A casting mold for metal parts of new energy vehicles

Abstract

The application discloses a kind of casting mould for new energy automobile metal parts, it is related to casting mould technical field, and its technical solution key points are: preparation automobile transmission sprocket is with powder metallurgy forming mould, it includes: cover, its inside is equipped with outer sleeve, the outer surface of the outer sleeve is equipped with helical first guide groove;Upper die assembly, it includes the first connecting shaft sleeve that can be axially moved and is arranged in the outer sleeve and the connecting block that is arranged outside the outer sleeve, by single motor drive screw rod, integrated control spiral lifting of upper die, transverse movement and station switching of lower die, and on-line cleaning and lubrication of upper die, three upper dies and the cyclic alternation work mechanism of double-station lower die, so that moulding, mould cavity rotation, mould maintenance and other processes can be automatically and continuously carried out, greatly reduce the intermittent waiting and manual intervention time in traditional operation, effectively improve production rhythm and automation level.

Description

Technical Field

[0001] This invention relates to the field of casting mold technology, and more specifically, to a casting mold for metal parts of new energy vehicles. Background Technology

[0002] The lightweight and high-strength structural requirements of new energy vehicles have led to the increasingly widespread application of precision metal castings such as aluminum alloys and magnesium alloys. These parts are usually formed in special molds through processes such as pressure casting and extrusion casting. The precision, efficiency and lifespan of the molds are directly related to the quality of the products and the production costs.

[0003] Existing metal casting molds typically employ a single upper and lower mold pairing. In one molding cycle, the upper mold closes with the fixed lower mold under the action of a drive device. After the molten metal is formed and cooled in the cavity, the mold is opened and the part is removed. Subsequently, the mold needs to undergo necessary cleaning, spraying of release agent, and natural cooling before the next cycle can begin. The entire process involves significant intermittent waiting time.

[0004] The single-station, intermittent working mode means that production efficiency is mainly limited by the cooling and auxiliary processing time of the mold, making it difficult to achieve continuous and efficient automated production. Especially in the case of high-speed mass production, the cooling and maintenance time of the mold becomes the main bottleneck restricting the increase in production capacity. Its heat load is concentrated and lacks the opportunity for rotational heat dissipation. In order to prevent overheating damage, the cycle has to be extended, resulting in a slow production pace.

[0005] Therefore, in order to solve the above-mentioned technical problems, this application proposes a casting mold for metal parts of new energy vehicles. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a casting mold for metal parts of new energy vehicles.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a powder metallurgy forming mold for preparing automotive transmission sprockets, comprising:

[0008] The outer cover has an inner outer sleeve, and the outer surface of the outer sleeve has a spiral-shaped first guide groove.

[0009] The upper mold assembly includes a first connecting bushing axially movable inside the outer sleeve and a connecting block disposed outside the outer sleeve. The first connecting bushing is connected to a third connecting shaft that passes through the first guide groove and is connected to the connecting block. The connecting block is provided with a plurality of upper molds.

[0010] A lead screw is rotatably disposed inside the outer cover and threadedly connected to the first connecting bushing. The rotational movement of the lead screw drives the first connecting bushing to move axially, and then, through the cooperation of the third connecting shaft and the first guide groove, drives the multiple upper dies to rise and fall along a spiral trajectory.

[0011] The lower die is laterally movable inside the outer cover and is connected to the lead screw drive, so that the rotational motion of the lead screw can be converted into the lateral movement of the lower die. The lower die is provided with at least two mold cavities.

[0012] A transmission mechanism is connected between the lead screw and the lower die. The rotation of the lead screw selectively drives the lower die to move laterally, so as to alternately move its different mold cavities into the mold closing position corresponding to the upper die.

[0013] The plurality of upper dies circulate under the drive of the lead screw, such that when one upper die closes with the mold cavity at the mold closing station, the other upper dies are in different preparation or maintenance positions.

[0014] Preferably, the outer surface of the outer sleeve is provided with a plurality of vertical second guide grooves, each of the second guide grooves being alternately connected with the spiral first guide groove to form a closed-loop path for the movement of the third connecting shaft.

[0015] Preferably, a trajectory control component is provided at the bottom outlet of the first guide groove and at the intersection with the second guide groove;

[0016] The trajectory control component includes a first stop and a second stop that are rotatably disposed, and a first limit block, a second limit block and a third limit block that constrain the swing angle of the first stop and the second stop;

[0017] During its movement, the third connecting shaft contacts the first and second stops and pushes them to rotate, thereby switching the movement path of the third connecting shaft between the first guide groove and the second guide groove.

[0018] Preferably, the transmission mechanism includes a second base plate that is axially slidable, and the lower mold is supported on the second base plate;

[0019] The second base plate is connected to the lead screw via a threaded pair, so that the rotation of the lead screw can drive the second base plate and the lower die to move up and down along the axial direction of the lead screw.

[0020] Preferably, the transmission mechanism further includes a gear set connected to the lead screw and a rack connected to the lower die;

[0021] When the second base plate is raised or lowered to the set position, the rotation of the lead screw drives the rack through the gear set, thereby causing the lower mold to move laterally relative to the second base plate.

[0022] Preferably, the gear set includes a drive mechanism rotatably mounted on the lead screw, and a third gear and a fifth gear respectively meshing with the drive mechanism;

[0023] The third gear and the fifth gear are respectively provided with a fourth gear and a sixth gear that intermittently mesh with the rack;

[0024] The lateral movement direction of the lower die is determined by the fourth and sixth gears currently meshing with the rack.

[0025] Preferably, a maintenance station is also provided at the bottom of the inner cavity of the outer cover, surrounding the mold closing station of the lower mold;

[0026] The maintenance station includes a cleaning station and a spraying station. When the upper mold moves to the cleaning station or the spraying station, the surface cleaning or lubricant spraying operation is performed respectively.

[0027] Preferably, the cleaning station is equipped with a cleaning device made of flexible material, and the upper mold that moves to the station contacts the cleaning device to wipe its surface.

[0028] Preferably, the spraying station is provided with a second connecting groove that communicates with an external atomizing oil spraying device. The upper mold that moves to the station engages with the top of the second connecting groove, and the oil mist sprayed by the atomizing oil spraying device is guided by the second connecting groove and covers the surface of the upper mold.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In this invention, a single motor drives a lead screw to control the spiral lifting of the upper mold, the lateral movement and station switching of the lower mold, as well as the online cleaning and lubrication of the upper mold. The cyclical alternation mechanism of the three upper molds and the dual-station lower mold enables the automatic and continuous execution of processes such as mold closing and forming, mold cavity rotation, and mold maintenance. This significantly reduces the intermittent waiting time and manual intervention time in traditional operations, and effectively improves the production cycle and automation level.

[0031] 2. In this invention, by setting three upper molds to work in cycles, each upper mold can obtain a cooling and lubrication interval after each working cycle. The alternating working design of the dual mold cavities of the lower mold also provides natural heat dissipation time for the mold cavity. This rotation mechanism, combined with automatic oil spraying lubrication, evenly disperses the heat load and mechanical wear, effectively avoiding early failure of the mold due to local overheating or continuous friction, thereby significantly extending the overall service life of the core molding components.

[0032] 3. In this invention, the upper mold assembly is precisely matched with the guide shaft and the spiral groove, and is forcibly guided by the trajectory control mechanism composed of the flip-up stop and the limit block. This ensures that each upper mold strictly follows the fixed path of "spiral downward - straight upward" in a cycle, with accurate positioning. The lower mold is driven by the gear-rack and incomplete gear mechanism, with accurate transfer positioning. The coordinated action of the two ensures the repeatability accuracy of the mold closing position each time, and improves the consistency and stability of the product molding quality.

[0033] 4. In this invention, a cleaning and oil spraying station is integrated into the working cycle of the mold. When the upper mold is not in the working position, it can automatically complete the surface debris wiping and protective oil film spraying. This not only realizes the preventive maintenance of the mold and keeps it in good working condition, but also the oil spraying process is carried out in the relatively closed second connecting groove, which effectively prevents the spread of oil mist, improves the cleanliness of the working environment, and reduces maintenance costs and environmental pollution risks. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0035] Figure 1 This is a schematic diagram of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of the outer cover in this invention.

[0037] Figure 3 This is a schematic diagram of the bottom structure of the outer cover in this invention;

[0038] Figure 4 This is a schematic diagram of the outer sleeve structure in this invention;

[0039] Figure 5 This is a schematic diagram of the upper mold assembly in this invention;

[0040] Figure 6 This is a schematic diagram of the installation of the lead screw and the second base plate in this invention;

[0041] Figure 7 This is a schematic diagram of the lead screw structure in this invention;

[0042] Figure 8 This is a schematic diagram of the drive mechanism in this invention;

[0043] Figure 9 This is a schematic diagram of the structure of the second base plate in this invention;

[0044] Figure 10 This is a schematic diagram of the lower mold structure in this invention;

[0045] Figure 11This is a schematic diagram of the structure of the first transmission mechanism in this invention;

[0046] Figure 12 This is a schematic diagram of the structure of the second transmission mechanism in this invention;

[0047] Figure 13 This is a schematic diagram showing the connection between the lower mold and the rack in this invention;

[0048] Figure 14 This is a schematic diagram of the rightward movement of the lower mold in this invention;

[0049] Figure 15 This is a schematic diagram of the leftward movement of the lower mold in this invention.

[0050] 1. Outer cover; 11. First connecting hole; 12. Limiting groove; 13. First base plate; 14. Nozzle; 15. First mounting groove; 16. First connecting shaft; 17. Second connecting shaft; 18. First connecting groove;

[0051] 2. Outer sleeve; 21. First guide groove; 22. Second guide groove; 23. First stop block; 24. First limiting block; 25. Second stop block; 26. Second limiting block; 27. Third limiting block;

[0052] 3. Lead screw; 31. First external thread groove; 32. Drive mechanism; 321. Drive wheel; 322. First gear; 323. Second gear; 33. Idler gear; 34. Second external thread groove; 35. Limiting bushing;

[0053] 4. Electric motor;

[0054] 5. Upper mold assembly; 51. First connecting bushing; 52. Connecting block; 53. Third connecting shaft; 54. Threaded hole; 55. Upper mold; 56. Guide hole;

[0055] 6. Lower mold; 61. Rack; 62. First transmission mechanism; 621. Third gear; 622. Fourth gear; 63. Second transmission mechanism; 631. Fifth gear; 632. Sixth gear;

[0056] 7. Second mounting slot;

[0057] 8. Cleaning device;

[0058] 9. Second connecting slot;

[0059] 10. Second base plate; 101. Second connecting hole; 102. Mounting bushing; 103. Seventh gear; 104. Second connecting bushing. Detailed Implementation

[0060] like Figure 1-15As shown, the present invention provides a casting mold for metal parts of new energy vehicles, including an outer cover 1 installed on a workbench and an outer sleeve 2 disposed inside therein. The outer surface of the outer sleeve 2 is formed with a vertically inclined downward guide trajectory. The upper mold assembly 5 is disposed in the inner cavity of the outer cover 1 and is provided with a guide mechanism that matches the guide trajectory. The guide mechanism passes through the outer sleeve 2 and extends into its inner cavity.

[0061] A motor 4 that generates rotational power is installed at the top center of the outer cover 1. A lead screw 3 is provided in the inner cavity of the outer sleeve 2. The lead screw 3 is connected to the output shaft of the motor 4 and rotates together with the output shaft. The guide mechanism of the upper mold assembly 5 is connected to the lead screw 3 by a thread and, under the constraint of the vertically inclined downward guide trajectory of the outer sleeve 2, drives the upper mold assembly 5 to move up and down along the trajectory.

[0062] The outer cover 1 is also provided with a lower mold 6. The lower mold 6 is connected to the lead screw 3 through a reversing device, so that the rotational motion of the lead screw 3 is converted into the lateral movement of the lower mold 6 in the inner cavity of the outer cover 1. The position of the lower mold 6 corresponds to the upper mold assembly 5. When the upper mold assembly 5 descends along an inclined downward trajectory, it closes with the lower mold 6 after the lateral movement, and together they perform mold closing, shaping and forming of the metal part.

[0063] like Figure 1-5 As shown, the outer cover 1 is generally hollow cylindrical in shape, with an opening on its circumferential side wall that leads to the inner cavity of the outer cover 1.

[0064] A first connecting hole 11 is provided at the top center of the outer cover 1, and the first connecting hole 11 penetrates the top wall and bottom wall of the outer cover 1 in a vertical direction;

[0065] The upper end of the lead screw 3 is inserted into the first connecting hole 11 at the top of the inner cavity of the outer cover 1, and its lower end is inserted into and extends downward through the first connecting hole 11 at the bottom of the inner cavity. A first external thread groove 31 is provided on the outer circumferential outer wall of the lead screw 3, and the first external thread groove 31 is provided in the inner cavity of the outer sleeve 2.

[0066] The motor 4 is fixed to the top of the outer cover 1 by bolts, and its output axis passes downward into the first connecting hole 11 and is detachably connected to the top of the lead screw 3, so that the lead screw 3 can rotate around its axis.

[0067] In the inner cavity of the outer cover 1, a limiting groove 12 is provided at the position facing the opening, which penetrates through its bottom wall. The bottom of the lower mold 6 is inserted into the limiting groove 12 and extends downward. The groove wall of the limiting groove 12 constrains the lower mold 6, so that it can only move horizontally along the length direction of the limiting groove 12.

[0068] The outer sleeve 2 is detachably connected to the top and bottom of the inner cavity of the outer cover 1 through the flange structure at both ends, thereby being vertically fixed inside the outer cover 1;

[0069] Three first guide grooves 21 that communicate with the inner cavity of the outer sleeve 2 are machined on the outer circumferential outer wall. Each first guide groove 21 extends downward along the circumferential curved surface of the outer sleeve 2, forming a spiral trajectory. In addition, three second guide grooves 22 that communicate with the inner cavity of the outer sleeve 2 are also provided on the outer wall of the outer sleeve 2. Each second guide groove 22 connects two adjacent first guide grooves 21 in the vertical direction.

[0070] The upper mold assembly 5 includes a first connecting bushing 51 and a connecting block 52;

[0071] The first connecting bushing 51 is sleeved on the outside of the lead screw 3, and a threaded hole 54 is opened at the center of its top, which is vertically penetrating itself. Through the threaded hole 54, a threaded engagement relationship is formed with the first external thread groove 31 on the lead screw 3.

[0072] The top threaded hole 54 of the first connecting bushing 51 has guide holes 56 that penetrate vertically through it on both sides. The inner cavity of the outer sleeve 2 is provided with guide pins that match the guide holes 56 along the axial direction of the outer sleeve 2. The upper end of the guide pin is detachably connected to the top of the inner cavity of the outer cover 1, and the lower end is detachably connected to the bottom of the inner cavity of the outer cover 1. The cooperation with the guide holes 56 can constrain the circumferential movement of the first connecting bushing 51 so that the first connecting bushing 51 can only move along the axial direction of the outer sleeve 2.

[0073] The first connecting bushing 51 is housed in the inner cavity of the outer sleeve 2, and its outer circumferential wall is in contact with the inner wall of the outer sleeve 2.

[0074] On the outer circumferential wall of the first connecting sleeve 51, three third connecting shafts 53 are detachably installed by bearings. The three third connecting shafts 53 correspond one-to-one with the three first guide grooves 21 on the outer sleeve 2. The end of each third connecting shaft 53 away from the first connecting sleeve 51 extends outward horizontally, passes through the corresponding first guide groove 21 in sequence, and is detachably connected to the inner wall of the connecting block 52 sleeved on the outside of the outer sleeve 2.

[0075] On the outer circumferential wall of the connecting block 52, at positions corresponding to each third connecting shaft 53, there are protrusions extending horizontally away from the outer sleeve 2, and an upper mold 55 can be detachably installed at the end of each protrusion.

[0076] When the device is working, the motor 4 and the lead screw 3 rotate. Since the first connecting sleeve 51 is engaged with the first guide groove 21 on the outer sleeve 2 through the third connecting shaft 53 on it, the engagement relationship constrains the first connecting sleeve 51, preventing it from rotating with the lead screw 3. Under the threaded engagement drive of the lead screw 3 and the first connecting sleeve 51, the first connecting sleeve 51 will move along the axial direction of the outer sleeve 2.

[0077] The third connecting shaft 53 moves along the first guide groove 21, thereby converting the axial linear motion of the first connecting shaft sleeve 51 into the trajectory motion of the third connecting shaft 53 along the spiral first guide groove 21. By changing the rotation direction of the lead screw 3, the axial movement direction of the first connecting shaft sleeve 51 can be changed.

[0078] The first connecting sleeve 51 drives the external connecting block 52 and the upper mold 55 mounted on it to move synchronously through three third connecting shafts 53, so that the upper mold 55 moves up and down along the spiral guide trajectory on the surface of the outer sleeve 2.

[0079] The lower mold 6 is connected to the lead screw 3 through a reversing device. When the lead screw 3 rotates, the reversing device converts its rotational motion into linear motion of the lower mold 6 along the horizontal limiting groove 12. Through the coordination of structural design and motion timing, when the upper mold 55 descends to the forming station along the spiral trajectory, the lower mold 6 also moves laterally to the corresponding position. Together, they complete the mold closing, shaping and forming operations of the metal part.

[0080] like Figure 1-3 and Figure 6-15 As shown, a first mounting groove 15 is machined at the bottom center of the outer cover 1. Two first connecting shafts 16 arranged side by side and a second connecting shaft 17 located diagonally below one of the first connecting shafts 16 are integrally formed in the first mounting groove 15.

[0081] The bottom of the outer cover 1 is provided with a first connecting groove 18 at the position corresponding to the limiting groove 12. The first connecting groove 18 is vertically connected to the limiting groove 12, and its shape is fan-shaped. It is connected to the area where the two first connecting shafts 16 are located. The bottom of the lower mold 6 passes through the limiting groove 12 and the first connecting groove 18 in sequence.

[0082] The bottom of the outer cover 1 is detachably fitted with a first base plate 13 to close the first mounting groove 15 and the first connecting groove 18;

[0083] The bottom end of the lead screw 3 passes downward through the first connecting hole 11 at the bottom of the outer cover 1 and then extends into the inner cavity of the first mounting groove 15;

[0084] The lead screw 3 has two threads on its body. The first external thread groove 31 is located at the upper part and engages with the threaded hole 54 of the first connecting bushing 51. The second external thread groove 34 is located at the lower part and is set in the first mounting groove 15.

[0085] A drive mechanism 32 is also mounted on the body of the lead screw 3 via a bearing. The drive mechanism 32 is located between the first external thread groove 31 and the second external thread groove 34. The area where the top surface of the inner cavity of the first mounting groove 15 contacts the drive mechanism 32 is set as a rough surface to increase friction and thus prevent the lead screw 3 from rotating together with the drive mechanism 32.

[0086] The drive mechanism 32 includes a drive wheel 321, which is rotatably connected to the lead screw 3 via a bearing. A first gear 322 is integrally formed on the top surface of the drive wheel 321. The top surface of the first gear 322 is rough and contacts the rough top wall of the first mounting groove 15 to prevent it from rotating around the lead screw axis. A second gear 323 is integrally formed on the bottom surface of the drive wheel 321.

[0087] The side of the first gear 322 meshes with the idler gear 33, which is mounted on the second connecting shaft 17 via a bearing and can rotate around it.

[0088] At the lowest end of the lead screw 3, a limiting bushing 35 is installed via a bearing. The limiting bushing 35 is located below the second external thread groove 34 and is detachably connected to the first base plate 13 for axial positioning of the lead screw 3.

[0089] The first connecting groove 18 is fitted with a fan-shaped second base plate 10. The side wall of the second base plate 10 is integrally formed with a second connecting hole 101 corresponding to the position of the first connecting shaft 16. The second connecting hole 101 is sleeved on the first connecting shaft 16, so that the second base plate 10 can slide along the axial direction of the first connecting shaft 16, while its circumferential rotation is constrained.

[0090] The second base plate 10 has an integrally formed mounting bushing 102 and a second connecting bushing 104 located below it at the end facing the lead screw 3. The second connecting bushing 104 has an internal thread that meshes with the second external thread groove 34 on the lead screw 3.

[0091] The seventh gear 103 is mounted inside the mounting sleeve 102 via bearings. The seventh gear 103 is connected to the lead screw 3 via a spline or flat key, so that the lead screw 3 can drive the seventh gear 103 to rotate inside the mounting sleeve 102. The seventh gear 103 and the mounting sleeve 102 can rotate relative to each other, and the top surface of the seventh gear 103 is basically flush with the top surface of the mounting sleeve 102.

[0092] The bottom surface of the lower mold 6 contacts the top surface of the second base plate 10 and is supported by the second base plate 10. To reduce friction, ball bearings are provided between the top surface of the second base plate 10 and the bottom surface of the lower mold 6. The top surface of the lower mold 6 has two mold cavities.

[0093] A rack 61 is detachably mounted on the side of the lower die 6 facing the lead screw 3. The rack 61 is arranged along the length of the lower die 6 and is located in the first connecting groove 18. The teeth of the rack 61 are divided into two sections, which correspond to the two cavities on the lower die 6 respectively.

[0094] The transmission between the lower die 6 and the lead screw 3 is achieved by the first transmission mechanism 62 and the second transmission mechanism 63. These two transmission mechanisms are respectively mounted on the two first connecting shafts 16 through bearings, distributed on both sides of the drive mechanism 32, and connected to the rack 61.

[0095] The first transmission mechanism 62 includes a third gear 621 and a fourth gear 622 fixed on the same axis. The third gear 621 is a full-tooth gear that is constantly meshed with the first gear 322 of the drive mechanism 32. The fourth gear 622 is an incomplete gear that can intermittently mesh with the rack 61.

[0096] The second transmission mechanism 63 includes a fifth gear 631 and a sixth gear 632 fixed on the same axis. The fifth gear 631 is a full gear that is constantly meshed with the idler gear 33. The sixth gear 632 is also an incomplete gear and can also intermittently mesh with the rack 61. The introduction of the idler gear 33 makes the rotation direction of the fifth gear 631 opposite to that of the third gear 621.

[0097] When lead screw 3 rotates clockwise under the drive of motor 4:

[0098] The first external thread groove 31 of the lead screw 3 engages with the threaded hole 54 of the first connecting bushing 51, driving the first connecting bushing 51 and the upper die 55 connected to it via the third connecting shaft 53 to move upward along the trajectory of the second guide groove 22 and leave the working area.

[0099] Simultaneously, the second external thread groove 34 of the lead screw 3 meshes with the second connecting bushing 104 on the second base plate 10, driving the second base plate 10 and the lower mold 6 it carries to move upward along the first connecting shaft 16. This process continues until the second base plate 10 moves to a specific position, causing the seventh gear 103 in the mounting bushing 102 to mesh with the second gear 323 of the drive mechanism 32. At this time, the second connecting bushing 104 moves upward to disengage from the effective meshing area of ​​the second external thread groove 34, but still maintains sliding contact with the top of the thread of the second external thread groove 34 due to its gravity and the geometric relationship of the thread pair, accompanied by slight fluctuations. However, since the tooth width design of the seventh gear 103 and the second gear 323 is greater than this fluctuation range, it does not affect the effective meshing transmission of the two.

[0100] The rotational motion of the lead screw 3 is transmitted to the second gear 323 via the seventh gear 103. The second gear 323 drives the integrated drive wheel 321 and the first gear 322 to rotate. The rotation of the first gear 322 is transmitted in two ways: one way directly drives the third gear 621 and the fourth gear 622 of the first transmission mechanism 62 to rotate, and the other way drives the fifth gear 631 and the sixth gear 632 of the second transmission mechanism 63 to rotate in the opposite direction via the idler gear 33. At this time, if the rack 61 is engaged with the toothed section of the fourth gear 622, the fourth gear 622 drives the rack 61 and the lower die 6 to move laterally to one side of the second transmission mechanism 63. At the same time, the toothless arc surface of the sixth gear 632 of the second transmission mechanism 63 will slide past the toothed surface of the rack 61 without generating a driving effect. This movement causes one cavity on the lower die 6, let's say cavity A, to move to the "working position" corresponding to the descent trajectory of the upper die 55, while the other cavity, let's say cavity B, moves to the "non-working position".

[0101] Subsequently, the lead screw 3 rotates counterclockwise, and the first external thread groove 31 of the lead screw 3 drives the upper mold assembly 5 and the upper mold 55 to move downward along the trajectory of the first guide groove 21. At the same time, the thread of the second external thread groove 34 is screwed into the second connecting bushing 104, driving the second base plate 10 and the lower mold 6 to move downward as a whole. During the downward movement, the seventh gear 103 disengages from the second gear 323, and the second connecting bushing 104 finally moves down to contact the limiting bushing 35. When rotating counterclockwise, the thread side of the second external thread groove 34 and the thread side of the second connecting bushing 104 remain in tangential contact, without generating effective meshing drive. At this time, one upper mold 55 descends and closes with the mold cavity A that has moved to the working position, completing the shaping and forming operation of the metal part. The remaining upper molds 55 and the mold cavity B in the non-working position do not participate in the mold closing and are in a non-working state.

[0102] After the mold closing process is completed, the lead screw 3 rotates clockwise again, driving the upper mold 55 to rise and disengage, and driving the second base plate 10 and the lower mold 6 to move upward again. The upward stroke causes the seventh gear 103 to mesh with the second gear 323 again.

[0103] When the current mold 6 moves to a specific position, the meshing section of the rack 61 and the fourth gear 622 are disengaged, and instead mesh with the toothed section of the sixth gear 632;

[0104] The power transmission path is: lead screw 3 → seventh gear 103 → second gear 323 → driving wheel 321 → first gear 322 → idler gear 33 → fifth gear 631 → sixth gear 632 → rack 61. Since the idler gear 33 changes the transmission direction, the sixth gear 632 drives the rack 61 and the lower mold 6 to move in the opposite direction to the previous stage, that is, to move towards the side of the first transmission mechanism 62. This movement moves the mold cavity A, which has completed its work, back to the non-working position, while moving the mold cavity B, which has cooled and rested, into the working position, thus completing the exchange of the working positions of the two mold cavities.

[0105] By controlling the rotation direction and cycle of the lead screw 3, the upper mold 55 is spirally lifted and closed, and the lower mold 6 is laterally moved and switched between working positions. The two mold cavities alternately enter the working position, so that when one mold cavity is working, the other mold cavity is in a non-working state, realizing intermittent work and natural heat dissipation, thereby optimizing the thermal management of the mold and improving the service life of the device. In the entire transmission process, the actions of each component are uniformly driven by the rotation of the lead screw and precisely coordinated by gears, incomplete gears, threaded pairs and other mechanisms, with strict logic and smooth action.

[0106] like Figure 4 As shown, in order to achieve precise switching and cycling between the two motion trajectories of the upper mold 55 in spiral descent and vertical ascent, and to ensure that the three upper molds 55 can rotate into the working position in turn, this device is equipped with a set of stop and limit mechanism in the spiral guide mechanism of the outer sleeve 2.

[0107] On the outer circumferential wall of the outer sleeve 2, corresponding to the lower end outlet of the first guide groove 21 of the spiral, a first stop block 23 is rotatably installed by a pin. In its natural state, that is, when there is no external force, the first stop block 23 can block the lower end outlet of the first guide groove 21. On the wall of the outer sleeve 2, near the lower end of the first stop block 23, a first limiting block 24 is integrally formed. The first limiting block 24 restricts the swing range of the first stop block 23, so that it can only rotate unidirectionally toward the second guide groove 22 adjacent to the first guide groove 21.

[0108] Furthermore, at the intersection of the first guide groove 21 and the second guide groove 22, usually near the starting point of the spiral trajectory, a second stop 25 is rotatably installed via a pin. The mounting pin of the second stop 25 is located at its lower end. A second limiting block 26 and a third limiting block 27 are correspondingly formed on the wall surface of the outer sleeve 2. The second limiting block 26 is located at the upper end of the second stop 25, that is, below the end away from the pin, and provides support for the second stop 25 in its natural state, preventing it from flipping downwards. The third limiting block 27 is located above the second stop 25. When the second stop 25 is subjected to an upward pushing force and flips, the third limiting block 27 limits its upward flipping angle.

[0109] When the lead screw 3 drives the upper mold assembly 5 to rotate counterclockwise downwards, the third connecting shaft 53 slides downwards along the spiral trajectory of the first guide groove 21. When the third connecting shaft 53 moves to the bottom end of the first guide groove 21, it contacts the first stop block 23, which is in a blocked state. Under the continuous pressure of the third connecting shaft 53, the first stop block 23, with its upper pin as the axis, overcomes the constraint and flips towards the second guide groove 22, thereby opening the passage for the third connecting shaft 53. The third connecting shaft 53 then disengages from the first guide groove 21, enters and continues to move along the second guide groove 22 that is connected to it. Once the third connecting shaft 53 has completely passed through, the first stop block 23 swings back under the action of gravity or elastic reset mechanism, and its lower end contacts the first limit block 24, restoring the blocked state of the lower end outlet of the first guide groove 21.

[0110] When the lead screw 3 drives the upper mold assembly 5 to rotate clockwise and move upward, the third connecting shaft 53 moves along the trajectory of the second guide groove 22. During this upward movement, the first stop 23 at the lower end of the blocked first guide groove 21 will prevent the third connecting shaft 53 from re-entering the first guide groove 21, forcing the third connecting shaft 53 to remain in the second guide groove 22 and continue to move upward.

[0111] When the third connecting shaft 53 moves upward to the intersection of the first guide groove 21 and the second guide groove 22, it will contact the second stop 25. Under the thrust of the third connecting shaft 53, the second stop 25 flips upward with its lower pin as the axis, and its upper end abuts against the third limiting block 27, thus forming a guide slope facing the upper opening of the first guide groove 21. This slope guides the third connecting shaft 53 to smoothly transition from the second guide groove 22 into the upper section of the first guide groove 21. Subsequently, the third connecting shaft 53 continues to move upward along the spiral trajectory of the first guide groove 21 to the stop point. When the third connecting shaft 53 has completely passed, the second stop 25 loses its thrust and swings back under its own gravity or the action of the elastic reset mechanism. Its lower end resets and is supported by the second limiting block 26, restoring its natural state and re-blocking the entrance at the intersection of the second guide groove 22 and the first guide groove 21.

[0112] When the upper mold assembly 5 needs to perform the downward mold closing action again, the lead screw 3 rotates counterclockwise again, and the third connecting shaft 53 starts from the upper end of the first guide groove 21 and moves down along the spiral trajectory. When it reaches the intersection with the second guide groove 22, the second stop 25, which has now returned to a horizontal state, blocks the path of the third connecting shaft 53 directly into the second guide groove 22. Therefore, the third connecting shaft 53 can only continue to move down along the spiral trajectory of the first guide groove 21 until the bottom end triggers the first stop 23 again and switches to the second guide groove 22, repeating the process of step 1.

[0113] Through the synergistic effect of the aforementioned stop blocks and limit blocks, the movement path of the third connecting shaft 53 is forcibly defined as a fixed cycle of "first guide groove downward → second guide groove upward → first guide groove downward". This design ensures that the three upper molds 55 enter the lower mold closing position sequentially and cyclically in space, realizing the rotation and intermittent rest of the upper molds, which is conducive to the even distribution of heat load and mechanical load, thereby ensuring the overall service life of the upper mold assembly.

[0114] like Figure 1 , Figure 3 and Figure 5 As shown, in order to realize online maintenance and upkeep of the upper mold 55, this device adds a cleaning and spraying station at the bottom of the inner cavity of the outer cover 1;

[0115] At the bottom of the inner cavity of the outer cover 1, at a position that forms a 120° angle with the cavity of the lower mold 6 in the working position, a second mounting groove 7 is detachably provided. During the rotation of the three upper molds 55, when one of the upper molds 55 is working with the lower mold 6, the other two upper molds 55 in the idle position descend along a spiral trajectory, and the first idle upper mold 55 is just suspended at the upper port of the second mounting groove 7.

[0116] Inside the second mounting groove 7, a cleaning device 8 is installed. The cleaning device 8 is made of a velvet cloth or other flexible wiping material. When the idle upper mold 55 descends to the top of the second mounting groove 7, its molding surface comes into contact with the cleaning device 8. The cleaning device 8 wipes away the processing debris remaining on the surface of the upper mold 55.

[0117] At a position 120° laterally to the second mounting groove 7, a second connecting groove 9 is detachably installed at the bottom of the inner cavity of the outer cover 1. The second connecting groove 9 has a conical structure, and its bottom end passes through the bottom of the outer cover 1 and the first base plate 13 in sequence, and is connected to the external high-pressure atomizing oil spraying device through a pipe.

[0118] When the cleaned upper mold 55 moves to the position corresponding to the second connecting groove 9 during rotation, the upper mold 55 descends and mates with the top of the second connecting groove 9. At this time, the high-pressure atomizing oil spraying device is activated, spraying oil mist through the second connecting groove 9 onto the surface of the upper mold 55. This process reduces the temperature of the upper mold while forming a uniform protective oil film on its surface. At the same time, because the upper mold 55 and the second connecting groove 9 are in contact, the oil mist can be prevented from spreading into the working environment during spraying, thus avoiding pollution of the working environment.

[0119] With the above settings, the three upper molds 55 go through three stations in sequence during the cycle: mold closing and forming, debris cleaning, and oil spraying, cooling and protection. This realizes the automatic alternation of work and maintenance, thereby effectively extending the service life of the upper molds.

[0120] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Those skilled in the art can readily implement the invention based on the accompanying drawings and the description above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, using the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A casting mold for metal parts of new energy vehicles, characterized in that, include: The outer cover (1) has an inner outer sleeve (2) and the outer surface of the outer sleeve (2) has a spiral first guide groove (21). The upper mold assembly (5) includes a first connecting bushing (51) axially movable inside the outer sleeve (2) and a connecting block (52) outside the outer sleeve (2). The first connecting bushing (51) is connected to a third connecting shaft (53) that passes through the first guide groove (21) and is connected to the connecting block (52). The connecting block (52) is provided with a plurality of upper molds (55). The lead screw (3) is rotatably disposed inside the outer cover (1) and threadedly connected to the first connecting bushing (51). The rotational movement of the lead screw (3) drives the first connecting bushing (51) to move axially, and then through the cooperation of the third connecting shaft (53) and the first guide groove (21), it drives the multiple upper dies (55) to rise and fall along the spiral trajectory. The lower mold (6) is laterally movable inside the outer cover (1) and is connected to the lead screw (3) for transmission, so that the rotational motion of the lead screw (3) can be converted into the lateral movement of the lower mold (6). The lower mold (6) is provided with at least two mold cavities. A transmission mechanism is connected between the lead screw (3) and the lower die (6). The rotation of the lead screw (3) selectively drives the lower die (6) to move laterally through the transmission mechanism, so as to alternately move its different mold cavities into the mold closing position corresponding to the upper die (55). The plurality of upper dies (55) are driven by the lead screw (3) to move in a cycle, such that when one of the upper dies (55) is closed with the mold cavity in the mold closing position, the other upper dies (55) are in different preparation or maintenance positions.

2. A casting mold for metal parts of new energy vehicles according to claim 1, characterized in that: The outer surface of the outer sleeve (2) is provided with a plurality of vertical second guide grooves (22), each of the second guide grooves (22) being alternately connected with the spiral first guide groove (21) to form a closed-loop path for the movement of the third connecting shaft (53).

3. A casting mold for metal parts of new energy vehicles according to claim 2, characterized in that: A trajectory control component is provided at the bottom outlet of the first guide groove (21) and at the intersection with the second guide groove (22); The trajectory control component includes a first stop (23) and a second stop (25) that are rotatably arranged, and a first limit block (24), a second limit block (26) and a third limit block (27) that constrain the swing angle of the first stop (23) and the second stop (25). During its movement, the third connecting shaft (53) contacts the first stop (23) and the second stop (25) and pushes them to rotate, thereby switching the movement path of the third connecting shaft (53) between the first guide groove (21) and the second guide groove (22).

4. A casting mold for metal parts of new energy vehicles according to claim 1, characterized in that: The transmission mechanism includes a second base plate that can be axially slidably disposed, and the lower mold (6) is supported on the second base plate; The second base plate is connected to the lead screw (3) by a threaded pair, so that the rotation of the lead screw (3) can drive the second base plate and the lower die (6) to rise and fall along the axial direction of the lead screw (3).

5. A casting mold for metal parts of new energy vehicles according to claim 4, characterized in that: The transmission mechanism also includes a gear set that is connected to the lead screw (3) and a rack (61) that is connected to the lower die (6). When the second base plate is raised or lowered to the set position, the rotation of the lead screw (3) drives the rack (61) through the gear set, thereby causing the lower mold (6) to move laterally relative to the second base plate.

6. A casting mold for metal parts of new energy vehicles according to claim 5, characterized in that: The gear set includes a drive mechanism (32) rotatably mounted on the lead screw (3) and a third gear (621) and a fifth gear (631) respectively meshing with the drive mechanism (32). The third gear (621) and the fifth gear (631) are respectively provided with a fourth gear (622) and a sixth gear (632) that intermittently mesh with the rack (61). The lateral movement direction of the lower mold (6) is determined by the fourth gear (622) and the sixth gear (632) currently meshing with the rack (61).

7. A casting mold for metal parts of new energy vehicles according to claim 1, characterized in that: The bottom of the inner cavity of the outer cover (1) is also provided with a maintenance station surrounding the mold closing station of the lower mold (6); The maintenance station includes a cleaning station and a spraying station. When the upper mold (55) moves to the cleaning station or the spraying station, it performs surface cleaning or spraying of lubricant, respectively.

8. A casting mold for metal parts of new energy vehicles according to claim 7, characterized in that: The cleaning station is equipped with a cleaning device (8) made of flexible material. The upper mold (55) that moves to the station comes into contact with the cleaning device (8) to wipe its surface.

9. A casting mold for metal parts of new energy vehicles according to claim 7, characterized in that: The spraying station is provided with a second connecting groove (9) that communicates with an external atomizing oil spraying device. The upper mold (55) that moves to the station engages with the top of the second connecting groove (9). The oil mist sprayed by the atomizing oil spraying device is guided by the second connecting groove (9) and covers the surface of the upper mold (55).

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