Explosion-proof valve stamping die

Abstract

The utility model discloses an explosion-proof valve stamping die, which relates to the technical field of stamping dies, and adopts the technical scheme that the explosion-proof valve stamping die comprises a lower die, an upper die is arranged at the top of the lower die, two lifting obstacle-avoiding slotted holes are formed in the upper die, and two piston rod through holes, an ejection hole, a piston cavity, a hydraulic oil cavity and a hydraulic oil channel are formed in the lower die; the anti-explosion valve stamping die has the beneficial effects that when the piston moves upwards, the piston extrudes hydraulic oil in the piston cavities into the hydraulic oil cavities through the communicating holes, the hydraulic oil in the hydraulic oil cavities enters the hollow column through the hydraulic oil channels and the oil pipes, and the hydraulic oil in the hollow column enters the hollow column through the hydraulic oil channels and the oil pipes; and then the hollow ejector pin is pushed to move upwards along the ejection hole, the hollow ejector pin moves to eject the anti-explosion valve in the lower die cavity, the purpose of automatically ejecting the anti-explosion valve is achieved, and the anti-explosion valve is prevented from being clamped in the lower die cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a stamping die for an explosion-proof valve. Background Art

[0002] For safety reasons, lithium batteries are generally equipped with a battery top cover with an explosion-proof function. The key role of the battery top cover is played by an explosion-proof valve. The so-called explosion-proof valve structure is not like the valve structure in traditional water conservancy projects. Its main structure is an inward-concave sinking platform with an indentation at the bottom of the sinking platform. When a safety accident occurs to the lithium battery, it will first break through the explosion-proof valve before it explodes, avoiding serious accidents caused by excessive pressure difference between the inside and outside.

[0003] The existing explosion-proof valve has a concave sink, which makes it easy for the punched explosion-proof valve to get stuck inside the die cavity. Therefore, a punching die for the explosion-proof valve is needed, which can automatically push the explosion-proof valve out of the die cavity after the punching of the explosion-proof valve is completed. Utility Model Content

[0004] To this end, the utility model provides an explosion-proof valve stamping die, which uses a piston assembly and a material ejection assembly to solve the problem that the explosion-proof valve is easily stuck in the die cavity after stamping due to its concave sink.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stamping die for an explosion-proof valve, comprising a lower die, an upper die is arranged on the top of the lower die, two lifting and obstacle avoidance slots are provided inside the upper die, two piston rod through holes, a ejection hole, a piston cavity, a hydraulic oil cavity, and a hydraulic oil channel are provided inside the lower die, a connecting hole is provided between the two piston cavities and the hydraulic oil cavity, one end of the two hydraulic oil channels is provided with an ejection assembly, the ejection assembly comprises an oil pipe, one end of the oil pipe is fixedly connected to the hydraulic oil channel, the other end of the oil pipe is fixedly connected to a hollow column, the outer sleeve of the hollow column is provided with a hollow ejector pin, the outer sleeve of the hollow ejector pin is provided with a spring, and piston assemblies are provided inside the two lifting and obstacle avoidance slots.

[0006] Preferably, the piston assembly includes a connecting plate, which is arranged inside the lifting obstacle avoidance slot and is slidably connected to the lifting obstacle avoidance slot, a piston rod is fixedly provided on one side of the connecting plate, a piston is fixedly provided on one end of the piston rod, a one-way hole is opened inside the piston, and a round ball is provided inside the one-way hole.

[0007] Preferably, the bottom of the hollow column is fixedly connected to the lower mold, the top of the hollow column extends into the interior of the hollow ejector pin and is sealingly and slidably connected to the hollow ejector pin, and the top of the hollow ejector pin passes through the ejection hole and is slidably connected to the ejection hole.

[0008] Preferably, one end of the top of the spring is fixedly connected to the lower die, and one end of the bottom of the spring is fixedly connected to the bottom of the hollow ejector pin.

[0009] Preferably, one end of the piston rod extends out of the lifting obstacle avoidance slot and is slidably connected to a side wall of the lifting obstacle avoidance slot.

[0010] Preferably, the piston rod passes through the piston rod through hole and is sealingly and slidingly connected to the piston rod through hole.

[0011] Preferably, one end of the piston rod extending out of the lifting obstacle avoidance slot extends into the interior of the piston cavity.

[0012] Preferably, the piston is disposed inside the piston cavity and is slidably connected to the piston cavity.

[0013] The utility model embodiment has the following advantages:

[0014] 1. When the piston moves upward, the piston squeezes the hydraulic oil in the piston cavity into the hydraulic oil cavity through the connecting hole. The hydraulic oil in the hydraulic oil cavity enters the hollow column through the hydraulic oil channel and the oil pipe, and then pushes the hollow ejector pin to move upward along the ejection hole. The hollow ejector pin moves to eject the explosion-proof valve inside the lower die cavity, so as to achieve the purpose of automatically ejecting the explosion-proof valve and prevent the explosion-proof valve from being stuck inside the lower die cavity.

[0015] 2. When the piston moves to the top of the piston cavity, the connecting hole is at the bottom of the piston, and the contracted spring resets the hollow ejector through the elastic force, so that the hollow ejector is retracted into the ejection hole, which is convenient for the explosion-proof valve raw material to be placed in the mold cavity, and then the hydraulic oil automatically flows back to fill the hydraulic oil cavity and the piston cavity. When the lower mold and the upper mold are closed, the upper mold pushes the connecting plate downward by lifting the top of the obstacle avoidance slot. At this time, the ball moves to the top of the one-way hole to release the blockage of the one-way hole, so that the hydraulic oil that flows back to the bottom of the piston cavity flows to the top of the piston through the one-way hole, which is convenient for driving the hollow ejector to eject the explosion-proof valve when the mold is opened again later. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0018] Figure 1 A partial cutaway stereoscopic view of the mold clamping state provided by the utility model;

[0019] Figure 2 A main view and a partially cutaway stereoscopic view of the mold opening state provided by the utility model;

[0020] Figure 3 A partial cutaway stereoscopic view of the mold opening state provided by the utility model;

[0021] Figure 4 A partial cutaway stereogram provided for the utility model;

[0022] Figure 5 The utility model provides Figure 4 The enlarged stereogram at A in the middle;

[0023] Figure 6 A partial sectional stereoscopic diagram of the lower mold and the upper mold in the mold closing state provided by the utility model;

[0024] Figure 7 This is a main stereoscopic diagram provided by the utility model.

[0025] In the figure: 1 lower die, 2 upper die, 3 lifting obstacle avoidance slot hole, 4 piston rod through hole, 5 ejector hole, 6 piston cavity, 7 connecting hole, 8 hydraulic oil cavity, 9 hydraulic oil channel, 10 oil pipe, 11 hollow column, 12 hollow ejector pin, 13 spring, 14 connecting plate, 15 piston rod, 16 piston, 17 one-way hole, 18 ball. DETAILED DESCRIPTION

[0026] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Refer to the attached Figure 1 -Attached Figure 7The utility model provides an explosion-proof valve stamping die, including a lower die 1, an upper die 2 is provided on the top of the lower die 1, two lifting obstacle avoidance slots 3 are provided inside the upper die 2, two piston rod through holes 4, a ram hole 5, a piston cavity 6, a hydraulic oil cavity 8, and a hydraulic oil channel 9 are provided inside the lower die 1, a connecting hole 7 is provided between the two piston cavities 6 and the hydraulic oil cavity 8, and a ram assembly is provided at one end of the two hydraulic oil channels 9, and the ram assembly includes an oil pipe 10, one end of the oil pipe 10 is fixedly connected to the hydraulic oil channel 9, and the other end of the oil pipe 10 is fixedly connected to a hollow column 11, the outer sleeve of the hollow column 11 is provided with a hollow ejector pin 12, and the outer sleeve of the hollow ejector pin 12 is provided with a spring 13, and piston assemblies are provided inside the two lifting obstacle avoidance slots 3;

[0028] In this embodiment, in order to achieve the purpose of automatically ejecting the explosion-proof valve out of the mold cavity after the explosion-proof valve is stamped, after the stamping is completed, the upper mold 2 moves upward to open the lower mold 1 and the upper mold 2. When the upper mold 2 moves upward, when the bottom of the obstacle avoidance slot hole 3 is lifted and contacts the connecting plate 14, the piston assembly is pulled upward to squeeze the hydraulic oil in the piston cavity 6 into the hydraulic oil cavity 8 through the connecting hole 7. The hydraulic oil in the hydraulic oil cavity 8 enters the hollow column 11 through the hydraulic oil channel 9 and the oil pipe 10, and then pushes the hollow ejector pin 12 to move upward along the ejection hole 5. The hollow ejector pin 12 moves to eject the explosion-proof valve inside the cavity of the lower mold 1, thereby achieving the purpose of automatically ejecting the explosion-proof valve and preventing the explosion-proof valve from being stuck in the cavity of the lower mold 1.

[0029] Among them, in order to achieve the purpose of controlling the lifting and lowering of the hollow ejector pin 12, the present device adopts the following technical solutions: the piston assembly includes a connecting plate 14, the connecting plate 14 is arranged inside the lifting obstacle avoidance slot 3 and is slidably connected to the lifting obstacle avoidance slot 3, a piston rod 15 is fixedly arranged on one side of the connecting plate 14, a piston 16 is fixedly arranged on one end of the piston rod 15, a one-way hole 17 is opened inside the piston 16, a round ball 18 is arranged inside the one-way hole 17, one end of the piston rod 15 extends out of the lifting obstacle avoidance slot 3 and is slidably connected to a side wall of the lifting obstacle avoidance slot 3, the piston rod 15 passes through the piston rod through hole 4 and is sealed and slidably connected to the piston rod through hole 4, one end of the piston rod 15 extending out of the lifting obstacle avoidance slot 3 extends into the piston cavity 6, the piston 16 is arranged inside the piston cavity 6 and is slidably connected to the piston cavity 6, and when the connecting plate 14 moves upward, the piston 16 is driven to move by the piston rod 15, and at this time the round ball 18 is at the bottom of the one-way hole 17. The one-way hole 17 is blocked, so that when the piston 16 moves upward, the piston 16 squeezes the hydraulic oil in the piston chamber 6 into the hydraulic oil chamber 8 through the connecting hole 7. When the piston 16 moves to the top of the piston chamber 6, the connecting hole 7 is at the bottom of the piston 16, and the contracted spring 13 resets the hollow ejector pin 12 through the elastic force, so that the hollow ejector pin 12 is retracted into the ejection hole 5, and then the hydraulic oil automatically flows back to fill the hydraulic oil chamber 8 and the piston chamber 6. When the connecting plate 14 moves downward, the ball 18 moves above the one-way hole 17 to release the blockage of the one-way hole 17, so that the hydraulic oil that flows back to the bottom of the piston chamber 6 flows to the top of the piston 16 through the one-way hole 17, so that the hollow ejector pin 12 is driven to eject the explosion-proof valve when the mold is opened again later. The connecting seams at the connecting plate 14 and the piston rod through hole 4, the piston 16 and the piston chamber 6, and the hollow column 11 and the hollow ejector pin 12 are all connected by sealing rings to prevent leakage of the hydraulic oil.

[0030] Among them, in order to achieve the purpose of automatically retracting the hollow ejector pin 12 into the ejection hole 5, the present device is implemented by the following technical scheme: the bottom of the hollow column 11 is fixedly connected to the lower mold 1, the top of the hollow column 11 extends into the hollow ejector pin 12 and is sealed and slidably connected to the hollow ejector pin 12, the top of the hollow ejector pin 12 passes through the ejection hole 5 and is slidably connected to the ejection hole 5, one end of the top of the spring 13 is fixedly connected to the lower mold 1, and one end of the bottom of the spring 13 is fixedly connected to the bottom of the hollow ejector pin 12. When the piston 16 moves to the top of the piston cavity 6, the communicating hole 7 is at the bottom of the piston 16, and the contracted spring 13 resets the hollow ejector pin 12 through the elastic force, so that the hollow ejector pin 12 is retracted into the ejection hole 5, which is convenient for the explosion-proof valve raw material to be placed in the mold cavity, and then the hydraulic oil automatically flows back and fills the hydraulic oil cavity 8 and the piston cavity 6.

[0031] The use process of the utility model is as follows: when using the utility model, a sufficient amount of hydraulic oil is filled into the piston chamber 6 and the hydraulic oil chamber 8, the lower mold 1 and the upper mold 2 are connected to the hydraulic press equipment, and the explosion-proof valve raw material is placed in the mold cavity of the lower mold 1 and stamped by merging the lower mold 1 and the upper mold 2. After the stamping is completed, the upper mold 2 moves upward to open the lower mold 1 and the upper mold 2. When the upper mold 2 moves upward, when the bottom of the obstacle avoidance slot hole 3 is lifted and contacts with the connecting plate 14, the connecting plate 14 is pulled upward. The movement of the connecting plate 14 drives the piston 16 to move through the piston rod 15. At this time, the ball 18 is at the bottom of the one-way hole 17 to block the one-way hole 17, so that when the piston 16 moves upward, the piston 16 squeezes the hydraulic oil in the piston chamber 6 into the hydraulic oil chamber 8 through the connecting hole 7, and the hydraulic oil inside the hydraulic oil chamber 8 enters the hollow column 11 through the hydraulic oil channel 9 and the oil pipe 10, and then pushes the hollow ejector pin 12 upward along the ejection hole 5 When the piston 16 moves to the top of the piston cavity 6, the connecting hole 7 is at the bottom of the piston 16, and the contracted spring 13 resets the hollow ejector 12 through the elastic force, so that the hollow ejector 12 is retracted into the ejection hole 5, which is convenient for the explosion-proof valve raw material to be placed in the cavity, and then the hydraulic oil automatically flows back and fills the hydraulic oil cavity 8 and the piston cavity 6. When the lower mold 1 is molded with the upper mold 2, the upper mold 2 pushes the connecting plate 14 downward by lifting the top of the obstacle avoidance slot 3. At this time, the ball 18 moves above the one-way hole 17 to release the blockage of the one-way hole 17, so that the hydraulic oil flowing back to the bottom of the piston cavity 6 flows to the top of the piston 16 through the one-way hole 17, so that the hollow ejector 12 is driven to eject the explosion-proof valve when the mold is opened again.

[0032] The above are only preferred embodiments of the present invention. Any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the above technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An explosion-proof valve stamping die, comprising a lower die (1), characterized in that: An upper mold (2) is provided on the top of the lower mold (1), and two lifting obstacle avoidance slots (3) are provided inside the upper mold (2). Two piston rod through holes (4), a material ejection hole (5), a piston cavity (6), a hydraulic oil cavity (8), and a hydraulic oil channel (9) are provided inside the lower mold (1). A connecting hole (7) is provided between the two piston cavities (6) and the hydraulic oil cavity (8). One end of the two hydraulic oil channels (9) is provided with a material ejection assembly. The material ejection assembly includes an oil pipe (10), one end of the oil pipe (10) is fixedly connected to the hydraulic oil channel (9), and the other end of the oil pipe (10) is fixedly connected to a hollow column (11). The hollow column (11) is provided with a hollow ejector pin (12) on the outside, and the hollow ejector pin (12) is provided with a spring (13) on the outside. Piston assemblies are provided inside the two lifting obstacle avoidance slots (3).

2. The explosion-proof valve stamping die according to claim 1, characterized in that: The piston assembly comprises a connecting plate (14), the connecting plate (14) being arranged inside the lifting obstacle avoidance slot hole (3) and being slidably connected to the lifting obstacle avoidance slot hole (3), a piston rod (15) being fixedly arranged on one side of the connecting plate (14), a piston (16) being fixedly arranged on one end of the piston rod (15), a one-way hole (17) being opened inside the piston (16), and a round ball (18) being arranged inside the one-way hole (17).

3. The explosion-proof valve stamping die according to claim 1, characterized in that: The bottom of the hollow column (11) is fixedly connected to the lower mold (1), the top of the hollow column (11) extends into the interior of the hollow ejector pin (12) and is sealingly and slidably connected to the hollow ejector pin (12), and the top of the hollow ejector pin (12) passes through the ejection hole (5) and is slidably connected to the ejection hole (5).

4. The explosion-proof valve stamping die according to claim 1, characterized in that: One end of the top of the spring (13) is fixedly connected to the lower mold (1), and one end of the bottom of the spring (13) is fixedly connected to the bottom of the hollow ejector pin (12).

5. The explosion-proof valve stamping die according to claim 2, characterized in that: One end of the piston rod (15) extends out of the lifting obstacle avoidance slot (3) and is slidably connected to a side wall of the lifting obstacle avoidance slot (3).

6. The explosion-proof valve stamping die according to claim 2, characterized in that: The piston rod (15) passes through the piston rod through hole (4) and is sealingly and slidably connected to the piston rod through hole (4).

7. The explosion-proof valve stamping die according to claim 2, characterized in that: One end of the piston rod (15) extending out of the lifting obstacle avoidance slot (3) extends into the interior of the piston chamber (6).

8. The explosion-proof valve stamping die according to claim 2, characterized in that: The piston (16) is disposed inside the piston chamber (6) and is slidably connected to the piston chamber (6).

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