Core pulling mechanism applied to new energy automobile die-casting die

Abstract

The invention relates to the technical field of die-casting dies, in particular to a core pulling mechanism applied to a new energy automobile die-casting die, which comprises a base, and an oil cylinder and a guide sleeve are arranged on the base; a sliding block is arranged in the guide sleeve; a first U-shaped groove is formed in the sliding block, a first clamping part and a second clamping part are arranged at the two ends of the first U-shaped groove correspondingly, a forming mold is embedded in the first clamping part, a cooling pipeline is embedded in the second clamping part, the first U-shaped groove is formed in the sliding block, the forming mold and the cooling pipeline are integrated, the remodeling time is shortened, and the remodeling efficiency is improved. Meanwhile, the extension pipeline of the cooling pipeline is directly inserted into the forming mold, so that the heat exchange efficiency of a cooling medium and the mold is improved, the thermal fatigue of the forming mold caused by contact of a high-temperature alloy solution is reduced, and the defects of oil duct air holes, shrinkage cavities and the like are reduced, so that the cooling pipeline and the forming mold can be integrated, and the overall structural strength is improved; damage to the forming die and the cooling pipeline is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting dies, and in particular to a core-pulling mechanism used in die-casting dies for new energy vehicles. Background Art

[0002] In the die-cast production of high-pressure oil passages in transmission housings for new energy vehicles, cylinder slider cores exceeding 150mm in depth are susceptible to bending or breaking at their base due to the extended contact distance with the high-temperature alloy solution. Failure to promptly replace the core can lead to air holes, shrinkage holes, and even leakage in the oil passages, compromising product quality. The axial center fixed pin connection commonly used in existing technologies requires disassembly of the core-pulling cylinder and connector when replacing the core. This process is cumbersome and time-consuming, and a single replacement often takes a long time, increasing the labor intensity of mold workers and significantly impacting production efficiency.

[0003] The new oil cylinder core pulling device disclosed in China Patent Authorization Announcement No. CN209077750U has made improvements to the above-mentioned problems. The device adopts a side slide fixing structure to replace the traditional axial center fixing method. Through the clamping design of the rectangular groove of the pressure plate sleeve and the oblique core pulling pin, the pressure plate and bolts are used to realize the rapid installation and fixation of the core. This structure does not require the removal of the core pulling cylinder body and external connecting parts, which greatly simplifies the core replacement process. Due to the radial clamping force of the high-temperature molten metal on the root of the core during the die-casting process, the core may still bend or break due to stress concentration at the root under high pressure. It is easy to lead to increased core pulling resistance and increased core wear, which indirectly affects the molding accuracy and surface quality of the die-casting parts. Summary of the Invention

[0004] In response to the above problems, a core pulling mechanism is provided for new energy vehicle die-casting molds. By arranging a first U-shaped groove on the slider to integrate the molding mold and the cooling pipeline, the mold change time is shortened. At the same time, the extension pipe of the cooling pipeline is directly inserted into the molding mold, thereby improving the heat exchange efficiency between the cooling medium and the mold, reducing the thermal fatigue of the molding mold caused by contact with the high-temperature alloy solution, reducing defects such as oil channel pores and shrinkage cavities, and allowing the cooling pipeline to become one with the molding mold, thereby improving the overall structural strength, avoiding damage to the molding mold and the cooling pipeline, and extending their service life.

[0005] In order to solve the problems of the prior art, the present invention provides a core pulling mechanism for a die-casting mold for new energy vehicles, comprising a base, characterized in that an oil cylinder and a guide sleeve extending in a horizontal direction are provided on the base; a slider that slides with the guide sleeve is provided in the guide sleeve, and the slider is fixedly connected to the output shaft of the oil cylinder; a first U-shaped groove extending along its axial direction is provided on the slider, and a first clamping part and a second clamping part are provided at both ends of the first U-shaped groove, a forming mold is embedded in the first clamping part, a cooling pipeline is embedded in the second clamping part, and the second clamping part is located on the side of the slider close to the oil cylinder; the forming mold is a hollow structure; the cooling pipeline is provided with a connecting pipe connected to an external cooling medium and an extension pipe that can be inserted into the forming mold.

[0006] Preferably, a mounting groove connected to the interior of the guide sleeve is provided on the outer wall, a rotatable connecting rod is provided on the mounting groove, and a pulley that can be inserted into the first U-shaped groove is provided on the end of the connecting rod away from the mounting groove, and the pulley is slidably connected to the outer wall of the cooling pipe.

[0007] Preferably, a transmission rod is hingedly connected to the middle of the connecting rod, a transmission sleeve that slides with the guide sleeve is provided on the guide sleeve, and the other end of the transmission rod is connected to the transmission sleeve.

[0008] Preferably, the guide sleeve is further provided with a first mounting sleeve threadedly engaged therewith, the first mounting sleeve is rotationally engaged with the transmission sleeve, and a positioning hole is provided on the first mounting sleeve.

[0009] Preferably, a connecting piece is provided on one end of the guide sleeve away from the base, a second U-shaped groove is provided on the connecting piece, a third clamping portion is provided in the second U-shaped groove, and a guide tube for limiting the forming mold is embedded in the third clamping portion.

[0010] Preferably, the forming mold includes a mounting portion connected to the slider and a forming portion for forming the product, and the mounting portion can be embedded in the third engaging portion of the connecting piece.

[0011] Preferably, the connecting member is provided with a second mounting sleeve that is threadably engaged with the connecting member, and a limiting ring is provided on one end of the connecting member close to the guide sleeve.

[0012] Preferably, the connecting member is further provided with a mounting hole extending radially thereof, and an abutment rod elastically connected thereto is provided in the mounting hole, and when the second mounting sleeve slides, the abutment rod is driven to move into the second U-shaped groove.

[0013] Preferably, the output shaft of the oil cylinder is a hollow structure, the slider is inserted into the output shaft of the oil cylinder, and a pin for fixing the slider is provided on the output shaft.

[0014] Preferably, the inner wall of the guide tube is provided with a wear-resistant coating.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention integrates the forming mold and the cooling pipeline by arranging a first U-shaped groove on the slider, and utilizes the first clamping parts and the second clamping parts at both ends to achieve compact installation, effectively reducing the space occupied inside the mold; the extension pipe of the cooling pipeline is directly inserted into the forming mold to form a close-range cooling structure, thereby improving the heat exchange efficiency between the cooling medium and the mold, reducing the thermal fatigue of the forming mold caused by contact with the high-temperature alloy solution, and reducing defects such as oil channel pores and shrinkage cavities. At the same time, the cooling pipeline can be integrated with the forming mold, thereby improving the overall structural strength, avoiding damage to the forming mold and the cooling pipeline, and extending their service life.

[0017] 2. The present invention provides precise guidance for the core pulling movement through the sliding cooperation between the guide sleeve and the slider, ensuring the linear movement of the forming mold along the axis, improving the core pulling accuracy, and providing end limit and guide support for the forming mold through the combination of the connecting part and the guide tube, solving the problem of movement instability caused by excessive length and insufficient rigidity when pulling long cores, and further improving the core pulling accuracy; the structural setting of the second U-shaped groove and the third clamping part facilitates the rapid installation and disassembly of the guide tube, adapts to the mold change requirements of forming molds of different specifications, and shortens the mold debugging time; the constraint of the guide tube on the forming mold can reduce the wear between it and the guide sleeve, and extend the service life of the forming mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural diagram of the core pulling mechanism used in the die-casting mold of new energy vehicles. Figure 1 .

[0019] Figure 2 This is a three-dimensional structural diagram of the core pulling mechanism used in the die-casting mold of new energy vehicles. Figure 2 .

[0020] Figure 3 It is a schematic cross-sectional structure diagram of the core pulling mechanism used in the die-casting mold of new energy vehicles.

[0021] Figure 4 This is a three-dimensional structural diagram of the cylinder and slider in the core-pulling mechanism used in the die-casting mold of new energy vehicles.

[0022] Figure 5 This is a three-dimensional structural diagram of the guide tube, connector and forming mold in the core-pulling mechanism used in the die-casting mold of new energy vehicles.

[0023] Figure 6 This is an exploded view of the connector and forming mold in the core-pulling mechanism used in the die-casting mold of new energy vehicles.

[0024] Figure 7 This is an exploded view of the forming die, slider, and cooling pipe in the core-pulling mechanism used in the die-casting mold of new energy vehicles.

[0025] Figure 8 This is an exploded view of the forming mold and cooling pipeline in the core-pulling mechanism used in the die-casting mold of new energy vehicles.

[0026] Figure 9 yes Figure 2 Enlarged view of point A in the middle.

[0027] Figure 10 yes Figure 3 Enlarged view of point B in the middle.

[0028] The numbers in the figure are:

[0029] 1. Base; 11. Cylinder; 111. Output shaft; 1111. Pin; 12. Guide sleeve; 121. Mounting groove; 1211. Connecting rod; 1212. Pulley; 1213. Transmission rod; 122. Transmission sleeve; 123. First mounting sleeve; 1231. Positioning hole; 124. Connecting piece; 1241. Second U-shaped groove; 1242. Third engaging portion; 1243. Second mounting sleeve; 1244. Limiting ring; 1245. Mounting hole; 1246. Abutting rod; 125. Guide tube; 2. Slider; 21. First U-shaped groove; 211. First engaging portion; 212. Second engaging portion; 22. Cooling pipe; 221. Connecting pipe; 222. Extension pipe; 23. Molding die; 231. Mounting portion; 232. Molding portion. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 8 As shown: A core-pulling mechanism used in a die-casting mold for new energy vehicles includes a base 1, on which is provided an oil cylinder 11 and a guide sleeve 12 extending in a horizontal direction; a slider 2 that slides with the guide sleeve 12 is provided in the guide sleeve, and the slider 2 is fixedly connected to the output shaft 111 of the oil cylinder 11; a first U-shaped groove 21 extending along its axial direction is provided on the slider 2, and a first clamping portion 211 and a second clamping portion 212 are respectively provided at both ends of the first U-shaped groove 21, a forming mold 23 is embedded in the first clamping portion 211, and a cooling pipe 22 is embedded in the second clamping portion 212, and the second clamping portion 212 is located on the side of the slider 2 close to the oil cylinder 11; the forming mold 23 is a hollow structure; the cooling pipe 22 is provided with a connecting pipe 221 that is connected to an external cooling medium and an extension pipe 222 that can be inserted into the forming mold 23.

[0032] The base 1 serves as a supporting platform for the oil cylinder 11 and the guide sleeve 12 .

[0033] The oil cylinder 11 drives the slider 2 to slide back and forth horizontally within the guide sleeve 12 via the output shaft 111, achieving core pulling and reset. The first U-shaped groove 21 on the slider 2 extends along its axis. The first and second engaging portions 211, 212 at either end of the first U-shaped groove 21 are respectively embedded in the forming mold 23 and the cooling pipe 22, forming a rigid connection between the forming mold 23 and the cooling pipe 22 and the slider 2, allowing them to move synchronously with the slider 2. The forming mold 23 is a hollow structure. The extension pipe 222 on the cooling pipe 22 is inserted into the interior of the forming mold 23, and the connecting pipe 221 is connected to the external cooling system. After the slider 2 drives the forming mold 23 to complete the mold closing and injection molding, the cooling medium flows through the connecting pipe 221 into the extension pipe 222, cooling the interior of the forming mold 23 and preventing overheating of the mold caused by the high-temperature alloy solution. When the mold is opened, the oil cylinder 11 drives the slider 2 backward, and the forming mold 23 exits the mold cavity along with the slider 2. The cooling pipe 22 is simultaneously recovered, completing the core pulling process.

[0034] By setting a first U-shaped groove 21 on the slider 2, the forming mold 23 and the cooling pipe 22 are integrated, and the first clamping parts 211 and the second clamping parts 212 at both ends are used to achieve compact installation, effectively reducing the space occupied inside the mold; the extension pipe 222 of the cooling pipe 22 is directly inserted into the forming mold 23 to form a close-range cooling structure, thereby improving the heat exchange efficiency between the cooling medium and the mold, reducing the thermal fatigue of the forming mold 23 caused by the contact with the high-temperature alloy solution, and reducing defects such as oil channel pores and shrinkage cavities. At the same time, the cooling pipe 22 can be integrated with the forming mold 23, thereby improving the overall structural strength, avoiding damage to the forming mold 23 and the cooling pipe 22, and extending their service life.

[0035] The sliding fit between the guide sleeve 12 and the slider 2 provides precise guidance for the core pulling movement, ensuring that the forming mold 23 moves linearly along the axis, improving the core pulling accuracy, and avoiding bending or breakage problems caused by uneven force during core pulling of traditional long cores; the structure of the cylinder 11 driving the slider 2 provides stable power output, adapts to the high-pressure environment during the die-casting process, ensures the reliability and repeatability of the core pulling action, and improves the production efficiency and yield rate of die-casting parts for new energy vehicles.

[0036] like Figures 1 to 3 and Figure 10 As shown: a mounting groove 121 connected to the interior of the guide sleeve 12 is provided on the outer wall thereof, a rotatable connecting rod 1211 is provided on the mounting groove 121, and a pulley 1212 which can be inserted into the first U-shaped groove 21 is provided on the end of the connecting rod 1211 away from the mounting groove 121, and the pulley 1212 is slidably connected to the outer wall of the cooling pipe 22.

[0037] The mounting groove 121 on the outer wall of the guide sleeve 12 provides a rotation fulcrum for the connecting rod 1211 , so that the connecting rod 1211 can rotate around the connection point between the connecting rod 1211 and the mounting groove 121 . When the slider 2 drives the cooling pipe 22 to move axially along the guide sleeve 12, the end of the connecting rod 1211 rotates into the guide sleeve 12. At this time, the pulley 1212 is inserted into the first U-shaped groove 21. Since the first U-shaped groove 21 extends along the axis of the slider 2, the pulley 1212 on the connecting rod 1211 can slide with the outer wall of the cooling pipe 22. When the cooling pipe 22 moves, if the cooling pipe 22 has a radial runout tendency due to fluctuations in the driving force of the cylinder 11 or vibrations during the die-casting process, the pulley 1212 will apply reverse resistance through sliding contact with the outer wall of the cooling pipe 22. The connecting rod 1211 adjusts its angle by rotating within the mounting groove 121, converting this resistance into a stable supporting force for the cooling pipe 22, thereby suppressing the runout of the cooling pipe 22 and ensuring that it always moves smoothly along the predetermined path. The connecting rod 1211 can be configured to be elastically connected to the mounting groove 121 (not shown in the figure), thereby ensuring that pressure is applied to the cooling pipe 22. At the same time, the setting of the connecting rod 1211 can also play a certain limiting role on the slider 2, ensuring that the slider 2 will not deviate during the sliding process.

[0038] By arranging a rotatable connecting rod 1211 and a pulley 1212 on the guide sleeve 12, a dynamic support structure for the cooling pipe 22 is formed, which effectively suppresses the jumping of the cooling pipe 22 during high-speed reciprocating motion, improves the stability of the connection between the cooling pipe 22 and the forming mold 23, and avoids friction damage or sealing failure between the extended pipe 222 and the inner wall of the forming mold 23 caused by jumping; the stable movement of the cooling pipe 22 ensures the reliability of the cooling medium transportation, avoids uneven flow or leakage of the cooling medium due to pipeline jumping, further improves the cooling effect of the forming mold 23, and optimizes the molding quality of new energy vehicle die-castings.

[0039] like Figures 1 to 3 and Figure 10 As shown, a transmission rod 1213 is hingedly connected to the middle of the connecting rod 1211 , a transmission sleeve 122 that slides with the connecting rod 1213 is provided on the guide sleeve 12 , and the other end of the transmission rod 1213 is connected to the transmission sleeve 122 .

[0040] When it is necessary to adjust the angle of the connecting rod 1211, the drive transmission sleeve 122 is driven to move along the axial direction of the guide sleeve 12. The movement of the transmission sleeve 122 is transmitted to the hinge point in the middle of the connecting rod 1211 through the transmission rod 1213 connected thereto. Since one end of the connecting rod 1211 is slidingly connected to the outer wall of the cooling pipe 22 through the pulley 1212, and the other end is rotatable in the mounting groove 121, the push-pull action of the transmission rod 1213 forces the connecting rod 1211 to rotate around its connection point in the mounting groove 121, thereby changing the contact angle between the connecting rod 1211 and the outer wall of the cooling pipe 22. Therefore, during the process of the slider 2 driving the cooling pipe 22 to move, by pre-adjusting the position of the transmission sleeve 122, the angle of the connecting rod 1211 can be adapted to the support requirements under different working conditions. For example, when the cooling pipe 22 moves at high speed, the support angle is increased to enhance the anti-jumping ability.

[0041] Through the linkage structure of the transmission sleeve 122 and the transmission rod 1213, the angle of the connecting rod 1211 is actively adjusted, so that the support structure can dynamically optimize the support angle according to the different movement states and force conditions of the cooling pipeline 22, thereby improving the suppression effect of the cooling pipeline 22 jumping; the adjustable support angle can adapt to various die-casting process requirements, such as providing greater radial support force during high-pressure die-casting, or reducing constraints on the cooling pipeline 22 during precision molding to avoid affecting the mold accuracy, thereby enhancing the versatility and process adaptability of the core pulling mechanism.

[0042] It should be noted that there is a limiting mechanism (not shown in the figure) on the outer wall of the guide sleeve 12 to ensure that the transmission sleeve 122 will not shift during the sliding process. The transmission sleeve 122 can be elastically connected to the end of the guide sleeve 12 by setting an elastic part, thereby realizing adaptive pressure on the cooling pipe 22.

[0043] like Figures 1 to 6 、 Figure 9 and Figure 10 As shown, the guide sleeve 12 is further provided with a first mounting sleeve 123 threadedly engaged therewith. The first mounting sleeve 123 is rotationally engaged with the transmission sleeve 122 , and a positioning hole 1231 is provided on the first mounting sleeve 123 .

[0044] The first mounting sleeve 123 on the guide sleeve 12 is threadedly engaged with the guide sleeve 12 to form a structure that can move along the axial direction of the guide sleeve 12. When the first mounting sleeve 123 is rotated, due to the threaded transmission, the first mounting sleeve 123 will move forward or backward along the axis of the guide sleeve 12, driving the transmission sleeve 122 that rotates with it to move synchronously. The movement of the transmission sleeve 122 is transmitted to the hinge point in the middle of the connecting rod 1211 through the transmission rod 1213, thereby adjusting the angle of the connecting rod 1211. The positioning hole 1231 on the first mounting sleeve 123 is used to insert fixing parts such as positioning pins or bolts. When the first mounting sleeve 123 is adjusted to the desired position, the first mounting sleeve 123 is locked to the guide sleeve 12 through the positioning hole 1231 to prevent it from being displaced due to vibration or force during operation, thereby ensuring the stability of the angle of the connecting rod 1211.

[0045] The precise position adjustment of the first mounting sleeve 123 is achieved through threaded transmission, and the angle of the connecting rod 1211 is precisely controlled through the transmission sleeve 122 and the transmission rod 1213, so that the support structure can be finely adjusted according to different die-casting process requirements, thereby improving the suppression effect of the vibration of the cooling pipe 22; the setting of the positioning hole 1231 allows the first mounting sleeve 123 to be firmly locked with the guide sleeve 12 after being adjusted into place, avoiding position deviation during operation and ensuring the stability of the support structure in a high-pressure, high-frequency vibration environment.

[0046] like Figures 2 to 6 As shown: a connecting piece 124 is further provided on the end of the guide sleeve 12 away from the base 1, a second U-shaped groove 1241 is provided on the connecting piece 124, a third clamping portion 1242 is provided in the second U-shaped groove 1241, and a guide tube 125 for limiting the forming mold 23 is embedded in the third clamping portion 1242.

[0047] The guide tube 125 is fixed to the end of the guide sleeve 12 away from the base 1 through the connector 124. The second U-shaped groove 1241 on the connector 124 provides installation space for the guide tube 125. The third locking portion 1242 fixes the guide tube 125 in the second U-shaped groove 1241 by embedding or snapping. When the slider 2 drives the forming mold 23 to move axially along the guide sleeve 12, the outer wall of the forming mold 23 contacts the inner wall of the guide tube 125. The guide tube 125 constrains the motion trajectory of the forming mold 23 through its rigid structure, ensuring that the forming mold 23 always moves in a straight line during the core pulling and resetting process. The limiting effect of the guide tube 125 can suppress the radial deviation of the forming mold 23, especially in the case of a long core, to avoid bending or swinging caused by the core being too long, and ensure the positioning accuracy of the forming part 232 when it is at the extreme position.

[0048] Through the combination of the connecting piece 124 and the guide tube 125, the end limit and guide support are provided for the forming mold 23, which solves the problem of movement instability caused by excessive length and insufficient rigidity when pulling out the long core, and improves the core pulling accuracy; the structural setting of the second U-shaped groove 1241 and the third clamping part 1242 facilitates the rapid installation and disassembly of the guide tube 125, adapts to the needs of changing molds 23 of different specifications, and shortens the mold debugging time; the constraint of the guide tube 125 on the forming mold 23 can reduce the wear between it and the guide sleeve 12, and extend the service life of the forming mold 23.

[0049] like Figures 2 to 8 As shown, the molding die 23 includes a mounting portion 231 connected to the slider 2 and a molding portion 232 for product molding. The mounting portion 231 can be embedded in the third engaging portion 1242 of the connector 124 .

[0050] The mounting portion 231 of the forming die 23 is fixedly connected to the slider 2 via the first engaging portion 211 on the slider 2, ensuring that the forming die 23 can be driven synchronously with the slider 2 under the drive of the oil cylinder 11. When the slider 2 drives the forming die 23 to its extreme position, the forming portion 232 extends from the guide tube 125, exposed to the mold cavity area, completing the molding action during mold closing. When the slider 2 moves in the opposite direction, the forming portion 232 retracts into the guide tube 125 to prevent interference with the die casting during the mold opening process. The guide tube 125 provides full guidance during the movement of the forming portion 232, ensuring that the forming portion 232 enters and exits the mold cavity along a straight trajectory, thereby suppressing radial deviation of the long core.

[0051] like Figures 2 to 8 As shown, a second mounting sleeve 1243 is provided on the connecting member 124 and is threadedly matched therewith, and a limiting ring 1244 is provided on one end of the connecting member 124 close to the guide sleeve 12.

[0052] The second mounting sleeve 1243 on the connector 124 engages with the connector 124 via threads. After the guide tube 125 is inserted into the third engaging portion 1242, the second mounting sleeve 1243 is rotated to move along the threads toward the inside of the connector 124 until it presses against the retaining ring 1244 of the guide tube 125. This mechanical retaining mechanism prevents the guide tube 125 from escaping from the second U-shaped groove 1241. The retaining ring 1244 provides a clear locking point. When the second mounting sleeve 1243 rotates until it contacts the retaining ring 1244, the self-locking nature of the threaded engagement and the physical resistance of the retaining ring 1244 work together to secure the second mounting sleeve 1243 in a predetermined position, ensuring that the guide tube 125 is securely locked and preventing it from being displaced or falling off due to vibration or impact during the reciprocating motion of the slider 2 driving the forming mold 23.

[0053] like Figures 2 to 8As shown: the connecting member 124 is further provided with a mounting hole 1245 extending along its radial direction, and an abutment rod 1246 elastically connected to the mounting hole 1245 is provided in the mounting hole 1245. When the second mounting sleeve 1243 slides, the abutment rod 1246 is driven to move into the second U-shaped groove 1241.

[0054] Mounting hole 1245 radially extends through the sidewall of connector 124. As second mounting sleeve 1243 slides axially along connector 124, the inner wall or end surface of second mounting sleeve 1243 contacts the outer end of abutment rod 1246, exerting a thrust force that forces abutment rod 1246 to move toward the interior of second U-shaped groove 1241, overcoming the elastic force, until the inner end of abutment rod 1246 tightly abuts the outer wall of guide tube 125. This elastic connection allows abutment rod 1246 to retract slightly when subjected to a reaction force, thereby adapting to dimensional tolerances or thermal expansion deformation of guide tube 125 during operation. This ensures that abutment rod 1246 maintains a stable pressing force on guide tube 125 during the sliding motion of second mounting sleeve 1243, preventing guide tube 125 from falling out of second U-shaped groove 1241.

[0055] like Figures 1 to 4 As shown, the output shaft 111 of the oil cylinder 11 is a hollow structure, the slider 2 is inserted into the output shaft 111 of the oil cylinder 11, and a pin 1111 for fixing the slider 2 is provided on the output shaft 111.

[0056] The output shaft 111 of the oil cylinder 11 is hollow, facilitating the insertion of the slider 2 into the output shaft 111. Pins 1111 on the output shaft 111 securely connect the slider 2 to the output shaft 111, forming a rigid transmission assembly. When the piston of the oil cylinder 11 actuates, the output shaft 111, via pins 1111, drives the slider 2 axially along the guide sleeve 12, achieving core pulling or resetting. The securing effect of pins 1111 ensures that the driving torque of the output shaft 111 is reliably transmitted to the slider 2, preventing relative sliding or rotation between the two, thereby ensuring the synchronization and stability of the core pulling motion.

[0057] The inner wall of the guide tube 125 is provided with a wear-resistant coating.

[0058] The wear-resistant coating on the inner wall of the guide tube 125 is attached to the inner wall surface through processes such as spraying, electroplating, or sintering, forming a protective layer with high hardness and a low friction coefficient. When the forming portion 232 of the forming die 23 slides back and forth within the guide tube 125, the wear-resistant coating acts as the contact interface, withstanding the friction and wear generated by the relative movement between the two. This converts the direct metal friction between the forming portion 232 and the guide tube 125 into friction between the coating material and the surface of the forming portion 232, thereby reducing the loss of the guide tube 125's main material, ensuring that the inner wall of the guide tube 125 maintains good surface accuracy and geometric shape during long-term high-frequency sliding, continuously providing stable linear guidance for the forming die 23, and extending its service life.

[0059] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A core pulling mechanism for a die-casting mold for new energy vehicles, including a base, is characterized in that: An oil cylinder and a guide sleeve extending in the horizontal direction are provided on the base; A slider is provided in the guide sleeve and is in sliding cooperation with the guide sleeve. The slider is fixedly connected to the output shaft of the oil cylinder. The slider is provided with a first U-shaped groove extending along its axial direction, and a first clamping portion and a second clamping portion are respectively provided at both ends of the first U-shaped groove. The forming mold is embedded in the first clamping portion, and the cooling pipeline is embedded in the second clamping portion. The second clamping portion is located on the side of the slider close to the oil cylinder; The forming mold is a hollow structure; The cooling pipeline is provided with a connecting pipe communicating with an external cooling medium and an extension pipe which can be inserted into the forming mold.

2. The core pulling mechanism for the die-casting mold for new energy vehicles according to claim 1 is characterized in that: The outer wall of the guide sleeve is provided with a mounting groove connected to its interior, the mounting groove is provided with a rotatable connecting rod, and the end of the connecting rod away from the mounting groove is provided with a pulley that can be inserted into the first U-shaped groove, and the pulley is slidably connected to the outer wall of the cooling pipe.

3. The core pulling mechanism for the die-casting mold for new energy vehicles according to claim 2 is characterized in that: A transmission rod is hinged at the middle of the connecting rod, a transmission sleeve which is slidably matched with the guide sleeve is provided on the guide sleeve, and the other end of the transmission rod is connected to the transmission sleeve.

4. The core pulling mechanism for the die-casting mold for new energy vehicles according to claim 3 is characterized in that: The guide sleeve is also provided with a first mounting sleeve which is threadedly matched with the guide sleeve. The first mounting sleeve is rotationally matched with the transmission sleeve. A positioning hole is provided on the first mounting sleeve.

5. The core pulling mechanism for the die-casting mold for new energy vehicles according to claim 1, characterized in that: A connecting piece is also provided on the end of the guide sleeve away from the base. The connecting piece is provided with a second U-shaped groove. A third clamping part is provided in the second U-shaped groove. A guide tube for limiting the forming mold is embedded in the third clamping part.

6. The core pulling mechanism for the die-casting mold for new energy vehicles according to claim 5, characterized in that: The forming mold comprises a mounting portion connected to the slider and a forming portion for product forming, and the mounting portion can be embedded in the third engaging portion of the connecting piece.

7. The core pulling mechanism for the die-casting mold for new energy vehicles according to claim 5, characterized in that: The connecting piece is provided with a second mounting sleeve which is threadedly matched with the connecting piece, and a limiting ring is provided on one end of the connecting piece close to the guide sleeve.

8. The core-pulling mechanism for the die-casting mold for new energy vehicles according to claim 7, characterized in that: The connecting piece is also provided with a mounting hole extending along its radial direction, and an abutment rod elastically connected to the mounting hole is provided in the mounting hole. When the second mounting sleeve slides, the abutment rod is driven to move into the second U-shaped groove.

9. The core pulling mechanism for a die-casting mold for a new energy vehicle according to any one of claims 1 to 8, characterized in that: The output shaft of the oil cylinder is a hollow structure, the slider is inserted into the output shaft of the oil cylinder, and a pin for fixing the slider is provided on the output shaft.

10. The core pulling mechanism for a die-casting mold for a new energy vehicle according to any one of claims 1 to 8, characterized in that: The inner wall of the guide tube is provided with a wear-resistant coating.

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