A new energy automobile part stamping die set

Abstract

The application discloses a die set for stamping new energy automobile parts, and relates to the technical field of new energy automobile parts.The die set comprises a die mechanism and a plurality of guide mechanisms.The die mechanism comprises a plurality of guide columns and a plurality of guide sleeves.Each guide mechanism is arranged in an annular gap between each guide column and the corresponding guide sleeve.The guide sleeve is slidably arranged on the guide column through the guide mechanism for guiding the opening and closing of the die mechanism.The guide mechanism comprises a retainer, a plurality of rollers, a plurality of balls and a switching assembly.The plurality of rollers and balls are arranged on the retainer and in contact with the switching assembly.The switching assembly is arranged in the retainer.When the guide sleeve moves at low speed, the moving block abuts against the first bracket, and the rollers on the first bracket are outside the retainer.The plurality of rollers are slidably connected with the guide column and the guide sleeve for the low-speed and heavy-load guiding condition of the guide sleeve.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle parts technology, specifically to a stamping die set for new energy vehicle parts. Background Technology

[0002] Stamping die sets for automotive parts are core process equipment in stamping production lines. They typically include an upper die holder, a lower die holder, and a guiding mechanism consisting of guide pillars and guide sleeves positioned between them. The guiding mechanism ensures precise alignment and smooth movement of the upper and lower dies during die closing and opening, directly affecting the dimensional accuracy of the stamped parts, die life, and production efficiency.

[0003] To reduce frictional wear between the guide post and the guide sleeve, existing technologies widely employ rolling guide sleeve structures. This involves placing balls or rollers as rolling elements between the guide post and the guide sleeve, converting sliding friction into rolling friction. Ball bearing guide sleeves use balls as rolling elements, forming point contact with the guide post and guide sleeve. This results in low frictional resistance and sensitive movement, making them suitable for high-speed, light-load guiding applications. Roller guide sleeves use rollers as rolling elements, forming line contact with the guide post and guide sleeve. This provides high load-bearing capacity and rigidity, making them suitable for low-speed, heavy-load guiding applications.

[0004] Under high-speed, light-load conditions for the mold assembly, the contact area between the rollers and the guide pillars and guide sleeves is large. During high-speed reciprocating motion, the friction increases, causing heat to accumulate rapidly. This leads to a significant increase in the surface temperature of the rollers, raceways, and guide pillars. The guide pillars expand radially due to heat, reducing or even eliminating the clearance between them and the rollers, resulting in jamming. Under low-speed, heavy-load conditions for the mold assembly, the contact stress of the balls increases sharply when subjected to large stamping loads. They are easily damaged under impact loads. Once the cage breaks, the balls will scatter, leading to guide failure. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a die set for stamping new energy vehicle parts, comprising a die mechanism and multiple guiding mechanisms. The die mechanism includes multiple guide pillars and multiple guide sleeves. Each guiding mechanism is disposed within an annular gap between each guide pillar and its corresponding guide sleeve. The guide sleeve is slidably disposed on the guide pillar via the guiding mechanism for guiding the opening and closing of the die mechanism. The guiding mechanism includes a cage, multiple rollers, multiple balls, and a switching assembly. The multiple rollers and balls are all disposed on the cage and in contact with the switching assembly. The switching assembly is disposed inside the cage and is used to switch the contact between the rollers or balls and the guide rollers and guide sleeve according to the moving speed of the guide sleeve.

[0006] Preferably, the retainer is located in the annular gap between the guide post and the guide sleeve. The retainer, guide post, and guide sleeve are all hexagonal. The retainer has multiple cavities inside, and the switching assembly is disposed inside the cavity. The retainer has multiple through holes, and the rollers and balls are respectively radially movable and disposed in the through holes. The switching assembly includes a drive unit that switches between rollers and balls by changing the speed of the guide sleeve. The drive unit includes an electric push rod and a speed sensor. The electric push rod is disposed in the cavity, and the speed sensor is disposed on the mold mechanism to detect the moving speed of the guide sleeve and control the movement of the output end of the electric push rod.

[0007] Preferably, the switching assembly further includes a moving part driven by a drive unit. The moving part includes multiple moving blocks and two limiting blocks. The moving blocks are disposed at the output end of the electric push rod, and the limiting blocks are disposed at both ends of the moving blocks. Two limiting grooves are formed in the inner wall of the cavity. The limiting blocks are slidably disposed in the limiting grooves. The moving blocks are moved by the electric push rod, so that the rollers or balls switch contact with the guide post and guide sleeve. The movable block is rhomboid in shape, and multiple movable blocks are arranged sequentially along the same direction and connected to each other to form a long strip structure. The internal cavities of the multiple movable blocks are interconnected.

[0008] Preferably, the switching component further includes an execution unit, which includes a plurality of first supports, second supports, a fixing plate and a return spring. The first supports and the second supports are both trapezoidal to fit the moving block. The first supports are movably disposed in the cavity, and the rollers are rotatably disposed on the first supports. The second bracket is movably disposed within the cavity, and the ball is rotatably disposed on the second bracket. Multiple first brackets and second brackets are alternately arranged along the axial direction of the retainer. Multiple fixing plates are respectively vertically arranged on the first bracket and the second bracket, and the reset spring is arranged between the fixing plate and the inner wall of the cavity to reset the first bracket and the second bracket.

[0009] Preferably, when the speed sensor detects that the guide sleeve is moving at high speed, it controls the electric push rod to push the moving block to move. The moving block pushes the ball to move to the outside of the cage and contact the guide post and the guide sleeve. At the same time, the ball will move into the cage under the action of the return spring. When the speed sensor detects that the guide sleeve is moving at a low speed, it controls the electric push rod to push the moving block to move. The moving block pushes the roller to move to the outside of the cage and contact the guide post and the guide sleeve. At the same time, the ball will move into the cage under the action of the return spring.

[0010] Preferably, each set of the moving blocks is provided with an oil replenishment mechanism. The oil replenishment mechanism includes multiple vertical plates, multiple connecting springs, multiple retaining balls and plugs. The vertical plates are disposed inside the moving blocks. Multiple oil outlet holes are opened on the side wall of the moving blocks. The connecting springs are disposed at the end of the vertical plates near the oil outlet holes, and the retaining balls are disposed at the end of the connecting springs away from the vertical plates, for sealing the oil outlet holes when not in use.

[0011] Preferably, the movable block is provided with an oil filling hole for injecting lubricating oil into the movable block. The plug is detachably connected to the oil filling hole to prevent lubricating oil from flowing out of the oil filling hole. Both the first bracket and the second bracket are provided with connecting holes. After the lubricating oil flows out through the oil outlet hole, it passes through the connecting holes to lubricate the rollers and balls. The retainer is provided with multiple square holes, which communicate with the cavity for the plug to move and be disassembled.

[0012] Preferably, the mold mechanism further includes a base plate, a top plate, a lower mold base, and an upper mold base. The guide pillars are vertically disposed on the base plate, the top plate is disposed between multiple guide sleeves, the lower mold base is disposed at one end of the base plate near the top plate, the upper mold base is disposed at one end of the top plate near the base plate, and the speed sensor is disposed on the base plate and corresponds to the position of the guide sleeves.

[0013] Preferably, a groove is provided at one end of the lower mold base near the upper mold base to accommodate the upper mold base when the mold is closed, and a buffer spring is sleeved on the guide post, with the two ends of the buffer spring being fixed to the base plate and the retainer, respectively.

[0014] This invention provides a die set for stamping new energy vehicle parts. It has the following advantages: I. This die assembly for stamping new energy vehicle parts, through a guiding mechanism, allows the moving block to abut against the first support when the guide sleeve moves at low speed. The rollers on the first support are located outside the cage and are slidably connected to the guide post and guide sleeve via multiple rollers, suitable for low-speed, heavy-load guiding conditions of the guide sleeve. When the speed sensor detects high-speed movement of the guide sleeve, an electric push rod pushes the moving block to move. The moving block causes the second support to move the balls outward from the cage. Simultaneously, the first support and rollers move into the cage under the action of a return spring, and are slidably connected to the guide post and guide sleeve via multiple balls, suitable for high-speed, low-load conditions of the guide sleeve. By adjusting the position of the rollers and balls under different working conditions through the guiding mechanism, the guiding stability of the guide sleeve during high-speed or low-speed movement is achieved.

[0015] II. This stamping die assembly for new energy vehicle parts, through its oil replenishment mechanism, operates as follows: During roller operation, the moving block abuts against the first support. The first support pushes the corresponding retaining ball inwards from the moving block, releasing the retaining ball from blocking the oil outlet. At this time, lubricating oil flows through the gap between the retaining ball and the oil outlet into the connecting hole, and then flows onto the roller, continuously lubricating it. When it is necessary to switch the ball bearings, the electric push rod pushes the moving block upwards. The oil outlet corresponding to the connecting hole of the moving block and the first support is blocked by the retaining ball. The retaining ball corresponding to the connecting hole of the moving block and the second support is pushed by the second support, moving it inwards from the moving block, releasing the retaining ball from blocking the oil outlet. At this time, the connecting hole and the oil outlet align, and lubricating oil flows through the gap between the oil outlet and the retaining ball into the connecting hole, and then flows through the connecting hole onto the surface of the ball, continuously lubricating it. The lubricating oil reduces the friction between the rollers and balls and the guide pillars and guide sleeves, while also lowering the temperature of the rollers and balls during use and reducing thermal expansion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the structure of the guide post, guide sleeve, and guide mechanism of the present invention; Figure 3 This is a schematic diagram of the guiding mechanism of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure in the middle; Figure 5 This is a schematic diagram of the electric push rod and the moving part of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A; Figure 7 For the present invention Figure 6 A cross-sectional view of the moving block; Figure 8 For the present invention Figure 7 A magnified structural diagram at point B in the middle.

[0017] In the diagram: 1. Mold mechanism; 11. Base plate; 12. Guide pillar; 13. Guide sleeve; 14. Top plate; 15. Lower mold base; 16. Upper mold base; 17. Groove; 2. Guide mechanism; 21. Cage; 211. Cavity; 212. Square hole; 22. Through hole; 23. Drive unit; 231. Electric push rod; 232. Speed ​​sensor; 24. Moving part; 241. Moving block; 242. Limiting block; 243. Limiting groove; 25. Execution unit; 251. First bracket; 252. Second bracket; 253. Fixing plate; 254. Return spring; 26. Roller; 27. Ball; 3. Buffer spring; 4. Oil replenishment mechanism; 41. Vertical plate; 42. Oil outlet hole; 43. Connecting spring; 44. Ball retainer; 45. Oil replenishment hole; 46. Plug; 47. Connecting hole. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0019] like Figures 1 to 8 As shown, the present invention provides a technical solution: a die set for stamping new energy vehicle parts, including a die mechanism 1 and multiple guide mechanisms 2. The die mechanism 1 includes multiple guide pillars 12 and multiple guide sleeves 13. Each guide mechanism 2 is disposed in the annular gap between each guide pillar 12 and the corresponding guide sleeve 13. The guide sleeve 13 is slidably disposed on the guide pillar 12 through the guide mechanism 2, and is used to guide the opening and closing of the die mechanism 1, thereby improving the closing accuracy of the die mechanism 1 and reducing the error during stamping.

[0020] The guide mechanism 2 includes a cage 21, a plurality of rollers 26, a plurality of balls 27 and a switching assembly. The plurality of rollers 26 and balls 27 are all disposed on the cage 21 and in contact with the switching assembly. The switching assembly is disposed inside the cage 21 and is used to switch the contact between the rollers 26 or balls 27 and the guide post 12 and the guide sleeve 13 according to the moving speed of the guide sleeve 13.

[0021] Specifically, when the mold mechanism 1 is under low speed and high load conditions, the switching component inside the cage 21 pushes out the rollers 26 and retracts the balls 27 into the cage 21, so that multiple rollers 26 contact the guide post 12 and the guide sleeve 13 respectively. The high load-bearing capacity of the rollers 26 adapts to the low-speed, heavy-load guiding conditions. When the mold mechanism 1 is under high speed and low load conditions, the switching component inside the cage 21 retracts the rollers 26 and pushes the balls 27 out of the cage 21, so that multiple balls 27 contact the guide post 12 and the guide sleeve 13 respectively. Through the point contact between the balls 27 and the guide post 12 and the guide sleeve 13, the friction between the balls 27 and the guide post 12 and the guide sleeve 13 at high speeds is reduced, adapting to the high-speed, low-load guiding conditions.

[0022] like Figures 4 to 8 As shown, the retainer 21 is located within the annular gap between the guide post 12 and the guide sleeve 13. The retainer 21, guide post 12, and guide sleeve 13 are all hexagonal, allowing the guide post 12 to move linearly relative to the guide sleeve 13. The retainer 21 has multiple cavities 211 inside, and the switching assembly is disposed within each cavity 211. The retainer 21 has multiple through holes 22, and rollers 26 and balls 27 are radially movable within these through holes 22. The rollers 26 extend through the through holes 22 to the outside of the retainer 21, allowing them to contact the guide post 12 and guide sleeve 13 respectively, for operation under low-speed, high-load conditions. Similarly, the balls 27 extend through the through holes 22 to the outside of the retainer 21, allowing them to contact the guide post 12 and guide sleeve 13 respectively, for operation under high-speed, low-load conditions.

[0023] The switching assembly includes a drive unit 23 that switches between rollers 26 and balls 27 by changing the speed of the guide sleeve 13. The drive unit 23 includes an electric push rod 231 and a speed sensor 232. The electric push rod 231 is disposed in the cavity 211, and the speed sensor 232 is disposed on the mold mechanism 1 to detect the moving speed of the guide sleeve 13 and control the movement of the output end of the electric push rod 231.

[0024] The switching assembly also includes a moving part 24 driven by the drive unit 23. The moving part 24 includes multiple moving blocks 241 and two limiting blocks 242. The moving blocks 241 are located at the output end of the electric push rod 231, and the limiting blocks 242 are located at both ends of the moving blocks 241. Two limiting grooves 243 are formed in the inner wall of the cavity 211, and the limiting blocks 242 are slidably disposed in the limiting grooves 243 to increase the stability of the moving blocks 241 during movement. The moving blocks 241 are moved by the electric push rod 231, so that the rollers 26 or balls 27 switch contact with the guide post 12 and the guide sleeve 13.

[0025] Specifically, the movable block 241 is rhomboid in shape, and multiple movable blocks 241 are arranged sequentially along the same direction and connected to each other to form a long strip structure. The internal cavities of the multiple movable blocks 241 are interconnected. The multiple movable blocks 241 are moved synchronously by the electric push rod 231, so that the inclined surface of the movable block 241 can push the roller 26 to extend and contact the guide post 12 and guide sleeve 13 under low speed and high load conditions, and can push the ball 27 to extend and contact the guide post 12 and guide sleeve 13 under high speed and low load conditions, thereby playing a guiding role.

[0026] The switching assembly also includes an actuator 25, which comprises multiple first supports 251, second supports 252, a fixing plate 253, and a return spring 254. Both the first supports 251 and the second supports 252 are trapezoidal in shape and adapted to the moving block 241. Movement of the moving block 241 pushes either the first support 251 or the second support 252 to move. The first support 251 is movably disposed within the cavity 211, and rollers 26 are rotatably disposed on the first support 251. The second support 252 is movably disposed within the cavity 211, and balls 27 are rotatably disposed on the second support 252. Multiple first supports 251 and second supports 252 are alternately arranged along the axial direction of the retainer 21. The moving part 24 drives the execution part 25 to work. Under low-speed and high-load conditions, the moving block 241 pushes multiple first supports 251 to move the rollers 26 to the outside of the through hole 22, so that the rollers 26 contact the guide post 12 and the guide sleeve 13. Under high-speed and low-load conditions, the moving block 241 pushes multiple second supports 252 to move the balls 27 to the outside of the through hole 22, so that they contact the guide post 12 and the guide sleeve 13.

[0027] It should be noted that the side of the first bracket 251 and the second bracket 252 closest to the moving block 241 is an inclined surface. By moving the moving block 241 up and down, the first bracket 251 or the second bracket 252 is pushed to move laterally, which drives the roller 26 or the ball 27 to move to the outside of the through hole 22, thereby realizing the switching of the roller 26 or the ball 27 under different working conditions.

[0028] Multiple fixing plates 253 are respectively vertically arranged on the first bracket 251 and the second bracket 252, and a reset spring 254 is arranged between the fixing plate 253 and the inner wall of the cavity 211 to reset the first bracket 251 and the second bracket 252. When the moving block 241 moves downward, it pushes the first bracket 251 to move toward the through hole 22. The moving block 241 releases the restriction on the second bracket 252. At this time, the return spring 254 pushes the fixed plate 253 on the second bracket 252 to move, and drives the second bracket 252 to move horizontally toward the moving block 241, so that the second bracket 252 drives the ball 27 to move into the cage 21. When the moving block 241 moves upward, it pushes the second bracket 252 to move toward the through hole 22. The moving block 241 releases the restriction on the first bracket 251. At this time, the return spring 254 pushes the fixed plate 253 on the first bracket 251 to move, and drives the first bracket 251 to move horizontally toward the moving block 241, so that the first bracket 251 drives the roller 26 to move into the cage 21.

[0029] It should be noted that the return spring 254 is made of silicon-manganese alloy steel, which has good elasticity and high strength. It is used to reset the first bracket 251 and the second bracket 252 to prevent the second bracket 252 or the first bracket 251 from failing to reset or resetting slowly after the first bracket 251 or the second bracket 252 has moved.

[0030] When the speed sensor 232 detects that the guide sleeve 13 is moving at high speed, it controls the electric push rod 231 to push the moving block 241 to move. The moving block 241 pushes the ball 27 to move to the outside of the cage 21 and contact the guide post 12 and the guide sleeve 13. At the same time, the ball 26 will move into the cage 21 under the action of the return spring 254. When the speed sensor 232 detects that the guide sleeve 13 is moving at low speed, it controls the electric push rod 231 to push the moving block 241 to move. The moving block 241 pushes the ball 26 to move to the outside of the cage 21 and contact the guide post 12 and the guide sleeve 13. At the same time, the ball 27 will move into the cage 21 under the action of the return spring 254.

[0031] Specifically, the speed sensor 232 is a Doppler laser linear velocity sensor. It uses the laser Doppler effect to irradiate the moving surface and directly calculates the linear velocity based on the frequency difference of the reflected light. This is used to determine the moving speed of the guide sleeve 13, thereby controlling the working state of the electric push rod 231.

[0032] like Figure 7 and Figure 8As shown, each set of moving blocks 241 is equipped with an oil replenishing mechanism 4. The oil replenishing mechanism 4 includes multiple vertical plates 41, multiple connecting springs 43, multiple retaining balls 44, and a plug 46. The vertical plates 41 are located inside the moving blocks 241, and multiple oil outlet holes 42 are opened on the side wall of the moving blocks 241. The connecting springs 43 are located at the end of the vertical plates 41 near the oil outlet holes 42, and the retaining balls 44 are located at the end of the connecting springs 43 away from the vertical plates 41, used to block the oil outlet holes 42 when not in use. The retaining balls 44 are slightly larger than the oil outlet holes 42. The retaining balls 44 will only move linearly left and right inside the moving blocks 241 and will not move to the outside of the moving blocks 241 to affect the sealing of the lubricating oil.

[0033] The movable block 241 has an oil filling hole 45 for injecting lubricating oil into it. A plug 46 is detachably connected to the oil filling hole 45 to prevent lubricating oil from flowing out. In this embodiment, the plug 46 is threadedly connected to the oil filling hole 45. When oil replenishment is needed, the plug 46 is rotated and removed, and lubricating oil is injected into the movable block 241 through an oil pipe. Both the first bracket 251 and the second bracket 252 have connecting holes 47. Lubricating oil flows out through the oil outlet hole 42 and then passes through the connecting holes 47 to lubricate the rollers 26 and balls 27. The retainer 21 has multiple square holes 212 that communicate with the cavity 211 for moving and removing the plug 46.

[0034] It should be noted that the diameter of the connecting hole 47 is smaller than that of the oil outlet hole 42. When the ball retainer 44 is pushed into the moving block 241 by the first bracket 251 or the second bracket 252, the ball retainer 44 releases the blockage of the oil outlet hole 42. At this time, the lubricating oil will flow into the connecting hole 47 through the gap between the ball retainer 44 and the oil outlet hole 42 under the force of the up and down movement of the retainer 21. The lubricating oil passes through the connecting hole 47 to lubricate the roller 26 or the ball 27.

[0035] The mold mechanism 1 also includes a base plate 11, a top plate 14, a lower mold base 15, and an upper mold base 16. Guide pillars 12 are vertically arranged on the base plate 11. The top plate 14 is arranged between multiple guide sleeves 13. The lower mold base 15 is located at one end of the base plate 11 near the top plate 14, and the upper mold base 16 is located at one end of the top plate 14 near the base plate 11. A speed sensor 232 is arranged on the base plate 11 and corresponds to the position of the guide sleeves 13, used to accurately detect the moving speed of the guide sleeves 13. A groove 17 is provided at one end of the lower mold base 15 near the upper mold base 16 to accommodate the upper mold base 16 when the mold is closed. A buffer spring 3 is sleeved on the guide pillar 12. The two ends of the buffer spring 3 are fixed to the base plate 11 and the retainer 21, respectively, and the retainer 21 is reset by the buffer spring 3.

[0036] Working principle: When the mold mechanism 1 is in a low-speed, high-load condition, the electric push rod 231 is in its original position. At this time, the moving block 241 abuts against the first support 251, and the roller 26 on the first support 251 is outside the retainer 21. During the movement of the upper mold base 16, the guide sleeve 13 moves together. Since the guide sleeve 13 is in contact with the roller 26, when the guide sleeve 13 slides, it will drive the roller 26 to roll, drive the retainer 21 to move together and squeeze the buffer spring 3. At the same time, the roller 26 on the other side of the retainer 21 will slide with the guide post 12, so that the guide sleeve 13 can move at low speed on the guide post 12. When the mold mechanism 1 is in a high-speed, low-load condition, the speed sensor 232 will detect that the moving speed of the guide sleeve 13 is increasing. The electric push rod 231 will drive the moving block 241 to move upward. At this time, the moving block 241 releases the limit on the first bracket 251. The return spring 254 will push the fixed plate 253 on the first bracket 251 to move, and drive the first bracket 251 to move horizontally in the direction of the moving block 241, so that the first bracket 251 drives the roller 26 to move into the inside of the retainer 21. The moving block 241 will push the second bracket 252 to drive the ball 27 to move to the outside of the retainer 21 and contact the guide sleeve 13 and the guide post 12. When the guide sleeve 13 moves, it will drive the ball 27 to roll, drive the retainer 21 to move together and squeeze the buffer spring 3. At the same time, the ball 27 on the other side of the retainer 21 will slide with the guide post 12, so that the guide sleeve 13 can move at high speed on the guide post 12.

[0037] During the operation of the roller 26, the moving block 241 abuts against the first bracket 251. The first bracket 251 pushes the retaining ball 44 into the moving block 241, thereby releasing the seal of the oil outlet 42. At this time, the lubricating oil flows through the gap between the retaining ball 44 and the oil outlet 42 into the connecting hole 47, and then flows onto the roller 26. During the rotation of the roller 26, the roller 26 is continuously lubricated. When it is necessary to switch the ball 27, the electric push rod 231 pushes the moving block 241 upward, and the moving block 241 abuts against the first bracket 251. The oil outlet 42 corresponding to the connection hole 47 of 51 will be blocked by the retaining ball 44. The retaining ball 44 corresponding to the connection hole 47 of the second bracket 252 on the moving block 241 will be pushed by the second bracket 252. The second bracket 252 will push the retaining ball 44 into the moving block 241, thereby releasing the retaining ball 44 from blocking the oil outlet 42. At this time, the lubricating oil will flow into the connection hole 47 through the gap between the retaining ball 44 and the oil outlet 42, and flow into the surface of the ball 27 through the connection hole 47. During the rotation of the ball 27, the ball 27 will be continuously lubricated.

[0038] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A die set for stamping new energy vehicle parts, characterized in that, include: The mold mechanism (1) and multiple guide mechanisms (2) are provided. The mold mechanism (1) includes multiple guide pillars (12) and multiple guide sleeves (13). Each guide mechanism (2) is disposed in the annular gap between each guide pillar (12) and the corresponding guide sleeve (13). The guide sleeve (13) is slidably disposed on the guide pillar (12) through the guide mechanism (2) for guiding the mold opening and closing of the mold mechanism (1). The guide mechanism (2) includes a cage (21), a plurality of rollers (26), a plurality of balls (27) and a switching assembly. The plurality of rollers (26) and balls (27) are all disposed on the cage (21) and in contact with the switching assembly. The switching assembly is disposed inside the cage (21). The switching assembly is used to switch the contact between the rollers (26) or balls (27) and the guide post (12) and the guide sleeve (13) according to the moving speed of the guide sleeve (13).

2. The die set for stamping new energy vehicle parts according to claim 1, characterized in that: The retainer (21) is located in the annular gap between the guide post (12) and the guide sleeve (13). The retainer (21), the guide post (12) and the guide sleeve (13) are all hexagonal. The retainer (21) has multiple cavities (211) inside. The switching component is located inside the cavity (211). The retainer (21) has multiple through holes (22). The rollers (26) and the balls (27) are respectively radially movable and arranged in the through holes (22). The switching assembly includes a drive unit (23) that switches between rollers (26) and balls (27) by changing the speed of the guide sleeve (13). The drive unit (23) includes an electric push rod (231) and a speed sensor (232). The electric push rod (231) is located inside the cavity (211), and the speed sensor (232) is located on the mold mechanism (1) to detect the moving speed of the guide sleeve (13) and control the movement of the output end of the electric push rod (231).

3. The die set for stamping new energy vehicle parts according to claim 2, characterized in that: The switching assembly also includes a moving part (24) driven by a drive unit (23). The moving part (24) includes multiple moving blocks (241) and two limiting blocks (242). The moving blocks (241) are located at the output end of the electric push rod (231), and the limiting blocks (242) are located at both ends of the moving blocks (241). Two limiting grooves (243) are opened on the inner wall of the cavity (211). The limiting blocks (242) are slidably located in the limiting grooves (243). The moving blocks (241) are moved by the electric push rod (231) so that the roller (26) or ball (27) switches contact with the guide post (12) and the guide sleeve (13). The movable block (241) is rhomboid in shape. Multiple movable blocks (241) are arranged sequentially along the same direction and connected to each other to form a long strip structure. The inner cavities of the multiple movable blocks (241) are interconnected.

4. The die set for stamping new energy vehicle parts according to claim 3, characterized in that: The switching assembly further includes an execution unit (25), which includes multiple first brackets (251), second brackets (252), a fixing plate (253), and a return spring (254). The first brackets (251) and the second brackets (252) are both trapezoidal to fit the moving block (241). The first brackets (251) are movably disposed in the cavity (211), and the rollers (26) are rotatably disposed on the first brackets (251). The second bracket (252) is movably disposed in the cavity (211), and the ball (27) is rotatably disposed on the second bracket (252). A plurality of first brackets (251) and second brackets (252) are alternately arranged along the axial direction of the retainer (21). Multiple fixing plates (253) are respectively vertically arranged on the first bracket (251) and the second bracket (252), and the reset spring (254) is arranged between the fixing plate (253) and the inner wall of the cavity (211) to reset the first bracket (251) and the second bracket (252).

5. A die set for stamping new energy vehicle parts according to claim 4, characterized in that: When the speed sensor (232) detects that the guide sleeve (13) is moving at high speed, it controls the electric push rod (231) to push the moving block (241) to move. The moving block (241) pushes the ball (27) to move to the outside of the cage (21) and contact the guide post (12) and the guide sleeve (13). At the same time, the ball (26) will move into the cage (21) under the action of the return spring (254). When the speed sensor (232) detects that the guide sleeve (13) is moving at a low speed, it controls the electric push rod (231) to push the moving block (241) to move. The moving block (241) pushes the roller (26) to move to the outside of the cage (21) and contact the guide post (12) and the guide sleeve (13). At the same time, the ball (27) will move into the cage (21) under the action of the return spring (254).

6. A die set for stamping new energy vehicle parts according to claim 4, characterized in that: Each set of the moving blocks (241) is provided with an oil replenishment mechanism (4). The oil replenishment mechanism (4) includes multiple vertical plates (41), multiple connecting springs (43), multiple retaining balls (44) and a plug (46). The vertical plates (41) are located inside the moving blocks (241). Multiple oil outlet holes (42) are opened on the side wall of the moving blocks (241). The connecting springs (43) are located at the end of the vertical plates (41) near the oil outlet holes (42). The retaining balls (44) are located at the end of the connecting springs (43) away from the vertical plates (41) and are used to block the oil outlet holes (42) when not in use.

7. A die set for stamping new energy vehicle parts according to claim 6, characterized in that: The movable block (241) is provided with an oil filling hole (45) for injecting lubricating oil into the movable block (241). The plug (46) is detachably connected to the oil filling hole (45) to prevent lubricating oil from flowing out of the oil filling hole (45). The first bracket (251) and the second bracket (252) are both provided with a connecting hole (47). After the lubricating oil flows out through the oil outlet hole (42), it passes through the connecting hole (47) to lubricate the roller (26) and the ball (27). The retainer (21) is provided with a plurality of square holes (212). The square holes (212) are connected to the cavity (211) for the plug (46) to move and be disassembled.

8. A die set for stamping new energy vehicle parts according to claim 2, characterized in that: The mold mechanism (1) further includes a base plate (11), a top plate (14), a lower mold base (15), and an upper mold base (16). The guide post (12) is vertically arranged on the base plate (11). The top plate (14) is arranged between multiple guide sleeves (13). The lower mold base (15) is arranged at one end of the base plate (11) near the top plate (14). The upper mold base (16) is arranged at one end of the top plate (14) near the base plate (11). The speed sensor (232) is arranged on the base plate (11) and corresponds to the position of the guide sleeve (13).

9. A die set for stamping new energy vehicle parts according to claim 8, characterized in that: A groove (17) is provided on one end of the lower mold base (15) near the upper mold base (16) for accommodating the upper mold base (16) when the mold is closed. A buffer spring (3) is sleeved on the guide post (12), and the two ends of the buffer spring (3) are fixed to the base plate (11) and the retainer (21) respectively.

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