is discharged through the lower port of the extended support frame (64).

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