Plate type delay nitrogen spring

Abstract

The utility model discloses a plate-type delay nitrogen spring, which relates to the technical field of nitrogen springs and comprises a bottom plate and a spring component. An oil way is formed in the middle of the bottom plate, a reset assembly is installed at the left end of the upper side of the bottom plate and corresponds to the right end of the oil way, an isolation assembly is installed in the middle of the upper side of the bottom plate, and the lower end of the isolation assembly is located in the oil way; the spring assembly comprises a first cylinder body, a lining, a piston rod, oil, a dustproof ring and a sealing ring, the first cylinder body is fixed to the left end of the upper side of the bottom plate, the left end of the oil way is located in the first cylinder body, the lower end of the interior of the first cylinder body and the interior of the oil way are both filled with the oil, the lining is fixed to the upper end of the interior of the first cylinder body, and the piston rod is fixed to the lower end of the lining. And a piston rod is slidably connected to the interior of the lining, a sealing ring is connected to the circumferential face of the piston rod in a sleeving mode, delayed springback can be conducted, and flaws, caused by instant springback, of a workpiece are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen springs, in particular to a plate-type time-delay nitrogen spring. Background Art

[0002] The mold-specific nitrogen spring (referred to as punch die nitrogen spring or nitrogen spring or nitrogen cylinder or nitrogen cylinder) is a new type of elastic component with high-pressure nitrogen as the working medium. It is small in size, large in elasticity, long in stroke, stable in operation, precise in manufacturing, long in service life, with a gentle elastic curve, and no need for pre-tightening, etc. It has the functions that are difficult to be completed by conventional elastic components such as metal springs, rubber and air cushions, simplifies mold design and manufacturing, facilitates mold installation and adjustment, prolongs the service life of the mold, and ensures the stability of product quality. Nitrogen springs are widely used in automotive molds;

[0003] At present, in the stamping production process, the instantaneous rebound of the nitrogen spring when the punch slider starts to return often makes the workpiece unable to be completely formed to the required size, or the impact of the instantaneous rebound of the nitrogen spring on the workpiece causes defects, affecting the size, appearance and strength of the workpiece. For this reason, we propose a plate-type delayed nitrogen spring. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a plate-type delayed nitrogen spring that can perform delayed rebound to avoid defects on the workpiece caused by instantaneous rebound, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plate-type time-delay nitrogen spring, comprising a base plate and a spring assembly;

[0006] Bottom plate: an oil circuit is opened in the middle, a reset component is installed at the left end of the upper side of the bottom plate, the reset component corresponds to the right end of the oil circuit, an isolation component is installed in the middle of the upper side of the bottom plate, and the lower end of the isolation component is located inside the oil circuit;

[0007] Spring assembly: comprises a first cylinder body, a bushing, a piston rod, oil, a dust ring and a sealing ring. The first cylinder body is fixed to the left end of the upper side of the base plate, the left end of the oil circuit is located inside the first cylinder body, the lower end of the first cylinder body and the inside of the oil circuit are filled with oil, a bushing is fixed to the upper end of the first cylinder body, the piston rod is slidably connected to the inside of the bushing, a sealing ring is sleeved on the circumferential surface of the piston rod, the sealing ring is fixed to the inside of the bushing, a dust ring is fixed to the upper end of the first cylinder body, and the dust ring can be effectively prevented from entering the inside of the first cylinder body by providing the dust ring.

[0008] Furthermore, the isolation component includes a motor, a rotating shaft, a sealing ring, a valve core and a turntable. The motor is installed in the middle of the upper side of the base plate, and an opening is opened in the middle of the base plate. The interior of the opening is rotatably connected with the rotating shaft, and a sealing ring is sleeved on the circumferential surface of the rotating shaft. The sealing ring is fixed inside the opening, and the opening is connected to the oil circuit. A valve core is fixed at the lower end of the rotating shaft, and the valve core is located in the middle of the oil circuit. A through hole is provided in the middle of the valve core, and a turntable is fixed at the lower end of the surface of the valve core, and the turntable is rotatably connected to the lower end of the oil circuit. The input end of the motor is electrically connected to the output end of the external control switch, and the oil circuit is isolated by providing an isolation component.

[0009] Furthermore, the reset assembly includes a second cylinder body, a piston, nitrogen and a sealing plug. The second cylinder body is fixed to the right end of the upper side of the base plate, the right end of the oil circuit is located inside the second cylinder body, the lower end of the inside of the second cylinder body is slidably connected to the piston, the upper end of the inside of the second cylinder body is filled with nitrogen, the upper end of the second cylinder body is provided with an injection hole, the internal thread of the injection hole is connected to the sealing plug, and the piston rod is reset by setting the reset assembly.

[0010] Furthermore, a first annular groove is formed on the circumferential surface of the first cylinder body, a retaining spring is disposed inside the first annular groove, and the retaining spring is clamped on the surface of the bushing. The stability of the bushing can be effectively ensured by providing the retaining spring.

[0011] Furthermore, a second annular groove is provided on the circumferential surface of the first cylinder body, a rubber ring is fixed inside the second annular groove, the rubber ring is fixed on the surface of the bushing, and the rubber ring is located below the retaining ring. The rubber ring can effectively prevent air leakage in the first cylinder body.

[0012] Compared with the prior art, the beneficial effects of the utility model are: the plate-type time-delay nitrogen spring has the following advantages:

[0013] By setting a spring assembly, the piston rod can squeeze the compressed oil to the right along the oil path into the interior of the second cylinder body when it is compressed downward. When the piston rod moves downward to a suitable position, the motor is started to rotate the valve core to isolate the oil path. After isolation, the piston rod can maintain pressure for a long time, thereby avoiding instantaneous rebound and causing defects to the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0015] Figure 2 It is a front side sectional view of the utility model;

[0016] Figure 3 It is an enlarged view of point A of the present utility model.

[0017] In the figure: 1 base plate, 2 oil circuit, 3 spring assembly, 31 first cylinder body, 32 bushing, 33 piston rod, 34 oil, 35 dust ring, 36 sealing ring, 4 isolation assembly, 41 motor, 42 shaft, 43 sealing ring, 44 valve core, 45 turntable, 5 reset assembly, 51 second cylinder body, 52 piston, 53 nitrogen, 54 sealing plug, 6 retaining ring, 7 rubber ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 , This embodiment provides a technical solution: a plate-type time-delay nitrogen spring, including a base plate 1 and a spring assembly 3;

[0020] Bottom plate 1: An oil circuit 2 is provided in the middle, a reset assembly 5 is installed at the left end of the upper side of the bottom plate 1, and the reset assembly 5 corresponds to the right end of the oil circuit 2. An isolation assembly 4 is installed in the middle of the upper side of the bottom plate 1, and the lower end of the isolation assembly 4 is located inside the oil circuit 2. The isolation assembly 4 includes a motor 41, a rotating shaft 42, a sealing ring 43, a valve core 44 and a turntable 45. A motor 41 is installed in the middle of the upper side of the bottom plate 1. An opening is provided in the middle of the bottom plate 1, and the interior of the opening is rotatably connected with a rotating shaft 42. A sealing ring 43 is sleeved on the circumferential surface of the rotating shaft 42, and the sealing ring 43 is fixed inside the opening. The opening is connected to the oil circuit 2, and a valve core 44 is fixed at the lower end of the rotating shaft 42. The valve core 44 is located in the middle of the oil circuit 2, and the middle of the valve core 44 is provided with Through hole, a turntable 45 is fixed at the lower end of the surface of the valve core 44, and the turntable 45 is rotatably connected to the lower end of the inside of the oil circuit 2. The input end of the motor 41 is electrically connected to the output end of the external control switch. The reset component 5 includes a second cylinder 51, a piston 52, nitrogen 53 and a sealing plug 54. The second cylinder 51 is fixed to the right end of the upper side of the bottom plate 1. The right end of the oil circuit 2 is located inside the second cylinder 51. The lower end of the inside of the second cylinder 51 is slidably connected with the piston 52. The upper end of the inside of the second cylinder 51 is filled with nitrogen 53. The upper end of the second cylinder 51 is provided with an injection hole, and the internal thread of the injection hole is connected with a sealing plug 54. The piston rod 33 is reset by setting the reset component 5, and the oil circuit 2 is isolated by setting the isolation component 4;

[0021] Spring assembly 3: comprises a first cylinder body 31, a bushing 32, a piston rod 33, oil 34, a dust ring 35 and a sealing ring 36. The first cylinder body 31 is fixed to the left end of the upper side of the base plate 1, and the left end of the oil circuit 2 is located inside the first cylinder body 31. The lower end inside the first cylinder body 31 and the inside of the oil circuit 2 are filled with oil 34. The bushing 32 is fixed to the upper end inside the first cylinder body 31, and the piston rod 33 is slidably connected inside the bushing 32. A sealing ring 36 is sleeved on the circumferential surface of the piston rod 33, and the sealing ring 36 is fixed inside the bushing 32. The dust ring 35 is fixed to the upper end of the first cylinder body 31. By setting the dust ring 35, dust can be effectively prevented from entering the inside of the first cylinder body 31.

[0022] Wherein: a first annular groove is formed on the circumferential surface of the first cylinder body 31 , a retaining spring 6 is disposed inside the first annular groove, and the retaining spring 6 is clamped on the surface of the bushing 32 . The retaining spring 6 can effectively ensure the stability of the bushing 32 .

[0023] Among them: a second annular groove is opened on the circumferential surface of the first cylinder body 31, and a rubber ring 7 is fixed inside the second annular groove. The rubber ring 7 is fixed on the surface of the bushing 32, and the rubber ring 7 is located below the retaining ring 6. By arranging the rubber ring 7, air leakage of the first cylinder body 31 can be effectively avoided.

[0024] The working principle of the plate-type delayed nitrogen spring provided by the utility model is as follows: during normal use, when the piston rod 33 is compressed downward, the compressed oil 34 will be squeezed along the oil circuit 2 to the right through the through hole set in the middle of the valve core 44 to enter the interior of the second cylinder body 51. After entering, the oil will squeeze the piston 52 upward, and the piston 52 will compress the nitrogen 53 upward. When the piston rod 33 moves downward to a suitable position, the motor 41 is started to rotate the rotating shaft 42. The rotation of the rotating shaft 42 drives the valve core 44 to rotate to isolate the oil circuit 2. After isolation, the piston rod 33 can maintain pressure for a long time, thereby avoiding instantaneous rebound causing defects to the workpiece. When rebound is required, the valve core 44 can be rotated again to open the oil circuit 2. After opening, the nitrogen 53 will squeeze the piston 52 downward, and the piston 52 will squeeze the oil 34 downward to the left and re-enter the interior of the first cylinder body 31. In this case, the piston rod 33 can be slowly reset.

[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Plate-type time-delay nitrogen spring, characterized by: It comprises a base plate (1) and a spring assembly (3); A bottom plate (1): an oil circuit (2) is provided in the middle, a reset component (5) is installed at the left end of the upper side of the bottom plate (1), the reset component (5) and the right end of the oil circuit (2) correspond to each other, an isolation component (4) is installed in the middle of the upper side of the bottom plate (1), and the lower end of the isolation component (4) is located inside the oil circuit (2); The spring assembly (3) comprises a first cylinder body (31), a bushing (32), a piston rod (33), oil (34), a dust ring (35) and a sealing ring (36). The first cylinder body (31) is fixed to the left end of the upper side of the base plate (1). The left end of the oil circuit (2) is located inside the first cylinder body (31). The lower end inside the first cylinder body (31) and the inside of the oil circuit (2) are both filled with oil (34). The bushing (32) is fixed to the upper end inside the first cylinder body (31). The piston rod (33) is slidably connected inside the bushing (32). A sealing ring (36) is sleeved on the circumferential surface of the piston rod (33). The sealing ring (36) is fixed inside the bushing (32). The dust ring (35) is fixed to the upper end of the first cylinder body (31).

2. The plate-type time-delay nitrogen spring according to claim 1, characterized in that: The isolation component (4) comprises a motor (41), a rotating shaft (42), a sealing ring (43), a valve core (44) and a rotating disk (45). The motor (41) is installed in the middle of the upper side of the base plate (1). An opening is provided in the middle of the base plate (1). The interior of the opening is rotatably connected to the rotating shaft (42). A sealing ring (43) is sleeved on the circumferential surface of the rotating shaft (42). The sealing ring (43) is fixed inside the opening. The opening is connected to the oil circuit (2). A valve core (44) is fixed at the lower end of the rotating shaft (42). The valve core (44) is located in the middle of the oil circuit (2). A through hole is provided in the middle of the valve core (44). A rotating disk (45) is fixed at the lower end of the surface of the valve core (44). The rotating disk (45) is rotatably connected to the lower end of the interior of the oil circuit (2). The input end of the motor (41) is electrically connected to the output end of an external control switch.

3. The plate-type time-delay nitrogen spring according to claim 1, characterized in that: The reset assembly (5) comprises a second cylinder (51), a piston (52), nitrogen (53) and a sealing plug (54); the second cylinder (51) is fixed to the right end of the upper side of the base plate (1); the right end of the oil circuit (2) is located inside the second cylinder (51); the piston (52) is slidably connected to the lower end of the second cylinder (51); the nitrogen (53) is filled at the upper end of the second cylinder (51); an injection hole is provided at the upper end of the second cylinder (51); and the sealing plug (54) is threadedly connected to the inner part of the injection hole.

4. The plate-type time-delay nitrogen spring according to claim 1, characterized in that: A first annular groove is provided on the circumferential surface of the first cylinder body (31), a retaining spring (6) is provided inside the first annular groove, and the retaining spring (6) is clamped on the surface of the bushing (32).

5. The plate-type time-delay nitrogen spring according to claim 4 is characterized in that: A second annular groove is provided on the circumferential surface of the first cylinder body (31), a rubber ring (7) is fixed inside the second annular groove, the rubber ring (7) is fixed on the surface of the bushing (32), and the rubber ring (7) is located below the retaining ring (6).

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