Hydraulic push cylinder

Abstract

The utility model relates to a hydraulic push cylinder, which comprises a piston and piston rod component, a guide sleeve component and a cylinder barrel, and is characterized in that a conical surface is arranged on the piston and piston rod component, the piston and piston rod component is in point contact with the bottom surface of the cylinder barrel, and the contact area is zero. Under the same condition, the thrust borne by the piston and the piston rod assembly is maximized, the thrust is not changed in the whole stroke, and the hydraulic push cylinder is reasonable in design, compact in structure and convenient to operate and use.

Description

Technical Field

[0001] This utility model relates to a hydraulic push cylinder. Background Technology

[0002] Hydraulic cylinders connect pistons and piston rods in various ways. Some cylinders have separate piston rods and pistons that are then connected, while others have the piston and piston rod as a single unit. A common drawback is that when the piston is fully retracted, a portion of its surface area remains against the bottom of the cylinder. This results in the cylinder's thrust not reaching the designed thrust when it first starts, significantly impacting the performance of some micro-motion cylinders. Therefore, existing hydraulic cylinders have limitations and require improvement. Utility Model Content

[0003] The purpose of this invention is to design a hydraulic push cylinder.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a hydraulic push cylinder, comprising: a piston and piston rod assembly 1, a guide sleeve assembly 2, and a cylinder 3, characterized in that: a conical surface 101 is provided on the piston and piston rod assembly 1, and an exhaust hole 201 is provided on the guide sleeve assembly 2. An oil inlet hole 301 is provided on the cylinder 3. The piston and piston rod assembly 1 passes through the inner hole of the guide sleeve assembly 2. The guide sleeve assembly 2 and the cylinder 3 are connected together by threads. Under the action of axial external force, the cone apex of the conical surface 101 of the piston and piston rod assembly 1 rests on the inner bottom surface of the cylinder 3. The contact between the piston and piston rod assembly and the bottom surface of the cylinder is only point contact, and the contact area is zero. When pressurized oil enters the oil inlet hole 301 on the cylinder 3, the piston on the piston rod assembly 1 is subjected to force over the entire area, which overcomes the thrust caused by the reduced contact area between the boss at the bottom of the piston and the bottom surface of the cylinder in ordinary hydraulic cylinders. Under the same conditions, the thrust on the piston and piston rod assembly 1 is maximized, and the thrust remains constant throughout the entire stroke.

[0005] The beneficial effect of this utility model is that the thrust remains balanced and constant during the forward movement of the hydraulic cylinder, which facilitates digital control.

[0006] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0007] Appendix Figure 1 : A structural diagram of a hydraulic push cylinder.

[0008] Appendix Figure 2 : A structural diagram of a hydraulic push cylinder piston and piston rod assembly.

[0009] Appendix Figure 3 : A structural diagram of a hydraulic push cylinder guide sleeve assembly.

[0010] Appendix Figure 4 A structural diagram of a hydraulic push cylinder.

[0011] In the attached diagram: 1—piston and piston rod assembly, 2—guide sleeve assembly, 3—cylinder, 101—conical surface, 201—exhaust port, 301—oil inlet port. Detailed Implementation

[0012] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of this utility model, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this utility model.

[0013] The instruction manual includes Figure 1 As shown: The piston and piston rod assembly 1 passes through the inner hole of the guide sleeve assembly 2, and the guide sleeve assembly 2 and the cylinder 3 are connected together by threads.

[0014] The instruction manual includes Figure 1 As shown: the cone apex of the conical surface 101 of the piston and piston rod assembly 1 rests on the inner bottom surface of the cylinder, and there is point contact between them.

[0015] The instruction manual includes Figure 1 As shown: The piston rod of the piston and piston rod assembly can be precisely bidirectional within the inner hole of the guide sleeve assembly 2.

[0016] The instruction manual includes Figure 2 As shown: The piston rod of the piston and piston rod assembly is provided with a conical surface 101.

[0017] The instruction manual includes Figure 3 As shown: The guide sleeve assembly 2 is provided with an exhaust hole 201.

[0018] The instruction manual includes Figure 4 As shown: The cylinder 3 is provided with an oil inlet hole 301.

[0019] The working process of a hydraulic pusher cylinder: Hydraulic oil enters through the oil inlet 301 on the cylinder barrel 3. The hydraulic oil pushes the piston and piston assembly forward within the cylinder barrel and guide sleeve, causing the cylinder to work. After the work is completed, the external force on the piston and piston assembly pushes the piston and piston assembly back to the starting position, and this cycle repeats. This hydraulic pusher cylinder is reasonably designed, compact in structure, and easy to operate.

Claims

1. A hydraulic pusher cylinder, comprising: The piston and piston rod assembly (1), guide sleeve assembly (2) and cylinder (3) are characterized in that: a conical surface (101) is provided on the piston and piston rod assembly (1), an exhaust hole (201) is provided on the guide sleeve assembly (2), and an oil inlet hole (301) is provided on the cylinder (3). The piston and piston rod assembly (1) passes through the inner hole of the guide sleeve assembly (2). The guide sleeve assembly (2) and the cylinder (3) are connected together by threads. Under the action of axial external force, the cone apex of the conical surface (101) of the piston and piston rod assembly (1) abuts against the inner bottom surface of the cylinder (3). The contact between the piston and piston rod assembly (1) and the bottom surface of the cylinder (3) is only point contact, and the contact area is zero.

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