Leakage-proof device for shaft output containing cavity of piston rod

Abstract

The leakage-proof device comprises a driving shaft, an assembling wheel is installed at the driving end of the driving shaft, an eccentric wheel is installed on the eccentric portion of the inner side of the assembling wheel, an eccentric shaft is installed on the eccentric portion of the outer wall side of the assembling wheel, and the eccentric shaft is rotationally connected with the eccentric wheel. A hinge rod is hinged to the outer wall side of the eccentric wheel, a piston is arranged above the hinge rod, and a circular groove is formed in the upper portion of the outer wall side of the piston. According to the leakage-proof device for the shaft output containing cavity of the piston rod, the connecting shaft connected to the upper portion of the outer wall of the hinge rod is installed through the penetrating hole formed in the outer wall of the piston, and when the hinge rod pushes the piston to move, the piston can stretch out and draw back in an external cylinder and is used for extruding oil in the space where the external cylinder makes contact with the top of the piston; the oil leakage phenomenon of the containing cavity can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of piston rods, in particular to a leakage prevention device for an outlet shaft cavity of a piston rod. Background Art

[0002] The piston rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements.

[0003] At present, when the piston rod is in operation, the design of the oil leakage prevention components of the piston rod is still defective. For the oil outlet, the traditional straight rod drive component is used, which makes the piston head unable to operate flexibly. After the cavity is squeezed, it is easy to leak oil. Utility Model Content

[0004] The utility model aims to provide a leakage prevention device for an outlet shaft chamber of a piston rod, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A piston rod shaft outlet cavity leakage prevention device comprises a driving shaft, a driving end of the driving shaft is equipped with an assembly wheel, an eccentric wheel is installed at the inner eccentric portion of the assembly wheel, an eccentric shaft is installed at the eccentric portion of the outer wall side of the assembly wheel, the eccentric shaft and the eccentric wheel are rotatably connected, an articulated rod is hinged on the outer wall side of the eccentric wheel, a piston is arranged above the articulated rod, and a circular groove is opened at the upper portion of the outer wall side of the piston.

[0007] As a further solution of the utility model: a through hole is opened on the outer wall side of the piston.

[0008] As a further solution of the utility model: a connecting shaft is installed in the perforated hole, and the outer wall of the connecting shaft is fixedly connected to the top of the hinge rod.

[0009] As a further solution of the utility model: the number of the eccentric wheels is two groups, and the outer wall sides of the two groups of eccentric wheels are both flat.

[0010] As a further solution of the utility model: a sealing ring is installed at the annular groove portion of the circular groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, the connecting shaft connected to the upper part of the outer wall of the hinge rod is installed through the through hole opened in the outer wall of the piston. When the hinge rod is pushed and displaced, the piston will be extended and retracted in the external cylinder to squeeze the oil in the space where the external cylinder and the top of the piston are in contact. The hinged manner can reduce the occurrence of oil leakage in the cavity, and the structure is more optimized and the design is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a structural schematic diagram of a leakage prevention device for an outlet chamber of a piston rod.

[0014] Figure 2 The present invention is an assembly diagram of a drive shaft in a piston rod outlet cavity leakage prevention device.

[0015] Figure 3 The present invention is a cross-sectional view of a driving shaft in a piston rod outlet cavity leakage prevention device.

[0016] In the figure: drive shaft 1, assembly wheel 2, piston 3, eccentric wheel 4, eccentric shaft 5, hinged rod 6, connecting shaft 7, through hole 8, circular groove 9. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figures 1 to 3 In the embodiment of the utility model, a piston rod shaft outlet cavity leakage prevention device comprises a driving shaft 1, a mounting wheel 2 is installed at the driving end of the driving shaft 1, an eccentric wheel 4 is installed at the inner eccentric position of the mounting wheel 2, an eccentric shaft 5 is installed at the eccentric position of the outer wall side of the mounting wheel 2, the eccentric shaft 5 is rotatably connected with the eccentric wheel 4, a hinged rod 6 is hinged on the outer wall side of the eccentric wheel 4, a piston 3 is arranged above the hinged rod 6, a circular groove 9 is opened on the upper part of the outer wall side of the piston 3, a through hole 8 is opened on the outer wall side of the piston 3, a connecting shaft 7 is installed in the hole of the through hole 8, the outer wall of the connecting shaft 7 is fixedly connected to the top of the hinged rod 6, the number of eccentric wheels 4 is two groups, and the outer wall sides of the two groups of eccentric wheels 4 are both flat, and a sealing ring is installed on the annular groove of the circular groove 9.

[0019] The working principle of the utility model is:

[0020] When in use, the driving shaft 1 is controlled to rotate, and the assembly wheel 2 connected to one end of the driving shaft 1 rotates accordingly, and drives the eccentric wheel 4 to rotate eccentrically, which is used to push and displace the hinged rod 6 connected to the outer wall of the eccentric wheel 4, wherein the eccentric shaft 5 eccentrically mounts the eccentric wheel 4 on the assembly wheel 2;

[0021] The connecting shaft 7 connected to the outer wall of the hinged rod 6 is installed through the through hole 8 opened on the outer wall of the piston 3. When the hinged rod 6 is pushed and displaced, the piston 3 will be extended and retracted in the external cylinder to squeeze the oil in the space where the external cylinder contacts the top of the piston 3. The hinged method can reduce the occurrence of oil leakage in the cavity.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A piston rod outlet cavity leakage prevention device, comprising a drive shaft (1), characterized in that: The driving end of the driving shaft (1) is mounted with an assembly wheel (2), an eccentric wheel (4) is mounted at an eccentric portion inside the assembly wheel (2), an eccentric shaft (5) is mounted at an eccentric portion on the outer wall of the assembly wheel (2), the eccentric shaft (5) and the eccentric wheel (4) are rotationally connected, a hinged rod (6) is hingedly connected to the outer wall of the eccentric wheel (4), a piston (3) is arranged above the hinged rod (6), and a circular groove (9) is provided on the upper portion of the outer wall of the piston (3).

2. A piston rod outlet cavity anti-leakage device according to claim 1, characterized in that: A through hole (8) is formed on the outer wall of the piston (3).

3. A piston rod outlet cavity leakage prevention device according to claim 2, characterized in that: A connecting shaft (7) is installed in the hole of the through hole (8), and the outer wall of the connecting shaft (7) is fixedly connected to the top of the hinge rod (6).

4. The anti-leakage device for the piston rod outlet cavity according to claim 1, characterized in that: The number of the eccentric wheels (4) is two groups, and the outer wall sides of the two groups of eccentric wheels (4) are both planar.

5. The anti-leakage device for the piston rod outlet cavity according to claim 1, characterized in that: A sealing ring is installed at the annular groove portion of the circular groove (9).

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