Hydraulic buffering oil cylinder structure

Abstract

The utility model belongs to a hydraulic buffering oil cylinder structure in the technical field of hydraulic lifting control components. A piston (3) is arranged in the oil cylinder barrel (1), the piston (3) is connected with one end of a piston rod (2), the other end of the piston rod (2) extends out of the oil cylinder barrel (1), the oil cylinder barrel (1) is divided into a piston rod cavity (4) and a piston cavity (5) by the piston (3), the piston (3) and the piston rod (2) are provided with communicating holes (7), and the communicating holes (7) are communicated with the piston rod cavity (4) and the piston cavity (5). The hydraulic buffering oil cylinder structure is simple in structure, the arrangement position of the hydraulic oil pipe is flexible, normal oil supply of the oil cylinder is guaranteed, meanwhile, frequent oil supply of the hydraulic oil pipe is not needed, stretching and retracting of the piston rod can be adjusted through hydraulic oil in the two cavities of the oil cylinder barrel, and the buffering effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic lifting control part technical field more specifically, relate to a kind of hydraulic buffer cylinder structure. BACKGROUND

[0002] The hydraulic cylinder in prior art has the following technical defects: 1. Two groups of hydraulic oil pipes need to be arranged at both ends of the cylinder, and oil is supplied to two cavities on both sides of the piston respectively, which is not convenient for centralized arrangement of piping system; 2. The hydraulic oil pipes need to be frequently filled with oil or drained to control the extension and retraction of the cylinder; 3. The piston in the hydraulic cylinder completely relies on the control of oil filling and draining to move, and the cylinder has no buffering effect.

[0003] The prior art with the name of "cylinder with oil pressure cavity on piston rod" and the publication (announcement) number of "CN205001282U" relates to the field of cylinder and is a cylinder with oil pressure cavity on piston rod. Its features are that the piston is installed on the piston rod, the piston is installed in the cylinder barrel, and the cylinder cover is fixed to the end face of the cylinder barrel; the bottom of the piston rod has an oil pressure cavity, and the bottom of the piston has an oil passing hole. Due to the adoption of the technical scheme, the oil pressure cavity is dug on the piston rod, the hydraulic oil force bearing area during starting of the cylinder is increased, and the starting thrust is increased.

[0004] However, the technology does not involve the technical problems and technical solutions of the present application. CONTENT OF UTILITY MODEL

[0005] The utility model solves the technical problems and provides a hydraulic buffer cylinder structure with simple structure, flexible arrangement position of hydraulic oil pipe, normal oil supply of cylinder, no frequent oil supply of hydraulic oil pipe, adjustment of extension and retraction of piston rod by hydraulic oil in two cavities of cylinder barrel, improved buffering effect, and meeting the use requirements.

[0006] To solve the above technical problems, the utility model adopts the technical scheme that:

[0007] The utility model is a hydraulic buffer cylinder structure, a piston is arranged in a cylinder barrel, the piston is connected to one end of a piston rod, the other end of the piston rod extends to the outside of the cylinder barrel, the piston divides the cylinder barrel into a piston rod cavity and a piston cavity, a communication hole is arranged on the piston and the piston rod, and the communication hole communicates the piston rod cavity and the piston cavity.

[0008] The hydraulic oil force bearing area on one side of the piston rod cavity is smaller than the hydraulic oil force bearing area on one side of the piston cavity.

[0009] The cylinder barrel is connected to a hydraulic oil pipe, and the hydraulic oil pipe communicates the piston cavity.

[0010] The other end of the piston rod extending to the outside of the cylinder barrel is connected to a force applying component.

[0011] The piston rod is provided with a piston rod end head at one end of the cylinder barrel body, and the piston rod end head is connected with the threaded hole of the piston through a threaded part.

[0012] The communication hole penetrates the piston, the piston rod end head and the piston rod.

[0013] The hydraulic oil pipe is connected with the cylinder barrel body through a threaded end head.

[0014] The piston cavity and the piston rod cavity are filled with hydraulic oil.

[0015] The technical scheme of the utility model has the following working principle and beneficial effects:

[0016] The utility model discloses a hydraulic buffer oil cylinder structure, when setting up, setting up the piston in the cylinder barrel body, the piston connects one end of piston rod, the other end of piston rod extends to the outside of cylinder barrel body, the piston rod that extends to the outside of cylinder barrel body is connected with force applying part, and force applying part can exert force on the piston rod, thereby driving the piston to move in the inside of cylinder barrel body, and the cylinder barrel body is divided into the piston rod cavity and the piston cavity by the piston, and the piston and the piston rod are provided with the communication hole, and the communication hole communicates the piston rod cavity and the piston cavity. The cylinder barrel body is divided into two cavities, one end of the piston rod is the piston rod cavity, and the other end is the piston cavity, and the communication hole is formed by punching on the piston rod and the piston part, and the communication hole communicates two cavities, and the inside of the piston cavity and the piston rod cavity is filled with hydraulic oil, so that the hydraulic oil pressure of two cavities remains consistent, and since the force area of one end of the piston cavity is greater than the force area of the piston rod cavity (the piston rod connects the piston and occupies part of the area), the piston rod will generate certain extension force, and the extension and contraction of the piston rod can be adjusted through the pressure change of the hydraulic oil in the inside of two cavities. The working principle of the buffer oil cylinder of the utility model is different from that of the conventional oil cylinder: the piston rod cavity and the piston cavity in the cylinder barrel body are filled with hydraulic oil, so that two cavities of the cylinder barrel body remain a constant pressure, and the piston rod remains fixed and persistent extension force, and when the top of the piston rod is subjected to external force of the force applying part, the hydraulic oil in the piston cavity flows into the piston rod cavity from the piston cavity through the communication hole, and the piston rod pushes the piston to move downwards, at this moment, the volume of the piston rod cavity gradually increases, and the volume of the piston cavity gradually decreases. After the external force applied by the force applying part is cancelled, the hydraulic oil stored in the piston cavity automatically flows into the piston cavity from the piston rod cavity through the communication hole, and pushes the piston rod to extend to the outside of the cylinder barrel body. And through the change of the diameter of the communication hole, the fast and slow degree of the extension and contraction process can be adjusted, the demand of different oil cylinders for the fast and slow extension and contraction is met, the overall structure design is reasonable, and the extension force is persistent. BRIEF DESCRIPTION OF DRAWINGS

[0017] The following is a brief description of the content expressed by each drawing of the specification and the marks in the drawings:

[0018] Figure 1 The cross-sectional structure schematic view of the hydraulic buffering oil cylinder structure is shown in the utility model.

[0019] Figure 2 The partial cross-sectional structure schematic view of the hydraulic buffering oil cylinder structure is shown in the utility model.

[0020] The marks in the drawing are respectively: 1, oil cylinder barrel; 2, piston rod; 3, piston; 4, piston rod cavity; 5, piston cavity; 6, hydraulic oil pipe; 7, communication hole; 8, force applying part; 9, piston rod end. DETAILED DESCRIPTION

[0021] The shape, structure, mutual position and connecting relationship between each part, the function and working principle of each part and the like of the specific implementation mode of the utility model are further explained in detail by the description of the embodiments with reference to the drawings:

[0022] As shown in the drawings Figure 1 , the drawings Figure 2The utility model discloses a hydraulic buffer oil cylinder structure, is provided with piston 3 in oil cylinder barrel 1, piston 3 connects one end of piston rod 2, the other end of piston rod 2 extends to the outside of oil cylinder barrel 1, piston 3 divides oil cylinder barrel 1 into piston rod cavity 4 and piston cavity 5, is provided with communication hole 7 on piston 3 and piston rod 2, and communication hole 7 communicates piston rod cavity 4 and piston cavity 5. The above structure, for the deficiency in the prior art, proposes the technical scheme of improvement. When setting structure, set up piston 3 in oil cylinder barrel 1, piston 3 connects one end of piston rod 2, the other end of piston rod 2 extends to the outside of oil cylinder barrel 1, and the piston rod that extends to the outside of oil cylinder barrel 1 is connected with force applying part, and the force applying part can exert force on the piston rod, thereby driving the piston to move inside the oil cylinder barrel, piston 3 divides oil cylinder barrel 1 into piston rod cavity 4 and piston cavity 5, and communication hole 7 is formed on the piston rod 2 and the piston 3 part and is punched, which communicates the two cavities, and the piston cavity 5 and the piston rod cavity 4 are both filled with hydraulic oil, so that the hydraulic oil pressure of the two cavities remains consistent. Since the force receiving area of the piston cavity 5 is larger than that of the piston rod cavity 4 (the piston rod 2 occupies part of the area when connecting the piston 3), the piston rod 2 will generate a certain extension force; the extension and contraction of the piston rod 2 can be adjusted by the pressure change of the hydraulic oil inside the two cavities. The working principle of the buffer oil cylinder of the utility model is different from that of the conventional oil cylinder: the piston rod cavity 4 and the piston cavity 5 inside the oil cylinder barrel 1 are filled with hydraulic oil, ensuring that the two cavities of the oil cylinder barrel 1 maintain a constant pressure, and the piston rod 2 will maintain a fixed and continuous extension force; when the top of the piston rod 2 is subjected to an external force from the force applying part, the hydraulic oil in the piston cavity 5 flows from the piston cavity 5 into the piston rod cavity 4 through the communication hole 7, and the piston rod 2 pushes the piston 3 to move downward, at which time the volume of the piston rod cavity gradually increases, and the volume of the piston cavity 5 gradually decreases. After the external force applied by the force applying part is removed, the hydraulic oil stored in the piston cavity 5 will automatically flow from the piston rod cavity 4 into the piston cavity 5 through the communication hole 7, pushing the piston rod 2 to extend outward from the oil cylinder barrel 1. By changing the diameter of the communication hole 7, the speed of the extension and contraction process can be adjusted to meet the needs of different oil cylinders for the speed of extension and contraction. The overall structure design is reasonable, and the extension force is continuous. The hydraulic buffer oil cylinder structure described in the utility model has a simple structure, flexible hydraulic oil pipe arrangement position, ensures normal oil supply of the oil cylinder, and at the same time, the hydraulic oil pipe does not need to be frequently supplied with oil, but can adjust the extension and contraction of the piston rod by relying on the hydraulic oil of the two cavities of the oil cylinder barrel, thereby improving the buffering effect.

[0023] The force area of the hydraulic oil on the side of the piston rod cavity 4 is smaller than the force area of the hydraulic oil on the side of the piston cavity 5. The piston rod 2 extends to the outside of the oil cylinder barrel 1 and is connected with the force applying part 8. When the force applying part outside the hydraulic oil cylinder applies external force on the piston rod, the piston rod 2 applies force on the piston 3 and pushes the piston 3 to move downward. After the external force applied by the force applying part is cancelled, the pressure on the side of the piston cavity 5 pushes the piston to move upward, and the hydraulic oil in the piston rod cavity 4 enters the piston cavity 5 through the communication hole 7, so that the oil cylinder is reset.

[0024] The oil cylinder barrel 1 is connected with the hydraulic oil pipe 6, and the hydraulic oil pipe 6 is connected with the piston cavity 5. The hydraulic oil pipe is used to supply oil into the oil cylinder barrel. After the oil is supplied once, the electromagnetic valve on the hydraulic oil cylinder is closed, and at this time, the hydraulic oil works, and frequent oil supply is not required.

[0025] The piston rod 2 is provided with the piston rod head 9 at one end of the oil cylinder barrel 1, and the piston rod head 9 is connected with the threaded hole of the piston 3 through the threaded part. The piston rod 2 is reliably connected with the piston 3 through the piston rod head 9, and the two achieve synchronous action and are not easily separated.

[0026] The communication hole 7 penetrates the piston 3, the piston rod head 9 and the piston rod 2. The communication hole 7 realizes the communication between the piston rod cavity and the piston cavity, and realizes the flow of the hydraulic oil.

[0027] The hydraulic oil pipe 6 is connected with the oil cylinder barrel 1 through the threaded end. The hydraulic oil pipe 6 is reliably connected with the oil cylinder barrel 1 through the threaded end, and the sealing connection between the two is ensured.

[0028] The piston cavity 5 and the piston rod cavity 4 are filled with hydraulic oil.

[0029] The utility model discloses hydraulic buffer oil cylinder structure, set up piston 3 in the oil cylinder barrel 1, piston 3 connects piston rod 2 one end, the other end of piston rod 2 extends to the outside of oil cylinder barrel 1, and the piston rod that extends to the outside of oil cylinder barrel 1 is connected force component, and force component can exert force on piston rod, thereby moving piston in the inside of oil cylinder barrel, and piston 3 divides oil cylinder barrel 1 into piston rod cavity 4 and piston cavity 5, and the through hole 7 is formed on piston 3 and piston rod 2, and the through hole 7 is connected with piston rod cavity 4 and piston cavity 5. Oil cylinder barrel 1 is divided into two cavities, and one end of piston rod 2 is piston rod cavity 4, and the other end is piston cavity 5, and the through hole 7 is formed on piston rod 2 and piston 3 parts, and the two cavities are communicated, and the inside of piston cavity 5 and piston rod cavity 4 is injected with hydraulic oil, and the hydraulic oil pressure of two cavities keeps consistent, and because the stress area of one end of piston cavity 5 is greater than the stress area of piston rod cavity 4 (piston rod 2 will occupy part area), piston rod 2 will produce certain extension force, and the extension and retraction of piston rod 2 can be adjusted by the pressure change of hydraulic oil in the inside of two cavities. The working principle of the buffer oil cylinder of the utility model is different from conventional oil cylinder: the inside of piston rod cavity 4 and piston cavity 5 of oil cylinder barrel 1 is full of hydraulic oil, ensures that the two cavities of oil cylinder barrel 1 keep a constant pressure, and piston rod 2 will keep fixed and persistent extension force, when the top of piston rod 2 is subjected to external force of force component, the hydraulic oil in piston cavity 5 flows into piston rod cavity 4 from piston cavity 5 through the through hole 7, and piston rod 2 will push piston 3 to move downwards, and at this time, the volume of piston rod 2 cavity gradually increases, and the volume of piston cavity 5 gradually decreases. After the external force of force component is cancelled, the hydraulic oil stored in piston cavity 5 will automatically flow into piston cavity 5 from piston rod cavity 4 through the through hole 7, and push piston rod 2 to extend to the outside of oil cylinder barrel 1. Through the diameter change of the through hole 7, the fast and slow degree of extension and retraction process can be adjusted, the demand of different oil cylinders to the fast and slow of extension and retraction is satisfied, the design is reasonable, and the extension force is persistent.

[0030] The utility model has been described exemplarily above in connection with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various improvements are made by adopting the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model is directly applied to other occasions without improvement, which is within the protection scope of the utility model.

Claims

1. A hydraulic cushion cylinder structure, characterized by: The oil cylinder barrel (1) is provided with a piston (3), the piston (3) is connected with one end of a piston rod (2), the other end of the piston rod (2) extends to the outside of the oil cylinder barrel (1), the piston (3) divides the oil cylinder barrel (1) into a piston rod cavity (4) and a piston cavity (5), the piston (3) and the piston rod (2) are provided with a communication hole (7), and the communication hole (7) communicates the piston rod cavity (4) and the piston cavity (5).

2. The hydraulic cushion cylinder structure according to claim 1, characterized by: The hydraulic oil force area on one side of the piston rod cavity (4) is smaller than the hydraulic oil force area on one side of the piston cavity (5).

3. Hydraulic cushion cylinder structure according to claim 1 or 2, characterized in that The oil cylinder barrel (1) is communicated with a hydraulic oil pipe (6), and the hydraulic oil pipe (6) communicates the piston cavity (5).

4. The hydraulic cushion cylinder structure according to claim 1 or 2, characterized by: The piston rod (2) is connected with a force applying part (8) at one end extending to the outside of the oil cylinder barrel (1).

5. The hydraulic cushion cylinder structure according to claim 1 or 2, characterized by: The piston rod (2) is provided with a piston rod end head (9) at one end of the oil cylinder barrel (1), and the piston rod end head (9) is connected with the threaded hole of the piston (3) through a threaded part.

6. The hydraulic cushion cylinder structure according to claim 5, characterized by: The communication hole (7) penetrates the piston (3), the piston rod end head (9) and the piston rod (2).

7. The hydraulic cushion cylinder structure according to claim 3, characterized by: The hydraulic oil pipe (6) is connected with the oil cylinder barrel (1) through a threaded end head.

8. The hydraulic cushion cylinder structure according to claim 1 or 2, characterized by: The piston cavity (5) and the piston rod cavity (4) are injected with hydraulic oil.

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