Lifting pressure maintaining oil cylinder mechanism on bottle blowing machine

Abstract

The utility model provides a lifting pressure-maintaining oil cylinder mechanism on a bottle blowing machine, which comprises an upper template fixed on a rack, and a left lifting oil cylinder, a right lifting oil cylinder and a middle pressure-maintaining oil cylinder are vertically arranged in the upper template; the lifting oil cylinder comprises a first cylinder barrel, a first front cylinder cover, a first rear cylinder cover, a first piston rod and a first piston. The bottom of the first piston rod is connected with a movable plate. The pressure maintaining oil cylinder comprises a second cylinder barrel, a second front cylinder cover, a second rear cylinder cover, a second piston rod and a second piston. The bottom of the second piston rod is connected to the movable plate. The inner side face of the second cylinder barrel is a step section and comprises an upper large-diameter section and a bottom small-diameter section, the outer diameter of the second piston is matched with the inner diameter of the small-diameter section, a hollow guide rod is arranged in the center of the pressure maintaining oil cylinder, a center hole is formed in the second piston rod, and the guide rod penetrates through the center hole of the second piston rod and is matched with the inner wall of the center hole of the second piston rod. The lifting device has high lifting speed and can provide high pressure after running in place.

Description

Technical Field

[0001] The utility model relates to a bottle blowing machine, in particular to a lifting and pressure-maintaining oil cylinder mechanism on the bottle blowing machine. Background Art

[0002] Plastic bottles are widely used in daily life and are used in all walks of life. Plastic bottles are produced by blowing through a bottle blowing machine. The current bottle blowing machine has a basic structure and mature technology. The overall structure of the bottle blowing machine is complex, and more cylinders are used as driving parts. The cylinder has a large driving force, stable operation and low cost. The selection of the cylinder usually depends on the specific working conditions. When pressure maintenance is required, a larger cylinder is required to ensure sufficient pressure. When driving, a smaller cylinder needs to be rotated to obtain a faster running speed. When it is difficult to take into account both the faster running speed and the greater pressure required in one place. Utility Model Content

[0003] In view of the above problems, the utility model aims to provide a lifting and pressure-maintaining oil cylinder mechanism on a bottle blowing machine, which has a novel structure, can have a relatively large lifting speed and can provide relatively large pressure after running into place.

[0004] The technical solution of the utility model is a lifting and pressure-maintaining oil cylinder mechanism on a bottle blowing machine, comprising an upper template fixed on a frame, wherein two lifting and pressure-maintaining oil cylinders on the left and right sides and a middle pressure-maintaining oil cylinder are vertically arranged in the upper template;

[0005] The lifting cylinder comprises a first cylinder barrel in a straight cylindrical shape fixedly connected in the upper template, the bottom of the first cylinder barrel is connected to the bottom surface of the upper template through a first front cylinder cover, the top of the first cylinder barrel is connected to a first rear cylinder cover, a first piston rod is arranged inside the first cylinder barrel, a first piston is arranged at the top of the first piston rod, and a moving plate is connected to the bottom of the first piston rod;

[0006] The pressure-maintaining oil cylinder includes a second cylinder barrel fixedly connected to the upper template, the bottom of the second cylinder barrel is connected to the bottom surface of the upper template through a second front cylinder cover, the top of the second cylinder barrel is connected to a second rear cylinder cover, a second piston rod is arranged inside the second cylinder barrel, a second piston is arranged on the top of the second piston rod, and the bottom of the second piston rod is connected to a moving plate; the inner side surface of the second cylinder barrel is a stepped section, including a large diameter section at the top and a small diameter section at the bottom, the outer diameter of the second piston is matched with the inner diameter of the small diameter section, a hollow guide rod is arranged at the center of the pressure-maintaining oil cylinder, a center hole is arranged in the second piston rod, the guide rod passes through the center hole of the second piston rod and is matched with the inner wall of the center hole of the second piston rod.

[0007] Preferably, the top of the guide rod is fixedly connected to the center of the second rear cylinder head, and the bottom of the guide rod is an outwardly protruding cylindrical block, which is adapted to the center hole of the second piston rod. The top of the center hole passes through the top surface of the guide rod, and the bottom extends to the cylindrical block and an exhaust hole is provided on the side wall.

[0008] Preferably, the large diameter section and the small diameter section of the second cylinder are transitioned by an arc-shaped curved surface.

[0009] Preferably, when the first piston descends to the bottom of the first cylinder, the second piston is located in the small diameter section and is pressure-maintained by the hydraulic oil above the second piston.

[0010] The utility model has a novel structure and has a faster lifting speed during the lifting process, and can provide a larger pressure-maintaining pressure after the lowering operation is in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the initial state of the utility model;

[0012] Figure 2 for Figure 1 A top view of

[0013] Figure 3 for Figure 2 Cross-sectional view along AA direction;

[0014] Figure 4 This is a schematic diagram of the structure of the lifting cylinder and the pressure-maintaining cylinder of the utility model after they have been lowered to their proper positions;

[0015] Figure 5 for Figure 3 Schematic diagram of the structure after the middle lifting cylinder and the pressure-maintaining cylinder have been lowered to their positions;

[0016] Among them: 1—upper template; 2—lifting cylinder; 21—first cylinder barrel; 22—first front cylinder head; 23—first rear cylinder head; 24—first piston rod; 25—first piston; 3—pressure-maintaining cylinder; 31—second cylinder barrel; 311—large diameter section; 312—small diameter section; 32—second front cylinder head; 33—second rear cylinder head; 34—second piston rod; 35—second piston; 36—guide rod; 361—exhaust hole; 4—moving plate. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] like Figures 1 to 5 As shown, the utility model provides a lifting and pressure-maintaining cylinder mechanism on a bottle blowing machine, comprising an upper template 1 fixed on a frame, wherein two lifting cylinders 2 on the left and right and a pressure-maintaining cylinder 3 in the middle are vertically arranged in the upper template 1;

[0019] The lifting cylinder 2 comprises a straight first cylinder barrel 21 fixedly connected to the upper template 1, the bottom of the first cylinder barrel 21 is connected to the bottom surface of the upper template 1 through a first front cylinder cover 22, the top of the first cylinder barrel 21 is connected to a first rear cylinder cover 23, a first piston rod 24 is arranged inside the first cylinder barrel 21, a first piston 25 is arranged at the top of the first piston rod 24, and a movable plate 4 is connected to the bottom of the first piston rod 24;

[0020] The pressure-maintaining oil cylinder 3 includes a second cylinder barrel 31 fixedly connected to the upper mold plate 1, the bottom of the second cylinder barrel 31 is connected to the bottom surface of the upper mold plate 1 through a second front cylinder cover 32, the top of the second cylinder barrel 31 is connected to a second rear cylinder cover 33, a second piston rod 34 is arranged inside the second cylinder barrel 31, a second piston 35 is arranged on the top of the second piston rod 34, and the bottom of the second piston rod 34 is connected to the moving plate 4; the inner side surface of the second cylinder barrel 31 is a stepped section, including a large diameter section 311 at the top and a small diameter section 312 at the bottom, the outer diameter of the second piston 35 is matched with the inner diameter of the small diameter section 312, a hollow guide rod 36 is arranged at the center of the pressure-maintaining oil cylinder 3, a center hole is arranged in the second piston rod 34, the guide rod 36 passes through the center hole of the second piston rod 34 and is matched with the inner wall of the center hole of the second piston rod 34.

[0021] Among them, the lifting cylinder 2 is a small cylinder, and the pressure-maintaining cylinder 3 is a large cylinder.

[0022] On the basis of the above scheme, the top of the guide rod 36 is fixedly connected to the center of the second rear cylinder cover 33, and the bottom of the guide rod 36 is an outwardly protruding cylindrical block, which is adapted to the center hole of the second piston rod 34. The top of the center hole passes through the top surface of the guide rod 36, and the bottom extends to the cylindrical block and is provided with an exhaust hole 361 on the side wall. The setting of the exhaust hole 361 facilitates the change of the internal cavity of the second piston rod 34 during the lifting process, so that the outside air can smoothly enter and exit the center hole of the second piston rod 34 through the exhaust hole 361.

[0023] In addition, the large diameter section 311 and the small diameter section 312 of the second cylinder 31 are transitioned through an arc-shaped curved surface.

[0024] Specifically, when the first piston 25 descends to the bottom of the first cylinder 21 , the second piston 35 is located in the small diameter section 312 and is pressurized by the hydraulic oil above the second piston 35 .

[0025] The working principle of the utility model is as follows:

[0026] During the lifting stage, the lifting of the first piston rod 24 is realized by the operation of the left and right lifting cylinders 2, and then the lifting of the movable plate 4 is realized. During this lifting process, the movable plate 4 drives the second piston rod 34 to descend synchronously. At this time, there is a gap between the second piston 35 and the large diameter section 311 of the second cylinder 31. The hydraulic oil above and below the second piston 35 is in a connected state, and the upper and lower pressures are balanced, which can ensure the normal downward movement of the second piston rod 34. When the first piston 25 is lowered to the right position, the second piston 35 enters the small diameter section 312 of the second cylinder 31. At this time, the second piston 35 and the inner wall of the small diameter section 312 are in close contact. The pressure is maintained by injecting high-pressure hydraulic oil into the oil pipe at the top of the second cylinder 31. The hydraulic oil pressure above the second piston 35 acts on the top surface of the second piston 35, and the force is applied to the movable plate 4 through the second piston rod 34 to maintain the pressure, so that the movable plate 4 obtains a strong pressure-maintaining pressure.

[0027] The above description is only a preferred implementation mode of the utility model, and does not impose any form of limitation on the utility model. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the utility model still falls within the scope of the technical solution of the utility model.

Claims

1. A lifting and pressure-maintaining cylinder mechanism on a bottle blowing machine, comprising an upper template (1) fixed on a frame, characterized in that: Two left and right lifting cylinders (2) and a middle pressure-maintaining cylinder (3) are vertically arranged in the upper template (1); The lifting cylinder (2) comprises a straight-cylindrical first cylinder (21) fixedly connected to the upper template (1); the bottom of the first cylinder (21) is connected to the bottom surface of the upper template (1) via a first front cylinder cover (22); the top of the first cylinder (21) is connected to a first rear cylinder cover (23); a first piston rod (24) is arranged inside the first cylinder (21); a first piston (25) is arranged at the top of the first piston rod (24); and the bottom of the first piston rod (24) is connected to a moving plate (4); The pressure-maintaining oil cylinder (3) comprises a second cylinder barrel (31) fixedly connected to the upper mold plate (1); the bottom of the second cylinder barrel (31) is connected to the bottom surface of the upper mold plate (1) through a second front cylinder cover (32); the top of the second cylinder barrel (31) is connected to a second rear cylinder cover (33); a second piston rod (34) is arranged inside the second cylinder barrel (31); a second piston (35) is arranged at the top of the second piston rod (34); the bottom of the second piston rod (34) is connected to the moving plate (4); the inner side surface of the second cylinder barrel (31) is a stepped section, comprising a large diameter section (311) at the top and a small diameter section (312) at the bottom; the outer diameter of the second piston (35) matches the inner diameter of the small diameter section (312); a hollow guide rod (36) is arranged at the center of the pressure-maintaining oil cylinder (3); a center hole is arranged in the second piston rod (34); the guide rod (36) passes through the center hole of the second piston rod (34) and matches the inner wall of the center hole of the second piston rod (34).

2. The lifting and pressure-maintaining oil cylinder mechanism on the bottle blowing machine according to claim 1 is characterized in that: The top of the guide rod (36) is fixedly connected to the center of the second rear cylinder head (33), and the bottom of the guide rod (36) is an outwardly protruding columnar block, which is adapted to the center hole of the second piston rod (34). The top of the center hole passes through the top surface of the guide rod (36), and the bottom extends to the columnar block and is provided with an exhaust hole (361) on the side wall.

3. The lifting and pressure-maintaining cylinder mechanism on the bottle blowing machine according to claim 1 is characterized in that: The large diameter section (311) and the small diameter section (312) of the second cylinder (31) are transitioned via an arc-shaped curved surface.

4. The lifting and pressure-maintaining oil cylinder mechanism on the bottle blowing machine according to claim 1 is characterized in that: When the first piston (25) moves downward to the bottom of the first cylinder (21), the second piston (35) is located in the small diameter section (312) and is pressure-maintained by the hydraulic oil above the second piston (35).

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